Molecular genetic alterations as potential prognostic indicators in colorectal carcinoma.

Abstract:

:The molecular genetic alterations in colorectal carcinoma are among the best understood of any common human cancer. Identified abnormalities include both dominant-acting oncogenes (ras, myc, src) and suppressor genes which undergo inactivation or deletion (deleted in colorectal carcinoma gene [DCC], p53, adenomatous polyposis coli gene [APC], and probably loci on chromosomes 1p and 22q). Accumulation of multiple abnormalities is evident in the adenoma-carcinoma sequence with a preferential order, and alteration of DNA methylation is an especially early event. Identification of molecular genetic markers useful for classification and staging of colorectal carcinoma is in its infancy. Deletion of the p53 gene on chromosome 17p, deletion of the DCC gene on 18q, and high fractional allelic loss (fraction of evaluable nonacrocentric autosomal arms with deletion) have been associated with distant metastases and with poorer prognosis in patients without initial evidence of disseminated disease. Additional studies are needed to determine the possible role of these alterations in clinical management.

journal_name

Cancer

journal_title

Cancer

authors

Hamilton SR

doi

10.1002/1097-0142(19920315)69:6+<1589::aid-cncr282

subject

Has Abstract

pub_date

1992-03-15 00:00:00

pages

1589-91

issue

6 Suppl

eissn

0008-543X

issn

1097-0142

journal_volume

69

pub_type

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