FcRn overexpression in transgenic mice results in augmented APC activity and robust immune response with increased diversity of induced antibodies.

PloS One
Attila VéghImre Kacskovics

Abstract

Our previous studies have shown that overexpression of bovine FcRn (bFcRn) in transgenic (Tg) mice leads to an increase in the humoral immune response, characterized by larger numbers of Ag-specific B cells and other immune cells in secondary lymphoid organs and higher levels of circulating Ag-specific antibodies (Abs). To gain additional insights into the mechanisms underlying this increase in humoral immune response, we further characterized the bFcRn Tg mice. Our Western blot analysis showed strong expression of the bFcRn transgene in peritoneal macrophages and bone marrow derived dendritic cells; and a quantitative PCR analysis demonstrated that the expression ratios of the bFcRn to mFcRn were 2.6- and 10-fold in these cells, respectively. We also found that overexpression of bFcRn enhances the phagocytosis of Ag-IgG immune complexes (ICs) by both macrophages and dendritic cells and significantly improves Ag presentation by dendritic cells. Finally, we determined that immunized bFcRn mice produce a much greater diversity of Ag-specific IgM, whereas only the levels, but not the diversity, of IgG is increased by overexpression of bFcRn. We suggest that the increase in diversity of IgG in Tg mice is prevented by a selective bi...Continue Reading

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Citations

Oct 24, 2013·BioDrugs : Clinical Immunotherapeutics, Biopharmaceuticals and Gene Therapy·Gabriele ProetzelDerry C Roopenian
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Sep 26, 2020·Frontiers in Immunology·Bence SzikoraImre Kacskovics
Apr 14, 2017·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Sari LatvalaSven Kronenberg

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Methods Mentioned

BETA
transgenic
flow cytometry
ELISA
Protein Assay
electrophoresis
PCR
flow
confocal microscopy
FACS

Software Mentioned

GenePix
RotorGene
FACSDiva

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