三阴型乳腺癌中BRCA1的表达及其预后意义

摘要

目的：探讨乳腺癌易感基因1(breast cancer susceptibility gene 1, BRCA1)蛋白的表达及其对三阴型乳腺癌(triple nega-tive breast cancer, TNBC)患者预后的影响。方法采用免疫组化SP法检测95例TNBC组织蜡块中BRCA1、p53的表达,并结合患者临床病理特征进行相关性分析和预后评价。结果 TNBC中BRCA1的阳性率为31．6%,阳性患者中位年龄较阴性者明显偏小(P=0．047),且p53表达明显升高(P=0．001),阳性者与阴性者的总生存期差异无显著性(HR=1．110,95%CI=0．552~2．235,P=0．769)。结论 BRCA1蛋白表达与TNBC患者发病年龄、p53表达有关,但对患者的预后无明显影响。 p53通路与BRCA1表达在抑制肿瘤生长方面可能存在相关性。%Purpose To investigate the protein expression of breast cancer susceptibility gene (BRCA1) in triple negative breast canc-er ( TNBC) and to analyze the prognostic impact on outcome of TNBC by BRCA1 protein. Methods The expression of BRCA1 and p53 in 95 cases TNBCs was detected by immunohistochemistry. The correlation analysis and evaluation of prognosis were conducted in consideration of patients clinical and pathological characteristics. Results The positive rate of BRCA1 protein expression in TNBCs was 31. 6%. Compared with BRCA1 negative expression, those patients with BRCA1 positive expression were associated with younger age (P=0. 047) and higher expression of p53 (P=0. 001). There was no significant difference in outcome between BRCA1 positive and negative expression (HR=1. 10,95%CI=0. 552~2. 235, P=0. 769). Conclusion The expression of BRCA1 protein may have no impact on the outcome of TNBC. There is possible correlationship between p53 pathway and BRCA1 in inhibiting tumor growth.