84 results about "Tetrapeptide" patented technology

The invention belongs to the field of skin care products, and particularly relates to an anti-wrinkle and anti-aging composition as well as a preparation method and application thereof, and the anti-wrinkle and anti-aging composition comprises neurotransmitter inhibition peptide, signal peptide, madecassoside, inositol and glycosylglycerol. The neurotransmitter inhibition type peptide is at least three of acetyl hexapeptide-8, arginine / lysine polypeptide, dipeptide diaminobutyrylbenzylamide diacetate and acetyl octapeptide-3, and the signal type peptide is at least two of palmitoyl pentapeptide-4, decapeptide-4 and acetyl tetrapeptide-9. Compared with the prior art, all the components of the anti-wrinkle and anti-aging composition act on different anti-aging pathways and can be matched with one another from multiple aspects of oxidation resistance, inflammation resistance, moisturizing, cell viability enhancement, wrinkle reduction and the like, a more comprehensive and better anti-aging effect is provided, skin aging is comprehensively resisted, the skin is in a more young state, and the anti-wrinkle and anti-aging composition has the advantages that the anti-wrinkle and anti-aging effects are achieved. And the anti-wrinkle and anti-aging composition is small in irritation and good in stability.

Provided are an antibacterial peptide and the use thereof. The antibacterial peptide has a structure represented by formula (I), wherein Z1 is selected from tetrapeptides, the tetrapeptides being optionally modified by -OH, -CHO, -COOH, -NH2, -SO3H or -C=O; S1 and S2 are each independently selected from amino acids having the structure of (I); Q1 and Q2 are each independently selected from dipeptides or tripeptides; and n is independently selected from any integer between 1 and 6. (Q2)4-(S2-Q1)2-S1-Z1

The invention provides a hair care composition with oil control, hair loss prevention and repair effects and a preparation method of the hair care composition, and belongs to the technical field of hair care. The hair care composition comprises functional peptides such as myristoyl pentapeptide-4, palmitoyl tripeptide-1, acetyl tetrapeptide-3, hexapeptide-3, acetyl hexapeptide-8, palmitoyl tetrapeptide-7 and the like which are synergistically combined according to a specific proportion, and glycerin, water and a penetration enhancer are supplemented to form a basic system. By optimizing peptide structure modification, adding proportion and the steps of pH control, ultrasonic treatment and collaborative assembly in the preparation process, multi-path collaborative regulation and control of hair follicle activation, scalp inflammation inhibition and keratin synthesis enhancement are realized.

The invention relates to the technical field of polypeptide biosynthesis, in particular to a method for biosynthesizing acetyl tetrapeptide-5, a composition containing the acetyl tetrapeptide-5 and application of the composition. According to the method, low-cost natural amino acid is used as a substrate, specific aminopeptidase or a mutant thereof is used as a biocatalyst, amino acid ligase and polyphosphatase are combined, and acetyl tetrapeptide-5 can be efficiently synthesized through a one-step enzymatic reaction. Compared with a traditional chemical synthesis method, the method has the advantages of low raw material cost, no use of an organic solvent, mild reaction conditions, high regioselectivity, environmental friendliness, low production cost and the like. The invention also provides a composition containing acetyl tetrapeptide-5 and dipeptide-15, the inhibition effect of the composition on grease secretion is obviously better than that of a single component, and the composition has a synergistic oil control effect under a specific ratio.

Compositions comprising specific tetrapeptides, for use in methods for treating, preventing, minimizing, diminishing or reversing various signs of aging of the skin are provided. The compositions are useful in improving the firmness or elasticity of skin, smoothing of fine-lines or wrinkles, reducing skin pores and hyperpigmentation, and increasing skin thickness, radiance and / or softness.

