膀胱癌组织及血清中内皮抑素表达的意义

目的　探讨原发性膀胱癌患者血清内皮抑素水平和组织表达与肿瘤分级、分期的关系。　方法　采用免疫组织化学方法检测 4 5例膀胱癌组织及 12例正常膀胱组织中内皮抑素表达情况。ELISA法检测 5 8例膀胱癌患者术前血清内皮抑素水平 ,4 3例健康者血清作对照。　结果　浅表性膀胱癌组内皮抑素表达率 6 1.5 % ,浸润性癌组为 90 .6 % ,正常膀胱组织为 33.3%。膀胱癌患者血清内皮抑素 4 6 .3ng/ml,显著高于对照组的 2 9.8ng/ml(P <0 .0 1)。局部浸润性膀胱癌患者血清内皮抑素 4 8.6ng/ml,显著高于浅表性癌组的 31.1ng/ml(P <0 .0 1) ;远处转移组血清内皮抑素 6 9.8ng/ml,显著高于局部浸润组 (P <0 .0 1) ;浅表性癌组与对照组血清内皮抑素水平差异无显著性意义。G3级肿瘤患者血清内皮抑素水平显著高于G1和G2 级 (P <0 .0 1)。　结论　膀胱癌患者血清内皮抑素水平和组织表达显著增高 ,并与肿瘤分级、分期相关 ,检测内皮抑素表达及血清水平有助于判断膀胱癌的恶性程度。

Endostatin expression in tumor tissues and serum levels of bladder cancer patients

Objective To study endostatin expression in tumor tissues and serum levels of bladder cancer patients. Methods Expression of endostatin in 45 cases of bladder cancer and 12 subjects with normal bladder tissues was examined immunohistochemically.Serum levels of endostatin in 58 patients with bladder cancers and 43 healthy controls were analyzed by competitive enzyme immunoassay. Results Positive expression of endostatin was found in 61.5% patients with superficial bladder cancer,90.6% with invasive bladder cancer and 33.3% in normal bladder tissues.Serum level of endostatin was significantly higher in patients with bladder cancer than that in healthy controls (P<0.01). In patients with invasive cancer,serum endostatin level was significantly higher than that in superficial cancer (P<0.01).Patients with distant metastasis had significantly higher level than localized invasive group (P<0.01).Whereas there was no significant difference between patients with superficial cancer and controls.Patients with G 3 tumors had significantly higher endostatin levels than those of patients with G 1 and G 2 tumors. Conclusions Tumor tissue expression and serum levels of endostatin elevated in patients with bladder cancer and positively correlated with stage and grade of bladder cancer.