The study in mouse cells analyzed the impact of space radiation and will help scientists better estimate the safety and dangers of space travel. An international team of scientists conducted a long-term experiment onboard the International Space Station to investigate the impact of space radiation
Astronauts may be exposed to high energy charged particles from galactic cosmic rays and solar particle events, as well as secondary protons and neutrons after they leave Earth’s protective atmosphere. Because biomolecules, cells, and tissues have different ionization patterns than terrestrial radiation, the associated biological consequences are poorly understood, and the degree of danger involved is subject to enormous uncertainty.
Frozen mouse embryonic stem cells were launched from the ground to the International Space Station, stored for a long period of time, recovered on the ground, and examined for chromosome aberrations. Credit: Takashi Morita, OMU “Our study aims to address the shortcomings of previous ground-based experiments by performing a direct quantitative measurement of the biological effect of space radiation on the International Space Station and comparing this real biological effect with physical estimates in the ground-based experiments,” said Takashi Morita, a professor at the Graduate School of Medicine, Osaka Metropolitan University.
Looking ahead, the researchers hope to take their studies a step further. “For future work, we are considering using human embryonic stem cells rather than mouse embryonic stem cells given that the human cells are much better suited for human risk assessment, and it is easier to analyze chromosome aberrations,” said Professor Morita.
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