Peptides having preventive or therapeutic activity against atopic dermatitis

Abstract

The present invention relates to a peptide exhibiting anti-inflammatory function, a fusion compound containing the same, and a medicine, cosmetic, food, medical device, etc. containing the same. [Solution] The present invention has revealed that the RMSP1 peptide of sequence number 1 and its variants not only exhibit low cytotoxicity and significantly reduce the cellular inflammatory response induced by lipopolysaccharides, but also exhibit wound healing efficacy.

Description

[Technical Field]

[0001] The present invention relates to a peptide exhibiting activity in preventing and / or treating atopic dermatitis and a composition containing the same, and relates to applications in medicines, quasi-drugs, medical devices, cosmetics, etc. [Background technology]

[0002] Atopic dermatitis (AD) is a chronic skin disease characterized by dry skin, keratinization, and itching. It affects 0.5-1% of the general population, especially 5-10% of children, and has been increasing in number in recent years. The area affected by atopic dermatitis exhibits a significant increase in the infiltration of immune-related cells, such as macrophages, mast cells, and Th lymphocytes. Patients with atopic dermatitis also exhibit significantly elevated blood IgE levels. This is due to an increase in the number of Th2 cells, and the IL-4 secreted by these cells stimulates B lymphocytes to promote IgE secretion. Therefore, atopic dermatitis is classified as a Th2-type skin disease associated with an abnormality in the immune system. Atopic dermatitis inflicts physical and mental pain on patients, as well as significant economic damage, yet no specific cure for this disease has yet been discovered. Currently, steroids, antihistamines, etc. are used as treatments for atopic dermatitis, but long-term use of these drugs can cause serious side effects, so alternative drugs are needed. Summary of the Invention [Problem to be solved by the invention]

[0003] An object of the present invention is to provide a novel peptide for preventing and / or treating atopic dermatitis, which is safe and stable for the living body and can be used in cosmetics, pharmaceuticals, etc. Another object of the present invention is to provide cosmetics, pharmaceutical compositions, medical devices, foods, etc., which contain peptides for the prevention and / or treatment of atopic dermatitis. [Means for solving the problem]

[0004] In order to achieve the above object of the present invention, the inventors selected and tested a number of candidate peptides derived from humans. As a result, they found that a peptide consisting of 5 to 25 consecutive amino acids selected from the 31 amino acids 519 to 549 of the human SP100 protein, 5'-DVENNSTLEKHSGKRRKKRKRRHRSKVNGLQRG-3' (SEQ ID NO: 40), exhibits low cytotoxicity and significantly reduces the cellular inflammatory response induced by lipopolysaccharides, and also exhibits efficacy in wound healing and amelioration of atopic dermatitis. The above mutations do not change the overall activity of the molecule.

[0005] The inventors have referred to this peptide, consisting of 15 amino acids, LEKHSGKRRKKRRRHR (SEQ ID NO: 1; a peptide consisting of amino acids 526 to 540 of human SP100 protein), as "RMSP1" or "RMSP1 peptide" in the following description of the present invention, and have designated 12 representative sequences among the other peptides consisting of consecutive amino acids as RMSP1-1 to RMSP1-12, respectively. They have tested that peptides of various lengths and sequences have the effect of reducing or treating cellular inflammatory responses, and exhibit efficacy in wound healing and improving atopic dermatitis.

[0006] Furthermore, the peptides according to the present invention can be modified by phosphorylation, sulfation, acylation, glycation, methylation, panesylation, and the like.

[0007] The peptide or a fragment thereof of the present invention can be conjugated with a biocompatible polymer or a fatty acid to form a conjugate. The biocompatible polymer can be one or more selected from the group consisting of starch, dextran, chitosan, glycol chitosan, pullulan, chondroitin sulfate, hyaluronic acid, pectin, polylactic acid (PLA), polyglycolide (PGA), polycaprolactone (PCL), poly(caprolactone-lactide) random copolymer (PCLA), etc., but is not limited thereto. The fatty acid can be one or more selected from the group consisting of hexanoic acid, caprylic acid, capric acid, lauric acid, palmitic acid, stearic acid, and cholesterol, but is not limited thereto.

[0008] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention belongs.

