Expression of oestrogen receptor-beta in oestrogen receptor-alpha negative human breast tumours.

Expression of oestrogen receptor-beta in oestrogen receptor-alpha negative human breast tumours.
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DOI:
10.1038/sj.bjc.6603295
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发表时间:
2006-09-04
影响因子:
8.8
通讯作者:
--
中科院分区:
医学1区
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为了分析仅表达雌激素受体-β (ERβ) 的乳腺肿瘤的表型,使用组织微阵列来研究 ERβ 亚型是否与 ERα 阴性肿瘤中的特定预后标志物和基因表达表型相关。 ERα 阴性肿瘤的 ERβ1 阳性率为 58% (n=122/210),总 ERβ 阳性率为 60% (n=115/192),ERβ2/cx 阳性率为 57% (n=114/199)。雌激素受体β1和总ERβ与Ki67(r=0.28,P<0.0001,n=209;r=0.29,P<0.0001,n=191)和基础表型标志物CK5/6显着相关(r=0.20,P=0.0106,n=170;r=0.18, P=0.0223,n=158)。 ERβ2/cx 与 p-c-Jun 和 NF-κBp65 密切相关(r=0.53,P<0.0001,n=93;r=0.35,P<0.0001,n=176)。这项研究表明,ERα 阴性乳腺肿瘤中存在一系列 ERβ 亚型表达。虽然 ERβ1、总表达和 ERβ2/cx 的表达是相关的,但个体形式显示出与某些表型的关联,这表明在 ERα 阴性癌症亚型中具有不同的作用。根据我们的体内观察,ERβ 可能有潜力成为 ERα 阴性乳腺癌特定亚群的治疗靶点。
To analyse the phenotype of breast tumours that express oestrogen receptor-β (ERβ) alone tissue microarrays were used to investigate if ERβ isoforms are associated with specific prognostic markers and gene expression phenotypes in ERα-negative tumours. ERα-negative tumours were positive for ERβ1 in 58% of cases (n=122/210), total ERβ in 60% (n=115/192) and ERβ2/cx in 57% of cases (n=114/199). Oestrogen receptor-β1 and total ERβ were significantly correlated with Ki67 (r=0.28, P<0.0001, n=209; r=0.29, P<0.0001, n=191) and with CK5/6, a marker of the basal phenotype (r=0.20, P=0.0106, n=170; r=0.18, P=0.0223, n=158). ERβ2/cx was strongly associated with p-c-Jun and NF-κBp65 (r=0.53, P<0.0001, n=93; r=0.35, P<0.0001, n=176). This study shows that a range of ERβ isoform expression occurs in ERα-negative breast tumours. While expression of ERβ1, total and ERβ2/cx are correlated, individual forms show associations with certain phenotypes that suggest different roles in subsets of ERα-negative cancers. Based on our in vivo observations, ERβ may have the potential to become a therapeutic target in the specific subcohort of ERα-negative breast cancers.
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