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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Effect of 5-hydroxytryptamine and pineal metabolites on the secretion of neurohypophysial hormones.

It has been shown that 5-hydroxytryptamine and melatonin, an indoleamine for which 5-hydroxytryptamine is a precursor, influence the release of vasopressin and oxytocin from the rat hypothalamus both in vivo and in vitro. The oral administration of melatonin has been shown to decrease oxytocin release and modulate the nocturnal vasopressin release in humans. 5-hydroxytryptamine and its metabolites, 5-hydroxytryptophol, 5-methoxytryptamine and 5-methoxytryptophol, are detected within the pineal, and there is evidence that 5-methoxytryptamine and 5-methoxytryptophol may have some physiological role. The aim of this study was to evaluate the effects of 5-hydroxytryptamine, 5-hydroxytryptophol, 5-methoxytryptamine and 5-methoxytryptophol on neurohypophysial hormone release from the rat hypothalamus in vitro. It was found that 5-hydroxytryptamine and 5-hydroxytryptophol increased neurohypophysial hormone release, 5-methoxytryptamine decreased the release of vasopressin and oxytocin and 5-methoxytryptophol was found to have no effect, thus providing further evidence for a role of indole compounds in the control of neurohypophysial hormone secretion.[1]

References

  1. Effect of 5-hydroxytryptamine and pineal metabolites on the secretion of neurohypophysial hormones. Kostoglou-Athanassiou, I., Forsling, M.L. Brain Res. Bull. (1998) [Pubmed]
 
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