Role of heparin-binding domain of IGFBP-2 in treatment of metabolic disorders
阅读说明：本技术 Igfbp-2的肝素结合域在治疗代谢紊乱中的作用 (Role of heparin-binding domain of IGFBP-2 in treatment of metabolic disorders ) 是由 D·克莱蒙斯 T·德拉勒 S·米拉诺 T·阿布里巴 于 2019-05-23 设计创作，主要内容包括：本技术通常涉及化合物,特别是涉及用于调节代谢紊乱的肽,其包含胰岛素样生长因子结合蛋白-2(IGFBP-2)的肝素结合域(HBD)。本技术通常还涉及此类化合物在预防和/或治疗代谢紊乱的方法中的用途以及在用于此类用途的组合物和制剂中的用途。(The present technology relates generally to compounds, and in particular to peptides comprising the Heparin Binding Domain (HBD) of insulin-like growth factor binding protein-2 (IGFBP-2) for use in the regulation of metabolic disorders. The present technology also relates generally to the use of such compounds in methods of preventing and/or treating metabolic disorders and in compositions and formulations for such use.)
1. A method for modulating a metabolic disorder in a subject, the method comprising: administering to the subject a therapeutically effective amount of a peptide consisting of:
i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides shown in i) and ii)
And (4) forming.
2. The method of claim 1, wherein the metabolic disorder is a disorder associated with impaired glucose metabolism.
3. The method of claim 1 or 2, wherein the metabolic disorder is further associated with impaired insulin metabolism.
4. The method of any one of claims 1-3, wherein the metabolic disorder is further associated with impaired leptin metabolism.
5. The method of claim 1, wherein the metabolic disorder is rare genetic obesity.
6. The method of claim 1, wherein the metabolic disorder is syndromic obesity.
7. The method of claim 1, wherein the metabolic disorder is a disorder associated with leptin receptor (LEPR) deficiency or leptin deficiency.
8. The method of claim 1, wherein the metabolic disorder is one or more of: hypoglycemia, hyperglycemia, carbohydrate intolerance, glucose intolerance, impaired fasting glucose, impaired glucose tolerance, carbohydrate-lipid metabolism disorders, hyperinsulinemia, type IV hyperlipoproteinemia, insulin resistance, type I diabetes mellitus, type II diabetes mellitus, obesity, impaired beta cell function, acromegaly, diseases associated with an impaired melanocortin 4(MC4) signaling pathway, diseases associated with leptin receptor (LEPR) deficiency, diseases associated with LEPR mutations, leptin receptor-associated monogenic obesity, extreme insulin resistance syndrome, proopiomelanocortin(POMC) deficiency, POMC heterosis,The syndrome, Bardet-Biedl syndrome (BBS), Donohue syndrome (goblin syndrome), Rabson-Mendenhall syndrome, type A extreme insulin resistance syndrome, type B extreme insulin resistance syndrome, type C extreme insulin resistance syndrome, HAIR-AN syndrome, polycystic ovary syndrome (PCOS), congenital lipodystrophy syndrome, Beradinelli-Seip syndrome, acquired lipodystrophy syndrome, systemic lipodystrophy and partial lipodystrophy syndrome.
9. The method according to any one of claims 1 to 7, wherein the HBD is HBD 1.
10. The method of any one of claims 1-8, wherein the peptide is pegylated.
11. The method of any one of claims 1 to 8, wherein the peptide is acylated.
12. The method of any one of claims 1-11, wherein the peptide is cyclic.
13. The method of any one of claims 1-12, wherein the analog thereof is a conserved analog thereof.
14. The method of any one of claims 1-13, wherein the analog is a structural analog thereof, a functional analog thereof, or both.
15. The method of any one of claims 1-9, wherein the peptide is set forth in SEQ ID No. 73 or an analog thereof.
16. The method of any one of claims 1-9, wherein the peptide is as follows: SEQ ID NO 6, SEQ ID NO 7, SEQ ID NO 8, SEQ ID NO 10, SEQ ID NO 11, SEQ ID NO 12, SEQ ID NO 13, SEQ ID NO 14, SEQ ID NO 17, SEQ ID NO 22, SEQ ID NO 23, SEQ ID NO 24, SEQ ID NO 25, SEQ ID NO 26, SEQ ID NO 27, SEQ ID NO 28, SEQ ID NO 29, SEQ ID NO 30, SEQ ID NO 31, SEQ ID NO 32, SEQ ID NO 33, SEQ ID NO 34, SEQ ID NO 35, SEQ ID NO 36, SEQ ID NO 37, SEQ ID NO 38, SEQ ID NO 39, SEQ ID NO 40, SEQ ID NO 41, SEQ ID NO 42, SEQ ID NO 43, SEQ ID NO 44, SEQ ID NO 45, SEQ ID NO 46, SEQ ID NO 47, SEQ ID NO 48, SEQ ID NO 49, SEQ ID NO 50, SEQ ID NO 51, SEQ ID NO 52, SEQ ID NO 53, SEQ ID NO 54, SEQ ID NO 55, SEQ ID NO 56, SEQ ID NO 57, SEQ ID NO 58, SEQ ID NO 59, SEQ ID NO 60, SEQ ID NO 61, SEQ ID NO 62, SEQ ID NO 63, SEQ ID NO 64, SEQ ID NO 65, SEQ ID NO 66, SEQ ID NO 67, SEQ ID NO 68, SEQ ID NO 69, SEQ ID NO 70, SEQ ID NO 71, SEQ ID NO 72, SEQ ID NO 73, SEQ ID NO 74, SEQ ID NO 75, SEQ ID NO 76, SEQ ID NO 77, SEQ ID NO 78, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 106, 107, 108, 109, 110, 111, 112, 113 or any analogue thereof.
17. The method of any one of claims 1-16, wherein the administering is intrathecal administration, subcutaneous administration, transdermal administration, oral administration, intravenous administration, intranasal administration, intraperitoneal administration, intramuscular administration, administration by implant, administration by matrix, administration by gel, or any combination thereof.
18. The method of any one of claims 1-17, wherein the therapeutically effective amount is from about 0.01 μ g/kg to about 100 mg/kg.
19. The method of any one of claims 1-17, wherein the therapeutically effective amount is from about 0.3mg/kg to about 3 mg/kg.
20. The method of any one of claims 1-19, wherein the administering is once, twice or three times daily.
21. The method of any one of claims 1-19, wherein said administering is performed once, twice or three times per week.
22. The method of any one of claims 1-21, wherein the administering is for a period of at least about 1 week or about 28 weeks.
23. The method of any one of claims 1-21, wherein the administering is for a period of time greater than about 28 weeks.
24. A method of restoring glucose homeostasis in a subject, the method comprising: i) administering to the subject a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii).
25. The method of claim 24, wherein the restoration of glucose homeostasis is achieved independently of insulin or insulin-like growth factor-1 (IGF1) or both.
26. A kit, comprising:
a) a pharmaceutical composition comprising: a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides as set forth in i) and ii); and one or more pharmaceutically acceptable carriers; and
b) one or more containers for the pharmaceutical composition; and
c) instructions for its use in regulating metabolic disorders.
27. A method for improving glucose control in a subject, the method comprising: administering to the subject a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides set forth in i) and ii).
28. An isolated peptide for improving glycemic control in a subject, consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii).
29. A method for improving insulin sensitivity in a subject, the method comprising: administering to the subject a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii).
30. An isolated peptide for improving insulin sensitivity in a subject, consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii).
Technical Field
The present technology relates generally to compounds, and in particular to peptides comprising the heparin-binding domain (HBD) of insulin-like growth factor binding protein-2 (IGFBP-2) for use in the prevention and/or treatment of metabolic disorders. The technology also relates generally to the use of such compounds in methods of preventing or treating metabolic disorders and to compositions and formulations for such use.
Background
Insulin-like growth factor binding protein-2 (IGFBP-2) is a 36,000 Dalton protein that is a member of the IGFBP family. There are six (6) forms of high affinity IGF binding proteins. In addition to binding to insulin-like growth factors I and II and acting as transport proteins (especially in the blood), these proteins also have some direct tissue effects unrelated to their ability to bind IGF.
IGFBP-2 is the second most abundant binding protein in serum. In humans, it circulates in healthy subjects at a concentration of 100-600 ng/ml. The protein concentration is high during fetal and birth, and gradually decreases during childhood and adolescence. Between the ages of 60-80, its concentration is increasing by 25%. Serum concentrations of IGFBP-2 are regulated by hormones and nutrients. Fasting results in a significant increase in IGFBP-2, while feeding (especially feeding proteins) restores its concentration to normal.
In addition to its role as a carrier protein for insulin-like growth factors, IGFBP-2 is also capable of regulating bone mass, fat metabolism, and glucose metabolism.IGFBP-2 knockout mice (IGFBP-2)-/-) Bone mass in (d) will decrease and fat mass will increase (DeMambro, Endocrinology, 2008). Conversely, overexpression of IGFBP-2 in mice results in decreased sensitivity to diet-induced obesity and increased sensitivity to insulin (Wheatcroft, Diabetes, 2007; Hedbacker, Cell Metab, 2010). In vitro, IGFBP-2 directly stimulates differentiation of mouse and human osteoblasts (Xi, JBMR,2014), and conversely inhibits differentiation of preadipocytes (Wheatcroft, Diabetes, 2007). For other IGFBPs, the N-terminal region of IGFBP-2 contains an IGF-1 binding site, while the C-terminal region promotes IGF-1 binding, revealing its ability to bind to the extracellular matrix.
IGFBP-2 also contains two Heparin Binding Domains (HBDs), which confer independent functions of binding IGF. HBD1 is a unique HBD located in the linker region, while HBD2 is located in the C-terminal region. Although both HBD1 and HBD2 are responsible for the ability of IGFBP-2 to inhibit adipogenesis (Xi, Endocrinology,2013), only HBD1 mediates bone mass acquisition and osteoblast differentiation properties (Kawai, JBC, 2011; Xi, JBMR, 2014).
Previous studies have disclosed some peptides comprising HBD. For example, WO 2005/014635 discloses cardiovascular disease plasma polypeptides (CPPs) having amino acid sequence similarity to HBD1 and suggests potential diagnostic functions of such CPPs. U.S. patent No.9,220,746 discloses a class of HBD1 peptides that retain the osteogenic neogenesis (osteoplastogenesis) activity of IGFBP-2 and suggests a role for these peptides in the treatment of bone-related disorders. Recently, WO 2018/145006 proposes various HBD fragments which can induce bone formation in vivo.
To date, available experimental data indicate that the biological effects of IGFBP-2, i.e., stimulation of osteoblast differentiation and inhibition of adipocyte differentiation, are mediated at least in part by the HBD of the molecule (Xi, 2013; Kawai, 2013). These properties are common to the various HBD peptide fragments and analogs that are derived and described in U.S. Pat. No.9,220,746 and WO 2018/145006. Since both osteoblasts and adipocytes originate from Mesenchymal Stem Cells (MSC), it was suggested that HBD of IGBP-2 is more favorable for MSC differentiation into osteoblasts than for differentiation into adipocytes.
