Ovine corticotropin-releasing factor administration in normal men. Pituitary and adrenal responses in the morning and evening.


We administered ovine corticotropin-releasing factor (CRF) as a bolus intravenous injection (1 microgram/kg) at 09.00 and at 20.00 to assess the influence of circadian changes in the hypothalamic-pituitary-adrenal axis on the response to CRF. The increase in plasma ACTH levels after CRF was only slightly lower in the morning than in the evening. The plasma… (More)


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