Administration of an unconjugated bile acid increases duodenal tumors in a murine model of familial adenomatous polyposis. Academic Article uri icon

Overview

abstract

  • Intestinal carcinogenesis involves the successive accumulation of multiple genetic defects until cellular transformation to an invasive phenotype occurs. This process is modulated by many epigenetic factors. Unconjugated bile acids are tumor promoters whose presence in intestinal tissues is regulated by dietary factors. We studied the role of the unconjugated bile acid, chenodeoxycholate, in an animal model of familial adenomatous polyposis. Mice susceptible to intestinal tumors as a result of a germline mutation in Apc (Min/+ mice) were given a 10 week dietary treatment with 0.5% chenodeoxycholate. Following this, the mice were examined to determine tumor number, enterocyte proliferation, apoptosis and beta-catenin expression. Intestinal tissue prostaglandin E2 (PGE2) levels were also assessed. Administration of chenodeoxycholate in the diet increased duodenal tumor number in Min/+ mice. Promotion of duodenal tumor formation was accompanied by increased beta-catenin expression in duodenal cells, as well as increased PGE2 in duodenal tissue. These data suggest that unconjugated bile acids contribute to periampullary tumor formation in the setting of an Apc mutation.

publication date

  • February 1, 1999

Research

keywords

  • Chenodeoxycholic Acid
  • Cholagogues and Choleretics
  • Duodenal Neoplasms
  • Trans-Activators

Identity

Scopus Document Identifier

  • 0032958831

PubMed ID

  • 10069468

Additional Document Info

volume

  • 20

issue

  • 2