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Study Reveals Spaceflight May Accelerate Aging in Stem Cells

9/18/2025

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Summary

Story summary

A study in *Cell Stem Cell* suggests spaceflight may accelerate aging in hematopoietic stem and progenitor cells (HSPCs).
HSPCs exhibited decreased cell generation and increased DNA damage in microgravity and radiation conditions aboard the ISS.
Some aging effects partially reverse after returning to Earth, but not entirely.
NASA's Twins Study noted changes in telomere dynamics, with most returning to normal within 48 hours post-flight.
Researchers at UC San Diego used AI tools to monitor HSPC health during ISS missions, aiming for real-time monitoring in future studies.

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Story summary

A study in *Cell Stem Cell* suggests spaceflight may accelerate aging in hematopoietic stem and progenitor cells (HSPCs).
HSPCs exhibited decreased cell generation and increased DNA damage in microgravity and radiation conditions aboard the ISS.
Some aging effects partially reverse after returning to Earth, but not entirely.
NASA's Twins Study noted changes in telomere dynamics, with most returning to normal within 48 hours post-flight.
Researchers at UC San Diego used AI tools to monitor HSPC health during ISS missions, aiming for real-time monitoring in future studies.