发现新的生殖系遗传变异,与DPYD内外的严重胺相关毒性有关
Jonathan E Knikman1, Qinglian Zhai2, Carin A T C Lunenburg3
1Division of Pharmacology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
Genome medicine
|August 15, 2024
概括
这项研究研究了除DPYD之外的其他遗传变异,以解释严重的胺毒性. 虽然没有发现新的重大变异,但建议在更大,多样化的队列中进行进一步研究,以进行个性化风险评估.
科学领域:
- 药物基因组学 药物基因组学
- 临床遗传学 临床遗传学
- 在瘤学瘤学.
背景情况:
- 阿尔佩-DPD研究表明,DPYD基因定型可以降低胺的毒性,但不能消除它.
- 这凸显了需要确定导致严重毒性的其他遗传因素的必要性.
研究的目的:
- 识别DPYD基因内外的新型遗传变异,与严重的胺毒性相关.
- 改善在接受胺治疗的患者中预测和预防药物不良反应.
主要方法:
- 使用了来自Alpe-DPD研究的生物样本和数据.
- 进行DPYD外测序和in silico/in vitro分析以进行变种分类.
- 进行了全基因组关联研究 (GWAS),以确定与毒性相关的超DPYD变异.
主要成果:
- 检测到24个DPYD变异,其中7个预测是有害的;载体显示出对增加毒性风险的非显著趋势.
- GWAS确定了五种暗示变异 (P <5x10^-6),但没有单个核酸多态性达到全基因组意义.
- 在这个队列中,没有其他遗传变异被确定为严重胺毒性的主要贡献者.
结论:
- 目前,针对单个标记物的种群级遗传测试在预防所有胺毒性方面具有有限的临床效用.
- 在个体水平上识别额外的变异仍然是解释严重毒性的有希望的策略.
- 需要进行更大,更多样化的研究,以发现针对个性化胺治疗的临床相关遗传变异.
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