阅读说明：本技术 一种和厚朴酚衍生物在制备预防和/或治疗牛乳房炎的药物中的用途 (Application of honokiol derivative in preparation of medicine for preventing and/or treating bovine mastitis ) 是由 阳泰 广兵 董韧涵 刘进 谢建 覃传军 黄胜 占伟 彭向阳 赖永新 许庆 彭坚 于 2020-09-16 设计创作，主要内容包括：本发明提供了一种和厚朴酚衍生物在制备预防和/或治疗牛乳房炎的药物中的用途,属于医药技术领域。具体的,本发明提供了式(I)所示的化合物、或其盐在制备预防和/或治疗牛乳房炎的药物中的用途；其中,R-1、R-2独立选自H、硫酸酯或其药学上可以接受盐、磷酸酯或其药学上可以接受盐,且R-1、R-2不同时为H。本发明和厚朴酚衍生物对于治疗乳腺炎确实有良好的效果。可以用于制备预防和/或治疗牛乳房炎的药物。(The invention provides an application of honokiol derivatives in preparing a medicine for preventing and/or treating bovine mastitis, and belongs to the technical field of medicines. Specifically, the invention provides an application of a compound shown as a formula (I) or a salt thereof in preparing a medicament for preventing and/or treating bovine mastitis; wherein R is 1 、R 2 Independently selected from H, sulphate or a pharmaceutically acceptable salt thereof, phosphate or a pharmaceutically acceptable salt thereof, and R 1 、R 2 Not H at the same time. The honokiol derivative has good effect on treating mastitis. Can be used for preparing medicine for preventing and/or treating bovine mastitis.)

1. The application of the compound shown in the formula (I) or the salt thereof in preparing the medicine for preventing and/or treating bovine mastitis:

wherein R is₁、R₂Independently selected from H, sulphate or a pharmaceutically acceptable salt thereof, phosphate or a pharmaceutically acceptable salt thereof, and R₁、R₂Not H at the same time.

2. Use according to claim 1, characterized in that: the sulfate ester or a pharmaceutically acceptable salt thereof is as follows:

wherein R is₃Selected from H, alkali metals or organic amines;

and/or, the phosphate ester or pharmaceutically acceptable salt thereof is as follows:

wherein R is₃、R₄Selected from H, alkali metal or organic amine.

3. Use according to claim 2, characterized in that: the compound, or a salt thereof, is represented by formula (Ia):

wherein R is_1a、R_2a、R_3a、R_4aIndependently or simultaneously selected from alkali metals or organic amines;

and/or the compound, or a salt thereof, is represented by formula (Ib):

wherein R is_1b、R_2bEither individually or both, selected from alkali metals or organic amines.

4. Use according to claim 3, characterized in that: the alkali metal is lithium, sodium, potassium, calcium and magnesium; and/or the organic amine is ammonia, lysine and glucosamine.

5. Use according to claim 1, characterized in that: the compound, or salt thereof, is one of the following structures:

6. use according to claims 1 to 5, characterized in that: the medicine is a preparation prepared by taking the compound or the salt thereof as an active ingredient and adding pharmaceutically acceptable auxiliary materials.

7. Use according to claim 6, characterized in that: the preparation is an external preparation, an injection preparation or an oral preparation.

8. Use according to claim 7, characterized in that: the external preparation is a nipple infusion.

9. Use according to claim 1, characterized in that: when the medicine is used for treating bovine mastitis, the administration amount of the compound or the salt thereof is 0.3 mu g/kg to 200 mg/kg.

Technical Field

The invention belongs to the technical field of medicines, and particularly relates to an application of a honokiol derivative in preparation of a medicine for preventing and/or treating bovine mastitis.

Background

Cow mastitis is the most common disease affecting the dairy farming industry. Although national government agencies, veterinary clinicians and researchers are investing large amounts of labor, materials and resources to prevent and control the disease, no effective vaccine or drug has been developed to date. Bacterial drug resistance and antibiotic residues caused by long-term use of antibiotics pose great threats to national social public health safety and human health.