Another biological effect of IGFBP-2 is the control of glucose. Overexpression of IGFBP-2 may improve glucose control in various leptin deficiency animal models and other obesity and diabetes models (Weathcroft, 2007; Hedbacker, Cell Metab, 2010). This effect appears to be due, at least in part, to an increase in sensitivity to insulin (Hedbacker, Cell meta, 2010). Moreover, IGFBP-2 has been shown to increase glucose uptake by adipocytes and muscle cells in vitro (Assefa, 2018; Yau,2013), and through signaling pathways utilized by insulin and insulin-like growth factor-1 (IGF1), as well as through insulin and IGF1 independent mechanisms. Interestingly, leptin stimulates the expression of the IGFBP-2 gene, and IGFBP-2 is thought to be a mediator of leptin metabolism (Hedbacker, 2010).
Although the biological role of IGFBP-2 in glucose control has been demonstrated, it is unclear whether the HBD domain is involved in these biological roles. In a document showing that HBD1 and HBD2 reduced body weight and fat accumulation in mice, it was shown that HBD1 and HBD2 had no effect on glucose tolerance, thus indicating that HBD was not involved in glucose metabolism (Xi, 2013).
Therefore, it would be very interesting to study therapeutic peptides with the potential to modulate glucose metabolism, e.g. to improve glucose control in a subject.
Summary of The Invention
According to various aspects, the present technology relates to a method for modulating a metabolic disorder (metabolic disorder) in a subject, the method comprising: administering to the subject a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides set forth in i) and ii).
According to various aspects, the present technology relates to an isolated peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii) for use in modulating a metabolic disorder in a subject having a metabolic disease.
According to various aspects, the present technology relates to a kit comprising: a) a pharmaceutical composition comprising: a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides as set forth in i) and ii); and one or more pharmaceutically acceptable carriers; b) one or more containers for the pharmaceutical composition; c) instructions for its use in regulating metabolic disorders.
According to various aspects, the present technology relates to a method for improving glucose control in a subject, the method comprising: administering to a subject a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii).
According to various aspects, the present technology relates to an isolated peptide for improving glycemic control in a subject, consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii).
According to various aspects, the present technology relates to a method for improving insulin sensitivity in a subject, the method comprising: administering to the subject a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii).
According to various aspects, the present technology relates to a method for restoring glucose homeostasis in a subject, the method comprising: administering to a subject a therapeutically effective amount of a peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii). In certain instances, methods of restoring glucose homeostasis can be achieved independently of insulin and insulin-like growth factor-1 (IGF 1).
According to various aspects, the present technology relates to an isolated peptide consisting of: i) a heparin-binding domain (HBD) or analog thereof as set forth in SEQ ID NO. 1; ii) a fragment of the peptide shown in i); or iii) a pharmaceutically acceptable salt of any one of the peptides listed in i) and ii) for use in improving insulin sensitivity in a subject.
Other aspects and features of the present technology will become apparent to those ordinarily skilled in the art upon review of the following description of specific embodiments in conjunction with the accompanying figures.
Drawings
All features of the embodiments described in the present disclosure are not mutually exclusive and may be combined with each other. For example, elements of one embodiment may be used in other embodiments without further mention. A detailed description of specific embodiments is provided below with reference to the accompanying drawings, in which:
FIG. 1 is a graph showing that HBD1 fragment of one embodiment of the present technology improves glucose tolerance in ob/ob mice treated with acylated HBD1(3-11) fragment for two weeks. Data shown are blood glucose levels (mean ± SEM) 45 minutes after intraperitoneal glucose tolerance test (IPGTT). (n;. 5;. p values <0.001 per group).
Figures 2A-2C show graphs demonstrating that the HBD1 fragment of one embodiment of the present technology improves glucose tolerance in ob/ob mice (a mouse model with leptin deficiency leading to insulin resistance) for glucose telemetry. FIG. 2A: 3 hour intraperitoneal glucose tolerance test curve 28 days after treatment of acylated HBD1(3-11) fragment. (n-5-8 in each group; two doses vs VHL, p value <0.0001), two-way anova, multiple comparisons, { fraction > } p < 0.0001; FIG. 2B: fasting blood glucose levels (mean value over 10 min before IPGTT) 28 days after treatment with acylated HBD1(3-11) fragment. (n-5-8; 3mg/kg dose vs VHL, p value <0.005) for each group, unpaired two-tailed t-test vs VHL,. p < 0.005; FIG. 2C: area of intraperitoneal glucose tolerance test curve 3 hours after 28 days of treatment with acylated HBD1(3-11) fragment. (each set of n-5-8), unpaired two-tailed t-test vs VHL, p <0.05, p < 0.0001.
Figures 3A-3B show that HBD1 fragments demonstrating one embodiment of the present technology improve glucose intolerance in ob/ob mice with glucose telemetry, which have insulin resistance due to leptin deficiency. FIG. 3A: mean blood glucose levels at 16 hours before (day-1) and after 27 days of treatment of the acylated HBD1(3-11) fragment. (n-5-8; 3mg/kg dose vs VHL, p-value <0.001 per group); FIG. 3B: change in mean blood glucose levels from baseline at 16 hours after 27 days of treatment with acylated HBD1(3-11) fragment. (n-5-8; 3mg/kg dose vs VHL, p-value <0.01 per group).
Fig. 4 shows a graph demonstrating increased glucose uptake of fully differentiated 3T3 adipocytes treated with HBD1 fragment, some embodiments of the present technology. In the test [ 2 ]3H]-cells were exposed to test compound at a concentration of 3 μ g/ml for 24 hours prior to 2-deoxyglucose uptake. All tested HBD1 peptides stimulated 3T3-LI adipocytes to increase glucose uptake.
Fig. 5A-5C show graphs illustrating the dose-dependent (fig. 5A) and time-dependent (fig. 5B) increase in glucose uptake by fully differentiated C2C12 mouse skeletal muscle myotubes when treated with HBD1 fragment in some embodiments of the present technology. In particular: HBD1SEQ ID NO:73(C18:0-HLGLEEPKK) at 0.8. mu.M, 1.5. mu.M and 2.3. mu.M; alternatively, 1.5. mu.M of SEQ ID NO:73(C18:0-HLGLEEPKK) was used within 2, 4 and 16 hours prior to testing for glucose uptake. In addition, the addition of the HBD1 peptide of SEQ ID NO:73(C18:0-HLGLEEPKK) that binds to insulin produced a cumulative increase in glucose uptake (FIG. 5C).
Figure 6 shows a graph illustrating the dose-dependent phosphorylation (activation) of the Akt pathway by fully differentiated C2C12 mouse skeletal muscle myotubes when treated with HBD1 fragment, an embodiment of the present technology. In particular: HBD1SEQ ID NO:73(C18: 0-HLGLEEPKK). Both insulin and IGF1 use Akt pathway to finally induce GLUT4 to transport to cell membrane, thereby promoting glucose uptake and metabolism. Akt activation by the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) was prevented by treatment with an anti-fibronectin antibody that has been shown to prevent IGFBP2 from binding to the RPTP β receptor and activating the Akt pathway.
Figure 7 shows a graph illustrating the dose-dependent phosphorylation (activation) of the AMPK pathway by fully differentiated C2C12 mouse skeletal muscle myotubes when treated with HBD1 fragment in one embodiment of the present technology. In particular: HBD1SEQ ID NO:73(C18: 0-HLGLEEPKK). The AMPK pathway is independent of neither insulin nor IGF1, but ultimately functions to induce the transport of GLUT4 to the cell membrane, thereby facilitating glucose uptake and metabolism. AMPK activation by the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) was prevented by both treatment with an anti-fibronectin antibody, which has been shown to prevent IGFBP2 from binding to the RPTP beta receptor and activating the Akt pathway, and the AMPK specific inhibitor compound C (cc).
Figure 8 shows a graph illustrating the increase in glucose uptake by fully differentiated C2C12 mouse skeletal muscle myotubes when treated with HBD1 fragment, an embodiment of the present technology. In particular: 1.5 μ M SEQ ID NO:73(C18:0-HLGLEEPKK), used alone or in co-addition with insulin. Increased glucose uptake by the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) was prevented by both treatment with an anti-fibronectin antibody, which has been shown to prevent IGFBP2 binding to the RPTP β receptor, and the AMPK-specific inhibitor Compound C (CC).
Detailed Description
The present description of the technology is not intended to be an exhaustive list of all the different ways in which the technology may be practiced or all the features that may be added to the technology. For example, features illustrated with respect to one embodiment may be incorporated into other embodiments, and features illustrated with respect to a particular embodiment may be deleted from that embodiment. In addition, many variations and additions to the various embodiments presented herein will be apparent to those skilled in the art in light of the present disclosure without departing from the technology. Accordingly, the following description is intended to illustrate some particular embodiments of the present technology and is not intended to be exhaustive or to specify all permutations, combinations and variations thereof. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this technology belongs.
As used herein, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.
The recitation herein of numerical ranges by endpoints is intended to include all numbers subsumed within that range (e.g. the recitation of 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.80, 4, 4.32, and 5).
The term "about" is used herein, explicitly or implicitly, that each quantity given herein refers to the actual given value, and is also meant to refer to the approximation to that given value that would reasonably be inferred based on the ordinary skill in the art, including equivalents and approximations due to the experimental and/or measurement conditions for such given value. For example, in the context of a given value or range, the term "about" refers to a value or range that is within 20%, preferably within 15%, more preferably within 10%, more preferably within 9%, more preferably within 8%, more preferably within 7%, more preferably within 6%, more preferably within 5% of the given value or range.
The expression "and/or" as used herein is to be understood as meaning the specific disclosure of each of the two specified features or components, with or without the other. For example, "a and/or B" will be considered a specific disclosure of each of (i) a, (ii) B, and (iii) a and B, as if each were individually listed herein.
The present disclosure stems from the inventors' study of peptide fragments of IGFBP-2, particularly of the Heparin Binding Domain (HBD) of IGFBP-2, and of how these peptide fragments can be used in methods of modulating metabolic disorders in a subject, for example methods of preventing and/or treating metabolic disorders. In particular, the inventors have found that peptide fragments of heparin-binding domain 1(HBD1) of IGFBP-2 are demonstrated to improve overall glucose tolerance in an insulin-resistant animal model and may be used to modulate glucose metabolism in a subject.
A. Compounds, peptides, fragments and analogs thereof
As used herein, the expressions and terms "heparin-binding domain" and "HBD" refer to the heparin-binding domain of IGFBP-2, while the term "HBD 2" refers to the heparin-binding domain 2 of IGFBP-2. HBD1 is intended to refer to a peptide having the amino acid sequence shown in SEQ ID NO:1, i.e.:1-KHHLGLEEPKKLR-13wherein "1"refers to the amino acid residue at the 5' -terminus or at the N-terminus of the HBD1 peptide. "13"refers to the 3' -terminal or C-terminal amino acid residue of the HBD1 peptide. Thus, the amino acid of HBD1 occupies the following position:
1KH2H3L4G5L6E7E8P9K10K11L12R13
abbreviations recognized in the art will be used to describe amino acids, including L-amino acids (L-amino acids or L-form) and D-amino acids (D-amino acids or D-form), alanine (Ala or A), arginine (Arg or R), asparagine (Asn or N), aspartic acid (Asp or D), cysteine (Cys or C), glutamic acid (Glu or E), glutamine (Gln or Q), glycine (Gly or G), histidine (His or H), isoleucine (Ile or I), leucine (Leu or L), lysine (Lys or K), methionine (Met or M), phenylalanine (Phe or F), proline (Pro or P), serine (Ser or S), threonine (Thr or T), tryptophan (Trp or W), tyrosine (Tyr or Y) and valine (Val or V). The L-amino acid residues in the native peptide sequence may be altered to any of the 20L-amino acids normally found in proteins or the corresponding D-amino acids, any of the rare amino acids, such as, but not limited to, 4-hydroxyproline or hydroxylysine, or non-protein amino acids, such as P-alanine or homoserine. Unless otherwise indicated, the amino acids named herein refer to the L-form.
