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2018TOPOⅡα联合Ki67预测三阴性乳腺癌新辅助化疗疗效的临床应用价值

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发表于 2018-8-18 11:34:53 | 显示全部楼层 |阅读模式
  [摘要] 目的 探讨拓扑异构酶Ⅱα(TOPOⅡα)联合Ki67在预测三阴性乳腺癌新辅助化疗疗效的临床应用价值。 方法方便选取并回顾性分析2013年1月―2016年12月就诊该院乳腺外科82例三阴性乳腺癌患者,均接受蒽环联合紫杉方案新辅助化疗,探讨TOPOⅡα、Ki67表达与化疗疗效之间的相关性。 结果 82例三阴性乳腺癌患者整体pCR率为20.7%(17/82);TOPOⅡα高表达率为42.6%(35/82),pCR率为25.7%(9/35),高于低表达者pCR率17.0%(8/47),差异无统计学意义(P>0.05);Ki67高表达率为67.1%(55/82),pCR率为25.4%(14/55),高于低表达者pCR率11.1%(3/27),差异无统计学意义(P>0.05);TOPOⅡα、Ki67二者均高表达者pCR率达53.53%(8/19),明显高于整体pCR率,差异有统计学意义(P http://
  [关键词] 乳腺肿瘤;新辅助化疗;Ki67;拓扑异构酶Ⅱ
  [中图分类号] R737 [文献标识码] A [文章编号] 1674-0742(2017)11(c)-0020-03
  [Abstract] Objective This paper tries to investigate the clinical value of topoisomerase Ⅱα (TOPOⅡα) combined with Ki67 in predicting the efficacy of neoadjuvant chemotherapy for triple negative breast cancer. Methods A retrospective analysis of 82 cases of triple negative breast cancer from January 2013 to December 2016 was carried out, and all of whom received anthracycline combined with paclitaxel neoadjuvant chemotherapy, aiming to investigate the relationship between the expression of TOPO II and Ki67 and the efficacy of chemotherapy. Results The whole pCR rate was 20.7% (17/82) among the 82 patients with triple negative breast cancer; the high expression rate of TOPOⅡαwas 42.6% (35/82), pCR rate was 25.7% (9/35), higher than the low expression rate of pCR of 17.0%(8/47), the difference was not statistically significant (P>0.05); high expression rate of Ki67 was 67.1% (55/82), pCR rate was 25.4% (14/55), higher than the low expression rate of 11.1% (3/27), the difference was not statistically significant (P>0.05); pCR rate reached 53.53%(8/19) when TOPOⅡαand Ki67 with high expression rate, significantly higher than that of the overall rate of pCR, the difference was statistically significant (P4周期,术后2周左右接受根治性手术或保乳手术。排除标准:患者既往有放化疗治疗病史,炎性乳腺癌,双侧乳腺癌及妊娠期乳腺癌,一般临床资料:年龄≤40岁33例,>40岁49例;绝经前58例,绝经后24例;临床TNM分期:II期26例,III期56例;病理类型:浸润性导管癌70例,其他12例;组织学分级:1~2级44例,3级38例;Ki67≤14% 27例,Ki67 >14% 55例,TOPOⅡα低表达组47例,TOPOⅡα高表达组35例。     1.2 研究方法
  1.2.1 新辅助化疗方案 所选患者均接受EC-T或wP(表柔比星联合环磷酰胺序贯多西他赛或每周紫杉醇)或TEC方案(表柔比星联合环磷酰胺序贯多西他赛)方案新辅助化疗4~8个疗程,化疗期间每两周期乳腺彩超评估化疗疗效,化疗结束后行手术治疗,术后病理未达病理学完全缓解者,部分予以4~6个周期希罗达方案辅助化疗。
