While interleukin-1 (IL-1), a monocyte-derived polypeptide, clearly stimulates the hypothalamo-pituitary-adrenal (HPA) axis, its precise site of action is controversial. In these studies, the possibility of a hypothalamic and/or a pituitary site of action was investigated in vitro, using incubated rat hypothalami and perifused dispersed pituitary cells. Both forms of IL-1, IL-1 alpha and IL-1 beta, produced a dose-dependent stimulation of CRF-41 release from incubated rat hypothalami in the d...Expand abstract
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Interleukin-1 directly stimulates the release of corticotrophin releasing factor from rat hypothalamus.
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