Naturally occurring variants of a peptide as defined herein are those which may comprise substitutions, additions or deletions with one or more amino acids due to discrete changes in the nucleotide sequence encoding the gene or an allele thereof or alternative splicing of transcribed RNA. It is understood that these changes do not substantially affect the properties, pharmacological and biological characteristics of the variant peptide.
The peptides of the present disclosure may be in the form of a salt. In particular, the acidic function of the molecule may be replaced by a salt derivative thereof, such as, but not limited to, trifluoroacetate.
"peptide," "polypeptide," or "protein" refers to any chain of amino acids, whether of length or post-translational modification (e.g., glycosylation or phosphorylation), chemical modification, or amino acids comprising unnatural or unusual amino acids, such as D-tyrosine, ornithine, aminoadipic acid.
In some embodiments, the peptides of the present disclosure comprise a fragment of HBD 1. In some embodiments, the peptide is 13 amino acids in length. In some embodiments, the peptide is 12 amino acids in length. In some embodiments, the peptide is 11 amino acids in length. In some embodiments, the peptide is 10 amino acids in length. In some embodiments, the peptide is 9 amino acids in length. In some other embodiments, the peptide is 8 amino acids in length. In some other embodiments, the peptide is 7 amino acids in length. In some other embodiments, the peptide is 6 amino acids in length. In some embodiments, the peptide is 5 amino acids in length. In some embodiments, the peptide is 4 amino acids in length.
As used herein, the term and expression "fragment" or "fragment thereof" refers to an amino acid fragment of a peptide such as IGFBP-2 or HBD of IGFBP-2 or HBD1 of IGFBP-2. Fragments of HBD1 were less than 13 amino acid residues. Thus, fragments of HBD1 may be 12, 11, 10, 9, 8, 7, 6, 5, or 4 amino acid residues in length. In some embodiments, the fragment of HBD1 is 12 amino acids in length. In some embodiments, the fragment of HBD1 is 11 amino acids in length. In some embodiments, the fragment of HBD1 is 10 amino acids in length. In some embodiments, the fragment of HBD1 is 9 amino acids in length. In some other embodiments, the fragment of HBD1 is 8 amino acids in length. In some other embodiments, the fragment of HBD1 is 7 amino acids in length. In some other embodiments, the fragment of HBD1 is 6 amino acids in length. In some other embodiments, the fragment of HBD1 is 5 amino acids in length. In some other embodiments, the fragment of HBD1 is 4 amino acids in length.
In one embodiment, the present disclosure provides a peptide having an amino acid sequence as described in table 1. HBD1(1-13) represents full-length HBD 1. The remaining peptides presented in table 1 are fragments of HBD1(1-13) in which no amino acid residues are present at the N-terminus, or at the C-terminus, or at both the N-terminus and the C-terminus.
Table 1: examples of HBD1 peptides
In some embodiments, a peptide of the present disclosure is "purified", "isolated", or "substantially pure". When peptides are separated from naturally associated components, they are "purified", "isolated" or "substantially pure". Typically, a compound is substantially pure when it is at least about 60%, at least about 65%, at least about 70%, at least about 75%, at least about 80%, at least about 85%, at least about 90%, at least about 91%, at least about 92%, at least about 93%, at least about 94%, at least about 95%, at least about 96%, at least about 97%, at least about 98%, or at least about 99% by weight of the total material in the sample. Techniques for purifying or isolating peptides are well known in the art and known to those skilled in the art.
In some other embodiments, certain peptides of the invention may also be in cyclized form, such that the N-terminus or C-terminus are joined directly head-to-tail or joined head-to-tail by insertion of a linker moiety. Such moieties themselves typically comprise one or more amino acid residues that are attached to the backbone in a manner that avoids altering the three-dimensional structure of the peptide relative to the non-cyclized form. Such peptide derivatives may have improved stability and bioavailability relative to non-cyclized peptides.
Methods for cyclizing peptides are well known in the art. Cyclization can be achieved by forming a disulfide bond between two side chain functional groups, an amide or ester bond between one side chain functional group and a backbone a-amino or carboxyl functional group, an amide or ester bond between two side chain functional groups, or an amide bond between a backbone a-amino and carboxyl functional groups. These cyclization reactions are traditionally carried out at high dilution of the solution. Cyclization is typically accomplished when the peptide is attached to a resin. One of the most common methods for the synthesis of cyclic peptides on solid supports is the attachment of the side chains of amino acids to a resin. Using an appropriate protection strategy, the C-and N-termini can be selectively deprotected and cyclized on the resin after chain assembly. This strategy is widely used and compatible with either t-butyloxycarbonyl (Boc) or 9-fluorenylmethoxycarbonyl (Fmoc) protocols. However, it is limited to peptides that contain appropriate side chain functionality for attachment to a solid support. Various methods can be used to achieve efficient synthesis of cyclic peptides. One method of synthesizing cyclic peptides is based on simultaneous cleavage from the resin while cyclizing. After assembly of the appropriate peptide sequence onto a resin by solid phase synthesis or attachment of a linear sequence to a resin, the deprotected amino group can be reacted with its anchor reactive bond to produce a protected cyclic peptide. Typically, a final deprotection step is required to produce the target cyclic peptide. Methods for synthesizing cyclic peptides are well known in the art.
In other embodiments, the disclosure provides analogs of the peptides defined herein. As used herein, the term "analog" refers to an amino acid that has the physiological activity of its parent compound and comprises one or more (e.g., two, three, four, five, or six or more) amino acid sequences that are different from the amino acid sequence of the naturally occurring parent peptide. Such analogs preferably have at least about 40%, at least about 45%, at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, at least about 80%, at least about 85%, at least about 90%, at least about 95%, at least about 96%, at least about 07%, at least about 98%, or at least about 99% of the physiological activity of the parent peptide.
In some other embodiments, the analog may have the same physiological activity as the parent (i.e., have 100% of the physiological activity of the parent peptide) or may have greater than about 100%, greater than about 110%, greater than about 120%, greater than about 130%, greater than about 140%, greater than about 150%, greater than about 160%, greater than about 170%, greater than about 180%, greater than about 190%, greater than about 200%, or greater than about 300% of the physiological activity of the parent peptide.
In some other embodiments, the analog may have a physiological activity that is less than that of the parent (e.g., 95% of the physiological activity of the parent peptide), but may still exhibit a level of activity that is relevant and/or desirable for certain therapeutic applications.
Such different amino acids may be additions, substitutions, deletions, or combinations thereof, including the addition of non-natural side chain groups and backbone linkages. Modifications of peptides to produce analogs thereof are known. See, e.g., U.S. patent nos. 7,323,543, 7,482,171, 7,459,152, and 7,393,919, which are incorporated herein by reference in their entirety. For example, an analog of a peptide comprising HBD1 or an analog of a fragment of HBD1 refers to the peptide of HBD 1: i) a structural analog; or ii) a functional analog; or iii) structural and functional analogues which are especially capable of replacing HBD1 to modulate glucose metabolism, for example to prevent and/or treat metabolic abnormalities associated with impaired glucose metabolism and/or impaired insulin metabolism.
Analogs of the peptides of the present disclosure have at least about 50%, at least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, at least about 80%, at least about 85%, at least about 90%, at least about 95%, at least about 96%, at least about 97%, at least about 98%, or at least 99% sequence homology over their full length to the amino acid sequences described herein and share at least one of the metabolic or biological activities of HBD 1. One skilled in the art will readily identify analogous sequences for HBD1 or fragments of HBD 1. For example, analogs of HBD1 include, but are not limited to, a peptide (KHHLGLEEPKKLR) having the amino acid sequence shown in SEQ ID NO 1, wherein K or H at position 1, 2 or 3 is substituted with R or K, L at position 4 or 6 is substituted with I or V, K at position 10 or 11 is substituted with H or R, L at position 12 is substituted with I or V, and/or R at position 13 is substituted with K or H.
An analogue of HBD1 or an analogue of a fragment of HBD1 is an analogue obtained, for example, by alanine scanning or by amino acid substitution. In some cases, an analog of HBD1 or an analog of a fragment thereof may comprise a non-naturally encoded amino acid, where a non-naturally encoded amino acid refers to an amino acid that is not one of the common amino acids or pyrrolysine or selenocysteine, or an amino acid that occurs by modifying (e.g., post-translationally modifying) naturally encoded amino acids (including, but not limited to, 20 common amino acids or pyrrolysine and selenocysteine), but that is not itself incorporated into a growing polypeptide chain by a translation complex. Examples of such non-naturally occurring amino acids include, but are not limited to, N-acetylglucosamine-L-serine, N-acetylglucosamine-L-threonine, and O-phosphotyrosine. Table 2 gives examples of analogs of HBD1(3-11) having alanine substitutions at different amino acid positions.
Table 2: HBD1(3-11) fragment with alanine substitutions at different positions
SEQ ID NOs
Amino acid sequence
SEQ ID NO:17
ALGLEEPKK
SEQ ID NO:18
HAGLEEPKK
SEQ ID NO:19
HLALEEPKK
SEQ ID NO:20
HLGAEEPKK
SEQ ID NO:21
HLGLAEPKK
SEQ ID NO:22
HLGLEAPKK
SEQ ID NO:23
HLGLEEAKK
SEQ ID NO:24
HLGLEEPAK
SEQ ID NO:25
HLGLEEPKA
Table 3 shows further examples of HBD1 fragment analogs comprising amino acid substitutions at different amino acid positions of HBD1 (3-11).
Table 3: HBD1(3-11) fragment analogs with amino acid substitutions at different positions
In some cases, the sequence of the analog of HBD1 or fragment thereof and the sequence of HBD1 may differ by a substitution, deletion, or addition of 1, 2, 3, 4, 5, 6, 7, 8, or 9 amino acids, or a combination thereof. In some cases, the amino acid substitution is a conservative amino acid substitution. As used herein, the expression "conservative amino acid substitution" refers to a substitution that replaces a residue with another similar characteristic. Typical conservative amino acid substitutions include those of Gly (G), Ala (A), Val (V), Leu (L) and Ile (I); ser (S), Cys (C), Met (M) and Thr (T); those of the acidic residues Asp (D) and Glu (E); those of Asn (N) and Gln (Q); those of the basic residues His (H), Lys (K) and Arg (R); and those of the aromatic residues Phe (F), Try (W) and Tyr (Y). In some embodiments, the present technology provides an isolated peptide having a fragment of HBD1 as set forth in SEQ ID No. 1. In some cases, the fragment is 6 to 10 amino acids in length and comprises 3 to 10 residues of HBD1, i.e.: HLGLEEPK shown as SEQ ID NO.7 or an analogue thereof. Examples of analogs of peptides having the amino acid sequence HLGLEEPK include, but are not limited to, peptides as shown in table 4.
