CN113402583A - Qgk三肽及其应用 - Google Patents
Qgk三肽及其应用 Download PDFInfo
- Publication number
- CN113402583A CN113402583A CN202110681894.5A CN202110681894A CN113402583A CN 113402583 A CN113402583 A CN 113402583A CN 202110681894 A CN202110681894 A CN 202110681894A CN 113402583 A CN113402583 A CN 113402583A
- Authority
- CN
- China
- Prior art keywords
- qgk
- tripeptide
- mice
- induced
- inflammatory
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 208000022559 Inflammatory bowel disease Diseases 0.000 claims abstract description 9
- 239000003814 drug Substances 0.000 claims abstract description 5
- 235000013305 food Nutrition 0.000 claims abstract description 5
- XSBGUANSZDGULP-IUCAKERBSA-N Gln-Gly-Lys Chemical compound [H]N[C@@H](CCC(N)=O)C(=O)NCC(=O)N[C@@H](CCCCN)C(O)=O XSBGUANSZDGULP-IUCAKERBSA-N 0.000 claims abstract description 3
- 125000003275 alpha amino acid group Chemical group 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 5
- 239000008194 pharmaceutical composition Substances 0.000 claims description 4
- 239000004480 active ingredient Substances 0.000 claims description 2
- 239000002671 adjuvant Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000010532 solid phase synthesis reaction Methods 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 230000014509 gene expression Effects 0.000 abstract description 20
- 230000000770 proinflammatory effect Effects 0.000 abstract description 13
- 108020004999 messenger RNA Proteins 0.000 abstract description 11
- 229940079593 drug Drugs 0.000 abstract description 4
- 238000002474 experimental method Methods 0.000 abstract description 2
- 210000001072 colon Anatomy 0.000 description 30
- 241000699670 Mus sp. Species 0.000 description 29
- 210000001519 tissue Anatomy 0.000 description 27
- 230000000694 effects Effects 0.000 description 21
- TVZRAEYQIKYCPH-UHFFFAOYSA-N 3-(trimethylsilyl)propane-1-sulfonic acid Chemical compound C[Si](C)(C)CCCS(O)(=O)=O TVZRAEYQIKYCPH-UHFFFAOYSA-N 0.000 description 20
- 230000003110 anti-inflammatory effect Effects 0.000 description 18
- 210000004027 cell Anatomy 0.000 description 16
- 206010009887 colitis Diseases 0.000 description 15
- 102000004890 Interleukin-8 Human genes 0.000 description 11
- 108090001007 Interleukin-8 Proteins 0.000 description 11
- 206010061218 Inflammation Diseases 0.000 description 10
- 241000699666 Mus <mouse, genus> Species 0.000 description 10
- 230000001154 acute effect Effects 0.000 description 10
- 230000004054 inflammatory process Effects 0.000 description 10
- 108090000623 proteins and genes Proteins 0.000 description 10
- 102000004889 Interleukin-6 Human genes 0.000 description 9
- 108090001005 Interleukin-6 Proteins 0.000 description 9
- 108060008682 Tumor Necrosis Factor Proteins 0.000 description 9
- 102000000852 Tumor Necrosis Factor-alpha Human genes 0.000 description 9
- MZOFCQQQCNRIBI-VMXHOPILSA-N (3s)-4-[[(2s)-1-[[(2s)-1-[[(1s)-1-carboxy-2-hydroxyethyl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-(diaminomethylideneamino)-1-oxopentan-2-yl]amino]-3-[[2-[[(2s)-2,6-diaminohexanoyl]amino]acetyl]amino]-4-oxobutanoic acid Chemical compound OC[C@@H](C(O)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@@H](N)CCCCN MZOFCQQQCNRIBI-VMXHOPILSA-N 0.000 description 8
