CN111544599B

CN111544599B - Compound for treating acne and application of compound for preparing medicines or cosmetics

Info

Publication number: CN111544599B
Application number: CN202010660094.0A
Authority: CN
Inventors: 范绍旺; 杨洋
Original assignee: Youshu Skin Management Shenzhen Co Ltd
Current assignee: Youshu skin management (Shenzhen) Co.,Ltd.
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2020-12-01
Anticipated expiration: 2040-07-10
Also published as: CN111544599A

Abstract

The invention relates to a compound for treating acne and application thereof in preparing medicines or cosmetics, wherein the compound can be effectively used for treating acne, has no toxic or side effect, and has a better application prospect.

Description

Compound for treating acne and application of compound for preparing medicines or cosmetics

Technical Field

The invention relates to the field of medicines, in particular to a compound for treating acne and application thereof in preparing medicines or cosmetics.

Background

Acne is commonly known as "whelk", is mostly seen in young men and women, is a chronic inflammatory dermatosis which involves hair follicle sebaceous glands, is easily caused at seborrhea parts, and is clinically manifested by skin lesions such as acne, pimple, pustule, nodule, cyst, scar and the like. The causes of acne are complex, mainly related to androgen, sebum secretion increase, follicular sebaceous gland duct keratosis, propionibacterium acnes infection and secondary inflammation, and the occurrence of part of patients is also related to genetic factors, immunity, endocrine disturbance, emotion, diet and other factors. Traditional treatment methods achieve the goals of reducing p.acnes and inhibiting sebum secretion, mainly by oral or topical administration of drugs. Also commonly used physical treatments are mainly red and blue light therapy, intense pulse light, laser, photodynamic therapy, radiofrequency technology, and the like.

P.acnes can synthesize and store a large amount of porphyrins, which can selectively absorb blue light with the wavelength peak of 415nm to be activated to become high-energy unstable porphyrins, which generate singlet oxygen to damage cell membranes of bacteria, and a large amount of singlet oxygen acts on p.acnes to destroy and clear the p.acnes, thereby playing a role in relieving or eliminating acne inflammation skin lesions. Because of the low blue light penetrating capacity, the traditional Chinese medicine composition is mainly used for treating mild and moderate acne patients with inflammatory skin lesions. Currently, blue light is generally treated 2 times per week, 8 times of continuous treatment is a treatment course, and if the continuous treatment is not adhered to, the recurrence rate is high. The treatment of high-energy narrow-spectrum blue light in light to moderate acne patients has also attracted attention in recent years.

The anti-inflammatory effect of the red light and the antibacterial effect of the blue light are combined to achieve better curative effect on treating the acne. Research has been conducted on treating 24 cases of light to severe symmetric facial acne patients alternately with 415nm blue light and 633nm red light using an LED light source. Treatments were performed 2 times per week (3 d intervals) for a total of 8 treatments, with the skin lightly abraded prior to each treatment and evaluated at weeks 2, 4, 8, and 12 after treatment. The final analysis showed an average decrease in skin loss counts of 46% at week 4 of the follow-up and 81% at week 12 of the follow-up. The results also indicate that the treatment has good effect on severe acne patients. But the physical therapy generally needs special equipment and is not suitable for home self-help treatment of people.

Therefore, the current research on the use of drugs or cosmetics that can be carried around and used at any time to treat acne is a hot direction.