Table 4: HBD1(3-10) fragment analogs with amino acid substitutions at different positions
SEQ ID NO:
Amino acid sequence
SEQ ID NO:112
HLGLEEPR
SEQ ID NO:113
HLGLEEPH
In some embodiments, the present technology provides an isolated peptide having a fragment of HBD1 as set forth in SEQ ID No. 1. In some cases, the fragment is 6 to 10 amino acids in length and comprises 5 to 10 residues of HBD1, i.e.: GLEEPK or an analog thereof as shown in SEQ ID NO. 14. In some other embodiments, the fragment is 6 to 9 amino acids in length and comprises 5 to 10 residues of HBD1, i.e.: GLEEPK or an analog thereof as shown in SEQ ID NO. 14. Examples of analogs of peptides having the amino acid sequence GLEEPK include, but are not limited to, the peptides shown in table 5.
Table 5: analogues of HBD1(5-10) fragments with amino acid substitutions at different positions
SEQ ID NO:
Amino acid sequence
SEQ ID NO:79
GLEEPL
SEQ ID NO:80
GLEEPR
SEQ ID NO:81
GLDEPK
SEQ ID NO:82
GLEDPK
SEQ ID NO:83
GGEEPK
SEQ ID NO:84
GVEEPK
SEQ ID NO:85
GIEEPK
SEQ ID NO:86
VLEEPK
SEQ ID NO:87
LLEEPK
SEQ ID NO:88
ILEEPK
In some other embodiments, the peptides of the present disclosure may be modified. As used herein, the term "modified" when used to identify a peptide refers to any change made to the peptide, such as a change in the length of the peptide, the amino acid sequence, the chemical structure, a co-translational modification, or a post-translational modification of the peptide. In some cases, the peptides of the invention comprise one or more modified amino acid residues.
As used herein, the expression "post-translational modification" refers to any modification of a natural or unnatural amino acid that occurs at that amino acid after it is incorporated into a peptide chain. By way of example only, the term includes in vivo co-translational modifications, in vitro co-translational modifications (e.g., in a cell-free translation system), in vivo post-translational modifications, and in vitro post-translational modifications. Examples of post-translational modifications are, but are not limited to, glycosylation, pegylation, acetylation, acylation, amidation, methylation, carboxylation, phosphorylation, addition of salts, amides or esters (particularly addition of C-terminal esters) and N-acyl derivatives of the peptides of the disclosure. These types of post-translational modifications are well known in the art.
In some embodiments, the peptides of the present disclosure include one or more poly (ethylene glycol) (or "PEG") moieties having a molecular weight of about 10,000 to about 40,000 coupled to the N-or C-terminus of the peptide. "polyalkylene glycol" refers to a straight or branched chain polyalkylene glycol polymer, including but not limited to polyethylene glycol (PEG), polypropylene glycol (PPG), and polybutylene glycol (PBG), and any group of PEG, PPG, and PBGA copolymer of (a) and including a monoalkyl ether of a polyalkylene glycol. Thus, in various embodiments of the present technology, the polyalkylene glycol in the peptides of the invention may be, but is not limited to, polyethylene glycol, polypropylene glycol, polybutylene glycol, and any combination thereof. In certain embodiments, the polyalkylene glycol is polyethylene glycol or "PEG". The term "PEG subunit" refers to a single polyethylene glycol unit, i.e., - (CH)2CH2O)-。
In some embodiments, the polyalkylene glycol (e.g., PEG) may be non-polydisperse, monodisperse, substantially monodisperse, purely monodisperse, or substantially purely monodisperse. "monodisperse" is used to describe a mixture of compounds wherein about 100% of the compounds in the mixture have the same molecular weight. "substantially monodisperse" is used to describe a mixture of compounds wherein at least about 95% of the compounds in the mixture have the same molecular weight. "pure monodisperse" is used to describe a mixture of compounds wherein about 100% of the compounds in the mixture have the same molecular weight and the same molecular structure. Thus, a pure monodisperse mixture is a monodisperse mixture, but a monodisperse mixture is not necessarily a pure monodisperse mixture. "substantially pure monodisperse" is used to describe a mixture of compounds wherein at least about 95% of the compounds in the mixture have the same molecular weight and the same molecular structure. Thus, a substantially pure monodisperse mixture is a substantially monodisperse mixture, but a substantially monodisperse mixture is not necessarily a substantially pure monodisperse mixture. Table 6 gives examples of peptides of the present disclosure modified by pegylation.
Table 6: PEGylated HBD1 fragment
SEQ ID NOs
Amino acid sequence
SEQ ID NO:63
PEG20-C-KHHLGLEEPKKLR
SEQ ID NO:64
KHHLGLEEPKKLR-C-PEG20
SEQ ID NO:65
PEG20-C-HHLGLEEPKK
SEQ ID NO:66
HHLGLEEPKK-C-PEG20
SEQ ID NO:67
PEG20-C-HLGLEEPKK
In some other cases, a peptide of the present disclosure includes one or more acyl groups coupled to any amino acid of the peptide. In some cases, one or more acyl groups are coupled to the N-terminal amino acid or the C-terminal amino acid, or both. In some cases, the acylation of a peptide of the present disclosure is a fatty acylation by which a fatty acid is added to one or more particular amino acids of the peptide. Examples of fatty acylation include addition of lauric acid (C12: 0), tridecylic acid (C13: 0), myristic acid (C14: 0), pentadecylic acid (C15: 0), palmitic acid (C16: 0), margaric acid (margaric acid, C17: 0), stearic acid (C18: 0), nonadecylic acid (C19: 0), arachidonic acid (C20: 0), heneicosanic acid (C21: 0), behenic acid (C22: 0), tricosanic acid (C23: 0), or tetracosanic acid (C24: 0), or mixtures thereof, to one or more amino acids of the peptides of the invention.
In some variations, the fatty acid to be added may be unsaturated (e.g., mono-unsaturated or polyunsaturated). Examples of unsaturated fatty acids include, but are not limited to: i) monounsaturated fatty acids: crotonic acid, myristic acid, palmitoleic acid, alkenoic acid (sapienic acid), oleic acid, elaidic acid, vaccenic acid, gadoleic acid, eicosenoic acid, erucic acid, neuraminic acid; ii) di-unsaturated fatty acids: linoleic acid, eicosadienoic acid, docosadienoic acid; iii) a tri-unsaturated fatty acid: linolenic acid, pinolenic acid, eleostearic acid, mildic acid, dihomo-gamma-linolenic acid, eicosatrienoic acid; iv) tetraunsaturated fatty acids: stearic acid, arachidonic acid, eicosatetraenoic acid, adrenalic acid; v) pentaunsaturated fatty acids: bosopentenoic acid (bosseeopenaeolic acid), eicosapentaenoic acid, ozuzobondo acid (ozubondo acid), sardine acid, tetracosapentaenoic acid (tetracosapentaenoic acid); vi) hexaunsaturated fatty acids: docosahexaenoic acid and herring acid. In some embodiments, the peptides of the present disclosure can be coupled to fatty acids comprising one or more carboxyl functional groups (-COOH). Methods for performing acylation of peptides are well known in the art. Table 7 gives examples of peptides of the present disclosure modified by acylation.
Table 7: acylated HBD1(2-11) fragment
SEQ ID NOs
Amino acid sequence
SEQ ID NO:68
C16:0-HHLGLEEPKK
SEQ ID NO:69
C18:0-HHLGLEEPKK
SEQ ID NO:70
C20:0-HHLGLEEPKK
SEQ ID NO:71
C14:0-HLGLEEPKK
SEQ ID NO:72
C16:0-HLGLEEPKK
SEQ ID NO:73
C18:0-HLGLEEPKK
SEQ ID NO:74
C20:0-HLGLEEPKK
SEQ ID NO:75
C16:0-diacid-HLGLEEPKK
SEQ ID NO:76
HLGLEEPKK-C16:0
SEQ ID NO:78
C16:0-KHHLGLEEPKKLR
In some further embodiments, the peptides of the present disclosure may be coupled to a linker or linker group (e.g., a linker moiety). As used herein, the expression "linker" or "linking group" includes, for example, those non-amino acid linking groups known in the art (see, e.g., U.S. Pat. Nos. 7,468,418; 7,402,652; and 7,351,797, the entire contents of which are incorporated herein by reference), or variants thereof that will be apparent to those skilled in the art.
In some embodiments, a peptide of the present disclosure may comprise more than one modification (e.g., may comprise a PEG group and an acyl group).
In some other embodiments, the peptides of the present disclosure may be coupled to a modifying group that is itself modified. For example, the peptides of the present disclosure may be coupled to fatty acids that are themselves modified. The modified fatty acid may, for example, be coupled to a linker or linking group, and the linker or linking group may itself be linked to another modifying group, such as a PEG group or one or more carboxyl functional groups (-COOH). Combinations of various modifications and methods for accomplishing them will be recognized and understood by those skilled in the art.
Certain aspects of the present technology use polynucleotides. These polynucleotides include isolated polynucleotides encoding the HBD1 peptides, fragments, and analogs defined herein.
The term "polynucleotide" as used herein refers to a molecule consisting of a plurality of deoxyribonucleotide or nucleoside subunits. The linkage between nucleoside subunits may be provided by phosphate, phosphonate, phosphoramidate, phosphorothioate, and the like, or by non-phosphate groups as known in the art, such as peptide-like linkages used in Peptide Nucleic Acids (PNAs). The linking group may be chiral or achiral. Oligonucleotides or polynucleotides may range in length from 2 nucleoside subunits to hundreds or thousands of nucleoside subunits. Although the oligonucleotide is preferably 5 to 100 subunits in length, more preferably 5 to 60 subunits in length, the polynucleotide may be larger in length (e.g., up to 100). The polynucleotide may be any of DNA and RNA. The DNA may be any form of genomic DNA, genomic DNA libraries, cDNA derived from cells or tissues, and synthetic DNA. Furthermore, in certain aspects, the invention may employ vectors comprising a phage, plasmid, cosmid, or phagemid.
Polypeptides useful in the present technology can be prepared by any suitable means known in the art. Such polypeptides include isolated naturally occurring polypeptides, recombinantly produced polypeptides, synthetically produced polypeptides or polypeptides produced by a combination of these methods. Means and methods for preparing such polypeptides are well known in the art.
B. Therapeutic measures
As used herein, the term "treatment" refers to any type of treatment that imparts a benefit to a patient afflicted with a disease, including improving the patient's condition (e.g., the appearance of one or more symptoms), delaying the progression of the disease, and the like.
As used herein, the term "modulate" refers to up-regulation (i.e., activation or stimulation) and down-regulation (i.e., inhibition or suppression) of a response, or a combination or separation of the two.
As used herein, the term "subject" or "patient" generally refers to a mammalian or non-mammalian animal, including for example, but not limited to, a human, rat, mouse, or farm animal. Reference to a subject does not necessarily indicate that it has a disease or disorder. The term "subject" includes, for example, administration of a peptide of the present technology to a mammal or non-mammal as part of an experiment, treatment of a mammal or non-mammal to help alleviate a disease or disorder, and prophylactic treatment of a mammal or non-mammal to delay or prevent the onset of a disease or disorder. The mammalian subject may be a human subject of any age, such as an infant, child, adult or elderly human.