[0009] The present invention provides a) an RMSP1 peptide consisting of SEQ ID NO: 40; b) a peptide for preventing or ameliorating atopic dermatitis selected from RMSP1 mutant peptides containing one or more mutations selected from the group consisting of amino acid substitution, amino acid addition, and amino acid deletion, wherein the amino acid deletions include 10 or less, 9 or less, 8 or less, 7 or less, 6 or less, 5 or less, 4 or less, 3 or less, 2 or less, or 1 amino acid deletion.

[0010] The present invention also relates to a peptide for preventing or ameliorating atopic dermatitis, characterized in that the peptide for preventing or ameliorating atopic dermatitis has a wound treatment effect.

[0011] The present invention also relates to a peptide for preventing or ameliorating atopic dermatitis, wherein the amino acid substitution in b) above is a conservative amino acid substitution.

[0012] The present invention also relates to a peptide for preventing or ameliorating atopic dermatitis, characterized in that the conservative amino acid substitutions are such that the arginine residue positions of SEQ ID NO: 1 are independently substituted with lysine residues or the lysine residue positions of SEQ ID NO: 1 are substituted with arginine residues.

[0013] The present invention also relates to a peptide for preventing or ameliorating atopic dermatitis, in which the amino acid deletion of b) is one to ten arginine and lysine residues among the amino acids of the RMSP1 peptide.

[0014] The present invention also relates to a peptide for preventing or ameliorating atopic dermatitis, wherein the peptide for preventing or ameliorating atopic dermatitis comprises one or more of: i) an RMSP1 peptide; ii) an amino acid substitution sequence of the RMSP1 peptide; iii) a sequence in which an amino acid is deleted from the RMSP1 peptide sequence; iv) a sequence in which an amino acid is added to the RMSP1 peptide sequence; v) a sequence in which an amino acid has been substituted or deleted from the RMSP1 peptide; vi) a sequence in which an amino acid has been substituted, added or deleted from the RMSP1 peptide; vii) a sequence in which an amino acid has been substituted or added from the RMSP1 peptide; and viii) a sequence in which an amino acid has been substituted or added from the RMSP1 peptide; In addition, examples include sequences in which the peptides i) to viii) are repeated two or more times, and other examples include peptides or proteins for preventing or ameliorating atopic dermatitis that are composed of sequences in which one or more peptides from i) to viii) are combined and / or repeated. However, it will be obvious to those skilled in the art to which this invention pertains that the peptides or proteins for preventing or ameliorating atopic dermatitis of the present invention are not limited to the examples given above.

[0015] The present invention also relates to a peptide for preventing or ameliorating atopic dermatitis, characterized in that the peptide for preventing or ameliorating atopic dermatitis is composed of two or more, preferably 2 to 100, more preferably 2 to 50, peptides having the same sequence or different sequences linked together.

[0016] The present invention also relates to a fusion compound comprising a peptide for preventing or ameliorating atopic dermatitis, to which a functional molecule is bound at one or more of the N-terminus and C-terminus of the peptide for preventing or ameliorating atopic dermatitis.

[0017] The present invention also relates to a fusion compound containing a peptide for preventing or ameliorating atopic dermatitis, characterized in that the functional molecule is a therapeutic peptide such as a hormone, growth factor, neurotransmitter, or ion channel ligand, or a therapeutic protein such as various enzymes including superoxide dismutase, albumin, or antibody.

[0018] The present invention also relates to a fusion compound comprising a peptide for preventing or ameliorating atopic dermatitis, wherein the functional molecule is, for example, a molecule that exhibits antioxidant function such as peroxiredoxin, anti-inflammatory function such as interleukin, or wound healing function.

[0019] The present invention also relates to a pharmaceutical composition for preventing or treating diseases, comprising the peptide for preventing or ameliorating atopic dermatitis or a fusion compound in which a functional molecule is bound to one or more of the N-terminus and C-terminus of the peptide for preventing or ameliorating atopic dermatitis. The diseases include, but are not limited to, skin inflammation such as atopic dermatitis. In particular, the pharmaceutical composition of the present invention is useful for preventing and treating dermatitis, particularly atopic dermatitis, and wounds and inflammation caused by trauma, such as cuts, wounds, and abrasions.

