维生素B2和B3营养基因组学揭示了对NAXD疾病的治疗方法
Ankur Garg1, Skyler Y Blume1, Helen Huynh2
1Gladstone Institutes, San Francisco, CA 94158, USA; Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94158, USA.
Cell
|February 26, 2026
概括
这项研究引入了一个营养基因组学框架,以发现可以用维生素治疗的疾病. 它将NAXD确定为关键酶,显示维生素B3补充剂在相关的小鼠模型中显著延长寿命.
科学领域:
- 营养基因组学 营养基因组学
- 生物化学 生物化学
- 神经科学是一个神经科学.
背景情况:
- 维生素是必不可少的外部代谢物,通常在没有具体指导的情况下消耗.
- 单一性疾病可以受到微量营养素水平的影响.
- 需要一种系统的方法来将遗传疾病与维生素疗法联系起来.
研究的目的:
- 开发一个营养基因组学框架,用于识别可通过微量营养素调制治疗的疾病.
- 通过使用CRISPR技术,选响应维生素B2和B3水平的基因.
- 为了研究NAD(P) HX脱水酶 (NAXD) 在神经发育疾病中的作用.
主要方法:
- 在不同的维生素B2和B3条件下,全基因组的CRISPR选.
- 使用了Naxd淘汰赛 (KO) 鼠标模型.
- 采用空间代谢学,单核RNA测序 (snRNA-seq) 和组织学.
主要成果:
- 确定了许多对维生素有反应的候选疾病基因,其中NAXD是维生素B3的首选.
- 纳克斯德KO小鼠表现出NADHX积累,NAD+耗尽,以及大脑中的血清蛋白生物合成受损.
- 皮层和脑内皮质细胞被确定为脆弱的细胞类型.
- 维生素B3补充剂在Naxd KO小鼠中延长了40倍以上的寿命,而缺乏症加速了病理学.
结论:
- 为精准医学建立了一个新的营养基因组学框架.
- 证明了NAXD在预防神经发育疾病中的关键作用.
- 强调了针对性维生素B3干预措施的显著治疗潜力.
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