Abstract：
:Fc gammaRIIB is an inhibitory receptor that terminates activation signals initiated by antigen cross-linking of the BCR through the recruitment of SHIP. Fc gammaRIIB can also signal independently of BCR coligation to directly mediate an apoptotic response, requiring only an intact transmembrane domain. Failure to recruit SHIP, either by deletion of SHIP or mutation of Fc gammaRIIB, results in enhanced Fc gammaRIIB-triggered apoptosis. Thus, in the germinal center, where ICs are retained by FDCs, Fc gammaRIIB may be an active determinant in the negative selection of B cells whose BCRs have reduced affinity for antigen as a result of somatic hypermutation. Selection of B cells may represent the sum of opposing signals generated by the interaction of ICs with the BCR and Fc gammaRIIB through pathways modulated by SHIP.
journal_name
Immunityjournal_title
Immunityauthors
Pearse RN,Kawabe T,Bolland S,Guinamard R,Kurosaki T,Ravetch JVdoi
10.1016/s1074-7613(00)80074-6keywords:
subject
Has Abstractpub_date
1999-06-01 00:00:00pages
753-60issue
6eissn
1074-7613issn
1097-4180pii
S1074-7613(00)80074-6journal_volume
10pub_type
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