阅读说明：本技术 器官纤维化的预防和治疗 (Prevention and treatment of organ fibrosis ) 是由 R·西尔弗 于 2019-01-09 设计创作，主要内容包括：本公开提供了一种治疗器官纤维化的方法,所述方法包括向罹患器官纤维化的患者施用c-P4H抑制剂以抵抗病理性纤维化。c-P4H抑制剂可通过各种途径施用,包括使用喷雾器以气雾化状态施用、静脉内注射、腹膜内注射或皮下注射。(The present disclosure provides a method of treating organ fibrosis, the method comprising administering to a patient suffering from organ fibrosis an inhibitor of c-P4H to combat pathological fibrosis. The c-P4H inhibitor can be administered by various routes including administration in an aerosolized state using a nebulizer, intravenous injection, intraperitoneal injection, or subcutaneous injection.)

1. A method of treating organ fibrosis in a patient in need of such treatment, the method comprising administering to the patient an effective amount of a collagen prolyl-4-hydroxylase (c-P4H) inhibitor.

2. The method of claim 1, wherein the organ is selected from the group consisting of: lung, kidney and liver.

3. The method of claim 1, wherein said c-P4H inhibitor is administered intermittently.

4. The method of claim 3, wherein the c-P4H inhibitor is administered every other day, every third day, every fifth day, or once a week.

5. The method of claim 3, wherein the c-P4H inhibitor is administered hourly, every two hours, every three hours, every six hours, or every twelve hours.

6. The method of claim 1, wherein the c-P4H inhibitor is administered by intravenous (i.v.) injection, intraperitoneal (i.p.) injection, subcutaneous (s.c.) injection, or aerosolized delivery.

7. The method of claim 1, wherein the c-P4H inhibitor is a small molecule inhibitor.

8. The method of claim 7, wherein the small molecule inhibitor of c-P4H is a Prolyl Hydroxylase Domain (PHD) inhibitor.

9. The method of claim 8, wherein the PHD inhibitor specifically inhibits the activity of c-P4H.

10. The method of claim 8, wherein the PHD inhibitor is selected from the group consisting of: rosemastat (RXD) (FG-4592), Kodosetat (AKB-6548), dapoxetol (GSK-1278863), and Molipstat (BAY 85-3934).

11. The method of claim 8, wherein the PHD inhibitor has the following chemical structure

Wherein:

r1 is selected from the group consisting of: hydroxy, alkoxy, substituted alkoxy, aryloxy, and substituted aryloxy;

r2 and R3 are independently selected from the group consisting of: hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heterocycloalkyl, substituted heterocycloalkyl, heteroaryl, and substituted heteroaryl; or R2 and R3 together with the carbon atom to which they are attached form cycloalkyl, substituted cycloalkyl, heterocycloalkyl, or substituted heterocycloalkyl;

r4 is selected from the group consisting of: hydrogen, alkyl and substituted alkyl;

r5 is selected from the group consisting of: hydroxy, alkoxy, and substituted alkoxy;

r6 is selected from the group consisting of: hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, cyano, halogen, hydroxy, alkoxy, substituted alkoxy, amino, substituted amino, arylozy, substituted arylozy, aminoacyl, substituted aminoacyl, cycloalkoxy, substituted cycloalkoxy, aryl, substituted aryl, aryloxy, substituted aryloxy, heterocycloalkyl, substituted heterocycloalkyl, heteroaryloxy, substituted heteroaryloxy, heteroaryl, and substituted heteroaryl; and is

R7, R8, R9 and R10 are independently selected from the group consisting of: hydrogen, halogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, alkoxy, substituted alkoxy, aryloxy, and substituted aryloxy.

12. The method of claim 11, wherein R6 is alkyl.

13. The method of claim 12, wherein the alkyl group is methyl.

14. The method of claim 11, wherein R5 is hydroxyl.

15. The method of claim 11, wherein R8 is aryloxy.

16. The method of claim 11, wherein R6 is methyl and R5 is hydroxy.

17. The method of claim 11, wherein the PHD inhibitor is FG-4592, wherein the FG-4592 has the chemical name of N- [ (4-hydroxy-1-methyl-7-phenoxyisoquinolin-3-yl) carbonyl ] glycine) ] and the chemical structure:

rosemastat (FG-4592).

18. The method of claim 11, wherein the PHD inhibitor is administered in an amount between 0.2mg/kg and 20 mg/kg.

19. The method of claim 11, wherein the PHD inhibitor is administered in an amount between 50mg/kg and 200 mg/kg.

20. The method of claim 8, wherein the PHD inhibitor is a 2-oxoglutarate analog.

21. The method of claim 20, wherein the 2-oxoglutarate analog is Dimethyloxalylglycine (DMOG), wherein the DMOG has the chemical name of N- (2-methoxy-2-oxoacetyl) glycine methyl ester) and the following chemical structure:

dimethyloxalylglycine (DMOG).

22. The method of claim 21, wherein the DMOG is administered in an amount between 50mg/kg and 200 mg/kg.

23. The method of claim 1, wherein the inhibition of the activity of the c-P4H enzyme is achieved by a method selected from the group consisting of: introduction of nucleic acid inhibitors, CRISPR/Cas systems, Cre/Lox systems, TALEN systems and homologous recombination.

24. The method of claim 18, wherein the nucleic acid inhibitor is selected from the group consisting of: antisense RNA, small interfering RNA, RNAi micro RNA, artificial micro RNA and ribonuclease.

25. An expression vector comprising a nucleotide sequence operably linked to a regulatory region functional in a cell that is transcribed into a nucleic acid inhibitor of c-P4H gene expression, wherein the nucleic acid is selected from the group consisting of: antisense RNA, small interfering RNA, RNAi micro RNA, artificial micro RNA and ribonuclease.

26. The expression vector of claim 25, wherein the regulatory region comprises an inducible promoter, a tissue-specific promoter, or an organ-specific promoter.

27. The expression vector of claim 26, wherein the organ-specific promoter is selected from the group consisting of: lung-specific promoters, kidney-specific promoters and liver-specific promoters.

Background

Fibrosis is estimated to cause about 45% of deaths in developed countries. Fibrosis, defined as abnormal or excessive accumulation of extracellular matrix, particularly fibrillar collagen, is a key driver of progressive sexual organ dysfunction in a number of inflammatory and metabolic diseases, including idiopathic pulmonary fibrosis, liver disease and kidney disease. These conditions are still not well treated. There are few effective therapies and fewer therapies that specifically target fibrosis. This highlights the need for an in-depth understanding of the pathogenesis of fibrosis development and translates this knowledge into novel treatments.

Pulmonary fibrosis is scarring of lung tissue and Idiopathic Pulmonary Fibrosis (IPF), which belongs to a large group of over two hundred lung diseases characterized by involvement of the pulmonary interstitium, defined as a particular form of chronic, progressive, irreversible fibrotic interstitial pneumonia of unknown origin that occurs in older adults. In the united states, there are 100,000 people with idiopathic pulmonary disease and over 42,000 elderly people 65 years old and older are diagnosed with IPF each year. The clinical course is described as dyspnea and progressive deterioration of lung function and is accompanied by a poor prognosis. Treatment options are limited to stopping disease progression and oxygen supplementation to improve symptoms and organ function. The clinical course of IPF involves acute exacerbations, often requiring hospitalization.

