Alpha-amylase circadian rhythm of young rat parotid gland: an endogenous rhythm with maternal coordination.
The circadian rhythm of alpha-amylase, E.C. 3.2.1.1. alpha-1,4-glucan-4-glucanohydrolase) in the parotid glands of 25-day-old rats were studied under different experimental designs (fasting, reversed photoperiod, constant lighting conditions and treatment with reserpine and alpha-methyl-p-tyrosine). The rhythm of fasted rats did not change. There were modifications in the rhythm of rats submitted to a reversed photoperiod or treated with reserpine or alpha-methyl-p-tyrosine. The rhythm was present, with changes in the acrophase, in parotids of rats kept during their gestation and postnatal life in constant light or dark. Results suggest that the circadian rhythm of alpha-amylase in parotid gland of young rats is endogenous, synchronized by the photoperiod, and with maternal coordination.
Bellavía
S L
SL
Cátedras de Quimica Biológica, Facultades de Odontologia & Ciencias Médicas, Universidad Nacional de Córdoba, Argentina.
Sanz
E G
EG
Sereno
R
R
Vermouth
N T
NT
D000375:Aging / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D000818:Animals; D002940:Circadian Rhythm / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D005260:Female; D005508:Food Deprivation / Q000502:physiology; D008027:Light; D008297:Male; D008781:Methyltyrosines / Q000494:pharmacology; D010306:Parotid Gland / Q000187:drug effects / Q000201:enzymology* / Q000528:radiation effects; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D051381:Rats; D011919:Rats, Inbred Strains; D012110:Reserpine / Q000494:pharmacology; D000516:alpha-Amylases / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D019805:alpha-Methyltyrosine
D008781:Methyltyrosines; D019805:alpha-Methyltyrosine; D012110:Reserpine; D000516:alpha-Amylases