- 206010009900 Colitis ulcerative Diseases 0.000 description 8
- 201000006704 Ulcerative Colitis Diseases 0.000 description 8
- 238000001727 in vivo Methods 0.000 description 8
- GOZMBJCYMQQACI-UHFFFAOYSA-N 6,7-dimethyl-3-[[methyl-[2-[methyl-[[1-[3-(trifluoromethyl)phenyl]indol-3-yl]methyl]amino]ethyl]amino]methyl]chromen-4-one;dihydrochloride Chemical compound Cl.Cl.C=1OC2=CC(C)=C(C)C=C2C(=O)C=1CN(C)CCN(C)CC(C1=CC=CC=C11)=CN1C1=CC=CC(C(F)(F)F)=C1 GOZMBJCYMQQACI-UHFFFAOYSA-N 0.000 description 7
- 230000008859 change Effects 0.000 description 7
- 102000004127 Cytokines Human genes 0.000 description 6
- 108090000695 Cytokines Proteins 0.000 description 6
- 102000004169 proteins and genes Human genes 0.000 description 6
- 230000028327 secretion Effects 0.000 description 6
- 208000024891 symptom Diseases 0.000 description 6
- 208000016261 weight loss Diseases 0.000 description 6
- 230000004580 weight loss Effects 0.000 description 6
- 238000004113 cell culture Methods 0.000 description 5
- 230000003833 cell viability Effects 0.000 description 5
- 238000000338 in vitro Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 108091032973 (ribonucleotides)n+m Proteins 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000037396 body weight Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 210000004379 membrane Anatomy 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 210000000440 neutrophil Anatomy 0.000 description 4
- 238000003757 reverse transcription PCR Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 102000004190 Enzymes Human genes 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 3
- 239000012981 Hank's balanced salt solution Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000003321 amplification Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000002757 inflammatory effect Effects 0.000 description 3
- 230000003902 lesion Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- JUJBNYBVVQSIOU-UHFFFAOYSA-M sodium;4-[2-(4-iodophenyl)-3-(4-nitrophenyl)tetrazol-2-ium-5-yl]benzene-1,3-disulfonate Chemical compound [Na+].C1=CC([N+](=O)[O-])=CC=C1N1[N+](C=2C=CC(I)=CC=2)=NC(C=2C(=CC(=CC=2)S([O-])(=O)=O)S([O-])(=O)=O)=N1 JUJBNYBVVQSIOU-UHFFFAOYSA-M 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 238000001262 western blot Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 102000000541 Defensins Human genes 0.000 description 2
- 108010002069 Defensins Proteins 0.000 description 2
- 102100031181 Glyceraldehyde-3-phosphate dehydrogenase Human genes 0.000 description 2
- 208000032843 Hemorrhage Diseases 0.000 description 2
- 102000003777 Interleukin-1 beta Human genes 0.000 description 2
- 108090000193 Interleukin-1 beta Proteins 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 102000004005 Prostaglandin-endoperoxide synthases Human genes 0.000 description 2
- 108090000459 Prostaglandin-endoperoxide synthases Proteins 0.000 description 2