Inflammation is a key to the development of pulmonary fibrosis, and inflammatory cells, including mast cells, are abundant in pulmonary fibrosis. Clinically, the correlation between the severity of pulmonary fibrosis and the number of mast cells has been well documented. Previous studies in murine models of pulmonary fibrosis have shown that mast cells play an important role in pathological collagen deposition. In the lung, mast cells are found in close proximity to fibroblasts, which are cells that cause collagen synthesis and secretion. Mast cell mediators can cause fibrosis to occur and stimulate collagen synthesis in human lung fibroblasts.

Assembly of collagen into its mature triple-helical form requires prolyl hydroxylation whereby proline residues in procollagen are converted to hydroxyproline. Collagen prolyl-4-hydroxylase (c-P4H) is the enzyme responsible for prolyl hydroxylation. The c-P4H enzyme is a member of the 2-oxoglutarate (2-OG) -dependent dioxygenase superfamily, having an Fe (II) atom at the active site and requiring oxygen and 2-OG as co-substrates. The catalytically active form of the c-P4H enzyme is the alpha-2 beta-2 tetramer, which catalyzes the post-translational formation of hydroxyproline in collagen.

Another group of prolyl 4-hydroxylases are the Prolyl Hydroxylase Domain (PHD) enzymes associated with Hypoxia Inducible Factor (HIF). The HIF PHD enzymes are structurally related to c-P4H and also belong to the 2-OG-dependent dioxygenase superfamily. Examples of hifpthd antagonists are numerous, which act as competitive inhibitors due to their structural similarity to 2-OG. These inhibitors are useful as competitive antagonists of 2-OG, which acts as a cofactor and accepts one oxygen from molecular oxygen to become succinate, when the second oxygen forms trans-4-hydroxyproline.

Summary of The Invention

In one aspect, the present disclosure provides a method of treating organ fibrosis in a patient in need of such treatment, the method comprising administering to the patient an effective amount of a collagen prolyl-4-hydroxylase (c-P4H) inhibitor. In some embodiments, the organ is selected from the group consisting of: lung, kidney and liver.

In some embodiments, the c-P4H inhibitor is administered intermittently.

In some embodiments, the c-P4H inhibitor is administered every other day, every third day, every fifth day, or once a week. In some embodiments, the c-P4H inhibitor is administered every hour, every two hours, every three hours, every six hours, or every twelve hours.

In some embodiments, the c-P4H inhibitor is administered by intravenous (i.v.) injection, intraperitoneal (i.p.) injection, subcutaneous (s.c.) injection, or aerosolized delivery.

In some embodiments, the c-P4H inhibitor is a small molecule inhibitor. In some embodiments, the small molecule inhibitor of c-P4H is a Prolyl Hydroxylase Domain (PHD) inhibitor. In some embodiments, the PHD inhibitor specifically inhibits the activity of c-P4H.

In some embodiments, wherein the PHD inhibitor is selected from the group consisting of: rosesartat (RXD) (FG-4592), Vadadasat (Vadadustat) (AKB-6548), dapstat (Daprodustat) (GSK-1278863) and Moritestat (Molidustat) (BAY 85-3934).

In some embodiments, the PHD inhibitor has the following chemical structure

Wherein:

r1 is selected from the group consisting of: hydroxy, alkoxy, substituted alkoxy, aryloxy, and substituted aryloxy;

r2 and R3 are independently selected from the group consisting of: hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heterocycloalkyl, substituted heterocycloalkyl, heteroaryl, and substituted heteroaryl; or R2 and R3 together with the carbon atom to which they are attached form cycloalkyl, substituted cycloalkyl, heterocycloalkyl, or substituted heterocycloalkyl;

r4 is selected from the group consisting of: hydrogen, alkyl and substituted alkyl;

r5 is selected from the group consisting of: hydroxy, alkoxy, and substituted alkoxy;

r6 is selected from the group consisting of: hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, cyano, halogen, hydroxy, alkoxy, substituted alkoxy, amino, substituted amino, arylozy, substituted arylozy, aminoacyl, substituted aminoacyl, cycloalkoxy, substituted cycloalkoxy, aryl, substituted aryl, aryloxy, substituted aryloxy, heterocycloalkyl, substituted heterocycloalkyl, heteroaryloxy, substituted heteroaryloxy, heteroaryl, and substituted heteroaryl; and is

R7, R8, R9 and R10 are independently selected from the group consisting of: hydrogen, halogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, alkoxy, substituted alkoxy, aryloxy, and substituted aryloxy.

In some embodiments, R6 is alkyl. In another embodiment, the alkyl at R6 is methyl.

In some embodiments, R5 is hydroxy.

In some embodiments, R8 is aryloxy.

In some embodiments, wherein R6 is methyl and R5 is hydroxy.

In a particular embodiment, the PHD inhibitor is FG-4592, wherein said FG-4592 has the chemical name of N- [ (4-hydroxy-1-methyl-7-phenoxyisoquinolin-3-yl) carbonyl ] glycine) ] and the following chemical structure:

in some embodiments, the PHD inhibitor is administered in an amount between 0.2mg/kg and 20 mg/kg. In some embodiments, the PHD inhibitor is administered in an amount between 50mg/kg and 200 mg/kg.

In some embodiments, the PHD inhibitor is a 2-oxoglutarate analog.

In a particular embodiment, the 2-oxoglutarate analog is Dimethyloxalylglycine (DMOG), wherein the DMOG has the chemical name of N- (2-methoxy-2-oxoacetyl) glycine methyl ester) and the following chemical structure:

in some embodiments, the DMOG is administered in an amount between 50mg/kg and 200 mg/kg.

In some embodiments, the inhibition of the activity of the c-P4H enzyme is achieved by a method selected from the group consisting of: introduction of nucleic acid inhibitors, CRISPR/Cas systems, Cre/Lox systems, TALEN systems and homologous recombination.

In some embodiments, the nucleic acid inhibitor is selected from the group consisting of: antisense RNA, small interfering RNA, RNAi micro RNA, artificial micro RNA and ribonuclease.

Another aspect of the present invention relates to an expression vector comprising a nucleotide sequence operably linked to a regulatory region functional in a cell, said nucleotide sequence being transcribed into a nucleic acid inhibitor of c-P4H gene expression, wherein said nucleic acid is selected from the group consisting of: antisense RNA, small interfering RNA, RNAi micro RNA, artificial micro RNA and ribonuclease.

In some embodiments, the regulatory region comprises an inducible promoter, a tissue-specific promoter, or an organ-specific promoter.

In some embodiments, the organ-specific promoter is selected from the group consisting of: lung-specific promoters, kidney-specific promoters and liver-specific promoters.

Brief Description of Drawings

This patent or application document contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the office upon request and payment of the necessary fee.

Figure 1A-1c.a. uptake of mast cell exosomes labeled with fluorescent dyes by human lung fibroblasts. The fibroblast nuclei were labeled with fluorescent DAPI. Observation was performed at 60 × magnification under transmitted light overlapping the fluorescence signal. B. Mast cells in close proximity to fibroblasts. The electron micrograph shows the relationship between Mast Cells (MC), Fibroblasts (FB), collagen (col) and blood vessels (bv), 7,500X. C. Exosomes (EXO) induce collagen synthesis and secretion by Human Lung Fibroblasts (HLF). HLF cells were co-cultured with EXO (40. mu.g/ml) and supernatants were collected after 24, 48 and 72 hours for measurement of newly secreted collagen. Total protein/well was quantified using cell lysates for normalization. Data are mean ± SEM of three independent experiments (n ═ 3), each point was run in triplicate. P <0.05, P <0.01, P < 0.001.

