| Literature DB >> 2474174 |
A M Greco1, P Gambardella, R Sticchi, D D'Aponte, G Di Renzo, P De Franciscis.
Abstract
Circadian rhythms of hypothalamic serotonin (5HT), its precursor tryptophan (TP) and its metabolite 5-hydroxy-indoleacetic acid (5HIAA), and of prolactin and corticosterone circulating hormones were determined in group-housed and in individually-housed male rats, adapted to a 12:12 light/dark cycle. After 5 weeks of individual housing, 5HT peaked later, TP and 5HIAA peaked earlier, and the mesor level of TP and 5HIAA decreased with respect to group-housed animals. Individual housing caused an increase in the corticosterone mesor level, but did not affect amplitude or acrophase. The circadian rhythm of prolactin was unchanged by individual housing.Entities:
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Year: 1989 PMID： 2474174 DOI： 10.1016/0031-9384(89)90141-8
Source DB: PubMed Journal: Physiol Behav ISSN： 0031-9384