title: Diurnal rhythm of vasotocin in the pineal of the male rat.
abstract: The pineal content of arginine vasotocin in the male rat is subject to diurnal changes, having a high value around noon and a low value around midnight. Since in rats exposed to 24 h constant light the pineal content in arginine vasotocin decreases, and in the rats exposed to 24 h constant darkness the pineal content in arginine vasotocin increases, it appears that during the night both the synthesis and release of arginine vasotocin is enhanced.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D003624:Darkness; D007016:Hypophysectomy; D008027:Light; D008297:Male; D010870:Pineal Gland / Q000378:metabolism* / Q000502:physiology; D051381:Rats; D014668:Vasotocin / Q000378:metabolism*
chemical_list: D014668:Vasotocin