Figure 2A-2c.a. effect of TGF- β 1(10ng/ml) ± treatment with a combination of TGF β R1 inhibitor SB543554(1 μ M) on Human Lung Fibroblast (HLF) collagen secretion after 24, 48 and 72 hours. Total protein/well was quantified using cell lysates for normalization. Data are mean ± SEM of three independent experiments (n ═ 3), each point was run in triplicate. P < 0.05. Effects of combined treatment of TGF- β 1(10ng/ml) or Exosome (EXO) (40 μ g/ml). + -. TGF- β R1 inhibition. Total protein/well was quantified using cell lysates for normalization. Data are mean ± SEM of three independent experiments (n ═ 3), each point was run in triplicate. P <0.05, P < 0.01. C. Western blots of Human Lung Fibroblast (HLF) homogenates probed for phosphorylated and non-phosphorylated Smad2 and Smad3, typical TGF-b signaling mediators. Cell lysates were prepared after 24 hours of treatment with TGF β 1(10ng/ml) or Exosomes (EXO) (40 μ g/ml). GAPDH was used as a housekeeping gene.

3A-3E A Rosesartal (RXD) as an inhibitor of HIF PHD reduced constitutive, TGF- β -induced, and Exosome (EXO) -induced collagen secretion in human lung fibroblasts. Human lung fibroblasts were exposed to TGF-. beta.s (10ng/ml) or co-cultured with EXO (40. mu.g/ml), and the supernatant was collected for measurement of newly secreted collagen. RXD was used at 10. mu.g/ml. Total protein/well was quantified using cell lysates for normalization. Data are mean ± SEM of three independent experiments (n ═ 3), each point was run in triplicate. P <0.05, P <0.001, P < 0.0001. B. Rxd prevents fibroblast migration/accumulation/foci observed with TGF- β. Representative images of human lung fibroblasts in transwell plates untreated (Con) (B), treated with TGF- β (10ng/ml) (C), or treated with TGF- β + RXD (10mg/ml) (D) and (E) at low magnification. RXD decreases Smooth Muscle Actin (SMA) abundance in human lung fibroblasts.

FIG. 4 RXD reduced the relative expression of the c-P4H tetramer (i.e., the catalytically active form of collagen P4H). Human lung fibroblast homogenates were western blotted on a gradient gel under non-denaturing conditions and probed with anti-alpha subunit monomer (60 kD). Tetramer is indicated by an arrow at 240 kD. RXD increased alpha-subunit monomer abundance in all cases (60kD band). RXD was used at 10 mg/ml.

Rxd reduces mast cell degranulation in vitro in response to oxygen supplementation and subsequent indoor air recovery. A. Beta-alreadyGlycosaminoglycases (. beta. -hex) and B. mast cell tryptase were measured in mast cell supernatant at 72 hour time points under timed control (room air (RA)), HO^recDefined as the recovery after 1 day in high oxygen for 2 days in room air, and HO^rec+ RXD is the recovery from addition of PHD inhibitor to the media in which the cells were soaked. RXD was used at 10 mg/ml. P<0.05，***P<0.001, n is 3 experiments. C. In an experimental bleomycin (bleomycin, Bleo) mouse model, RXD was used to reduce the increase in mast cell number observed in pulmonary fibrosis in vivo. P<0.001, normal saline versus bleomycin treatment; p<0.05, bleo vs bleo + RXD. NS is not significant

FIG. 6 is a sketch depicting the pattern of mast cell dependent Fibroblast (FB) activation.

FIG. 7 is a diagram of collagen synthesis. This figure depicts the classical ligand-receptor mediated fibrosis generation pathway as well as other fibrosis generation pathways disclosed in this application. The transforming growth factor beta (TGF-. beta.) pathway is important for almost all types of fibrosis. These pathways lead to nuclear transcription of the fiber gene followed by post-translational modification of the prepro-collagen in the Endoplasmic Reticulum (ER). The other fibrosis-generating pathway may bypass nuclear transcription and directly target the ER, which includes mast cell exosomes as set forth herein. The posttranslational modification of procollagen by c-P4H is the rate-limiting step in the production of procollagen, the collagen precursor.

Fig. 8A-8C stimulation of human fibroblasts increased C-P4H abundance. The immune expression of P4H, a key enzyme in collagen synthesis in human fibroblasts, is shown in a. Nuclei (blue) were stained with DAPI. Scale bar 10 μm.

FIG. 9 Rosemastat inhibited the increase of C-P4H in stimulated human fibroblasts. Immune expression of prolyl-4-hydroxylase (P4H). The relative pixel intensity of P4H immunofluorescence (green) obtained in HLF exposed to TGF- β or mast cell Exosomes (EXO) was significantly higher compared to untreated human fibroblasts. P < 0.001.

10A-10B Rosemastat (RXD) had no effect on fibroblast collagen gene transcripts. HiF prolyl hydroxylase domain inhibitors, such as roxasistat, act at the level of post-translational modification rather than at the level of transcription. Thus, rosxastat did not alter the increase in fiber gene transcripts as does TGF- β inhibition. A. Relative gene expression of collagen 3 under the conditions described. B. Relative gene expression of collagen 1 under the conditions described.

Fig. 11A-11b. murine models of pulmonary fibrosis in vivo. Treatment with rosxastat reduced bleomycin-induced pulmonary fibrosis. Representative micrographs of Masson's trichrome-stained lungs from bleomycin-treated mice at 14 day time points. The Rosesarta reduced fibrosis.

Figure 12. Rosesarta normalizes the bleomycin-induced decrease in lung compliance. Pulmonary function testing demonstrated that Rosxarate (RXD) treatment reduced the decrease in lung compliance associated with bleomycin (Bleo). Sal is a physiological saline vehicle.

Fig. 13A-13b, Rosalastat (RXD) had no effect on lung collagen gene transcripts. Rosxastat did not alter the increase in fiber gene transcripts caused by pulmonary exposure to bleomycin. A. Relative gene expression of collagen 1 under the conditions described. B. Relative gene expression of collagen 3 under the conditions described.

FIG. 14 is a diagram of C-P4H as a druggable target for collagen synthesis. The use of HIF PHD inhibitors, such as rosxastat, interrupts post-translational modification of procollagen in the ER by preventing hydroxylation of proline in the procollagen peptide. Chains that are not hydroxylated sufficiently do not form triple helical domains that are stable at body temperature and therefore undergo degradation.

15A-15D Luoshastat and renal Unilateral Ureteral Obstruction (UUO). All kidney sections were stained with masson trichrome. A. Stained cortex of untreated kidney (RXD-) on day 14 of unilateral ureteral occlusion. B. Stained medulla (RXD-) of untreated kidneys on day 14 of unilateral ureteral obstruction. C. Stained cortex of kidneys (RXD +) treated with rosxastat on day 14 of unilateral ureteral obstruction. D. Stained medulla (RXD +) of kidneys treated with rosxastat on day 14 of unilateral ureteral obstruction.

Fig. 16A-16f treatment with RXD reduces renal fibrosis in UUO. Representative paired cortical and medullary sections of control, UUO and UUO + RXD kidneys stained with masson trichrome (from the same kidney). Collagen stained blue. A. Collagen staining of control renal cortex. Collagen staining of uuo renal cortex. C. Collagen staining of UUO renal medulla treated with RXD. D. Collagen staining of control renal medulla. Collagen staining of uuo renal medulla. F. Collagen staining of UUO renal medulla treated with RXD. Collagen staining was abundant in UUO kidneys (cortex and medulla) compared to control kidney sections (a and D) (B and E). Treatment with RXD reduced fibrosis as seen in the UUO renal cortex and medulla (C and F).

