Ceramide derivatives having agonistic effects on epidermal cannabinoid receptors, and pharmaceutical or cosmetic composition containing same

Abstract

The present invention relates to a novel pseudoceramide derivative, a pharmaceutically acceptable salt thereof or a solvate thereof, and a pharmaceutical or cosmetic composition containing the same as an active ingredient. The novel pseudoceramide derivative of the present invention is expected to be very useful for treating or preventing skin diseases by activating cannabinoid receptors. In addition, the novel pseudoceramide derivative, the pharmaceutically acceptable salt thereof or the solvate thereof, of the present invention, has a simple synthesis process compared with a known cannabinoid receptor antagonist so as to reduce processing time and curtail material costs, and thus is economical, and has advantages such as easy emulsification during the formulation of cosmetic products or medical supplies.

Claims

1. A pseudoceramide compound of the following chemical formula (1), or a pharmaceutically acceptable salt thereof: ##STR00008## wherein R.sub.1 is hydrogen or a hydroxy(C1-C10)alkyl, R.sub.2 is a (C1-C10)alkyl, and m and n are integers of 1 to 10.

2. The pseudoceramide compound of claim 1 or the solvates thereof, which is selected from the following compounds: ##STR00009## or a pharmaceutically acceptable salt thereof.

3. A pharmaceutical composition, comprising the pseudoceramide compound or the pharmaceutically acceptable salt thereof or the solvate thereof of claim 1 as an active ingredient and a pharmaceutically acceptable carrier.

4. A cosmetic composition, comprising the pseudoceramide compound or the pharmaceutically acceptable salt or the solvates thereof of claim 1 and a cosmetically acceptable carrier.

5. A pharmaceutical composition, comprising the pseudoceramide compound or the pharmaceutically acceptable salt thereof or the solvates thereof of claim 2 as an active ingredient and a pharmaceutically acceptable carrier.

6. A cosmetic composition, comprising the pseudoceramide compound or the pharmaceutically acceptable salt or the solvates thereof of claim 2 and a cosmetically acceptable carrier.

7. A method for treating a skin disease, comprising administering an effective amount of the pseudoceramide compound of claim 1 or a pharmaceutically acceptable salt thereof to a subject in need thereof, wherein the skin disease is selected from the group consisting of atopic dermatitis, psoriasis, contact dermatitis, eczematous dermatitis, photodermatitis, seborrheic dermatitis, dermatitis herpetiformis, lichen planus, lichen sclerosus, pyoderma gangrenosum, pemphigus, and epidermolysis bullosa.

8. A method for alleviating a skin disease, comprising applying an effective amount of the pseudoceramide compound of claim 1 or a pharmaceutically acceptable salt thereof to skin of a subject in need thereof, wherein the skin disease is selected from the group consisting of atopic dermatitis, psoriasis, contact dermatitis, eczematous dermatitis, photodermatitis, seborrheic dermatitis, dermatitis herpetiformis, lichen planus, lichen sclerosus, pyoderma gangrenosum, pemphigus, and epidermolysis bullosa.

9. A method for treating a skin disease, comprising administering an effective amount of the pseudoceramide compound or a pharmaceutically acceptable salt thereof of claim 2 to a subject in need thereof, wherein the skin disease is selected from the group consisting of atopic dermatitis, psoriasis, contact dermatitis, eczematous dermatitis, photodermatitis, seborrheic dermatitis, dermatitis herpetiformis, lichen planus, lichen sclerosus, pyoderma gangrenosum, pemphigus, and epidermolysis bullosa.

10. A method for alleviating a skin disease, comprising applying an effective amount of the pseudoceramide compound or a pharmaceutically acceptable salt thereof of claim 2 to skin of a subject in need thereof, wherein the skin disease is selected from the group consisting of atopic dermatitis, psoriasis, contact dermatitis, eczematous dermatitis, photodermatitis, seborrheic dermatitis, dermatitis herpetiformis, lichen planus, lichen sclerosus, pyoderma gangrenosum, pemphigus, and epidermolysis bullosa.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a graph illustrating agonistic activities of compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention against a cannabinoid receptor, evaluated using a method according to Example 3,

(2) FIG. 2(A) and (B) are graphs illustrating suppression effects of the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention on activation of mast cells by ionomycin, evaluated using a method according to Example 4,

