Diurnal variations in response of rat liver tyrosine aminotransferase activity to food intake.

Abstract

Effects of fasting and refeeding on the hepatic tyrosine aminotransferase activity were examined in rats that had been fed during the night. The tyrosine aminotransferase activity showed clear diurnal variations, with a maximal activity after the feeding time. The tyrosine aminotransferase rhythm persisted even under starvation, though the amplitude decreased remarkably. When the starved rats were refed at night, the tyrosine aminotransferase activity increased rapidly to a high level, but it increased slowly to a rather lower level when they were refed in daytime.

• Authors: H Kato, M Saito
• Journal: Biochimica et biophysica acta (Biochim Biophys Acta) Vol. 627 Issue 1 Pg. 109-11 (Jan 03 1980) ISSN: 0006-3002 [Print] Netherlands
• PMID: 6101541 (Publication Type: Journal Article)

Chemical References

• Tyrosine Transaminase

Topics

• Animals
• Circadian Rhythm
• Diet
• Eating
• Food Deprivation
• Liver (enzymology)
• Rats
• Tyrosine Transaminase (metabolism)