CCP:研究发现阿法替尼群体药代动力学新模型

2014-05-05 秀荣 医学论坛网

德国学者研究设计了一个群体药代动力学模型,对阿法替尼在不同癌症人群中药代动力学进行了准确描述。该模型可被用于对各种协变量效应和可能的剂量调整进行模拟研究;各个协变量的效应大小并不具有临床相关性。论文2014年4月1日在线发表于《癌症化疗与药理学》(Cancer Chemotherapy and Pharmacology)杂志。研究对来自7个II期或III期研究中的927例晚期实体瘤患者(4460份

德国学者研究设计了一个群体药代动力学模型,对阿法替尼在不同癌症人群中药代动力学进行了准确描述。该模型可被用于对各种协变量效应和可能的剂量调整进行模拟研究;各个协变量的效应大小并不具有临床相关性。论文2014年4月1日在线发表于《癌症化疗与药理学》(Cancer Chemotherapy and Pharmacology)杂志。

研究对来自7个II期或III期研究中的927例晚期实体瘤患者(4460份血浆浓度数据)的资料进行分析;给予这些患者口服阿法替尼连续3或4周(开始剂量为20、40 或50mg,每天一次)。使用非线性混合效应建模的方法,对长达7个月的剂量血浆浓度-时间数据进行分析。

结果为,一级吸收、线性消除式二室模型可对阿法替尼的药代动力学特征进行详尽描述。随着剂量的增加,暴露水平的比例性增长稍微较高,这可被剂量依赖的相对生物利用度所解释。在治疗剂量为40mg的情况下,所估算的稳定期表观总清除率和分布容积分别为734 mL/min和2,370 L。食物摄取、体重、性别、美国东部肿瘤协作组织性能评分、肾功能和碱性磷酸酶、乳酸脱氢酶或总蛋白水平等都是影响阿法替尼暴露水平的、具有显著统计学意义的协变量,但这些因素所造成的典型患者的暴露比例性增长水平都不高于模型极值的27.8%(连续协变量的基线值为2.5%和97.5%)。单个协变量效果的模拟研究显示,这些变量都没有引起超过所观察到的阿法替尼变异性范围(90 %预测区间)的典型特征变化。

原始出处:


Freiwald M1, Schmid U, Fleury A, Wind S, Stopfer P, Staab A.Population pharmacokinetics of afatinib, an irreversible ErbB family blocker, in patients with various solid tumors.Cancer Chemother Pharmacol. 2014 Apr;73(4):759-70. doi: 10.1007/s00280-014-2403-2. Epub 2014 Feb 13.

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    2015-01-04 fengyqf
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    2014-11-11 xjy13
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