619 results about "Secretion" patented technology

The present application relates to the technical field of oat bran deep processing, and particularly relates to an oat active polypeptide with GLP-1 secretion promotion, blood sugar reduction and lipid reduction activity, and a preparation method and application thereof.The present application is prepared by adding alkaline protease and ficin for double-enzyme step-by-step hydrolysis after homogenate, enzymolysis and alkali extraction and acid precipitation pretreatment, and then filtering, ultrafiltration desalination and drying, so that the oat active polypeptide with GLP-1 secretion promotion, blood sugar reduction and lipid reduction activity is obtained.The present application is simple to operate, low in equipment requirement, and suitable for industrial large-scale production.The prepared oat active polypeptide has GLP-1 secretion promotion, blood sugar reduction and lipid reduction activity, has a significant inhibitory effect on pancreatic lipase and alpha-glucosidase, has an obvious GLP-1 secretion promotion effect, and has a significant blood sugar reduction and lipid reduction effect.

The invention discloses a fish by-product active peptide, a preparation and application, and belongs to the technical field of biological active peptides. The amino acid sequences of the fish by-product active peptide are shown as SEQ ID NO: 1 to SEQ ID NO: 3. Both the single peptide fragment and the compound peptide fragment of the fish by-product active peptide can obviously inhibit NO secretion of a lipopolysaccharide (LPS)-induced macrophage (RAW264.7) inflammation model, so that the fish by-product active peptide has a relatively good application prospect in preparation of a product with an anti-inflammatory effect; and a foundation is laid for high-added-value utilization of salmon byproducts and promotion of research, development and application of functional active peptides.

The invention relates to the technical field of microorganisms, and discloses a lactobacillus delbrueckii subsp. Bulgaricus XJFY201503 and an application thereof in improving an immune function, the lactobacillus delbrueckii subsp. Bulgaricus XJFY201503 is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number is CGMCC NO.30047, and the preservation time is March 18, 2024. The lactobacillus delbrueckii subsp. Bulgaricus XJFY201503 can be used for directly improving the immune function of an immunosuppressive mouse by protecting and maintaining normal physiological structures of central and peripheral immune organs and promoting secretion of serum cytokines and immune globulins; and the immune function of the mouse can be indirectly promoted by relieving intestinal inflammation reaction.

The invention belongs to the field of biotechnology and environmental governance, and particularly relates to a manganese peroxidase mutant based on high-throughput screening modification and application of the manganese peroxidase mutant to straw degradation. Aiming at the problems of low natural secretion amount, insufficient specific activity, complex preparation process and the like of the existing manganese peroxidase, the method comprises the following steps: firstly, constructing engineering bacteria based on an escherichia coli exocrine system, constructing a mutant library through error-prone PCR in combination with a directed evolution technology, and performing high-throughput screening by utilizing an ABTS colorimetric method; the recombinant manganese peroxidase mutant with high catalytic activity is obtained, and the enzyme activity is improved by 1.29 times compared with that of a wild type. Furthermore, recombinant engineering bacteria are constructed on the basis of a bacillus subtilis exocrine system, and efficient secretion of the mutant enzyme is achieved. The mutant enzyme preparation is used for wheat straw degradation, and the lignin degradation rate reaches 41.37% (improved by 30.09% compared with that of a wild type). The method is simple and convenient in process, low in cost and remarkable in effect, and has a wide industrial application prospect.

The invention discloses an application of lactobacillus mucosa LMSJ001 or a metabolite agmatine of the lactobacillus mucosa LMSJ001 in preparation of a medicine for improving intestinal aging, and the application research of the lactobacillus mucosa LMSJ001 in a constructed aging mouse model finds that the lactobacillus mucosa LMSJ001 can be used for preparing a medicine for improving intestinal aging. Therapeutic gavage and application of Lactobacillus mucosa LMSJ001 in colon organs for intervention can significantly improve aging indexes, alleviate histological aging performance, promote intestinal peristalsis of aged mice, reduce secretion of inflammatory factors of the aged mice, improve intestinal epithelial barrier functions of the aged mice and improve intestinal dryness of the aged mice. The lactobacillus mucosa LMSJ001 can generate a metabolite agmatine through arginine decarboxylase, and agmatine can improve related indexes of proliferation and differentiation of intestinal stem cells and reduce expression of related indexes of senescence. Based on the unique functions, the lactobacillus mucosa LMSJ001 or the metabolite agmatine of the lactobacillus mucosa LMSJ001 can be cooperated or complemented with other means, is used for preparing pharmaceutical compositions or detection kits and the like, and has very wide application prospects.

