title: Evidence for a mature B cell subpopulation in Peyer's patches of young adult xid mice.
abstract: Peyer's patch (PP) and mesenteric lymph node (MLN) cell cultures from young adult X-linked immunodeficient (xid) CBA/N and (CBA/N X DBA/2) F1 male mice support primary anti-sheep erythrocyte (SRBC) plaque-forming cell (PFC) responses, which suggests that gut-associated lymphoreticular tissue (GALT) contains a normal B lymphocyte subpopulation. Further support for this was provided by the observation that PP cells from xid mice gave responses to both TI-1 and TI-2 antigens that were similar to the responses of PP cell cultures from normal mice. Spleen cell cultures from xid mice were unresponsive to SRBC and TI-2 antigens. Proof that GALT of xid mice contain mature B lymphocytes was provided by the demonstration of PP B cells that bear a low density of surface immunoglobulin M. When these cells were separated by flow cytometry and immunized with trinitrophenyl (TNP)-Ficoll in vitro, good anti-TNP PFC responses were observed. These results suggest that GALT of young adult xid mice contain mature B cells and may represent the origin for the mature B cell responses seen in aged xid mice.
mesh_terms: D000375:Aging; D000818:Animals; D001402:B-Lymphocytes / Q000145:classification / Q000276:immunology*; D002478:Cells, Cultured; D005260:Female; D007075:Immunoglobulin M / Q000096:biosynthesis; D008198:Lymph Nodes / Q000166:cytology; D008213:Lymphocyte Activation; D008221:Lymphoid Tissue / Q000166:cytology*; D008297:Male; D051379:Mice; D008808:Mice, Inbred CBA; D008811:Mice, Inbred DBA; D010581:Peyer's Patches / Q000166:cytology*; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D007075:Immunoglobulin M; D014301:Trinitrobenzenes