Microsatellite instability and pathological aspects of breast cancer.

Abstract:

:Genomic instability plays a key role in hereditary nonpolyposis colorectal cancer and in a significant sub-set of non-hereditary colorectal tumors. Recent evidence suggests that microsatellite instability also occurs in various sub-sets of common, non-hereditary forms of extra-colorectal carcinoma. To investigate the role of microsatellite instability in breast cancer, and to correlate this type of alteration with clinico-pathological characteristics, including tumor proliferative activity, we analyzed the status of 8 different microsatellite loci in 28 cases of primary mammary carcinoma. For this purpose, microsatellite banding patterns were compared in paired breast-cancer/peripheral-blood DNA samples. Microsatellite instability was observed in 6/28 (21%) of the cases. Four of the 6 tumors had low proliferative activity, one had high proliferative activity, and in one case proliferative activity values were not available. All chromosomal loci investigated demonstrated microsatellite instability in one or more representative tumors of the series. Shifts in length larger than 2 bp were the most frequent change. Microsatellite instability significantly correlated with the lobular histotype, and with lymph-node involvement. A trend was also observed associating microsatellite instability and large tumor size.

journal_name

Int J Cancer

authors

Contegiacomo A,Palmirotta R,De Marchis L,Pizzi C,Mastranzo P,Delrio P,Petrella G,Figliolini M,Bianco AR,Frati L

doi

10.1002/ijc.2910640409

subject

Has Abstract,Author List Incomplete

pub_date

1995-08-22 00:00:00

pages

264-8

issue

4

eissn

0020-7136

issn

1097-0215

journal_volume

64

pub_type

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