Figure 17.RXD reduces fibrosis in UUO kidneys. Collagen (blue) staining was quantified pixel by pixel in masson trichrome stained fixed kidney sections in multiple high power fields. P <0.0001, cortical UUO vs cortical UUO + RXD; and medullary UUO versus medullary UUO + RXD. There was no significant difference between control cortical and medullary collagen staining in the presence and absence of RXD. N-4 mice/group.

Figure 18A-18e. hlf uptake of MC-EXO stimulates collagen synthesis through a Smad-independent pathway. HLF uptake MC-EXO, labeled with PKH-67 (green). Nuclei were labeled with DAPI (blue). Observed with an inverted epi-fluorescence microscope. Scale bar 15 μ M. B. Confocal images of: I. labeled MC-EXO (CellVue Claret Far Red); HLF transiently transfected with meneon green-KDEL, which is a fluorescent marker for ER; DAPI-labeled HLFs showing nuclei; overlay image showing uptake of MC-EXO in HLF ER (I.II.III). C. Lysates of HLF treated with EXO (40 μ g) and TGF- β (10ng/ml) were collected 72 hours after treatment and RT qPCR was performed to determine the relative gene expression of collagen I and collagen 3 normalized to GAPDH. D. Hydroxyproline content of lysates of HLF incubated with MC-EXO (40. mu.g) or TGF-. beta. (10 ng/ml). E. Secreted collagen was measured in supernatants from HLF, HLF + MC-EXO (40. mu.l), TGF-. beta.10 ng/ml, and HLF + EPI-EXO. Collagen was measured by the Sircol assay. All assays were performed in triplicate. P < 0.01; p <0.001, relative to HLF.

19A-19E in HLF, RXD inhibited proline hydroxylation, hydroxyproline, C-P4H abundance, and secreted collagen. LC-MC analysis of hlf extracted proteins showed that RXD prevents proline hydroxylation in collagen 1 and 3. RXD inhibits TGF-beta induced increases in hydroxyproline in HLF. C. In Western blots, RXD reduced the abundance of C-P4H in HLF lysates + MC-EXO and + TGF β. Actin was operated as a control. RXD inhibited the increase in fluorescence intensity of C-P4H as measured in HLF + MC-EXO and HLF + TGF- β. E. Secretion of collagen (Sircol) in HLF lysates from untreated as well as HLF treated with + MC-EXO and + TGF- β was blocked with RXD. P < 0.05; p < 0.01; p <0.001, P <0.0001, relative to HLF. All assays were performed in triplicate.

Figures 20A-20e. rxd inhibits bleomycin-induced fibrosis in murine lungs. A. The pulmonary hydroxyproline content is significantly reduced in RXD treated bleomycin mice. B. Lung sections stained for collagen deposition with masson trichrome: b ═ saline instilled control mice, C ═ RXD treated saline instilled control mice, D ═ bleomycin instilled mice, E ═ RXD + bleomycin instilled mice. P <0.01, Bleo vs Bleo + RXD. NS is not significant. N-5 mice/group. Scale bar 250 μm.

Detailed Description

One aspect of the present disclosure predicts, at least in part, that modulating the collagen prolyl-4-hydroxylase (c-P4H) pathway for therapeutic purposes may prevent, ameliorate and/or reduce organ fibrosis. The term "preventing" as used herein refers to delaying or eliminating the onset of fibrosis, or reducing the occurrence of fibrosis in a patient population. The present disclosure is based on the following findings: inhibition of the c-P4H enzyme is an effective anti-fibrotic method that prevents the production of newly synthesized collagen without affecting existing collagen.

In some embodiments, the patient suffers from fibrosis of the lung (pulmonary fibrosis), fibrosis of the kidney (renal fibrosis), or fibrosis of the liver (hepatic fibrosis).

In some embodiments, inhibition of c-P4H is achieved by a c-P4H inhibitor.

In one embodiment, the C-P4H inhibitor is not administered to the subject continuously; but is administered intermittently. In a particular embodiment, the intermittent administration of the C-P4H inhibitor is performed every other day, every third day, every fourth day, every fifth day, or once a week. In another particular embodiment, the intermittent administration of the C-P4H inhibitor is performed hourly, every two hours, every three hours, every six hours, every ten hours, or every twelve hours.

In some embodiments, an effective amount of a C-P4H inhibitor is about 0.2mg/kg to 100 mg/kg. In other embodiments, an effective amount of a C-P4H inhibitor is about 0.2mg/kg, 0.5mg/kg, 1mg/kg, 8mg/kg, 10mg/kg, 20mg/kg, 30mg/kg, 40mg/kg, 50mg/kg, 60mg/kg, 70mg/kg, 80mg/kg, 90mg/kg, 100mg/kg, 150mg/kg, 175mg/kg, or 200mg/kg of a C-P4H inhibitor.

In some embodiments, the C-P4H inhibitor is an agent that inhibits C-P4H hydroxylase activity. An agent that inhibits C-P4H hydroxylase activity is any agent that reduces or otherwise modulates C-P4H hydroxylase activity.

In some embodiments, the c-P4H inhibitor is a small molecule compound. The term "small molecule compound" as used herein refers to a small organic compound typically having a molecular weight of less than 2000 daltons, 1500 daltons, 1000 daltons, 800 daltons or 600 daltons.

In some embodiments, the c-P4H inhibitor inhibits the Prolyl Hydroxylase Domain (PHD) of c-P4H (PHD inhibitor).

In a particular embodiment, the PHD inhibitor specifically inhibits c-P4H. The term "specific c-P4H inhibitor" or "selective c-P4H inhibitor" refers to a compound or mixture of compounds that selectively inhibit c-P4H relative to other members of the 2-oxoglutarate (2-OG) dependent dioxygenase superfamily.

In a particular embodiment of the invention, the agent that inhibits c-P4H hydroxylase activity is a structural mimetic of 2-oxoglutarate. Such compounds competitively inhibit the target 2-oxoglutarate dioxygenase family member.

A general structure for HIF hydroxylase inhibitors for use in the invention is

Wherein:

r1 is selected from the group consisting of: hydroxy, alkoxy, substituted alkoxy, aryloxy, and substituted aryloxy;

r2 and R3 are independently selected from the group consisting of: hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heterocycloalkyl, substituted heterocycloalkyl, heteroaryl, and substituted heteroaryl; or R2 and R3 together with the carbon atom to which they are attached form cycloalkyl, substituted cycloalkyl, heterocycloalkyl, or substituted heterocycloalkyl;

r4 is selected from the group consisting of: hydrogen, alkyl and substituted alkyl;

r5 is selected from the group consisting of: hydroxy, alkoxy, and substituted alkoxy;

r6 is selected from the group consisting of: hydrogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, cyano, halogen, hydroxy, alkoxy, substituted alkoxy, amino, substituted amino, aryloxy (arylozy), substituted aryloxy (substituted arylozy), aminoacyl, substituted aminoacyl, cycloalkoxy, substituted cycloalkoxy, aryl, substituted aryl, aryloxy, substituted aryloxy, heterocycloalkyl, substituted heterocycloalkyl, heteroaryloxy, substituted heteroaryloxy, heteroaryl, and substituted heteroaryl; and is

R7, R8, R9 and R10 are independently selected from the group consisting of: hydrogen, halogen, alkyl, substituted alkyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, alkoxy, substituted alkoxy, aryloxy, and substituted aryloxy.