Honokiol is an active ingredient contained in Magnoliaceae plants or traditional Chinese medicine Magnolia officinalis, has long history of use in traditional medicine, is pungent in taste and warm in nature, and has effects of activating qi-flowing, eliminating dampness, warming middle warmer, relieving pain, lowering adverse qi, and relieving asthma. The honokiol is an excellent natural bacteriostatic agent, and has obvious killing effect on common bacterial strains causing the mastitis of the dairy cows. However, honokiol is difficult to be absorbed and utilized by organisms and seriously influences the drug effect; and the administration mode of the treatment aiming at the cow mastitis is local injection and perfusion. Therefore, despite the excellent bacteriostatic activity of honokiol, there is a bottleneck in its development into an anti-bovine mastitis drug.

Disclosure of Invention

In order to solve the problems, the invention provides an application of a honokiol derivative in preparing a medicament for preventing and/or treating bovine mastitis.

The invention provides an application of a compound shown as a formula (I) or a salt thereof in preparing a medicament for preventing and/or treating bovine mastitis:

wherein R is₁、R₂Independently selected from H, sulphate or a pharmaceutically acceptable salt thereof, phosphate or a pharmaceutically acceptable salt thereof, and R₁、R₂Not H at the same time.

Further, the sulfate ester or a pharmaceutically acceptable salt thereof is as follows:

wherein R is₃Selected from H, alkaliA metal or organic amine;

and/or, the phosphate ester or pharmaceutically acceptable salt thereof is as follows:

wherein R is₃、R₄Selected from H, alkali metal or organic amine.

Further, the compound, or a salt thereof, is represented by formula (Ia):

wherein R is_1a、R_2a、R_3a、R_4aIndependently or simultaneously selected from alkali metals or organic amines;

and/or the compound, or a salt thereof, is represented by formula (Ib):

wherein R is_1b、R_2bEither individually or both, selected from alkali metals or organic amines.

Further, the alkali metal is lithium, sodium, potassium, calcium, magnesium; and/or the organic amine is ammonia, lysine and glucosamine.

Further, the compound, or salt thereof, is one of the following structures:

furthermore, the medicine is a preparation prepared by taking the compound or the salt thereof as an active ingredient and adding pharmaceutically acceptable auxiliary materials.

Further, the preparation is an external preparation, an injection preparation or an oral preparation.

Further, the external preparation is a teat dip.

Further, the compound, or a salt thereof, is administered in an amount of 0.3 μ g/kg to 200mg/kg when the drug is used for treating bovine mastitis.

Definitions of terms used in connection with the present invention: the initial definitions provided herein for a group or term apply to that group or term throughout the specification unless otherwise indicated; for terms not specifically defined herein, the meanings that would be given to them by a person skilled in the art are to be given in light of the disclosure and the context.

By "patient" is meant an animal, preferably a mammal, and more preferably a dairy cow.

The honokiol derivative has good effect on treating mastitis. Can be used for preparing medicine for preventing and/or treating bovine mastitis.

Obviously, many modifications, substitutions, and variations are possible in light of the above teachings of the invention, without departing from the basic technical spirit of the invention, as defined by the following claims.

The present invention will be described in further detail with reference to the following examples. This should not be understood as limiting the scope of the above-described subject matter of the present invention to the following examples. All the technologies realized based on the above contents of the present invention belong to the scope of the present invention.

Detailed Description

The raw materials and equipment used in the embodiment of the present invention are known products and obtained by purchasing commercially available products. Wherein honokiol is purchased from Guangzhou Crystal Biotechnology, Inc.; phosphorus oxychloride, sodium methoxide and other chemical reagents are purchased from chemical reagent factories of Synechol City.

