298 results about "Cell damage" patented technology

The invention belongs to the technical field of cytotoxicity intervention, and particularly relates to application of an iNOS inhibitor in preparation of a medicine for relieving cellular injury caused by toxin combined exposure. KK-1 cells serve as a research model, it is shown for the first time that MC-LR and NaNOS combined contamination can remarkably up-regulate the expression level of iNOS protein, and it is found through tests that Nos2 gene silencing can remarkably relieve tight junction damage and cell apoptosis caused by toxin combined exposure in the KK-1 cells; it is revealed for the first time that iNOS is a core target of toxin combined exposure induced cell tight junction damage and apoptosis, and the blank of toxic mechanism research in toxin combined exposure is filled. The application provides a new direction for a detoxification strategy of environmental toxin combined exposure, provides a theoretical basis for developing an iNOS-targeted inhibitor, and also provides a new target for etiological recognition, early diagnosis and prevention of related diseases caused by environmental toxin combined exposure.

The invention provides a specific sequence nucleic acid molecule and application thereof as a PDRN, and relates to the technical field of biology. A novel nucleic acid molecule with a specific sequence is obtained, and the sequence has certainty, biological activity and stable product quality. The PDRN of the specific sequence does not have cytotoxicity, is high in safety and has a wide application prospect. Moreover, compared with the extracted PDRN, the PDRN with a specific sequence is found for the first time, the product has a remarkable effect of promoting VEGF expression, cell damage can be effectively repaired, and a novel skin-care and repairing functional component is provided for the industries of cosmetics and medicines. The invention further provides a preparation method of the PDRN with the specific sequence, and the preparation method is simple and suitable for popularization, application and industrial production.

The invention belongs to the technical field of biological medicines, and particularly relates to a wheat peptide with antioxidant stress activity and a preparation method and application thereof. The invention provides a wheat peptide with antioxidant stress activity. The amino acid sequence of the wheat peptide is as shown in SEQ ID NO: 1. The invention discloses a wheat peptide FGWPGPK for protecting oxidative stress nerve cells as well as a screening method and application of the wheat peptide FGWPGPK. A target peptide fragment is identified from wheat germs through enzymolysis and multi-dimensional screening strategies, and it is proved that the target peptide fragment can significantly improve the survival rate of PC-12 cells damaged by H2O2 (72.88%) and reduce the ROS level (125.54%). The peptide fragment has strong antioxidant activity and nerve targeting property, and is suitable for preventing and treating neurodegenerative diseases such as Alzheimer's disease.

The invention discloses an ergothioneine composition with an anti-aging function, and relates to the field of health-care foods, and the composition has the effects of resisting aging and cell molecule oxidation reaction. The composition disclosed by the invention is prepared from the following composition components: ergothioneine (0.162 to 0.185), a wheat germ extract (0.063 to 0.085), coenzyme Q10 (0.042 to 0.063), quercetin (0.35 to 0.55), a turmeric extract (0.032 to 0.054), a black pepper extract (0.003 to 0.006) and aminobutyric acid (0.205 to 0.227). The composition is used for assisting body functions in eliminating lipid, protein, DNA (deoxyribonucleic acid) and the like in cells damaged by oxidative stress in a body. The composition is prepared into equivalent particles by fully and physically stirring and uniformly mixing, is convenient for human body to absorb, and can remarkably improve the antioxidant capacity and delay the aging process after being taken for a long time. The composition not only can effectively resist oxidative stress disoperation, but also can promote cell repair. The raw materials of the composition can be purchased in the market, and the composition is high in production benefit and beneficial to wide application.

