134 results about "Phosphatidylinositol" patented technology

The first aspect of the invention relates to a bispecific antibody, which comprises a first functional domain for specific identification of phosphatidylinositol protein polysaccharide-3, a second domain for specific identification of human T cell antigen CD3, and a connection for connecting the functional domains. The second aspect of the invention relates to a nucleotide sequence encoding the above antibody. The third aspect of the invention relates to a carrier containing the above nucleotide sequence, and includes an expressive vector. The fourth aspect of the invention relates to a eukaryotic or prokaryotic expression system containing the above carrier. The fifth aspect of the invention relates to application of the above antibody to preparation of medicament for treating or preventing tumor.

Attenuated influenza virus variants comprising substitutions in NS1 that interfere with viral replication and phosphatidylinositol 3-kinase activation are described. NS1 variant polypeptides, polynucleotides encoding NS1 variant polypeptides, a reverse genetics system for producing attenuated influenza virus NS1 variants, immunogenic compositions comprising live attenuated influenza virus NS1 variants, methods of stimulating an immune response against influenza virus, methods of interfering with influenza virus replication, and methods of treating and preventing influenza virus infection are described.

The invention relates to the medical field of immunoassay, more specially, the invention provides a chemiluminescent immunoassay detection kit for phosphatidylinositol proteoglycan-3(GPC-3) and a preparation method thereof, and realizes the simultaneous serological detection of GPC-3 N terminal and C-terminal protein with the chemiluminescent immunoassay method. The kit has the advantages of simple sampling, convenient detection and accurate and specific technical method. The invention adopts a biotin-strapavidin system to coat antibodies and improve the efficiency of antibody coating and the linear range of detection as well as sensitivity, and can be conveniently used for the tracing observation of early diagnosis or treatment effect for primary carcinoma of liver.

A modified phospholipase D having an ability to synthesize phosphatidylinositol which contains: (A) an amino acid sequence derived from the amino acid sequence represented by SEQ ID NO:2 by substitution of at least one of the amino acid residues at the 187-, 191- and 385-positions by other amino acid residue(s); or (B) an amino acid sequence of a polypeptide derived from the amino acid sequence as described in the above (A) by substitution, deletion, insertion and/or addition of at least one amino acid residue at a position different from the 187-, 191- and 385-positions and having an ability to synthesize phosphatidylinositol. By using this modified phospholipase D, phosphatidylinositol can be efficiently produced from a phospholipid. It is also intended to provide a method of screening a phospholipase D having an ability to synthesize an acylglycerophospholipid having glycol group.

The invention belongs to the field of medical technology, and in particular relates to a selective phosphatidylinositol-3 kinase delta inhibitor shown in the formula (I), a salt of the selective phosphatidylinositol-3 kinase delta inhibitor, accepted in pharmacy, and a stereoisomer or a deuterated material of the selective phosphatidylinositol-3 kinase delta inhibitor, wherein X1, X2, X3, X4, Y, Z, W, R1 and R2 are defined as specification. The invention also relates to a preparation method of the compounds, medicinal preparations containing the compounds and application of the compounds in preparation of drugs for treating and/or preventing inflammatory diseases or tumors.

A liver cancer marker phosphatidylinositol proteoglycan 3 (Glypican-3, GPC3) is used as a research object, a GPC3 aptamer is used as a recognition probe, on the basis of good electron transfer effectand excellent loading capacity of a reductive graphene oxide-chitosan-ferrocene/nano platinum and palladium (Pt-Pd NPs/RGO-CS-Fc) composite material, the GPC3 aptamer can specifically recognize and becombined with GPC3 protein, and a novel aptamer sensor capable of performing specific recognition and quantitative analysis on the GPC3 protein is constructed and used for detecting the content of GPC3 in serum. The method is simple to operate, time-saving, low in cost and relatively low in detection limit.

The invention relates to a phosphatidylinositol proteoglycan GPC3 protein fragment, which has an amino acid sequence represented as the SEQ ID NO.1. The GPC3 protein fragment is strong in antibody specificity, can be used for preparing a polyclonal or monoclonal antibody being high in titer or preparing a GPC3 protein standard sample, and can be used in GPC3 protein detection, comprising detections of the content, the activity and the structure. The invention also relates to a monoclonal antibody hybridoma cell strain GPC3-1H5. A GPC3 antibody secreted from the GPC3-1H5 is high in yield and titer and is sensitive in reaction, so that the GPC3 antibody can improve sensitivity and accuracy of detection. The GPC3-1H5 can be widely applied in the detection of expression of the GPC3, can reduce the production cost of the GPC3 and is beneficial to clinical popularization and application of GPC3 detection.