Firstly, antibiotic therapeutic drugs are used for treating acne. Antibiotics currently used for oral administration for the treatment of acne include tetracyclines, macrolides, lincomycins, nitroimidazoles, sulfonamides and the like. Of these, tetracyclines and macrolides are the most commonly used for the treatment of moderate to severe acne. The problem of antibiotic resistance is questioned, especially in the long-term treatment of low dose, so that the antibiotic should not be used alone, and the drug should be stopped after the skin lesion is improved or another antibiotic rope should be used instead after the antibiotic is used for 2-3 months. Tetracyclines: has anti-inflammatory activity and inhibits the synthesis of PG and the expression of NO synthetase, and is the first choice of oral antibiotics recommended for treating acne. The first generation of tetracycline family, such as tetracycline, is limited in extent by its low absorption rate due to food-related effects, and its consumption on an empty stomach. The second generation tetracycline comprises minocycline, doxycycline, methacycline and the like, has the characteristics of low price, high gastrointestinal absorption rate, good water solubility and tissue permeability, high hemoglobin binding rate and long half-life period, and is recommended as the first choice drug 2 for acne antibacterial treatment by the international consensus on acne treatment. The side effects are gastrointestinal symptoms such as nausea, dizziness, vertigo, tinnitus, tooth staining and tetracycline teeth, and the tetracycline medicines are not suitable for children and pregnant women under 16 years old. (viii) macrolides: the main drugs for treating acne include erythromycin, clarithromycin, azithromycin, etc. Is suitable for patients who can not take tetracycline antibiotics, and has good curative effect on various skin lesions of acne. The application of the viaminate capsule and the clarithromycin to the treatment of the common acne, particularly the moderate and severe acne, is reported to have obviously enhanced effect, obvious curative effect and good patient compliance compared with the single use of the viaminate, and is worthy of popularization and application in clinic. The main adverse reactions are gastrointestinal reaction abdominal pain, abdominal distension and the like, and liver damage, ototoxicity and the like can occur in a small number of patients.

And the glucocorticoid has the functions of inhibiting androgen secretion caused by adrenal cortex hyperfunction, resisting inflammation and suppressing immunity. Is suitable for severe nodulocystic acne and inflammatory stage of acne conglobata and fulminant acne, is usually orally taken with small dose of prednisone, and is gradually reduced and stopped after the inflammation is relieved. The nodular cystic acne can be injected into glucocorticoid skin lesion. Also has good effect on treating cystic acne by local injection of triamcinolone acetonide needles. However, the hormone has limited inhibitory action on the P.acnes bacteria, and belongs to temporary solution and permanent solution.

Thirdly, the traditional Chinese medicine is used for treating acne. Traditional Chinese medicine of traditional Chinese medicine divides acne into lung channel wind-heat syndrome, stomach channel excess fire syndrome, qi and blood stasis syndrome, liver channel damp-heat syndrome and the like, and mainly clears lung and stomach blood heat in treatment, and different prescriptions are selected according to different syndromes. The oral Chinese patent medicines commonly used at present comprise Yiqing capsules, tanshinone and the like. 'Yiqing capsule' is a heart-fire-purging decoction prepared from 'jin kui Yao L ü e' and mainly comprises rhubarb, scutellaria and coptis, and has the functions of resisting bacteria, diminishing inflammation, soothing nerves and purging fire, thereby being effective in treating acne. The tanshinone is an ether extract of the traditional Chinese medicine salvia miltiorrhiza, has the functions of antibiosis, anti-inflammation and antiandrogen and weaker estrogen activity clinically, and is effective to various infectious diseases. The crowing red considers that the tanshinone is safe and effective for treating the acne. However, because the traditional Chinese medicine is developed by people, the traditional Chinese medicine needs to be carefully decocted and is not suitable for large-scale popularization and convenient use.

CN105853404A discloses a compound for treating acne and its application. The compound of the invention not only has obvious effect on acne, but also can remarkably reduce the side effect of tretinoin when being used together with the tretinoin. The inhibition effect on the p.acnes bacteria is not obvious and needs to be further improved.

Therefore, there is an urgent need to develop a simple and convenient medicine or cosmetic capable of treating acne with high efficiency.

Disclosure of Invention

The present invention addresses the need in the art for a compound that specifically treats acne.

The applicant surprisingly found that an enteropeptidase inhibitor in the prior art (see CN 201580007800.9) has the effect of inhibiting p.acnes, and on the basis, the applicant further modifies the structure of the enteropeptidase inhibitor, couples a specific membrane-penetrating peptide, and finally obtains the compound of the application with better effect of inhibiting p.acnes.