In some embodiments, R6 is alkyl. In another embodiment, the alkyl at R6 is methyl.

In some embodiments, R5 is hydroxy.

In some embodiments, R8 is aryloxy.

In some embodiments, wherein R6 is methyl and R5 is hydroxy.

As used herein, the term "alkyl" refers to a straight or branched chain saturated hydrocarbon group having from 1 to 10 carbon atoms, more specifically from 1 to 5 carbon atoms, and even more specifically from 1 to 3 carbon atoms. Representative alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, t-butyl, n-pentyl, and the like.

The term "substituted alkyl" refers to an alkyl group having 1 to 10 carbon atoms, more particularly 1 to 5 carbon atoms, and having 1 to 5 substituents, preferably 1 to 3 substituents, each independently selected from the group consisting of: alkoxy, substituted alkoxy, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, substituted aryl, aryloxy, substituted aryloxy, aryloxyaryl, substituted aryloxyaryl, cyano, halogen, hydroxy, nitro, oxo, thiono, carboxy, carboxyester, cycloalkyl, substituted cycloalkyl, thio, alkylthio, substituted alkylthio, arylthio, substituted arylthio, cycloalkylthio, substituted cycloalkylthio, heteroarylthio, substituted heteroarylthio, heterocyclylthio, substituted heterocyclylthio, sulfonyl, substituted sulfonyl, heteroaryl, substituted heteroaryl, heterocyclyl, substituted heterocyclyl, cycloalkoxy, substituted alkoxycarbonylamino, alkoxy, Heteroaryloxy, substituted heteroaryloxy, heterocyclyloxy, substituted heterocyclyloxy, oxycarbonylamino, oxythiocarbonylamino, -OS (O) 2-alkyl, -OS (O) 2-substituted alkyl, -OS (O) 2-aryl, -OS (O) 2-substituted aryl, -OS (O) 2-heteroaryl, -OS (O) 2-substituted heteroaryl, -OS (O) 2-heterocyclyl, -OS (O) 2-substituted heterocyclyl and-OSO 2-NR11R11, -NR11S (O)2-NR 11-alkyl, -NR11S (O)2-NR 11-substituted alkyl, -NR11S (O)2-NR 11-aryl, -NR11S (O)2-NR 11-substituted aryl, -NR11S (O)2-NR 11-heteroaryl, -NR11S (O)2-NR 11-substituted heteroaryl, -NR11S (O)2-NR 11-heterocyclyl, and-NR 11S (O) 2-R11-substituted heterocyclyl, wherein each R11 is independently selected from hydrogen or alkyl. Representative substituted alkyl groups include trifluoromethyl, benzyl, pyrazol-1-ylmethyl, and the like.

The term "alkoxy" refers to the group "alkyl-O-", which includes, for example, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, tert-butoxy, sec-butoxy, n-pentoxy, and the like.

The term "substituted alkoxy" refers to the group "substituted alkyl-O-".

The term "acyl" refers to the groups H-C (O) -, alkyl-C (O) -, substituted alkyl-C (O) -, alkenyl-C (O) -, substituted alkenyl-C (O) -, alkynyl-C (O) -, substituted alkynyl-C (O) -, cycloalkyl-C (O) -, substituted cycloalkyl-C (O) -, aryl-C (O) -, substituted aryl-C (O) -, heteroaryl-C (O) -, substituted heteroaryl-C (O) -, heterocyclyl-C (O) -, and substituted heterocyclyl-C (O) -, with the proviso that the nitrogen atom of the heterocyclyl or substituted heterocyclyl is not bound to the-C (O) -group, wherein alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl are as defined herein.

The term "aminoacyl" or "amide", or the prefix "carbamoyl", "carboxamide", "substituted carbamoyl" or "substituted carboxamide", refers to the group-c (o) NR12R12, wherein each R12 is independently selected from the group consisting of: hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, aryl, substituted aryl, cycloalkyl, substituted cycloalkyl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl; or wherein each R12 is joined together with the nitrogen atom to form a heterocyclic group or a substituted heterocyclic group, and wherein alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclic, and substituted heterocyclic are as defined herein.

The term "acyloxy" refers to the group alkyl-C (O) O-, substituted alkyl-C (O) O-, alkenyl-C (O) O-, substituted alkenyl-C (O) O-, alkynyl-C (O) O-, substituted alkynyl-C (O) O-, aryl-C (O) O-, substituted aryl-C (O) O-, cycloalkyl-C (O) O-, substituted cycloalkyl-C (O) O-, heteroaryl-C (O) O-, substituted heteroaryl-C (O), heterocyclyl-C (O) O-, and substituted heterocyclyl-C (O) O-, wherein alkyl, substituted alkyl, alkenyl, substituted heteroaryl-C (O), heterocyclyl-C (O), and substituted heterocyclyl-C (O) O-, and combinations thereof, Substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclic and substituted heterocyclic are as defined herein.

The term "alkenyl" refers to an ethylenically unsaturated monovalent hydrocarbon radical having from 2 to 6 carbon atoms, and preferably from 2 to 4 carbon atoms, and having at least 1, and preferably from 1 to 2 sites of ethylenic (> C ═ C <) unsaturation. Representative alkenyl groups include vinyl (ethen-1-yl), allyl, but-3-enyl, and the like.

The term "substituted alkenyl" refers to alkenyl having 1 to 3 substituents, and preferably 1 to 2 substituents, selected from the group consisting of: alkoxy, substituted alkoxy, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aryl, substituted aryl, aryloxy, substituted aryloxy, cyano, halogen, hydroxy, nitro, carboxy ester, cycloalkyl, substituted cycloalkyl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl. This term includes the E (trans) and Z (cis) isomers, where appropriate. It also includes a mixture of E component and Z component.

The term "alkynyl" refers to an acetylenically unsaturated monovalent hydrocarbon radical having from 2 to 6 carbon atoms, and preferably from 2 to 3 carbon atoms, and having at least 1, and preferably from 1 to 2 sites of acetylenic (-C ≡ C-) unsaturation. Representative alkynyl groups include ethynyl-1-yl, propyn-2-yl and the like.

The term "amino" refers to the group-NH 2.

The term "substituted amino" refers to the group-NR 13R13, wherein each R13 is independently selected from the group consisting of: hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclyl, substituted heterocyclyl, sulfonyl, and substituted sulfonyl, with the proviso that both R13 groups are not hydrogen; or the R13 group may be joined together with the nitrogen atom to form a heterocyclyl or substituted heterocyclyl ring. Representative substituted amino groups include phenylamino, methylphenylamino and the like. Representative substituted amino groups include (acetoxy-2-yl) amino and the like.

The term "acylamino" refers to the groups-NR 14C (O) alkyl, -NR14C (O) substituted alkyl, -NR14C (O) cycloalkyl, -NR14C (O) substituted cycloalkyl, -NR14C (O) alkenyl, -NR14C (O) substituted alkenyl, -NR14C (O) alkynyl, -NR14C (O) substituted alkynyl, -NR14C (O) aryl, -NR14C (O) substituted aryl, -NR14C (O) heteroaryl, -NR14C (O) substituted heteroaryl, -NR14C (O) heterocyclyl, and-NR 14C (O) substituted heterocyclyl, wherein R14 is hydrogen or alkyl, and wherein alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclyl and substituted heterocyclyl are as defined herein.

