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Area of Science:

  • Cardiovascular Biology
  • Space Medicine
  • Molecular Biology

Background:

  • Space exploration's accessibility necessitates understanding spaceflight's molecular effects on human physiology.
  • Space-induced changes can disrupt signaling pathways, affecting cardiovascular, nervous, and musculoskeletal systems.

Purpose of the Study:

  • To investigate gene expression alterations in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) exposed to spaceflight.
  • To identify molecular targets and potential therapeutic agents for spaceflight-related cardiovascular changes.

Main Methods:

  • Utilized hiPSC-CMs subjected to spaceflight and postflight conditions.
  • Analyzed gene expression profiles, focusing on cardiovascular disease (CVD) and NRF2 oxidative stress pathways.
  • Performed computational drug repurposing analysis to identify potential therapeutic candidates.

Main Results:

  • Identified consistent directional gene expression changes in hiPSC-CMs related to CVD and NRF2 pathways during and after spaceflight.
  • Discovered ten candidate drugs capable of reversing spaceflight-induced transcriptomic alterations in cardiomyocytes.

Conclusions:

  • Spaceflight induces significant molecular changes in cardiomyocytes relevant to cardiovascular health.
  • Computational drug repurposing shows promise for developing countermeasures against spaceflight's physiological effects.
  • Multi-omic research is essential for safeguarding astronaut health in space exploration.