米RNAs通过ECM和发育途径塑造了老鼠年龄独立的组织适应太空飞行
Friederike Grandke1,2, Shusruto Rishik1, Viktoria Wagner1,3
1Clinical Bioinformatics, Saarland University, Saarbrücken, Germany.
Nature communications
|February 5, 2026
概括
太空飞行改变了雌性小鼠在多个器官中的基因表达,影响了关键的代谢和免疫路径. 这些由microRNAs (miRNAs) 驱动的分子变化对于理解长期太空旅行效应至关重要.
科学领域:
- 太空生物学空间生物学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 了解太空飞行对哺乳动物的分子影响对于人类的行星间任务至关重要.
- 非编码RNAs,特别是microRNAs (miRNAs),在调节基因表达和细胞过程中起着重要作用.
研究的目的:
- 研究太空飞行对雌性小鼠的全生物分子效应,重点研究微RNA表达.
- 确定受太空飞行和年龄影响的特定途径和miRNA家族.
主要方法:
- 分析了来自雌性小鼠13个固体器官的686个小RNA样本.
- 对国际空间站 (ISS) 上至少3周暴露于太空飞行的小鼠与地球控制器进行比较.
- 评估3个月和8个月大小的小鼠样本.
主要成果:
- 与太空飞行相关的显著变化观察到组织重塑途径,特别是沿着脂肪-肝-胰腺轴,心脏,大脑,脏和胆髓.
- 确定了MIR-17/92和MIR-1/133小RNA家族是这些太空飞行诱导的分子变化的关键调节者.
- 年龄相关的变化,虽然不那么明显,但涉及到由MIR-8,MIR-154和MIR-15家族介导的中肠脂肪组织,胰腺和隔膜的组织重塑.
结论:
- 太空飞行对哺乳动物的基因表达和组织重塑有重大影响,特定miRNA家族具有不同的作用.
- 这些发现为长期太空探索所需的分子适应和潜在的对策提供了洞察力.
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