This invention belongs to the fields of biomedicine, beauty, and personal care health technology, and discloses a dual-target oil-controlling peptide co-amorphous assembly, its preparation method, and its application. The method involves adding capryloylglycine and acetyl tetrapeptide-5 to an alcohol solution, heating to dissolve, rotary evaporating, and drying to obtain a co-amorphous compound. This compound is then mixed with a cyclodextrin compound and water, rotary evaporating, and drying to obtain the dual-target oil-controlling peptide co-amorphous assembly. This invention employs a co-amorphous combination with cyclodextrin inclusion to assemble acetyl tetrapeptide-5 and capryloylglycine, solving the problem of their large solubility differences and difficulty in coexistence, and significantly improving the solubility of capryloylglycine. This assembly enables simultaneous transdermal delivery of the two active components through nano-assembly, helping to enhance the stability of acetyl tetrapeptide-5 and reduce its oxidative degradation. The two components synergistically control oil through a dual pathway of inhibiting 5α-reductase and targeting the MC5R receptor, respectively, exhibiting superior bioavailability and efficacy compared to a single component.

The application discloses a tetrapeptide IR4 with uric acid reducing activity, and a preparation method and application thereof, and belongs to the technical field of small molecular peptides. The amino acid sequence of the tetrapeptide IR4 is IDWR, and the tetrapeptide IR4 can be prepared by a solid-phase synthesis method and an enzymatic hydrolysis method. The tetrapeptide IR4 is identified from a porphyra haitanensis protease hydrolysate, has potential interaction with xanthine oxidase, and can reduce the uric acid content of zebrafish by 33.6% (to 5.93+ / -0.47 mu mol / g protein) at a concentration of 100 mu g / mL. Compared with an anserine (which can reduce the uric acid content of zebrafish by 25.7%), the tetrapeptide IR4 has better uric acid reducing activity. Compared with allopurinol (which can reduce the uric acid content of zebrafish to 4.61+ / -1.11 mu mol / g protein), the uric acid reducing ability of the tetrapeptide IR4 and the allopurinol has no significant difference. The tetrapeptide IR4 can be used for preparing uric acid reducing drugs and relieving hyperuricemia.

Pharmaceutical compositions containing specific tetrapeptides for use in treating, preventing, minimizing, diminishing or reversing degenerative, age-related, or trauma-induced diseases or disorders in a subject in need thereof. The disease may be a disease associated with ROS-related oxidative stress. The tetrapeptides may have an amino acid sequence of pGlu-Asn-Trp-Lys(Octanoyl)-OH as set forth in SEQ ID NO: 1 or pGlu-Asn-Trp-Thr-OH as set forth in SEQ ID NO: 2, preferably as a sodium salt thereof.

The invention relates to a tetrapeptide of formula N-Palmitoyl-Lys-Thr-Phe-Lys, for use in the prevention and / or treatment of human atopic dermatitis (AD), as well as to a composition comprising at least said tetrapeptide and at least one physiologically acceptable excipient, for use in the prevention and / or treatment of human atopic dermatitis (AD).

The invention relates to the technical field of cosmetics, in particular to a compound active peptide with functions of resisting aging and whitening skin and application of the compound active peptide. Comprising acetyl hexapeptide-1, nonapeptide-1, acetyl tetrapeptide-11, hexapeptide-9 and palmitoyl hexapeptide-12. The compound peptide disclosed by the invention can play a synergistic anti-aging and whitening role on an epidermal layer and a corium layer, and has multiple advantages; the compound peptide acts on epidermal layer keratinocytes, dermal layer fibroblasts and B16F10 cells, and can be used for detecting the senescence of the cells by influencing the expression quantity of cell senescence marker genes, influencing the cell cycle, influencing the expression quantity of extracellular matrix related proteins, influencing melanin synthesis and influencing the secretion quantity of acetylcholine in the cells. Multiple skin anti-aging and whitening effects synergistically exerted on the epidermal layer and the corium layer are achieved.

This invention belongs to the field of cosmetic technology and discloses a composition containing polypeptides, its preparation method, and its application. The composition provided by this invention comprises: polypeptides and a solubilizing and penetration-enhancing complex; the polypeptides include at least one selected from Codonopsis pilosula cyclic peptide B, conopeptide, carnosine, acetyl tetrapeptide-5, acetyl hexapeptide-8, and nonapeptide-1; the solubilizing and penetration-enhancing complex comprises the fermentation product filtrate of Kluyveromyces lactis / Ganoderma lucidum fruiting body extract, polyols, polysorbate, and ferulic acid. The composition provided by this invention, through the synergistic effect between its components, can effectively improve the solubility and stability of the polypeptides, preventing precipitation or exudation, while effectively promoting the transdermal absorption of the polypeptides; the composition provided by this invention has excellent antioxidant and anti-aging effects.

