Growth factor expression and proliferation kinetics in periampullary neoplasms in familial adenomatous polyposis.

Abstract:

BACKGROUND:Patients with familial adenomatous polyposis develop periampullary adenomas at a high rate. However, little is known regarding the factors that control the growth, the natural history, or the malignant potential of these tumors. METHODS:In this study, the authors systematically evaluated the expression of the intestinal peptide growth factor, transforming growth factor-alpha (TGF-alpha), and its corresponding receptor, epidermal growth factor-receptor (EGF-R), in 49 periampullary adenomas and 6 periampullary carcinomas from 29 patients. Tumor proliferation rates were evaluated with the MIB-1 antibody. RESULTS:All periampullary adenomas and carcinomas (100%) had TGF-alpha expression, whereas 63% of adenomas and 67% of carcinomas expressed EGF-R. The extent of TGF-alpha expression was greater in carcinomas compared with adenomas and increased progressively in adenomas relative to the degree of dysplasia and villous architecture of these lesions. The extent of EGF-R expression correlated only with the degree of dysplasia in adenomas. With regard to proliferation kinetics, higher MIB-1 labeling indices were observed in adenomas that were larger, more severely dysplastic, and villous. Transforming growth factor-alpha, and to a lesser extent, EGF-R expression, correlated directly with the MIB-1 labeling indices. CONCLUSIONS:These results support the adenoma-carcinoma sequence in the progression of malignancy in the duodenum in familial adenomatous polyposis, suggesting a possible involvement for TGF-alpha and EGF-R expression in this process.

journal_name

Cancer

journal_title

Cancer

authors

Resnick MB,Gallinger S,Wang HH,Odze RD

doi

10.1002/1097-0142(19950715)76:2<187::aid-cncr28207

subject

Has Abstract

pub_date

1995-07-15 00:00:00

pages

187-94

issue

2

eissn

0008-543X

issn

1097-0142

journal_volume

76

pub_type

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