title: Specific mitogenic activity of 8-Br-guanosine 3',5'-monophosphate (Br-cyclic GMP) on B lymphocytes.
abstract: 8-Br-cyclic GMP has been found to be a specific B cell mitogen; it triggers athymic nude mice spleen cells and "B mice" spleen cells, nylon adherent, anti-theta and complement-treated cells to proliferate. It does not stimulate thymocytes or purified T cells. The kinetics of the response to Br-cyclic GMP and LPS are almost identical. The mitogenic effect of LPS and Br-cyclic GMP is additive when the two mitogens are given together to cells. Spleen cells (C3H/HeJ strain) that did not respond to LPS were triggered by Br-cyclic GMP to make DNA. In order to achieve maximal stimulation by Br-cyclic GMP, the drug had to be in contact with the cells for more than 24 hr. Br-cyclic GMP was found to be mitogenic for spleen cells from five different mouse strains, but not for human leukocytes. DB-cyclic AMP was found to inhibit the DNA synthesis of T lymphocytes after they interacted with Con A; DB-cyclic AMP had no effect on the ability of the B lymphocytes to be transformed by LPS. The differential effects of cyclic nucleotides on B vs. T lymphocytes are discussed.
mesh_terms: D000818:Animals; D001665:Binding Sites / Q000187:drug effects; D002478:Cells, Cultured; D003208:Concanavalin A / Q000494:pharmacology; D000242:Cyclic AMP / Q000494:pharmacology; D006152:Cyclic GMP / Q000494:pharmacology*; D004247:DNA / Q000378:metabolism; D005260:Female; D007106:Immune Sera / Q000302:isolation & purification; D037102:Lectins / Q000494:pharmacology; D008070:Lipopolysaccharides / Q000494:pharmacology; D008213:Lymphocyte Activation / Q000187:drug effects*; D008214:Lymphocytes / Q000378:metabolism; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D008819:Mice, Nude; D008934:Mitogens / Q000494:pharmacology*; D013601:T-Lymphocytes / Q000187:drug effects; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors; D014316:Tritium
chemical_list: D007106:Immune Sera; D037102:Lectins; D008070:Lipopolysaccharides; D008934:Mitogens; D014316:Tritium; D003208:Concanavalin A; D004247:DNA; D000242:Cyclic AMP; D006152:Cyclic GMP; D013936:Thymidine