The term "oxycarbonylamino" refers to the groups-NR 15C (O) O-alkyl, -NR15C (O) O-substituted alkyl, -NR15C (O) O-alkenyl, -NR15C (O) O-substituted alkenyl, -NR15C (O) O-alkynyl, -NR15C (O) O-substituted alkynyl, -NR15C (O) O-cycloalkyl, -NR15C (O) O-substituted cycloalkyl, -NR15C (O) O-aryl, -NR15C (O) O-substituted aryl, -NR15C (O) O-heteroaryl, -NR15C (O) O-substituted heteroaryl, -NR15C (O) O-heterocyclyl and-NR 15C (O) O-substituted heterocyclyl, wherein R15 is hydrogen or alkyl, and wherein alkyl, aryl, heteroaryl, heterocyclyl, and heterocyclyl, Substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl are as defined herein.

The term "alkoxythiocarbonylamino" refers to the groups-NR 16C (S) O-alkyl, -NR16C (S) O-substituted alkyl, -NR16C (S) O-alkenyl, -NR16C (S) O-substituted alkenyl, -NR16C (S) O-alkynyl, -NR16C (S) O-substituted alkynyl, -NR16C (S) O-cycloalkyl, -NR16C (S) O-substituted cycloalkyl, -NR16C (S) O-aryl, -NR16C (S) O-substituted aryl, -NR16C (S) O-heteroaryl, -NR16C (S) O-substituted heteroaryl, -NR16C (S) O-heterocyclyl and-NR 16C (S) O-substituted heterocyclyl, wherein R16 is hydrogen or alkyl, and wherein alkyl, NR16 (S) O-substituted heterocyclyl, Substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl are as defined herein.

The term "aminocarbonyloxy" or the prefix "carbamoyloxy" or "substituted carbamoyloxy" refers to the group-oc (o) NR17R17 wherein each R17 is independently selected from the group consisting of: hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl; or wherein each R17 is joined together with the nitrogen atom to form a heterocyclic group or a substituted heterocyclic group, and wherein alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclic, and substituted heterocyclic are as defined herein.

The term "aminocarbonylamino" refers to the group-NR 18C (O) -NR18R18, wherein each R18 is independently selected from the group consisting of: hydrogen and alkyl.

The term "aminothiocarbonylamino" refers to the group-NR 19C (S) -NR19R19 wherein each R19 is independently selected from the group consisting of: hydrogen and alkyl.

The term "aryl" refers to a monovalent aromatic carbocyclic group of 6 to 14 carbon atoms having a single ring (e.g., phenyl) or multiple condensed rings (e.g., naphthyl or anthracenyl) which may or may not be aromatic (e.g., 2-benzoxazolinone, 2H-1, 4-benzoxazin-3 (4H) -one-7-yl, etc.), provided that the point of attachment is an aryl group. Preferred aryl groups include phenyl and naphthyl.

The term "substituted aryl" refers to an aryl group as defined herein substituted with 1 to 4, in particular 1 to 3 substituents selected from the group consisting of: hydroxyl, acyl, acylamino, acyloxy, alkyl, substituted alkyl, alkoxy, substituted alkoxy, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, carbamimidoyl (-C (═ NH) -amino or substituted amino), amino, substituted amino, aminoacyl, aminocarbonyloxy, aminocarbonylamino, aminothiocarbonylamino, aryl, substituted aryl, aryloxy, substituted aryloxy, cycloalkoxy, substituted cycloalkoxy, heteroaryloxy, substituted heteroaryloxy, heterocyclyloxy, substituted heterocyclyloxy, carboxyl ester, cyano, thio, alkylthio, substituted alkylthio, arylthio, substituted arylthio, heteroarylthio, substituted heteroarylthio, cycloalkylthio, substituted cycloalkylthio, heterocyclylthio, heterocyclylthiothio, substituted alkyl, substituted cycloalkyl, heterocyclylthio, substituted alkyl, alkoxy, substituted alkenyl, alkynyl, substituted alkynyl, carbamimidoyl (-O), amino (-COO), amino (-, Substituted heterocyclylthio, cycloalkyl, substituted cycloalkyl, guanidino (-NH-C (═ NH) -amino or substituted amino), halogen, nitro, heteroaryl, substituted heteroaryl, heterocyclyl, substituted heterocyclyl, oxycarbonylamino, oxythiocarbonylamino, sulfonyl, substituted sulfonyl, -OS (O) 2-alkyl, -OS (O) 2-substituted alkyl, -OS (O) 2-aryl, -OS (O) 2-substituted aryl, -OS (O) 2-heteroaryl, -OS (O) 2-substituted heteroaryl, -OS (O) 2-heterocyclyl, -OS (O) 2-substituted heterocyclyl and-OSO 2-NR20R20, -NR20S (O)2-NR 20-alkyl, substituted amino, halogen, nitro, heteroaryl, substituted heteroaryl, heterocyclyl, substituted heterocyclyl, O (O) 2-aryl, O2-substituted heteroaryl, O (O)2, -NR20S (O)2-NR 20-substituted alkyl, -NR20S (O)2-NR 20-aryl, -NR20S (O)2-NR 20-substituted aryl, -NR20S (O)2-NR 20-heteroaryl, -NR20S (O)2-NR 20-substituted heteroaryl, -NR20S (O)2-NR 20-heterocyclyl, -NR20S (O)2-NR 20-substituted heterocyclyl, wherein each R20 is independently selected from hydrogen or alkyl, and wherein the terms are each as defined herein. Representative substituted aryl groups include 4-fluorophenyl, 3-methoxyphenyl, 4-tert-butylphenyl, 4-trifluoromethylphenyl, 2-trifluoromethoxyphenyl, 3-trifluoromethoxyphenyl, 4-trifluoromethoxyphenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2-chloro-6-fluorophenyl, 2, 4-dichlorophenyl, 4-methoxyphenyl, 3-cyanophenyl, 4-phenoxyphenyl, 4-methanesulfonylphenyl, biphenyl-4-yl and the like.

The term "aryloxy" refers to the group aryl-O-, which includes, for example, phenoxy, naphthoxy, and the like.

The term "substituted aryloxy" refers to a substituted aryl-O-group.

The term "aryloxyaryl" refers to the group-aryl-O-aryl.

The term "substituted aryloxyaryl" refers to aryloxyaryl substituted on one or both aromatic rings with 1 to 3 substituents as defined above for substituted aryl.

The term "carboxyl" refers to-COOH or a salt thereof.

The term "carboxy ester" refers to the groups-C (O) O-alkyl, -C (O) O-substituted alkyl, -C (O) O-alkenyl, -C (O) O-substituted alkenyl, -C (O) O-alkynyl, -C (O) O-substituted alkynyl, -C (O) β -cycloalkyl, -C (O) O-substituted cycloalkyl, -C (O) O-aryl, -C (O) O-substituted aryl, -C (O) O-heteroaryl, -C (O) O-substituted heteroaryl, -C (O) O-heterocyclyl, and-C (O) O-substituted heterocyclyl.

The term "cyano" refers to the group-CN.

The term "cycloalkyl" refers to a saturated or unsaturated, but non-aromatic, cycloalkyl group of 3 to 10, 3 to 8, or 3 to 6 carbon atoms having a single ring or multiple rings, including, for example, adamantyl, cyclopropyl, cyclobutyl, cyclopentyl, cyclooctyl, cyclohexenyl, and the like.

