247 results about "Type III collagen" patented technology

The invention provides a preparation method of a novel recombinant humanized collagen hydrogel. The method comprises the following steps: recombinant humanized collagen and a dialdehyde crosslinking agent are subjected to a reaction, the concentration of the dialdehyde crosslinking agent is 0.01-0.25%, and the recombinant humanized collagen is one or more of recombinant humanized type II collagen, recombinant humanized type III collagen and recombinant humanized type XVII collagen, and the recombinant humanized collagen has a triple helix structure. The aldehydes cross-linking agent suitable for the recombinant humanized collagen, especially the recombinant humanized collagen with a triple helix structure, and the optimal reaction conditions are determined.

A recombinant humanized collagen and a preparation method therefor. The recombinant humanized type III collagen can be efficiently and stably expressed in three expression systems of yeast, Escherichia coli, and CHO cells, and has the biological activity superior to that of a commercially available collagen product. The recombinant humanized type III collagen has structural characteristics and functional activity similar to those of a natural collagen, and thus has wide application prospects in biomedical materials, tissue engineering products, cosmetics, foods, health care products or drugs, medical instruments, medical cosmetology and the like.

The invention provides a recombinant humanized III-type collagen with a triple helix structure and preparation and application thereof, and belongs to the technical field of protein engineering, the amino acid sequence of the recombinant humanized III-type collagen comprises n core units, n is an integer of 1 or greater than 1, and the amino acid sequence of each core unit is as shown in SEQ ID NO: 1; the invention also provides a construction method of the expression system and a preparation method of the recombinant humanized III-type collagen. The invention also provides practical industrial application according to the characteristics of the protein. The recombinant humanized III-type collagen provided by the invention is high in purity, good in stability and high in biological activity, and experiments show that the recombinant humanized III-type collagen has various biological activities of promoting cell proliferation and migration and the like.

The invention relates to the technical field of biology, and particularly discloses a recombinant collagen III and application thereof in preparation of gel. The recombinant collagen III is designed by optimizing functional area sequences of human I-type and III-type collagen, the amino acid sequence is shown as SEQ ID No.2, and the recombinant collagen III has the characteristics of high stability, good hydrophilicity and low immunogenicity. The preparation method comprises the steps of expression vector construction, escherichia coli induced expression, affinity chromatography purification and renaturation. The recombinant collagen III can be prepared into a gel dressing and comprises sodium alginate, methylparaben and other components. Experiments show that the gel can effectively promote cell proliferation and has no cytotoxicity; in a mouse skin injury model, the collagen can relieve inflammation, accelerate wound healing and inhibit scar formation, and the effect of the collagen is superior to that of natural human III-type collagen. The invention provides a safe and efficient novel material for wound repair, and is suitable for medical dressings and tissue engineering.

The invention discloses humanized III-type collagen as well as a preparation method and application thereof, and belongs to the technical field of bioengineering. According to the method, firstly, on the basis of an original humanized III-type collagen gene, cell adhesion activity is taken as an evaluation index, a better cell adhesion sequence is screened out and spliced and integrated with the original collagen gene, and brand-new humanized III-type collagen is obtained. And constructing a recombinant expression vector of the humanized III type collagen containing the adhesion sequence by taking the probiotic EcN as a host cell, and introducing the recombinant expression vector into the EcN to obtain a strain of functional recombinant probiotic. Compared with a traditional escherichia coli engineering bacterium BL21 (DE3), the recombinant probiotics have good cell adhesion activity while efficiently expressing the humanized type III collagen, the bacterial endotoxin content of the recombinant humanized type III collagen obtained through purification meets the industrial standard, and the recombinant probiotics have good application prospects. The purification cost caused by industrial removal of endotoxin can be avoided, so that the production cost is reduced, and the method has a good application prospect.

The invention relates to the field of cosmetics, and discloses an anti-wrinkle composition containing recombinant collagen as well as a preparation method and application of the anti-wrinkle composition. The anti-wrinkle composition is prepared by compounding I-type collagen peptide nano-micelles, recombinant humanized III-type collagen, recombinant humanized XVII-type collagen, glycosylglycerol and ceramide. The skin care composition has the advantages that multiple synergistic effects are achieved, collagen generation is promoted, the skin moisturizing capacity is enhanced, and the skin barrier is repaired, so that the elasticity, compactness and smoothness of the skin are remarkably improved. The product disclosed by the invention has the effects of skin barrier repair, anti-aging care, collagen protection, collagen generation promotion, water locking and moisturizing and the like, and is suitable for research, development and application of skin care products for resisting wrinkles, tightening and delaying senescence.

