کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5853776 1130863 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rapid induction of colonic adenocarcinoma in mice exposed to benzo[a]pyrene and dextran sulfate sodium
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Rapid induction of colonic adenocarcinoma in mice exposed to benzo[a]pyrene and dextran sulfate sodium
چکیده انگلیسی

Previously, we reported that the mutation frequency was markedly increased in the colon after the oral treatment of mice with an environmental mutagen/carcinogen, benzo[a]pyrene (BP); however this was not followed by tumor development. The reasons for this are as yet unresolved. The purpose of the present study is to explore the mechanisms why a high frequency of mutations induced by BP in the colon is not associated with subsequent tumor development. We show in this study that oral administration of BP to CD2F1 mice at 125 mg/kg/day for 5 days can lead to adenocarcinomas in the mouse colon both at Weeks 4 (5/8 mice) and 11 (100% of mice), but only in the presence of inflammation induced by 4% dextran sulfate sodium (DSS) in the drinking water for up to 2 weeks. These data indicate that, in this DSS model, BP induced mutagenic events lead to tumors in the mouse colon, a tissue which is not a BP target organ. DSS-induced inflammation in a tissue primed with mutagenic risk is a key to the induction of tumors in this model. This study provides a novel, rapid and useful colon carcinogenesis model (BP/DSS model).

► Benzo[a]pyrene (BP) is orally mutagenic but not carcinogenic in the mouse colon. ► Inflammation in the colon is induced by dextran sulfate sodium (DSS). ► BP can produce tumors in the colon in the presence of inflammation induced by DSS.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food and Chemical Toxicology - Volume 49, Issue 11, November 2011, Pages 2997-3001
نویسندگان
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