乳腺癌易感基因蛋白在乳腺癌组织中的表达及其与临床病理关系

Relationship between the expression of the BRCA_1 protein and clinicopathological characteristics of breast cancer

目的 :探讨乳腺癌易感基因 (BRCA1 )蛋白在乳腺癌组织中的表达以及与乳腺癌临床病理的关系 ,了解BRCA1 蛋白的表达与P53及C -erbB2 表达之间的相关性。方法 :采用LDP免疫组化法对 60例乳腺癌 ,1 0例乳腺良性疾病患者的石腊标本进行了BRCA1 蛋白 ,P53 ,C -erbB2 的联合检测 ,结合患者的年龄、家族史、病理组织学分级 ,腋淋巴结的转移情况 ,雌、孕激素受体状况等因素进行相关分析。结果 :BRCA1 蛋白的阳性表达率在恶性组为 61 .66 % (37 60 ) ,在良性组表达为 0 (0 1 0 )。BRCA1 蛋白的表达绝大部分为胞质表达。BRCA1 蛋白的表达与年龄呈负相关 (r=- 0 .2 95 ,P <0 .0 5) ,与家族史呈正相关 (r=0 .50 9,P <0 .0 1 )BRCA1 蛋白的表达在不同组织学分级中 (Ⅰ～Ⅲ )存在差异 (P <0 .0 5) ,随着组织学分级的增加BRCA1 蛋白阳性表达的程度也增高 (r=0 .41 3 ,P <0 .0 1 ) ,BRCA1 蛋白的表达在有无腋淋巴结转移的病例中存在差异 (P <0 .0 5) ,随着腋淋巴结转移数目的增加 ,BRCA1 蛋白阳性表达的程度也增高 (r=0 .365 ,P <0 .0 1 )。BRCA1 蛋白的表达与ER、PR之间以及与P53及C -erbB2表达之间本研究未见其相关性。结论 :BRCA1 蛋白的表达与年轻、有家族史 ,组织学分级高 ,腋淋巴结转移相关 ,随着进一步研究的深?

Purpose:To study the relationship between the expression of the BRCA 1 protein and clinico pathological characteristics of breast cancer,and to clarify the correlation of the expression of the BRCA 1 protein with expression of p53 and c erbB 2 . Methods:The expressions of BRCA 1 , p53 and c erbB 2 of breast cancer tissues taken from 60 breast cancer patients as well as 10 benign breast disease patients were examined using immunohistochemical LDP method. All tissues were taken from formalin fixed and paraffin embedded breast tumor specimens. We analyzed the correlation of the results with other parameters which included age of onset, family history, histological grade, status of estrogen receptor and progesterone receptor, axillary nodal status and so on. Results:The expression of BRCA 1 was 61.66% (37/60) in breast cancer patients and 0 (0/10) in benign diseases patients. The protein expressed was mainly located in the cytoplasm. The correlation between age of onset and the expression of BRCA 1 was significant (r=-0.295, P <0.05). The correlation between the family history and the expression of BRCA 1 was significant (r=0.413, P <0.01) . The higher rate of the expression of BRCA 1 was found in those patients with higher histological grade ( P <0.01) and axillary lymph nodes metastases ( P <0.05). The expression of BRCA 1 had significant correlation with high nuclear grade and axillary nodal status (r= 0.413, P <0.01) (r= 0.365, P <0.01). Conclusions:Young age of onset, family history, high nuclear grade, and axillar nodal status were highly associated with expression of BRCA 1 protein. We believe that it might be a new prognostic factor in the future.