| Literature DB >> 20930418 |
Akiko Ishii-Watabe1, Yoshiro Saito, Takuo Suzuki, Minoru Tada, Maho Ukaji, Keiko Maekawa, Kouichi Kurose, Nahoko Kaniwa, Jun-ichi Sawada, Nana Kawasaki, Teruhide Yamaguchi, Takako Eguchi Nakajima, Ken Kato, Yasuhide Yamada, Yasuhiro Shimada, Teruhiko Yoshida, Takashi Ura, Miyuki Saito, Kei Muro, Toshihiko Doi, Nozomu Fuse, Takayuki Yoshino, Atsushi Ohtsu, Nagahiro Saijo, Tetsuya Hamaguchi, Haruhiro Okuda, Yasuhiro Matsumura.
Abstract
Neonatal Fc receptor (FcRn) plays an important role in regulating IgG homeostasis in the body. Changes in FcRn expression levels or activity caused by genetic polymorphisms of FCGRT, which encodes FcRn, may lead to interindividual differences in pharmacokinetics of therapeutic antibodies. In this study, we sequenced the 5'-flanking region, all exons and their flanking regions of FCGRT from 126 Japanese subjects. Thirty-three genetic variations, including 17 novel ones, were found. Of these, two novel non-synonymous variations, 629G>A (R210Q) and 889T>A (S297T), were found as heterozygous variations. We next assessed the functional significance of the two novel non-synonymous variations by expressing wild-type and variant proteins in HeLa cells. Both variant proteins showed similar intracellular localization as well as antibody recycling efficiencies. These results suggested that at least no common functional polymorphic site with amino acid change was present in the FCGRT of our Japanese population.Entities:
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Year: 2010 PMID： 20930418 DOI： 10.2133/dmpk.dmpk-10-rg-067
Source DB: PubMed Journal: Drug Metab Pharmacokinet ISSN： 1347-4367 Impact factor: 3.614