The invention relates to the technical field of biological medicine, in particular to recombinant III-type humanized collagen as well as a preparation method and application thereof. In one embodiment, the recombinant III type humanized collagen prepared by the invention has an amino acid sequence as shown in SEQ ID NO: 1 or SEQ ID NO: 4. The recombinant III-type humanized collagen prepared by the invention has good biological activity, can promote collagen synthesis related gene expression, promote skin fibroblast proliferation, increase the content of skin collagenous fibers and elastic fibers, and improve skin elasticity and compactness; in addition, the expression of osteogenesis related genes is promoted, and the proliferation of osteoblasts is promoted. The results show that the recombinant III-type humanized collagen prepared by the invention has an extremely wide application prospect in developing related medical and cosmetic products for delaying skin aging and promoting wound repair and bone tissue healing.

The invention provides a recombinant human collagen III with high thermal stability and high transdermal property, and the recombinant collagen III comprises a collagen III part and a transdermal peptide part, has high transdermal absorption capacity, has the advantage of high thermal stability, and is suitable for preparing cosmetics, medicines and medical instruments.

The invention relates to a fibrous membrane, a keratinized gingival repair membrane containing the fibrous membrane and a preparation method of the keratinized gingival repair membrane. The fiber membrane is a recombinant collagen-polycaprolactone fiber membrane containing zinc oxide nanoparticles, and is prepared by the following steps: dissolving recombinant III-type collagen and polycaprolactone in hexafluoroisopropanol, adding the zinc oxide nanoparticles, and uniformly stirring to form a spinning solution; and then carrying out electrostatic spinning. The fiber membrane is good in strength, hydrophilicity, softness, antibacterial performance and the like, when the fiber membrane is applied to the repairing membrane, compared with an existing repairing membrane, the mechanical property, the antibacterial performance and the biological activity are remarkably improved through the bionic three-layer structural design, and a more effective solution is provided for keratogingival repairing.

The invention provides a fusion protein for promoting proliferation of hair follicle stem cells as well as a preparation method and application of the fusion protein. The fusion protein is formed by fusion expression of a plurality of collagen structural domains capable of being combined with cell integrin and / or specific structural domains from certain functional proteins screened from collagen XVII and III type collagen. Nucleic acid molecules for coding the fusion protein are subjected to codon optimization and then recombined and stably expressed in escherichia coli to obtain the fusion protein. The fusion protein has excellent performance of promoting proliferation and migration of human hair follicle stem cells and human fibroblasts, can be used for repairing skin and hair follicle tissues and improving resistance of skin and hair follicles, and is suitable for popularization and application in the fields of beauty and skin care, medical equipment, tissue engineering and the like.

The present application provides a recombinant human type III collagen with high thermal stability and high transdermal permeability. The recombinant type III collagen comprises a type III collagen part and a transdermal peptide part, which has a high transdermal absorption capacity and has the advantage of high thermal stability, and is suitable for the preparation of cosmetics, drugs and medical devices.

The present invention discloses a recombinant collagen with enhanced skin regeneration ability, a preparation method thereof and an application thereof. The present invention provides a recombinant type III collagen based on the gene sequence of human type III collagen α1 chain, and the encoding nucleic acid molecule sequence thereof is shown in SEQ NO.1. The recombinant type III collagen is expressed by high-density fermentation of Pichia pastoris GS115 strain, combined with optimized cation exchange chromatography and anion exchange chromatography purification processes, to achieve efficient preparation with a protein purity of 99.2% and a yield of 13.8 g / L; the recombinant type III collagen is highly consistent with natural collagen, and can significantly promote skin regeneration, collagen fiber deposition and wound repair.

