论文摘要
前言我国为原发性肝癌(PHC)高发地区,且形势严峻。就死亡率而言,我国PHC 为第3位癌症,每年有11 万人死于肝细胞癌(HCC),其中男性8 万,女性3 万,占全世界PHC 死亡数的45 %。众多学者报道,HCC 与HBV、HCV 肝炎,肝纤维化,肝硬化关系密切,这就为PHC 的预防带来诸多困难。因此,肝癌的发病机制研究仍是目前研究的热点,特别是TGF-Smad 信号转导通路在肝癌发生、发展中的作用日益受到重视。因此,我们收集了我院近年来HCC 的临床手术标本,并观察癌与癌旁组织中Smad 2 蛋白、Smad 2 mRNA、Smad 4 蛋白、Smad 4 mRNA 的表达,以及TGFβ1 与AFP 的变化,初步探讨TGFβ1、Smad 基因在PHC 发生中的可能作用机制。材料与方法1、经临床手术切除HCC 带癌旁组织标本41 例,其中男30 例,女11 例;年龄29—67岁,平均51.1 岁。5 例外伤性肝破裂手术切除标本作正常对照。运用免疫组化(IHC)ABC 法检测HCC 组织切片中癌与癌旁TGFβ1 与AFP 的表达;染色结果参照Fromowitz 等的综合计分法,阳性细胞按百分比计为0--4 分,阳性信号按强度计为0--3 分,两分相加,0 分为阴性(—),2--3 分为弱阳性(+),4--5 分为中度阳性(++),6--7 分为强阳性(+++)。比较癌与癌旁TGFβ1 与AFP 表达的差异。2、运用IHC ABC 法及原位杂交法(ISH)检测HCC 组织切片中癌与癌旁Smad 2蛋白、Smad 2 mRNA 的表达。比较癌与癌旁Smad 2 蛋白、Smad 2 mRNA 表达的差异。
论文目录
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