Association of APC gene mutations and histological characteristics of colorectal adenomas.

Abstract:

:Fifty-nine colonic adenomas and 6 hyperplastic colonic polyps were analyzed by single-strand conformation polymorphism analysis for mutations in the adenomatous polyposis coli gene (APC). Frameshifts and premature stop codons in at least one copy of APC were detected in 25 of these adenomas. Five adenomas carried 2 APC mutations. No mutations in APC were found in any of the 6 hyperplastic polyps. The detection of APC mutations increased with size and degree of dysplasia and in rectal as compared to colonic adenomas, although the association was not statistically significant. The frequency of detectable APC mutations was higher in tubulovillous and villous adenomas (10 of 13) than in tubular adenomas (15 of 45) (odds ratio, 6.67; 95% confidence limits, 1.39-41.83; P = 0.005). The significance of the association between the detection of APC mutations and a villous architecture was confirmed in multivariate analysis (relative risk, 6.67; 95% confidence limits, 1.54-28.8; P = 0.005). In conclusion, APC mutation plays a role in adenoma progression; its frequency is significantly higher in lesions with a more villous morphology.

journal_name

Cancer Res

journal_title

Cancer research

authors

De Benedetti L,Sciallero S,Gismondi V,James R,Bafico A,Biticchi R,Masetti E,Bonelli L,Heouaine A,Picasso M

subject

Has Abstract,Author List Incomplete

pub_date

1994-07-01 00:00:00

pages

3553-6

issue

13

eissn

0008-5472

issn

1538-7445

journal_volume

54

pub_type

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