微重力对心肌细胞结构和功能的影响
Luis Fernando González-Torres1, Daniela Grimm1,2,3, Marcus Krüger1,2
1Department of Microgravity and Translational Regenerative Medicine, Otto-von-Guericke University, 39106 Magdeburg, Germany.
Biomolecules
|September 27, 2025
概括
太空飞行和微重力改变心脏细胞功能,影响的处理,新陈代谢和收缩性. 三维模型显示出有希望的结果,而二维模型揭示了心肌细胞中压力诱导的功能障碍.
科学领域:
- 心血管生理学心血管生理学
- 空间生物学 空间生物学
- 细胞生物学 细胞生物学
背景情况:
- 太空飞行和微重力引发显著的心血管变化,影响心脏结构和功能.
- 了解这些影响对于宇航员健康和太空组织工程至关重要.
- 心肌细胞是心脏功能的核心,并且受到微重力直接影响.
研究的目的:
- 审查和分析了30多年的微重力对心肌细胞影响的研究.
- 在微重力研究中确定一致的发现和模型依赖的结果.
- 综合有关心肌细胞因太空飞行而发生的细胞和分子变化的知识.
主要方法:
- 在五个数据库中进行全面的文献搜索.
- 在真实或模拟的微重力条件下对心脏细胞进行62项符合条件的研究的分析.
- 收集和综合有关心肌细胞对微重力反应的数据.
主要成果:
- 在Ca2+处理,新陈代谢,收缩性和基因表达中报告了一致的变化.
- 三维人类诱导的多能干细胞衍生心肌细胞 (HiPSC-CM) 模型显示了增强的成熟和增殖.
- 二维模型主要表现出与压力相关的功能障碍;体内模型证实了结构和功能性心脏重塑.
结论:
- 微重力暴露始终诱导细胞和分子心脏变化.
- 心脏模型,微重力平台和暴露时间的选择对研究结果产生了重大影响.
- 需要使用HiPSC-CMs等先进模型进行进一步的研究,以了解和减轻微重力对心脏的影响.
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