In some embodiments, the peptides of the present disclosure are useful for controlling, regulating, modulating, preventing, ameliorating, alleviating and/or treating metabolic disorders. As used herein, the expression "metabolic disorder" refers to, but is not limited to, a disease associated with an abnormal or impaired metabolic process. Examples of metabolic disorders include, but are not limited to, disorders associated with an acid-base imbalance, disorders associated with impaired calcium metabolism, disorders associated with impaired glucose metabolism, disorders associated with impaired carbohydrate metabolism, disorders associated with impaired iron metabolism, disorders associated with impaired lipid metabolism, malabsorption syndrome, metabolic syndrome, diseases associated with impaired leptin metabolism, diseases associated with impaired insulin metabolism and diseases associated with impaired insulin-like growth factor metabolism.
In some embodiments, the peptides of the present disclosure can be used to modulate glucose metabolism. In some embodiments of these embodiments, the peptides of the present technology can be used to modulate glucose metabolism in a subject having a disorder associated with impaired glucose metabolism. In some other of these embodiments, the peptides of the present technology can be used to control, regulate, prevent, ameliorate, reduce and/or treat a disorder associated with impaired glucose metabolism in a subject.
As used herein, the expression "a condition associated with impaired glucose metabolism" refers to a condition in which plasma glucose cannot be maintained within the normal range. Examples of diseases associated with impaired glucose metabolism include, but are not limited to: hypoglycemia, hyperglycemia, carbohydrate intolerance, glucose intolerance, impaired fasting glucose, impaired glucose tolerance, carbohydrate-lipid metabolism disorders, hyperinsulinemia, type IV hyperlipoproteinemia, insulin resistance, type I diabetes mellitus, type II diabetes mellitus, obesity, impaired beta cell function, acromegaly, diseases associated with an impaired melanocortin 4(MC4) signaling pathway, diseases associated with a leptin receptor (LEPR) deficiency, diseases associated with LEPR mutations, leptin receptor-associated monogenic obesity, extreme insulin resistance syndrome, Proopiomelanocortin (POMC) deficiency, POMC hybridization, diabetes mellitus,the syndrome, Bardet-Biedl syndrome (BBS), Donohue syndrome (gobien syndrome, leprechaunism), Rabson-Mendenhall syndrome, type A extreme insulin resistance syndrome, type B extreme insulin resistance syndrome, type C extreme insulin resistance syndrome, HAIR-AN syndrome, polycystic ovary syndrome (PCOS), congenital lipodystrophy syndrome, Beradinelli-Seip syndrome, acquired lipodystrophy syndrome, systemic lipodystrophy and partial lipodystrophy syndrome.
In some cases, the metabolic disorder is a disease associated with impaired insulin metabolism. As used herein, the expression "a disease associated with impaired insulin metabolism" refers to a disease associated with one of the following: synthesis, circulation and degradation of insulin, and diseases associated with impaired pancreatic function. Examples of diseases associated with impaired insulin metabolism include, but are not limited to, metabolic syndrome, dyslipidemia, atherosclerosis, hypertension, obesity, hyperinsulinemia, glucose intolerance, hypertension, peripheral arterial disease, syndrome a, syndrome B, endothelial dysfunction, diabetes, microalbuminuria and impaired fibrinolysis.
As used herein, the expression "metabolic syndrome" refers to multiple risk factors caused by insulin resistance accompanied by abnormal fat deposition and function. It is composed of coronary heart disease, diabetes, fatty liver and several risk factors for cancer. Clinical manifestations of metabolic syndrome include: hypertension, hyperglycemia, hypertriglyceridemia, high density lipoprotein cholesterol (HDL-C) reduction, abdominal obesity, chest pain or tachypnea: suggesting an increase in cardiovascular disease and other complications, acanthosis nigricans, hirsutism, peripheral neuropathy, retinopathy, xanthoma and blepharoma.
In some embodiments, the peptides of the present disclosure may be used to reduce plasma glucose levels in a subject, and/or to improve overall tolerance and/or resistance to glucose in a subject. In some embodiments of these embodiments, the peptides of the present disclosure can be used to control diabetes in a subject. In some embodiments of these embodiments, the peptides of the present disclosure are useful for preventing diabetes in a subject. In some embodiments of these embodiments, the peptides of the present disclosure are useful for treating diabetes in a subject. In some of these embodiments, the diabetes is type I diabetes. In some other of these embodiments, the diabetes is type II diabetes.
In some embodiments, the peptides of the present disclosure can be used to modulate insulin metabolism. For example, the peptides of the present disclosure may be used to increase insulin secretion, increase insulin sensitivity, decrease insulin resistance, and/or overcome insulin deficiency.
In some embodiments, the peptides of the present technology may be used to control, regulate, prevent, ameliorate, reduce and/or treat hypoglycemia, hyperglycemia, carbohydrate intolerance, glucose intolerance, impaired fasting glucose, impaired glucose tolerance, disorders of carbohydrate-lipid metabolism, hyperinsulinemia, type IVHyperlipoproteinemia, insulin resistance, type I diabetes, type II diabetes, obesity, impaired beta cell function, acromegaly, a disease associated with an impaired melanocortin 4(MC4) signaling pathway, a disease associated with a deficiency in leptin receptor (LEPR), a disease associated with a mutation in LEPR, leptin receptor-associated monogenic obesity, extreme insulin resistance syndrome, Proopiomelanocortin (POMC) deficiency, POMC heterozygosity, obesity, diabetes mellitus,The syndrome, Bardet-Biedl syndrome (BBS), Donohue syndrome (gobien syndrome, leprechaunism), Rabson-Mendenhall syndrome, type A extreme insulin resistance syndrome, type B extreme insulin resistance syndrome, type C extreme insulin resistance syndrome, HAIR-AN syndrome, polycystic ovary syndrome (PCOS), congenital lipodystrophy syndrome, Beradinelli-Seip syndrome, acquired lipodystrophy syndrome, systemic lipodystrophy and partial lipodystrophy syndrome.
In some embodiments, the uses and methods defined herein comprise administering to a subject a therapeutically effective amount of a peptide as defined herein to achieve the effects discussed herein. As used herein, the expression "therapeutically effective amount" refers to an amount of a peptide of the present invention that is effective to produce some of the desired therapeutic effects defined herein, at a reasonable benefit/risk ratio applicable to any medical treatment.
The therapeutically effective amount of any particular peptide of the present disclosure will vary from peptide to peptide, subject to subject, and patient to patient, and will depend on, among other factors, the effect or result to be achieved, the patient, and the route of delivery. In some embodiments, the dose is from about 0.01 μ g/kg to about 100mg/kg, from about 0.01 μ g/kg to about 50mg/kg, from about 0.01 μ g/kg to about 10mg/kg, from about 0.01 μ g/kg to about 5mg/kg, from about 0.1 μ g/kg to about 100mg/kg, from about 0.1 μ g/kg to about 50mg/kg, from about 0.1 μ g/kg to about 10mg/kg, from about 0.1 μ g/kg to about 5mg/kg, from about 1 μ g/kg to about 100mg/kg, from about 1 μ g/kg to about 50mg/kg, from about 1 μ g/kg to about 10mg/kg, from about 1 μ g/kg to about 5mg/kg, from about 10 μ g/kg to about 100mg/kg, from about 10 μ g/kg to about 50mg/kg, from about 10 μ g/kg to about 10mg/kg, from about 10 μ g/kg to about 5mg/kg, from about 100 μ g/kg to about 100mg/kg, from about 100 μ g/kg to about 50mg/kg, from about 100 μ g/kg to about 10mg/kg, from about 100 μ g/kg to about 5 mg/kg.
In some cases, the dose is from about 0.001mg/kg, about 0.05mg/kg, about 0.1mg/kg, about 0.2mg/kg, about 0.3mg/kg, about 0.4mg/kg, about 0.5mg/kg, about 0.6mg/kg, about 0.7mg/kg, about 0.8mg/kg, about 0.9mg/kg or about 1.0mg/kg, up to about 30mg/kg, or about 40 mg/kg. In some cases, a dosage of about 1mg/kg, about 2mg/kg, about 3mg/kg, about 4mg/kg, about 5mg/kg, about 6mg/kg, about 7mg/kg, about 8mg/kg, about 9mg/kg, about 10mg/kg, about 11mg/kg, about 12mg/kg, about 13mg/kg, about 14mg/kg, about 15mg/kg, about 16mg/kg, about 17mg/kg, about 18mg/kg, about 19mg/kg, about 20mg/kg, about 21mg/kg, about 22mg/kg, about 23mg/kg, about 24mg/kg, about 25mg/kg, about 26mg/kg, about 27mg/kg, about 28mg/kg, about 29mg/kg, about 30mg/kg, about 31mg/kg is used, about 32mg/kg, about 33mg/kg, about 34mg/kg, about 35mg/kg, about 36mg/kg, about 37mg/kg, about 38mg/kg, about 39mg/kg, about 40mg/kg, about 41mg/kg, about 42mg/kg, about 43mg/kg, about 44mg/kg, about 45mg/kg, about 46mg/kg, about 47mg/kg, about 48mg/kg, about 49mg/kg, or about 50mg/kg or more. Other examples of therapeutically effective doses include: between about 1 and about 50mg/kg/96hr, between about 1 and about 50mg/kg/48hr, between about 1 and about 50mg/kg/36hr, between about 1 and about 50mg/kg/24hr, between about 1 and about 50mg/kg/12hr, between about 1 and about 25mg/kg/96hr, between about 1 and about 25mg/kg/48hr, between about 1 and about 25mg/kg/36hr, between about 1 and about 25mg/kg/24hr, between about 1 and about 25mg/kg/12hr, between about 1 and about 10mg/kg/96hr, between about 1 and about 10mg/kg/48hr, between about 1 and about 10mg/kg/36hr, between about 1 and about 10mg/kg/24hr, between about 1 and about 10mg/kg/12hr, between about 1 and about 5mg/kg/96hr, between about 1 and about 5mg/kg/48hr, between about 1 and about 5mg/kg/36hr, between about 1 and about 5mg/kg/24hr, between about 1 and about 5mg/kg/12hr, between about 0.001 and about 1mg/kg/96hr, between about 0.001 and about 1mg/kg/48hr, between about 0.001 and about 1mg/kg/36hr, between about 0.001 and about 1mg/kg/24hr, and between about 0.001 and about 1mg/kg/12 hr.
As used herein, "simultaneous administration" refers to two or more peptides, compounds, or compositions that are administered sufficiently close in time to produce a combined effect (i.e., may be simultaneous co-administration, or may be two or more events occurring within a short period of time (e.g., in sequence) before or after each other.
C. Pharmaceutical composition
As used herein, the expression "active agent" refers to a peptide as defined herein.
The expressions "therapeutically acceptable", "therapeutically suitable", "pharmaceutically acceptable" and "pharmaceutically suitable" are used interchangeably herein and refer to a peptide, compound or composition suitable for administration to a subject to achieve the effects described herein, e.g., treatment as defined herein, without undue adverse side effects in view of the severity of the disease and the necessity of treatment.
The above peptides may be formulated for administration in a pharmaceutical carrier according to known techniques. See, for example, Remington, pharmaceutical technology and practice (9 th edition 1995). In the manufacture of the pharmaceutical composition according to the invention, the peptide (including physiologically acceptable salts thereof) is typically mixed with an acceptable carrier. The carrier must, of course, be acceptable in the sense of being compatible with any other ingredients in the composition and not injurious to the patient. The carrier may be a solid or a liquid, or both, and is preferably formulated with the peptide as a unit dose formulation, e.g., a tablet, which may contain from about 0.01 or about 0.5% to about 95% or about 99% by weight of the peptide. One or more active compounds may be incorporated into the compositions of the present invention, which may be prepared by any of the well-known pharmaceutical techniques, including admixing the components, optionally including one or more accessory ingredients.
