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Updated: Feb 8, 2026
05:46
A Proinflammatory, Degenerative Organ Culture Model to Simulate Early-Stage Intervertebral Disc Disease.
Published on: February 14, 2021
4.2K
TRPC6 in simulated microgravity of intervertebral disc cells
Alfredo Franco-Obregón1,2, Elena Cambria3, Helen Greutert3
1Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
Summary
Simulated microgravity and TRPC channel blockers reduce intervertebral disc cell proliferation and increase senescence. TRPC6 expression is downregulated by microgravity, suggesting a role in disc degeneration.
Area of Science:
- Biomedical research
- Cell biology
- Space medicine
Background:
- Prolonged bed rest and microgravity induce intervertebral disc (IVD) degeneration.
- Molecular mechanisms of IVD degeneration under microgravity are not fully understood.
- Transient receptor potential canonical (TRPC) channels are involved in mechanosensing but are understudied in IVDs.
Purpose of the Study:
- Investigate the role of TRPC channels in IVD cell response to simulated microgravity.
- Examine the effects of TRPC channel inhibition on IVD cell proliferation, cell cycle, and senescence.
- Analyze TRPC channel expression in IVD cells under simulated microgravity.
Main Methods:
- Primary human IVD cells (annulus fibrosus and nucleus pulposus) were cultured.
- Cells were exposed to simulated microgravity and a TRPC channel inhibitor (SKF-96365).
- Proliferation, cell cycle distribution, senescence, and TRPC channel expression were analyzed.
Main Results:
- Both simulated microgravity and TRPC channel inhibition reduced IVD cell proliferation.
- Simulated microgravity and TRPC channel inhibition induced IVD cell senescence.
- Simulated microgravity led to the downregulation of TRPC6 expression.
Conclusions:
- TRPC channel inhibition and simulated microgravity negatively impact IVD cell health.
- TRPC6 downregulation under simulated microgravity suggests its involvement in IVD degeneration.
- TRPC6 may be a potential therapeutic target for preventing or treating IVD degeneration caused by microgravity.
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