The present invention relates to tetrapeptide-containing conjugates, a preparation method therefor, and an intermediate compound and use thereof.

This invention relates to the field of peptide technology, and more particularly to a cyclic tetrapeptide compound, its preparation method, and its applications. The peptide compound has the structure shown in Formula I, or its stereoisomer or salt thereof: c(AA1-AA2-AA3-AA4), Formula I. The cyclic tetrapeptide compound can simultaneously inhibit the release of the inflammatory factor IL-6 and effectively scavenge reactive oxygen species DPPH, ABTS, and PTIO. It can effectively inhibit the production of reactive oxygen species, alleviate skin inflammation, and improve skin condition, showing great promise in the fields of anti-inflammatory and antioxidant applications.

The invention relates to an anti-saccharification composition applicable to sensitive skin and application, and belongs to the technical field of cosmetics. The anti-saccharification composition suitable for sensitive skin is prepared from the following components in parts by mass: 0.01 to 0.5 part of ascorbic acid polypeptide, 0.5 to 2 parts of ginseng root extract, 0.1 to 2 parts of acetyl tetrapeptide-2 and 0.1 to 5 parts of herba andrographitis leaf extract. The anti-saccharification composition suitable for the sensitive skin, provided by the invention, has a remarkable anti-saccharification effect, can remarkably improve skin elasticity, has a certain repairing effect and is suitable for the sensitive skin.

The invention discloses a bispecific antibody coupling drug targeting CD24 and HER2 and a preparation method and application thereof.The bispecific antibody coupling drug comprises an anti-CD24 heavy chain, an anti-CD24 light chain, an anti-HER2 heavy chain, an anti-HER2 light chain, a tetrapeptide linker and a topoisomerase I inhibitor exatan derivative, the DAR value of the bispecific antibody coupling drug is 9.25, and the anti-CD24 heavy chain, the anti-HER2 light chain, the tetrapeptide linker and the topoisomerase I inhibitor exatan derivative are different. The compound has strong cytotoxicity and internalization ability on breast cancer cells, not only can specifically target tumor tissues, but also can release drugs to kill target cells and adjacent tumor cells, and can significantly inhibit growth of breast cancer tumors. An antibody part DACH023 in the bispecific antibody coupling medicine is the same as a traditional IgG molecule, a traditional monoclonal antibody structure is reserved to the maximum extent, due to the existence of an Fc fragment, a common Protein A column affinity chromatography method can be adopted for purification, and large-scale production and purification are facilitated.

The application belongs to the technical field of pharmaceutical chemistry, and particularly relates to a PSD-95 PDZ2 peptidomimetic inhibitor and application thereof. A series of compounds are designed and synthesized by taking a tetrapeptide ETAV as a template, a structure-activity relationship of the compounds with PSD-95 PDZ2 is systematically studied, and an optimal compound 32-2, i.e., the PSD-95 PDZ2 peptidomimetic inhibitor, is screened, a structural formula of which is shown as formula (I), the PSD-95 PDZ2 peptidomimetic inhibitor has very excellent plasma stability, and exhibits significant neuroprotective activity in in-vivo and in-vitro biological activity evaluation, significantly reduces cerebral infarction caused by cerebral ischemia-reperfusion injury, and can be used for preparing a drug for treating ischemic stroke. (I).

The present application relates to the field of cosmetics, in particular to an endogenous antioxidant anti-wrinkle composition, a preparation method and application thereof, the composition comprises acetyl tetrapeptide-5, CycloRetin, collagen type 21, acetyl hexapeptide-8 and vitisins, the composition can promote the synthesis of collagen in the extracellular matrix of the dermis of the skin, and can improve the tightening and anti-wrinkle effect, human test proves that the tightening and anti-wrinkle effect of the composition is the best.

