31 results about "Proliferative response" patented technology

GM-CSF administered before immunization exerted a sustained suppressive effect against the induction of myasthenia gravis (MG). This suppression was associated with lowered serum autoantibody levels, reduced T cell proliferative responses to AChR, and an expansion in the population of FoxP3+ regulatory T cells. Manipulating DCs to expand regulatory T cells is useful for the control of autoimmune diseases such as myasthenia gravis MG.

The invention provides proliferative response indicator cell having a vertebrate cell having a luciferase encoding nucleic acid and a heterologous proliferation factor receptor encoding nucleic acid, wherein each of the encoding nucleic acids are operationally linked to expression elements for co-expression of a luciferase polypeptide and a heterologous proliferation factor receptor. The invention also provides a method of determining a cell proliferative response to a proliferation factor. The method includes: (a) contacting a vertebrate cell expressing luciferase and a proliferation factor receptor with a proliferation factor for sufficient time for the proliferation factor to bind to the proliferation factor receptor; (b) culturing the contacted cell expressing luciferase for at least one generation, and (c) measuring the amount of light emission, wherein the luciferase expression is driven from a promoter non-responsive to the proliferation factor and the light emission directly correlates with proliferation factor-mediated cell proliferation. The proliferation factor can be a growth factor, a cytokine or a hormone or an agonist or antagonist thereof. The methods of the invention additionally include determining the effect of an inhibitor of the proliferation factor. Cells used in the method are contacted with a proliferation factor in the presence of a sample suspected of containing an inhibitor of the proliferation factor. The inhibitor can be neutralizing antibody, or binding fragment thereof, to the proliferation factor. The methods of the invention also are applicable as an indicator of cell health or viability. The invention further provides a diagnostic system. The diagnostic system includes a plurality of different vertebrate cell lines each encoding a luciferase gene and a different proliferation factor receptor, the luciferase gene being operationally linked to a promoter non-responsive to a proliferation factor bound by the proliferation factor receptor, wherein light emission from each of the different cell lines being characterized as directly correlating with proliferation factor-mediated cell proliferation.

The invention relates to the technical field of porcine circovirus, in particular to a porcine circovirus 2 (PCV2) immune protection polypeptide, and a vaccine containing the PCV2 immune protection polypeptide. The amino acid sequence of the PCV2 immune protection polypeptide is shown in the sequence table 1-4. According to the vaccine, tests show that after 42-63 days of first immune of a vaccine of P5013 and a vaccine of P1300, the antibody titer and the neutralizing antibody titer of an ELISA antibody are remarkably increased, the lymphocyte proliferative response and IL-4 and IFN-Gamma cytokines are significantly higher than those of a control group, and the antibody level and the cellular immunity level of the vaccine group of P5013 are the highest; mice tests show that PCV2 immune response induced by the synthetic peptide vaccine of P5013 is the highest and the strongest; pig tests find that the synthetic polypeptide vaccine of P5013 can induce pigs to generate a PCV2-specific immune response, can reduce viremia caused by PCV2 virulent virus attack, alleviate the clinical symptoms and pathological lesions of viremia, and has immune protection effect on PCV2.

The invention provides clone, expression and application of BALF4 polypeptide and relates to the technical field of molecular biology. According to the clone, the expression and the application, through gene optimization, an optimized nucleotide sequence encoding the BALF4 polypeptide is obtained, high-expression yeast cells for recombining the BALF4 polypeptide are constructed, a purification method is optimized, and the BALF4 polypeptide is obtained finally. The BALF4 polypeptide provided by the invention can stimulate production of a high-level antigen specific antibody, induces mouse splenic lymphocyte proliferative response, can effectively stimulate a body immune system, has stronger immunogenicity, can be used as an immune adjuvant and is used for improving the prevention effect on an EB virus vaccine so as to reach the purpose of effectively preventing EB virus infection.