[0020] The present invention also relates to a cosmetic composition comprising the peptide for preventing or ameliorating atopic dermatitis, or a fusion compound in which a functional molecule is bound to at least one of the N-terminus and C-terminus of the peptide for preventing or ameliorating atopic dermatitis. The cosmetic composition can alleviate inflammation and heal wounds in the case of skin wounds, thereby preventing and ameliorating atopic dermatitis. The cosmetic composition of the present invention can include basic cosmetics such as lotions, creams, essences, oil-in-water or water-in-oil emulsions, and ointments, as well as color cosmetics such as foundations, lipsticks, and eye shadows.

[0021] The present invention also relates to a food composition that exhibits the function of preventing or improving atopic dermatitis and / or the function of wound healing, which comprises one or more of the above-mentioned peptides for preventing or improving atopic dermatitis, or a fusion compound in which a functional molecule is bound to one or more of the N-terminus and C-terminus of the above-mentioned peptides for preventing or improving atopic dermatitis.

[0022] In addition, the present invention relates to a medical device selected from a wound dressing, a filler, or a composite filler, which comprises one or more of the peptides for preventing or ameliorating atopic dermatitis, or a fusion compound in which a functional molecule is bound to one or more of the N-terminus and C-terminus of the peptide for preventing or ameliorating atopic dermatitis.

[0023] As used herein, "conservative substitution" refers to a modification of a cargo molecule transport domain that involves replacing one or more amino acids with amino acids having similar biochemical properties that does not result in loss of biological or biochemical function of the cargo molecule transport domain.

[0024] As used herein, a "conservative amino acid substitution" refers to a substitution in which an amino acid residue is replaced with an amino acid residue having a similar side chain. Classes of amino acid residues having similar side chains have been defined and are well known in the art. These classes include amino acids with basic side chains (e.g., lysine, arginine, histidine), amino acids with acidic side chains (e.g., aspartic acid, glutamic acid), amino acids with uncharged polar side chains (e.g., glycine, asparagine, glutamine, serine, threonine, tyrosine, cysteine), amino acids with nonpolar side chains (e.g., alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan), amino acids with β-branched side chains (e.g., threonine, valine, isoleucine), and amino acids with aromatic side chains (e.g., tyrosine, phenylalanine, tryptophan, histidine).

[0025] The peptides for preventing or ameliorating atopic dermatitis according to the present invention are understood to include variants in which one or more amino acids of the RMSP1 peptide have been mutated by substitution, deletion, and / or addition.

[0026] Furthermore, the variants of the peptides for preventing or ameliorating atopic dermatitis according to the present invention are understood to include variants of cargo molecule transport domains or fragments thereof that have substantially the same function and / or effect as the cargo molecule transport domains according to the present invention and have an amino acid sequence identity of 80% or 85% or more, preferably 90% or more, and more preferably 95% or more.

[0027] Furthermore, even if the peptide of the present invention for preventing or ameliorating atopic dermatitis has conservative amino acid substitutions, amino acid deletions, or amino acid additions, it is expected that it will still have activity for preventing or ameliorating atopic dermatitis.

[0028] The present invention is also characterized in that the functional molecule is selected from proteins, peptides, nucleic acids such as oligonucleotides and polynucleotides, carbohydrates, lipids, and mixtures of one or more of these.

[0029] Furthermore, the present invention is characterized in that the chemical bond between the functional molecule and the peptide for preventing or ameliorating atopic dermatitis is a covalent bond or a non-covalent bond, preferably a covalent bond. The chemical bond may be a covalent bond or a non-covalent bond. Non-covalent bonds may include ionic bonds, bonds due to electrostatic attraction, or bonds due to hydrophobic interactions. Furthermore, the substance capable of binding to the anti-inflammatory peptide via an ionic bond or electrostatic attraction may be a charged substance such as DNA or RNA.

[0030] The peptides for preventing or ameliorating atopic dermatitis of the present invention are not limited to SEQ ID NOs: 1 to 13, but for the convenience of experiments, representative peptides are exemplified in Table 1.

