31 results about "Proliferative response" patented technology

The present invention discloses the use of the non-toxic cell-binding B subunit of CT (CTB), and holotoxin CT that is devoid of ADP-ribosylating activity, as adjuvants for enhancing transcutaneous immune response to a co-administered protein allergen. It was found that topical administration of CTB to mice induced serum antibody response against itself comparable to those evoked by CT, but was inefficient at promoting systemic antibody responses against an admixed prototype protein allergen. To the contrary co-administration of either CT or CTB with allergen led to vigorous antigen-specific T cell proliferative responses in lymph nodes draining the cutaneous site of administration and at distant systemic sites. Consistent with these observations, it was found that CTB selectively potentiated Th1-driven responses without affecting Th2-dependent responses. Cutaneously applied CT enhanced serum IgE responses to a co-administered allergen, while CTB partially suppressed epicutaneously induced IgE responses to the same allergen.

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.

Peptides having at least nine amino acid residues each including an amino acid sequence which corresponds to position p200-208 or p262-266 of the human acetylcholine receptor alpha -subunit, but differing therefrom by one or more amino acid substitutions, are disclosed. These peptides inhibit the proliferative response of human peripheral blood lymphocytes to the myasthenogenic peptides p195-212 and p259-271 and are suitable for treatment of subjects afflicted with myasthenia gravis.

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.

The invention relates to 6 saturated fatty chain alcohol Glu-Asp-Gly tripeptide ester conjugates with immunosuppressive activity in a general formula Glu-Asp-Gly-O-CH2-(CH2)nCH3 I. 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 Glu-Asp-Gly tripeptide ester 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.

The invention relates to conjugates of saturated aliphatic chain alcohol, dexamethasone, and Glu-Asp-Gly, preparation, a nano structure, and applications thereof. The invention discloses 6 saturated aliphatic chain alcohol modified dexamethasone-Glu-Asp-Gly conjugates represented by the formula 10 a-f, wherein in the formula the n represents 7, 9, 11, 13, 15, or 17. The invention also discloses a preparation method, a nano structure, immunity inhibition activity, inflammation inhibition activity, and pain relieving activity of the conjugates. The invention also finds that the conjugates do not have any side effect leading to osteoporosis. The researches on the inhibition effect of the conjugates on splenic lymphocyte mitogen proliferation reactions and the survival time after mouse retroauricular cardiac muscle transplant show that the conjugates have an excellent immunity inhibition effect. The researches on the effect of the conjugates on the swelling degree of mouse ears which are inflamed due to xylene show that the conjugates have an excellent anti-inflammation effect. The researches on the effect of the conjugates on mouse heat radiation tail flick time show that the conjugates have an excellent pain-relieving effect. The researches on the effect of the conjugates on the mouse thigh bones show that the conjugates cannot cause osteoporosis. So the conjugates have a wide application prospect in the preparation of immunity inhibition drugs.

The invention provides an antigen-antibody complex for preventing and / or treating avian influenza, which comprises inactivation avian influenza totiviruses which are used as antigen and an immune body thereof, and the mass concentration ratio of the antigen and the immune body is more than 1. After entering organisms to perform initial immunization, the antigen-antibody complex stimulates the organisms again to induce immunoreaction, and immune response is quick in speed and strong in reaction; the antigen-antibody complex used as a carrier is more favorable for capturing and presenting antigen presenting cells and can also strengthen a breeder reaction of T cells effectively; purified totiviruses used as the antigen increase the molecular weight of the complex, are more favorable for ingestion of immunocyte of the organisms on the antigen, cause the more extensive immunoreaction quickly, and have a significance for preventing avian influenza viruses of which the antigen is easy for variation. A preparation of the antigen-antibody complex does not need to use solid carriers, does not cause intense stimulus on the organisms or initiates the organisms to generate an adverse reaction, and is simple to prepare and safe and convenient to use.

The invention relates to conjugates of saturated aliphatic chain alcohol, dexamethasone, and His-Gly-Glu, preparation, a nano structure, and applications thereof. The invention discloses 6 saturated aliphatic chain alcohol modified dexamethasone-His-Gly-Glu conjugates represented by the formula 10 a-f, wherein in the formula the n represents 7, 9, 11, 13, 15, or 17. The invention also discloses a preparation method, a nano structure, immunity inhibition activity, inflammation inhibition activity, and pain relieving activity of the conjugates. The invention also finds that the conjugates do not have any side effect leading to osteoporosis. The researches on the inhibition effect of the conjugates on splenic lymphocyte mitogen proliferation reactions and the survival time after mouse retroauricular cardiac muscle transplant show that the conjugates have an excellent immunity inhibition effect. The researches on the effect of the conjugates on the swelling degree of mouse ears which are inflamed due to xylene show that the conjugates have an excellent anti-inflammation effect. The researches on the effect of the conjugates on mouse heat radiation tail flick time show that the conjugates have an excellent pain-relieving effect. The researches on the effect of the conjugates on the mouse thigh bones show that the conjugates cannot cause osteoporosis. So the conjugates have a wide application prospect in the preparation of immunity inhibition drugs.

