The effect of adult splenectomy on the expression of suppressor and amplifier T cell activity was examined with respect to the serum antibody response to Type III pneumococcal polysaccharide (SSS-III) by using a sensitive radioimmunoassay. Suppressor T cell activity, as measured by the degree of low-dose paralysis induced, was not impaired in the least by splenectomy; however, amplifier T cell activity was almost completely eliminated within 7 days after splenectomy. These findings indicate that suppressor T cell activity is not confined solely to the spleen, the major site of antibody synthesis after immunization with SSS-III, and that the spleen may be an important site for the generation and/or maintenance of amplifier T cell activity.

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