The present invention provides an improved compound which has a significantly improved inhibitory effect on p. The specific result is shown in formula (I).

Formula (I)

The TGERRSSAERERGPSGQ peptide coupled with the compound is a polypeptide invented by the applicant in the previous research, can penetrate through a cell membrane, and can be fused with the membrane so as to promote the drug to enter the cell.

Further, compositions comprising the compounds are also provided.

In an embodiment, the composition or combination includes a pharmaceutically acceptable carrier. In embodiments, the pharmaceutically acceptable carrier comprises an emulsion. In embodiments, the emulsion is an oil-in-water emulsion or a water-in-oil emulsion. In embodiments, the combination or combination comprises or is in the form of a cream (cream), lotion (deposition), suspension or aqueous solution.

In embodiments, compositions comprising a bacteriophage are provided. In embodiments, the composition is formulated for topical application to the skin (i.e., the composition is a topical composition). In an embodiment, the composition is a pharmaceutical composition.

In one aspect, a pharmaceutical composition is provided that includes a wild-type propionibacterium acnes bacteriophage and an isolated probiotic propionibacterium acnes bacterium. In embodiments, the composition further comprises a pharmaceutically acceptable carrier.

In one aspect, a pharmaceutical composition is provided that includes a bacteriophage and/or an isolated probiotic propionibacterium acnes bacterium and a pharmaceutically acceptable carrier.

In embodiments, the pharmaceutical composition is formulated for topical application to the skin. In embodiments, the pharmaceutically acceptable carrier comprises an emulsion. In embodiments, the emulsion is an oil-in-water emulsion or a water-in-oil emulsion. In embodiments, the pharmaceutical composition is in the form of a cream, lotion, suspension or aqueous solution.

In embodiments, the composition or combination comprises at least about 2, 3, 4, 5, 6, 7, 8, 9, or 10 propionibacterium acnes phages. In embodiments, the propionibacterium acnes bacteriophage comprises more than one type of propionibacterium acnes bacteriophage.

In embodiments, the combination or composition comprising the isolated probiotic propionibacterium acnes bacteria may further comprise at least one additional bacteria.

Advantageous effects

The compound shown in the formula (I) can be effectively used for treating acne, has no toxic or side effect, and has a good application prospect.

Detailed Description

The technical scheme of the invention is described by combining specific embodiments. The experimental materials not particularly emphasized in the following examples are all conventional experimental materials, and are not particularly required, and are all conventional materials readily available to those skilled in the art.

Example 1 synthesis of P.acnes inhibiting compounds (of formula I)

A)2- (6-hydroxy-4-methyl-2, 3-dihydrobenzofuran-3-yl) acetic acid

10% Palladium on carbon (40mg) was added to a solution of 2- (6-hydroxy-4-methylbenzofuran-3-yl) acetic acid (200mg) in methanol (3mL), and the mixture was stirred at room temperature for 24 hours under a hydrogen atmosphere. Insoluble material was filtered off, and the resulting filtrate was concentrated under reduced pressure to give the title compound a.

B) (2S) -2- (2- (6-hydroxy-4-methyl-2, 3-dihydrobenzofuran-3-yl) acetamide) succinic acid di-tert-butyl ester

Di-tert-butyl (S) -2-aminosuccinate hydrochloride (357mg), WSC hydrochloride (279mg), HOBt. H2O (223mg), and diisopropylethylamine (0.508 mL) were added to a mixture of 2- (6-hydroxy-4-methyl-2, 3-dihydrobenzofuran-3-yl) acetic acid (202mg) and DMF (3mL) at room temperature, and the resulting mixture was stirred at the same temperature as above overnight. The reaction mixture was distilled with water, followed by extraction with ethyl acetate. The extract was washed with 1M hydrochloric acid and brine, then dried over anhydrous magnesium sulfate, and the solvent was distilled under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound B.