The invention relates to the technical field of biological medicines, in particular to application of an EIF3A inhibitor in preparation of a medicine for treating hepatic fibrosis. The EIF3A inhibitor relieves the hepatic fibrosis process by inhibiting EIF3A expression of hepatic tissue, relieving endoplasmic reticulum stress, inhibiting an NF-kappa B inflammation pathway and reducing pathological damage of hepatic cells, and the EIF3A inhibitor can be selected from a medicine for knocking down or knocking out EIF3A, a medicine for inhibiting EIF3A protein synthesis or a medicine for promoting EIF3A protein degradation. New mechanism research is provided for occurrence and development of hepatic fibrosis, hepatic cell damage and inflammation can be relieved through targeting EIF3A, hepatic fibrosis related pathological phenotypes are relieved, the protection and treatment effects are achieved, safety is higher, and therefore the application has good practical application value.

The invention discloses application of amantadine in inhibition of ITGAV in preparation of medicines for treating dry age-related macular degeneration, and belongs to the technical field of biological medicines. At present, no report for researching the ITGAV gene in the dry AMD exists, the specific action mechanism is not clear, and amantadine adaptation diseases do not include the dry AMD; according to the application disclosed by the invention, the gene target ITGAV is screened from mutual hair generation of microglial cells and RPE cells in a retina microenvironment, and amantadine is used for inhibiting ITGAV protein to relieve the progress of AMD, so that a new thought is provided for treating dry AMD. Experiments show that amantadine can inhibit ITGAV and delay EMT transformation of RPE cells. In a dry AMD mouse model induced by sodium iodate, RPE cell damage can be remarkably relieved by intraocular injection of amantadine, and the structure and function of a retina layer are improved. These results indicate that it may function in early intervention of dry AMD.

The invention provides a stem cell exosome for overexpressing A beta degrading enzyme as well as a preparation method and application of the stem cell exosome. Specifically, the invention provides an application of the stem cell exosome overexpressing A beta degrading enzyme in preparation of drugs, and the drugs are used for at least one of the following: prevention, improvement or treatment of cognitive impairment related diseases; neuronal cell damage is improved; wherein the stem cells for overexpressing the A beta degrading enzyme are prepared through lentivirus transfection. According to the stem cell exosome overexpressing the A beta degrading enzyme, the content of the A beta degrading enzyme is obviously higher than that of the exosome prepared by a traditional method. Therefore, when the compound is prepared into a medicine for treating or preventing cognitive impairment related diseases, the medicine can be efficiently conveyed to the brain, and the concentration of the medicine in the brain is remarkably improved, so that the curative effect is enhanced, the dosage of the medicine can be reduced, the side effect is reduced, and the prognosis of brain diseases is effectively improved.

The invention relates to the field of microorganisms, in particular to a microorganism single cell sorting, collecting and culturing method. The LIFT single cell separation technology and the Raman spectrum technology are combined, rapid identification and culture of specific microorganism single cells in a complex sample are achieved, cell damage is reduced, and blind single cell sorting is avoided. The method is easy to operate, the pretreatment process is convenient, and industrial application is facilitated; the sterilized pure water is used as a micro-liquid separation medium, the components are simple, the Raman spectrum is simple and uniform, and downstream microorganism Raman identification, separation and culture are facilitated; the method can be used as samples of intestinal microflora for sorting low-oxygen microorganisms such as saliva, excrement, urine, tongue coating and the like; the method can also be applied to samples of complex microbial communities, such as low-oxygen environments of deep sea, soil, sludge and the like, and sorting culture of unculturable microorganisms; the method can also be applied to screening and application of special functional microorganisms in the industrial fields of fermentation, pharmacy and the like; the method has great market application potential in micro-ecological research.

The application belongs to the technical field of biology, and particularly relates to an antibacterial polypeptide LAB-129 and application thereof. The application is based on an antibacterial peptide LAB-4 with antibacterial activity from a Shanxi old vinegar source, adopts a random fragmentation strategy to split the complete sequence into multiple short peptide fragments with 5-50 amino acid residues, and screens a new antibacterial peptide LAB-129 with higher antibacterial activity. Compared with the LAB-4, the LAB-129 has stronger antibacterial activity, lower MIC, higher membrane damage capacity and cell damage effect, and exhibits better overall antibacterial effect, thereby laying a good foundation for developing a new microbial proliferation inhibitor to replace traditional antibiotics.

The invention relates to an application of chrysin in preparation of drugs for treating mammalian NFAT2 related diseases. It is confirmed for the first time that chrysin shows significant anti-inflammatory activity in a KD mouse model and a cell injury model. This effect may be achieved by modulating NFAT2. The discovery has important significance for understanding and potentially treating the vascular endothelial injury of the Kawasaki disease, and a new insight is provided for treating the Kawasaki disease by using traditional Chinese medicines.

The invention discloses a tissue preservation solution in organoid construction as well as a preparation method and application thereof. The tissue preservation solution is prepared from the following components: an Advanced DMEM / F12 culture medium, a mycillin / amphotericin B three-antibody mother solution, Glutamax-1, an HEPES buffer solution and a Y-27632 mother solution. The preparation method of the tissue preserving fluid comprises the following steps: adding an Advanced DMEM / F12 culture medium into a centrifugal tube on a super clean bench; then sequentially adding a mycillin / amphotericin B three-antibody mother solution, Glutamax-1, an HEPES buffer solution and Y-27632, and uniformly mixing, so as to obtain the tissue preservation solution. After uniformly mixing, filtering and sterilizing by using a disposable needle type filter, and collecting the preserving fluid into a centrifugal tube; the invention also discloses an application of the tissue preserving fluid in organoid construction. According to the tissue preserving fluid obtained by the invention, in the transportation process, the cell viability in the tissue is improved, the cell damage is reduced, and the success rate of primary cell adherent culture and organoid construction is increased.

The invention discloses application of a compound in preparation of a skin and / or scalp care product, the structural formula of the compound is # imgabs0, and compared with retinoic acid, the compound provided by the invention has higher cell safety concentration and lower irritation, has a more excellent effect in the aspect of cell damage repair, and has a better cell moisturizing effect; compared with the retinyl phytosphingosine, the compound provided by the invention has a better effect in the aspects of inhibiting the activity of elastase and improving type I collagen; compared with retinoyl phytosphingosine, the compound provided by the invention shows a better effect in the aspects of resisting lipid peroxidation and inhibiting malassezia reproduction, and also has better stability. The compound provided by the invention has good application value in the field of preparing cosmetics, medicines and health care products with corresponding effects or indications.

The invention provides a single cell damage detection method and device, computing equipment and a readable storage medium, and belongs to the technical field of microbiological detection. The method comprises the following steps: collecting single-cell Raman spectrum data of microorganisms; performing quality control processing on the single cell Raman spectrum data, and determining a Raman intensity value of the single cell in a predetermined Raman shift interval; inputting the Raman intensity value of the single cell in the preset Raman shift interval into a trained neural network model, and determining a reconstruction error value of the single cell; and determining whether the microbial single cell is damaged based on the difference between the reconstruction error value of the single cell and a reference reconstruction error value. The method has the advantages of non-invasiveness, real-time detection, high sensitivity, high safety, rich information amount, simplicity and convenience in operation and the like in single cell damage detection.

The invention provides an application of a selenium-containing preparation in a drug for antagonizing NK cell injury caused by chemotherapy and a drug for antagonizing cisplatin or adriamycin induced NK cell injury. At present, common cancer treatment methods include operative treatment, chemotherapy, radiotherapy and immunotherapy, and chemotherapy is still a main treatment means for most advanced malignant tumors. Meanwhile, chemotherapy has an inhibition effect on an immune system, which is mainly manifested in that the immune system of a patient is damaged and T cells and NK cells are reduced due to direct killing of chemotherapy drugs on immune cells, so that the normal physiological function of the immune system is influenced, tumor cells can be induced to generate immune tolerance, and the metastasis of the tumor cells is accelerated. The selenium-containing preparation is applied to antagonism of induced damage of cis-platinum or adriamycin to NK cells, damage of cis-platinum or adriamycin to NK cells can be antagonized, and effectiveness of chemotherapy and immunotherapy is improved.

The invention provides a method for detecting the influence of drug-containing serum of Sijunzi decoction on hepatic stem cells. The method comprises the steps of cell culture, drug-containing serum preparation, cell proliferation experiment, cell damage model establishment and treatment, oxidative stress related index detection, protein expression analysis and the like. According to the method, cell activity is detected through a CCK-8 method, cell nucleus morphological change is observed through Hoechst 33342 staining, the apoptosis rate is detected through Annexin V / PI double staining in combination with flow cytometry, apoptosis-related protein expression is detected through Western blot, and the action mechanism of the drug-containing serum is comprehensively evaluated. Experimental results show that the drug serum of the Sijunzi decoction can promote proliferation of liver stem cells, reduce oxidative stress injury induced by H2O2, improve cell viability and oxidation resistance, reduce cell apoptosis rate, up-regulate expression of anti-apoptotic protein Bcl-2 and inhibit expression of pro-apoptotic protein Bax and Cleaved Caspase-3 at the same time.

The present invention belongs to the field of biomedicine, and specifically relates to a light-controlled release of ONOO － Compounds and preparation methods and applications thereof. The present invention provides ONOO ‑ The donor is composed of a diphenyl phenothiazine analogue and arginine covalently linked. Its strong conjugation effect makes it extremely photoresponsive. The polymer has near-infrared light emission and excellent reactive oxygen and reactive nitrogen generation capabilities. When L6 is irradiated with a 660nm laser, it will produce superoxide anions and singlet oxygen. Singlet oxygen oxidizes the guanidine group of arginine to produce NO and ·O2 ‑ and NO to form peroxynitrite (ONOO ‑ ), achieving the goal of highly effective tumor cell killing. Therefore, this compound is a potentially highly effective photosensitizer for tumor killing. Compared to conventional photosensitizers, this killing method has stronger oxidative and nitrative cell damage capabilities, and its development cycle is shorter than that of other photosensitizers, thus possessing great potential application value in clinical treatment.

A method of promoting neuroprotection in a subject from axonal degeneration, neuronal cell death, and / or glia cell damage after injury, augmenting neuronal signaling underlying learning and memory, stimulating neuronal regeneration after injury, and / or treating a disease, disorder, and / or condition of the nervous system in a subject in need thereof includes administering to the subject a therapeutically effective amount of a 15-PGDH inhibitor.

The invention provides an NK cell cryopreservation solution, an NK cell cryopreservation method, a drug, a combined drug and application of the NK cell cryopreservation solution and the NK cell cryopreservation method. The NK cell cryopreservation solution comprises a basic solution and human serum albumin, and the basic solution comprises methyl cellulose and dimethyl sulfoxide. According to the NK cell cryopreservation liquid, the activity recovery rate of the cryopreserved NK cells can be increased, cell damage is reduced, and the recovered and cultured NK cells still have high killing capacity and multiplication capacity. Moreover, the NK cell cryopreservation liquid is simple and reliable in component, can be directly infused into a human body, is easy to prepare and preserve, is suitable for large-scale cell cryopreservation and clinical transformation, and is high in application value.

The present invention provides peptides capable of inhibiting individual activities and inter-pathway communication of BNIP3, BAX and mitochondria. The peptides can be used in methods of treating a disease or disorder in a subject, where prevention of cell damage and cell death is desired.

A YL1-tiRNA for promoting mouse muscle cell injury repair belongs to the technical field of molecular biology, the YL1-tiRNA is formed by cutting mature mt-Tv, a phosphate group is added at the 5th terminal, phosphorylation modification is carried out on the sequence, and a section of sequence is added at the 5th terminal without changing the function of the sequence, the YL1-tiRNA is characterized in that the nucleotide sequence of the YL1-tiRNA is shown as Seq ID No: 1, and the nucleotide sequence of the YL1-tiRNA is shown as Seq ID No: 1. Experiments prove that the YL1-tiRNA can promote mouse muscle injury repair by regulating proliferation of C2C12 cells.

The invention relates to the technical field of food processing, in particular to a freeze-dried broccoli processing method. The invention provides a freeze-dried broccoli processing method which comprises the following steps: taking cleaned broccoli, and cutting the broccoli into small flower types which are consistent in size, shape, thickness and height; carrying out instantaneous fixation by adopting steam, immediately soaking the broccoli subjected to fixation in ice water, fishing out the broccoli, and draining water; stacking the quick-frozen broccoli and the dry ice layer by layer; and after the temperature of the broccoli is reduced to-40 DEG C to-60 DEG C, performing vacuum freeze drying until the water content is less than or equal to 3% to obtain the dehydrated broccoli. According to the method, the loss of functional components such as glucoraphanin and polyphenol is reduced; formation of ice crystals is reduced, cell damage is reduced to the maximum extent, the content of functional components is effectively maintained, the color is close to that of fresh broccoli, and rehydration performance is good; the retention rates of functional components of glucoraphanin, flavone and vitamin C in broccoli all reach 98% or above.

This invention provides specific sequence nucleic acid molecules and their applications as PDRNs, relating to the field of biotechnology. This invention yields novel specific sequence nucleic acid molecules with deterministic sequences, stable biological activity, and stable product quality. The PDRNs with these specific sequences are non-cytotoxic, exhibit high safety, and have broad application prospects. Furthermore, this invention is the first to discover that specific sequence PDRNs, compared to extracted PDRNs, significantly promote VEGF expression and effectively repair cell damage, providing a novel skincare and repair ingredient for the cosmetics and pharmaceutical industries. This invention also provides a simple method for preparing specific sequence PDRNs, suitable for widespread application and industrial production.

The present invention pertains to use of a composition comprising propionic acid and / or salt thereof and at least one fatty acid having 6 to 12 carbon atoms for reducing dormant spore viability, for inactivating dormant conidia, for eliminating or reducing germination of conidia, for increasing cell damage and / or cell death of hyphae, and / or for reducing or eliminating germ tube formation.

The invention belongs to the technical field of biology, and particularly relates to application of peach gum polysaccharide to preparation of a product for protecting skin from heavy metal damage. The invention relates to the field of skin care, in particular to application of peach gum polysaccharide in preparation of skin care products and / or cosmetics for preventing and / or repairing skin heavy metal damage. The invention provides application of peach gum polysaccharide in preparation of a product for preventing and / or repairing heavy metal injury of individual skin. The applicant creatively discovers that peach gum polysaccharide has a very good effect in preventing and / or repairing individual skin heavy metal injury, and the survival rate of injured cells caused by heavy metal can be remarkably improved.

The present invention addresses the problem of providing a novel treatment method for T-cell tumors that can induce cell damage in tumor cells and can be used in the treatment of a T-cell tumor of a subject with T-cell dysfunction. The present invention provides a therapeutic agent for a T-cell tumor of a subject with T-cell dysfunction, said therapeutic agent comprising a bispecific antigen-binding molecule, wherein the bispecific antigen-binding molecule includes (1) at least one section that specifically binds to a target tumor antigen expressed in T-cell tumor cells, and (2) at least one section that specifically binds to an antigen which is a normal T-cell-side target antigen and has a subtype, provided that the target tumor antigen expressed in T-cell tumor cells is not present in normal T-cells, or if present, the normal T-cells are substantially not activated when the bispecific antigen-binding molecule binds to the antigen that is present in the normal T-cells and is the same as the target tumor antigen, and a sufficient ratio of the subtype of the normal T-cell-side target antigen is present such that the normal T-cells are activated by the bispecific antigen-binding molecule binding to the normal T-cell-side target antigen and a sufficient number of activated T-cells for treatment of the T-cell tumor are provided.

The invention relates to ginseng polysaccharide as well as a preparation method and application thereof. The preparation method comprises the following steps: soaking ginseng slices in water, decocting, filtering, collecting filtrate, decocting filter residues in water, filtering, and collecting filtrate; combining the two filtrates, and concentrating to obtain a concentrated solution; adding 95% ethanol into the concentrated solution, standing and centrifuging, and collecting supernate; adding 95% ethanol into the supernate, standing and centrifuging, and collecting the precipitate; adding water into the precipitate for dissolving, then adding trichloromethane and n-butyl alcohol, shaking and standing, taking supernatant, adding trichloromethane and n-butyl alcohol into the supernatant again, shaking and standing, taking supernatant, repeating for many times, and taking final supernatant; adding 95% ethanol into the final supernatant, standing and centrifuging, and collecting the precipitate; and washing the precipitate with 95% ethanol, absolute ethyl alcohol, isopropanol and diethyl ether in sequence to obtain the ginseng polysaccharide. The ginseng polysaccharide prepared by the preparation method disclosed by the invention is brand new ginseng polysaccharide and has the effects of promoting cell proliferation and repairing cells damaged by ultraviolet rays.

The invention relates to the technical field of microbiological detection, in particular to a confocal microbiological and cell multi-fluorescence labeling rapid detection kit and a preparation method thereof.The kit comprises a solution A, a solution B, a solution C, a solution D, a solution E and a solution F. The solutions are simple in composition and convenient to prepare, and the kit can be used for detecting bacterial infection, cell infection and cell infection. And cell damage and sepsis can be rapidly and accurately detected.

The invention relates to the technical field of neutrophile granulocyte separation, in particular to a mouse neutrophile granulocyte separation method which comprises the following steps: (1) anesthetizing and disinfecting a mouse; (2) tissue sampling; (3) tissue digestion; (4) preparing a cell suspension; (5) purifying cells; (6) cell culture; according to the method disclosed by the invention, isoflurane is adopted in the anesthesia disinfection step, so that central nervous activity of mice can be rapidly inhibited, tissue damage caused by stress reaction is avoided, and chemical stimulation can be reduced while body surface microorganisms are cleared through combination of ethanol disinfection and sterile normal saline flushing, and aortic tissues with intact activity are provided for subsequent material taking. In the compound enzyme digestive juice, collagenase I can specifically degrade aortic wall collagenous fibers, trypsin dissociates adhesion connection between cells, neutral protease assists in decomposing elastic fibers, and DNA enzyme I is supplemented to inhibit cell aggregation, so that the contradiction between incomplete digestion and large cell damage of the traditional enzyme juice is effectively solved.

The invention discloses an application of a vinyl quinoline fluorescent dye in preparation of a reagent or a kit for detecting mitochondria or lysosome. The fluorescent dye does not need to be washed, the probe is used for dyeing mitochondria when the mitochondrial membrane potential is normal, and the probe targets lysosome when the mitochondrial membrane potential is reduced, so that the probe can also be used for observing the mitochondrial membrane potential, the influence of washing on the mitochondrial membrane potential and the damage to cells can be avoided, and the applicability is wider.

The present invention discloses an amlodipine drug targeted delivery system and a preparation method thereof. The targeted delivery system can improve the targeting of amlodipine in preventing liver ischemia-reperfusion injury, and the preparation method is simple, with high feasibility and strong practicality. The amlodipine drug targeted delivery system (Am@EXOs) prepared by the present invention enables amlodipine to be distributed in the liver of a mouse model of liver ischemia-reperfusion injury, and achieves precise inhibition of calcium ion overload in liver cells with a minimum dose of amlodipine, thereby reducing cell damage, improving the targeting of amlodipine in preventing liver ischemia-reperfusion injury, and reducing the use cost of amlodipine.