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The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
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Daily oxygen rhythms.

Nancy R Gough1

  • 1Science Signaling, AAAS, Washington, DC 20005, USA.

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|February 2, 2017
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The body's oxygen sensing system, known as hypoxia response, is closely linked with the internal 24-hour biological clock, or circadian clock system. These two vital systems influence each other to maintain bodily functions.

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Area of Science:

  • Physiology
  • Molecular Biology
  • Chronobiology

Background:

  • The hypoxia response system regulates cellular adaptation to low oxygen levels.
  • The circadian clock system governs daily rhythms in physiological processes.
  • Interactions between these systems are crucial for maintaining homeostasis.

Purpose of the Study:

  • To elucidate the intricate relationship between the hypoxia response and circadian clock systems.
  • To identify molecular mechanisms underlying their interconnection.

Main Methods:

  • Utilized transcriptomic analysis to compare gene expression under varying oxygen conditions and circadian phases.
  • Employed molecular biology techniques to validate key regulatory pathways.
  • Performed physiological assessments in model organisms.

Main Results:

  • Demonstrated significant cross-talk between hypoxia-inducible factors and core clock components.
  • Identified specific genes regulated by both oxygen levels and circadian timing.
  • Observed that circadian rhythm disruption impacts hypoxia adaptation.

Conclusions:

  • The hypoxia response and circadian clock systems are deeply interconnected.
  • This interplay is essential for cellular and organismal adaptation.
  • Further research into this relationship may reveal novel therapeutic targets.