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Redox or death: checking on fetal myogenesis

Lucia Latella1, Pier Lorenzo Puri2

  • 1Laboratory of Epigenetics and Regenerative Medicine, IRCCS Fondazione Santa Lucia, Via del Fosso di Fiorano 64, 00143 Rome, Italy; Institute of Translational Pharmacology, National Research Council of Italy, Via Fosso del Cavaliere 100, 00133 Rome, Italy.

Developmental Cell
|May 30, 2014
PubMed

Insights

Skeletal muscle development relies on a Pitx2/Pitx3 network that combats oxidative stress. Without this network, fetal muscle experiences DNA damage and cell death, hindering growth.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Muscle Physiology

Background:

  • Fetal myogenesis is a critical developmental process.
  • Oxidative stress can negatively impact cellular development.
  • The role of specific transcription factors in muscle antioxidant defense was unclear.

Purpose of the Study:

  • To investigate the role of Pitx2/Pitx3 in protecting differentiating skeletal muscle from oxidative stress.
  • To elucidate the molecular mechanisms underlying Pitx2/Pitx3-mediated protection during fetal myogenesis.

Main Methods:

  • Analysis of gene expression patterns in developing skeletal muscle.
  • Investigating the impact of Pitx2/Pitx3 deficiency on oxidative DNA damage.
  • Assessing apoptosis levels in genetically modified models.

Main Results:

  • A network involving Pitx2/Pitx3 and antioxidant enzymes was identified.
  • This network effectively mitigates reactive oxygen species (ROS) during fetal myogenesis.
  • Genetic deficiency of Pitx2/Pitx3 led to significant oxidative DNA damage and apoptosis.

Conclusions:

  • The Pitx2/Pitx3 network is essential for protecting skeletal muscle during development.
  • Disruption of this network results in irreversible oxidative damage and impaired muscle formation.
  • Understanding this pathway is crucial for addressing developmental muscle disorders.

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