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In Vivo Imaging of Reactive Oxygen Species in a Murine Wound Model
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Mitochondrial ROS regulates cytoskeletal and mitochondrial remodeling to tune cell and tissue dynamics in a model for

Sonia Muliyil1, Maithreyi Narasimha1

  • 1Department of Biological Sciences, Tata Institute of Fundamental Research, Colaba, Mumbai 400005, India.

Developmental Cell
|February 4, 2014
PubMed

Insights

Mitochondrial reactive oxygen species (mtROS) drive wound healing by triggering cell delamination. ROS levels precisely control cell behavior and tissue dynamics through ROCK signaling, impacting tissue patterning and homeostasis.

Area of Science:

  • Cell Biology
  • Developmental Biology
  • Wound Healing Research

Background:

  • Understanding the molecular mechanisms of wound healing is crucial for medical advancements.
  • Dorsal closure in Drosophila serves as a powerful model system for studying tissue repair processes.

Purpose of the Study:

  • To investigate the role of mitochondrial reactive oxygen species (mtROS) in Drosophila dorsal closure.
  • To elucidate how ROS cues initiate and regulate the wound healing response at the cellular and tissue levels.

Main Methods:

  • Real-time visualization of reactive oxygen species (ROS) activity in live Drosophila.
  • Single-cell perturbation strategies to analyze the function of mtROS.
  • Analysis of actomyosin and mitochondrial dynamics and architecture.

Main Results:

  • Stochastic ROS generation in the amnioserosa is both necessary and sufficient to trigger cell delamination during wound healing.
  • mtROS exhibit dose-dependent effects on actomyosin and mitochondrial structures, influencing cell behavior and tissue dynamics.
  • ROS levels quantitatively and qualitatively modulate cell behavior and tissue dynamics.

Conclusions:

  • ROS signaling, mediated by ROCK and its substrates, plays a pivotal role in coordinating mitochondrial morphology and tissue tension.
  • This pathway is essential for regulating tissue patterning and maintaining homeostasis during wound healing.
  • Mitochondrial ROS are key regulators of the cellular and tissue responses to injury.

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