What the study found
The study found measurable changes in intracellular viscosity, which is the resistance of a cell's internal fluid to flow, in HeLa cells exposed to hypergravity. The authors also report that Single-Particle Tracking could be used to measure these changes.
Why the authors say this matters
The authors state that intracellular viscosity affects biochemical diffusion rates and note that changes in cellular viscosity have been observed in several human diseases. They suggest this pilot study is relevant for the European Space Agency's MechanoCell project and for understanding cell behavior in altered gravity.
What the researchers tested
The researchers used Single-Particle Tracking software to follow endogenous particles inside HeLa cells. The cells were exposed to hypergravity from 1 to 12 g in the Large Diameter Centrifuge at ESA ESTEC, and video frames from an EVOS microscope were used to calculate particle trajectories, mean square displacement, and then intracellular viscosity.
What worked and what didn't
The results indicate that viscosity changes were measurable under hypergravity conditions. The abstract does not provide detailed quantitative results, and it says further research is needed to confirm the findings and account for other influencing factors.
What to keep in mind
This was a pilot study in HeLa cells, so the abstract describes a limited initial test rather than a full validation. The summary also notes that other influencing factors were not fully addressed, and no additional limitations are described in the abstract.
Key points
- Intracellular viscosity in HeLa cells changed under hypergravity.
- Single-Particle Tracking was used to measure particle motion inside the cells.
- The experiment covered hypergravity levels from 1 to 12 g.
- Mean square displacement was used to estimate intracellular viscosity.
- The authors say more research is needed to confirm the findings.
Disclosure
- Research title:
- Hypergravity was linked to measurable viscosity changes in HeLa cells
- Authors:
- Sharon van Rijthoven, Thomas Schmidt, Jack J. W. A. van Loon
- Institutions:
- Academic Center for Dentistry Amsterdam, Academic Center for Dentistry Amsterdam, Amsterdam Neuroscience, Amsterdam Neuroscience, Delft University of Technology, European Space Research and Technology Centre, Leiden University, Vrije Universiteit Amsterdam, Vrije Universiteit Amsterdam
- Publication date:
- 2026-04-21
- DOI:
- 10.1122/8.0001070
- OpenAlex record:
- View
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