C) Di-tert-butyl (2S) -2- (2- (6- ((4-guanidinobenzoyl) oxy) -4-methyl-2, 3-dihydrobenzofuran-3-yl) acetamide) succinate trifluoroacetate

4-guanidinobenzoyl chloride hydrochloride (129mg) was added in two portions to a mixture of di-tert-butyl (2S) -2- (2- (6-hydroxy-4-methyl-2, 3-dihydrobenzofuran-3-yl) acetamide) succinate (120mg), pyridine (0.15 mL) and NMP (0.15 mL) at 50 ℃, and the resulting mixture was stirred at the same temperature as above overnight. The reaction mixture was concentrated under reduced pressure and the residue was purified by HPLC (C18, mobile phase: water/acetonitrile (system with 0.1% TFA)). The solvent was distilled off from the desired fraction under reduced pressure to give the title compound C.

D) N- ((6- ((4-formamidinebenzoyl) oxy) -4-methyl-2, 3-dihydro-1-benzofuran-3-yl) acetyl) -L-aspartic acid

A mixture of di-tert-butyl (2S) -2- (2- (6- ((4-guanidinobenzoyl) oxy) -4-methyl-2, 3-dihydrobenzofuran-3-yl) acetamide) succinate trifluoroacetate (87mg) and TFA (0.5 mL) was stirred at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure and the residue was purified by HPLC (C18, mobile phase: water/acetonitrile (system with 0.1% TFA)). The solvent was distilled off from the desired fraction under reduced pressure. An aqueous solution (2mL) of ammonium acetate (18.9 mg) was added dropwise to the residue, and the mixture was stirred at room temperature for 1 hour. The resulting precipitate was collected by filtration to give final compound D25.3 mg.

E) Adding 1mmol of compound D, 3mmol of O-benzotriazole-N, N, N ', N' -tetramethyl lode tetrafluoro boric acid vinegar (TBTU), 7ml of DMF and nitrogen protection into a 50m reaction bottle, dropwise adding 0.75mmol of N, N-diisopropylhexylamine value (DIEA), stirring at 30 ℃ for 2h, adding 10mmol of cell membrane cracking peptide (TGERRSSAERERGPSGQ), stirring at 36 ℃ for 3.5h, and terminating the reaction. After the correct molecular weight was confirmed using MS-IT-TOF, the crude product was purified using HPLC to give a purified product with a purity of 98.77%. Obtaining the structural formula of the coupled conjugate through structural analysis, wherein the structural formula is shown as a formula (I):

formula (I)

EXAMPLE 2 Activity assay of Compounds of formula (I)

1. Preparation of the bacterial suspension

To be purchasedP.acnesInoculating standard strain ATCC11827 to plate culture medium, culturing at 37 deg.C for 72 hr, washing with sterile normal saline, diluting the bacterial suspension with sterile normal saline, and adjusting to 1 × 10⁸CFU/mL, spare.

2. Preparation of pharmaceutical solutions

Taking the compound of the formula (I) prepared in the example 1, dissolving the compound with DMSO, and preparing 3 solutions with the concentrations of 100, 50 and 10 mu g/mL for later use; the polypeptide (TGERRSSAERERGPSGQ) was dissolved in DMSO at a concentration of 10. mu.g/mL with Metronidazole and Compound D.