The compositions of the present disclosure include those suitable for oral, rectal, topical, buccal (e.g., sublingual), vaginal, parenteral (e.g., subcutaneous, intramuscular, intradermal, or intravenous), topical (i.e., skin and mucosal surfaces, including airway surfaces), and transdermal administration, the most suitable route in any given case will depend on the nature and severity of the condition being treated and the nature of the particular peptide being used.
Compositions suitable for oral administration may be presented as discrete units, such as capsules, cachets, lozenges, or tablets, each containing a predetermined amount of the peptide; as a powder or granules; as a solution or suspension in an aqueous or non-aqueous liquid; or as an oil-in-water or water-in-oil emulsion. Such compositions may be prepared by any suitable pharmaceutical method, including the step of bringing into association the peptide with a suitable carrier, which may contain one or more accessory ingredients as described above. Generally, the compositions of the present disclosure are prepared by uniformly and intimately admixing the peptide with liquid or finely divided solid carriers or both, and then, if necessary, shaping the resulting mixture. For example, tablets may be prepared by compressing or molding a powder or granules containing the peptide, optionally together with one or more accessory ingredients. Compressed tablets may be prepared by compressing in a suitable machine the compound in a free-flowing form such as a powder or granules, optionally mixed with a binder, lubricant, inert diluent and/or surface active/dispersing agent. Molded tablets may be made by molding in a suitable machine the powdered compound moistened with an inert liquid binder.
Compositions suitable for buccal (sublingual) administration include lozenges comprising the peptide, usually sucrose and acacia or tragacanth, in a flavoured base; lozenges comprising the peptide in an inert matrix, such as gelatin and glycerol or sucrose and acacia.
Compositions of the present disclosure suitable for parenteral administration comprise sterile aqueous and non-aqueous injection solutions of the peptide, which formulations are preferably isotonic with the blood of the intended recipient. These formulations may contain antioxidants, buffers, bacteriostats and solutes which render the composition isotonic with the blood of the intended recipient. Aqueous and non-aqueous sterile suspensions may include suspending agents and thickening agents. The compositions may be presented in unit-dose or multi-dose containers, for example sealed ampoules and vials, and may be stored in a freeze-dried (lyophilized) condition requiring only the addition of the sterile liquid carrier, for example saline or water for injections, immediately prior to use. Extemporaneous injection solutions and suspensions may be prepared from sterile powders, granules and tablets of the kind previously described. For example, in one aspect of the present disclosure there is provided an injectable, stable, sterile composition comprising a peptide or salt thereof as defined herein in unit dosage form in a sealed container. The peptide or salt is provided in the form of a lyophilizate that can be reconstituted with a suitable pharmaceutically acceptable carrier to form a liquid composition suitable for injection into a subject. Unit dosage forms typically contain from about 10mg to about 10g of the peptide or salt. When the peptide or salt is substantially water-insoluble, a sufficient amount of a physiologically acceptable emulsifier can be used to emulsify the compound or salt in an aqueous carrier. One such useful emulsifier is phosphatidylcholine.
Compositions suitable for rectal administration are preferably presented as unit dose suppositories. These may be prepared by mixing the peptides as defined herein with one or more conventional solid carriers, for example cocoa butter, and then shaping the resulting mixture.
Compositions suitable for topical application to the skin preferably take the form of ointments, creams, lotions, pastes, gels, sprays, aerosols or oils. Carriers that may be used include petrolatum, lanolin, polyethylene glycols, alcohols, dermal penetration enhancers and combinations of two or more thereof.
Compositions suitable for transdermal administration may be presented as discrete patches adapted to remain in intimate contact with the epidermis of the recipient for an extended period of time. Compositions suitable for transdermal administration may also be delivered by iontophoresis (see, e.g., Pharmaceutical Research 3(6):318(1986)), and generally take the form of an optionally buffered aqueous solution of the peptide as defined herein. Suitable compositions comprise citrate or bis \ tris buffer (pH 6) or ethanol/water and contain 0.1M to 0.2M of active ingredient.
In addition, the present disclosure provides liposomal formulations of the peptides disclosed herein and salts thereof. Techniques for forming liposomal suspensions are well known in the art. When a peptide or salt thereof as defined herein is a water-soluble salt, it may be incorporated into a lipid vesicle using conventional liposome technology. In this case, the peptide or salt will be substantially entrapped within the hydrophilic center or core of the liposome due to its water solubility. The lipid layer used may have any conventional composition and may or may not contain cholesterol. When the target peptide or salt is water insoluble, the salt may be substantially entrapped in the hydrophobic lipid bilayer forming the liposomal structure, again using conventional liposome formation techniques. In either case, the size of the liposomes produced can be reduced by using standard sonication and homogenization techniques.
The liposomal formulation containing the active agent disclosed herein or a salt thereof can be lyophilized to produce a lyophilizate, which can be reconstituted with a pharmaceutically acceptable carrier, such as water, to regenerate the liposomal suspension.
Other pharmaceutical compositions may be prepared from the water insoluble active agents disclosed herein or salts thereof, such as aqueous base emulsions. In such cases, the composition will contain a sufficient amount of a pharmaceutically acceptable emulsifier to emulsify the desired amount of the active agent or salt thereof. Particularly useful emulsifiers include phosphatidyl choline and lecithin.
In some embodiments, the peptides of the present disclosure can be delivered to a subject in need thereof using a medical device, particularly using an orthopaedic medical device. Examples of medical devices that can be used to deliver the peptides of the present disclosure include, but are not limited to, sponges (e.g., collagen sponges, gelatin sponges, etc.), dressings, gauges, stents, cages (e.g., intervertebral cages, fusion cages, etc.), bone cements, bone mixers, bone substitutes, tacks, anchors, buttons, prostheses, screws (e.g., facet screws, pedicle screw systems, bone screws, etc.), shims, intramedullary nails, rods (e.g., hip rods, etc.), custom implants, plates (e.g., humeral plates, wrist plates, radial plates, cervical plates, lumbar plates, etc.), and wound products. In these embodiments, the peptides of the present disclosure may be incorporated into the materials used to fabricate the medical device, or may be applied to the materials used to fabricate the medical device or on the medical device itself.
In some other embodiments, the peptides of the present disclosure can be delivered to a subject in need thereof using a delivery device such as a particle (e.g., a nanoparticle or microparticle) or an encapsulation system (e.g., a microcapsule, a microsphere). In some cases, the peptides of the present disclosure may be dispersed in a material forming the delivery system, such as a polymer chain, or may be located in a pore or cavity formed in the delivery system. In certain instances, the release (i.e., slow release, sustained release, or controlled release) of the peptide from such delivery systems can be controlled. Examples of particles and encapsulation systems that can be used to deliver the peptides of the present disclosure are well known in the art.
In addition to one or more active compounds, the pharmaceutical compositions may also contain other additives, such as pH adjusting additives. In particular, useful pH adjusting agents include acids, such as hydrochloric acid, bases or buffers, such as sodium lactate, sodium acetate, sodium phosphate, sodium citrate, sodium borate or sodium gluconate. In addition, the composition may comprise a microbial preservative. Useful microbial preservatives include methyl paraben, propyl paraben and benzyl alcohol. Microbial preservatives are commonly used when the formulations are placed in vials designed for multi-dose use.
In some embodiments, the present technology provides a kit comprising one or more peptides as defined herein, and instructions for use of the kit according to the uses defined herein.
The identification of equivalent peptides, compounds, compositions, methods, uses, and kits are well within the skill of the ordinary artisan and, in light of the teachings of the present disclosure, require only routine experimentation. The practice of the present disclosure will be more fully understood from the following examples, which are given by way of illustration only and are not to be construed in any way as limiting the present disclosure.
Detailed Description
The following examples are presented in order to illustrate the practice of various embodiments of the present technology. They are not intended to limit or define the full scope of the technology. It should be understood that the technology is not limited to the particular embodiments described and illustrated herein, but includes all modifications and variations falling within the scope of the present disclosure as defined by the appended embodiments.
Example 1: HBD1 peptide improves glucose tolerance in vivo
Nine-week old male b6.v-Lepob/j. mice (Charles River) were injected subcutaneously 2 times daily for 15 days with 3mg/kg vehicle (vehicle) (NaCl 0.9%) or peptides as listed in SEQ ID NO:73(C18:0-HLGLEEPKK) (n ═ 5 animals per group) 7 days after acclimation to laboratory conditions. Fasted (overnight) mice were injected intraperitoneally with 1g/kg glucose on day 15. Plasma glucose (expressed as mmol/L) was recorded 45 minutes after glucose injection. The results are shown in FIG. 1. The results show that administration of the HBD1 peptide reduced the plasma glucose level in the IP glucose tolerance test, indicating a role for the HBD1 peptide in glycemic control. These results support the use of HBD1 peptide for the treatment of clinical conditions associated with glucose intolerance or insulin resistance, such as, but not limited to, type 2 diabetes, leptin deficiency, leptin receptor deficiency, and extreme insulin resistance syndrome.
Example 2: effect of HBD1 peptide on glucose tolerance in leptin deficient mice
To further evaluate the effect of HBD1 peptide on glucose and insulin metabolism, basal blood glucose and glucose response to the intraperitoneal glucose tolerance test (IPGTT) were evaluated in glucose telemetric obese ob/ob mice after 28 consecutive days of twice daily HBD peptide administration. The implantation of a glucose telemetry device (HD-XG, data science International) is carried out according to known protocols.
A dose of the HBD peptide fragment of SEQ ID NO:73(C18:0-HLGLEEPKK) was administered twice daily at 8 hour + -1 hour intervals between twice daily administrations. 24 male V-Lepob/J (Ob/Ob) mice (The Jackson Laboratory, Farmington, CT USA) were injected subcutaneously with vehicle (NaCl 0.9%) (control group) or subcutaneously with 1mg/kg and 3mg/kg of peptide (test group) (n ═ 5-8 animals per group) twice daily for 28 days. The first day of administration was designated as the first day. A small injection was made using a sterile syringe and the needle was inserted subcutaneously, alternating between 2-4 injection sites. The injected area was trimmed of animal hair prior to the first injection, and then trimmed as needed during treatment. The administration volume was 5 mL/kg/dose. Individual doses were calculated using the latest body weight. On day 27, 16 hour mean blood glucose levels were assessed under normal feeding conditions. Fasted (4 hours) mice were injected intraperitoneally with 1g/kg glucose on day 28. After glucose injection, a plasma glucose curve (expressed in mg/dL) was recorded every minute for up to 3 hours.
Intraperitoneal glucose tolerance test (IPGTT) -on the morning of the IGPTT day (day 28), 2-hour fasted animals were treated with vehicle or HBD fragments. Glucose solution (vehicle or the peptide shown as SEQ ID NO:73(C18:0-HLGLEEPKK) was administered 2 hours + -15 minutes after dosing, and blood glucose was monitored from 10 minutes before fasting (fasting state) to 3 hours after glucose challenge food was re-administered 4 hours after glucose challenge and the second treatment of the day (HBD fragment or vehicle) was performed 2 hours after food re-administration.
