细胞表面糖蛋白表达异常与涎腺多形性腺瘤复发的关系

The Relationship of Abnormal Expression of Cell Glucoprotein with Recurrence of Pleomorphic Adenoma in Salivary Gland

目的研究多形上皮粘蛋白1(mucin1)和E_钙粘蛋白(E_cd)与涎腺多形性腺瘤复发的关系,探讨可预测涎腺多形性腺瘤复发的指标。方法以52例涎腺多形性腺瘤石蜡标本为研究对象,其中初发33例,复发12例,恶性7例。采用显微镜观察肿瘤周围包膜的状况,免疫组织化学检测初发、复发、恶性多形性腺瘤细胞的mucin1和E_cd蛋白表达情况。结果初发和复发多形性腺瘤的包膜状况差异无显著性(P>0.05)。初发多形性腺瘤细胞的mucin1蛋白表达阳性率(64%)与复发者(67%)的差异无显著性(P>0.05)。两者的差别表现为mucin1阳性表达部位分布不同,初发者主要为细胞顶膜染色(19/21),复发者主要为整个细胞膜染色(6/8),两者差异有显著性(P<0.05);恶性多形性腺瘤染色部位与复发者相同,且阳性表达率显著升高。3种肿瘤的E_cd表达阳性率差异无显著性(P>0.05)。结论多形性腺瘤的包膜状况在预测其复发潜能上实际应用性不强,多形性腺瘤细胞E_cd的表达改变与其复发潜能无显著关系。Mucin1在多形性腺瘤细胞膜上的异常分布,使其倾向于向周围分散生长,这种异常分布可作为预测多形性腺瘤复发的指标之一。

Objective To study the relationship of expression of mucin 1 and E-cadherin with recurrence of pleomorphic adenoma in salivary gland, and to investigate the signal to predict the recurrence potential of the tumor.Methods The capsule of tumor was observed by microscope. The expression of mucin 1 and E-cadherin in 33 cases of primary adenoma, 12 cases of recurrent pleomorphic adenomas and 7 cases of malignant pleomorphic adenomas were detected by immunohistochemistry.Results There was no significant difference about the status of capsule and the positive rate of mucin 1 expression between primary and recurrent pleomorphic adenoma (P>0.05). The abnormal distribution of mucin 1 expression was observed in recurrent pleomorphic adenoma (6/8), which was characterized by the positive staining of the whole cytomembrane. On the other hand,positive staining of the primary pleomorphic adenoma was observed on the top of the membrane (19/21). The difference was statistically significant (P<0.05). The staining pattern in malignant pleomorphic adenoma was similar with the recurrent ones except higher ratio of positive expression .No significant different was observed among the three kind of tumors on the expression rate of E-cadherin(P>0.05).Conclusion The status of capsule didn′t have much actual usage in predicting the recurrence of pleomorphic adenoma. There was no significant relationship between the expression of E-cd and the recurrence of the tumor. The abnormal distribution of mucin 1 expression contributes to the invasiveness of the tumor and can be used as the predictive signal for recurrence of pleomorphic adenoma.