Title : Natural and melatonin-stimulated changes in the circadian rhythm of prolactin secretion in the ewe during seasonal anestrus.

Pub. Date : 1997 Nov

PMID : 9387855






5 Functional Relationships(s)
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1 Natural and melatonin-stimulated changes in the circadian rhythm of prolactin secretion in the ewe during seasonal anestrus. Melatonin prolactin Homo sapiens
2 The decreased amplitude and duration of nocturnal melatonin secretion were accompanied with changes in the daily pattern of prolactin secretion. Melatonin prolactin Homo sapiens
3 Melatonin infused into the third ventricle evoked an abrupt increase in the concentration of prolactin after 30 min, and the enhanced prolactin level was significantly higher than during the control infusion (range from 204 +/- 75 to 248 +/- 48 ng/ml vs. 128 +/- 68 to 149 +/- 93 ng/ml, mean +/- SD). Melatonin prolactin Homo sapiens
4 Melatonin infused into the third ventricle evoked an abrupt increase in the concentration of prolactin after 30 min, and the enhanced prolactin level was significantly higher than during the control infusion (range from 204 +/- 75 to 248 +/- 48 ng/ml vs. 128 +/- 68 to 149 +/- 93 ng/ml, mean +/- SD). Melatonin prolactin Homo sapiens
5 These data suggest that short-term infusions of melatonin stimulate the secretion of prolactin in the ewe under increasing daylength conditions, and that this effect is not mediated by changes in DA release. Melatonin prolactin Homo sapiens