M6A减轻了与FUS相关的ALS颗粒
Gaia Di Timoteo1, Andrea Giuliani1, Adriano Setti1
1Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, Rome, 00185, Italy.
Nature communications
|June 12, 2024
概括
降低RNA N6-甲基氨酸 (m6A) 水平,可以减少异位性侧面硬化症 (ALS) 模型中的病理性FUS蛋白内含. 这表明针对m6的平衡可能为ALS提供了一种新的治疗策略.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 肌缩性侧面硬化症 (ALS) 涉及运动神经元退化和细胞质内含的形成,这些内含来自像FUS.这样的突变蛋白质.
- RNA N6-甲基氨酸 (m6A) 修饰在细胞过程中发挥作用,但其在ALS病变发生中的具体参与尚未完全理解.
研究的目的:
- 调查m6A内容在ALS中FUS诱导的内含的形成和溶解中的作用.
- 探索针对ALS治疗干预的m6A途径的潜力.
主要方法:
- 使用的神经元细胞和诱导多能干细胞 (iPSC) 衍生的发动神经元表达突变FUS.
- 操纵了m6ARNA含量,并分析了FUS内含物的数量和溶解率.
- 在ALS条件下检查了压力颗粒的转录组.
- 用METTL3抑制剂STM-2457.7治疗患者衍生的纤维细胞.
主要成果:
- 减少m6A含量显著降低了FUS含量的数量,并加速了神经细胞和iPSC衍生的运动神经元中的FUS含量溶解.
- 病情改变了压力颗粒的转录组,在下调后正常化.
- 表达突变FUS的细胞表现出更高的m6A水平,表明m6A平衡与聚合物形成之间的潜在联系.
- 用METTL3抑制剂STM-2457的治疗减少了患者衍生纤维细胞中的FUS入.
结论:
- 降低的m6A水平有效地抵消ALS细胞模型中的病态FUS聚合物形成.
- m6 在ALS的发病过程中涉及到平衡,这表明它是潜在的治疗标.
- 抑制METTL3在减少FUS入方面表现有前途,为ALS治疗提供了潜在的治疗途径.
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