The term "substituted cycloalkyl" refers to a cycloalkyl group having 1 to 5 substituents selected from the group consisting of: oxo (═ O), thioketo (═ S), alkyl, substituted alkyl, alkoxy, substituted alkoxy, acyl, acylamino, acyloxy, amino, substituted amino, aminoacyl, aryl, substituted aryl, aryloxy, substituted aryloxy, cyano, halogen, hydroxy, nitro, carboxyl ester, cycloalkyl, substituted cycloalkyl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl.

The terms "cycloalkylene" and "substituted cycloalkylene" refer to a divalent cycloalkyl and substituted cycloalkyl group as defined above.

The term "cycloalkoxy" refers to-O-cycloalkyl.

The term "substituted cycloalkoxy" refers to an-O-substituted cycloalkyl group.

The term "halo" or "halogen" refers to fluorine, chlorine, bromine and iodine.

The term "hydroxy/hydroxyl" refers to the group-OH.

The term "heteroaryl" refers to an aromatic ring having 1 to 15 carbon atoms, preferably 1 to 10 carbon atoms, and 1 to 4 heteroatoms in the ring, selected from the group consisting of: oxygen, nitrogen and sulfur. Such heteroaryl groups can have a single ring (e.g., pyridyl, furyl, or thienyl) or multiple fused rings (e.g., indolizinyl or benzothienyl), provided that the point of attachment is through a ring containing a heteroatom and the ring is aromatic. The nitrogen and/or sulfur ring atoms may optionally be oxidized to provide N-oxides or sulfoxides, and sulfone derivatives. Representative heteroaryl groups include pyridyl, pyrimidinyl, pyrrolyl, pyrazolyl, indolyl, thiophenyl, thienyl, furanyl, and the like.

The term "substituted heteroaryl" refers to heteroaryl substituted with 1 to 3 substituents selected from the same group of substituents as defined for substituted aryl. Representative substituted heteroaryl groups include 5-fluoro-pyridin-3-yl, 1-benzyl-1H- [1,2,3] triazol-4-yl, 5-bromo-furan-2-yl, trifluoromethyl-2H-pyrazol-3-yl, and the like.

The term "heteroaryloxy" refers to the group-O-heteroaryl, and "substituted heteroaryloxy" refers to the group-O-substituted heteroaryl.

The term "heterocyclyl" or "heterocycle" refers to a saturated or unsaturated (but not aromatic) group having 1 to 10 carbon atoms with 1 to 4 heteroatoms selected from nitrogen, sulfur or oxygen within the ring, with a single ring or multiple fused rings, wherein in the fused ring system one or more of the rings can be aryl or heteroaryl, provided that the point of attachment is at the heterocycle. The nitrogen and/or sulfur ring atoms may optionally be oxidized to provide N-oxides or sulfoxides, and sulfone derivatives.

The term "substituted heterocyclyl" or "substituted heterocycle" refers to a heterocyclic group that is substituted with 1 to 3 of the same substituents as defined for substituted cycloalkyl.

Examples of heterocycles and heteroaryls include, but are not limited to: azetidine, pyrrole, imidazole, pyrazole, pyridine, pyrazine, pyrimidine, pyridazine, indolizine, isoindole, indole, indoline, indazole, purine, quinolizine, isoquinoline, quinoline, phthalazine, naphthylpyridine, quinoxaline, quinazoline, cinnoline, pteridine, carbazole, carboline, phenanthridine, acridine, phenanthroline, isothiazole, phenazine, isoxazole, phenoxazine, phenothiazine, imidazolidine, imidazoline, piperidine, piperazine, indoline, phthalimide, 1,2,3, 4-tetrahydroisoquinoline, 4,5,6, 7-tetrahydrobenzo [ b ] thiophene, thiazole, thiazolidine, thiophene, benzo [ b ] thiophene, morpholinyl, thiomorpholinyl (also known as thiomorpholinyl), piperidinyl, pyrrolidine, tetrahydrofuranyl and the like.

The term "nitro" refers to the group-NO 2.

The term "oxo" refers to an atom (═ O) or an atom (-O-).

The term "sulfonyl" refers to the group-S (O) 2H.

The term "substituted sulfonyl" refers to the group-SO 2-alkyl, -SO 2-substituted alkyl, -SO 2-alkenyl, -SO 2-substituted alkenyl, -SO 2-alkynyl, -SO 2-substituted alkynyl, -SO 2-cycloalkyl, -SO 2-substituted cycloalkyl, -SO 2-cycloalkenyl, -SO 2-substituted cycloalkenyl, -SO 2-aryl, -SO 2-substituted aryl, -SO 2-heteroaryl, -SO 2-substituted heteroaryl, -SO 2-heterocyclyl, -SO 2-substituted heterocyclyl, where alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, cycloalkyl, substituted cycloalkyl, Cycloalkenyl, substituted cycloalkenyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclyl, and substituted heterocyclyl are as defined herein. Representative sulfonyl groups include methyl-SO 2-, phenyl-SO 2-, 4-methylphenyl-SO 2-, and the like.

The term "heterocyclyloxy" refers to the group-O-heterocyclyl, and "substituted heterocyclyloxy" refers to the group-O-substituted heterocyclyl.

The term "thio" refers to the group-SH.

The term "alkylsulfanyl", "alkylthio" or "thioether" refers to the group-S-alkyl, wherein alkyl is as defined above.

The term "substituted alkylthio", "substituted alkylsulfanyl" or "substituted alkylthio" refers to a group-S-substituted alkyl, wherein substituted alkyl is as defined above.

The term "cycloalkylthio" or "cycloalkylsulfanyl" refers to the group-S-cycloalkyl, where cycloalkyl is as defined above.

The term "substituted cycloalkylthio" refers to a cycloalkyl group substituted with the group-S-, wherein the substituted cycloalkyl group is as defined above.

The term "arylthio" or "arylthioalkyl" refers to the group-S-aryl, and "substituted arylthio" refers to the group-S-substituted aryl, wherein aryl and substituted aryl are as defined above.

The term "heteroarylthio" or "heteroarylsulfanyl" refers to the group-S-heteroaryl, and "substituted heteroarylthio" refers to the group-S-substituted heteroaryl, where heteroaryl and substituted heteroaryl are as defined above.

The term "heterocyclylthio" or "heterocyclylthioalkyl" refers to the group-S-heterocyclyl, and "substituted heterocyclylthio" refers to the group-S-substituted heterocyclyl, wherein heterocyclyl and substituted heterocyclyl are as defined above.

The term "ester" refers to the group-C (O) OR21, where R21 is alkyl, substituted alkyl, aryl, OR substituted aryl.

In one embodiment, in formula (I), R1 and R5 are hydroxy; r2, R3, R4, R7, R9 and R10 are hydrogen; r6 is methyl; and R8 is phenoxy, and the compound has a structure shown in the following formula (II). This molecule is also known as FG-4592 (also known as rasagiline), which is an isoquinolinone with the chemical name N- [ (4-hydroxy-1-methyl-7-phenoxyisoquinolin-3-yl) carbonyl ] glycine ].

FG-4592 (roxasistat) is in phase 3 clinical trial and is used for treating anemia in chronic kidney disease, and no adverse reaction is reported.

In a particular embodiment, FG-4592 (roxasistat) is administered in an amount between 0.2mg/kg and 20 mg/kg. In another embodiment, the dose of FG-4592 (roxasistat) is 0.2mg/kg, 0.5mg/kg, 1mg/kg, 2mg/kg, 3mg/kg, 4mg/kg, 5mg/kg, 6mg/kg, 7mg/kg, 8mg/kg, 9mg/kg, 10mg/kg, 15mg/kg, 18mg/kg or 20 mg/kg.

