Document Type


Publication Date

February 2008


This article has been peer reviewed. It is the final version as published in Blood 111(3):971-972, February 2008, DOI:10.1182/blood-2007-09-113373. Copyright © 2008 by American Society of Hematology.


The Fcγ receptors contribute to the susceptibility to autoimmune diseases such as ITP in several ways: (1) they modulate dendritic cell antigen processing and presentation, (2) they modulate antibody production by B cells, and (3) they participate in effector cell functions, such as phagocytosis, antibody-dependent cellular cytotoxicity, and mediator release. The key finding in recent years has been the appreciation that the activating Fcγ receptors, encoded by FCGR2A, -2C, -3A, and -3B, compete with the inhibitory Fcγ receptor, encoded by FCGR2B, to determine cellular responses to immune complexes and antibody-coated cells.