- 238000011529 RT qPCR Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 150000001413 amino acids Chemical group 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000010804 cDNA synthesis Methods 0.000 description 2
- 210000004953 colonic tissue Anatomy 0.000 description 2
- 239000002299 complementary DNA Substances 0.000 description 2
- 230000009089 cytolysis Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004925 denaturation Methods 0.000 description 2
- 230000036425 denaturation Effects 0.000 description 2
- 210000004443 dendritic cell Anatomy 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 108020004445 glyceraldehyde-3-phosphate dehydrogenase Proteins 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 210000004969 inflammatory cell Anatomy 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000006166 lysate Substances 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 210000004877 mucosa Anatomy 0.000 description 2
- 210000004400 mucous membrane Anatomy 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000026731 phosphorylation Effects 0.000 description 2
- 238000006366 phosphorylation reaction Methods 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 102000044503 Antimicrobial Peptides Human genes 0.000 description 1
- 108700042778 Antimicrobial Peptides Proteins 0.000 description 1
- 102100021943 C-C motif chemokine 2 Human genes 0.000 description 1
- 101710155857 C-C motif chemokine 2 Proteins 0.000 description 1
- 208000011231 Crohn disease Diseases 0.000 description 1
- 206010012735 Diarrhoea Diseases 0.000 description 1
- 206010012741 Diarrhoea haemorrhagic Diseases 0.000 description 1
- 238000012286 ELISA Assay Methods 0.000 description 1
- 238000008157 ELISA kit Methods 0.000 description 1
- 108010033040 Histones Proteins 0.000 description 1
- 102000013462 Interleukin-12 Human genes 0.000 description 1
- 108010065805 Interleukin-12 Proteins 0.000 description 1
- 206010024642 Listless Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 108010008705 Mucin-2 Proteins 0.000 description 1
- 102000007296 Mucin-2 Human genes 0.000 description 1
- 101000972289 Mus musculus Mucin-2 Proteins 0.000 description 1
- 102000018745 NF-KappaB Inhibitor alpha Human genes 0.000 description 1
- 108010052419 NF-KappaB Inhibitor alpha Proteins 0.000 description 1
- 102000003945 NF-kappa B Human genes 0.000 description 1
- 108010057466 NF-kappa B Proteins 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 238000002944 PCR assay Methods 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 206010038063 Rectal haemorrhage Diseases 0.000 description 1
- 210000001744 T-lymphocyte Anatomy 0.000 description 1
- 108091023040 Transcription factor Proteins 0.000 description 1
- 102000040945 Transcription factor Human genes 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000000427 antigen Substances 0.000 description 1
- 102000036639 antigens Human genes 0.000 description 1
- 108091007433 antigens Proteins 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000005667 attractant Substances 0.000 description 1
- 210000003719 b-lymphocyte Anatomy 0.000 description 1
