Blood:DHFR和FPGS胚系突变对甲氨蝶呤代谢和ALL复发风险的影响

2020-06-07 QQY MedSci原创

DHFR的胚系突变与高水平的短链甲氨蝶呤聚谷氨酸有关; FPGS的胚系突变与长链甲氨蝶呤聚谷氨酸积累受损和复发风险增加有关。

甲氨蝶呤(MTX)维持治疗对治疗急性淋巴细胞白血病(ALL)至关重要,但药物配置时,要达到个体间差异性的适当治疗剂量仍是一个挑战。

为了评价与MTX代谢相关的遗传因素,研究人员对“Nordic Society for Paediatric Haematology and Oncology ALL2008”研究中的447例ALL病例进行全基因组关联分析,并在另外一个独立的包含196例患者的队列中进行验证。

结果发现,位于DHFR基因调控原件上的一个基因间SNP(rs1382539)因可抑制增强子活性而与短链甲氨蝶呤聚谷氨酸的水平升高有关;而FPGS上的rs35789560(p.R466C)可通过减弱催化活性与长链甲氨蝶呤聚谷氨酸水平降低有关。此外,FPGS变异还与ALL复发风险增加有关。

综上所述,本研究结果揭示了ALL患者间对甲氨蝶呤治疗反应差异的遗传基础,或可有助于改进未来的给药算法

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    2020-06-09 膀胱癌
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