卵巢上皮性癌组织中水通道1蛋白和mRNA的表达及其临床意义

目的探讨水通道1(AQP1)蛋白和mRNA在卵巢上皮性癌组织中的表达及其临床意义。方法采用免疫组化法、蛋白印迹法和RT-PCR技术检测35例卵巢上皮性癌、15例卵巢交界性上皮性肿瘤、15例卵巢良性上皮性肿瘤组织中AQP1蛋白和mRNA的表达,并以13例正常卵巢组织为对照。结果AQP1蛋白主要表达于卵巢上皮性肿瘤和正常卵巢组织的毛细血管及小血管内皮细胞膜,卵巢上皮性癌和卵巢交界性上皮性肿瘤组织中AQP1蛋白表达水平分别为0.39±0.12和0.43±0.21,AQP1mRNA表达水平分别为0.93±0.51和0.95±0.34,均明显高于卵巢良性上皮性肿瘤和正常卵巢组织(AQP1蛋白表达水平分别为0.27±0.13和0.24±0.13,AQP1mRNA表达水平分别为0.51±0.41和0.34±0.29;P<0.05)。卵巢上皮性癌患者腹水量≥1000ml者其癌组织中AQP1蛋白表达水平为0.46±0.13、AQP1mRNA表达水平为1.25±0.57,明显高于腹水量为1～499ml者(AQP1蛋白表达水平为0.35±0.11,AQP1mRNA表达水平为0.75±0.45;P<0.05);卵巢上皮性癌组织中AQP1蛋白和mRNA表达与其手术病理分期、病理类型、病理分级和有无淋巴结转移无关(P>0.05)。结论AQP1蛋白和mRNA过度表达在卵巢上皮性癌发生、发展中起一定的作用,是其腹水形成的原因之一。

Protein and mRNA expression of aquaporin-1 in epithelial ovarian tumors and its clinic significance

OBJECTIVE: To investigate protein and mRNA expression of aquaporin-1 (AQP1) in epithelial ovarian tumors and its clinic significance. METHODS: The protein and mRNA expressions of AQP1 were measured by immunohistochemical technique, western blot and RT-PCR in 65 cases of epithelial ovarian tumors and 13 cases of normal ovary tissue. RESULTS: AQP1 located in microvascular and small vessel epithelial cells. The protein and mRNA expressions of AQP1 in ovarian cancer (0.39 +/- 0.12, 0.93 +/- 0.51, respectively) and ovarian borderline tumors (0.43 +/- 0.21, 0.95 +/- 0.34, respectively) were significantly higher than that of ovarian benign tumors (0.27 +/- 0.13, 0.51 +/- 0.41, respectively; P < 0.05) and normal ovary tissue (0.24 +/- 0.13, 0.34 +/- 0.29, respectively; P < 0.05). Of all ovarian cancers, expression of AQP1 in cases with ascites more than 1000 ml (0.46 +/- 0.13, 1.25 +/- 0.57, respectively) was higher than that of ascites less than 1 approximately 499 ml (0.35 +/- 0.11, 0.75 +/- 0.45, respectively; P < 0.05). CONCLUSION: Over-expression of AQP1 plays an important role in development of epithelial ovarian tumors, and may be related with formation of ascites of ovarian carcinoma.