角质细胞生长因子及其受体在葡萄胎恶性变中的作用

Effects of KGF/KGFR on the malignant transformation of hydatidiform mole

目的探讨角质细胞生长因子(KGF)及其受体(KGFR)在葡萄胎组织发生、发展及预后中的意义和作用。方法收集葡萄胎、侵蚀性葡萄胎、绒癌组织,采用免疫组化、原位杂交法分别从蛋白质、mRNA水平检测KGF和KGFR在良恶性葡萄胎组织中的表达,染色强度及阳性细胞数进行统计分析。结果良性葡萄胎组织滋养细胞中KGF和KGFRmRNA、蛋白均有一定程度表达,定位于细胞滋养细胞、合体滋养细胞胞质。恶性葡萄胎组织KGF表达与良性葡萄胎无差异,但KGFR在合体滋养细胞中表达明显高于良性葡萄胎,两者之间有显著性差异(χ2=12·775,P<0·01)。KGFR在侵蚀性葡萄胎及绒癌组织中的表达也明显高于良性葡萄胎(χ2=19·542,χ2=24·723,P<0·001)。结论KGF及KGFR的表达与滋养细胞肿瘤转移密切相关,在葡萄胎恶性变及浸润、转移中起重要作用。

Objective To investigate the effects of keratinocyte growth factor（KGF） and keratinocyte growth factor receptor（KGFR） on the malignant transformation of gestational trophoblastic disease（GTD）.Methods Immunolocalization of KGF/KGFR was performed on sections prepared with the samples from 26 hydatidiform mole,18 invasive mole and 12 choriocarcinoma.The in situ hybridization was used to detect the mRNA of KGF/KGFR in the tissues of hydatidiform mole and GTD.Analysis was performed according to intensity of staining and number of positive cells.Results It was revealed that specific staining for mRNA and protein of KGF/KGFR existed in hydatidiform mole and gestational trophoblastic tumor（GTT）.The mRNA and protein of KGF/KGFR were allocated in cytoplasm of syncytiotrophoblasts and cytotrophoblasts of malignant hydatidiform mole,and the KGF/KGFR protein was also expressed in benign tissue,while the expression of KGFR in malignant hydatidiform mole was significantly higher than that in benign tissue（χ2=12.775,P〈0.01）.The expression of KGFR showed an ascending tendency from malignant hydatidiform mole to invasive mole and choricarcinoma（χ2=19.542,χ2=24.723,P〈0.001）.Conclusion Differential expression of KGF/KGFR in hydatidiform mole may play a critical role in the regulation of trophoblast invasion.Current studies have demonstrated that the over expression of KGFR and KGF plays an important role in progression and metastatic capability of human gestational trophoblastic disease.