The invention discloses a metabolite marker for diagnosing and distinguishing coronary atherosclerosis and stable angina pectoris. The metabolite marker includes one or more of phosphorylcholine, palmitoylethanolamine, phytosphingosine, phosphatidylcholine, ethyl chenodeoxycholic acid, lysophosphatidyl choline (16:0), lysophosphatidyl choline (18:2) and phosphatidyl inositol (20:4/0:0). When the single metabolite marker is used for diagnosing and distinguishing a patient suffering from the stable angina pectoris and a patient suffering from the coronary atherosclerosis, the ROC areas under the curve (AUC) are greater than 0.7, and the marker has clinical diagnostic significance. When the markers are combined for diagnosis, the AUC is further improved with the increase of the combination number; when all eight markers are combined, the AUC is the highest and is up to 0.985, and the sensitivity and specificity are 97.4% and 98.0% respectively under the condition of an optimal cutoff value. The metabolite marker can accurately diagnose and distinguish the coronary atherosclerosis and the stable angina pectoris and is high in accuracy and good in sensitivity and specificity.

The present invention provides methods for identifying agents that increase lifespan and increase resistance to oxidative and/or electrophilic stress. Also provided are methods for identifying biomarkers of longevity or identifying pathways governing longevity in response to phosphatidylinositol 3,4,5-triphosphate signaling.

The present invention relates to a method of enhancing fruit ripening and stability and of delaying senescence in fruit and other plant tissues. This method consists of applying an effective amount of a lysophospholipid, such as lysophosphatidylethanolamine (18:1) (hereinafter referred to as LPE (18:1)) or lysophosphatidylinositol (hereinafter referred to as LPI) to the fruit and other plant tissues. Lysophospholipids such as LPE (18:1) and LPI were found to be superior to other lysophospholipids in delaying senescence and in inhibiting phospholipase D, a key enzyme in mediating membrane deterioration during of plant senescence. LPE (18:1) and LPI are naturally occurring and environmentally safe. Their use could replace many environmentally toxic compounds that are currently being used to retard senescence of flowers, fruits and leaves and to enhance fruit ripening.

The present invention relates to methods of treating Alzheimer's Disease which utilize agents that increase neuronal phosphotidylinositol 4,5-biphosphate (PIP2), and to differentiated stem cell-based assay systems that may be used to identify agents that modulate phosphoinositide levels and thereby treat a variety of diseases. It is based, at least in part, on the discovery that edelfosine, an agent that increases PIP2 levels by inhibiting an enzyme that catalyzes PIP2 breakdown, decreases levels of neurotoxic A&bgr;42 peptide, particularly in cells expressing a mutant presenilin gene associated with Familial Alzheimer's Disease.

The invention discloses a complete humanized antibody which is selected from humanized high-capacity phage antibody library and is high-affinity-combined with phosphatidylinositol proteoglycan 3. The invention includes a selection method of the antibody, an antibody coding sequence and corresponding amino acid residue sequence, and especially includes three CDR-zone sequences respectively at a heavy chain and a light chain, combination characters of an antigen and the construction method of the complete antibody. The antibody is a complete humanized antibody, is used for treatment in human body, is low in immunogenicity, is less in toxic and side effects, and has a potential value of treating liver cancer and melanin tumor.

The invention discloses a breast cancer-related kinase mutation detection panel. The detection panel comprises receptor tyrosine kinase (RTK), phosphatidylinositol 3-kinase (PI3K), mitogen-activated protein kinase (MAPK) related genes, and an exon region and a part of intronic regions of a downstream gene. The invention further discloses a kit containing the detection panel. The detection panel can detect gene mutation guiding diagnosis and treatment more efficiently, is of great significance to clinical diagnosis and discovery of a target spot of target treatment, and can help lower gene detection cost of patients.

The invention relates to a method for preparing AS-605240 and an application thereof on medicines for treating inflammatory diseases. An improvement of the preparation method disclosed to the international patent is supplied to 5-quinoxaline methylene-2, 4-thiazolidinedione (AS-605240 with a structural formula I). 3, 4-diaminotoluene and glyoxal water solution as raw materials are relatively easy to obtain, reactive reagent, such as sodium bicarbonate, N-bromosuccinimide, carbon tetrachloride, and the like in each step is cheap and easy, and the reaction condition is mild. A great deal of mouse experimental curative effect observation of myocarditis, acute and chronic hepatitis, acute colitis and pancreatitis, which is induced by concanavalin A, is performed by the AS-605240, and the favorable curative effects of the AS-605240 are all confirmed. The prior TZDs, such as troglitazone, and the like are mainly used for aspects on treating diabetes mellitus, angiocardiopathy, and the like. In recent years, a study confirms that the AS-605240 protects the mouse joint and treats rheumatoid arthritis through restraining an osphatidylinositol 3 (PI3K) kinase gamma subtype signal way, therefore, the AS-605240 application on medicines for treating the inflammatory diseases opens up a new medical treatment field on the discovery of thiazolidinedione compound.