Example 1 preparation of honokiol derivatives

Refer to the preparation method disclosed in CN201710100322.7 and make a little optimization. The specific operation is as follows:

preparation of honokiol diphosphate tetraammonium salt: stirring and dissolving 10 g of honokiol and 100 ml of dichloromethane, adding 15 g of pyridine, cooling to-5 ℃ in an ice salt bath, adding 23 g of phosphorus oxychloride dichloromethane diluted solution, and keeping the temperature at-5 ℃ until the raw materials are completely reacted by TLC detection. After quenching with 250 ml of ice water, slowly returning to room temperature and stirring overnight, pouring out the upper liquid, washing the residue with water, dissolving with 50ml of ethanol, cooling to 0 ℃ in an ice salt bath, dropping in concentrated ammonia water until the pH value is 8, separating out a white solid, filtering and pulping, and drying the solid in vacuum to obtain 14.1 g of honokiol diphosphate tetraammonium salt, wherein the structure is as follows:

the 400MHz nuclear magnetic hydrogen spectrum data are as follows:¹HNMR(400MHz,D2O):δ(ppm)7.10-7.11(m,2H),7.13-7.29(m,4H)，5.96-6.05(m,2H),4.99-5.09(m,4H),3.29(d,2H),3.42(d,2H)；ESI-MS m/z:495[M+H]⁺。

preparation of honokiol diphosphate tetrasodium salt: the preparation method of the analogous honokiol diphosphate tetraammonium salt uses sodium hydroxide solution to replace strong ammonia water to prepare tetrasodium salt, and the structure is as follows:

ESI-MS m/z:515[M+H]⁺。

preparation of honokiol diphosphate tetrapotassium salt: the preparation method of the analogous honokiol diphosphate tetraammonium salt uses potassium hydroxide solution to replace strong ammonia water to prepare the tetrapotassium salt, and the structure is as follows:

ESI-MS m/z:579[M+H]+。

preparation of honokiol disulfate disodium salt: adding 10 g of honokiol and 17 g (3 equivalents) of pyridine sulfur trioxide complex into 50ml of pyridine, stirring overnight at room temperature, concentrating under reduced pressure, adding 50ml of dilute acid water, extracting with 100 ml of ethyl acetate for three times, drying an ethyl acetate layer, concentrating to dryness to obtain a white solid, dispersing the solid in acetone, adding sodium methoxide, and filtering to obtain a solid, namely the honokiol disulfate disodium salt with the structure shown in the specification

Honokiol disulfate disodium salt:¹HNMR(400MHz,D2O):δ(ppm)7.36-7.39(m,4H),7.21(brs,2H),5.97(brs,2H),5.00-5.06(m,4H),3.33-3.43(m,4H)；ESI-MS m/z:471[M+H]⁺；

in a similar manner to the above, lithium salts, calcium salts, magnesium salts, organic ammonium salts and the like can also be obtained.

Example 2 protective Effect of honokiol derivatives on mouse mastitis model

A mouse mastitis model is established according to a method disclosed and reported in CN 105726631. Selecting 7 days after delivery of lactating mother mice, injecting urethane for anesthesia in abdominal cavity, fixing in supine position, fully exposing nipple, and shearing off the tip of nipple tip by about 1mm with aseptic ophthalmology scissors to expose breast duct. Staphylococcus aureus bacteria liquid through 50ml culture medium heavy suspension, PBS washing and heavy suspension in 1000 u l PBS, the concentration reaches 2x10⁸CFU/. mu.l, 100. mu.l per mammary gland was injected with Staphylococcus aureus using a microinjector. The experiment is divided into 4 groups, and the blank group of mice are not treated with drugs after infection treatment; the honokiol derivative (honokiol diphosphate tetrasodium salt) treatment group is injected with 10mg/kg of honokiol diphosphate tetrasodium salt physiological saline solution in the tail vein at 6 th, 12 th, 18 th and 24 th hours after the mammary gland infection is carried out for 24 hours; a positive control group, which is injected with 10mg/kg honokiol propylene glycol solution in the abdominal cavity after the mammary gland is infected for 24 hours at 6 hours, 12 hours, 18 hours and 24 hours respectively; in the sham group, mice were not treated for surgery and infection. After treatment, the change of the tested breast area of each group of female mice is observed by naked eyes, and the cell factors in the mammary tissue are measured, and the experimental results are recorded as the following table 1:

