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BRCA1在散发性乳腺癌中的表达及意义 被引量:2

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摘要 目的 探讨BRCA1在散发性乳腺癌发生发展中的作用。方法 应用免疫组化技术对5例正常乳腺组织、10例良性病变乳腺组织及55例乳腺癌组织进行BRCA1免疫染色,比较BRCA1在良恶性乳腺组织中表达差异以及与乳腺癌临床病理特征之间的关系。结果 BRCA1在全部良性乳腺组织中均呈阳性显色,BRCA1染色深度分级中3+细胞占100%,阳性细胞数分级中4+细胞占100%,其全部定位于细胞核。然而只有80%(44/45)的乳腺癌组织BRCA1呈阳性反应,BRCA1染色深度分级中3+细胞只占22%,阳性细胞数分级中4+细胞只占22%,其亚细胞定位除细胞核外,也见于胞浆甚至胞核和胞浆同时存在。Ⅰ级、Ⅱ级、Ⅲ级乳腺癌其阳性细胞数分级中3+~4+细胞分别占70%、50%、10%;染色深度分组中2+~3+细胞分别占77%、66%、20%;细胞核定位率分别为77%、75%及40%。上述差异均有统计学意义(P<0.05)。BRCA1与乳腺癌组织学分型、肿块大小及发病年龄无相关关系。结论 BRCA1在乳腺癌组织中表达下降,亚细胞定位异常,可能参与散发性乳腺癌的发生发展。
出处 《实用肿瘤学杂志》 CAS 2001年第4期250-252,共3页 Practical Oncology Journal
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