Increasing development of pepsinogen-altered pyloric glands and adenocarcinoma in glandular stomach of analbuminemic rats.
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| Abstract |
The susceptibility of pepsinogen-altered pyloric glands (PAPG) and neoplastic glandular stomach lesions induced by N-methyl-N-nitro-N-nitrosoguanidine (MNNG) and catechol or sodium cholate in Nagase analbuminemic rats (NAR) was compared to Sprague-Dawley rats (SD). Male NAR and SD rats were given a single dose of 80 mg/kg body weight of MNNG by gastric intubation and, 2 weeks later, fed basal diet containing 0.8% catechol or 0.3% sodium cholate for 18 weeks. The animals were killed at the end of week 20 or after maintenance on basal diet at week 60. The number of pepsinogen-altered pyloric glands at week 20 was significantly (P < 0.001) higher in NAR fed either catechol or sodium cholate compared with SD rats. At week 60, adenomatous hyperplasias and adenocarcinomas were observed in 7 (88%; P < 0.01) and 3 (38%; P < 0.01) of 8 NAR fed catechol and in 4 (22%) and 0 of 18 SD rats, respectively. The results show that the frequency of PAPG in NAR and SD rats is related to the susceptibility to glandular stomach carcinoma. PAPG is a useful endpoint lesion for evaluation of gastric carcinogenicity in a 20-week carcinogenicity test, and NAR are sensitive for glandular stomach carcinogenesis.
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| Authors | K Ogawa, Y Shichino, M Tatematsu, C Furihata, M Asamoto, S Nagase, T Shirai, N Ito |
| Journal | Cancer letters (Cancer Lett) Vol. 96 Issue 2 Pg. 219-24 (Sep 25 1995) ISSN: 0304-3835 [Print] Ireland |
| PMID | 7585460 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't) |
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