Clusterin is a critical downstream mediator of stress-induced YB-1 transactivation in prostate cancer

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Clusterin is a critical downstream mediator of stress-induced YB-1 transactivation in prostate cancer

American Association for Cancer Research
  • 111200 Oncology And Carcinogenesis


CIBCB_2005-39.pdf 0-7803-9387-2/05/$20.00 ©2005 IEEE Artificial Neural Network Analysis of DNA Microarray-based Prostate Cancer Recurrence Leif E. Peterson, Mustafa Ozen, Halime Erdem, Andrew Amini, Lori Gomez, Colleen C. Nelson, and Michael Ittmann Abstract—DNA microarray-based gene expression profiles have been established for a variety of adult cancers. This paper addresses application of an artificial neural network (ANN) with leave-one- out testsing and 8-fold cross-validation for analyz- ing DNA microarray data to identify genes predic- tive of recurrence after prostatectomy. Among 725 genes screened for ANN input, a 16-gene model re- sulted in 99-100% diagnostic sensitivity and speci- ficity: DGCR5, FLJ10618, RIS1, PRO1855, ABCB9, AK057203, GOLGA5, HARS, AK024152, HEP27, PPIA, SNRPF, SULT1A3, SECTM1, EIF4EBP1, and S71435. Genes identified with ANN that are prognostic of prostate cancer recurrence may be either causal for prostate cancer or secondary to the disease. Neverthe- less, the genes identified may be confirmed in the future to be markers of early detection and/or therapy. I. Introduction Prostate cancer is the 2nd leading cause of cancer mor- tality among US males[1]. For locally confined cancer, cu- rative treatment includes radical prostatectomy [2,3] and radiotherapy[4-7]. Following prostatectomy, it is expected that serum levels of prostate specific antigen (PSA) remain fixed below a level of 0.2 ng/ml. However, approximately 15-35% of patients experience PSA (biochemical) recur- rence defined as two or more successive follow-up values of PSA>0.2 ng/ml more than 30 days post-surgery [8-11]. Early biochemical recurrence occurring before 1 year post- surgery is strongly associated with metastatic disease in approximately 75% of male patients[12]. However, clin- ical and pathological factors are imperfect predictors of biochemical recurrence. Thus, it is of interest to augment clinical information with prognostic information derived from molecular markers of

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