血清骨保护素诊断前列腺癌骨转移的初步研究

目的探讨骨保护素（OPG）对前列腺癌骨转移的诊断意义。方法健康男性和前列腺增生患者各30例;对前列腺癌66例患者,分为无骨转移组（M0）36例（局限性前列腺癌30例、淋巴结转移6例）和骨转移组（M1）30例,采用ELISA法测定血清OPG浓度,结合临床资料进行统计学分析。结果M,组血清OPG浓度明显高于其他各组,差异有统计学意义（P〈0．001）。血清OPG与前列腺特异性抗原和碱性磷酸酶浓度呈正相关（r=0．427,0．277;P〈0．001）;与Gleason评分和病理分级呈正相关（r=0．331,0．344;P=0．001）。受试者工作特征（ROC）曲线分析可见,OPG的曲线下面积（AUC）较碱性磷酸酶大,对骨转移的诊断价值高。结论血清OPG对前列腺癌骨转移具有重要诊断价值。

Serum osteoprotegerin as a novel marker of bone metastasis in prostate cancer

OBJECTIVE: To evaluate the diagnostic usefulness of serum osteoprotegerin (OPG) in prostate cancer bone metastasis. METHODS: Serum osteoprotegerin were measured by ELISA assay in 30 healthy men, 30 patients with benign prostatic hyperplasia, 66 patients with prostate cancer including 36 without bone metastasis (30 with localized cancer, 6 with lymph node metastasis) and 30 with bone metastasis. The results associated with clinical data were calculated statistically. RESULTS: Serum osteoprotegerin were significantly increased in patients with bone metastasis compared with others (P<0.001). OPG level had a positive correlation with either prostate specific antigen (PSA) or Alkaline phosphatase (ALP) level (r=0.427, 0.277; P<0.001); and a positive correlation with either Gleason score or grade (r=0.427, 0.277; P<0.001). ROC analysis proved that OPG had better diagnostic accuracy than ALP for detecting bone metastasis in prostate cancer. CONCLUSION: Serum osteoprotegerin could be used as a marker for diagnosis of bone metastasis in prostate cancer.