HER2 protein expression and gene amplification in androgen-independent prostate cancer.

Abstract:

:The role of the HER2 receptor remains uncertain in the pathogenesis and progression of human prostate cancer. Previous studies have reported widely divergent rates for HER2 expression in primary prostate tumors, probably owing to significant methodologic differences in the studies. Few data exist about the frequency of HER2 protein overexpression and gene amplification in androgen-independent prostate cancer (AIPC), although recent xenograft models suggest HER2 expression may be up-regulated in the transition from androgen-dependent to androgen-independent disease. We studied the role of HER2 protein in AIPC by immunohistochemical and fluorescence in situ hybridization (FISH) analyses on AIPC specimens using well-characterized and validated reagents. Fourteen (36%) of 39 specimens expressed HER2; however, only 2 (5%) had moderate (2+) expression, and 2 (5%) had high-level (3+) expression. Two (6%) of 36 specimens had gene amplification by FISH. These data suggest that HER2 protein overexpression and gene amplification are relatively uncommon in AIPC.

journal_name

Am J Clin Pathol

authors

Reese DM,Small EJ,Magrane G,Waldman FM,Chew K,Sudilovsky D

doi

10.1309/VXKK-YVRH-9B11-YDPT

subject

Has Abstract

pub_date

2001-08-01 00:00:00

pages

234-9

issue

2

eissn

0002-9173

issn

1943-7722

journal_volume

116

pub_type

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