title: Organ pattern of age-related changes in the aminoacyl-tRNA synthetase activities of the mouse.
abstract: The specific activities of 17 aminoacyl-tRNA synthetases from liver, lung, heart, spleen, kidney, small intestine and skeletal muscle of young (2 months) and aged (39 months) female Han:NMRI mice were determined under standard conditions of sample preparation and assay. The average reduction of total activity during ageing is 70% for liver, 50% for lung and spleen, nearly 40% for heart and kidney and nearly 20% for intestine and skeletal muscle. Detailed comparison reveals no general, but an organ-specific pattern. Aminoacyl-tRNA synthetases were, furthermore, found to be ribosome-associated in higher proportions in liver tissue from aged mice.
mesh_terms: D000375:Aging; D000604:Amino Acyl-tRNA Synthetases / Q000378:metabolism*; D000818:Animals; D005260:Female; D007421:Intestine, Small / Q000201:enzymology; D007668:Kidney / Q000201:enzymology; D008099:Liver / Q000201:enzymology; D008168:Lung / Q000201:enzymology; D051379:Mice; D009132:Muscles / Q000201:enzymology; D009206:Myocardium / Q000201:enzymology; D013154:Spleen / Q000201:enzymology; D014018:Tissue Distribution
chemical_list: D000604:Amino Acyl-tRNA Synthetases