RÉSUMÉ
Phosphoglycerate mutase 1 (PGAM1) is upregulated in many cancer types and involved in cell proliferation, migration, invasion, and apoptosis. However, the relationship between PGAM1 and prostate cancer is poorly understood. The present study investigated the changes in PGAM1 expression in prostate cancer tissues compared with normal prostate tissues and examined the cellular function of PGAM1 and its relationship with clinicopathological variables. Immunohistochemistry and Western blotting revealed that PGAM1 expression was upregulated in prostate cancer tissues and cell lines. PGAM1 expression was associated with Gleason score (P = 0.01) and T-stage (P = 0.009). Knockdown of PGAM1 by siRNA in PC-3 and 22Rv1 prostate cancer cell lines inhibited cell proliferation, migration, and invasion and enhanced cancer cell apoptosis. In a nude mouse xenograft model, PGAM1 knockdown markedly suppressed tumor growth. Deletion of PGAM1 resulted in decreased expression of Bcl-2, enhanced expression of Bax, caspases-3 and inhibition of MMP-2 and MMP-9 expression. Our results indicate that PGAM1 may play an important role in prostate cancer progression and aggressiveness, and that it might be a valuable marker of poor prognosis and a potential therapeutic target for prostate cancer.
Sujet(s)
Animaux , Humains , Mâle , Souris , Apoptose/génétique , Caspase-3/métabolisme , Lignée cellulaire tumorale , Mouvement cellulaire/génétique , Prolifération cellulaire/génétique , Délétion de gène , Techniques de knock-down de gènes , Matrix metalloproteinase 2/métabolisme , Matrix metalloproteinase 9/métabolisme , Souris nude , Invasion tumorale/génétique , Transplantation tumorale , Cellules PC-3 , Phosphoglyceromutase/génétique , Tumeurs de la prostate/anatomopathologie , Protéines proto-oncogènes c-bcl-2/métabolisme , Petit ARN interférent , Transplantation hétérologue , Protéine Bax/métabolismeRÉSUMÉ
<p><b>OBJECTIVE</b>To investigate the correlation of vasectomy with the risk of prostate cancer in Chinese men.</p><p><b>METHODS</b>We systematically searched the databases CNKI, VIP, Wanfang, PubMed, Embase, and Cochrane Library for the literature relating the relationship between vasectomy and the risk of prostate cancer in Chinese males up to December 2014. According to the inclusion and exclusion criteria, two investigators independently selected the eligible publications, evaluated their quality, and extracted relevant information, followed by a meta-analysis with the software STATA 12.0.</p><p><b>RESULTS</b>Nine studies were included in the analysis involving 1 202 cases of prostate cancer and 4,496 controls. Random-effect model analysis revealed no statistically significant correlation between vasectomy and the risk of prostate cancer (OR = 1.05; 95% CI 0.62-1.79), with an obvious heterogeneity (P < 0.001, I2 = 85.7%). No significant publication bias was found among the included studies (Egger, P = 0.824; Begg, P = 0.348).</p><p><b>CONCLUSION</b>The results of our meta-analysis do not support the association of vasectomy with the increased risk of prostate cancer in Chinese population.</p>