Lancet Oncol:激素受体表达状态可用于预测特定亚型卵巢癌患者的生存期

2013-07-18 echo1166 dxy

目前,能预测卵巢癌患者预后的生物标记物几乎没有,这部分是由于当前进行的研究并未对纳入患者的组织病理学亚型有所区分,这可能会掩盖某些生物标记物与卵巢癌亚型之间存在的特异性联系。为了确定肿瘤中黄体激素受体(PR)和雌激素受体(OR)的表达与特定亚型卵巢癌的预后之间可能存在的联系,科学家设计了相关研究,并将其结果发表在Lancet Oncol 7月最新的在线期刊上。研究纳入的数据来自12项研究,研究者从

目前,能预测卵巢癌患者预后的生物标记物几乎没有,这部分是由于当前进行的研究并未对纳入患者的组织病理学亚型有所区分,这可能会掩盖某些生物标记物与卵巢癌亚型之间存在的特异性联系。为了确定肿瘤中黄体激素受体(PR)和雌激素受体(OR)的表达与特定亚型卵巢癌的预后之间可能存在的联系,科学家设计了相关研究,并将其结果发表在Lancet Oncol 7月最新的在线期刊上。

研究纳入的数据来自12项研究,研究者从中获取了组织微数列数据和临床相关数据。

本研究中所纳入的受试者为卵巢侵袭性浆液性、粘液性和内膜样肿瘤或透明细胞癌的患者。符合入组标准的受试者还需要同时具备组织微数列数据、临床随访数据、确诊时的年龄、肿瘤级别和分期相关数据。临床数据的获得来自于医疗记录、肿瘤注册信息、死亡证明、病理报告和组织学切片的结果回顾。

研究者采用免疫组化分析的方法来确定肿瘤组织中黄体激素受体(PR)和雌激素受体(OR)的表达状态,对此进行评估的病理学家并不知道相关临床信息。研究者根据染色的程度将黄体激素受体和雌激素受体的表达情况分为阴性(肿瘤细胞核<1%)、弱阳性(肿瘤细胞核介于1%至50%)或强阳性((肿瘤细胞核在50%及以上)。最后研究者评估了疾病生存期和激素受体表达状态之间存在的联系。

本研究共纳入2933名浸润性上皮卵巢癌患者:其中1742人为晚期的浆液性肿瘤、110人为早期的浆液性肿瘤、207人为粘液性肿瘤、484人为内膜样肿瘤、390人为透明细胞癌。

在内膜样肿瘤患者和高级别的浆液性肿瘤患者中,研究者发现PR表达与疾病特生存期相关,上述结果皆具有统计学意义。在内膜样肿瘤患者中,ER表达与疾病生存期的改善相关,结果具有显著统计学意义。

研究者并未观察到在粘液性肿瘤、透明细胞癌和低级别的浆液性肿瘤患者中,存在特异的相关性。在内膜样肿瘤患者中,与激素受体表达阴性相比,激素受体表达阳性(PR或ER染色为弱阳性、强阳性或两者共存)与疾病生存期的改善显著相关,并且这种相关性不受到研究地点、患者的年龄、疾病分期和肿瘤级别的影响,差异具有显著统计学意义。在晚期浆液性肿瘤患者中,PR强表达与疾病特异性生存期的改善相关,而PR弱表达与其不存在相关性。

本研究结果指出,在内膜样肿瘤和晚期浆液性卵巢肿瘤患者中,PR和ER的表达情况是与预后相关的预测标记。但是我们在临床研究中需要对肿瘤的亚型和生物标记的状态进行分层研究,以期确定激素受体表达状态是否能预测患者对内分泌治疗的反应情况,以及上述这两种激素受体表达状态是否能对卵巢肿瘤患者个体化治疗方案的制定起指导作用。


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    2014-02-20 minlingfeng
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