(3) FIG. 3(A) and (B) are graphs illustrating suppression effects of the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention on activation of the mast cells by IgE antibody and antigen, evaluated using a method in Example 5,

(4) FIG. 4 is a graph illustrating suppression effects of the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention on activation of mast cells by protease activated receptor 2 (PAR-2) in Example 6,

(5) FIG. 5 is a graph illustrating cytotoxicity of the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention at each concentration in Example 7,

(6) FIG. 6 is a graph illustrating influences of the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention on proliferation of mast cells in Example 8,

(7) FIG. 7(A) and (B) are photos and a graph illustrating repair effects of the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention on skin damage in an atopic dermatitis-induced animal model in Example 9,

(8) FIG. 8(A) and (B) are a graphs illustrating decrease effects of the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention on concentrations of histamine (B) and IgE antibody (A) in the blood in an atopic dermatitis-induced animal model in Example 10,

(9) FIG. 9 is a view illustrating that invasion of mast cells is suppressed in a lesion site in an atopic dermatitis-induced animal model by a method according to Example 11, using the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention, and

(10) FIG. 10 is a graph illustrating that the number of mast cells present in the skin of an atopic dermatitis-induced animal model by the method according to Example 11, using the compounds CBS004 (Example 2) and CBS007 (Example 1) according to the present invention.

BEST MODE

(11) A novel ceramide derivative and a pharmaceutical or cosmetic composition containing the same according to the present invention will be described in detail below. Here, technical terms and scientific terms used in the present specification have the general meaning understood by those skilled in the art to which the present invention pertains unless otherwise defined, and a description for the known function and configuration unnecessarily obscuring the gist of the present invention will be omitted in the following description.

(12) The present invention provides a novel ceramide derivative represented by the following Chemical Formula 1, and a pharmaceutically acceptable salt or solvate thereof.

(13) ##STR00003##

(14) (R.sub.1 is hydrogen or hydroxy(C1-C10)alkyl, R.sub.2 is (C1-C10)alkyl, and m and n are integers of 1 to 10.)

(15) The novel ceramide derivative represented by Chemical Formula 1 and the pharmaceutically acceptable salt or solvate thereof according to the present invention may be selected from the following compounds, but are not limited thereto.

(16) ##STR00004##

(17) Synthesis of the ceramide derivative represented by Chemical Formula 1 and the pharmaceutically acceptable salt or solvate thereof is not particularly limited. For example, a general Synthesis Reaction Formula was illustrated below, and the ceramide derivative represented by Chemical Formula 1 and the pharmaceutically acceptable salt or solvate thereof may be prepared by an organic reaction known in the art.

(18) ##STR00005##

(19) In addition, the present invention provides a pharmaceutical composition for treating or preventing a skin disease, containing a novel ceramide derivative represented by Chemical Formula 1, or a pharmaceutically acceptable salt or solvate thereof as an active ingredient.

(20) In the pharmaceutical composition for treating or preventing a skin disease, the skin disease may be one or more selected from the group consisting of atopic dermatitis, allergic rhinitis, psoriasis, contact dermatitis, eczematous dermatitis, photodermatitis, seborrheic dermatitis, dermatitis herpetiformis, lichen planus, lichen sclerosus, pyoderma gangrenosum, pemphigus, epidermolysis bullosa, angioedema, blepharitis, allergic conjunctivitis, degenerative or inflammatory ophthalmitis, arthritis, rheumatoid arthritis, spondylitis, systemic sclerosis, dermatomyositis, polymyositis, inflammatory muscle diseases, acquired immune deficiency syndrome (AIDS), leprosy, Sezary syndrome, inflammatory bowel diseases, stress diseases, and transplant rejection.

(21) A preferable dose of the pharmaceutical composition according to the present invention may be variously prescribed depending on factors such as a formulation method, an administration method, an age, a weight, sex, a disease state of a patient, foods, an administration time, an administration route, an excretion rate, and response sensitivity. For example, a daily dose of the pharmaceutical composition according to the present invention may be 0.001 to 100 mg/kg.

(22) The pharmaceutical composition may be orally or parenterally administered, and in the case of parenteral administration, the pharmaceutical composition may be intravenously or subcutaneously injected, or transdermally administered, or the like.

