title: Increased numbers of spleen colony forming units in B cell deficient CBA/N mice.
abstract: The formation of exogenous and endogenous spleen colonies was studied in immune-defective mice expressing the CBA/N X-linked xid gene. Bone marrow and spleen cells of immune deficient mice formed increased numbers of eight-day exogenous spleen colonies when transferred to either normal or B cell deficient lethally irradiated recipients. Moreover, defective mice showed increased formation of five-day endogenous spleen colonies (derived from transient endogenous colony forming units; T-CFU) and of ten-day endogenous spleen colonies (derived from CFU-S). Among the possible mechanisms responsible for the observed effects, the most probable appears the one in which decreased numbers of B cell precursors stimulate stem cell pools through a feedback mechanism.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D001854:Bone Marrow Cells; D005260:Female; D007153:Immunologic Deficiency Syndromes / Q000276:immunology*; D008297:Male; D051379:Mice; D008808:Mice, Inbred CBA / Q000235:genetics / Q000276:immunology*; D013154:Spleen / Q000166:cytology*; D013234:Stem Cells / Q000276:immunology*; D014960:X Chromosome