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Related Experiment Videos

[Space flight and peroxidative damage].

Tang-bin Yang1, Ping Zhong, Li-na Qu

  • 1Institute of Space Medico-Engineering, Beijing, China. ytbin@163.com

Hang Tian Yi Xue Yu Yi Xue Gong Cheng = Space Medicine & Medical Engineering
|March 11, 2004
PubMed
Summary
This summary is machine-generated.

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Space flight causes oxidative stress and peroxidative damage, impacting lipids and DNA. Increasing dietary antioxidants may mitigate these postflight effects.

Area of Science:

  • Space medicine
  • Biochemistry
  • Physiology

Context:

  • Space flight induces physiological changes, including oxidative stress.
  • Postflight recovery is marked by increased peroxidative damage, particularly after long-duration missions.
  • This damage affects lipids and DNA, with effects lasting weeks after landing.

Purpose:

  • To investigate the physiological markers of oxidative damage in astronauts post-space flight.
  • To explore the underlying causes of increased oxidative stress during and after space missions.
  • To identify potential strategies for mitigating space flight-induced oxidative damage.

Summary:

  • Space flight elevates oxidative stress, evidenced by increased lipid peroxidation and DNA damage markers (8-iso-prostaglandin F2alpha, 8-oxo-7, 8 dihydro-2 deoxyguanosine).

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  • Observed changes include reduced blood antioxidants and increased urinary excretion of damage markers.
  • Rodent studies corroborate these findings, attributing postflight changes to re-entry stress.

    • Impact:

    • Findings highlight the need for countermeasures against space flight-induced oxidative stress.
    • Suggests that dietary antioxidant supplementation could reduce postflight oxidative damage.
    • Informs strategies for astronaut health and performance during long-duration space missions.