The invention relates to a skin care composition and application thereof, and belongs to the technical field of cosmetics. The invention provides a skin care composition which comprises ginsenoside RG2 and III-type collagen, the composition can effectively inhibit secretion of metal matrix protease MMP1 and remarkably increase gene expression of the III-type collagen and has a synergistic anti-wrinkle effect, and the ginsenoside RG2 and the III-type collagen used for preparing cosmetics are high in price, so that the skin care composition has a good anti-wrinkle effect. In this way, the usage amount of ginsenoside RG2 and III type collagen can be reduced, and the ginsenoside RG2 and III type collagen can exert equivalent functions under the condition of low usage amount, so that the cost is saved, and meanwhile, a better anti-wrinkle effect can be achieved.

The present invention relates to the technical field of protein engineering and provides a recombinant humanized type III collagen having a triple helix structure, a preparation method therefor, and a use thereof. The amino acid sequence of the recombinant humanized type III collagen comprises n core units, wherein n is 1 or an integer greater than 1, and the amino acid sequence of the core unit is as shown in SEQ ID NO: 1. The present invention further provides a method for constructing an expression system and a method for preparing a recombinant humanized type III collagen. The present invention further provides an actual industrial use on the basis of the characteristics of the protein. The recombinant humanized type III collagen provided by the present invention has high purity, good stability, and high biological activity. Experiments have shown that the recombinant humanized type III collagen has various biological activities such as promoting cell proliferation and migration.

Provided are a recombinant collagen, an expression method and use thereof. In the present disclosure, the recombinant collagen is expressed by a human embryonic kidney cell Expi293F at a high protein expression level, thereby realizing the expression of a large-molecular-weight recombinant collagen. Activity studies have showed that the expressed recombinant collagen has desirable activity in promoting cell migration, while the recombinant collagen III+I with a fusion tag shows high stability at 4° C. In addition, cell activity studies have shown that the recombinant type III collagen expressed by human cells has better activity in promoting the cell migration than that of a commercially available type III collagen. These results indicate that the human cell expression system is conducive to the expression of highly active and large-molecular-weight recombinant collagen.

The invention relates to the technical field of collagen, and discloses a preparation method of recombinant engineering bacteria for expressing III-type collagen COL17A1, which comprises the following steps: synthesizing an optimized sequence of human III-type collagen, and adding proper restriction enzyme cutting sites at two ends of the sequence. According to the preparation method of the recombinant engineering bacterium for expressing the III-type collagen COL17A1, codon optimization is carried out on a target sequence by adopting a yeast expression system, OptimGeneTM codon optimization is provided according to codon preference of yeast strains such as pichia pastoris, and the yield of recombinant protein is further improved. And a proper vector is selected to realize high-efficiency expression in pichia pastoris. For example, a pGAPZ A-alpha A vector stably expresses recombinant protein in pichia pastoris by using a GAP promoter, is a constitutive gene expression vector, and can maintain a stable expression rate in cells no matter how the environment changes. An inducer does not need to be added, the production process is simplified, the production cost is reduced, and the production efficiency is improved.

The invention relates to the technical field of cosmetics, in particular to a composition, a reagent, application of the composition and the reagent, a generation accelerant of type I collagen and type III collagen and cosmetics. The composition is prepared from the following components in parts by weight: 0.001 to 0.55 part of palmitoyl tripeptide trifluoroacetate, 0.001 to 1 part of methylsilanetriol and 0.001 to 0.55 part of snake venom-like tripeptide. According to the technical scheme provided by the invention, not only can the mitochondrial function be adjusted, but also the expression of HSP47 protein can be promoted, so that the collagen generation of dermis is promoted, the length and the quantity of nasolabial folds are reduced, the skin elasticity is improved, and a good anti-aging effect is shown.