The invention provides a preparation method of a Witzia ciliaris IOB502 microbial inoculum and an application of the Witzia ciliaris IOB502 microbial inoculum in the aspect of recovering intestinal motility, the Witzia ciliaris IOB502 microbial inoculum is prepared by adopting a method of carrying out low-oxygen stress staged fermentation on chickpeas by adopting the Witzia ciliaris IOB502, and the generation of vitamins B1 and B2 can be promoted. The microbial inoculum does not affect physiological development of important organs such as liver, spleen and small intestine of mice, can improve defecation symptoms of the mice with constipation, increase defecation times and water content of excrement, improve intestinal movement of the mice with constipation, promote smooth passage of intestinal contents, effectively improve colon injury of the mice with constipation, and improve the constipation rate of the mice with constipation. Comprising mucous membrane layer thinning and mucus secretion reduction.

The utility model discloses a stent which is applied to an airway or an esophagus and comprises a framework and a lining film, and the framework is a tubular object which is hollow inside and provided with a mesh structure on the surface; the lining film is attached to the inner surface of the framework, a plurality of protrusions are formed on the outer wall of the lining film, the protrusions penetrate through meshes of the framework to be exposed on the outer side of the framework and are attached to the inner wall of the airway or the esophagus, and a gap is formed between the outer surface of the framework and the inner wall of the airway or the esophagus. The stent provided by the utility model not only solves the defects caused by a mesh structure of a metal bare stent, but also solves the problems that the stent is easy to displace due to low adhesive force between a membrane structure and an airway / esophagus wall, and retention is easy to cause due to the fact that the membrane obstructs the flow of secretions.

The invention discloses a giant salamander immune regulation meat peptide and application thereof. The meat peptide comprises one or more than two polypeptides selected from SEQ ID NOs: 1-5. The polypeptide can enhance cellular immune response, such as enhancing macrophage proliferation activity, improving macrophage nitric oxide secretion level, enhancing macrophage phagocytic ability, enhancing macrophage antigen presentation ability, enhancing immune organ functions, regulating T cell subpopulation, improving cellular immune factor level and enhancing immune globulin level.

The invention discloses a combined evaluation method for in-vitro and in-vivo red fading and relieving effects of cosmetic raw materials, which comprises the following steps: in-vitro model evaluation: inducing a human immortalized umbilical vein endothelial cell model by adopting TNF-alpha, and detecting the secretion amount of a prostacyclin I2 factor to obtain a score of an in-vitro model; in-vivo model evaluation: adopting a chick embryo chorioallantoic membrane model, and obtaining a score of the in-vivo model according to the degree of vasoconstriction caused by the to-be-detected raw material sample acting on the chick embryo chorioallantoic membrane; and comprehensive evaluation: based on the score of the in-vitro model and the score of the in-vivo model, comprehensively evaluating the red fading and relieving efficacy of the raw material sample to be tested. According to the technical scheme, the defect that in the prior art, no cosmetic raw material soothing efficacy evaluation method for the vascular reactivity increasing mechanism exists is overcome, efficacy evaluation is more accurate, the method has the advantages of being comprehensive, short in test period, easy to operate, economical and convenient, and an effective reference basis is provided for screening and compounding schemes of red fading and soothing raw materials.

