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Mouse model recapitulating human Fcγ receptor structural and functional diversity
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Mouse model recapitulating human Fcγ receptor structural and functional diversity
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Journal Article
Mouse model recapitulating human Fcγ receptor structural and functional diversity
2012
Overview
The in vivo biological activities of IgG antibodies result from their bifunctional nature, in which antigen recognition by the Fab is coupled to the effector and immunomodulatory diversity found in the Fc domain. This diversity, resulting from both amino acid and glycan heterogeneity, is translated into cellular responses through Fcγ receptors (FcγRs), a structurally and functionally diverse family of cell surface receptors found throughout the immune system. Although many of the overall features of this system are maintained throughout mammalian evolution, species diversity has precluded direct analysis of human antibodies in animal species, and, thus, detailed investigations into the unique features of the human IgG antibodies and their FcγRs have been limited. We now report the development of a mouse model in which all murine FcγRs have been deleted and human FcγRs, encoded as transgenes, have been inserted into the mouse genome resulting in recapitulation of the unique profile of human FcγR expression. These human FcγRs are shown to function to mediate the immunomodulatory, inflammatory, and cytotoxic activities of human IgG antibodies and Fc engineered variants and provide a platform for the detailed mechanistic analysis of therapeutic and pathogenic IgG antibodies.
Publisher
National Academy of Sciences,National Acad Sciences
Subject
/ Animals
/ Antibodies, Monoclonal - immunology
/ antigens
/ CD4-Positive T-Lymphocytes - immunology
/ CD4-Positive T-Lymphocytes - metabolism
/ CD8-Positive T-Lymphocytes - immunology
/ CD8-Positive T-Lymphocytes - metabolism
/ Electrophoresis, Polyacrylamide Gel
/ Female
/ Genetic Variation - immunology
/ genetics
/ Humans
/ Immunoglobulin G - immunology
/ Immunoglobulin G - metabolism
/ Male
/ Melanoma, Experimental - genetics
/ Melanoma, Experimental - immunology
/ Melanoma, Experimental - pathology
/ Mice
/ Protein Isoforms - immunology
