Brain corticotropin-releasing hormone increases arousal in stress.
The effect of restraint stress on pentobarbital-induced sleeping time was examined in rats. Restraint for 60 and 75 min significantly shortened pentobarbital-induced sleeping time. The shortening of sleeping time by restraint was completely reversed by intracerebroventricular (i.c.v.) administration of alpha-helical CRH(9-41), a corticotropin-releasing hormone (CRH) receptor antagonist. In conjunction with our previous finding that i.c.v. administration of CRH shortens pentobarbital-induced sleeping time, the results suggest that restraint stress increases arousal through brain CRH.
Shibasaki
T
T
Department of Medicine, Tokyo Women's Medical College, Japan.
Yamauchi
N
N
Hotta
M
M
Imaki
T
T
Oda
T
T
Ling
N
N
Demura
H
H
D000818:Animals; D001143:Arousal / Q000187:drug effects; D002552:Cerebral Ventricles / Q000187:drug effects / Q000502:physiology / Q000503:physiopathology*; D003346:Corticotropin-Releasing Hormone / Q000008:administration & dosage / Q000037:antagonists & inhibitors / Q000494:pharmacology* / Q000502:physiology*; D007276:Injections, Intraventricular; D008297:Male; D010446:Peptide Fragments / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D012149:Restraint, Physical; D012890:Sleep / Q000187:drug effects; D013315:Stress, Psychological / Q000503:physiopathology*
D010446:Peptide Fragments; D003346:Corticotropin-Releasing Hormone; C045089:corticotropin releasing hormone (9-41)