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Title: | Correlation between chromosome 9p21 locus deletion and prognosis in clinically localized prostate cancer |
Authors: | BARROS, Erika Aparecida Felix de; PONTES-JUNIOR, Jose; REIS, Sabrina Thalita; LIMA, Amanda Eunice Ramos; SOUZA, Isida C.; SALGUEIRO, Jose Lucas; FONTES, Douglas; DELLE, Humberto; COELHO, Rafael Ferreira; VIANA, Nayara Izabel; LEITE, Katia Ramos Moreira; NAHAS, William C.; SROUGI, Miguel |
Citation: | INTERNATIONAL JOURNAL OF BIOLOGICAL MARKERS, v.32, n.2, p.E248-E254, 2017 |
Abstract: | Background: Some studies have reported that deletions at chromosome arm 9p occur frequently and represent a critical step in carcinogenesis of some neoplasms. Our aim was to evaluate the deletion of locus 9p21 and chromosomes 3, 7 and 17 in localized prostate cancer (PC) and correlate these alterations with prognostic factors and biochemical recurrence after surgery. Methods: We retrospectively evaluated surgical specimens from 111 patients with localized PC who underwent radical prostatectomy. Biochemical recurrence was defined as a prostate-specific antigen (PSA) >0.2 ng/mL and the mean postoperative follow-up was 123 months. The deletions were evaluated using fluorescence in situ hybridization with centromeric and locus-specific probes in a tissue microarray containing 2 samples from each patient. We correlated the occurrence of any deletion with pathological stage, Gleason score, ISUP grade group, PSA and biochemical recurrence. Results: We observed a loss of any probe in only 8 patients (7.2%). The most common deletion was the loss of locus 9p21, which occurred in 6.4% of cases. Deletions of chromosomes 3, 7 and 17 were observed in 2.3%, 1.2% and 1.8% patients, respectively. There was no correlation between chromosome loss and Gleason score, ISUP, PSA or stage. Biochemical recurrence occurred in 83% cases involving 9p21 deletions. Loss of 9p21 locus was significantly associated with time to recurrence (p = 0.038). Conclusions: We found low rates of deletion in chromosomes 3, 7 and 17 and 9p21 locus. We observed that 9p21 locus deletion was associated with worse prognosis in localized PC treated by radical prostatectomy. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - FM/MCG Artigos e Materiais de Revistas Científicas - HC/ICESP Artigos e Materiais de Revistas Científicas - HC/ICHC Artigos e Materiais de Revistas Científicas - LIM/55 Artigos e Materiais de Revistas Científicas - ODS/03 |
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