Truncated mouse adenomatous polyposis coli reduces connexin32 content and increases matrilysin secretion from Paneth cells

T. Husøy, H.B. Ølstørn, H.K. Knutsen, E.M. Løberg, V. Cruciani, S.-O. Mikalsen, I.L. Goverud, J. Alexander

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Heterozygous mutations in adenomatous polyposis coli (APC) is an early event in inheritable and sporadic colon cancer development. We recently found reduced connexin (Cx43) expression in intestinal cell lines with heterozygous Apc mutation. In this study we investigated Cx expression and the role of one mutated Apc allele in epithelia of multiple intestinal neoplasia (Min) mouse intestines by immunohistochemistry. Cx43 was not expressed in intestinal epithelia of Min and wild-type mice. Cx32 was specifically expressed in enterochromaffin cells in both mice types, and in Paneth cells of wild-type mice. In contrast, Min mice had nearly undetectable level of Cx32 in Paneth cells. Isolated small intestinal crypts from Min mice had markedly increased secretion of both lysozyme and matrilysin compared with wild-type mice. Absence of matrilysin in Min mice reduces adenoma development. Reduced Cx32 and increased matrilysin secretion from Paneth cells could be important to neoplastic development in the intestine.
Original languageEnglish
Pages (from-to)1599-1603
Number of pages5
JournalEuropean Journal of Cancer
Volume40
Issue number10
DOIs
Publication statusPublished - 2004

Keywords

  • Adenomatous polyposis coli
  • Connexin
  • Paneth cells
  • Matrilysin
  • Colon cancer

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