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Glucocorticoids modulate rat hypothalamic corticotrophin-releasing factor release induced by interleukin-1
J C Cambronero1, J Borrell, C Guaza
1Department of Psychobiology, Cajal Institute, CSIC, Madrid, Spain.
Abstract:
Continuous in vitro perifusion of rat hypothalami with interleukin-1 beta (IL-1) increased corticotropin-releasing factor (CRF) secretion in a dose-dependent manner, in the range of 1 to 5 U/ml. The stimulatory action of IL-1 was significantly attenuated by dexamethasone, both by addition to the perifusion medium and by in vivo dexamethasone pretreatment. The data suggest that an immunoneuroendocrine interaction circuit, subjected to glucocorticoid negative feedback, has an essential role in maintaining organism homeostasis.
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