What the study found
The study found measurable changes in intracellular viscosity in HeLa cells exposed to hypergravity. It also indicates that Single-Particle Tracking (SPT), a method that follows particles inside cells, can be used to measure this effect.
What the authors say this matters
The authors frame this as relevant because intracellular viscosity affects biochemical diffusion rates, and altered cell behavior in changed gravity may contribute to the symptoms seen in astronauts. The study suggests this pilot work supports the ESA MechanoCell project.
What the researchers tested
The researchers conducted a pilot study on HeLa cells exposed to hypergravity ranging from 1 to 12 g in the Large Diameter Centrifuge at ESA ESTEC. They used SPT analysis software with an EVOS microscope to track endogenous particles in the cells, then calculated mean square displacement and intracellular viscosity from the particle trajectories.
What worked and what didn't
The approach produced trajectories of endogenous particles from which mean square displacement and viscosity could be calculated. The results indicate measurable viscosity changes under hypergravity, but the abstract says further research is needed to confirm the findings and account for other influencing factors.
What to keep in mind
This is described as a pilot study, so the findings are preliminary. The abstract does not provide detailed limitations beyond noting that more research is needed and that other influencing factors must be considered.
Key points
- Hypergravity exposure was associated with measurable changes in intracellular viscosity in HeLa cells.
- Single-Particle Tracking (SPT) was used to track endogenous particles inside cells and estimate viscosity.
- The experiments covered hypergravity levels from 1 to 12 g in the Large Diameter Centrifuge at ESA ESTEC.
- The abstract says further research is needed to confirm the findings and assess other influencing factors.
Disclosure
- Research title:
- Hypergravity was linked to measurable changes in HeLa cell viscosity
- Authors:
- Sharon van Rijthoven, Thomas Schmidt, Jack J. W. A. van Loon
- Institutions:
- Academic Center for Dentistry Amsterdam, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Delft University of Technology, Leiden University, European Space Research and Technology Centre
- Publication date:
- 2026-04-21
- OpenAlex record:
- View
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