- 210000004082 barrier epithelial cell Anatomy 0.000 description 1
- 230000002902 bimodal effect Effects 0.000 description 1
- 230000000975 bioactive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 238000003570 cell viability assay Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000031902 chemoattractant activity Effects 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 230000000112 colonic effect Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 210000004748 cultured cell Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000009266 disease activity Effects 0.000 description 1
- 210000004921 distal colon Anatomy 0.000 description 1
- 235000006694 eating habits Nutrition 0.000 description 1
- 230000004890 epithelial barrier function Effects 0.000 description 1
- 210000002919 epithelial cell Anatomy 0.000 description 1
- 230000008378 epithelial damage Effects 0.000 description 1
- 210000005081 epithelial layer Anatomy 0.000 description 1
- 239000012737 fresh medium Substances 0.000 description 1
- 238000003633 gene expression assay Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007490 hematoxylin and eosin (H&E) staining Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 210000002865 immune cell Anatomy 0.000 description 1
- 230000028993 immune response Effects 0.000 description 1
- 238000010874 in vitro model Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 208000027866 inflammatory disease Diseases 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 210000002490 intestinal epithelial cell Anatomy 0.000 description 1
- 210000004347 intestinal mucosa Anatomy 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 208000002551 irritable bowel syndrome Diseases 0.000 description 1
- 101150044508 key gene Proteins 0.000 description 1
- 208000017971 listlessness Diseases 0.000 description 1
- 210000002540 macrophage Anatomy 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010172 mouse model Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000065 noncytotoxic Toxicity 0.000 description 1
- 230000002020 noncytotoxic effect Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 230000001717 pathogenic effect Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 210000005259 peripheral blood Anatomy 0.000 description 1
- 239000011886 peripheral blood Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000000751 protein extraction Methods 0.000 description 1
- 230000005180 public health Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000013077 scoring method Methods 0.000 description 1
- 230000019491 signal transduction Effects 0.000 description 1
- 235000020183 skimmed milk Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000012192 staining solution Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 210000004876 tela submucosa Anatomy 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 230000000451 tissue damage Effects 0.000 description 1
- 231100000827 tissue damage Toxicity 0.000 description 1
- 231100000747 viability assay Toxicity 0.000 description 1
- 238000003026 viability measurement method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K5/00—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof
