Abstract
The effects of CRF(41), oxytocin (OT), and arginine vasopressin (AVP) on ACTH secretion were studied alone and in combination in an in vitro system of superfused rat hemipituitaries. CRF(41) (10 −9M) and AVP (10 −8M) alone produced a significant increase in ACTH secretion while OT (10 −8M) alone had no effect. However the same concentration of OT markedly potentiated the ACTH response to CRF(41) while having no effect on the ACTH response to AVP. The data support a physiologic role for OT in the regulation of ACTH secretion.
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