TABLE 1 protective Effect of Honokiol derivatives on mouse mastitis models

Grouping	Red swelling and pain	Congestion of blood	TNF-α(ng/g)	IL-1β(ng/g)	IL-6(ng/g)
						Blank group	Severe severity of disease	Severe severity of disease	16.48±0.36	18.01±0.15	4.84±0.23
Treatment group	Light and slight	Light and slight	4.69±0.09	6.14±0.11	2.37±0.10
						Positive group	Light and slight	Light and slight	8.70±0.13	9.09±0.14	4.17±0.11
Artificial operation group	Is free of	Is free of	2.23±0.11	3.57±0.07	1.61±0.06

The results show that after the staphylococcus aureus liquid is injected, the mammary tissue is obviously inflamed and hyperemic, the blank group is obviously changed compared with the sham operation group, and the honokiol derivative group and the positive group relieve the symptoms of the inflamed and hyperemic. After staphylococcus aureus liquid is injected, three cytokines are obviously increased in a blank group compared with a sham operation group; the positive group has three cytokines which are reduced compared with the blank group; in the honokiol derivative group, the reduction degree of the three cytokines is more obvious, and the treatment effect is more prominent than that of the positive group.

Example 3 protective Effect of Honokiol derivatives on bovine mastitis

According to the evaluation method disclosed in CN 105726631. 27 cows (with the weight of about 600 kg) with similar body conditions and mastitis are selected in a cow farm and randomly divided into a blank group, a treatment group and a positive group, wherein 9 cows are selected in each group. Blank groups are not processed; the treatment group locally injects honokiol diphosphate tetrasodium salt normal saline solution at the cow breast twice a day, and the injection dosage is 0.33 mg/kg; the positive group locally injects ciprofloxacin lactate solution at the cow udder twice a day, and the injection dosage is 0.33 mg/kg; the observation and evaluation were carried out after 5 consecutive days, and the evaluation criteria were as follows:

and (3) curing: the appetite of the dairy cows is recovered to be normal, and the symptoms of red, swollen, hot, painful and the like of the breast area disappear; the lactation yield and the milk color are recovered to be normal. The relapse phenomenon does not occur after the medicine is stopped and observed for more than 7 days, and the bacterial detection is negative.

The method has the following advantages: the appetite of the dairy cows is recovered to be normal, and the symptoms of red, swollen, hot, painful and the like in the breast area are obviously improved; the milk yield and the milk color are normal. The bacteria test positive.

And (4) invalidation: the appetite of the dairy cows is not recovered, and the symptoms of red, swollen, hot, painful and the like of the breast area are not converted or even worsened; the milk yield is reduced, even the milk is stopped, and the milk character is obviously abnormal. The bacteria test positive.

Effective rate (number of cure cases + number of effective cases)/total number of cases;

the cure rate is (number of cure cases)/total number of cases.

The results of the experiment are reported in table 2 below:

TABLE 2 protective Effect of Honokiol derivatives on mastitis in cows

Grouping	Inefficiency of	High efficiency	Cure rate
				Blank group	100％(9/9)	0％(0/9)	0％(0/9)
Treatment group	0％(0/9)	100％(9/9)	77.78％(7/9)
				Positive group	22.22％(2/9)	77.78％(7/9)	55.56％(5/9)

The result shows that the honokiol derivative can effectively treat the mastitis of the dairy cattle, the cure rate is 77.78%, the effective rate can reach 100%, and the treatment effect is more prominent than that of a positive control.

In conclusion, the honokiol derivative of the invention has good effect on treating mastitis. Can be used for preparing medicine for preventing and/or treating bovine mastitis.