- C07K5/04—Peptides containing up to four amino acids in a fully defined sequence; Derivatives thereof containing only normal peptide links
- C07K5/08—Tripeptides
- C07K5/0815—Tripeptides with the first amino acid being basic
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/17—Amino acids, peptides or proteins
- A23L33/18—Peptides; Protein hydrolysates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Molecular Biology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Animal Behavior & Ethology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biochemistry (AREA)
- Genetics & Genomics (AREA)
- Biophysics (AREA)
- Mycology (AREA)
- Nutrition Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Pain & Pain Management (AREA)
- Rheumatology (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Peptides Or Proteins (AREA)
Abstract
本发明公开了一种QGK三肽，其氨基酸序列为Gln‑Gly‑Lys。通过试验验证发现本发明的QGK三肽能够有效降低促炎因子mRNA表达水平，具有一定的医学价值，可用于开发预防和/或辅助治疗炎症性肠病的食品或药物。
Description
技术领域
本发明属于生物技术领域，具体涉及生物活性肽领域，特别涉及QGK三肽及其应用。
背景技术
溃疡性结肠炎(UC)是一种慢性、特发性结肠粘膜炎症性疾病，起始于直肠，通常以连续性方式向近端直肠甚至结肠蔓延，临床症状以血性腹泻为典型。相比于克罗恩病，UC更为普遍。据统计，北美地区和北欧地区患病率最高，每10万人中就有9～20例溃疡性结肠炎患者，而南半球和东部地区国家患病率相对较低。近年来，随着饮食习惯西式化、人们生活压力增加，UC患病率显著上升，呈逐年递增趋势，这给公共卫生事业带来了沉重的负担。溃疡性结肠炎的发病率呈双峰型，主要发病高峰在15-30岁之间，第二个较小的发病高峰在50-70岁之间。
肠上皮细胞是抵御外来病原体的第一层物理屏障。正常状态下，上皮层被黏液层覆盖，黏膜层是宿主免疫细胞和腔内微生物之间的物理屏障，并结合抗菌肽(防御素)一起来帮助宿主抵御病原微生物入侵。而UC患者体内，某些结肠黏蛋白亚型(mucin-2)硫化物的合成减少，上皮屏障受损，通透性增加，黏膜反应异常。炎症期间持续的上皮损伤及防御素降低导致肠道菌群的暴露和炎症的放大(Frank,Amand,Feldman,Boedeker,Harpaz,&Pace,2007；Simms,Doecke,Walsh,Huang,Fowler,&Radford-Smith,2008)。肠道固有层由树突状细胞和巨噬细胞组成，它们将抗原呈递给B细胞和T细胞，进而激活获得新免疫反应。在UC患者中，激活和成熟的树突状细胞数量随着外部刺激的增加而增加，它们的数量与疾病的发展息息相关。
在本发明中，申请人公开了一种抗炎三肽的氨基酸序列，并检测了其在体外炎症模型和体内炎症模型中表现的抗炎效果，结果表明该三肽在体内体外均能抑制促炎因子的表达，具有良好的抗炎效果。
发明内容
本发明的目的是解决现有技术的不足，提供一种QGK三肽，其氨基酸序列为Gln-Gly-Lys，分子量为331Da。该QGK三肽通过固相合成法获得，能够有效预防并缓解炎症性肠病，可以应用在制备预防和/或缓解炎症性肠病的食品或药物中。
本发明的另一目的是提供一种药物组合物，其活性成分包括QGK三肽，用于预防和/或缓解炎症性肠病。该药物组合物还可以包括溶剂或可药用辅助剂。
本发明采用TNF-α诱导人肠上皮细胞(HT-29)体外炎症模型来研究在2、4、8、16mM的浓度该三肽的抗炎活性。测定典型细胞因子IL-8的含量，同时运用WST-1试剂盒测定细胞活力。本发明采用RT-PCR结合Western-blot，验证其抗炎作用机制。本发明采用DSS诱导Balb/c小鼠急性结肠炎模型，研究该三肽在体内的抗炎活性。
本发明的有益效果为：本发明提供了一种QGK三肽，通过试验验证发现本发明的QGK三肽能够有效降低促炎因子mRNA表达水平，具有一定的医学价值，可用于开发预防和/或辅助治疗炎症性肠病的食品或药物。
附图说明
图1所示为QGK对TNF-α诱导的HT-29细胞IL-8的分泌影响及其对细胞活力的影响情况图；
图2所示为QGK对TNF-α诱导的HT-29细胞因子mRNA表达水平的影响情况图；
图3所示为QGK对TNF-α诱导的HT-29细胞NF-κB通路中关键蛋白表达水平的影响情况图；
图4所示为QGK对小鼠的综合影响情况图，其中，(A)为QGK对DSS诱导的小鼠体重减轻的影响情况图，(B)为第14天各组小鼠体重变化情况图，(C)为QGK对DSS诱导的小鼠临床症状的影响情况图，(D)为QGK对DSS诱导的结肠长度的影响情况图；
图5所示为QGK对小鼠病变程度的影响情况图和个组小鼠结肠组织评分图，其中，(A)为QGK对DSS诱导的小鼠结肠组织病变程度的影响情况图，(B)为各组小鼠结肠组织评分图；
图6所示为QGK对DSS诱导的小鼠结肠组织中MPO表达水平的影响情况图；
图7所示为QGK对DSS诱导的小鼠结肠组织中促炎细胞因子TNF-α和IL-6含量的影响情况图；
图8所示为QGK对DSS诱导的小鼠结肠组织中促炎细胞因子mRNA表达水平的影响情况图。
具体实施方式
以下将结合实施例和附图对本发明的构思及产生的技术效果进行清楚、完整的描述，以充分地理解本发明的目的、方案和效果。
一、三肽QGK在体外炎症模型中抗炎活性的验证及其作用机制的探讨
1.炎症模型建立
以3×105cells/mL的密度将细胞种于细胞培养板上，每隔24h换液，培养5-7天待细胞融合到85％左右，弃去培养液，用HBSS缓冲液洗2次。首先加入用含5％FBS的DMEM-F12新鲜培养液配置的不同浓度的三肽样品预孵育2h，其次再向培养板中加入TNF-α(使其终浓度为5ng/mL)继续孵育4h。孵育结束后，收集细胞上清液用于ELISA测定，下层细胞可根据不同实验要求进行处理。
2.细胞活力测定