(23) The pharmaceutical composition according to the present invention may contain a pharmaceutically acceptable carrier. The pharmaceutically acceptable carrier contained in the pharmaceutical composition according to the present invention, which is generally used at the time of preparation, includes lactose, dextrose, sucrose, sorbitol, mannitol, starches, acacia rubber, calcium phosphate, alginate, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose, water, syrup, methyl cellulose, methylhydroxybenzoate, propylhydroxybenzoate, talc, magnesium stearate, mineral oil, and the like, but is not limited thereto. The pharmaceutical composition according to the present invention may additionally include a lubricant, a wetting agent, a sweetener, a flavoring agent, an emulsifier, a suspending agent, a preservative, or the like, in addition to the above components.

(24) The pharmaceutical composition according to the present invention may be prepared in a unit dose form or prepared in a form in which the pharmaceutical composition is input into a multi-dose container by being formulated into a general formulation using the pharmaceutically acceptable carrier and/or the excipient according to a method capable of being easily performed by those skilled in the art to which the present invention pertains. The general formation means, for example, oral formulations (tablets, capsules, powders) and formulations for sublingual, rectal, intravaginal, nasal, topical or parenteral administration (including intravenous, intracavernosal, intramuscular, subcutaneous, and intratubular administration). For example, the compound according to the present invention may be orally or sublingually administered in a tablet form containing starch or lactose, a capsule form containing only the compound according to the present invention or containing an excipient in addition to the compound, or an elixir or suspension form containing a chemical for flavor or color. A liquid formulation is prepared together with a pharmaceutically acceptable additive such as a suspending agent (for example, methylcellulose, semi-synthetic glycerides such as Witepsol, glyceride mixture such as a mixture of apricot kernel oil and polyethylene glycol (PEG)-6 ester or a mixture of PEG-8 and caprylic/capric glyceride). Further, in the case in which the pharmaceutical composition is parenterally, for example, intravenously, intracavernosally, intramuscularly, subcutaneously, and intratubularly injected, it is most preferable that the pharmaceutical composition is used in a sterile aqueous solution form. In this case, the solution may contain other materials (for examples, salts or polysaccharides such as mannitol or glucose) so as to be isotonic with blood.

(25) More specifically, the pharmaceutical composition according to an exemplary embodiment of the present invention may be used in a form of tablets, pills, capsules, granules, powders, solutions, patches, transdermal absorption patches using a microneedle, or injections.

(26) The ceramide derivative represented by Chemical Formula 1 according to the present invention may be used in a form of the pharmaceutically acceptable salt, and as the salt, an acid addition salt formed by a pharmaceutically acceptable free acid may be used. The acid addition salt is obtained from inorganic acids such as hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, hydrobromic acid, hydroiodic acid, nitrous acid, or phosphorous acid, non-toxic organic acids such as aliphatic mono- and di-carboxylate, phenyl-substituted alkanoates, hydroxy alkanoates, and alkanedioates, aromatic acids, aliphatic and aromatic sulfonic acids, and organic acids such as acetic acid, benzoic acid, citric acid, lactic acid, maleic acid, gluconic acid, methanesulfonic acid, 4-toluenesulfonic acid, tartaric acid, fumaric acid. Examples of these pharmaceutically non-toxic salts may include sulfate, pyrosulfate, bisulfate, sulfite, bisulfite, nitrate, phosphate, mono-hydrogen phosphate, dihydrogen phosphate, metaphosphate, pyrophosphate chloride, bromide, iodide, fluoride, acetate, propionate, decanoate, caprylate, acrylate, formate, isobutyrate, caprate, heptanoate, propiolate, oxalate, malonate, succinate, suberate, sebacate, fumarate, maleate, butyne-1,4-dionate, hexane-1,6-dionate, benzoate, chlorobenzoate, methylbenzoate, dinitro benzoate, hydroxybenzoate, methoxybenzoate, phthalate, terephthalate, benzene sulfonate, toluene sulfonate, chlorobenzene sulfonate, xylene sulfonate, phenylacetate, phenyl propionate, phenyl butyrate, citrate, lactate, β-hydroxybutyrate, glycolate, malate, tartrate, methanesulfonate, propanesulfonate, naphthalene-1-sulfonate, naphthalene-2-sulfonate or mandelate, but are not limited thereto.

