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PGC-1α regulates translocated in liposarcoma activity: role in oxidative stress gene expression

Cristina Sánchez-Ramos1, Alberto Tierrez, Oscar Fabregat-Andrés

  • 1Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III, Madrid, Spain.

Antioxidants & Redox Signaling
|February 23, 2011
PubMed

Insights

Translocated in liposarcoma (TLS) protein regulates oxidative stress genes by interacting with PGC-1α. This highlights a link between DNA damage response and cellular metabolism.

Area of Science:

  • Molecular biology
  • Cellular biology
  • Genetics

Background:

  • Translocated in liposarcoma (TLS) is a multifunctional protein implicated in genotoxic stress responses.
  • TLS influences gene expression through splicing and mRNA transport, bridging transcriptional and posttranscriptional regulation.

Purpose of the Study:

  • To identify molecular targets and regulatory partners of the TLS protein.
  • To elucidate the role of TLS in regulating gene expression, particularly in response to oxidative stress.

Main Methods:

  • Microarray gene expression analysis was employed to assess gene expression changes.
  • Protein-protein interactions were investigated to identify regulatory partners of TLS.

Main Results:

  • TLS was found to transcriptionally regulate genes involved in oxidative stress protection.
  • This regulation is dependent on the interaction of TLS with peroxisome proliferator-activated receptor γ-coactivator 1α (PGC-1α).
  • TLS transcriptional activity is significantly impaired in the absence of PGC-1α.

Conclusions:

  • A regulatory circuit exists linking reactive oxygen species (ROS) detoxification to oxidative metabolism and DNA damage response.
  • TLS and PGC-1α coordinate cellular responses to oxidative stress and genomic damage.

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