Expression and Clinical Significance of PPARγ in Bladder Urothelial Cancer / 华中科技大学学报(医学版)

ABSTRACT

Objective To investigate the expression and clinical significance of peroxisome proliferator activated receptor γ(PPARγ)in bladder urothelial cancer tissues.Methods Parafflin‐embeded specimen of bladder urothelial cancer tissues from 50 cases and normal tissues near the bladder urothelial cancer from 5 cases were harvested from the Pathology Department of the Renmin Hospital of Wuhan University between 2006 and 2009.Those cases had complete pathological and clinical data.The ex‐pression of PPARγ was detected by immunohistochemical SP method.Quantitative analysis of the PPARγ was measured by high definition pathological graphics context report system (HPIAS‐1000).One‐way analysis of variance and SNK (q)tests were used to analyze the mean density and the positive area rate of the immunohistochemical results.All data were processed by SPSS 13.0.Results The expression of PPARγwas significantly higher in bladder urothelial cancer tissues than in para‐carcinoma tis‐sues(P<0.05).Correlation between expression of PPARγ with TNM stag of bladder urothelial cancer was as followsPositive rate of PPARγin the tissues with primary tumor size ≥3 cm was 72.4% ,significantly higher than 33.3% in the tissues with tumor size <3 cm(P<0.05);positive rate of PPARγin the cases with lymph node metastasis was 72.7% ,significantly higher than 46.4% in the cases without lymph node metastasis(P<0.05);positive rate of PPARγin patients at stage T3‐4 group was 75.0% ,significantly higher than 41.9% and 45.5% in patients at clinical stage T1 and T2(P<0.05);positive rate of PPARγin patients with poor differentiation was 68.2% ,significantly higher than 42.9% in patients with high or middle differentiation group(P<0.05).Conclusion PPARγ plays an important regulating role in the onset and progress of bladder urothelial cancer ;PPARγexpression level was correlated with primary tumor size ,pathological types and differentiation degree ,lymph node me‐tastasis and clinical stage.This result suggested that PPARγ was closely correlated to metastasis of bladder urothelial cancer.