(27) Since the ceramide derivative represented by Chemical Formula 1 has an agonistic activity against a cannabinoid receptor 1 (CB1R), the pharmaceutical composition according to an exemplary embodiment of the present invention is useful to treat diseases regulated by a cannabinoid receptor activation.

(28) In addition, the present invention provides a cosmetic composition for alleviating a skin disease, containing a novel ceramide derivative represented by Chemical Formula 1, or a pharmaceutically acceptable salt or solvate thereof as an active ingredient.

(29) In the cosmetic composition for alleviating a skin disease according to an exemplary embodiment of the present invention, the skin disease may be one or more selected from the group consisting of atopic dermatitis, allergic rhinitis, psoriasis, contact dermatitis, eczematous dermatitis, photodermatitis, seborrheic dermatitis, dermatitis herpetiformis, lichen planus, lichen sclerosus, pyoderma gangrenosum, pemphigus, epidermolysis bullosa, angioedema, blepharitis, allergic conjunctivitis, degenerative or inflammatory ophthalmitis, arthritis, rheumatoid arthritis, spondylitis, systemic sclerosis, dermatomyositis, polymyositis, inflammatory muscle diseases, acquired immune deficiency syndrome (AIDS), leprosy, Sezary syndrome, inflammatory bowel diseases, stress diseases, and transplant rejection.

(30) Hereinafter, preferred Examples of the present invention will be provided in order to assist in understanding of the present invention. However, the following Examples are provided only for easily understanding the present invention as illustrative examples, but the scope of the present invention is not limited thereto.

EXAMPLE 1

Preparation of (11Z)-2-((Z)-hexadec-7-enyl)-N-(1,3-dihydroxypropan-2-yl)-3-oxoicos-11-enamide (CBS007)

(31) ##STR00006##

Preparation of (4E)-4-((Z)-heptadec-8-enylidene)-3-((Z)-hexadec-7-enyl)oxetan-2-one

(32) 30 ml of toluene was put into a 100 ml reactor under nitrogen atmosphere and 2.3 ml of TEA (16.62 mmol) was added thereto. After a temperature of the reactor was cooled to 0° C. or less using an ice bath, 5.5 ml of Octanoyl chloride (16.62 mmol) was slowly added thereto dropwise. After dropwise addition was completed, the ice bath was removed, and the temperature of the reactor was slowly raised to room temperature, followed by stirring overnight. Purified water was added to the reactant, c-HCl was added thereto to adjust a pH to 3, and purified water and ethyl acetate were additionally added thereto, stirred, and allowed to stand, thereby separating an organic layer. After the organic layer was washed with brine once, dried over MgSO.sub.4, and filtered, the filtrate was concentrated under reduced pressure. The residue was separated using column chromatography (ethyl acetate:hexane=1:40), thereby obtaining (4E)-4-((Z)-heptadec-8-enylidene)-3-((Z)-hexadec-7-enyl)oxetan-2-one, which is an oleoylketenedimer, as a pale yellow liquid.

EXAMPLE 1

Preparation of (11Z)-2-((Z)-hexadec-7-enyl)-N-(1,3-dihydroxypropan-2-yl)-3-oxoicos-11-enamide (CBS007)

(33) 1.3 g of (4E)-4-((Z)-heptadec-8-enylidene)-3-((Z)-hexadec-7-enyl)oxetan-2-one (2.46 mmol) was dissolved in 13 ml of ethanol and 448 mg of serinol (4.92 mmol) was added thereto, followed by refluxing and stirring for 4 hours. A reaction was checked using thin layer chromatography (TLC), and the solvent was removed by concentration under reduced pressure. The ethylacetate and purified water were added to the concentrate and c-HCl was added thereto to adjust a pH to 3, followed by stirring and being allowed to stand, thereby separating an organic layer. The organic layer was dried over MgSO4, and a filtered filtrate was concentrated under reduced pressure, thereby completely removing the solvent. The residue was separated using column chromatography (dichloromethane:methanol=40:1), thereby obtaining a title compound (11Z)-2-((Z)-hexadec-7-enyl)-N-(1,3-dihydroxypropan-2-yl)-3-oxoicos-11-enamide (CBS007) (1.1 g, 1.77 mmol, 72% yield) as a pale yellow sticky liquid.