The invention discloses Dong'e donkey-hide gelatin active peptide and application thereof. Relates to the technical field of biology. The invention provides an amino acid sequence and application of the Dong'e donkey-hide gelatin active peptide. The amino acid sequence of the CCA active peptide is YYTSASGDEMVSLK, and the CCA active peptide can significantly up-regulate the I-type collagen gene expression, increase the I-type and III-type collagen content and reduce senescence markers. The peptide fragment can be combined with TGFBR2, especially TGFBR1, gene and protein expression of the TGFBR2 can be up-regulated, downstream targets of a TGF-beta-SMAD pathway can be activated, and the MMPs / TIMPs ratio can be reduced. According to the present invention, the TGF beta-SMAD pathway is activated, the MMPs / TIMPs ratio is reduced, the collagen synthesis is promoted, and the excessive decomposition of the collagen is inhibited, such that the I type collagen content and the III type collagen content are increased, and the aging degree of the photoaging dermal fibroblast is reduced;

The invention discloses an anti-infection ointment for promoting healing of burns and scalds and other wound surfaces and a preparation method thereof, the anti-infection ointment comprises active components and auxiliary materials, the active components comprise 0.2-3 parts by weight of ganoderma lucidum chitosan, 0.2-5 parts by weight of recombinant III type collagen, 0.1-2 parts by weight of zinc and 0.5-8 parts by weight of a Cur-Mg compound; the Cur-Mg compound is a compound of Cur-Mg (at) PP hydrogel, antibacterial polyphenol and boric acid ester bond hydrogel. Compared with the prior art, the ointment disclosed by the invention has the advantages of good antibacterial property, high wound healing promoting speed, reduction of scar formation and the like through a synergistic effect of multiple components, and realizes slow release of active components and good wound microenvironment regulation through a hydrogel system.

The application discloses an anti-wrinkle composition containing recombinant collagen as well as a preparation method and application thereof, and belongs to the technical field of cosmetics and skin care products. The composition contains the following active ingredients in percentage by mass: 0.01%-20% of recombinant humanized type I collagen, 0.01%-20% of recombinant humanized type III collagen, 0.01%-10% of recombinant humanized type XVII collagen, and 0.01%-20% of space-bred desert algae extract. The three kinds of recombinant humanized collagens and the space-bred desert algae extract form a complex system, and when the total mass ratio is in a specific interval of 1.3:1-4:1, the three kinds of recombinant humanized collagens and the space-bred desert algae extract can synergistically improve the skin barrier function. Based on the synergistic mechanism of the complex system, the composition disclosed by the application can effectively promote the skin moisture retention and anti-wrinkle ability, repair the skin barrier, and is suitable for the development and application of skin care products for anti-wrinkle, skin tightening and skin aging delay.

The invention belongs to the technical field of biological medicines, and particularly discloses a collagen peptide composition for enhancing immunostimulation osteoblast synthesis and a preparation method thereof, the collagen peptide composition comprises the following components by mass: 0.05-0.2% of taurine, 0.1-1% of vitamin C, 5-20% of type II collagen peptide, 5-20% of type III collagen peptide, and the balance of bovine bone collagen peptide. On the basis of the bovine bone collagen peptide, under the action of the taurine, the vitamin C, the II type collagen peptide, the III type collagen peptide and the red date extract, immunity can be effectively improved, osteoblasts are stimulated to synthesize the collagen peptide, and therefore the bone mineral density is effectively increased, and the osteoporosis is reduced. Wherein the red date extract and the bovine bone collagen peptide have a remarkable synergistic effect.

Provided is 164.88-degree recombinant humanized type III collagen for vascular repair. The present invention relates to a use of collagen in preparation of a medical device or a drug or a kit. The medical device or drug or kit is used for prevention and / or treatment of cardiovascular diseases or for vascular damage repair. The collagen comprises n repeated units, and each repeated unit comprises a sequence as shown in SEQ ID NO: 1. The collagen can be used for treating or preventing cardiovascular diseases.

The invention provides a recombinant human collagen III with high thermal stability and high transdermal property, and the recombinant collagen III comprises a collagen III part and a transdermal peptide part, has high transdermal absorption capacity, has the advantage of high thermal stability, and is suitable for preparing cosmetics, medicines and medical instruments.

The invention relates to the field of biological materials, in particular to modified recombinant III-type collagen hydrogel loaded with herba houttuyniae vesicles and application of the modified recombinant III-type collagen hydrogel loaded with the herba houttuyniae vesicles. The hydrogel is prepared from the herba houttuyniae vesicles, modified recombinant human-derived III-type collagen and polyvinyl alcohol, modified recombinant human-derived three-type collagen and polyvinyl alcohol are subjected to physical and chemical double-crosslinking to form collagen hydrogel, the collagen hydrogel is loaded with plant extracellular vesicles prepared from traditional Chinese medicine herba houttuyniae, and when the collagen hydrogel is applied to diabetic wounds, the hydrogel keeps a moist environment for the wounds; due to change of microenvironments such as active oxygen and pH in skin tissues, boric acid ester bonds in the collagen hydrogel can be promoted to be broken, so that the active oxygen is removed, and the wrapped herba houttuyniae vesicles are released into wounds.