3. Growth inhibition test

Preparing solid culture medium, adding 20 mL of the culture medium to each plate when the temperature of the preheated culture medium is reduced to 45 deg.C, and sucking the bacterial suspension (1 × 10) under aseptic condition⁸CFU/mL) 100. mu.L, and spread evenly on the cooled and solidified medium with a spreading bar. And lightly placing the oxford cup on the surface of the culture medium by using sterile forceps, and lightly pressing the oxford cup to ensure good contact. Respectively taking 200 mu L of 3 drug solutions with different concentrations, adding the drug solutions into an Oxford cup, carrying out anaerobic culture in a constant-temperature incubator at 37 ℃ for 72 h, taking out the drug solutions, accurately measuring the diameter (mm) of an effective bacteriostatic circle of the test solution in each culture dish by using a vernier caliper, and calculating the average value. Each concentration was repeated 4 times, and a control group was prepared: blank control (medium), the effect on bacterial growth was observed. Antibacterial effect judgment standard: the diameter of the bacteriostatic circle is less than 6 mm, and the drug resistance is achieved; the diameter of the inhibition zone is 6-10 mm, and the inhibition zone is slightly sensitive; the diameter of the inhibition zone is 10-14 mm, and the inhibition zone is moderate and sensitive; the diameter of the inhibition zone is 15-20 mm, and the inhibition zone is highly sensitive; zone diameters > 20 mm are extremely sensitive. The results are shown in table 1 below.

Table 1 results of in vitro bacteriostatic experiments on p.acnes with compounds

Medicine	Diameter of bacteriostatic circle (mm)
		Compound of formula (I) 100. mu.g/mL	28.54±1.38**
50 μ g/mL of the compound of formula (I)	25.43±1.02**
		10 μ g/mL of the Compound of formula (I)	22.21±0.98**
Metronidazole 10 mug/mL	10.43±0.72*
		Compound D10. mu.g/mL	13.25±0.13*
Polypeptide (TGERRSSAERERGPSGQ) 10. mu.g/mL	3.11±0.09
		Blank group	0

P <0.05, P <0.01, compared to blank group

The results of the growth inhibition experiment Oxford cup suggest that the compound of the formula (I) and the positive control drug metronidazole have antibacterial activity on P. acnes, the diameter of the inhibition zone is larger than l 0mm, the sensitivity is strong, the diameter of the inhibition zone of the compound of the formula (I) at 10 microgram/mL is larger than 20 mm, the compound of the formula (I) is extremely sensitive, and the diameter of the inhibition zone of the positive control drug metronidazole is 10-14 mm, and the compound of the formula (I) is moderately sensitive. The positive control group was statistically significant (P < 0.05) compared to the blank control group, while the 3 concentrations of the compound were significantly different (P < 0.01) compared to the blank control group. The diameter comparison of the inhibition zones shows that the compound of the formula (I) has stronger inhibition effect on P. acnes and has better application prospect. From the result, the diameter of the inhibition zone of the polypeptide is not large, the polypeptide is preliminarily considered to form a membrane-permeable channel by combining with a cell membrane based on the functional analysis of the polypeptide, cytoplasm is leaked out, and the purpose of inhibiting bacteria is achieved.

4. Minimum Inhibitory Concentration (MIC) determination-drug-based agar dilution method

The compound was aspirated with a sterile pipette,respectively injecting into 10mL sterile test tubes, and sequentially adding sterile culture medium (temperature) with different volumes<45 deg.C, mixing the final liquid medicine concentrations of 100, 10, 1, 0.1, and 0.01 μ g/mL, cooling to obtain solid inclined plane containing liquid medicine, and sucking bacterial suspension (1 × 10)⁸CFU/mL) 0.1mL was run over the slant from top to bottom and medium was used as a negative control. After anaerobic culture at 37 ℃ for 72 h, growth of P. acnes was observed. The above steps were repeated 3 times, and the lowest dilution concentration of the test tube which had no bacterial growth at all was found from each tube as the MIC. The results are shown in Table 2.

MIC (μ g/mL) results for P.acnes for the compounds of Table 2

As can be seen from Table 2, P.acnes only grew colonies in the negative and 0.01. mu.g/mL-dosed tubes, and no P.acnes colonies were grown in the remaining tubes, indicating that the MIC was 0.01. mu.g/mL.

