JCO:低剂量他莫昔芬预防乳腺上皮内瘤变复发:随机安慰剂对照试验

2019-04-12 海北 MedSci原创

他莫昔芬以20 mg/d的剂量给药5年,对乳腺癌的治疗和预防有效,但毒性限制了其广泛使用。生物标志物试验显示,在减少乳腺癌增殖中,5mg / d的效果不低于20mg / d。

他莫昔芬以20 mg/d的剂量给药5年,对乳腺癌的治疗和预防有效,但毒性限制了其广泛使用。生物标志物试验显示,在减少乳腺癌增殖中,5mg / d的效果不低于20mg / d。

因此,研究人员提出假设,较短时间给予较低剂量可有效预防乳腺上皮内瘤变复发,但毒性低于标准剂量。

研究人员对患有激素敏感或未知乳腺上皮内瘤变的女性(包括非典型导管增生和原位小叶或导管癌)进行了一项多中心随机试验,其中包括他莫昔芬,5 mg / d,或安慰剂治疗3年。主要终点是浸润性乳腺癌或原位导管癌的发病率。

该研究包括了500名75岁或以下的女性。中位随访5.1年(四分位数间距3.9-6.3年)后,他莫昔芬治疗组有14例肿瘤事件,而安慰剂组有28例(11.6 v 23.9 / 1000人年;危险比,0.48;;95%CI,0.26至0.92;P = .02)。

他莫昔芬使对侧乳房事件减少75%(3个vs 12个事件;风险比,0.25; 95%CI,0.07至0.88;P = .02)。

除了使用他莫昔芬的每日潮热频率略有增加外,患者报告的结果在两组之间没有差异(P = .02)。他莫昔芬有12例严重不良事件,安慰剂组有16例,其中他莫昔芬组的1例为深静脉血栓形成,1例为子宫内膜癌,安慰剂组为1例肺栓塞。

因此,使用5mg / d的他莫昔芬3年可以在有限的毒性范围内,使乳腺上皮内瘤变复发减半,这为这些疾病提供了新的治疗选择。


原始出处:

DeCensi A et al. Randomized Placebo Controlled Trial of Low-Dose Tamoxifen to Prevent Local and Contralateral Recurrence in Breast Intraepithelial Neoplasia. JCO, 2019; doi: 10.1200/JCO.18.01779.


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    2020-03-10 lidong40
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    2019-08-11 amyloid
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2018年1月,临床药物基因组学实施联盟(CPIC)发布了CYP2D6和他莫昔芬治疗指南,本文主要总结了来自文献的相关证据并针对基于CYP2D6基因型的他莫昔芬治疗提出相关建议。

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他莫昔芬(Tamoxifen)是一款经FDA批准用于治疗乳腺癌的药物。日内瓦大学联合法国斯特拉斯堡大学的研究人员近日发现,他莫昔芬大大抑制了一种严重的遗传疾病——肌管性疾病的发展。不仅如此,动物模型研究还显示,经该药治疗后小鼠的预期寿命延长了7倍!