BCL2 as a Subtype-Specific Prognostic Marker for Breast Cancer.

BCL2 as a Subtype-Specific Prognostic Marker for Breast Cancer.
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DOI:
10.4048/jbc.2016.19.3.252
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发表时间:
2016-09
影响因子:
2.4
通讯作者:
Chae BJ
Chae BJ
中科院分区:
医学4区
文献类型:
--
作者:
Eom YH;Kim HS;Lee A;Song BJ;Chae BJ

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B细胞淋巴瘤2(BCL2)是一种抗凋亡蛋白,也是重要的临床乳腺癌预后标志物。由于 BCL2 的作用取决于雌激素受体 (ER) 状态,因此这种作用可能因分子亚型而异。本研究的目的是评估分子亚型之间的预后结果与 BCL2 表达之间的关系。我们检索了2006年11月至2011年11月期间新诊断的1,356例恶性乳腺癌患者的数据。采用免疫组织化学方法检测ER、孕激素受体、人表皮生长因子受体2(HER2)、Ki-67和BCL2的表达。根据第13届圣加仑国际专家共识,我们将乳腺癌分为5种分子亚型,包括Luminal A、Luminal B(HER2阴性)、Luminal B(HER2阳性)、HER2过表达和三阴性亚型。我们分析了临床病理学特征,并根据五种分子亚型评估了 BCL2 表达与临床结果之间的相关性,例如无复发生存期 (RFS) 和疾病特异性生存期 (DSS)。共有605例乳腺癌(53.8%)显示BCL2表达。 BCL2 阳性表达与年轻(<50 岁,p=0.036)、较低组织学分级(p<0.001)、低 Ki-67 水平(<14%,p<0.001)、激素受体阳性(p<0.001)、HER2 阴性(p<0.001)、管腔乳腺癌(p<0.001)和低复发率相关。 (p=0.016)。在所有患者中,BCL2 阳性表达还与良好的 5 年 RFS(p=0.008,91.4%)和 DSS(p=0.036,95.6%)相关。 Luminal A 乳腺癌中的 BCL2 阳性表达导致显着有利的 5 年 RFS 和 DSS(分别为 p=0.023 和 p=0.041)。然而,BCL2 表达与其他亚型的预后无关。 BCL2 表达在乳腺癌中的预后作用具有亚型特异性。 BCL2 表达根据分子亚型的不同而有所不同,并且是仅管腔 A 型乳腺癌的良好预后标志物。
B-cell lymphoma 2 (BCL2) is an antiapoptosis protein and an important clinical breast cancer prognostic marker. As the role of BCL2 is dependent on the estrogen receptor (ER) status, this effect might differ according to molecular subtypes. The aim of this study was to evaluate the relationship between the prognostic outcomes and BCL2 expression among the molecular subtypes. We retrieved the data of 1,356 patients who were newly diagnosed with malignant breast cancer between November 2006 and November 2011. Immunohistochemistry was used to measure ER, progesterone receptor, human epidermal growth factor receptor 2 (HER2), Ki-67, and BCL2 expression. We classified breast cancer into five molecular subtypes based on the 13th St. Gallen International Expert Consensus, including luminal A, luminal B (HER2-negative), luminal B (HER2-positive), HER2-overexpression, and triple-negative subtypes. We analyzed the clinicopathological features and assessed the correlation between BCL2 expression and clinical outcomes, such as relapse-free survival (RFS) and disease-specific survival (DSS) according to the five molecular subtypes. A total of 605 cases of breast cancer (53.8%) showed BCL2 expression. BCL2-positive expression was associated with young age (<50 years, p=0.036), lower histological grade (p<0.001), low Ki-67 level (<14%, p<0.001), hormone receptor positivity (p<0.001), HER2 negativity (p<0.001), luminal breast cancer (p<0.001), and low recurrence rate (p=0.016). BCL2-positive expression was also associated with favorable 5-year RFS (p=0.008, 91.4%) and DSS (p=0.036, 95.6%) in all the patients. BCL2-positive expression in luminal A breast cancer resulted in significantly favorable 5-year RFS and DSS (p=0.023 and p=0.041, respectively). However, BCL2 expression was not associated with the prognosis in the other subtypes. The prognostic role of BCL2 expression in breast cancer is subtype-specific. BCL2 expression differs according to the molecular subtype and is a good prognostic marker for only luminal A breast cancer.
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