维生素B12可以通过脂重塑来缓解结合体病变
Adam Antebi1, Wenming Huang1, Jonathan Kölschbach1
1Max Planck Institute for Biology of Ageing.
Research square
|December 3, 2025
概括
由PUF60突变引起的Verheij综合征扰乱了单碳代谢和脂合成. 维生素B12 (VB12) 补充剂通过恢复代谢平衡和生长来挽救这些缺陷,提供了一个潜在的治疗策略.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 结合体功能障碍会影响细胞代谢,但与代谢重新连接的联系尚不清楚.
- 维雷伊氏综合征 (VRJS) 是一种罕见的疾病,与拼接因子PUF60.0的突变有关.
- 了解这些联系对于罕见疾病研究至关重要.
研究的目的:
- 在VRJS中研究RNA剪接缺陷和代谢重新连接之间的机制联系.
- 确定受PUF60缺乏影响的分子通路.
- 探索VRJS的潜在治疗干预措施.
主要方法:
- 使用了 *Caenorhabditis elegans* 模型,人类细胞系,以及来自患者的样本.
- 分析基因拼接模式,重点关注单碳代谢和脂重塑.
- 评估了S-adenosylmethionine (SAM) /S-adenosylhomocysteine (SAH) 的循环和mTORC1的信号传递.
主要成果:
- 缺少PUF60会破坏参与单碳代谢和脂重塑的基因的拼接.
- 观察到SAM/SAH循环和酸丁胆合成受损,引发综合应激反应并损害mTORC1信号.
- 维生素B12 (VB12) 补充恢复了新陈代谢平衡,重新激活了mTORC1,并挽救了VRJS类表型.
- 内部保留*nhr-114/HNF4*被确定为生长缺陷的关键驱动因素,其拼接恢复抑制了这些表型.
结论:
- 在VRJS中建立了RNA剪接和脂质代谢之间的机制联系.
- 突出了VB12依赖的单碳代谢作为spliceosomopathies中的关键调节器.
- 建议VB12作为VRJS和相关疾病的潜在治疗策略.
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