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Hardy RR, Carmack CE, Li YS, Hayakawa K
Distinctive Developmental Origins and Specificities of Murine Cd5(+)B Cells
Immunological Reviews (1994) 137:91-118.
Abstract
CD5(+) B cells constitute a small fraction of cells in the spleen of adult mice that exhibit numerous features serving to distinguish them from the bulk of IgD(++)CD5(-) ''conventional'' B cells. In this review we focus on two major questions relating to this population: 1) the relationship of CD5(+) B cells to other B cells; and 2) the distinctive enrichment of particular autoreactive specificities in this subset. The nature of their origins is clarified by a thorough analysis of intermediate stages of early B-cell development in both fetal and adult tissues. The reactivity to bromelain- treated mouse red blood cells serves as a prototype system for the investigation of biased specificities in CD5(+) B cells. These lines of investigation lead us to propose that CD5(+) B cells in the adult are the remnant of a distinct fetal B-cell differentiation pathway wherein selection of cells from this fetal/neonatal population into the adult long-lived pool results in the overexpression of certain germline-encoded autoreactivities.
Note
Publication Date: 1994-02-01.
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