The results shown in fig. 2 and fig. 3A-3B indicate that HBD1 fragment SEQ ID NO:73 ameliorated glucose intolerance in a dose-dependent manner in glucose telemetered ob/ob mice, a mouse model of leptin deficiency leading to insulin resistance and glucose intolerance. Figure 2 shows that the test peptides reduced fasting blood glucose levels and glucose excursions following IPGTT after 4 weeks of administration. Significant effects were observed at a dose of 3 mg/kg. Figures 3A-3B also show a positive effect on glucose control, as the test peptides were able to significantly reduce the 16 hour mean blood glucose levels of these mice that exhibited severe hyperglycemia at baseline.
Example 3: effect of HBD1 peptide on glucose uptake by adipocytes in vitro
To further test the effect of the HBD1 peptide on glucose metabolism, the ability of the HBD1 peptide to increase glucose uptake by cultured, fully differentiated 3T3-LI adipocytes was tested. 3T3-LI cells are a mouse fibroblast cell line that differentiate into adipocytes when cultured under specific conditions.
Differentiation of 3T3-LI cells into adipocytes was achieved using the following protocol. 3T3-L1 cells were seeded in 24-well plates and cultured in 3T3-L1 maintenance medium (DMEM with 10% fetal bovine serum, 4mM L-glutamine, 1mM sodium pyruvate) until the cells were 100% confluent. 3T3-L1 maintenance medium was then added to the cells and cultured for an additional 48 hours. To begin differentiation into adipocytes, the medium was changed to differentiation medium 1 (DMEM containing 10% fetal bovine serum, 4mM L-glutamine, 1mM sodium pyruvate, 0.5mM IBMX, 0.25mM dexamethasone 1mg/ml insulin) and culture was continued for 2 days. The medium was then changed to differentiation medium 2 (DMEM containing 10% fetal bovine serum, 4mM L-glutamine, 1mM sodium pyruvate, 1mg/ml insulin) and culturing was continued for 2 days. The medium was then changed to adipocyte maintenance medium (DMEM containing 10% fetal bovine serum, 4mM L-glutamine, 1mM sodium pyruvate), and culture was continued for 7 days. During this period, the medium was changed every other day. Fully differentiated adipocytes are now used for glucose uptake experiments (day 11 from the start of differentiation). Stock solutions of the HBD1 peptide to be tested were prepared by dilution under sterile conditions in a laminar flow cabinet with 0.9% NaCl solution to a concentration of 1mg/ml (based on the net peptide content). The solution was homogenized by gentle inversion. The test solutions were prepared from the stock solutions and the remaining stock solutions were aliquoted and stored at-20 ℃ for use without repeated freeze-thaw cycles.
Glucose uptake experiments were performed using the following protocol. Prior to the start of the experiment, 100ml of Krebs bicarbonate buffer (KRBB) (25mM Hepes pH 7.4, 118mM NaCl, 5mM NaHCO) was added3、4.7mM KCl，1.2mM KH2PO4、1.2mM MgSO4、2.5mM CaCl20.2% BSA-filtered using a 0.2-M filter) and 100ml incubation medium (DMEM with 4mM L-glutamine, 1mM sodium pyruvate, 1% penicillin-streptomycin, 0.2% BSA-filtered using a 0.2M-filter) were pre-warmed to 37 deg.C and 500 ml KRBB was cooled on ice. Stock solutions of test compounds were diluted to a final concentration of 3 μ concentration in pre-warmed incubation medium and pre-warmed KRBB. Insulin (positive control) diluted 1:1000 in sterile 0.9% NaCl was further diluted in 10ml of medium and buffer in advance to a final concentration of 1 nM. All traces of medium were carefully removed from the cells using a fine tip. 1ml of incubation medium containing the test compound or vehicle was added to the appropriate wells. No insulin was added at this time.The plates were incubated at 37 ℃ for 24 hours. At the end of the incubation period, the medium was removed from the wells and the cells in the appropriate wells were washed with pre-warmed KRBB containing the appropriate test substance or vehicle, incubated at 300. The wash buffer was then removed from the cells in the appropriate wells and replaced with 270 removed preheated KRBB containing the test substance, vehicle or insulin, and incubation continued for 20 minutes at 37 ℃. During incubation, a mixture of 10x 2-deoxyglucose was prepared as follows: 985. mu.8 KRBB, 10. mu.l 10 mM 2-deoxyglucose, 5. mu.O [3H ]]2-deoxyglucose (1 mCi/ml). At the end of the 20 min incubation period, 30 of the incubated 10X 2-deoxyglucose mixture was added to all wells and incubated for a further 10 min at 37 ℃. The buffer solution was removed from the wells and the cells were washed 3 times with 1ml ice-cold KRBB. To all wells 100. mu.0 of 0.5N NaOH was added and incubated at room temperature for 30 min. The cell lysate obtained at 50. mu.0 was transferred to a white 96-well plate. Add 200. mu.0 Microscint 20 to all wells, cover the coverslips, and shake for 30 min at room temperature. Determining the value of each well by scintillation counting3H]Quantification of 2-deoxyglucose content.
The following HBD1 peptides were tested in the assay: 1(KHHLGLEEPKKLR), 10(HLGLEEPKK), 16(HHLGLEEPKK) and 73(C18:0-HLGLEEPKK) to determine the effect on glucose uptake by 3T3-LI adipocytes. The results of glucose uptake after incubation of differentiated 3T3-LI adipocytes with HBD1 peptide are shown in FIG. 4. In summary, all of the tested HBD1 peptides stimulated an increase in glucose uptake by 3T3-LI adipocytes.
Example 4: demonstrates the effect of HBD1 peptide on glucose uptake by skeletal muscle cells in vitro and demonstrates that HBD1 peptide utilizes the same receptors and mechanisms as IGFBP2 to increase glucose uptake
Previous studies have shown that insulin-like growth factor 2(IGFBP2) activates the Akt and AMPK pathways via cell surface receptors, receptor-type protein tyrosine phosphatase-beta (RPTP beta), thereby increasing glucose uptake (Assefa et al 2017). The following study was performed to determine whether the HBD1 peptide utilized the same receptor and transduction pathway to increase glucose uptake. Studies were performed using cultured, fully differentiated C2C12 mouse skeletal muscle myotubes. Cells were prepared by culturing C2C12 cells to confluent density in 24-well plates using DMEM containing 25mM glucose and 10% fetal bovine serum. At this time, the medium was changed to a differentiation medium (DMEM containing 25mM glucose and 2% horse serum) for 6 days, and the medium was changed every three days. Each treatment was diluted in serum-free medium and, after washing the cells with serum-free medium, added to the cells and incubated for 2 hours or other time depending on the treatment method. At the end of the incubation period, the medium was removed and 1.0ml of glucose-free krebsiella bicarbonate buffer (pH 7.4) containing the same treatment was added and incubation continued for 10 minutes. At the end of the 10 min incubation period, 3H-2-deoxyglucose (0.5 mCi/well) (specific activity ═ 8Ci/mmole) was added directly to all wells and incubation was continued for 10 min. The wells were then washed 3 times with ice-cold phosphate buffered saline, the cells were extracted with 0.5N NaOH, and the 3H-2-deoxyglucose content of the cell lysates was quantified by scintillation counting.
Cells were prepared for signaling studies in the same manner except that 6-well plates were used. After 6 days of incubation in differentiation medium, the cells were washed with serum-free medium. The treatments were then added to serum free medium containing 0.1% BSA. HBD1 peptide was added and incubated for 8 hours. When IGF-1 was used, incubation was for 15 minutes after IGF-1 was added. After incubation, cells were lysed in RIPA buffer and sonicated. The cell lysates were centrifuged and the supernatants were analyzed for Akt or AMPK by SDS PAGE using a 10% gel, followed by immunoblotting with the appropriate antibodies.
When tested for the ability to increase glucose uptake by fully differentiated C2C12 mouse skeletal muscle myotubes, the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) stimulated an increase in glucose uptake in both a dose-dependent and a time-dependent manner compared to vehicle-treated controls (fig. 5A-5B). In addition, the addition of the HBD1 peptide of SEQ ID NO:73(C18:0-HLGLEEPKK) that binds to insulin produced a cumulative increase in glucose uptake (FIG. 5C).
To detect the intracellular transduction pathway utilized by the HBD1 peptide, after treatment with the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK), cell lysate proteins were separated by SDS PAGE and immunoblotted with anti-Akt pS473 antibody. It was observed that HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) induced a dose-related increase in phosphorylated Akt (FIG. 6). The detection of phosphorylated Akt was completely abolished by treatment with an anti-fibronectin antibody (FN3), which has been shown to prevent interaction with RPTP β receptors, and has previously been shown to block the interaction of IGFBP2 with RPTP β (Shen et al 2012).
To further examine the intracellular transduction pathway utilized by the HBD1 peptide, after treatment with the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK), cell lysate proteins were separated by SDS PAGE and immunoblotted with anti-pAMPK T172. It was observed that treatment with the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) resulted in a dose-dependent increase in phosphorylated AMPK (FIG. 7). The detection of phosphorylated AMPK was completely abolished by treatment with anti-fibronectin antibody (FN3) which has been shown to prevent interaction with RPTP β receptors and previously shown to block IGFBP2 interaction with RPTP β (Shen et al 2012), or with compound C, a specific inhibitor of AMPK activation, which has also been shown to block IGFBP2 from stimulating glucose uptake by cultured adipocytes (Assefa et al 2017).
In separate experiments, it was again demonstrated that treatment with HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) increased glucose uptake by fully differentiated mouse skeletal muscle myotubes, as well as the additive effect with insulin (FIG. 8). To be consistent with the observed effects of intracellular transduction pathways, treatment with anti-fibronectin antibody (FN3), which has been shown to prevent interaction with RPTP β receptors and has previously been shown to block IGFBP2 interaction with RPTP β (Shen et al 2012), or compound C (a specific inhibitor of AMPK activation), which has also been shown to block glucose uptake by IGFBP 2-stimulated cultured adipocytes (Assefa et al 2017), completely abolished the ability of the HBD1 peptide SEQ ID NO:73(C18:0-HLGLEEPKK) to increase glucose uptake, either alone or in combination with insulin, was used.
In general, the data presented herein establish the potential of HBD1, HBD1 fragments and analogs thereof in regulating glucose metabolism, insulin metabolism, and leptin metabolism. The mechanism of action of HBD1 on osteoblast differentiation and glucose uptake is similar, as they share the same receptor (RPTP β) and the same intracellular pathway (Akt). It is therefore expected that HBD1 analogues that show efficacy in osteoblast differentiation (according to osteoblast differentiation assays previously reported in e.g. WO 2018/145006) will also be effective on glucose metabolism.
It should be understood that the data reported in this specification are given solely for the purpose of illustrating the present disclosure and are not to be considered as constituting limitations thereof.
While the present disclosure has been described in connection with specific embodiments thereof, it will be understood that it is capable of further modifications and this application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains and as may be applied to the essential features hereinbefore set forth and as follows in the scope of the appended claims.
Incorporation by reference
All references cited in this specification, and their references, are incorporated herein by reference in their entirety for the purpose of teaching additional or alternative details, features, and/or technical background, where appropriate.
Equivalent substitution
While the present disclosure has been particularly shown and described with reference to particular embodiments, it will be appreciated that variations of the above-disclosed and additional features and functions, or alternatives thereof, may be desirably combined into many other different systems or applications. Also that various presently unforeseen or unanticipated alternatives, modifications, variations or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following embodiments.