Example 3 Rabbit ear acne model test

1. Construction of rabbit ear acne model

New Zealand rabbits were coated with 0.5 mL of coal tar 1 time a day for 1 week continuously at the opening of the ear canal inside the ear in the range of 2 cm × 2 cm. Then, 5 spots of rabbit ears were injected with 10. mu.l of 1X 10 concentration⁸And (3) continuously coating 0.5 mL of coal tar for 1 time every day in the same range of 2 cm multiplied by 2 cm at the opening of the ear canal on the inner side of the ear for 1 week by using CFU/mL P.acnes bacterial suspension, and successfully constructing an ear acne model of the rabbit and the rabbit through microscopic examination.

2. Drug coating test

The rabbits successfully molded are randomly divided into a model group, an experimental group, a metronidazole group and a normal control group. The experimental group is coated with 0.1 mu g/mL compound of formula (I) and 0.1mL metronidazole (10 mu g/mL) at a concentration of 0.1 mu g/mL and the model group and normal control group are coated with a blank control without drugs. The above groups are applied 2 times daily for 3 weeks. 24 hours after the last administration, a drug-coated ear specimen (whole skin layer) was prepared by a punch, fixed with a 10% formaldehyde solution, and prepared conventionally, stained with hematoxylin-eosin, examined for histopathological changes under an optical microscope, and subjected to photomicrography. The histological determination standard of the experimental acne is marked as (-) without acne, marked as (+), slightly keratinized hair follicle and slightly hyperplastic sebaceous gland or no obvious hyperplastic hair follicle, slightly enlarged hair follicle area, medium-amount keratinized substances and slightly hyperplastic sebaceous gland in the funnel part, marked as (+ +), obviously enlarged hair follicle area, large amount of keratinized substances in the hair follicle area and obviously enlarged diameter of the sebaceous gland, marked as (+ ++). The specific administration results are shown in table 3 below.

Results of histopathological changes of the Compounds to the rabbit ear acne model

Denotes P <0.05 compared to model group.

As can be seen from the results in table 3, the experimental group can greatly change the histopathological change condition of the acne model, and can greatly improve the cure rate, and the metronidazole group can also improve the histopathological characteristics, but has a certain gap compared with the experimental group. This indicates that the compounds of the present invention have superior therapeutic effects.

Example 4 toxicity test

By using the 7 d feeding method, 3 dose groups were set, 100mg/kg (high dose group), 10mg/kg (medium dose group), 1mg/kg (low dose group), and a blank control group (deionized water of the same volume) was set. Mice were divided into 4 groups of 10 mice each, based on body mass and sex. After fasting (without water) for 12 h, the medicine is taken, the administration volume is 10 mL/kg and 1 time/d, the medicine is continuously administrated by gastric lavage for 7 d, and the condition that obvious abnormal symptoms appear from the end of the experiment after the medicine is taken is observed. And 8 d, collecting peripheral blood of all mice by an eyeball picking method, performing autopsy on heart, liver, lung and kidney organs, weighing, and calculating organ coefficients (mg/g), wherein the results show that compared with a blank group, the liver coefficient difference of the high, medium and low dose groups is not obvious, other organ coefficients do not have obvious difference (P is more than 0.05) between the blank group and the dose group, and each organ is normal and has no obvious organic lesion, so that the compound has better safety.

It is to be understood that the invention is capable of embodiments in addition to those described and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein, as well as the abstract, are for the purpose of description and should not be regarded as limiting.

As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.

Claims

1. A compound for treating acne is characterized in that the structural formula of the compound is shown as the formula (I),

formula (I).

2. A medicament for the treatment of acne characterized by comprising a compound according to claim 1.

3. The medicament of claim 2, further comprising a pharmaceutically acceptable carrier.

4. Use of a compound of claim 1 in the manufacture of a medicament for inhibiting propionibacterium acnes.

5. Use of a compound of claim 1 for the preparation of a cosmetic for inhibiting propionibacterium acnes.

6. Use according to claim 5, wherein the cosmetic form is an emulsion.

7. The use according to claim 6, wherein the emulsion is an oil-in-water emulsion or a water-in-oil emulsion.

8. Use according to claim 5, characterized in that the cosmetic product is in the form of a cream, lotion, suspension or aqueous solution.