在饮食限制下,OXR1维持逆转激素以延缓大脑衰老
Kenneth A Wilson1,2, Sudipta Bar1, Eric B Dammer3
1Buck Institute for Research on Aging, Novato, CA, 94945, USA.
Nature communications
|January 11, 2024
概括
饮食限制通过调节OXR1延长寿命,这是一种对蛋白质运输和神经元健康至关重要的基因. 随着年龄的增长,OXR1的下降会导致细胞缺陷,但恢复其功能可以促进寿命,并防止神经退行.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 衰老研究研究 衰老研究
背景情况:
- 已知饮食限制 (DR) 可以延缓衰老,但根本的分子机制尚未完全理解.
- 基因OXR1 (氧化抵抗1) 和它的同类mtd都与细胞应激反应有关.
研究的目的:
- 研究mtd/OXR1在衰老过程中的作用及其与饮食限制的联系.
- 阐明mtd/OXR1在维持细胞平衡和神经元健康方面的分子功能.
主要方法:
- 对Drosophila melanogaster中mtd多态的遗传分析及其对寿命和DR反应的影响.
- 研究mtd/OXR1与逆转激素复合体之间的相互作用.
- 评估mtd/OXR1功能丧失对蚊子和人类纤维细胞中蛋白质贩运和内分泌体功能的影响.
- 利用和人类的多原子分析,将Mtd/OXR1水平与衰老和神经疾病相关联.
- 使用模型来评估mtd/OXR1过度表达对与年龄相关的衰退和神经退行症的影响.
主要成果:
- 在mtd中的多态性影响了寿命和DR下的表达;成年敲击损害了女性DR介导的寿命延长.
- 随着年龄的增长,mtd/OXR1的表达会减少,其损失会破坏复原体的稳定,导致蛋白质贩运缺陷和内溶性体功能障碍.
- 逆转基因过度表达或用R55进行药理治疗,在mtd缺陷的中挽救了寿命和神经退行,并在患者衍生的纤维细胞中纠正了内分泌体缺陷.
- 降低mtd/oxr1水平与物种间的衰老和神经系统疾病有关.
- 在模型中,mtd/OXR1过度表达改善了与年龄相关的视力障碍和病.
结论:
- OXR1在维持逆转激素功能方面起着保留作用,这对细胞健康至关重要.
- OXR1对神经元健康和寿命至关重要,其下降有助于与年龄相关的细胞功能障碍和神经退行.
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