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The immune response in steroid deficient mice.

Adrenalectomy, gonadectomy and combined adrenalectomy—gonadectomy resulted in increased spleen weights, spleen cell counts and 19S plaque-forming cells following primary and secondary immunization of mice with SRBC when compared to controls. Plaque-forming cells of the 7S type in the spleen did not increase when measured on the eleventh day following the primary or the third day following secondary sensitization. Combined adrenalectomy—gonadectomy had a greater effect on spleen cell counts, spleen weights and plaque-forming cells in the primary and secondary response than either operation alone. Haemolysin titres were not significantly different between test and sham operated animals in the primary and secondary responses. 
 
In the primary responses, it appears that the increase in spleen weight and cell count is responsible for the increase in 19S plaque-forming cells. The response to a second injection of SRBC demonstrated that 19S antibody-producing cells increased three-fold in steroid depleted mice above the control values. In the test animals the 19S antibody-producing cells of the spleen were relatively enriched above that of the controls.