Erschienen in:
01.07.2014
The Long Elusive IgM Fc Receptor, FcμR
verfasst von:
Hiromi Kubagawa, Satoshi Oka, Yoshiki Kubagawa, Ikuko Torii, Eiji Takayama, Dong-Won Kang, Dewitt Jones, Naonori Nishida, Toshio Miyawaki, Luigi F. Bertoli, Sheila K. Sanders, Kazuhito Honjo
Erschienen in:
Journal of Clinical Immunology
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Sonderheft 1/2014
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Abstract
IgM exists as both a monomer on the surface of B cells and a pentamer secreted by plasma cells. Both pre-immune “natural” and antigen-induced “immune” IgM antibodies are important for protective immunity and for immune regulation of autoimmune processes by recognizing pathogens and self-antigens. Effector proteins interacting with the Fc portion of IgM, such as complement and complement receptors, have thus far been proposed but fail to fully account for the IgM-mediated protection and regulation. A major reason for this deficit in our understanding of IgM function seems to be lack of data on a long elusive Fc receptor for IgM (FcμR). We have recently identified a bona fide FcμR in both humans and mice. In this article we briefly review what we have learned so far about FcμR.