(34) MS (ESI pos. ion) m/z: 621 (MH+). Calc.d exact mass for C39H73NO4: 620. .sup.1H NMR (600 MHz, CDCl.sub.3): 6.87 (d, J=7.2 Hz, 1H), 5.38-5.30 (m, 4H), 3.95-3.91 (m, 1H), 5.85-3.82 (m, 2H), 3.80-5.75 (m, 2H), 3.40 (t, J=7.2 Hz, 1H), 2.58-2.50 (m, 2H), 2.04-1.95 (m, 8H), 1.85-1.80 (m, 2H), 1.64-1.54 (m, 4H), 1.30-1.20 (m, 40H), 0.88 (t, J=7.2 Hz, 6H).

EXAMPLE 2

Preparation of (11Z)-2-((Z)-hexadec-7-enyl)-N-(2-hydroxyethyl)-3-oxoicos-11-enamide (CBS004)

(35) ##STR00007##

(36) A title compound, (11Z)-2-((Z)-hexadec-7-enyl)-N-(2-hydroxyethyl)-3-oxoicos-11-enamide (CBS004) was obtained by a method similar to that in Example 1.

(37) MS (ESI pos. ion) m/z: 590 (MH+). Calc.d exact mass for C38H71NO3: 589.98. .sup.1H NMR (600 MHz, CDCl.sub.3): 6.76 (t, J=5.4 Hz, 1H), 5.37-5.31 (m, 4H), 3.71 (t, J=5.4 Hz, 2H), 3.43-3.40 (m, 3H), 2.56-2.52 (m, 2H), 2.02-1.98 (m, 9H), 1.83-1.78 (m, 2H), 1.65-1.62 (m, 3H), 1.58-1.54 (m, 2H), 1.32-1.22 (m, 37H), 0.88 (t, J=7.2 Hz, 6H).

EXAMPLE 3

cAMP Production Suppression by Cannabinoid Receptor Agonist According to the Present Invention

(38) cAMP production suppression efficacy by agonistic action of the synthesized materials was confirmed using CHO cells in which cannabinoid receptor 1 (CB1R) was over-expressed.

(39) The CHO cells in which the cannabinoid receptor 1 (CB1R) was over-expressed were purchased from Chantest, and cultured in an F-12 medium (Gibco) containing 10% fetal bovine serum (FBS, Gibco). In order to conform an agonistic activity of a ceramide derivative compounds according to the present invention on the cannabinoid receptor, the cells were plated in a 96-well dish, cultured for 24 hours, and then, treated at concentrations of 0, 0.781, 1.562, 3.125, 6.25, 12.5, 25, and 50 μM (0.1% DMSO in PBS). The cells were treated with 10 μM Forskolin (Sigma), thereby inducing cAMP production by adenylyl cyclase in the cells. A concentration of cAMP in the cells was measured using a HTRF cAMP assay kit purchased from Cisbio. After dissolving the cells with lysis buffer in the kit according to the manufacturer's manual, anti-cAMP cryptate conjugate and cAMP-d2 in the kit were treated at room temperature for 2 hours. Thereafter, fluorescence was measured at 665 nm and 620 nm and compensated by a ratio of 665 nm/620 nm, and then, the concentration of cAMP in the cells was measured using a standard curve. Since activity of adenylyl cyclase was suppressed when the cannabinoid receptor 1 (CB1R) was activated, the cannabinoid receptor agonist according to the present invention suppresses production of cAMP in the cells. As illustrated in FIG. 1, it may be confirmed that when the cells were treated with the compounds (CBS004 and CBS007) according to the present invention, the concentration of cAMP was decreased dependently on the concentration of the compound. As illustrated in the following Table 1, it may be confirmed that the novel cannabinoid receptor agonists according to the present invention activate the cannabinoid receptor 1 (CB1R) when EC50 was 24 to 26 μM.

