SABCS:他汀类药物或可改善炎性乳腺癌PFS

2012-12-18 SABCS SABCS

       一项大规模的回顾性研究显示:有他汀类药物服用史的炎性乳腺癌患者的肿瘤生长更为缓慢。        在第35届圣安东尼奥乳腺癌论坛(SABCS)上,来自美国德克萨斯大学MD安德森癌症中心的Naoto Ueno博士表示:他汀类药物的使用可显著改善炎性乳腺癌患者的无进展生存期(PFS),分析不同类型的

       一项大规模的回顾性研究显示:有他汀类药物服用史的炎性乳腺癌患者的肿瘤生长更为缓慢。

       在第35届圣安东尼奥乳腺癌论坛(SABCS)上,来自美国德克萨斯大学MD安德森癌症中心的Naoto Ueno博士表示:他汀类药物的使用可显著改善炎性乳腺癌患者的无进展生存期(PFS),分析不同类型的他汀类药物发现,只有亲水性他汀类药物可获得以上结果。

       服用亲水性他汀类药物的炎性乳腺癌的中位PFS约为5年,相比而言,服用亲脂性他汀类药物的患者中位PFS为2.47年,而未服用过他汀类药物的患者中位PFS仅为1.76年。虽然他汀类药物的服用未改善总生存期(OS),但与不使用他汀类药物相比,可将疾病特异性生存时间(DSS)延长6个月。

       Ueno博士指出,该研究进一步证实他汀类药物可改善乳腺癌风险或结局,但是在乳腺癌治疗中的潜在作用还不能肯定。欧洲的一个研究小组曾发表论文指出他汀类药物可降低乳腺癌发生风险,我们也进行了相关研究,但是没有采取前瞻性的、随机的研究方法,而是对服用或未服用他汀类药物的特定人群进行了分析。

       他汀类药物主要用于脂质代谢紊乱的治疗,现在发现其具有包括抗炎作用在内的多种药效,这使人们推测他汀类药物或可使某些类型的癌症患者获益。而可溶性不同(亲水型或亲脂型)的他汀类药物或许有不同的作用,丹麦的一项研究发现亲脂型他汀类药物可显著降低乳腺癌的复发风险(J Natl Cancer Inst. 2011; 103: 1461-1468)。

       炎性乳腺癌是一种罕见但极具侵略性的恶性肿瘤,由肿瘤细胞转移,最终堵塞淋巴管而引起继发炎症。Ueno博士和他的同事们猜测他汀类药物或可改善炎性乳腺癌患者的疾病结局。

       研究人员评估了724例1995—2011年间在MD Anderson癌症中心诊断和治疗的III期炎性乳腺癌患者。分析了是否服用他汀类药物及不同类型他汀类药物患者的疾病结局,研究的主要终点是PFS,次要终点是DSS和OS。

       分析显示,服用亲水型他汀类药物的患者各个生存指标都有明显优势,中位数值分别是:

       PFS:4.88年(亲水型),2.47年(亲脂型),1.76(未服用),P=0.04
       DSS:5.10年(亲水型),3.79年(亲脂型),4.52年(未服用)
       OS:5.05年(亲水型),3.79年(亲脂型),4.32年(未服用)

       在调整放疗、激素受体状态、HER2表达、亲水型他汀类药物的治疗史后进行的多变量分析显示,亲水型他汀类药物可将疾病进展风险降低51%(HR 0.49, P<0.01)。

       调整患者的一年内的淋巴结浸润情况、病理核级和外科治疗情况等参数,统计模型得出结论是:与未使用他汀类药物相比,亲水型他汀类药物的使用可将死亡率降低20%,疾病特异性死亡率降低15%,两个指标无统计学意义。

       Ueno博士指出丹麦的研究对象并未局限于炎性乳腺癌患者,但对于两次研究结果的差异未作解释,需要进行随机临床试验研究他汀类药物对乳腺癌结局的影响。

       尽管该研究评估了亲水型和亲脂型他汀类药物的不同作用,但是研究人员认为对癌症治疗有效的将会是具体的某个药物,辛伐他汀或阿托伐他汀。Ueno研究小组正在设计一项随机临床试验,以评估两种他汀类药物对乳腺癌复发和OS影响。

SABCS相关的拓展阅读:


       编译自:Statins May Slow Inflammatory Breast Cancer.MedPage Today. December 10, 2012

       文献来源:Statin use and improved survival outcome in primary inflammatory breast cancer: Retrospective cohort study.SABCS 2012

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    2012-12-19 jeanqiuqiu
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