[0031] Furthermore, pharmaceutical compositions containing the peptide for preventing or ameliorating atopic dermatitis of the present invention or the fusion compound of the peptide for preventing or ameliorating atopic dermatitis with a functional molecule as an active ingredient can be formulated with a carrier commonly accepted in the pharmaceutical field and formulated in a variety of forms, such as topical skin preparations, oral preparations, sprays, patches, or injections, using conventional methods. For example, oral compositions include tablets and gelatin capsules, which contain, in addition to the active ingredient, diluents (e.g., lactose, dextrose, sucrose, mannitol, sorbitol, cellulose, and / or glycine), lubricants (e.g., silica, talc, stearic acid and its magnesium or calcium salt, and / or polyethylene glycol), and tablets preferably further contain binders (e.g., magnesium aluminum silicate, starch paste, gelatin, methylcellulose, sodium carboxymethylcellulose, and / or polyvinylpyrrolidone), and optionally disintegrants (e.g., starch, agar, alginic acid, or its sodium salt), or a boiling mixture and / or absorbents, colorants, flavors, and sweeteners. The compositions for injection are preferably isotonic aqueous solutions or suspensions, and the compositions mentioned are sterilized or sterile and contain auxiliary substances (e.g., preservatives, stabilizers, wetting agents or emulsifiers, dissolution promoters, salts for regulating osmotic pressure and / or buffers). They may also contain other therapeutically useful substances.

[0032] The pharmaceutical preparations prepared in this manner can be administered orally or parenterally, i.e., intravenously, subcutaneously, intraperitoneally, or topically, depending on the purpose. The daily dose is 0.0001 to 100 mg / kg, and can be administered once or several times in divided doses. The dosage for a particular patient can be varied depending on the patient's weight, age, sex, health condition, administration time, administration method, excretion rate, severity of disease, etc.

[0033] The term "food" as used herein refers to a natural or processed product containing one or more nutrients, preferably one that has undergone some processing step to be ready for direct consumption. In its usual sense, it includes all of the following: foods, food additives, functional foods, health functional foods, dietary supplements, and beverages. The food compositions of the present invention can be prepared in the form of various beverages, gums, teas, confectioneries, vitamin complexes, dietary supplements, and the like, but are not limited to these. The preferred intake amount of the food composition of the present invention varies depending on the condition, weight, and severity of symptoms of the consumer, the food form, and the intake period, and can be appropriately selected. For optimal effects, it is preferable to ingest the active ingredient of the food composition of the present invention at a dose of 0.2 mg / kg to 200 mg / kg per day.

[0034] Furthermore, a pharmaceutical composition for preventing or treating diseases, which contains as an active ingredient the peptide for preventing or ameliorating atopic dermatitis or a fusion composition in which the peptide for preventing or ameliorating atopic dermatitis is bound to a functional molecule, is characterized as being a topical skin preparation for treating skin inflammation. The topical application containing the peptide for preventing or ameliorating atopic dermatitis of the present invention or a fusion composition to which a functional molecule is attached as an active ingredient can be easily produced in any form by a conventional manufacturing method. For example, when producing a cream-type topical application, the anti-inflammatory composition of the present invention is incorporated into a typical oil-in-water (O / W) or water-in-oil (W / O) cream base, and fragrances, chelating agents, pigments, antioxidants, preservatives, etc. are added as needed, and synthetic or natural materials such as proteins, minerals, and vitamins can also be used in combination to improve physical properties.

[0035] In addition, unless otherwise specified, the terms used in this specification, claims and drawings are used in the sense commonly used by a person having ordinary skill in the technical field to which the present invention belongs.

