卵巢癌中p53基因突变和粘附分子CD44V6的表达

Expression of CD44V6 and p53 gene mutation in human ovarian carcinoma

目的 :研究p5 3基因突变、CD44V6在卵巢癌中的表达及两者与肿瘤转移之间的关系。方法 :RT PCR方法及特异探针D3 对卵巢癌细胞进行DNA印迹杂交 ,对杂交条带进行X线摄片曝光 ,并对X线摄片上的杂交条带进行灰度扫描 ,定性、定量分析CD44V6的表达 ;银染多聚酶链式反应 (PCR) 单链构象多态性 (SSCP)技术检测卵巢癌细胞p5 3基因突变。结果 :正常卵巢、良性卵巢肿瘤、卵巢癌未转移者和转移者CD44V6阳性率依次为 0 ,10 % ,75 % ,88% ,而p5 3基因突变率为 0 ,5 % ,40 % ,6 0 %二者都呈逐渐上升趋势 ,CD44V6灰度扫描表明卵巢癌转移组CD44V6表达量明显高于其他实验组 ,其中 ,肿瘤未转移者 (3 82 0 .14± 2 89.43)和转移者 (10 132 .92± 15 2 1.2 0 )相比较 ,表达量有显著差异 (P <0 .0 1)。结论 : CD44V6与p5 3基因突变相比较而言 ,CD44V6阳性率明显高于p5 3基因突变率。

Purpose:To investigate p53 gene mutation, CD44V6 expression and their relationship with metastasis of ovarian carcinoma in tumor diagnosis. Methods:PCR SSCP with silver staining was used to detect the mutation of p53 gene; by using Southern blot and image analysis, the quantitative and qualitative expression of CD44V6 were also determined. Results:The positive percentage of CD44V6 expression and p53 gene mutation was not detectable in any of the normal ovarian specimens but in the benign tumors, non metastasizing and metastasizing carcinomas it was 10%, 75%, 88% and 5%, 40%, 60% respectively. The mean dark density of each band in these four groups(mentioned above) was 85.25±23.16, 817.11±126.5, 3820.14±289.43 and 10132.92±1521.20 respectively. The expression of CD44V6 of metastasizing carcinomas was higher than that of non metastasizing group. Conclusions:The expression of CD44V6 is related to tumor metastasis; the positive percentage of CD44V6 is higher than that of p53 gene mutation in the group of metastasizing and non metastasizing tumors; Compared to p53 gene mutation, CD44V6 is a better marker for tumor metastasis.