The invention provides a hepatocellular carcinoma vaccine targeting secondary lymphoid tissues. The vaccine comprises fusion protein comprising (a) phosphatidylinositol proteoglycan-3 (GPC3) and (b) lymphocyte chemotactic factor (XCL1) polypeptide of a specifically bonded chemokine receptor 1 (XCR1), nucleic acid encoding the fusion protein and vectors of the nucleic acid, wherein (a) is connectedwith (b) through a linker, and (a) lacks amino acid residues with a cell membrane anchoring effect. The vaccine comprises the fusion protein, the nucleic acid and/or the vectors, and application of the fusion protein, the nucleic acid and/or the expression vectors in prevention and treatment of liver cancers is provided. The vaccine has the effect of intervention of generation and development ofliver cancers, and can be applied to intervention of high-risk population of liver cancer, and for example, the vaccine can be applied to intervention of the generation progress of hepatitis B-relatedpatients to liver cancers.

The present invention relates to novel synthetic analogues of phosphatidyl-myo-inositol mannosides (hereinafter referred to as PIMs) of general formula (I): or a pharmaceutically acceptable salt thereof, to the method for preparing same and to the use thereof in the prevention or treatment of a disease associated with the overexpression of cytokines or of chemokines, in particular of TNF and/or of IL-12. The invention also relates to a pharmaceutical composition comprising at least one synthetic derivative of PIM.

The invention discloses a research method for the pharmacologic action of mangiferin on mouse diabetes. The research method comprises material selection and an experimental method, biochemical parameter evaluation, histological analysis, measurement of reactive oxygen species (ROS), determination of malondialdehyde (MDA) and antioxidase, analysis of renal tissue inflammatory factors, immunofluorescent staining, Western blotting and statistic analysis. According to the research method, a trichrome staining method is utilized to observe renal morphology; a kit is utilized to determine a blood biochemical index; levels of inflammatory cytokines, the antioxidase, the MDA and the ROS are determined; expression of fibronectin, collagen I and alpha-SMA is detected by an immunohistochemical method, and regulation of paths of TGF-beta 1 and phosphatase and tensin homolog/phosphatidylinositol 3-hydroxy kinase/protein kinase B (PTEN/PI3K/Akt) is detected by Western blotting; researches show thatthe mangiferin can significantly improve the renal dysfunction of diabetic mice; renal interstitial fibrosis can be prevented by reducing positive expression of fibronectin (FN), collagen type I (ColI) and alpha-smooth muscle actin (SMA) during therapy with the mangiferin; and meanwhile, mangiferin increases the antioxidase, reduces phosphorylation of the PI3K and Akt, inhibits the renal interstitial fibrosis, and provides more theoretical foundations for clinical application of traditional Chinese medicine in treating diabetes.

The invention discloses application of PI3K (Phosphatidylinositol 3-Kinase) inhibitor to preparation of a medicine for treating related diseases of thrombocytopenia. Firstly, an experiment explores the effect of PI3K in a process of clearing platelets and proves that activation and apoptosis of the platelets of patients with the thrombocytopenia occur. An anti-Ibalpha antibody induces PI3K activation and Akt is activated after the PI3K is activated; the Akt is used for mediating the activation and apoptosis of the platelets. The Akt is used for regulating and controlling the apoptosis of the platelets through phosphodiesterase mediated protein kinase A. PS (Phosphatidylserine) is exposed after the apoptosis and activation of the platelets and is phagocytized by macrophages of liver. The activation of the PI3K is inhibited, the activation and apoptosis of the platelets are inhibited and the clearance of the platelets is stopped; the PI3K inhibitor can be used for treating the related diseases of platelet quantity changes and the thrombocytopenia in peripheral circulating blood is inhibited, so that the inhibitor has a potential of being prepared into novel platelet protection medicines and medicines for treating the thrombocytopenia, and extremely good scientific research and economic value.

Methods are provided for treating fibrotic diseases and conditions or cancer and other dysproliferative diseases by administering to a subject in need there of a therapeutically effective amount of a synergistic composition comprising a phosphatidylinositol 3-kinase inhibitor and a retinoid, optionally including a CYP26 inhibitor, wherein the therapeutically effective amount suppresses fibrosis or the growth of dysproliferative cells in vivo. Compositions comprising a combination of a phosphatidylinositol 3-kinase inhibitor and a retinoid, optionally in combination with a CYP26 inhibitor, are also described.

The invention provides a fructan consisting of 25 beta-D-fructoses and 1 alpha-D-glucose, and a method for preparing the fructan from Hubei dwarf lilyturf tuber serving as a raw material. The fructan has obvious effect of reducing blood sugar of mice with type 2 diabetes, simultaneously improves the sugar tolerance of the mice with the type 2 diabetes, and obviously enhances the expression of insulin receptor (InsR), insulin receptor substrate (IRS-1), protein kinase and phosphatidylinositol3-kinase (PI3-K) to further accelerate the glucose to be converted into glycogen and improve the activities of glucose-6-phosphate and glucose-6-phophatase so as to obvious reduce the insulin resistance.