[0036] [Table 1] [Effects of the Invention]

[0037] The anti-inflammatory peptide of the present invention not only exhibits low cytotoxicity and significantly reduces cellular inflammatory responses induced by polysaccharides, but also exhibits efficacy in wound healing and atopy treatment. Therefore, peptides for preventing and / or improving atopic dermatitis and compounds containing the same can be used in medicines for inflammation including dermatitis, cosmetics, food compositions for preventing or alleviating inflammation, wound healing agents, fillers or composite fillers, etc. [Brief explanation of the drawings]

[0038] [Figure 1] Predicted secondary structure of the RMSP1 peptide. (a) is the secondary structure of the peptide predicted using the Pep-fold3 program, and (b) is a graph showing the peptide Pepfold. [Figure 2] 1 shows reverse-phase HPLC data showing the purity of the RMSP1 peptide. [Figure 3] Figure 1 shows the efficacy of SP100 peptide in wound healing: (a) shows the healing of wounds induced by scratch assay over time, and (b) shows a graph of the extent of wound closure. [Figure 4] FIG. 1 shows the anti-inflammatory efficacy of RMSP1. [Figure 5] This figure shows the results of evaluating the efficacy of RMSP1 peptide in treating atopy. (a) Photographs of the untreated control group (Con), the oxazolone-treated atopy-induced group (Oxa), and the oxazolone-treated atopy-induced group (RMSP1) treated with RMSP1. (b) shows the weight of ear biopsies of the same area taken from each group. (c) Photographs of stained longitudinal sections of ear tissue and a graph of dermal thickness measured using ImageJ. [Figure 6] FIG. 1 shows the results of gene analysis of ear tissues from an atopic animal model. [Figure 7]To confirm whether efficacy can be maintained or improved by mutating, substituting, or deleting amino acids in the RMSP1 peptide, RMSP1 mutants were treated with RAW264.7 macrophages and their anti-inflammatory efficacy was evaluated. The results showed that the anti-inflammatory efficacy was maintained, and that some mutants exhibited increased anti-inflammatory efficacy. [Figure 8] This figure shows a comparison of the efficacy of RMSP1 after attaching the cell-penetrating peptides AD or MR to the N-terminal end and then acetylating or palmitoylating it. As a result, palmitoylated pal-RMSP1 showed the highest anti-inflammatory efficacy, and AD-RMSP1, which has the AD cell-penetrating peptide attached, showed higher inhibitory efficacy than MR-RMSP1. [Figure 9] This figure shows the anti-inflammatory efficacy of a peptide palmitoylated at the N-terminus of RMSP1 using skin cells. HaCaT cells were treated with TNF-α and IFN-γ to induce the expression of inflammatory genes, and the anti-inflammatory efficacy of pal-RMSP1 was then tested. The results showed that inflammatory genes were suppressed at different concentrations by TNF-α, IL-8, CCL-5, CCL-17, and CCL-22. DETAILED DESCRIPTION OF THE INVENTION

[0039] The present invention will be described in more detail with reference to the following specific examples. However, it will be obvious to those skilled in the art that the scope of the present invention is not limited to the description of the examples.

[0040] 1. Cell Culture

[0041] HaCaT and RAW264.7 cells were cultured in DMEM medium supplemented with 10% fetal bovine serum (FBS) and antibiotic solution (100 units / ml penicillin, 100 μg / ml streptomycin). Culture conditions were maintained at 37°C, 95% humidity, and 5% CO2. When cells reached 70-80% adherence to the culture dish, they were subcultured by trypsin-EDTA treatment. HaCaT cells were provided by Professor Kim Tae-yoon's laboratory at the Catholic University of Japan, and RAW264.7 cells were provided by Professor Kim Sang-beom's laboratory at the College of Pharmacy, Samyook University. 2. Synthesis of peptides such as RMSP1 for the prevention or treatment of atopic dermatitis

[0042] The peptides for preventing or treating atopic dermatitis, such as RMSP1, of the present invention were synthesized using 2-chlorotrityl chloride resin and amino acids using a standard Fmoc-SPPS (solid-phase peptide synthesis) protocol. The peptides were then cleaved from the resin, and the side-chain protecting groups were removed from the amino acids using TFA acid, water, and triisopropylsilane. Ether was added for precipitation, and the peptides were purified using reverse-phase HPLC on a C18 column. Elution was performed with a linear water-acetonitrile gradient (0 to 75% (v / v) of acetonitrile) containing 0.1% (v / v) TFA. To remove TFA, the peptides were dissolved in water and 100 mM HCl was added to prepare a HCl concentration of 8 mM. The solution was incubated at room temperature for 5 minutes, frozen in liquid nitrogen, and lyophilized overnight to remove all liquid. The lyophilized powder was redissolved in HCl solution, re-frozen, and then lyophilized overnight. Lyophilization was repeated three times to redissolve the peptides. After the final lyophilization step, the peptide was redissolved in water and the molecular weight of the purified peptide was confirmed using LC / MS. The results are shown in Figure 2.