The invention provides a purification method of mesenchymal stem cell exosomes, prepared mesenchymal stem cell exosome particles and application of the mesenchymal stem cell exosome particles, and belongs to the technical field of exosomes. The preparation method comprises the following steps: performing multiplication culture on adipose-derived stem cells to stimulate exosome secretion, then performing gradient centrifugation, collecting supernate, adding a protective agent, uniformly stirring and mixing, adding a polymer, stirring and incubating, centrifuging, collecting exosome particles, washing, and freeze-drying to obtain the mesenchymal stem cell exosome particles. The mesenchymal stem cell exosome particle prepared by the invention is simple in preparation method, relatively low in cost, easy to realize industrial application and high in yield, meanwhile, the mesenchymal stem cell exosome particle has a very good protection effect on exosomes, the preservation period of the exosomes is prolonged, and the prepared mesenchymal stem cell exosome particle has the characteristic of releasing the exosomes in a sustained and controlled release manner and has a good application prospect. The traditional Chinese medicine composition is widely applied to preparation of anti-inflammatory, anti-oxidation and skin repair promoting medicines.

The application provides a preparation method and application of oat active peptides for promoting GLP-1 secretion, wherein the oat active peptides contain any one or more of peptide segments NDQRGEII, KQGDVIALPA, PFVQQQQ and PSEQYQPYPEQQEPFVQ. The preparation method of the oat active peptides comprises enzymolysis, chemical synthesis or genetic engineering. The oat active peptides can significantly promote the secretion of GLP-1 by intestinal endocrine cells, and have the advantages of safe and non-toxic side effects, tolerance to gastrointestinal digestive enzyme hydrolysis and easy absorption. The application has simple operation, low requirement for equipment, is suitable for industrial large-scale production, and can be used for the development of new drugs for controlling blood sugar or food for assisting in controlling blood sugar, drugs for controlling body weight or food for assisting in controlling body weight and the like.

The invention discloses a mechanical response type engineered mesenchymal stem cell exosome preparation for treating diseases caused by fibrosis inflammation, a preparation method and application, and the exosome preparation is an exosome which is secreted by mesenchymal stem cells and has high cholesterol and high-efficacy protein. The exosome is prepared by culturing mesenchymal stem cells on a hydrogel matrix in a modulus hardness range of 1-50KPa, the exosome secretion amount of a single cell is (3-5) * 10 < 4 > / cell, the cholesterol content is (1-10) nM / 5mg exosome, and the size of the exosome is 110-140nm; the high-efficacy protein is a key functional protein for regulating and controlling the biological activity of the exosome and the cell action efficiency. The cholesterol content in the exosome is precisely regulated and controlled, the cytoplasm delivery efficiency and tissue penetrability of the exosome are improved, a whole-process control system of hydrogel preparation, stem cell culture and exosome purification is constructed, and the stability of the preparation and the yield of the exosome are improved.

The invention belongs to the field of biological medicines, and discloses an application of a stem cell extract in preparation of a medicine for treating or preventing arthritis by regulating lysosome and / or mitochondrial function, a preparation method of the stem cell extract comprises the following steps: S1) culturing mesenchymal stem cells and producing stress conditions to stimulate the mesenchymal stem cells; s2) separating and purifying the culture supernatant of the mesenchymal stem cells cultured in the step S1) to obtain a stem cell extract; wherein S21) the culture supernatant is filtered to obtain a filtrate; the preparation method comprises the following steps of (S1) extracting a culture supernatant containing stress stem cell secretions through stress culture of stem cells, (S2) carrying out 3KD ultrafiltration concentration on the filtrate to obtain a crude sample, (S23) purifying the crude sample through molecular sieve exclusion chromatography or reversed-phase chromatography to obtain a purified sample, and (S24) taking the purified sample to form the preparation.

The invention provides a culture medium and a method for promoting mesenchymal stem cells to secrete exosomes, and belongs to the technical field of cell biology. The culture medium provided by the invention comprises a basic culture medium and the trichostatin A with the final concentration of 10-100nM. The TSA in the culture medium can significantly enhance MSCs exosome secretion under low-concentration and short-time stimulation, does not damage cell activity, does not affect basic biological characteristics and functions of the exosome, significantly increases the MSCs exosome secretion amount by more than 2 times, greatly improves the production efficiency, and provides a new strategy for large-scale production of the exosome.

The application provides a copper peptide efficient soothing composition and application thereof, which comprises copper peptide and symbiotic fermentation products of thermus thermophilus and bacillus, can target stimulation of secretion of inflammatory mediators, effectively inhibits secretion of PGE2 and expression of inflammatory factors IL-6, TNF alpha and NO, and has a synergistic effect, especially on secretion of PGE2 and expression of NO, and shows a more significant soothing effect. The composition is used as an efficacy component to prepare skin care products, is particularly suitable for people with sensitive skin, can help the skin to restore a healthy state, and has a good application prospect.

