title: Anti-immunoglobulin in combination with cytochalasin stimulates proliferation of murine B lymphocytes.
abstract: The ability of cytochalasin to influence the stimulation of murine B lymphocytes through surface immunoglobulin was assessed during short term cultures. Modest doses of anti-immunoglobulin alone did not stimulate proliferation of mouse spleen cells at 2 days. Cytochalasin B alone also had no effect. However, anti-immunoglobulin in combination with cytochalasin B stimulated substantial proliferation as judged by [3H]thymidine incorporation. Cytochalasins A, E, and D, and dihydrocytochalasin B were all effective in promoting B cell proliferation. Spleen cells from xid-defective (CBA/N X DBA/2)F1 male mice failed to proliferate in response to anti-immunoglobulin plus cytochalasin, suggesting that this treatment affects the same subset of B cells as anti-immunoglobulin plus B cell growth factor. Moreover, proliferation that was stimulated by anti-immunoglobulin plus cytochalasin B was not affected by T cell depletion. Cytochalasin may circumvent the need for, or replace, a second signal for proliferation.
mesh_terms: D000818:Animals; D000888:Antibodies, Anti-Idiotypic / Q000502:physiology*; D001402:B-Lymphocytes / Q000276:immunology*; D003571:Cytochalasin B / Q000031:analogs & derivatives / Q000494:pharmacology*; D006041:Goats / Q000276:immunology; D007153:Immunologic Deficiency Syndromes / Q000276:immunology; D008213:Lymphocyte Activation / Q000187:drug effects; D051379:Mice; D008805:Mice, Inbred A; D013154:Spleen / Q000166:cytology; D013601:T-Lymphocytes
chemical_list: D000888:Antibodies, Anti-Idiotypic; C024794:dihydrocytochalasin B; D003571:Cytochalasin B