[0043] 3. Prediction of secondary structure of RMSP1 peptide To predict the peptide structure of RMSP1, we used the PEP-FOLD3 de novo peptide structure prediction program. The amino acid sequence of RMSP1 was input, and the model predicted by the program was used to visualize the 2D predicted structure using the PyMOL 2.4 program [Figure 1(a)]. The prediction profile used to analyze the secondary structure prediction showed (a) helix, (b) extended, and (c) coil, from which the secondary predicted model was derived [Figure 1(b)].

[0044] 4. Evaluation of inflammation suppression To evaluate the anti-inflammatory efficacy of the peptides of the present invention for the prevention or treatment of atopic dermatitis from RAW264.7 macrophages, 5x10 cells were cultured in a 24-well plate 12 hours before the start of treatment. 4 A total of 100 RAW264.7 cells were attached to the wells. The cells were then cultured in serum-free medium for 1 hour and then treated with 10 μM peptide for 2 hours. Each well was then treated with 100 ng / ml of lipopolysaccharide (LPS). After 4 hours, the medium was collected and centrifuged at 1,000 g for 10 minutes. IL-6 and TNF-α were then detected.

[0045] The results of the IL-6 analysis are shown in Figures 4 and 7, and the results of the TNF-α analysis are shown in Figure 8.

[0046] 5. Cellular Wound Healing Experiments To confirm the wound healing efficacy of the peptide for preventing or treating atopic dermatitis of the present invention using HaCaT skin cells, a scratch assay was performed. 2 × 10 HaCaT cells were cultured in a 24-well plate. 5 After attaching each well, wounds were induced in the rats using a 200μL pipette tip. The cells were then washed twice with serum-free medium and treated with peptides at various concentrations in serum-free medium. Cell images were taken using a microscope after 0 and 24 hours, and the wound area was measured and analyzed using the ImageJ program.

[0047] The results of examining the efficacy of wound healing using skin cells are shown in Figure 3. (a) is an image showing the efficacy of the present peptide RMSP1 for preventing or treating atopic dermatitis on wound healing over time. (b) is a graph showing the extent of wound closure.

[0048] 6. Atopic Rat Animal Model The therapeutic effect of atopic dermatitis was evaluated using the peptide RMSP1 of the present invention for preventing or treating atopic dermatitis in an atopic rat animal model. 2% oxazolone was dissolved in a solvent with a 4:1 ratio of acetone to olive oil, and 10 μl of the solution was applied to the inner and outer ears. After 7 days, 10 μl of 0.5% oxazolone was applied to the inner and outer ears. In the case of the peptide for preventing or treating atopic dermatitis of the present invention, 10 μg of the peptide was applied to the surface of the outer ear daily for the number of days indicated, starting one day after sensitization.

[0049] The rats were sacrificed on day 10, and the weight of the ear tissue was measured using a 5 mm biopsy punch. The tissue was then fixed in 4% paraformaldehyde (PFA) solution and paraffin sections were prepared at 5 μm. Representative photographs were taken using H&E staining, and the thickness of the dermis layer was then measured using Caseviewer.

[0050] FIG. 5(a) shows a photograph of rat ears treated with the peptide for preventing or treating atopic dermatitis of the present invention after applying oxazolone to the ears as described above to induce atopy, and FIG. 5(b) shows the results of measuring the weight of the rat ears of the same area. FIG. 5(c) shows a photograph of a stained longitudinal section of ear tissue and a graph of the dermal thickness using ImageJ. 7. Genetic analysis of atopic animal models

[0051] For qPCR, ear tissue from an atopic animal model was obtained using a 5 mm biopsy punch. RNA was extracted using the Rneasy kit, followed by cDNA synthesis. Expression levels of each gene were then measured using the primers listed in Table 2 and SYBR Green reagent. Relative expression levels were confirmed using the anti-β-actin gene. The results are shown in Figure 6.

