title: Functional heterogeneity of splenic T lymphocyte subpopulations. I. Determination of splenic subpopulations by the use of mitogneic probes.
abstract: The results reported here suggest that there exist two T-cell-mitogenic responsive populations in the spleen--one that is responsive to concanavalin A (Con A) and a second one that is responsive to Con A and phytohemagglutinin (PHA). Using an in vitro restimulation system, we have found that a primary in vivo activation with Con A effectively suppresses the subsequent restimulation response to PHA. However, in the reverse experiment, a primary in vivo PHA activation had little effect on the ability of cells to be restimulated with Con A. The suppression seen was due to a refractory recovery period displayed by all cells after previous activation and not to a nonspecific steric hindrance of mitogenic activation receptors due to the lectin remaining on the cell surfaces.
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D003208:Concanavalin A / Q000494:pharmacology*; D004247:DNA / Q000096:biosynthesis; D005260:Female; D037102:Lectins / Q000494:pharmacology*; D008213:Lymphocyte Activation / Q000187:drug effects*; D008297:Male; D051379:Mice; D013154:Spleen / Q000166:cytology*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D037102:Lectins; D003208:Concanavalin A; D004247:DNA