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- W1978764437 abstract "Adenomatous polyposis coli (APC) mutations are found in most colorectal tumours. These mutations are almost always protein-truncating, deleting both central domains that regulate Wnt signalling and C-terminal domains that interact with the cytoskeleton. The importance of Wnt dysregulation for colorectal tumourigenesis is well characterized. It is, however, unclear whether loss of C-terminal functions contributes to tumourigenesis, although this protein region has been implicated in cellular processes—including polarity, migration, mitosis, and chromosomal instability (CIN)—that have been postulated as critical for the development and progression of intestinal tumours. Since almost all APC mutations in human patients disrupt both central and C-terminal regions, we created a mouse model to test the role of the C-terminus of APC in intestinal tumourigenesis. This mouse (Apc) carries an internal deletion within Apc that dysregulates Wnt by removing the beta-catenin-binding and SAMP repeats, but leaves the C-terminus intact. We compared Apc mice with Apc animals. The latter allele represented the most commonly found human APC mutation and was identical to Apc except for absence of the entire C-terminus. Apc mice developed numerous intestinal adenomas indistinguishable in number, location, and dysplasia from those seen in Apc mice. No carcinomas were found in Apc or Apc animals. While similar disruption of the Wnt signalling pathway was observed in tumours from both mice, no evidence of differential C-terminus functions (such as cell migration, CIN, or localization of APC and EB1) was seen. We conclude that the C-terminus of APC does not influence intestinal adenoma development or progression. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd." @default.
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- W1978764437 date "2011-10-18" @default.
- W1978764437 modified "2023-09-30" @default.
- W1978764437 title "The C-terminus of Apc does not influence intestinal adenoma development or progression" @default.
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- W1978764437 doi "https://doi.org/10.1002/path.2972" @default.
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