title: Circadian rhythms of hypothalamic norepinephrine and of some circulating substances in individually housed adult rats.
abstract: The circadian rhythms of hypothalamic norepinephrine (NE) and of circulating norepinephrine, epinephrine (E), corticosterone, aldosterone, and serotonin (5HT) were determined in group-housed and in individually housed male adult rats, adapted to a 12/12 light/dark cycle. After 5 weeks of individual housing, compared to group-housed animals, hypothalamic NE mesor decreased, while circulating NE, E, and corticosterone mesor increased. The circadian rhythms of aldosterone and 5HT were unaffected by individual housing.
authors.affiliation: Istituto di Scienze Fisiologiche Umane, II Facolta' di Medicina e Chirurgia, Universita degli Studi di Napoli Federico II, Italy.
authors.forename: A M
authors.initials: AM
authors.lastname: Greco
authors.forename: P
authors.initials: P
authors.lastname: Gambardella
authors.forename: R
authors.initials: R
authors.lastname: Sticchi
authors.forename: D
authors.initials: D
authors.lastname: D'Aponte
authors.forename: P
authors.initials: P
authors.lastname: de Franciscis
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000502:physiology; D000450:Aldosterone / Q000502:physiology*; D000818:Animals; D001143:Arousal / Q000502:physiology; D002940:Circadian Rhythm / Q000502:physiology*; D003345:Corticosterone / Q000502:physiology*; D004837:Epinephrine / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology*; D007031:Hypothalamus / Q000502:physiology*; D008297:Male; D009638:Norepinephrine / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar; D012701:Serotonin / Q000502:physiology*; D012931:Social Environment; D012934:Social Isolation
chemical_list: D012701:Serotonin; D000450:Aldosterone; D000324:Adrenocorticotropic Hormone; D003345:Corticosterone; D009638:Norepinephrine; D004837:Epinephrine