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TAF7L modulates brown adipose tissue formation.

Haiying Zhou1, Bo Wan2, Ivan Grubisic1

  • 1Department of Molecular and Cell Biology, Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, United States.

Elife
|May 31, 2014
PubMed
Summary

The TAF7L protein acts as a molecular switch, directing cells towards brown fat or muscle development. This discovery is key for understanding metabolic homeostasis and energy expenditure.

Keywords:
BATDNA loopingPPARγUCP1developmental biologymouseobesitystem cells

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Area of Science:

  • Cellular and Molecular Biology
  • Metabolic Regulation
  • Adipose Tissue Biology

Background:

  • Brown adipose tissue (BAT) is crucial for metabolic homeostasis and energy expenditure through thermogenesis mediated by UCP1.
  • TAF7L was previously identified as a regulator of white adipose tissue (WAT) differentiation.

Purpose of the Study:

  • To investigate the role of TAF7L in regulating cell lineage specification between brown fat and muscle.
  • To elucidate the molecular mechanisms by which TAF7L influences adipose tissue development.

Main Methods:

  • In vivo and in vitro cellular differentiation assays.
  • Chromatin immunoprecipitation and DNA looping assays.
  • Analysis of TAF7L-containing TFIID complexes and their interaction with PPARγ.

Main Results:

  • TAF7L functions as a molecular switch determining cell fate towards brown fat or muscle lineages.
  • TAF7L-containing TFIID complexes associate with PPARγ in adipose tissue.
  • These complexes mediate DNA looping between enhancers and promoter elements, crucial for BAT specification.

Conclusions:

  • TAF7L is a critical regulator of brown adipose tissue (BAT) lineage specification.
  • The tissue-specific TAF7L subunit in TFIID promotes long-range chromatin interactions necessary for BAT development.
  • Findings provide insights into the molecular mechanisms governing metabolic homeostasis and energy expenditure.