کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1939325 | 1050759 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Proteasome inhibitor MG-132 enhances whole-body protein turnover in rat Proteasome inhibitor MG-132 enhances whole-body protein turnover in rat](/preview/png/1939325.png)
Proteasome inhibitors are novel therapeutic agents which may be used in treatment of cancer and other severe disorders. We studied the effect of proteasome inhibitor MG-132 on protein and amino acid metabolism. In MG-132-treated rats we observed a significant decrease in proteasome-dependent proteolysis in skeletal muscle and an increase in whole-body protein turnover (i.e., increase in whole-body proteolysis and protein synthesis). Proteasome-dependent proteolysis was activated in the liver and kidney, protein synthesis increased in skeletal muscle, liver, and kidney. Insignificant changes were found in jejunum and colon. MG-132 administration induced a significant increase in concentration of several amino acids in blood plasma and their decrease in jejunum and colon. We conclude that administration of MG-132 affects both protein anabolic and protein catabolic pathways via the direct effect on proteasome-dependent proteolysis and indirect effect on proteolysis and protein synthesis via unidentified mediators.
Journal: Biochemical and Biophysical Research Communications - Volume 345, Issue 1, 23 June 2006, Pages 38–42