  1.2.2 免疫组化指标测定 空芯针穿刺活检组织标本置于10%甲醛中,并进行石蜡包埋,脱蜡水化,过氧化氢除去内源性过氧化物酶,抗原修复等操作步骤,免疫组化均采取S-P染色法。Topo IIa以阳性细胞数比例为判定标准:75%为(+++),Topo IIPa(-)和(+)者为阴性,(++)和(+++)者为阳性;Ki67判定标准:阳性细胞数>14%为高表达,≤14%为低表达。根据2013年St.Gallen乳腺癌不同亚型定义和分类标准:三阴性乳腺癌:ER、PR和HER2表达均阴性。
  1.3 新辅助化疗疗效评估
  针对新辅助化疗后残余肿瘤的细胞丰富程度进行评估,共分为5级。其中1级(G1)浸润癌细胞无改变或仅个别癌细胞发生改变,癌细胞数量总体未减少;2级(G2)浸润癌细胞轻度减少,但总数量仍高,癌细胞减少不超过30%;3级(G3)浸润癌细胞减少介于30%~90%;4级(G4)浸润癌细胞显著减少超过90%,仅残存散在的小簇状癌细胞或单个癌细胞;5级(G5)原肿瘤瘤床部位已无浸润癌细胞,但可存在导管原位癌。该研究中MP系统仅评估乳腺原发病灶而不评估腋窝淋巴结,MP5且淋巴结阴性者评定为pCR[2]。
  1.4 统计方法
  应用SPSS 19.0统计学软件进行分析,组间计数资料采用χ2检验,用[n(%)]表示,指标之间的相关性可用Spearman等级相关分析,P0.05)。见表1。
  2.2 TOPOⅡαa及Ki67表达情况与新辅助化疗疗效的关系
  82例接受蒽环联合紫杉方案新辅助化疗三阴性乳腺癌患者整体pCR率为20.7%(17/82);TOPOⅡα高表达率为42.6%(35/82),pCR率为25.7%(9/35),高于低表达者pCR率17.0%(8/47),差异无统计学意义(P>0.05);Ki67高表达率为67.1%(55/82),pCR率为25.4%(14/55),高于低表?_者pCR率11.1%(3/27),差异无统计学意义(P>0.05);TOPOⅡα、Ki67二者均高表达者pCR率达53.53%(8/19),明显高于整体pCR率,差异有统计学意义(P参考文献]
  [1] Chenw,Zhengr,Baadepd,et al.Cancerstatisticsin China,2015[J].Ca A Cancer J Clin,2016,66(2):115-132.
  [2] 《乳腺癌新辅助化疗后的病理诊断专家共识》编写组.乳腺癌新辅助化疗后的病理诊断专家共识[J].中华病理学杂志,2015,44(4):232-236.
  [3] Metazger-Filho O,Tutt A,de Azambuja E,et a1.Dissecting the heterogeneity of triple-negative breast cancer[J].J Clin Oncol,2012,30:1879-1887.     [4] 桑蝶,王佳玉.Ki67?c乳腺癌临床病理特征及新辅助化疗疗效的相关性[J].癌症进展,2015,13(3):291-297.
  [5] Hertel PB,Tu D,lertseu B,et a1.T1MP-I in combination with HER2 and TOPOⅡα for prediction of benefit from adjuvant anthracyclines in high risk breast cancer patients [J].Breast Cancer Res Treat,2012,132(1):225-234.
  [6] Mitrovic O,Cokic V,Dikic D,et al.Correlation between ER、PR 、HER2、Bcl-2、p53 proliferative and apoptotic indexes with HER2 gene amplification and TOPOⅡαgene amplification and deletion in four molecular subtypes of breast cancer[J].Target Oncol,2014,9(4):367-379.
  [7] Moretti E,Desmedt C,Biagioni C,et a1.TOPOⅡαprotein by quantitative immunofluoreseenee as a predictor of response to epirubiein in the neoadjuvant treatment of breast cancer[J].FutureOncol,2013,9(10):1477-1487.
  [8] Klintman M,Buus R,Cheang MC,et a1.Changes in Expression of Genes Representing Key Biologic Processes after Neoadjuvant Chemotherapy in Breast Cancer,and Prognostic Implications in Residual Disease[J].Clin Cancer Res,2016,22(10):2405-2416.
  (收稿日期:2017-08-25)
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