Abstract
To test whether p34cdc2 overexpression, CD44s downregulation, and HER-2/neu amplification correlate with disease recurrence after radical prostatectomy, and to evaluate a possible biologic association between p34cdc2 and HER-2/neu expression. Immunohistochemical (IHC) detection of both p34cdc2 cyclin-dependent kinase (CDK) and CD44s expression and fluorescence in situ hybridization (FISH)-based analysis of HER-2/neu gene status were performed on formalin-fixed, paraffin-embedded sections of 106 prostatic adenocarcinomas (PACs). Findings were correlated with Gleason grade, pathologic stage, DNA ploidy, and postsurgical biochemical disease recurrence. CDK overexpression correlated with tumor grade (P = .001), DNA ploidy (P = .001), pathologic stage (P = .04), and disease recurrence (P = .01). CD44s downregulation correlated with grade (P = .03), ploidy (P = .01), and recurrence (P = .02). HER-2/neu amplification correlated with grade (P = .001), ploidy (P = .001), and recurrence (P = .01). On multivariate analysis, CDK overexpression independently predicted recurrence (P = .001) after prostatectomy. CDK expression correlated with HER-2/neu status with 32 of 65 (49%) tumors that overexpressed CDK and showed concomitant HER-2/neu a...Continue Reading
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