The invention relates to application of recombinant humanized III-type collagen in preparation of an esophageal squamous cell carcinoma inhibitor. The invention discovers that the recombinant humanized III-type collagen can significantly inhibit the proliferation of esophageal squamous carcinoma cells and prevent the generation of malignant phenotypes of esophageal squamous carcinoma cells. Therefore, the invention can be used for preparing medicines for preventing and treating esophageal squamous carcinoma.

The invention discloses a freeze-dried essence with a repairing effect and a preparation method, and belongs to the field of skin care products, and the freeze-dried essence is composed of freeze-dried powder and an independent solvent liquid. The freeze-dried powder contains 0.5-3 parts of palmitoyl oligopeptide, 3-8 parts of I-type collagen, 1-5 parts of III-type collagen, 0.1-1 part of chitosan, 1-3 parts of secondary variable-temperature fermentation liquor of betula platyphylla and 2-8 parts of a freeze-drying protective agent; the solvent liquid is prepared from 0.5 to 3 parts of hyaluronic acid and 0.05 to 0.5 part of sodium polyglutamate. The preparation method comprises the following steps: a, adding fermentation liquor after dissolving; b, adding nano liposome and a protective agent; c, quickly freezing to-55 + / -2 DEG C by liquid nitrogen, and preserving heat for 2.5-3.5 hours; d, drying for 9-11 hours under the vacuum of 15-25 Pa and at the temperature of-18 + / -2 DEG C; and e, the temperature is increased to 15 + / -2 DEG C in a stepped mode, vacuum is smaller than or equal to 20 Pa, and drying is conducted for 18- Through scientific formula design, multiple effects of efficient repairing, anti-aging and relieving are achieved.

The invention provides preparation and application of an improved recombinant III-type collagen peptide. The collagen comprises an amino acid sequence as shown in SEQ ID NO.1, and a tag sequence is fused at the N terminal and / or C terminal of the amino acid sequence as shown in SEQ ID NO.1. The recombinant collagen provided by the invention only contains a small affinity tag during expression, is convenient to purify and does not need enzyme digestion, so that the process steps are greatly simplified, the process cost is reduced, the excellent characteristics of the original recombinant collagen peptide Co8 (SEQ ID NO.1) are maintained, and the recombinant collagen still has high expression quantity, high hydrophilicity and high stability.

The invention discloses a recombinant humanized type-A type-III collagen, a preparation method thereof and a recombinant bacterium, and relates to the technical field of bioengineering. According to the preparation method, peptide fragments with 100% identical sequences of III-type collagen from human are integrated into host bacteria to obtain recombinant bacteria for efficiently synthesizing recombinant humanized A-type III-type collagen, and the recombinant humanized collagen produced by utilizing the recombinant bacteria does not contain any gene sequence of non-human collagen sources, and has the advantages of high efficiency, high yield, high yield and the like. The collagen has the characteristics of small molecular weight, high yield, high purity, water solubility and the like, and can be widely applied to the fields of skin care products, medical cosmetology, skin repair dressings and the like, so that the recombinant humanized A type III collagen, the preparation method thereof and the recombinant bacteria provided by the invention have better industrial application prospects.

The invention provides a medical-grade recombinant three-type collagen and application thereof. The recombinant humanized three-type collagen has certain cell proliferation promoting capacity and is free of cytotoxicity. The medical-grade recombinant three-type collagen provided by the invention not only has the capability of promoting cell proliferation, is free of cytotoxicity and high in cell adhesion activity, but also has a three-helix structure characterized by the collagen and is extremely high in stability, the purity can reach about 85% after the collagen is induced for 120H in a 100L fermentation tank, the difficulty of a downstream purification process is greatly reduced, and the production cost is reduced. The effect in the aspect of cell activity is obvious.