Effects of microgravity on neural crest stem cells.
Yilin Han1, Povilas Barasa2, Lukas Zeger1
1Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden.
Frontiers in Neuroscience
|April 25, 2024
Summary
Microgravity exposure enhances neural stem cell proliferation and survival by upregulating Zfp462. Delayed sample collection alters exosome content, but microgravity
Area of Science:
- Space biology
- Cellular biology
- Neuroscience
Background:
- Microgravity (μg) induces systemic changes but may offer cellular benefits.
- Previous studies showed increased proliferation in neural stem cells after spaceflight.
- The specific effects of μg versus hypergravity required further investigation.
Purpose of the Study:
- To determine the effects of microgravity on boundary cap neural crest stem cells (BCs).
- To investigate the role of Zfp462 transcription factor in μg-induced cellular changes.
- To analyze the impact of delayed specimen harvesting on gene expression and exosome content.
Main Methods:
- Exposing BCs to μg and 1g conditions simultaneously onboard a sounding rocket (MASER15).
- Analyzing gene expression and exosome microRNA content in harvested cells.
- Comparing results with previous experiments (MASER14) involving delayed specimen collection.
Main Results:
- μg-exposed BCs showed significantly increased proliferation compared to 1g controls.
- Zfp462 transcription factor was upregulated in μg-exposed BCs harvested 5 hours post-flight.
- Delayed specimen harvesting (MASER14) altered gene expression patterns and exosome microRNA content compared to immediate harvesting (MASER15).
Conclusions:
- Short-term μg exposure enhances BC proliferation and survival, with lasting effects.
- Zfp462 upregulation is a key mechanism in μg-induced neural stem cell changes.
- Delayed sample collection can modify molecular profiles, potentially attenuating direct μg effects while other impacts persist.