The present application relates to the technical field of freeze-dried powder, and in particular to a freeze-dried powder composition for hair regeneration and a preparation method thereof. The freeze-dried powder composition comprises 5-15 parts of vascular endothelial growth factor, 3-10 parts of platelet-derived growth factor, 1-5 parts of copper peptide, 0.5-3 parts of acetyl tetrapeptide-3, 2-8 parts of baicalein, 1-5 parts of asiaticoside, 20-40 parts of freeze-drying protectant, and 1-3 parts of nano-silicon dioxide. The preparation method comprises mixing the pretreated vascular endothelial growth factor, platelet-derived growth factor, copper peptide, acetyl tetrapeptide-3, baicalein, and asiaticoside with the freeze-drying protectant and nano-silicon dioxide, and then freeze-drying. The freeze-dried powder composition can promote the growth of hair, improve the microenvironment of the scalp, and provide long-lasting support for the healthy growth of hair. The preparation method improves the stability and biological activity of the active ingredients, and enhances the overall performance and safety of the product.

This application relates to the biomedical field, specifically to a method for expressing tandem recombinant proteins using *E. coli*. The tandem recombinant protein has the general formula leader peptide-(cleavage site 1-spacer peptide-cleavage site 2-target protein)n, wherein the leader peptide is selected from any sequence of SEQ ID NO:1-4; cleavage sites 1 and 2 may be the same or different, and are double cleavage sites of Kex2 and CPB enzymes selected from dipeptides KR or RR; the spacer peptide is any sequence selected from tripeptide EDG, tetrapeptide SEQ ID NO:5-7, or heptapeptide SEQ ID NO:8; the target protein is GLP-1 or an analogue thereof; and n is a tandem repeat number of 2-10. The inclusion bodies obtained by this method do not require denaturation, and the target polypeptide is obtained through double enzyme digestion. The expression level of the fusion protein can reach 32 g / L, and the yield of the target polypeptide can reach 25.3 mg / g wet cells or 10 g / L fermentation broth.

The invention discloses a compound composition of acetyl tetrapeptide-3 and biotin tripeptide-1 as well as a preparation method and application of the compound composition, and mainly solves the technical problems that an existing hair care product is single in action target spot, poor in synergism, insufficient in safety and lack of clinical data support. The optimal weight ratio of the core active components acetyl tetrapeptide-3 to biotin tripeptide-1 is determined to be (2-4): 1, and acetyl tetrapeptide-3 and biotin tripeptide-1 can respectively act on hair follicle activation and alopecia blocking key pathways and synergistically promote collagen synthesis to strengthen hair anchoring and form a multi-target synergistic effect. The compound composition is also added with auxiliary components such as a humectant, a stabilizer, a penetration enhancer, a pH regulator and the like, the technical pain of the existing product is solved, and a new scheme is provided for the development of efficient and safe hair care products.

The application discloses a derivative of tetrapeptide-7 and application thereof. The derivative of tetrapeptide-7 or a pharmaceutically acceptable salt thereof has the following structure: the substituent R is selected from the group consisting of. The derivative of tetrapeptide-7 has excellent effects of anti-inflammation, promoting synthesis of collagen and / or elastin, reducing wrinkle area or wrinkle degree, and has a smaller effective concentration compared with tetrapeptide-7, and can be applied to medicines, cosmetics or skin care products as a main active ingredient.

The application prepares L-selenomethionine, and applies the L-selenomethionine to synthesis of tripeptide and tetrapeptide, and prepares new selenium-containing polypeptide compounds; the selenium-containing polypeptide compounds have antibacterial activity, and have good inhibition effect on gram-positive bacteria; the results obtained by the application show that the selenium-containing polypeptide compounds have wide application prospect in a drug development system, and provide a new and wider idea for synthesis and screening of selenium-containing polypeptide drug.