Provided are a postbiotic of Weizmannia coagulans, and a preparation method therefor, and a use thereof. The postbiotic comprises inactivated bacteria and / or lipoteichoic acid. The postbiotic can enhance the phagocytosis activity of macrophages, the cytokine and NO secretion ability of macrophages, and the expression levels of immune-function-related genes and proteins, and has an effect of inducing human PBMC cells to kill cancer cells.

The invention relates to the field of cell biology, and particularly relates to a preparation method of a pancreatic cancer-related antigen-loaded polypeptide, which is characterized in that factors such as GM-CSF, IL-4, IFN-gamma, TNF-alpha, IL-1beta, IL-6, PGE2, Poly I: C, R848 and the like are added to promote mononuclear cells to be activated into DC cells, pancreatic cancer PANC-1, MIA PaCa-2, BxPC-3, KP4 and SW1990HM antigens are loaded, and not only is DC cell maturation promoted, but also pancreatic cancer-related antigens are loaded. The positive rate of CD83 + CD86 of the DC cells cultured by the method is 94.16%, and the secretion amount of IL-12p70 in a cell supernatant is (645.38 + / -36.49) pg / mL. By adopting the culture method disclosed by the invention, the maturation rate of the DC cells can be improved while the DC cells are activated, so that the culture method for promoting the maturation and amplification of the DC cells loaded with the pancreatic cancer antigen is achieved.

The invention relates to the technical field of plant conditioners, in particular to application of nano silicon dioxide in relieving stress of polystyrene microplastics on hibiscus mutabilis. The invention finds that the influence of polystyrene micro-plastic on the stress of hibiscus mutabilis can be relieved to a certain extent during treatment by nano-silica, the intervention of the nano-silica causes the increase of secretion of melatonin, and the combined action of the nano-silica and melatonin makes the effect more remarkable and shows a synergistic effect. The nano silicon dioxide directly acts on the surfaces of cells to form a protective layer, so that adsorption and damage of PS-MPs to the cells are reduced, synthesis of melatonin is promoted, and a melatonin signal channel is activated. The activated melatonin signaling pathway further regulates the activity of carbon and nitrogen metabolism key enzymes, promotes carbon and nitrogen metabolism, improves synthesis and accumulation of carbohydrates and proteins, enhances the activity of an antioxidant system, removes active oxygen and reduces oxidative damage.

The invention relates to the technical field of animal husbandry, in particular to a synchronous oestrus-timing insemination method suitable for cattle, which comprises the following steps: firstly, performing intramuscular injection of PG (cloprostenol sodium) at different time points after calving to promote uterine recovery and luteolysis and lay a synchronous oestrus foundation; the method comprises the key steps that GnRH (gonadotropin release hormone) is given through intramuscular injection on the 43rd day, the 53rd day, the 60th day and the 69th day, pituitary is promoted to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH), collection and screening of follicles are guided, follicle maturation is promoted, the oestrus uncovering rate and the oestrus conception rate are increased, a melatonin implant is implanted in a subcutaneous implantation mode on the 63rd day, and the melatonin implant is implanted in a subcutaneous implantation mode on the 63rd day. The synthesis of ovarian hormones is promoted by regulating the hypothalamus-pituitary-gonad axis, the secretion of follicle cell factors and maturation promoting factors is promoted, the development of granular cells is promoted, and the maturation of oocytes is promoted. According to the method, the pregnancy rate of a double-synchronization-timing insemination scheme which is most widely used in a large-scale dairy cow breeding pasture at present can be remarkably increased, and feasible technical support is provided for success of increasing the breeding efficiency of cows.

