Clin Infect Dis:肺结核,探索利福平更佳剂量

2018-07-18 吴星 环球医学

肺结核仍然是巨大的公共卫生问题,延长治疗时间阻碍了肺结核的有效控制。较高的利福平剂量与更好的杀菌活性相关,但是最佳剂量未知。2018年6月,发表在《Clin Infect Dis》的一项研究调查了肺结核患者利福平血药暴露水平和6个月治疗应答之间的相关性。

肺结核仍然是巨大的公共卫生问题,延长治疗时间阻碍了肺结核的有效控制。较高的利福平剂量与更好的杀菌活性相关,但是最佳剂量未知。2018年6月,发表在《Clin Infect Dis》的一项研究调查了肺结核患者利福平血药暴露水平和6个月治疗应答之间的相关性。

目的:本分析旨在一项调查高剂量利福平缩短治疗的潜力的近期研究中,描述利福平血药暴露和6个月治疗应答之间的相关性。

方法:研究人员分析了336名接受10、20或35mg/kg利福平治疗的肺结核患者数据(97人具有药物代谢动力学数据)。应答测量为稳定痰培养转化时间(TSCC)。研究人员使用之前开发的利福平群体药物代谢动力学模型推导出个体暴露参数。TSCC使用参数化时间至事件方法建模,并且进行顺序暴露-响应分析。

结果:较高的利福平暴露会增加早期痰培养转化的概率。观察范围内未检测到最大效应极限。8周时,液体培养基确定的稳定痰培养转化的患者比例的预期值为从39%(95% CI,37%~41%)增加到55%(49%~61%),利福平曲线下面积从20 mg/Lh增加到175mg/Lh(分别代表10 mg/kg和35mg/kg)。其他TSCC的预测因素为基线细菌负荷、培养结果不可用的比例、乙胺丁醇换药为莫西沙星或SQ109。

结论:增加利福平暴露会缩短TSCC,该影响并不封顶,表明>35mg/kg的剂量可能更有效。临床中,优化利福平剂量的同时预防毒性应优先考虑。

原始出处:

Svensson EM, Svensson RJ, Te Brake LHM, et.al. The Potential for Treatment Shortening With Higher Rifampicin Doses: Relating Drug Exposure to Treatment Response in Patients With Pulmonary Tuberculosis.Clin Infect Dis. 2018 Jun 18;67(1):34-41. doi: 10.1093/cid/ciy026.

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    2018-07-19 mswert122

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    2018-07-19 衣带渐宽

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