探索人体ABCG2中细胞内循环1遗传变异对运输活动和蛋白质丰度的影响
Noora Sjöstedt1, Ritchie G M Timmermans1, Marika Vieraankivi1
1Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland.
Drug metabolism and pharmacokinetics
|April 9, 2025
概括
影响药物处置的蛋白质ABCG2的遗传变异可以改变药物暴露. 在ABCG2细胞内循环1中的单核酸变体 (SNV) 可能对蛋白质活性和丰度产生不可预测的影响.
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
- 药物运输器研究研究 药物运输器研究
背景情况:
- ABCG2 (乳腺癌抗性蛋白,BCRP) 在药物处置中起着至关重要的作用.
- 在ABCG2的遗传变异可以显著改变一个人的药物暴露和反应.
- 在ABCG2的细胞内循环1 (ICL1) 包含一个对蛋白质功能至关重要的合螺旋.
研究的目的:
- 研究ABCG2的细胞内循环1 (ICL1) 中单核酸变体 (SNV) 对蛋白质功能的影响.
- 确定SNV的组合是否可以影响ABCG2活动和蛋白质丰度.
- 评估ICL1变体的基质依赖的运输活动.
主要方法:
- 在HEK293细胞中表达野生型和变异ABCG2蛋白 (包括常见的SNV和ICL1变异).
- 使用膜囊泡分析基质运输 (露西弗黄色,硫酸,罗斯瓦斯塔丁).
- 量化ABCG2蛋白质的丰富性.
主要成果:
- 大多数ICL1变种 (K453R,I456V,H457R,G462R/V) 与参考ABCG2.2相比显示蛋白质丰度发生变化.
- 运输活动取决于基质;然而,大多数ICL1变体至少对一个基质表现出类似的运输.
- 双重替代表明,I456V对运输和丰度的影响比H457R更为一致.
结论:
- 在ABCG2的ICL1内的SNV可以对蛋白质活性产生有害和有益的影响.
- ABCG2变种的功能后果,特别是组合,是复杂的,难以预测的.
- 了解这些变异对于个性化医疗和优化药物治疗至关重要.
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