参考Mengya Zhang(Zhang et al.,2017；M.Zhang et al.,2018)等人所述方法对处理后细胞进行活力测定。实验细胞经HBSS清洗三次后，每孔加入等量WST-1稀释液均匀铺满细胞培养板，放入细胞培养箱中避光孵育15分钟左右，待溶液颜色变化显著时在450nm处测定OD值，按照如下公式计算细胞活力：
细胞活率(％)＝(As450/Ac450)x100％，其中，As450代表样品处理组，Ac450代表阴性未处理组。
3.IL-8含量测定
参考史雅凝等人(史雅凝，2015)的方法对IL-8含量进行测定。将样品稀释五倍后用于检测。
4.RNA-PCR检测
实验细胞经冰冷的HBSS清洗三次后，去除表面液体后加入适量TransZol裂解液，充分裂解后根据TransZOL Up Plus RNA Kit试剂盒提取HT-29中总RNA。通过测定A260/A280nm处比率评估RNA的浓度和纯度。采用Easy Script One-Step gDNARemoval and cDNASynthesis SuperMix试剂盒合成cDNA。RT-PCR使用Perfect StartTM Green qPCRSuperMix试剂盒进行扩增，其条件为94℃变性5s，60℃退火15s和72℃延伸10s。整个反应保持40个扩增循环，测定关键基因的表达变化，使用GAPDH作为内部参考基因，并以POS阳性模型组做对照，计算其他组Fold Change值表达百分比，引物序列如表1。
表1
5.蛋白免疫印迹
对培养好的细胞进行预处理获得变性总蛋白。细胞蛋白经10％SDS-PAG胶分离后转移至用甲醇激活的PVDF膜上，5％脱脂奶粉室温封闭1.5h。经洗涤后，将膜充分浸入一抗稀释液中4℃过夜孵育。经用洗涤后，再将膜充分浸入二抗稀释液中孵育1h。经洗涤后，取出PVDF膜至ChemiDocTMTouch仪器中，用移液器滴入ECL显色液进行显色，并拍照记录。采用Image J软件进行灰度分析，计算各组蛋白相对表达量。
二、采用体内模型对三肽QGK进行体内抗炎活性验证，并探讨其作用机制
1.小鼠急性结肠炎模型
将由湖南斯克莱景达公司提供的80只6-8周龄，平均体重为18-20g的健康雌性Balb/c小鼠圈养并饲养一周后进行试验。圈养温度为25-27℃，湿度为74％，12h周期的光照与黑暗交替，并自由获取食物和水。将小鼠随机分为10组，如下表2所述，其中每组10只小鼠。表2
2.小鼠结肠炎临床症状评估
参照Cooper(Cooper，Murthy,Shah,&Sedergran,1993)提出的疾病活动指数评分标准如表3，每日观察并评估小鼠体重变化，大便黏稠度和大便出血情况。
表3
DAI＝(体重指数评分+大便性状评分+出血情况)/3。
3.结肠组织HE评分
用生理盐水清洗远端结肠并用4％多聚甲醛固定，石蜡包埋并切片，用苏木精和伊红染色液进行染色，在光学显微镜下拍照并评估组织学评分。
4.结肠组织TNF-α、IL-6测定
用生理盐水清洗结肠组织，根据动物组织全蛋白提取试剂盒按照说明书提取结肠组织总蛋白，并用BCA蛋白定量试剂盒测定上清蛋白浓度，按照小鼠ELISA试剂盒测定TNF-α和IL-6促炎因子浓度，结果以POS作为对照计算相对百分比。
5.抗氧化酶MPO测定
用生理盐水清洗结肠组织，并进行组织匀浆，按照MPO试剂盒说明测定酶活，结果以POS作为对照计算相对百分比。
6.结肠组织中基因表达测定
用生理盐水清洗结肠组织，经液氮研磨后加入1mL Trizol裂解液裂解5min，12000rpm 4℃离心10min，根据试剂盒提取组织总RNA。采用Easy Script One-StepgDNARemoval and cDNA Synthesis SuperMix试剂盒合成cDNA。RT-PCR使用Perfect StartTMGreen qPCR SuperMix试剂盒进行扩增，其条件为94℃变性5s，60℃退火15s和72℃延伸10s。整个反应保持40个扩增循环。测定关键基因的表达变化，并使用GAPDH作为内部参考基因，并以POS阳性模型组做对照，计算其他组Fold Change值表达百分比，引物序列如表4所示。
表4
三、体外试验结果
1.三肽QGK的抗炎活性验证
IL-8是一种中性粒细胞引诱剂，可诱导中性粒细胞从外周血迁移到炎症组织，与健康人群相比，IBD患者的组织中IL-8的显著增加。因此选用IL-8作为炎症标志物，初步筛选可能具有抗炎活性的三肽(Mahida,Ceska,Effenberger,Kurlark,Lindley,&Hawkey,1992)。如图1所示，采用TNF-α诱导HT-29细胞炎症模型，通过对炎症标志物IL-8的测定，研究在2、4、8、16mM浓度下三肽QGK的抗炎活性。结合WST-1法测定其细胞活力，发现模型组与空白对照组之间细胞活力无显著性差异。经三肽预处理的HT-29炎症细胞有效抑制IL-8的分泌(p<0.05)且无细胞毒性。与模型组相比，当QGK浓度高达16mM时，IL-8分泌量分别下降了99％。
2.三肽QGK对TNF-α诱导的HT-29细胞细胞因子mRNA表达水平的影响
基于前期研究，发现QGK具有抗炎作用。为了进一步探讨其抗炎机制，采用RT-PCR技术对经三肽QGK(16mM)处理后的HT-29细胞内mRNA表达进行分析。如图2显示，QGK能够有效抑制促炎因子TNF-α、IL-6、IL-8、IL-1β、IL-12和环氧化酶(COX-2)mRNA的表达。
3.三肽QGK对NF-κB信号通路的影响
NF-KB是一种关键的转录因子，调节编码促炎介质的基因的表达。采用Western-blot检测各试验组细胞p-p65、p-IκBα蛋白水平。结果表明(如图3所示)，QGK通过阻断TNF-α诱导HT-29细胞的IκBα的磷酸化和p65的磷酸化发挥其抗炎作用。
四、体内试验结果
1.三肽QGK对DSS诱导的小鼠急性结肠炎临床症状及体重减轻的影响
如图所示4(A)，各处理组初始体重无显著性差异，经DSS诱导炎症模型之前，各组小鼠体重未见显著下降，说明三肽QGK既不影响体重，也不导致腹泻。除空白组外各组小鼠体重在第10天发生显著下降，直至第14天呈持续下降趋势。如图4(B)，与空白组相比，模型组小鼠体重下降最为显著，施用50mg/mL和150mg/mL浓度的QGK有效减缓DSS诱导的急性结肠炎小鼠的体重减轻。
众多学者指出，DSS诱导小鼠急性结肠炎模型会出现小鼠体重下降、大便粘稠、直肠出血，精神状态萎靡等症状(Zhao,Yao,Xu,Wang,Wang,&Tu,2017)。我们根据前人建立的DAI评分系统对小鼠状态进行评价。如图4(C)所示，除空白组外，各组DAI值随病程加重而升高。与模型组相比，经QGK灌胃后各组小鼠DAI值均小于模型组，临床症状相对较轻。
在DSS诱导的小鼠结肠炎模型中，小鼠结肠缩短与结肠炎的严重程度密切相关。如图4(D)所示，在本研究中，模型组的结肠长度为(4.56±0.22)cm，而空白组结肠长度为(7.58±1.04)cm。QGK(50mg/mL和150mg/mL)干预能够有效改善结肠缩短程度(P<0.05)。
2.三肽QGK对急性结肠炎小鼠结肠组织病变的影响
