Ano de Publicação: 2015
AUTORIA
Alcides Chaux1,2, Sarah B Peskoe3, Nilda Gonzalez-Roibon1, Luciana Schultz1, Roula Albadine1, Jessica Hicks1, Angelo M De Marzo1,4,5, Elizabeth A Platz3,4,5, and George J Netto1,4,5
1Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
2Norte University School of Medicine, Asunción, Paraguay
3Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
4Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
5Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
RESUMO
PTEN (phosphatase and tensin homolog on chromosome 10) is one of the most frequently lost tumor suppressor genes in human cancers and it has been described in more than two-thirds of patients with advanced/aggressive prostate cancer. Previous studies suggest that, in prostate cancer, genomic PTEN loss is associated with tumor progression and poor prognosis. Thus, we evaluated whether immunohistochemical PTEN expression in prostate cancer glands was associated with higher risk of recurrence, using a nested case–control study that included 451 men who recurred and 451 men who did not recur with clinically localized prostate cancer treated by radical prostatectomy. Recurrence was defined as biochemical recurrence (serum prostate-specific antigen >0.2 ng/ml) or clinical recurrence (local recurrence, systemic metastases, or prostate cancer-related death). Cases and controls were matched on pathological T stage, Gleason score, race/ethnicity, and age at surgery. Odds ratios of recurrence and 95% confidence intervals were estimated using conditional logistic regression to account for the matching factors and to adjust for year of surgery, preoperative prostate-specific antigen concentrations, and status of surgical margins. Men who recurred had a higher proportion of PTEN negative expression (16 vs 11%, P = 0.05) and PTEN loss (40 vs 31%, P = 0.02) than controls. Men with markedly decreased PTEN staining had a higher risk of recurrence (odds ratio = 1.67; 95% confidence intervals 1.09, 2.57; P