Reference to the literature
-WO 005/014635；
-U.S.Pat.No.9,220,746；
-PCT/US2018/16869
-Xi G.et al.The Heparin-Binding Domains of IGFBP-2Mediate Its Inhibitory Effect on Preadipocyte Differentiation and Fat Development in Male Mice.Endocrinology,154(11):4146–4157(2013).
-Poster 0268by Xi et al.presented at the Annual Meeting of the American Society for Bone and Mineral Research(ASBMR)in Atlanta on September 16-19,2016.A unique peptide containing the heparin binding domain of IGFBP-2increases bone mass in ovariectomized(OVX)rats.
-Wheatcroft SB,Kearney MT,Shah AM,Ezzat VA,Miell JR,Modo M,Williams SC,Cawthorn WP,Medina-Gomez G,Vidal-Puig A,Sethi JK,Crossey PA.IGF-binding protein-2protects against the development of obesity and insulin resistance.Diabetes.2007；56(2):285–294.
-DeMambro VE,Clemmons DR,Horton LG,et al.Gender-specific changes in bone turnover and skeletal architecture in igfbp-2-null mice.Endocrinology.2008；149(5):2051–2061.
-Hedbacker K,Birsoy K,Wysocki RW,et al.Antidiabetic effects of IGFBP2,a leptin-regulated gene.Cell Metab.2010；11(1):11–22.
-Xi,G.et al.(2014)IGFBP-2directly stimulates osteoblast differentiation.J.Bone Miner.Res.20,2427–2438
-Kawai M,Breggia AC,DeMambro VE,et al.The heparin binding domain of IGFBP-2has insulin-like growth factor binding-independent biologic activity in the growing skeleton.J Biol Chem.2011；286(16):14670–80.
-Shen X,Xi G,Maile LA,et al.Insulin-like growth factor(IGF)binding protein 2functions coordinately with receptor protein tyrosine phosphatase B and the IGF-I receptor to regulate IGF-I-stimulated signaling.Mol Cell Biol.2012；32(20):4116-30.
-Assefa B,Mahmoud AM,Pfeiffer AFH,et al.Insulin-Like Growth Factor(IGF)BindingProtein-2,Independently of IGF-1,Induces GLUT-4 Translocation and Glucose Uptake in 3T3-L1 Adipocytes.Oxid Med Cell Longev.2017；2017:3035184.
SEQUENCE LISTING
<110> Amolit pharmaceutical Co
<120> use of heparin binding domain of IGFBP-2 in the treatment of metabolic disorders
<130> P20116213WP
<150> US 62/676,087
<151> 2018-05-24
<160> 113
<170> PatentIn version 3.5
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<400> 25
His Leu Gly Leu Glu Glu Pro Lys Ala
1 5
<210> 26
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 26
His Leu Gly Leu Glu Arg Pro Lys Lys
1 5
<210> 27
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 27
His Leu Gly Leu Glu Phe Pro Lys Lys
1 5
<210> 28
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 28
His Leu Gly Leu Glu Ile Pro Lys Lys
1 5
<210> 29
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 29
His Leu Gly Leu Glu Pro Pro Lys Lys
1 5
<210> 30
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 30
His Leu Gly Leu Glu Ser Pro Lys Lys
1 5
<210> 31
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 31
His Leu Gly Leu Glu Glu Arg Lys Lys
1 5
<210> 32
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 32
His Leu Gly Leu Glu Glu Phe Lys Lys
1 5
<210> 33
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 33
His Leu Gly Leu Glu Glu Leu Lys Lys
1 5
<210> 34
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 34
His Leu Gly Leu Glu Glu Ser Lys Lys
1 5
<210> 35
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 35
His Leu Gly Leu Glu Glu Asp Lys Lys
1 5
<210> 36
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 36
His Leu Gly Leu Glu Glu Pro Phe Lys
1 5
<210> 37
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 37
His Leu Gly Leu Glu Glu Pro Pro Lys
1 5
<210> 38
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 38
His Leu Gly Leu Glu Glu Pro Ser Lys
1 5
<210> 39
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 39
His Leu Gly Leu Glu Glu Pro Asp Lys
1 5
<210> 40
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 40
His Leu Gly Leu Glu Glu Pro Lys Phe
1 5
<210> 41
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 41
His Leu Gly Leu Glu Glu Pro Lys Ile
1 5
<210> 42
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 42
His Leu Gly Leu Glu Glu Pro Lys Pro
1 5
<210> 43
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 43
His Leu Gly Leu Glu Glu Pro Lys Ser
1 5
<210> 44
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 44
His Leu Gly Leu Glu Glu Pro Lys Asp
1 5
<210> 45
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 45
His Leu Gly Leu Glu Glu Pro Ile Lys
1 5
<210> 46
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 46
His Leu Gly Leu Glu Glu Pro Val Lys
1 5
<210> 47
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 47
His Leu Gly Leu Glu Glu Pro Gln Lys
1 5
<210> 48
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 48
His Leu Gly Leu Glu Glu Pro Thr Lys
1 5
<210> 49
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 49
His Leu Gly Leu Glu Glu Pro Glu Lys
1 5
<210> 50
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 50
His Leu Gly Leu Glu Glu Pro Lys His
1 5
<210> 51
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 51
His Leu Gly Leu Glu Glu Pro Lys Arg
1 5
<210> 52
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 52
His Leu Gly Leu Glu Glu Pro Lys Leu
1 5
<210> 53
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 53
His Leu Gly Leu Glu Glu Pro Lys Met
1 5
<210> 54
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 54
His Leu Gly Leu Glu Glu Pro Lys Trp
1 5
<210> 55
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 55
His Leu Gly Leu Glu Glu Pro Lys Val
1 5
<210> 56
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 56
His Leu Gly Leu Glu Glu Pro Lys Gln
1 5
<210> 57
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 57
His Leu Gly Leu Glu Glu Pro Lys Asn
1 5
<210> 58
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 58
His Leu Gly Leu Glu Glu Pro Lys Tyr
1 5
<210> 59
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 59
His Leu Gly Leu Glu Glu Pro Lys Thr
1 5
<210> 60
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 60
His Leu Gly Leu Glu Glu Pro Lys Glu
1 5
<210> 61
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 61
His Leu Gly Leu Glu Glu Pro Ser Pro
1 5
<210> 62
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 62
His Leu Gly Leu Glu Glu Pro Ser Ser
1 5
<210> 63
<211> 13
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<220>
<221> MOD_RES
<222> (1)..(1)
<223> Pegylation
<400> 63
Lys His His Leu Gly Leu Glu Glu Pro Lys Lys Leu Arg
1 5 10
<210> 64
<211> 13
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (13)..(13)
<223> Pegylation
<400> 64
Lys His His Leu Gly Leu Glu Glu Pro Lys Lys Leu Arg
1 5 10
<210> 65
<211> 10
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> Pegylation
<400> 65
His His Leu Gly Leu Glu Glu Pro Lys Lys
1 5 10
<210> 66
<211> 10
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (10)..(10)
<223> Pegylation
<400> 66
His His Leu Gly Leu Glu Glu Pro Lys Lys
1 5 10
<210> 67
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> Pegylation
<400> 67
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 68
<211> 10
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C16:0
<400> 68
His His Leu Gly Leu Glu Glu Pro Lys Lys
1 5 10
<210> 69
<211> 10
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C18:0
<400> 69
His His Leu Gly Leu Glu Glu Pro Lys Lys
1 5 10
<210> 70
<211> 10
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C20:0
<400> 70
His His Leu Gly Leu Glu Glu Pro Lys Lys
1 5 10
<210> 71
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C14:0
<400> 71
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 72
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C16:0
<400> 72
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 73
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C18:0
<400> 73
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 74
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C20:0
<400> 74
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 75
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> diacylation with C16:0
<400> 75
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 76
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (9)..(9)
<223> acylation with C16:0
<400> 76
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 77
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MISC_FEATURE
<222> (1)..(9)
<223> Cyclic peptide
<400> 77
His Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 78
<211> 13
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<220>
<221> MOD_RES
<222> (1)..(1)
<223> acylation with C16:0
<400> 78
Lys His His Leu Gly Leu Glu Glu Pro Lys Lys Leu Arg
1 5 10
<210> 79
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 79
Gly Leu Glu Glu Pro Leu
1 5
<210> 80
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 80
Gly Leu Glu Glu Pro Arg
1 5
<210> 81
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 81
Gly Leu Asp Glu Pro Lys
1 5
<210> 82
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 82
Gly Leu Glu Asp Pro Lys
1 5
<210> 83
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 83
Gly Gly Glu Glu Pro Lys
1 5
<210> 84
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 84
Gly Val Glu Glu Pro Lys
1 5
<210> 85
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 85
Gly Ile Glu Glu Pro Lys
1 5
<210> 86
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 86
Val Leu Glu Glu Pro Lys
1 5
<210> 87
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 87
Leu Leu Glu Glu Pro Lys
1 5
<210> 88
<211> 6
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 88
Ile Leu Glu Glu Pro Lys
1 5
<210> 89
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 89
Lys Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 90
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 90
His Val Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 91
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 91
His Leu Pro Leu Glu Glu Pro Lys Lys
1 5
<210> 92
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 92
His Leu Gly Ile Glu Glu Pro Lys Lys
1 5
<210> 93
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 93
Asn Leu Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 94
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 94
His Thr Gly Leu Glu Glu Pro Lys Lys
1 5
<210> 95
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 95
His Leu Lys Leu Glu Glu Pro Lys Lys
1 5
<210> 96
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 96
His Leu Gly Ser Glu Glu Pro Lys Lys
1 5
<210> 97
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 97
His Leu Gly Leu Glu Glu Pro Tyr Lys
1 5
<210> 98
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 98
His Leu Gly Leu Glu Glu Pro Gln Lys
1 5
<210> 99
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 99
His Leu Gly Leu Glu Glu Pro Asn Lys
1 5
<210> 100
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 100
His Leu Gly Leu Glu Glu Pro Ser Phe
1 5
<210> 101
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 101
His Leu Gly Leu Glu Glu Pro Ser Val
1 5
<210> 102
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 102
His Leu Gly Leu Glu Glu Pro Leu Met
1 5
<210> 103
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 103
His Leu Gly Leu Glu Glu Pro Leu Tyr
1 5
<210> 104
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 104
His Leu Gly Leu Glu Glu Pro Leu Asn
1 5
<210> 105
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 105
His Leu Gly Leu Glu Glu Pro Leu Gln
1 5
<210> 106
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 106
His Leu Gly Leu Glu Glu Pro Phe Val
1 5
<210> 107
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 107
His Leu Gly Leu Glu Glu Pro Phe Gln
1 5
<210> 108
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 108
His Leu Gly Leu Glu Glu Pro Phe Asn
1 5
<210> 109
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 109
His Leu Gly Leu Glu Glu Pro Val Met
1 5
<210> 110
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 110
His Leu Gly Leu Glu Glu Pro Val Asn
1 5
<210> 111
<211> 9
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 111
His Leu Gly Leu Glu Glu Pro Met Lys
1 5
<210> 112
<211> 8
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 112
His Leu Gly Leu Glu Glu Pro Arg
1 5
<210> 113
<211> 8
<212> PRT
<213> Artificial Sequence
<220>
<223> synthetic
<400> 113
His Leu Gly Leu Glu Glu Pro His
1 5
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