为继续探究三肽QGK对DSS诱导的小鼠急性结肠炎组织损伤的影响，对其结肠组织进行HE切片染色分析。与其他学者研究相似的是，对仅用DSS诱导的小鼠结肠组织进行病理组织学评估，其结肠表现为结肠组织结构重度异常，粘膜层隐窝结构几乎全部消失；大量及纤维组织增生，如图5(A)POS中黑色箭头所示；部分粘膜上皮细胞缺失，固有层裸露，如红色箭头所示；粘膜下层水肿并可见炎症细胞浸润，如黄色箭头所示。根据前人所述病理组织学评分方法对各组小鼠结肠组织进行评分，结果如图5(B)所示，与模型组相比，经QGK干预后的小鼠结肠组织组织学评分显著下降。证实了QGK对预防和干预小鼠急性结肠炎发挥有益的作用。
3.三肽QGK对DSS诱导的小鼠结肠组织MPO活性的影响
据报道，MPO含量与炎症的发展息息相关，中性粒细胞的聚集可导致大量MPO的释放(Joh&Kim,2011)。通过对MPO酶活的测定，以探究三肽QGK对DSS诱导的小鼠急性结肠炎结肠组织中中性粒细胞聚集的影响。如图6所示，与空白对照组相比，经DSS诱导后模型组MPO含量显著上升。而与模型组相比，QGK-50下降了64％，QGK-150下降了44％，因此QGK能够有效抑制DSS诱导的急性结肠炎小鼠结肠组织中MPO的分泌。
4.三肽QGK对小鼠结肠组织促炎细胞因子TNF-α、IL-6含量的影响
测定小鼠结肠中TNF-α和IL-6的含量，探究三肽QGK在小鼠体内的抗炎活性。结果以模型组作为对照，观察其他组促炎因子分泌情况。如图7所示，与空白组相比，仅以DSS诱导的小鼠结肠组织中TNF-α和IL-6表达显著上升(p<0.05)。与模型组相比，三肽QGK能够有效抑制TNF-α(p<0.05)和IL-6(p<0.05)的分泌，其中QGK-50分别下降了57.15％和58.64％，QGK-150分别下降了45.61％和35.1％。
5.三肽QGK对促炎细胞因子mRNA表达的影响
为进一步探讨QGK在体内的抗炎活性，对结肠组织中炎症细胞因子mRNA进行测定。结果以模型组做对照，观察其他组促炎因子mRNA表达情况。如图8所示，与模型组相比，三肽QGK呈剂量依赖式有效抑制促炎因子TNF-α(p<0.05)、IL-1β(p<0.05)、IL-6(p<0.05)、IL-17(p<0.05)、MCP-1(p<0.05)、IFN(p<0.05)mRNA的表达水平。
综上，三肽QGK在体内和体外均具有良好的抗炎活性。因此，三肽QGK可以用于预防或减缓炎症性肠病保健品或药品的研发。
以上所述，只是本发明的较佳实施例而已，本发明并不局限于上述实施方式，只要其以相同的手段达到本发明的技术效果，都应属于本发明的保护范围。在本发明的保护范围内其技术方案和/或实施方式可以有各种不同的修改和变化。
Claims (6)
1.QGK三肽，其特征在于，其氨基酸序列为Gln-Gly-Lys。
2.根据权利要求1所述的QGK三肽，其特征在于，其分子量为331Da。
3.根据权利要求1所述的QGK三肽，其特征在于，其通过固相合成法获得。
4.权利要求1至3任一项所述的QGK三肽在制备预防和/或缓解炎症性肠病的食品或药物中的应用。
5.一种药物组合物，其特征在于，其活性成分为权利要求1至3任一项所述的QGK三肽，用于预防和/或缓解炎症性肠病。
6.根据权利要求5所述的药物组合物，其特征在于，还包括溶剂或可药用辅助剂。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110681894.5A CN113402583B (zh) | 2021-06-19 | 2021-06-19 | Qgk三肽及其应用 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110681894.5A CN113402583B (zh) | 2021-06-19 | 2021-06-19 | Qgk三肽及其应用 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113402583A true CN113402583A (zh) | 2021-09-17 |
| CN113402583B CN113402583B (zh) | 2023-03-21 |
Family
ID=77681730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110681894.5A Active CN113402583B (zh) | 2021-06-19 | 2021-06-19 | Qgk三肽及其应用 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113402583B (zh) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007874A1 (en) * | 1990-10-24 | 1992-05-14 | British Bio-Technology Limited | Pharmaceutically active proteins comprising an active protein and an integrinaffinity sequence |
| WO2006043972A1 (en) * | 2004-10-12 | 2006-04-27 | Amprotein Corporation | Chimeric protein |
| CN105636975A (zh) * | 2013-09-23 | 2016-06-01 | 奥古斯特沃尔夫博士有限两合公司-医药 | 抗炎三肽 |
| WO2017192867A1 (en) * | 2016-05-04 | 2017-11-09 | Millennium Pharmaceuticals, Inc. | Triple combination therapy for treating inflammatory bowel disease |
| CN111233972A (zh) * | 2020-01-19 | 2020-06-05 | 华南理工大学 | 一种抗炎三肽及其提取分离方法和在改善记忆中的应用 |
| CN111620942A (zh) * | 2020-06-12 | 2020-09-04 | 中国科学院昆明动物研究所 | 布氏鼠耳蝠白三烯A4水解酶抑制剂Motistin的成熟肽及其应用 |
-
2021
- 2021-06-19 CN CN202110681894.5A patent/CN113402583B/zh active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992007874A1 (en) * | 1990-10-24 | 1992-05-14 | British Bio-Technology Limited | Pharmaceutically active proteins comprising an active protein and an integrinaffinity sequence |
| WO2006043972A1 (en) * | 2004-10-12 | 2006-04-27 | Amprotein Corporation | Chimeric protein |
| CN105636975A (zh) * | 2013-09-23 | 2016-06-01 | 奥古斯特沃尔夫博士有限两合公司-医药 | 抗炎三肽 |