(40) TABLE-US-00001 TABLE 1 Compounds EC50 (μM) Target Activity Modulation CBS004 24.2 CB1R +++ Agonist CBS007 26.7 CB1R ++ Agonist

EXAMPLE 4

Suppression Effect by Cannabinoid Receptor Agonist According to the Present Invention in Mast Cells Activated by Ionomycin

(41) In order to confirm whether or not the ceramide derivative compound according to the present invention suppresses activation of the mast cells, RBL-2H3 cells (rat basophilic leukemia cells) corresponding to one kind of mast cells were cultured in a DMEM medium containing 10% FBS in a 24-well plate, and then treated with the compound for 16 hours. In order to induce degranulation of the mast cells, the cells were treated with 2 μM ionomycin (Sigma), and after 30 minutes, concentrations of β-hexosaminidase and histamine released to the medium were measured. In detail, at the time of measuring the concentration of β-hexosaminidase, 50 μl of the medium was reacted together with 50 μl of p-nitrophenyl-nacetyl-β-d-glucosaminidine, (p-NAG, Sigma) at 37° C. for 2 hours, and then, the reaction was terminated by adding 200 μl of 0.2 M glycine (pH 10.6, Sigma). Absorbance at a wavelength of 405 nm was measured using a spectrometer. The concentration of histamine was measured using a HTRF histamine assay kit (Cisbio). 10 μl of a medium supernatant of the cells was treated with anti-histamine cryptate conjugate and histamine-d2 according to the manufacturer's manual at room temperature for 2 hours. Thereafter, fluorescence was measured at 665 nm and 620 nm and compensated by a ratio of 665 nm/620 nm, and then, the concentration of histamine in the cells was measured using a standard curve. As illustrated in FIG. 2, it was confirmed that when the mast cells were treated with the cannabinoid receptor agonists according to the present invention, release of β-hexosaminidase and histamine was suppressed in the mast cells activated by ionomycin. Anandamide (AEA), which is a CB1R agonist, was used as a positive control.

EXAMPLE 5

Suppression Effect by Cannabinoid Receptor Agonist According to the Present Invention in Mast Cells Activated by IgE Antibody and Antigen

(42) In order to confirm whether or not the ceramide derivative compound according to the present invention suppresses activities of the mast cells, RBL-2H3 cells (rat basophilic leukemia cells) corresponding to one kind of mast cells were cultured in a DMEM medium containing 10% FBS in a 24-well plate, and then treated with the compound for 16 hours. In order to induce degranulation of the mast cells, the cells were treated with IgE antibody (0.2 μg/ml) and NP-BSA (0.1 μg/ml) for 1 hour, and then, concentrations of β-hexosaminidase and histamine released to the medium were measured. In detail, at the time of measuring the concentration of β-hexosaminidase, 50 μl of the medium was reacted together with 50 μl of p-nitrophenyl-nacetyl-β-d-glucosaminidine, (p-NAG, Sigma) at 37° C. for 2 hours, and then, the reaction was terminated by adding 200 μl of 0.2 M glycine (pH 10.6, Sigma). Absorbance at a wavelength of 405 nm was measured using a spectrometer. The concentration of histamine was measured using a HTRF histamine assay kit (Cisbio). 10 μl of a medium supernatant of the cells was treated with anti-histamine cryptate conjugate and histamine-d2 according to the manufacturer's manual at room temperature for 2 hours. Thereafter, fluorescence was measured at 665 nm and 620 nm and compensated by a ratio of 665 nm/620 nm, and then, the concentration of histamine in the cells was measured using a standard curve. As illustrated in FIG. 3, it was confirmed that when the mast cells were treated with the cannabinoid receptor agonists according to the present invention, release of (β-hexosaminidase and histamine was suppressed in the mast cells activated by the IgE antibody. The suppression effect as described above was similar to or more excellent than that of ACEA, which is a well-known CB1R agonist.

EXAMPLE 6

Suppression Effect by Cannabinoid Receptor Agonist According to the Present Invention in Mast Cells Activated by Protease Activated Receptor-2 (PAR-2)

(43) The PAR-2, which is a receptor activated by protease (tryptase, chymase, and the like) present outside cells, induces degranulation on surfaces of the mast cells. In order to confirm whether or not the ceramide derivative compound according to the present invention suppresses activities of the mast cells by PAR-2, RBL-2H3 cells (rat basophilic leukemia cells) corresponding to one kind of mast cells were cultured in a DMEM medium containing 10% FBS in a 24-well plate, and then treated with the compound for 2 hours. Thereafter, in order to induce degranulation of the mast cells, the cells were treated with 10 μM SLIGRL peptide, which is a PAR-2 agonist, for 1 hour. The concentration of histamine released outside the cells was measured using a HTRF histamine assay kit (Cisbio). 10 μl of a medium supernatant of the cells was treated with anti-histamine cryptate conjugate and histamine-d2 according to the manufacturer's manual at room temperature for 2 hours. Thereafter, fluorescence was measured at 665 nm and 620 nm and compensated by a ratio of 665 nm/620 nm, and then, the concentration of histamine in the cells was measured using a standard curve. As illustrated in FIG. 4, it was confirmed that when the mast cells were treated with the cannabinoid receptor agonist according to the present invention, release of histamine in the mast cells activated by the PAR-2 agonist was suppressed. Therefore, the novel ceramide derivative according to the present invention, which is the novel cannabinoid receptor agonist, is a compound effectively suppressing the activities of the mast cells.