In some embodiments, FG-4592 (roxasistat) analogs are used. FG-4592 analogs are described in U.S. patent nos. 9,701,647, 9,439,888, 7,863,292; and U.S. patent application nos. 13/186351 and 11/549571, which are all incorporated by reference in their entirety.

In another particular embodiment, the C-P4H inhibitor is dimethyloxalylglycine (DMOG, an aminodicarboxylic acid flanked by methyl groups; chemical name N- (2-methoxy-2-oxoacetyl) glycine methyl ester). DMOG has the following chemical structure:

in a particular embodiment, the DMOG is administered in an amount between 50mg/kg and 200 mg/kg. In another embodiment, the dose of DMOG is 50mg/kg, 55mg/kg, 60mg/kg, 65mg/kg, 70mg/kg, 75mg/kg, 80mg/kg, 85mg/kg, 90mg/kg, 95mg/kg, 100mg/kg, 105mg/kg, 110mg/kg, 115mg/kg, 120mg/kg, 125mg/kg, 130mg/kg, 135mg/kg, 140mg/kg, 145mg/kg, 150mg/kg, 155mg/kg, 160mg/kg, 165mg/kg, 170mg/kg, 175mg/kg, 180mg/kg, 185mg/kg, 190mg/kg, 195mg/kg or 200 mg/kg.

In one embodiment, the C-P4H inhibitor may be combined with a pharmaceutically acceptable carrier prior to administration. For the purposes of this disclosure, "pharmaceutically acceptable carrier" means any standard pharmaceutical carrier. Examples of suitable carriers are well known in the art and may include, but are not limited to, any standard pharmaceutical carrier, such as phosphate buffered saline solution and various wetting agents. Other carriers may include additives used in tablets, granules, capsules and the like. Typically, such vehicles contain excipients such as starch, milk, sugar, certain types of clays, gelatin, stearic acid or salts thereof, magnesium or calcium stearate, talc, vegetable fats or oils, gums, glycols, or other known excipients. Such carriers may also include flavoring and coloring additives or other ingredients. Compositions comprising such carriers may be formulated by well-known conventional methods.

The C-P4H inhibitor may be admixed with a pharmaceutically acceptable carrier to prepare a pharmaceutical formulation in any conventional form, including, inter alia, solid forms such as tablets, capsules (e.g., hard or soft gelatin capsules), pills, cachets, powders, granules, and the like; liquid forms, such as solutions, suspensions; or in the form of micronized powder, spray, aerosol, etc.

In some embodiments, the compositions of the present disclosure may be administered by different routes of administration, such as by oral, oronasal, or parenteral routes.

"oral" or "peroral" administration refers to the introduction of a substance into the body of a subject by or via the oral cavity and involves swallowing or delivery through the oral mucosa (e.g., sublingual or buccal absorption) or both.

By "oronasal" administration is meant the introduction of a substance into the body of a subject through or via the nose and mouth, for example by placing one or more droplets into the nose. Oronasal administration refers to delivery processes associated with oral and intranasal administration.

By "parenteral administration" is meant the introduction of a substance into the body of a subject by or by a route that does not include the digestive tract. Parenteral administration includes subcutaneous administration, intramuscular administration, transdermal administration, intradermal administration, intraperitoneal administration, intraocular administration, and intravenous administration.

In some embodiments, the composition comprising the C-P4H inhibitor may be administered by aerosol. This can be accomplished, for example, by preparing an aqueous aerosol, liposome formulation, or solid particle containing a composition comprising a formulation of C-P4H inhibitor. Non-aqueous (e.g., fluorocarbon propellant) suspensions may be used. Ultrasonic atomizers may also be used. Aqueous aerosols are prepared by formulating an aqueous solution or suspension of the agent with conventional pharmaceutically acceptable carriers and stabilizers. The carrier and stabilizer will vary with the requirements of the particular compound.

In another aspect of the disclosure, C-P4H inhibitors are used in a method of preventing CLD in preterm newborns. In a particular embodiment, the dose of C-P4H inhibitor administered to the preterm infant is between 0.2mg/kg and 200mg/kg, depending on the C-P4H inhibitor used and the route of administration chosen. In other embodiments, the C-P4H inhibitor is administered at a dose of about 0.2mg/kg, 0.5mg/kg, 1mg/kg, 2mg/kg, 3mg/kg, 5mg/kg, 8mg/kg, 10mg/kg, 15mg/kg, 20mg/kg, 25mg/kg, 30mg/kg, 35mg/kg, 40mg/kg, 45mg/kg, 50mg/kg, 55mg/kg, 60mg/kg, 65mg/kg, 70mg/kg, 75mg/kg, 80mg/kg, 85mg/kg, 90mg/kg, 95mg/kg, 100mg/kg, 105mg/kg, 110mg/kg, 115mg/kg, 120mg/kg, 125mg/kg, 130mg/kg, 135mg/kg, 140mg/kg, 145mg/kg, 150mg/kg, 155mg/kg, 160mg/kg, 165mg/kg, 170mg/kg, 175mg/kg, 180mg/kg, 185mg/kg, 190mg/kg, 195mg/kg or 200mg/kg of a C-P4H inhibitor.

In yet another embodiment, the C-P4H inhibitor is administered daily to a patient in need thereof. In another embodiment, the C-P4H inhibitor is administered intermittently every two or three days. In yet another embodiment, the C-P4H inhibitor is administered during an oxygen supplementation session, and administration of the C-P4H inhibitor is stopped immediately after the neonate is no longer supplemented with oxygen. In a particular embodiment, the C-P4H inhibitor is administered once a week. Administration of the C-P4H inhibitor may continue until the neonate can spontaneously breathe room air.

In some embodiments, the PHD inhibitor is selected from the group consisting of: rosemastat (RXD) (FG-4592), Kodosetat (AKB-6548), dapoxetol (GSK-1278863), and Molipstat (BAY 85-3934).

In some embodiments, the c-P4H inhibitor is an inhibitor selected from the group consisting of: introduction of nucleic acid inhibitors, CRISPR/Cas systems, Cre/Lox systems, TALEN systems, and homologous recombination.

In some embodiments, the nucleic acid inhibitor of c-P4H inhibits the expression of the c0P4H gene. In a particular embodiment, the nucleic acid inhibitor of c-P4H is selected from the group consisting of: antisense RNA, small interfering RNA, RNAi micro RNA, artificial micro RNA and ribonuclease.

Another aspect of the present disclosure is directed to an expression vector comprising a nucleotide sequence operably linked to a regulatory region functional in a cell, said nucleotide sequence being transcribed into a nucleic acid inhibitor of c-P4H gene expression, wherein said nucleic acid is selected from the group consisting of: antisense RNA, small interfering RNA, RNAi micro RNA, artificial micro RNA and ribonuclease.

In some embodiments, the regulatory region comprises an inducible promoter, a tissue-specific promoter, or an organ-specific promoter. In a particular embodiment, the organ-specific promoter is selected from the group consisting of: lung-specific promoters, kidney-specific promoters and liver-specific promoters.

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 invention belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, the preferred methods and materials are now described. All publications mentioned herein are incorporated herein by reference to disclose and describe the methods and/or materials in connection with which the publications are cited.

The specific embodiments set forth below are exemplary only, and are not intended to be limiting.

Examples