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综合性奥米克揭示了在机械卸载时在单细胞中由氨酸代作用驱动的亡抑制

Yi Ding¹, Fan Tong^1,2, Mingqiu Liu¹

¹State Key Laboratory of Medical Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, Beijing, 102206, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|August 18, 2025

概括

谷氨胺代谢是骨质细胞感知机械卸载的关键. 阻断谷氨胺吸收或其载体SLC1A5可增强单细胞亡,保持骨质,并提供潜在的骨质疏松症治疗方法.

科学领域:

骨生物学骨生物学
细胞力学细胞力学
代谢途径代谢途径

背景情况:

骨质细胞通过感知机械力来调节骨质量.
骨质细胞对机械刺激的反应机制尚未完全理解.

研究的目的:

为了阐明骨质细胞如何感知和响应机械卸载.
在机械应力下确定参与单细胞生存的分子通路.

主要方法:

来自后肢卸载 (HLU) 和对照小鼠的骨组织的综合多omics分析.
研究了谷氨胺 (Gln) 代谢及其载体SLC1A5在单细胞存活和亡中的作用.
检查了XIAP/Diablo轴在机械卸载下调节亡的作用.

主要成果:

细胞的代谢抑制了亡,使单细胞能够感知机械卸载.
Gln吸收对于单细胞在卸载过程中的生存至关重要; Gln剥夺或SLC1A5抑制会增加亡并减少骨质再吸收.
机械卸载上调XIAP,它将Diablo隔离到线粒体中,通过K63-无处不在化抑制细胞亡.
血清Gln水平与CTX相关,这表明Gln是骨质疏松症生物标志物.
缺乏GLN的饮食和SLC1A5抑制剂在HLU小鼠中保持了骨质.

结论:

骨质细胞代谢和XIAP/Diablo轴对于骨质细胞前体对机械卸载的反应至关重要.
准Gln代谢或SLC1A5为骨质疏松症和太空飞行诱导的骨质脱矿化等骨质损失疾病提供了一个有希望的治疗策略.

关键词:

在K63链路的无处不在.骨质再吸收骨质再吸收谷氨胺是一种内在亡途径的内在亡途径机械卸载机械卸载

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