Abstract
Summary and Conclusions
Cortisone administration combined with administration of antigen in small doses intravenously causes significant and substantial decrease in circulating complement. Cortisone alone produces a hardly discernible effect. ACTH with or without simultaneous antigen administration has no apparent depressant action on complement. Growth hormone administered with or without simultaneous immunization produces a striking rise in the complement level. Evidence is presented suggesting that this may be due to the presence of contaminating thyrotrophs activity.
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