EXAMPLE 7

Evaluation of Cytotoxicity of Novel Cannabinoid Receptor Agonist According to the Present Invention

(44) In order to evaluate cytotoxicity of the ceramide derivative compound according to the present invention, on day 1, 5×10.sup.3 of RBL-2H3 mast cells were cultured in a DMEM medium containing 10% fetal bovine serum (FBS) in each well of a 96-well plate. After 24 hours, cells were treated with cannabinoid receptor agonists at each concentration and cultured in an incubator (37° C., 5% CO.sub.2) for 12 hours. In order to confirm living cells, 10 μl of 3-4,5-dimethylthhenyliazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT, Sigma) was added to the medium. After culturing the cells at 37° C. for 4 hours, the medium was removed. Then, after confirming that a color was purple when 100 μl of dimethyl sulfoxide (DMSO) was added thereto, absorbance was measured at a wavelength of 570 nm using a spectrometer. As illustrated in FIG. 5, since the number of living cells was not decreased even though the concentration of the synthesized material treated in the RBL-2H3 mast cells was increased, it may be appreciated that the ceramide derivative compound according to the present invention does not have toxicity to the mast cells, and when the ceramide compound derivative is used in human, the ceramide derivative compound is non-toxic.

EXAMPLE 8

Suppression Efficacy of Novel Cannabinoid Receptor Agonist According to the Present Invention on Cell Proliferation

(45) In order to confirm an influence of the ceramide compound derivative according to the present invention on cell proliferation, 5×10.sup.3 of RBL-2H3 mast cells were cultured in a DMEM medium containing 10% fetal bovine serum (FBS) in each well of a 96-well plate. After 24 hours, cells were treated with cannabinoid agonists (concentration: 25 μM) and cultured in an incubator (37° C., 5% CO.sub.2) for 48 hours. In order to confirm living cells, the number of cells was confirmed after 0, 2, 6, 24, and 48 hours by using 3-4,5-dimethylthhenyliazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT, Sigma) assay. In more detail, 10 μl of MTT was added to the medium, the cells were cultured at 37° C. for 4 hours. After removing the medium and confirming that a color was purple when 100 μl of dimethyl sulfoxide (DMSO) was added thereto, absorbance was measured at a wavelength of 570 nm using a spectrometer. As illustrated in FIG. 6, it may be appreciated that after the RBL-2H3 cells were treated with the ceramide derivative compound according to the present invention, the number of cells was decreased as compared to a case in which the RBL-2H3 cells were not treated with the ceramide derivative compound. Therefore, it may be concluded that the ceramide compound derivative according to the present invention may serve as a cannabinoid receptor agonist to suppress proliferation of the mast cells, thereby further decreasing the number of cells over time.

EXAMPLE 9

Suppression Function of Novel Compound According to the Present Invention in Oxazolone-Induced Atopic Dermatitis Animal Model

(46) In order to evaluate efficacy of the novel compound according to the present invention in an animal model, first, hairless mice were treated with oxazolone (Sigma), thereby establishing atopic dermatitis-like animal models. More specifically, on day 1, the mice were sensitized with 1% oxazolone in acetone on the back, and after 1 week, the mice were treated with 0.1% oxazolone in acetone on the back every other day for 2 weeks, thereby inducing atopic dermatitis-like symptoms. Thereafter, the compound (1%) according to the present invention was dissolved in a solution in which polyethylene glycol (PEG, Sigma) and ethanol were mixed with each other at a ratio of 7:3, and the mice were treated with the obtained compound solution on the back once in the morning and evening for 10 days. As illustrated in FIG. 7, it may be appreciated that in the skin treated only with a vehicle, atopic dermatitis was induced, such that the skin became significantly thick as compared to the normal skin, but in a compound-treated group, the skin thickness maintained similar to that of normal mice. In addition, a skin thickness of each of the animal models was measured and illustrated by a graph. When the atopic dermatitis model animal was treated with the compound according to the present invention, atopic dermatitis-like symptoms were significantly alleviated. Therefore, the compound according to the present invention may be effective to treat atopic dermatitis.

