在体外鉴定功能下降的ABCB1基因变异的ABCB1基因变异
Laura Suominen1, Hatam Rashidpour1, Noora Sjöstedt1
1Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.
概括
在ABCB1载体中的遗传变异可以改变药物暴露. C717Y,L305P和V907F变种显著降低了ABCB1的运输功能,可能会影响药物分配和疗效.
科学领域:
- 药物基因组学 药物基因组学
- 分子生物学分子生物学
- 药物新陈代谢 药物新陈代谢
背景情况:
- ABCB1基因编码P-glycoprotein (P-gp),这是一个影响药物排放的关键排泄载体.
- 在ABCB1的遗传变异可以导致传送器功能减弱,可能增加药物暴露和改变治疗结果.
- 识别非功能性ABCB1变体对于预测药物反应和管理潜在的不良影响至关重要.
研究的目的:
- 研究ABCB1.1.中自然存在的非同义单核酸变体的运输活性.
- 为了识别可能影响药物处置的传输功能下降的新型ABCB1变异.
- 描述特定的ABCB1变体对已知的基质运输的功能影响.
主要方法:
- 在Sf9昆虫细胞中表达参考和变异的ABCB1载体蛋白.
- 从转染细胞中制备膜囊泡,用于输送试验.
- 使用囊泡制剂测量N-甲基胺 (NMQ) 和阿利斯基伦的运输动力学.
主要成果:
- 这种C717Y变种导致NMQ和阿利斯基伦运输的完全丧失.
- L305P和V907F变种将运输活动减少到不到参考值的25%.
- R580P和A980P变种减少了≤50%的运输,而S795C特别影响了NMQ运输.
结论:
- 在ABCB1变种C717Y,L305P和V907F中,运输功能显著减少或被取消.
- 携带这些变异的个体可能会经历ABCB1基质药物的药理动力学和药理动力学变化.
- 这些发现强调了特定的ABCB1基因变异在个性化医学和药物治疗管理中的临床相关性.
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