Expression of COX-2 and VEGF in benign prostatic hyperplasia combined with prostatitis

Abstract

Objectives To study the expressions of Vascular endothelial growth factor ( VEGF) and cyclooxygenase-2 in benign prostatic hyperplasia combined with Prostatitis,analyze their correlation and to investigate the effect and molecular mechanism of prostatitis on BPH.Methods 60 specimens were obtained from patients undergoing transurethral prostatic resection(TURP).The paraffin section of the specimens were stained with hematoxylin and eosin,and observed under light microscope to examine the inflammation pathological changes.Depending on whether the benign prostatic hyperplasia combined with prostatitis,those specimens were divided into group of simple benign prostatic hyperplasia ( A group) and group of benign prostatic hyperplasia combined with prostatitis ( B group),using inununohistochemistry and Real-time fluorescence quantitative PCR ( RT-PCR) to detect the expressions of COX-2 and VEGF in prostate tissues.Results (1) immunohistochemical staining: COX-2 and VEGF expressed in the A group and B group,but in the B group of tissues were significantly higher than A group of tissues( p <0.05); COX-2 and VEGF expression in the B group of organizations had a positive correlation ( R = 0.92,p <0.05) (2) COX-2 mRNA in the A group,the relative ratio; 0.141 ± 0.019,in the B group,the relative ratio: 0.161 ± 0.013;VEGF mRNA in the A group relative ratio: 0.2S4 ± 0.015,in the B group,the relative ratio; 0.341 ± 0.012,The expressions of COX-2mRNA and VEGF mRNA in the B group were significantly higher than the expressions of A group ( p <0.05) .Conclusions The inflammatory factor COX-2 and proliferative factor VEGF in the tissues of benign prostatic hyperplasia combined with prostatitis are significantly increased and the expression levels of both positive correlation,COX-2 by the way of up-regulating VEGF expression may be involved in the development process of benign prostatic hyperplasia. Key words: Prostatitis; Prostatic Hyperplasia; Endothelial Growth Factors