摘要:
The present invention provides an expression vector encoding monospecific or bispecific fusion protein. In one embodiment the expression vector encodes a monospecific fusion protein, which vector comprises a recombinant monospecific single chain cassette comprising a DNA sequence encoding a first binding domain capable of binding a cell surface antigen. In another embodiment the expression vector encodes a bispecific fusion protein, which vector comprises a recombinant bispecific single chain cassette comprising a DNA sequence encoding a first binding domain capable of binding a cell surface antigen and a DNA sequence encoding a second binding domain capable of binding a cell surface antigen, each domain capable of binding a different antigen. The present invention also provides a method for producing a biologically active monospecific or bispecific fusion protein in a mammalian cell. This method comprises: (a) transfecting the mammalian cell with the recombinant expression vector of the invention; (b) culturing the mammalian cell so transfected in step (a); and (c) recovering the biologically active bispecific fusion protein so as produced by the cultured mammalian cell.
摘要:
The present invention provides an expression vector encoding monospecific or bispecific fusion protein. In one embodiment the expression vector encodes a monospecific fusion protein, which vector comprises a recombinant monospecific single chain cassette comprising a DNA sequence encoding a first binding domain capable of binding a cell surface antigen. In another embodiment the expression vector encodes a bispecific fusion protein, which vector comprises a recombinant bispecific single chain cassette comprising a DNA sequence encoding a first binding domain capable of binding a cell surface antigen and a DNA sequence encoding a second binding domain capable of binding a cell surface antigen, each domain capable of binding a different antigen. The present invention also provides a method for producing a biologically active monospecific or bispecific fusion protein in a mammalian cell.
摘要:
The present invention provides an expression vector encoding monospecific or bispecific fusion protein. In one embodiment the expression vector encodes a monospecific fusion protein, which vector comprises a recombinant monospecific single chain cassette comprising a DNA sequence encoding a first binding domain capable of binding a cell surface antigen.
摘要:
An anti-CD2 monoclonal antibody according to the present invention can be: (1) a chimeric monoclonal antibody CD2 SFv-Ig produced by expression of the construct cloned in recombinant Escherichia coli culture ATCC No. 69277; (2) a monoclonal antibody having complementarity-determining regions identical with those of CD2 SFv-Ig; or (3) a monoclonal antibody competing with CD2 SFv-Ig for binding to CD2 antigen at least about 80% as effectively on a molar basis as CD2 SFv-Ig. Anti-CD2 monoclonal antibodies according to the present invention, as well as other antibodies that can modulate the interactions between T lymphocytes and monocytes, can be used to inhibit the production of HIV-1 by HIV-1-infected T cells in HIV-1-infected patients. In another use, T cells treated in vitro can be reinfused into AIDS patients to increase the proportion of functional, non-HIV-1-producing T cells in the patient.
摘要:
An anti-CD2 monoclonal antibody according to the present invention can be: (1) a chimeric monoclonal antibody CD2 SFv-Ig produced by expression of the construct cloned in recombinant Escherichia coli culture ATCC No. 69277; (2) a monoclonal antibody having complementarity-determining regions identical with those of CD2 SFv-Ig; or (3) a monoclonal antibody competing with CD2 SFv-Ig for binding to CD2 antigen at least about 80% as effectively on a molar basis as CD2 SFv-Ig. Anti-CD2 monoclonal antibodies according to the present invention, as well as other antibodies that can modulate the interactions between T lymphocytes and monocytes, can be used to inhibit the production of HIV-1 by HIV-1-infected T cells in HIV-1-infected patients. In another use, T cells treated in vitro can be reinfused into AIDS patients to increase the proportion of functional, non-HIV-1-producing T cells in the patient.
摘要:
Mixed specificity fusion proteins capable of binding to cellular adhesion molecules have been produced. The fusion proteins contain a polypeptide region, such as an IgG constant region, operatively attached to at least two binding regions each of which corresponds to either an extracellular domain of a cell surface receptor for cellular adhesion molecules, or a variable region of an antibody directed to a cellular adhesion molecule. A method of inhibiting inflammation is a patient is disclosed in which the present fusion proteins are administered to a patient to inhibit the attachment of inflammatory cells to vascular endothelium. A method of inhibiting metastasis is disclosed in which the present fusion proteins are administered to a patient to inhibit the metastasis of responsive tumor cells.
摘要:
The invention identifies the CTLA4 receptor as a ligand for the B7 antigen. The complete amino acid sequence encoding human CTLA4 receptor gene is provided. Methods are provided for expressing CTLA4 as an immunoglobulin fusion protein, for preparing hybrid CTLA4 fusion proteins including CTLA4/CD28 chimeric proteins, and for using the soluble fusion proteins, fragments and derivatives thereof, including monoclonal antibodies reactive with B7 and CTLA4, to regulate T cell interactions and immune responses mediated by such interactions.
摘要:
The present invention relates to novel antibody heteroconjugates and bispecific antibodies and methods and compositions and their use in the enhancement or inhibition of activation and function of T or B lymphocytes. The heteroconjugates are comprised of at least two antibody molecules cross-linked to each other, each molecule being reactive with a different lymphocyte antigen on the same cell. The invention also provides bispecific antibodies comprising a first binding region reactive with an antigen on a lymphocyte and a second binding region reactive with a different antigen on the lymphocyte. The heteroconjugates, bispecific antibodies, methods and compositions of this invention are therefore useful in the regulation of lymphocyte function, resulting in the improvement of cellular immune responses in various disease states.