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Updated: Oct 5, 2025

Propagation of Dental and Respiratory Cells and Organs in Microgravity
Published on: May 25, 2021
Cells respond to space microgravity through cytoskeleton reorganization.
Xin-Tong Wu1, Xiao Yang1, Ran Tian1
1Key Laboratory for Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
Space microgravity causes cellular changes by disrupting the cytoskeleton (CSK). This review proposes a "cellular mechanical equilibrium" model explaining how gravity changes impact cell structure, function, and signaling pathways.
Area of Science:
- Cellular Biology
- Space Biology
- Biophysics
Background:
- Spaceflight studies confirm cells sense and respond to microgravity structurally and functionally.
- Mechanisms of microgravity perception, signal transduction, and biochemical conversion in single cells are not fully understood.
Purpose of the Study:
- To review cellular biology studies from real spaceflights.
- To propose a mechanism for cellular response to space microgravity based on cytoskeleton reorganization.
Main Methods:
- Summarized over 40 cellular biology studies from actual spaceflight missions.
- Focused on studies involving musculoskeletal, cardiovascular, and immune system cells.
Main Results:
- Cytoskeleton (CSK) reorganization is a key indicator of cellular response to space microgravity.
- Evidence suggests CSK reorganization precedes morphological and functional cellular changes.
Conclusions:
- A "cellular mechanical equilibrium" model is proposed to explain microgravity's effects.
- Gravitational changes disrupt CSK equilibrium, leading to altered cell mechanics, extracellular matrix, and signaling pathways, ultimately affecting cell function.
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