[0052] [Table 2]

[0053] 8. Confirmation of the anti-inflammatory effect of Pal-RMSP1 Gene expression of inflammatory cytokines was analyzed from HaCaT human skin keratinocytes. 3x10 HaCaT cells were cultured in each well of a 6-well plate. 5 Cells were allowed to attach and cultured for 24 hours. Afterwards, the cells were washed with serum-free medium, cultured for 16 hours in serum-free medium, and then treated with 1 or 10 μM peptide for 2 hours. Each well was treated with 10 mg / ml of TNF-α or IFN-γ and cultured for 6 hours. The cells were washed with PBS, and RNA was isolated using the EZ Total RNA Miniprep Kit (Enzynomics). Then, cDNA was synthesized using the TOPscript cDNA Synthesis Kit (Enzynomics). The expression levels of each gene were measured using the primers listed in Table 3 and the PowerUp SYBR Green Master Mix (Applied Biosystems) reagent. Relative expression levels were assessed using the antigen-expressing gene GADPH.

[0054] As a result, using skin cells, we confirmed the anti-inflammatory efficacy of a peptide palmitoylated at the N-terminus of RMSP1. We confirmed that inflammatory genes were suppressed by TNF-α, IL-8, CCL-5, CCL-17, and CCL-22 at different concentrations. The results are shown in Figure 9.

[0055] [Table 3]

Claims

1. A peptide for preventing or treating atopic dermatitis, characterized by being selected from one or more of the following 13 peptides. No. 1 RMSP1 peptide Amino acid sequence LEKHSGKRRKKRRHR (15 amino acids) Positions in human SP100 protein [526-540] No. 2 RMSP1-1 peptide Amino acid sequence: GKRRKKRRHR (10 amino acids) Positions in human SP100 protein [531-540] No. 3 RMSP1-2 peptide Amino acid sequence HSGKRRKKRRHR (12 amino acids) Position in human SP100 protein [529-540] No. 4 RMSP1-3 peptide Amino acid sequence: GKRRKKRRHRSK (12 amino acids) Positions in human SP100 protein [531-542] No. 5 RMSP1-4 peptide Amino acid sequence: LEKHSGKRRKKR (12 amino acids) Positions in human SP100 protein [526-537] No. 6 RMSP1-5 peptide Amino acid sequence: LEKHSGKRRKKRRHRSKVN (19 amino acids) Positions in human SP100 protein [526-544] No. 7 RMSP1-6 peptide Amino acid sequence: NSTLEKHSGKRRKKRRHR (18 amino acids) Position in human SP100 protein [523-540] No. 8 RMSP1-7 peptide Amino acid sequence: DVENNSTLEKHSGKRRKKRRHR (22 amino acids) Position in human SP100 protein [519-540] No. 9 RMSP1-8 peptide Amino acid sequence: GKRRKKRRHRSKVNGLQRG (18 amino acids) Positions in human SP100 protein [531-549] No. 10 RMSP1-9 peptide Amino acid sequence: DVENNSTLEKHS (12 amino acids) Position in human SP100 protein [519-530] No. 11 RMSP1-10 peptide Amino acid sequence: DVENNSTLEKHSGKRRKKR (19 amino acids) Position in human SP100 protein [519-530] No. 12 RMSP1-11 peptide Amino acid sequence: LEKHS (5 amino acids) Positions in human SP100 protein [526-530] No. 13 RMSP1-12 peptide Amino acid sequence LEKHSGKRR (9 amino acids) Positions in human SP100 protein [526-534]

2. A pharmaceutical composition for preventing or treating skin inflammation, comprising a fusion compound containing the peptide for preventing or treating atopic dermatitis according to claim 1.

3. A pharmaceutical composition for preventing or treating a disease characterized in that the skin inflammation according to claim 1 is atopic dermatitis.

4. A cosmetic composition comprising a fusion compound containing the peptide for preventing or treating atopic dermatitis according to claim 1.

5. A food composition comprising a fusion compound containing the peptide for preventing or treating atopic dermatitis according to claim 1.

6. A medical device comprising a fusion compound containing the peptide for preventing or treating atopic dermatitis according to claim 1, wherein the medical device is selected from a wound dressing, a filler, or a composite filler.

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