| WO2017192867A1 (en) * | 2016-05-04 | 2017-11-09 | Millennium Pharmaceuticals, Inc. | Triple combination therapy for treating inflammatory bowel disease |
| CN111233972A (zh) * | 2020-01-19 | 2020-06-05 | 华南理工大学 | 一种抗炎三肽及其提取分离方法和在改善记忆中的应用 |
| CN111620942A (zh) * | 2020-06-12 | 2020-09-04 | 中国科学院昆明动物研究所 | 布氏鼠耳蝠白三烯A4水解酶抑制剂Motistin的成熟肽及其应用 |
Non-Patent Citations (3)
| Title |
|---|
| CHEN 等: "Hydrogelation of the Short Self-Assembling Peptide I3QGK Regulated by Transglutaminase and Use for Rapid Hemostasis", 《APPLIED MATERIALS & INTERFACES》 * |
| ZHAO 等: "In silico identification of novel small molecule umami peptide from ovotransferrin", 《INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY》 * |
| 汪雄 等: "食源性抗炎肽的制备、分离、鉴定及其抗炎机制研究进展", 《食品工业科技》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113402583B (zh) | 2023-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11458190B2 (en) | Mussel adhesive protein product and use thereof for treating mucosal inflammation | |
| JP6396992B2 (ja) | 消化器系疾患およびその他の疾患の処置 | |
| Rijnierse et al. | Critical role for mast cells in the pathogenesis of 2, 4-dinitrobenzene-induced murine colonic hypersensitivity reaction | |
| Duan et al. | Antiviral effects of ergosterol peroxide in a pig model of porcine deltacoronavirus (PDCoV) infection involves modulation of apoptosis and tight junction in the small intestine | |
| CN110862963B (zh) | 蜕膜nk细胞及其细胞亚群在制备不孕不育相关疾病治疗药物中的用途 | |
| US11471501B2 (en) | Pharmaceutical composition for use in the treatment of prostate pathologies | |
| Woźniacka et al. | Morbus Behçet–a rare disease in Central Europe | |
| RU2727142C2 (ru) | Бисамидное производное дикарбоновой кислоты в качестве средства, стимулирующего регенерацию тканей и восстановление сниженных функций тканей | |
| CN113402583B (zh) | Qgk三肽及其应用 | |
| JP2010517992A (ja) | 子宮内膜症の治療用の薬剤 | |
| KR101734093B1 (ko) | 알러지 유발 물질을 저감시킨 정제 봉독을 유효성분으로 함유하는 염증성 질환 예방 및 치료용 약학적 조성물 | |
| JP2017515904A (ja) | 腎線維症を抑制するためのジンセノサイドｍ１の使用 | |
| Ismail et al. | Royal jelly protects against experimentally-induced ulcerative colitis in adult male albino rats: A histological study | |
| Wu et al. | Protective effect of the abelmoschus manihot flower extract on DSS-induced ulcerative colitis in mice | |
| CN113402582B (zh) | Ank三肽及其应用 | |
| CN110801446A (zh) | 一种亚腈胺在制备治疗结肠炎药物中的应用 | |
| US20170196917A1 (en) | Agent for prevention and treatment of chlamydia infection | |
| CN102641277B (zh) | 一种治疗妇科病、皮肤病的软膏及其制备方法 | |
| CN105395584B (zh) | 片仔癀及其制剂在制备治疗多发性硬化症的药物中的应用 | |
| KR20190090271A (ko) | 알레르기비염 완화, 치료 또는 예방용 약학조성물 | |
| CN109646413B (zh) | 一种奥美钠镁片 | |
| CN115350185B (zh) | 多潘立酮在制备治疗溃疡性结肠炎药物中的应用 | |
| CN113577063B (zh) | 一种化合物在制备治疗炎性肠病的药物中的用途 | |
| Yilmaz et al. | Effects of hyperbaric oxygen therapy on hydrochloric acid-induced interstitial cystitis in rats: a histological and ultrastructural study. | |
| Xie et al. | Protective Effect of Thalidomide on 2, 4, 6-Trinitrobenzenesulfonic Acid-Induced Experimental Colitis in Rats via the Inhibition of T Helper 17 Cells |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |