143 results about "Activity inhibition" patented technology

The invention discloses a hexapeptide with a hypoglycemic effect as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The amino acid sequence of the hexapeptide is Ile-Trp-Asp-Pro-His-Phe, and the amino acid sequence of the hexapeptide is as shown in the specification. The novel hexapeptide IWDPHF with prominent DPP-IV inhibition ability is successfully identified from mulberry leaf proteolysis products through liquid chromatography-mass spectrometry and a virtual screening method, the hexapeptide IWDPHF shows the blood glucose reducing effect superior to that of part of known peptides in an in-vitro enzyme activity inhibition experiment and a zebra fish hyperglycemia model, and no obvious side effect exists; the compound has a good potential of being developed into a hypoglycemic functional product or a drug lead compound. The invention further provides the mulberry leaf peptide with the peptide fragment IWDPHF, and the mulberry leaf peptide can be applied to preparation of drugs or food for reducing blood sugar. The invention provides a new scheme and theoretical basis for treatment of diabetes, and has good market prospect and application potential.

The invention relates to a pesticide residue detection test strip as well as a preparation method and application thereof, in particular to a rapid detection technology based on an enzyme inhibition method and a chitosan non-woven fabric carrier. The test strip can specifically detect organophosphorus and carbamate pesticides such as trichlorfon, malathion and phoxim through the enzyme activity inhibition principle, the detection limit of the pesticides such as phoxim is as low as 0.1 mg / kg, the developing intensity is in negative correlation with the pesticide concentration, and semi-quantitative judgment can be achieved. The preparation process is simple, the chitosan non-woven fabric is adopted as a fixed carrier, the material is environment-friendly and degradable, the enzyme activity recovery rate reaches 90%, the stability is excellent (the enzyme activity recovery rate can be preserved for 60 days at the temperature of 4 DEG C in a dark place), sample pretreatment is not needed in detection operation, a result can be obtained at the normal temperature for 15 min, the stability and repeatability are good, and the problems that a traditional instrument is high in detection cost and long in time consumption are solved; the method has a remarkable basic popularization value.

The invention provides an application of atractylis lactone as a beta-glucuronidase inhibitor. Experiments find that atractylenolide can act on active sites of beta-glucuronidase to generate various bonding effects and play an inhibition role, and atractylenolide shows a dose-dependent relationship on activity inhibition of beta-glucuronidase. Furthermore, the atractylenolide can be used as a beta-glucuronidase inhibitor for preventing and treating related diseases (such as drug-induced diarrhea, diabetes mellitus, calculus and the like), and has very good research and application values.

The invention discloses a method for enhancing squalene synthesis through oil tea HMGR gene editing. According to the method, phosphorylation regulation and control sites Ser47 and / or Thr208 recognized by MAPK are targeted, and enzymatic activity inhibition is relieved and metabolic flux is enhanced by constructing phosphorylation resistance mutants (such as Ser-> Ala and Thr-> Val). The constructed editing vector can be introduced into camellia oleifera tissues in manners of PEG-mediated protoplast transient transfer, agrobacterium infection of calluses and the like, so that stable expression is realized. Experiments prove that the enzyme activity of HMGR in the editor is remarkably improved, the squalene accumulation amount is increased by 50% or above, the editing efficiency is high, expression is stable, and the method is suitable for high-value development of plant triterpenoid functional components and excellent strain breeding. The method also has the potential of popularization and application in other triterpenoid synthetic crops.

The invention discloses an application of an MDH2 gene and an inhibitor thereof in resisting ZEA toxin, and relates to the technical field of biology. An MDH2 gene deletion cell line is obtained through CRISPR gene editing, and compared with a wild type MDH2 gene expression cell, under the influence of ZEA, the cell activity of the MDH2 gene deletion cell line is remarkably improved, and the cell apoptosis rate is remarkably reduced. In addition, the LW6 inhibitor is used for inhibiting the MDH2 activity of wild type IPEC-J2 cells, and the tolerance of the cells to ZEA can also be improved. Therefore, through knockout, mutation or activity inhibition of the MDH2 gene, the ZEA resistance of people, animals and plants can be improved. The invention provides a potential solution way for solving untoward effects caused by ZEA (Zinc Ethylenediamine).

The present invention relates to modulators, e.g., double stranded RNA (dsRNA) agents, antisense polynucleotide agents, antibodies, guideRNAs that effect ADAR editing, or guideRNAs that effect CRISPR editing, that modulate, e.g., inhibit, the expression and / or activity of inhibin subunit beta E (INHBE). The invention also relates to methods of using such modulators to inhibit expression and / or activity of INHBE and to methods of preventing and treating an INHBE-associated disorder, e.g., metabolic disorder, e.g., metabolic syndrome, in a subject.

Disclosed herein are compounds used as inhibitors of KAT6 and pharmaceutical compositions comprising the compounds. Also disclosed are methods for treating a disorder or disease responsive to the inhibition of KAT6 activity in a subject. In an embodiment, the compounds are of formula (I) or a pharmaceutically acceptable salt thereof, or a deuterated analog thereof, or an N-oxide thereof, or a tautomer thereof, wherein values for the variables (e.g., ring B, A', A2, A3, A4, A5, Xl, L, R62, R63, R64, R7, and n) are disclosed herein.

The invention belongs to the technical field of bioengineering, and particularly relates to leuconostoc mesenteroides subsp. Mesenteroides XD054 and application thereof in fermentation of dendrobium officinale. The leuconostoc mesenteroides subsp. Mesenteroides XD054 is preserved in the China Center for Type Culture Collection, and the preservation number is CCTCC NO: M 20241728. Dendrobium officinale is subjected to enzymolysis by cellulase, pectinase and papain and then fermented by the strain to obtain dendrobium officinale fermentation liquor, and the dendrobium officinale fermentation liquor has an obvious pancreatic lipase activity inhibition effect.

To provide anti-ASGM1 monoclonal antibodies of which administration to mice and rats reduces the NK activity in vivo and / or to provide IgG type anti-ASGM1 monoclonal antibodies useful for immunoassay to detect NK cells.SOLUTION: An IgG type rabbit anti-ASGM1 monoclonal antibody that exhibits very strong in vivo inhibition of NK activity when administered to a mouse can be obtained with high efficiency by immunizing an animal not belonging to Rodentia with ASGM1 and preparing a monoclonal antibody from the lymphocytes of the immunized animal.SELECTED DRAWING: None

Provided are a class of compounds, a stereoisomer, an optical isomer, a pharmaceutically acceptable salt, a prodrug, a solvate (for example, a hydrate) or an isotope derivative thereof. The compounds have a tri-heterocyclic structure (for example, the structure represented by formula (A)), which is a novel structure, thereby providing a new direction for the development of SOS1 inhibitor drugs. In-vitro enzyme activity inhibition activity studies show that the compounds have a relatively strong inhibition effect on SOS1 and can be used as a prospective compound for preventing and / or treating SOS1-mediated diseases. Moreover, said compounds also exhibit significant inhibitory activity on NCI-H358 cell proliferation. Furthermore, a specific synthesis method is provided. The synthesis method is simple in process, convenient to operate and beneficial to large-scale industrial production and use.

Provided is a lipase mutant with alleviated inhibition of activity against a dispersed substrate in the presence of a surfactant. The lipase mutant consists of an amino acid sequence having an identity of at least 75% with the amino acid sequence of SEQ ID NO: 2, 4, 6, or 8 and has a predetermined amino acid residue at a predetermined position numbered according to SEQ ID NO: 2.

The invention belongs to the field of biological medicine, and particularly relates to application of an active component based on a radish seed extract as an angiotensin converting enzyme inhibitor. The active ingredient is sinapine (sinapine) or nasturtoside (Gluconatutin), and the active ingredient is one or more than one of the active ingredients. According to the invention, affinity ultrafiltration is combined with a UPLC-Orbitrap-MS method, potential inhibitors are rapidly screened and identified on line from radish seeds, the affinity of active compounds and ACE is researched by combining molecular docking through ACE activity inhibition experiments, and finally two potential ACE inhibitors, namely sinapine and nasturtoside, are determined by combining an affinity ultrafiltration RBA value, IC50 and a binding force of molecular docking. And further research is carried out after screening, so that the research range is greatly reduced, the time of new drug discovery and research and development processes is saved, and the screening cost and risk are reduced.

The invention belongs to the technical field of drug screening, and particularly relates to an in-vitro high-throughput screening system of a PHD2 activity inhibitor and application of the in-vitro high-throughput screening system. The in-vitro high-throughput screening system for the PHD2 activity regulator comprises a pore plate, a small molecule reaction system, an FITC (fluorescein isothiocyanate) labeled peptide fragment and a VBC compound, wherein a GST-PHD2 protein is attached to the surface of an inner cavity of the pore plate; the sequence of the GST-PHD2 protein is shown as SEQ ID NO. 1, the small molecule reaction system contains Tris-HCl, alpha-ketoglutarate disodium and vitamin C, the sequence of the FITC labeled peptide fragment is shown as SEQ ID NO. 2, and the sequence of the VBC compound is shown as SEQ ID NO. 3. The in-vitro high-throughput screening system can sensitively, accurately and efficiently detect the inhibiting effect of small molecular compounds on PHD2 protein activity, and has important scientific value and application prospect.

Provided are substituted tricyclic compounds as PARP inhibitors and the use thereof. The compounds represented by Formula (I) as below, wherein, the ring Z, Z1, Z2, Z3, Z4, Z5, A1, A2, A3, L and Cy are defined herein. The compounds of Formula I are PARP inhibitors and thus are useful in the treatment of diseases, disorders and conditions, such as cancer, responsive to the inhibition of PARP activity.

The present invention relates to the biological field. Further, the present invention provides the use of iPSC induced differentiation into pancreatic progenitor cells combined with medication for the treatment of diabetes. Specifically, the present invention provides a monoclonal antibody that specifically inhibits the activity of BMP4, which can inhibit the differentiation of iPSC cells into common osteoblasts and adipocytes by inhibiting the activity of BMP4 protein, thereby promoting the transformation of iPSC into pancreatic progenitor cells and differentiation into islet-like cells. After the islet-like cells and ginsenoside Rb3 are combined to prepare a drug kit, the effect of lowering blood sugar can be significantly improved, and it has a good prospect for drug application.

Provided here are methods directed to the T cell receptor cloning of heat shock protein 60 (HSP60), the generation of HSP60-specific regulatory T cells (Tregs), and adoptive cell transfer of HSP60-specific Tregs for the treatment of autoimmune and other disorders. Methods of treatment also include administering a therapeutically effective amount of an inhibitor of expression or activity of nucleus accumbens-associated protein- 1 (NAC1) along with the HSP60-specific Tregs.

The invention discloses a cyclic compound serving as a multi-target kinase inhibitor and a preparation method of the cyclic compound. The multi-target kinase inhibitor disclosed by the invention is shown in a general formula I, and R1, R2, R3, R3a, L1, L2, L3, ring A and ring B are shown in the description and claims. The invention also discloses a preparation method of the general formula I and an activity inhibition test result of the general formula I for inhibiting various kinases. The compound as shown in the general formula I can be used for preparing medicines for treating neurodegenerative diseases such as cancer and Parkinson's disease. # imgabs0 #

The invention relates to the field of protein, in particular to a milk-derived peptide APPSPIGVF with antihypertensive activity as well as a preparation method and application of the milk-derived peptide APPSPIGVF, and the amino acid sequence of the milk-derived peptide APPSPIGVF is Ala-Pro-Pro-Ser-Pro-Ile-Gly-Val-Phe. An angiotensin converting enzyme activity inhibition experiment, an alpha-amylase activity inhibition experiment and a dipeptidyl peptidase-4 activity inhibition experiment prove that the milk-derived peptide APPSPIGVF has very good functions of resisting hypertension and reducing blood sugar. The milk-derived peptide APPSPIGVF disclosed by the invention has an anti-hypertension capability, and can be used for remarkably inhibiting the activity of alpha-amylase and dipeptidyl peptidase-4, improving the capability of resisting chronic diseases such as hypertension and hyperglycemia of an organism, reducing the morbidity of the organism and improving the quality of life; the method has very important significance for developing food, health care products and medicines with the functions of resisting hypertension and reducing blood sugar.

The invention discloses a novel application of a pyrrolone benzenesulfonamide compound, the compound has obvious antiviral activity and low cytotoxicity, can be used as an allosteric inhibitor of coronavirus 3CL protease (3CLpro), and especially shows efficient inhibition capability on SARS-CoV-2 3CLpro. An enzyme activity test and molecular dynamics simulation result shows that the compound is combined with a 3CLpro allosteric site to induce the volume of a catalytic pocket to shrink, so that enzyme activity inhibition is realized, and the drug resistance risk caused by active site mutation is avoided. In-vitro antiviral experiments further show that the compound has a strong inhibition effect on SARS-CoV-2 wild type and various drug-resistant mutant strains (such as E166V and S144M), the EC50 value is as low as the nanomole level, the selection index is high, and the safety is good. Besides, based on the high conservative property of 3CLpro in different coronaviruses, the compound provided by the invention also shows inhibitory activity on other coronaviruses 3CLpro such as SARS-CoV, MERS-CoV and the like, and has broad-spectrum antiviral potential. The compound can be used for preparing medicines for preventing, relieving or treating related diseases caused by coronavirus infection, and has a good clinical application prospect.

The invention discloses a formula and application of a compound infertility agent containing clarithromycin and quinestrol and based on CYP enzyme activity inhibition. The clarithromycin composition comprises clarithromycin, quinestrol and baits. The CYP enzyme inhibitor and the endocrine sterilant are combined for use, so that the synergist can effectively inhibit the activity of CYP enzyme in tissues such as livers of rats, the metabolic clearance rate of the sterilant is remarkably reduced, and the oral bioavailability and the system exposure level of the sterilant are improved. Therefore, when the same infertility effect is achieved, the use dosage of the infertility agent can be greatly reduced, so that the cost is saved, and the environmental load is reduced; or under the same dosage, a more thorough and more lasting population sterility effect can be obtained, and the practicability and competitiveness of a pest mouse sterility control technology are greatly improved.

Provided are ADAM9 modulating peptides and methods for using the same to modulate ADAM9 biological activities in vitro and / or in vivo, to inhibit ADAM9 biological activities associated with diseases or disorders in subjects, to decrease inflammation, and to inhibit undesirable cellular proliferation, fibrosis, and angiogenesis. In some embodiments, the ADAM9 modulating peptides include modifications of one or more amino acids of the human ADAM9 prodomain amino acid sequence, and in some embodiments the ADAM9 modulating peptides include other modifications such as but not limited to the addition of PEG groups.

The invention belongs to the field of biological analysis and detection, and particularly relates to a method for screening a listeria monocytogenes hemolysin O inhibitor in vitro, application and the inhibitor. According to the method, hemolysin O inhibitor molecules are screened by detecting fluorescence resonance energy transfer (FRET) signal changes in vitro. The specific method comprises the following steps: firstly, fusing a protein tag to a hemolysin O protein through a genetic engineering method, then respectively covalently labeling FRET donor-receptor fluorescent small molecules to the hemolysin O through specific combination of tag protein and a substrate, and according to the characteristic that the cholesterol-dependent listeria monocytogenes hemolysin O is self-assembled in a solution to form nano-pores, carrying out self-assembly on the listeria monocytogenes hemolysin O to form the nano-pores. The pore-forming activity of the hemolysin O in a solution is monitored through the FRET effect between the assembled small fluorescent molecules, the inhibitor can inhibit assembly of the hemolysin O to weaken the FRET effect of the small fluorescent molecules, and then the pore-forming inhibitor of the hemolysin O can be rapidly screened in vitro through FRET. The screening method has the characteristics of simplicity in operation, rapidness and high sensitivity.

The invention discloses a hemolysin-like protease inhibition composition for regulating vaginal micro-ecological balance as well as a preparation method and application of the hemolysin-like protease inhibition composition. The hemolysin-like protease inhibition composition disclosed by the invention is prepared from 10 to 20 percent of lactobacillus fermentation liquor, 10 to 30 percent of phloretin, 10 to 30 percent of naringenin, 30 to 40 percent of quercetin and 5 to 10 percent of sodium hyaluronate. The preparation method comprises the following steps: dissolving phloretin, naringenin, quercetin and sodium hyaluronate in 50% butanediol in proportion, and ultrasonically mixing uniformly to obtain a mixed solution; and slowly adding the mixed solution into the lactic acid bacteria fermentation solution, and uniformly stirring to obtain the hemolysin-like protease inhibition composition. According to the invention, natural active components with a hemolysin-like protease inhibition effect are screened to construct a synergistic system with three mechanisms of acidification environment regulation, enzyme activity inhibition and barrier repair, so that hemolysin-like protease can be directly inhibited, and the effect of inhibiting the hemolysin-like protease can be achieved by adjusting the local pH value and the micro-ecological environment of the vagina. Propagation of pathogenic bacteria is inhibited, and growth of dominant flora such as lactobacillus is promoted.

The present application discloses novel substituted pyridazine compounds and analogs, their preparation, pharmaceutical compositions comprising them and their therapeutic use as medicaments for the treatment of diseases or conditions associated with modulation of cytokines such as IL-1 [beta] and IL-18, modulation of NLRP3, or inhibition of activation of NLRP3 or components related to inflammatory processes.

The invention discloses a method for researching an inflammatory mechanism of KAT2A in BV2 microglial cells, and belongs to the technical field of BV2 microglial cell research, and the method comprises the following steps: S1, culturing BV2 microglial cells; s2, constructing a BV2 microglial cell inflammation model; s3, carrying out KAT2A activity inhibition treatment and small interfering RNA cell transfection on the constructed BV2 microglial cell inflammation model; s4, performing western blot analysis; s5, carrying out real-time polymerase chain reaction analysis; s6, carrying out cell electron microscope analysis; s7, detecting and analyzing mitochondrial superoxide and active oxygen; s8, on the basis of an analysis result, researching the effect of knocking down KAT2A in a BV2 microglial cell inflammation mechanism; the invention proves that the inflammatory response of the BV2 microglial cells can be relieved by improving the mitochondrial function by inhibiting the expression of the KAT2A.

The application of long non-coding RNA Gm17586 in targeting SIRT1 to induce Smad3 acetylation and promote HSCs activation in liver fibrosis belongs to the field of research on the disease mechanism of liver fibrosis. The present invention establishes an in vitro HSCs cell model and determines that long non-coding RNA Gm17586 can target and regulate SIRT1 activity, inhibit Smad3 deacetylation modification, and then enhance Smad3 transcriptional activity, promote HSCs activation, and thus accelerate the occurrence and development of liver fibrosis through CCK8, RT-qPCR, WB, FISH, CO-IP, dual luciferase reporter gene experiments and other technologies.

The present invention provides a use of an inhibitor of fatty acid synthase (FASN) or its gene activity in the preparation of a drug for treating essential thrombocythemia (ET). The inventors have verified that the FASN small molecule inhibitor and the BASIN The therapeutic effects of gene editors or inhibitory nucleic acids in ET in vitro and in vivo models were evaluated, and the possibility of FASN or its gene as a new target for ET treatment was evaluated, providing new ideas for the clinical treatment of ET.

The invention provides a compound prediction method and device based on artificial intelligence and a medium, and the method comprises the steps: determining a structure information graph according to atomic information corresponding to each atom in a to-be-predicted compound and chemical bonds among a plurality of atoms with interaction force; according to the inter-node feature vector of any two nodes in the structure information graph and the query vector and the key vector corresponding to the two nodes, initial attention weights corresponding to the two nodes are determined; and determining a target attention weight vector corresponding to each node according to the attention range value corresponding to each node and the initial attention weights corresponding to every two nodes so as to obtain activity inhibition results of a plurality of key targets corresponding to the to-be-predicted compound, the interaction influence between each atom in the to-be-predicted compound and the atoms in the local range corresponding to the atom is analyzed, so that the determined activity inhibition result of the key target spot is more accurate, and the data processing amount is reduced.

Provided is a lipase for which activity inhibition by surfactants is reduced and which exhibits a high cleaning effect. A lipase consisting of the amino acid sequence of SEQ ID NO: 14 or an amino acid sequence having at least 91% identity thereto.