CYP3A4甲基化对塔克罗利木斯药理动学的影响
Karel K M Koudijs1, Oumaima Etsouli1, Costanza L Vallerga2
1Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, the Netherlands.
在CYP3A4的遗传变异解释了小的塔克罗利斯的变化. 这项研究发现增加的CYP3A4基因甲基化与更高的药物水平相关,解释了18%的药物动力学变化.
科学领域:
- 药物基因组学 药物基因组学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 药物新陈代谢 药物新陈代谢
背景情况:
- 在CYP3A4中常见的遗传变异解释了TACROLIMUS清除的有限变异性.
- 这项研究调查了CYP3A4基因甲基化对塔克罗利斯药物动力学变化的作用.
研究的目的:
- 探索CYP3A4基因甲基化在多大程度上解释了塔克罗利斯的药理动力学变异性.
- 为了确定与塔克罗利斯水平相关的CYP3A4基因内的特定甲基化位点.
主要方法:
- 分析了23名移植后患者的剩余肝脏组织,这些患者符合塔克罗利斯稳定状态的具体标准.
- 针对CYP3A5表达的患者和捐赠者的基因定型,不包括CYP3A5表达者.
- 使用Illumina Infinium甲基化EPIC阵列对肝脏活检组织进行甲基化分析.
主要成果:
- 在CYP3A4基因区域的特定探针 (cg19046783) 的甲基化增加与剂量正常化的AUC0-24h正相关 (斯皮尔曼的rho = 0.52,P = 0.01).
- 这种单一的甲基化探针解释了剂量正常化的AUC0-24h变化的18%.
- 探头cg19046783显示了分析的探头中最低的平均甲基化和最高的生物变异.
结论:
- 增加CYP3A4基因区域探针cg19046783的甲基化与增加的塔克罗利斯剂量正常化的AUC0-24h相关.
- CYP3A4基因甲基化,特别是cg19046783的甲基化,显著促进了塔克罗利的药物动力学变异性,解释了18%的观察到的变化.
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