Effects of Food Protein Quality on Protein Metabolism of Skeletal Muscle in Young Rats / 第三军医大学学报

ABSTRACT

The experimental rats were fed with 5 test diets of different protein quality.RNA content and 3-methylhistidhie(3-MH) in urine were determined.The results showed that the RNA content of the skeletl muscle cells was significantly different in rais fed with different diet.A linear correlation between RNA content and amino acid score of food protein was perceived.Food with the higher protein quality,the more 3-MH in urine was excreted.A good correlation between excrstiou of 3-MH and Net Portein Utilization(NPU),an index reflecting protein quality,existed too.These suggested that protein quality regulates the balance between auabolism and catabolism,meaning the turnover of skeletal muscle proteinThe mechanism of strengthening anabolism,not reducing catabolism,can explain that high protein quality could improve growth of animals.