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Related Experiment Videos

Metabolic adaptation to long term changes in gravity environment.

K Slenzka1, R Appel, H Rahmann

  • 1OHB-System GmbH, Bremen, Germany.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|September 7, 2001
PubMed
Summary

Exposure to hyper-gravity (3g) in Cichlid fish larvae reduced brain enzyme activity, including nucleoside diphosphate kinase (NDPK) and creatine kinase (BB-CK). This study reveals gravity

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Neurochemistry international·2010

Area of Science:

  • Biochemistry
  • Neuroscience
  • Gravitational Biology

Background:

  • Cellular functions are sensitive to environmental factors, including gravity.
  • Understanding cellular responses to altered gravity is crucial for space biology and fundamental science.
  • Fish larvae offer a model system to study early developmental responses to gravitational changes.

Purpose of the Study:

  • To investigate the biochemical effects of hyper-gravity on Cichlid fish larval brains.
  • To analyze changes in key energy metabolites and enzyme activities under simulated hyper-gravity.
  • To elucidate the cellular signal-response mechanisms involved in gravity perception.

Main Methods:

  • Biochemical analysis of Cichlid fish larvae brain tissue.
  • Exposure to 3g hyper-gravity for 7 days during early development.

Related Experiment Videos

  • High-performance liquid chromatography (HPLC) for quantifying adenine nucleotides, phosphocreatine, and nicotinamide adenine dinucleotides.
  • Measurement of nucleoside diphosphate kinase (NDPK) and creatine kinase (BB-CK) activities.

    • Main Results:

    • Hyper-gravity (3g) exposure led to decreased NDPK and BB-CK enzyme activities in larval brains.
    • A slight reduction in total adenine nucleotides (TAN) and adenylate energy charge (AEC) was observed.
    • Significant increase in NAD+ concentration and a decrease in NADP+ concentration occurred under hyper-gravity conditions.
    • These findings suggest a direct influence of gravity on cellular energy metabolism and redox balance.

    Conclusions:

    • Gravity significantly impacts cellular biochemical processes, affecting energy metabolism and nucleotide concentrations.
    • The observed changes in NAD+/NADP+ ratio indicate a role in cellular response to gravitational stress.
    • This research provides insights into the cellular mechanisms underlying gravity perception and adaptation.