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

Attila Végh, Anita Farkas, Dorottya Kövesdi, Krisztián Papp, Judit Cervenak, Zita Schneider, Balázs Bender, László Hiripi, Glória László, József Prechl, János Matkó, Imre Kacskovics

Research output: Contribution to journalArticle

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 bias towards immunodominant epitopes of ovalbumin, which was used in this study as a model antigen. These results are also in line with our previous reports describing a substantial increase in the levels of Ag-specific IgG in FcRn Tg mice immunized with Ags that are weakly immunogenic and, therefore, not affected by immunodominance.

Original languageEnglish
JournalPLoS One
Volume7
Issue number4
Publication statusPublished - 2012
Externally publishedYes

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Antibody Diversity
Transgenic Mice
Immunoglobulin G
immune response
genetically modified organisms
antibodies
Antibodies
Macrophages
cattle
mice
dendritic cells
Dendritic Cells
Immunodominant Epitopes
Humoral Immunity
humoral immunity
Ovalbumin
Antigen-Antibody Complex
macrophages
Immunoglobulin M
Bone

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Cite this

FcRn overexpression in transgenic mice results in augmented APC activity and robust immune response with increased diversity of induced antibodies. / Végh, Attila; Farkas, Anita; Kövesdi, Dorottya; Papp, Krisztián; Cervenak, Judit; Schneider, Zita; Bender, Balázs; Hiripi, László; László, Glória; Prechl, József; Matkó, János; Kacskovics, Imre.

In: PLoS One, Vol. 7, No. 4, 2012.

Research output: Contribution to journalArticle

Végh, A, Farkas, A, Kövesdi, D, Papp, K, Cervenak, J, Schneider, Z, Bender, B, Hiripi, L, László, G, Prechl, J, Matkó, J & Kacskovics, I 2012, 'FcRn overexpression in transgenic mice results in augmented APC activity and robust immune response with increased diversity of induced antibodies.', PLoS One, vol. 7, no. 4.
Végh, Attila ; Farkas, Anita ; Kövesdi, Dorottya ; Papp, Krisztián ; Cervenak, Judit ; Schneider, Zita ; Bender, Balázs ; Hiripi, László ; László, Glória ; Prechl, József ; Matkó, János ; Kacskovics, Imre. / FcRn overexpression in transgenic mice results in augmented APC activity and robust immune response with increased diversity of induced antibodies. In: PLoS One. 2012 ; Vol. 7, No. 4.
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AU - Papp, Krisztián

AU - Cervenak, Judit

AU - Schneider, Zita

AU - Bender, Balázs

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