Abstract
The effects of dietary bile acids on the development of pepsinogenaltered pyloric glands (PAPG) were examined. Male WKY NCrj rats were given a single dose of 160 mg/kg body wt. of N-methyl-N′-nitro-N-nitrosoguanidine (MNNG) by gastric intubation and fed basal diet containing 0.3% sodium taurocholate (Na-TC), 0.3% sodium cholate (Na-C), 0.3% sodium glycocholate (Na-GC), 0.3% sodium tauroglycocholate, 0.3% sodium deoxycholate, 0.1% chenodeoxycholic acid or 0.5% lithocholic acid for 14 weeks. All rats also received 1 ml of saturated NaCl solution 4 times by i.g. intubation. At the end of week 16, the animals were killed, and the number of PAPG per cm of mucosal length was determined immunohistochemically. Na-TC, Na-C and Na-GC significantly increased the number of PAPG over the control value, suggesting that they may have activity to promote gastric carcinogenesis.
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