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- W1567290559 abstract "Dietary purines and pyrimidines are not considered to have a nutritional role, much less a direct effect on the functioning of the gastrointestinal tract. We found that a dramatic decrease in adult rat small intestinal and colonic total ribonucleic acid (RNA) results from the removal of dietary purines and pyrimidines or the administration of 6-mercaptopurine. Ribonucleic acid hybridization analysis indicated specific decrease of the messenger ribonucleic acid (mRNA) for the purine salvage enzymes hypoxanthine-guanine phosphoribosyl transferase and adenine phosphoribosyl transferase in the small intestine and proximal colon but not in the liver of animals fed a diet lacking purines and pyrimidines. Levels of intestinal and hepatic beta-actin mRNA transcripts were generally not depressed by either diet or by the administration of 6-mercaptopurine. Liver hypoxanthine-guanine phosphoribosyl transferase and adenine phosphoribosyl transferase mRNAs were unaffected by the change in diet but were lowered by the administration of 6-mercaptopurine. These data indicate that nutrition and 6-mercaptopurine affect both total RNA, and individual mRNA concentrations at specific sites in the gastrointestinal tract. These findings are of potentially great significance because the regulation of intestinal total RNA levels and purine salvage mRNAs by both 6-mercaptopurine and a purine- and pyrimidine-free diet suggests a potential mechanism by which dietary components differentially control specific proteins synthesized in the body. These findings may be related to the efficacy of 6-mercaptopurine as well as so-called elemental diets as therapeutic agents in chronic inflammatory bowel disease (i.e., Crohn's disease)." @default.
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- W1567290559 date "1987-11-01" @default.
- W1567290559 modified "2023-09-27" @default.
- W1567290559 title "Tissue-specific gene expression results from a purine- and pyrimidine-free diet and 6-mercaptopurine in the rat small intestine and colon" @default.
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- W1567290559 doi "https://doi.org/10.1016/0016-5085(87)90564-6" @default.
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