The invention provides a preparation method of a human oligodendrocyte precursor cell inhibiting nerve secondary. Specifically, the method includes: constructing a virus expression vector of two glial growth factors, conducting cotransfection of a human oligodendrocyte precursor cell to prepare the human oligodendrocyte precursor cell, which can achieve high expression of the two glial growth factors, i.e. a growth related factor 43 and a glial growth factor 2, give play to the combined action of the two to promote oligodendrocyte repair, and inhibit nerve secondary injury caused by proliferative response and glial scar formation after oligodendrocyte injury. Also, the proliferation and differentiation ability of oligodendrocyte precursor cell itself is also utilized to participate in nerve function repair, and no tumorigenesis exists. The invention also provides a kit for preparation of the human oligodendrocyte precursor cell inhibiting nerve secondary. The human oligodendrocyte precursor cell provided by the invention has very good therapeutic effect on nervous system diseases.

Highly purified and specific glycosaminoglycan degrading enzymes, chondroitinase B and chondroitinase AC, are used to treat fibroproliferative diseases. The enzymatic removal of chondroitin sulfate B(dermatan sulfate), and to a lesser extent, chondroitin sulfate A or C, from cell surfaces effectively decreases growth factor receptors on the cells and thereby decreases the cell proliferative response to such growth factors. In addition, removal of chondroitin sulfates reduces secretion of collagen, one of the major extracellular matrix components. Through the combined inhibition of fibroblast proliferation and collagen synthesis, treatment with chondroitinase B or chondroitinase AC decreases the size of fibrous tissue found in psoriasis, scleroderma, keloids, pulmonary fibrosis and surgical adhesions.

The invention relates to applications of a beta-glucan extract product in the immunological enhancement of poultry animals, and specifically provides a kit. The kit includes as follows: (1) an immune-enhancer used for enhancing the immunity of poultry animals and includes a beta-glucan extract product extracted from saccharomyces cerevisiae cell walls; and (2) a virus vaccine. Applications of thebeta-glucan extract product extracted from the saccharomyces cerevisiae cell walls in the preparation of the kit and immune-enhancer for enhancing the immunity of the poultry animals are also provided. Immunological enhancement can be performed on the poultry animals by using the beta-glucan extracted from the saccharomyces cerevisiae cell walls, so that lymphocyte proliferative response and T cell response of the poultry animals inoculated with the vaccine can be enhanced; viral load can be reduced; pathogenic rates or mortality can be lowered; antibodies can be generated in advance; antibodyproduction can be enhanced; and / or the diffusion of viruses can be restricted.

The invention provides a preparation method of a human oligodendrocyte precursor cell inhibiting nerve secondary. Specifically, the method includes: constructing a virus expression vector of two glial growth factors, conducting cotransfection of a human oligodendrocyte precursor cell to prepare the human oligodendrocyte precursor cell, which can achieve high expression of the two glial growth factors, i.e. a growth related factor 43 and a glial growth factor 2, give play to the combined action of the two to promote oligodendrocyte repair, and inhibit nerve secondary injury caused by proliferative response and glial scar formation after oligodendrocyte injury. Also, the proliferation and differentiation ability of oligodendrocyte precursor cell itself is also utilized to participate in nerve function repair, and no tumorigenesis exists. The invention also provides a kit for preparation of the human oligodendrocyte precursor cell inhibiting nerve secondary. The human oligodendrocyte precursor cell provided by the invention has very good therapeutic effect on nervous system diseases.

Provided herein are methods for testing proliferative responses of a drug on patient-derived tumor cells; the method comprising obtaining cells from biopsy or tumor resection material; culturing the cells on a 3D extracellular matrix (ECM); treating the cells in ECM with a drug; subjecting the treated cells to high-content (HC) imaging; and evaluating the HC imaging of the treated cells; thereby testing the proliferative responses of the drug on the patient-derived tumor cells. In some embodiments, the methods disclosed herein comprise obtaining cells from biopsy or tumor resection material; xenografting the cells into an animal model (patient-derived xenograft; PDX) for tumor formation; and obtaining tumor cells from the animal.

