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Related Experiment Videos

Vibrational force alters mRNA expression in osteoblasts

R R Tjandrawinata1, V L Vincent, M Hughes-Fulford

  • 1Department of Medicine, University of California-San Francisco, Veterans Affairs Medical Center-San Francisco 94121, USA.

FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology
|May 1, 1997
PubMed
Summary
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Space shuttle launch vibrations significantly alter osteoblast gene expression, impacting cellular growth and function. These findings highlight the mechanical effects of launch forces on cells, crucial for space biology research.

Area of Science:

  • Space Biology
  • Cellular Mechanobiology
  • Biomedical Engineering

Background:

  • Space shuttle launch involves significant vibrational forces.
  • Osteoblasts are crucial for bone health and are sensitive to mechanical stimuli.
  • Understanding cellular responses to spaceflight conditions is vital for astronaut health and experimental validity.

Purpose of the Study:

  • To investigate the effects of simulated space shuttle launch vibrations on mRNA expression in mouse osteoblastic cells (MC3T3E1).
  • To determine if vibrational forces directly impact gene expression or if changes are mediated by prostaglandin E2 (PGE2).
  • To provide insights into discrepancies observed in onboard versus ground controls for space biology experiments.

Main Methods:

  • MC3T3E1 cells were subjected to simulated launch vibrations (7.83 G rms).
Keywords:
NASA Discipline Cell BiologyNon-NASA Center

Related Experiment Videos

  • mRNA levels of eight key genes, including protooncogenes and bone-related markers, were analyzed.
  • Extracellular PGE2 concentrations were measured to assess its role.

    • Main Results:

    • Vibrational force significantly upregulated c-fos and c-myc mRNA within 30 minutes.
    • Osteocalcin and transforming growth factor-beta1 mRNA levels decreased significantly within 3 hours.
    • No significant changes were observed in beta-actin, histone H4, or cytoplasmic phospholipase A2; cyclooxygenase-2 was undetectable. PGE2 levels remained unaltered.

    Conclusions:

    • Vibrational forces from space shuttle launches directly affect osteoblast gene expression, independent of PGE2 levels.
    • Launch-induced vibrations can alter cellular responses, potentially explaining differences between space and ground experimental controls.
    • Recommendations include implementing vibration controls in space experiments, such as dampened samples or onboard centrifuges.