title: Age affects brain protein synthesis in rats.
abstract: The purpose of the present study was to determine whether age affected the rate of brain protein synthesis in rats. Experiments were conducted on three groups of rats, ages 4, 7 or 24 wk. The fractional rates of protein synthesis in brain, liver and kidney decreased and the RNA concentration (mg RNA/g protein) declined with age. In brain, liver and kidney, the RNA concentrations were significantly correlated with the fractional rates of protein synthesis. The RNA activity [g protein synthesized/(g RNA.d)] was not related to the fractional rate of protein synthesis in any organs except cerebral cortex. The results suggest that the rate of protein synthesis in brain declines with age after weaning, and that RNA concentration is at least partly related to the fractional rate of brain protein synthesis.
authors.affiliation: Department of Home Economics, Aichi University of Education, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Hayase
authors.forename: H
authors.initials: H
authors.lastname: Yokogoshi
mesh_terms: D000375:Aging / Q000378:metabolism*; D000818:Animals; D001921:Brain / Q000378:metabolism*; D007668:Kidney / Q000254:growth & development / Q000378:metabolism; D008099:Liver / Q000254:growth & development / Q000378:metabolism; D008297:Male; D009929:Organ Size; D014176:Protein Biosynthesis; D012313:RNA / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D015430:Weight Gain
chemical_list: D012313:RNA