The invention belongs to the technical field of biological detection, and particularly relate to a method for detecting lymphopoiesis by utilizing a medicament cytochalasin B. The principle of the invention is that the medicament cytochalasin B can retard cell division and cannot retard nuclear division, so that cells which are subjected to breeder reaction are treated by the cytochalasin B to form visual binucleated cells; peripheral blood lymphocyte can enable corresponding lymphocyte to be cloned and multiplicated under the stimulation of phytohemagglutinin, and ionizing radiation can inhibit multiplication of lymphocyte; human peripheral blood can be irradiated by a 2Gygamma ray, and the cytochalasin B is added to treat after the stimulation by PHA (phytohemagglutinin), and difference of binuclear rate of radiated and non-radiated lymphocyte is detected; the lymphocyte stimulated by PHA forms binucleated cells, and the binuclear rate of radiated lymphocyte decreases obviously, which shows that the multiplication level of lymphocyte can be reflected well by detecting the binuclear rate of lymphocyte by utilizing the cytochalasin B. The method provided by the invention is visual in detecting indexes, is simple, rapid and economical in operation, and is accurate in result.

GM-CSF administered before immunization exerted a sustained suppressive effect against the induction of myasthenia gravis (MG). This suppression was associated with lowered serum autoantibody levels, reduced T cell proliferative responses to AChR, and an expansion in the population of FoxP3+ regulatory T cells. Manipulating DCs to expand regulatory T cells is useful for the control of autoimmune diseases such as myasthenia gravis MG.

The invention relates to 12 saturated fatty chain alcohol His-Gly-AA tripeptide ester conjugates with immunosuppressive activity in a general formula His-Gly-AA-O-CH2-(CH2)nCH3 I, wherein AA stands for Glu or Lys. In saturated fatty chain alcohol, n is equal to 6, 8, 10, 12, 14 or 16. the invention also relates to a preparation method and application of the conjugates as an immunosuppressant. An experimental result of the saturated fatty chain alcohol His-Gly-AA tripeptide ester which has the inhibition effects of splenic lymphocyte mitogen breeder reaction and macrophage phagocytosis activity indicates that the conjugates of the invention have excellent immunosuppressive action and can be clinically used as an immunosuppressant.

This invention is related to new nitrogenated trans-stilbene compounds, more specifically, imine, pyrrole and indole derivatives, with procedures for the preparation and use thereof as pharmaceutical compositions for the treatment and / or chemoprevention of those mammalian diseases such as cancer, fibrosclerosis and acute / chronic inflammation, graft-versus-host reaction, ischemic-reperfusion tissue injury in stroke and heart attack, neurodegeneration, and during organ transplantation, whose pathogenic and pathophysiological mechanisms depend on or are significantly contributed by undesirable oxidative stress, angiogenic and proliferative responses.

The invention relates to 6 aliphatic chain amine modified carbolinyl carboxylic acid analogs disclosed as general formula I, wherein n is equal to 6, 8, 10, 12, 14 or 16. The invention also relates to a preparation method of the 6 aliphatic chain amine modified carbolinyl carboxylic acid analogs disclosed as general formula I. The invention further relates to a nano structure of the 6 aliphatic chain amine modified carbolinyl carboxylic acid analogs disclosed as general formula I. By researching the inhibiting action of the saturated fatty chain amine modified carbolinyl carboxylic acid analogs on the spleen lymphocyte mitogen breeder reaction and the survival time after transplanting the mouse postotic cardiac muscle, the invention further relates to excellent immunosuppression action of the 6 aliphatic chain amine modified carbolinyl carboxylic acid analogs disclosed as general formula I. The 6 aliphatic chain amine modified carbolinyl carboxylic acid analogs with immunosuppressive activity disclosed as general formula I have wide application prospects in preparing immunosuppressive drugs.