This invention provides a multi-layered composite hair growth delivery system, its preparation method, and its application, comprising: a biotin-bonded cyclodextrin three-dimensional network polymer backbone, Bacillus-derived natural extracellular vesicles embedded within the pores of the biotin-bonded cyclodextrin three-dimensional network polymer backbone, saw palmetto fruit extract embedded in the phospholipid bilayer of the Bacillus-derived natural extracellular vesicles, and myristoyl tetrapeptide-12 encapsulated within the Bacillus-derived natural extracellular vesicles. The biotin-bonded cyclodextrin three-dimensional network polymer backbone serves as the outer support carrier, and the Bacillus-derived natural extracellular vesicles serve as the inner active ingredient encapsulation carrier, co-loading the lipid-soluble saw palmetto fruit extract and the hydrophilic myristoyl tetrapeptide-12 to achieve time-controlled release, multi-layered transdermal delivery, and synergistic effects.

The invention discloses a method for identifying a protein cross-linking mass spectrum peptide fragment pair. Comprising the steps of firstly constructing a peptide fragment vector database, then obtaining and preprocessing spectrogram data, then generating a spectrogram representation sequence, then generating a spectrogram embedding vector, then retrieving candidate peptide fragments in the vector database, and finally determining a target crosslinking peptide fragment and a crosslinking site according to a retrieval result. According to the method, the beneficial effects of remarkably improving the polypeptide segment crosslinking recognition precision and greatly reducing the candidate search space are achieved, and the method is not only suitable for traditional dipeptide crosslinking, but also capable of treating complex crosslinking forms such as tripeptide and tetrapeptide, and has high universality. Meanwhile, a retrieval framework of the vector database supports rapid updating and expansion, and the method is suitable for cross-linked mass spectrum data analysis under different species and different experiment conditions.

The application discloses a kind of hair follicle cell hair growth technology formula, comprising: cypress leaf extract, ginseng root extract, radix polygoni multiflori extract, ginger root extract, acetyl tetrapeptide-3, biotin tripeptide-1, lactobacillus fermentation lysate product and pharmaceutically or cosmetically acceptable carrier;Wherein, with weight parts, the total weight parts of cypress leaf extract, ginseng root extract and radix polygoni multiflori extract is 10-30 parts, and the weight ratio of acetyl tetrapeptide-3 and biotin tripeptide-1 is 0.5-5:1.The application forms a multi-dimensional synergistic activation system by combining specific peptides that stimulate hair follicle signals and improve the microenvironment with fermentation products that regulate the microecosystem in a specific ratio, achieving efficient and stereoscopic synergistic activation of hair follicle cell proliferation.

The application provides a natural tetrapeptide-based MOF material and a preparation method thereof. The natural tetrapeptide-based MOF material is assembled by a tetrapeptide, amino-glycine-histidine-glycine-glycine-carboxyl (GHGG) as a ligand and a divalent copper ion, and is abbreviated as Cu-GHGG, wherein the molar ratio of the ligand to the divalent copper ion is 1:1. The Cu-GHGG prepared by the application is a layered crystal, and the crystallization solvent is filled between layers during crystallization. After the crystallization solvent is removed by heating, the material still maintains crystallinity. The material after removal of the solvent can adsorb water molecules in the air by itself when placed in humid air.

The present application provides a Morchella source hypoglycemic peptide and application thereof, and belongs to the technical field of biological medicine. The present application provides a Morchella source hypoglycemic peptide, which comprises a tripeptide and / or a tetrapeptide; the amino acid sequence of the tripeptide is PTW, and the amino acid sequence of the tetrapeptide is MPTW. The Morchella source hypoglycemic peptide of the present application has a molecular weight less than 1000, strong hydrophobicity, and contains Pro and Trp. Molecular docking results show that PTW and / or MPTW can be combined with the proteinase diabetes prevention and treatment target dipeptidyl peptidase IV, protein tyrosine phosphatase 1B and alpha-amylase to play a hypoglycemic role through hydrogen bonding and hydrophobic interaction. Moreover, the hypoglycemic peptide of the present application is a natural product, has no hemolyticity and allergenicity, and has good pharmacokinetic characteristics. The present application has certain guiding significance for the development of food source hypoglycemic peptides.