This invention is related to new nitrogenated trans-stilbene analog compounds, more specifically, imine, pyrrol 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 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 development of graft versus host disease in a mammalian patient undergoing cell transplantation therapy for treatment of a bone marrow mediated disease, is prevented or alleviated by subjecting at least the T-cells of the allogeneic cell transplantation composition, extracorporeally, to oxidative stress, in appropriate dosage amounts, such as bubbling a gaseous mixture of ozone and oxygen through a suspension of the T-cells. The process may also include irradiation of the cells with UV light, simultaneously with the application of the oxidative stress. The oxidative stress induces reduced inflammatory cytokine production and a reduced proliferative response in the T-cells.

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.

Disclosed are cDNAs and genomic DNAs encoding protease-activated receptor 3 (PAR3) from mouse and human, and the recombinant polypeptides expressed from such cDNAs. The recombinant receptor polypeptides, receptor fragments and analogs expressed on the surface of cells are used in methods of screening candidate compounds for their ability to act as agonists or antagonists to the effects of interaction between thrombin and PAR3. Agonists are used as therapeutics to treat wounds, thrombosis, atherosclerosis, restenosis, inflammation, and other thrombin-activated disorders. Antagonists are used as therapeutics to control blood coagulation and thereby treating heart attack and stroke. Antagonists mediate inflammatory and proliferative responses to injury as occur in normal wound healing and variety of diseases including atherosclerosis, restenosis, pulmonary inflammation (ARDS) and glomerulosclerosis. Antibodies specific for a protease-activated receptor 3 (or receptor fragment or analog) and their use as a therapeutic are also disclosed.

Methods are provided for the treatment of allergic and other immune disorders associated with overproduction of Th2 type cytokines by antigen specific T cells. Immunotherapy with adjuvants, as provided in the present invention, greatly inhibits the development of airway hyperreactivity and airway inflammation. Such immunotherapy is shown to reverse ongoing airway disease, and convert allergic inflammatory responses into protective immune responses. Conditions of particular interest include allergic conditions associated with production of Th2 cytokines and / or IgE antibodies, asthma, allergic rhinitis, and anaphylactic reactions. The addition of adjuvant induces a Th1-type immune response and can redirect an established Th2-type response to a Th1-type response for the selected antigen. Preferably, antigen-specific IgE production is reduced without altering the intensity of the antigen-specific proliferative response. One particularly preferred adjuvant for use in accordance with the present invention is a Listeria adjuvant.

The development of graft versus host disease in a mammalian patient undergoing cell transplantation therapy for treatment of a bone marrow mediated disease, is prevented or alleviated by subjecting at lest the T-cells of the allogeneic cell transplantation composition, in admixture with red blood cells of the donor, extracorporeally, to oxidative stress, in appropriate dosage amounts, such as bubbling a gaseous mixture of ozone and oxygen through a suspension of the T-cells. The process may also include irradiation of the cells with UV light, simultaneously with the application of the oxidative stress. The oxidative stress induces reduced inflammatory cytokine production and a reduced proliferative response in the T-cells.

Methods for the treatment of short bowel syndrome in patients in need thereof are provided, comprising the administration to the patients of an effective amount of a formulation comprising arachidonic acid and docosahexanoic acid.

The invention relates to use of a 3D cell culture technology in an in-vitro drug test method, and more particularly to a method for testing a proliferative response of a drug to tumor cell derived from a patient, which can reliably screen the candidate drugs by predictive proliferation assay for efficacy and / or mechanism of action. The method comprises the steps of: (1) obtaining cells from a biopsy or tumor resection material; (2) culturing the obtained cells on a 3D extracellular matrix; (3) treating the tumor cells cultured on the 3D extracellular matrix with drug treatment; (4) performinghigh-content imaging on the processed tumor cells; and (5) evaluating the high-content imaging of the processed tumor cells, and testing the proliferative response of the drug to the tumor cells derived from the patient.

The invention provides a DC cell preparation method for improving antigen presenting T cells and improving T cell killing efficiency and application thereof. A tumor antigen modified by 4-phenyl isothiocyanate alpha-D-mannopyranoside glycosylation is loaded on a DC cell, SDF-1 and IL-8 chemotactic factors are added, the DC cell is chemotactic, more mature DCs are obtained, interaction between the DC and T cell is enhanced, T cell activation is further promoted, a gene expression silencing agent shRNA is introduced into the DC cell, an IDO gene is silenced, the surface antigen of the DC is obviously increased, and the proliferation reaction of T lymphocytes is enhanced and stimulated; after the DC cells and the T cells are subjected to mixed culture, the pH value is adjusted, and the DC cells and the T cells are cultured in a weak acid environment, so that the antigen presentation efficiency of the DC cells and the T cells is improved. The result shows that the antigen presentation efficiency between the DC cells and the T cells is higher, and the T cells with higher antigen specificity and higher killing efficiency can be obtained through stimulation.

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.

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 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.