The utility model relates to the field of medical instruments. The hysteroscope liquid collecting barrel comprises a collecting barrel body, a floating groove is formed in the lower side of one end of the collecting barrel body, a floating block is slidably inserted into the floating groove, a separating barrel is attached to the upper end of the collecting barrel body, a sliding groove is fixed to the inner wall of the lower end of the separating barrel, and magnets are fixed to the two ends of the inner wall of the sliding groove. And the upper end of the separation cylinder is in threaded connection with a protective cover. Through cooperative use of the placing box and the filter screen, liquid and secretions in a human body can be separated, when a worker needs to check the secretions, the bolt can be rotated to enable the adjusting blocks to be separated from the separation cylinder, at the moment, the two sets of adjusting blocks are pulled outwards to be separated from the surface of the separation cylinder, and the liquid in the human body can be separated from the secretions in the separation cylinder. And then the separating cylinder is moved upwards, and at the moment, the placing box can be independently taken out for checking, so that the overall working efficiency is improved.

The application discloses a kind of acanthopanax acid polysaccharides with intestinal protection function and its preparation method and application, belong to the field of functional food and biotechnology.The acanthopanax acid polysaccharide is by water extraction alcohol precipitation, after impurity removal, through DEAE-52 anion exchange column elution and collection 0.2 mol / L NaCl elution peak, and the uniform component obtained by Sephadex G-100 gel column chromatography purification.Its uronic acid content is 30%-40%, weight average relative molecular weight is 50-100kDa, mainly by glucose, galactose, galacturonic acid and arabinose, infrared spectrum has carboxyl characteristic absorption peak at 1736 cm-1 and 1615 cm-1.Experiments prove that the acanthopanax acid polysaccharide has antioxidant activity and hypoglycemic activity.The acid polysaccharide has protective effect on LPS-induced Caco-2 cell damage, can effectively reduce the secretion of pro-inflammatory factors TNF-α, IL-1β, IL-6, and improve the level of anti-inflammatory factor IL-10.The acanthopanax acid polysaccharide can be prepared into oral liquid, tablet candy, solid beverage and other functional food forms.

The application discloses a method for preparing cell-derived exosomes and products and applications thereof, and the method comprises the following steps: co-culturing immune-activated programmable cells with a stimulating agent with immune-activation effect, and collecting the cell-derived exosomes with immune activity by a natural secretion collection method or an artificial extrusion collection method. The application has safe and controllable local immune activation, and the immune activation strategy based on the exosomes fully overcomes the safety bottleneck of traditional live bacterial preparations in tumor treatment. By replacing live bacteria with engineered exosomes, not only potential risks such as systemic inflammatory response and infection are effectively avoided, but also the local controllability of immune stimulation signals is ensured, the precise activation and directional regulation of tumor region immune cells are realized, the tumor microenvironment is reshaped, the anti-tumor effect is strengthened, and the broad-spectrum cross-tumor potential is verified across models.

The invention discloses nucleus pulposus cells as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The method comprises the steps that exosomes are collected from immortalized spherical nucleus pulposus cells and used for culturing the nucleus pulposus cells, the cultured nucleus pulposus cells have higher multiplication capacity, and large-scale in-vitro amplification of the nucleus pulposus cells is achieved; meanwhile, the cultured nucleus pulposus cells have higher extracellular matrix secretion capacity. The cultured nucleus pulposus cells are used for treating the intervertebral disc degeneration disease, the clinical use requirement can be met, and an effective treatment scheme is provided for treating the intervertebral disc degeneration disease.

The present disclosure provides a method for identifying protein secretion modulators. Also provided are protein secretion modulators and uses thereof.

The invention discloses an application of silibinin in enhancing the immunomodulatory function of stem cells, and relates to the technical field of biological medicines. The silybin is applied to the composition for enhancing the immunoregulation function of the stem cells, the composition comprises the silybin and umbilical cord-derived mesenchymal stem cells, and the immunoregulation function of UC-MSCs is enhanced by adjusting the interaction of ICOS / ICOSL axes based on the combined action of the silybin and the umbilical cord-derived mesenchymal stem cells. The silybin disclosed by the invention is competitively combined with the ICOS, so that the interaction of the ICOS / ICOSL is blocked, and the immune regulation function of the umbilical cord-derived mesenchymal stem cells is remarkably enhanced; therefore, the UC-MSCs show a stronger immunosuppression effect in both in-vitro and in-vivo experiments; silybin not only acts on an ICOS / ICOSL axis, but also inhibits secretion of inflammatory factors through a PI3K / AKT signal channel, so that a multi-mechanism synergistic treatment effect is achieved.

