Anti-Immunoglobulin Stimulation of Murine Lymphocytes

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Abstract
The in vitro proliferative response of normal mouse spleen cells to anti-immunoglobulin (Anti-Ig) reagents was found to be an age-associated phenomenon. The response usually appears in mice when they reach 5 to 7 months of age and is rarely seen in younger animals. Anti-Ig induced proliferation was observed by using two different antisera—one polyvalent, prepared against mouse antibody-antigen complexes and one prepared against mouse IgM myeloma. Both antisera were shown to be specific for B cells by cytotoxicity and immunofluorescent staining. Glassbead separation of spleen cells showed that the anti-Ig-induced proliferation was a B cell response.

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