EXAMPLE 10

Alleviating Effect of Novel Compound According to the Present Invention on IgE and Histamine in Blood in Atopic Dermatitis Animal Model

(47) In order to evaluate efficacy of the novel compound according to the present invention in an atopic dermatitis animal model, after treating an oxazolone (Sigma)-induced atopic dermatitis animal model with the compound, concentrations of IgE antibody and histamine present in the blood were measured. The IgE and histamine in the blood are known as markers of atopic dermatitis and inflammatory dermatitis such as contact dermatitis, and as the disease aggregates, the concentrations thereof in the blood further increases. The increased IgE activated mast cells, and allowed the mast cells to release a large amount of inflammatory cytokines such as histamine. As illustrated in FIG. 8, it may be appreciated that when the atopic dermatitis animal model was treated with the compound according to the present invention, the concentrations of IgE and histamine in the blood were decreased. The result as described above indicates that the compound according to the present invention is effective to treat atopic dermatitis.

EXAMPLE 11

Suppression Effects of Novel Compound According to the Present Invention on Activities of Mast Cells in Atopic Dermatitis Animal Model

(48) In order to evaluate whether or not the novel compound according to the present invention suppresses the activities of mast cells in an atopic dermatitis animal model, first, hairless mice were treated with oxazolone (Sigma), thereby establishing an atopic dermatitis animal model. More specifically, on day 1, mice were sensitized with 1% oxazolone in acetone on the back, and after 1 week, the mice were treated with 0.1% oxazolone in acetone on the back every other day for 2 weeks, thereby inducing atopic dermatitis on the back skin of the mice. Thereafter, the compound (1%) according to the present invention was dissolved in a solution in which polyethylene glycol (PEG, Sigma) and ethanol were mixed with each other at a ratio of 7:3, and the mice were treated with the obtained compound solution on the back once in the morning and evening for 10 days. Then, skin biopsy was taken and stained with toluidine blue solution (Sigma), thereby confirming presence of mast cells. As illustrated in FIG. 9, in the normal skin, a small amount of mast cells were observed, but after atopic dermatitis-like symptom was induced, a large amount of mast cells were observed, as illustrated in a group treated only with a vehicle. The mast cells in the skin as described above release various kinds of inflammatory cytokines, thereby aggregating atopic dermatitis. On the contrary, it may be confirmed that on the skins of the mice treated with the compound according to the present invention, the number of mast cells was significantly decreased. The number of mast cells present on the skin in each of the groups was statistically analyzed and illustrated by a graph. As illustrated in FIG. 10, when the atopic dermatitis-like animal model was treated with the compound according to the present invention, the number of mast cells in the skin of the lesion site was decreased by about 30%. Therefore, when an atopic dermatitis patient is treated with the compound according to the present invention, the compound may suppress activities and proliferation of mast cells, such that the compound may be effective to treat atopic dermatitis.

INDUSTRIAL APPLICABILITY

(49) A novel ceramide derivative and a pharmaceutically acceptable salt or solvate thereof according to the present invention, which are excellent cannabinoid receptor agonists, may be synthesized using a simple synthesis process as compared to a cannabinoid receptor agonist according to the related art, and decrease a process time and a cost of a raw material, thereby having advantages of economical efficiency and ease of emulsification at the time of being formulated into a cosmetics or medicine.

(50) In addition, the novel ceramide derivative and the pharmaceutically acceptable salt or solvate thereof according to the present invention may act as a cannabinoid receptor agonist to suppress activities of mast cells, thereby being usefully used to treat and prevent a skin disease.

(51) Further, a cosmetic composition according to the present invention may contain a novel ceramide derivative, or a pharmaceutically acceptable salt or solvate thereof having an excellent agonistic effect on a cannabinoid receptor as an active ingredient, thereby making it possible to prevent and treat a skin disease.