A new technique for improving the secretion production of a heterologous protein by a coryneform bacterium is developed, and thus a method for the secretion production of a heterologous protein is provided. A coryneform bacterium having a secretion production ability of a heterologous protein and modified to maintain a phoS gene having a specific mutation is cultured to produce a heterologous protein by secretion.

This invention discloses an anti-inflammatory peptide derived from pearl oysters and its applications, relating to the field of bioactive peptide technology. The amino acid sequence of this anti-inflammatory peptide is TAMY. The anti-inflammatory peptide derived from pearl oysters provided by this invention can regulate the release of cellular inflammatory mediators, reduce the levels of NO and pro-inflammatory cytokines (such as TNF-α, IL-6, and IL-1β), and simultaneously promote the secretion of anti-inflammatory cytokines (such as IL-10), exhibiting excellent anti-inflammatory activity and suitable for use in functional foods, cosmetics, or pharmaceutical ingredients.

The application discloses a gynecological secretion sampling device and relates to the technical field of gynecological examination, which is used to solve the problem that the existing device cannot perform multiple sampling operations without multiple insertions and extractions. The device comprises an outer tube, a linkage type sampling mechanism is arranged in the outer tube, and a plurality of sampling pieces are arranged in a sampling piece mounting cavity in the outer tube. The outer push rod is pushed into the inner part of the outer tube, the sampling pieces are pushed to the clamping ring on the opening plate at the front end of the outer tube through the action of air pressure, the opening plate and the sampling pieces are opened from the side part of the outer tube through the connecting rod assembly, meanwhile, the swab in the sampling piece is rotated to sample the secretion of the inner wall of the vagina, the opening plate is reset by the elasticity of the inner wall of the vagina, then the outer push rod is rotated, the sampling piece that has completed sampling is pushed into the recovery cavity through the recovery push rod, the outer push rod is pulled out, the sampling piece is taken out, the outer push rod is pushed in again, the next sampling is performed through the subsequent sampling piece, and the outer tube does not need to be taken out from the vagina.

The invention discloses bifidobacterium longum subsp. Infantis for regulating intestinal motility and aquaporin and application of the bifidobacterium longum subsp. Infantis, and belongs to the technical field of microorganisms. According to the invention, the bifidobacterium longum subsp. Infantis CCFM1269 is screened, and the bifidobacterium longum subsp. Infantis CCFM1269 has the effects of intestinal motility and aquaporin, specifically, the defecation frequency is reduced, and the water content of excrement and the small intestine propulsion rate are reduced. The intestinal motility abnormality is relieved by reducing the levels of neurotransmitters 5-HT, SP and VIP, and the intestinal moisture absorption and secretion are regulated by improving the mRNA expression of aquaporin AQP4 and AQP8. Meanwhile, the intestinal flora is adjusted by improving the diversity of the intestinal flora, and the content of propionic acid and butyric acid in excrement is increased.

The invention relates to a method for rapidly preparing vernonia anthelmintica dealicin from vernonia anthelmintica dealicin, which comprises the following steps: carrying out ultrasonic extraction by using ethanol, enriching by using macroporous resin to obtain a vernonia anthelmintica dealicin extract, and carrying out extraction and pilot plant test preparative liquid chromatography separation to obtain a high-purity vernonia anthelmintica dealicin compound. The results of subsequent researches show that the vernonia anthelmintica dealicin can significantly inhibit the secretion of the chemotactic factor, and the inhibition rate of 1mol / L of vernonia anthelmintica dealicin on the release level of the chemotactic factor CXCL10 reaches 75.83%. The vernonia anthelmintica macrobrachin reduces the recruitment of self-reactive T cells to the skin by blocking a CXCL10-mediated inflammation signal channel, so that melanocytes are protected, and pigment regeneration is promoted. Therefore, the vernonia anthelmintica macrobrachin inhibits the secretion of the chemotactic factor CXCL10 in a targeted manner, can be used as a potential effective monomeric compound in the development of vitiligo medicines for research, and is expected to become a new strategy for treating vitiligo.