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GPR3 sets brown fat on fire

Miroslav Balaz1, Christian Wolfrum2

  • 1Institute of Food, Nutrition and Health, ETH Zürich, Schwerzenbach, Switzerland; Institute of Experimental Endocrinology, Biomedical Research Center at the Slovak Academy of Sciences, Bratislava, Slovakia.

Cell Metabolism
|July 7, 2021
PubMed

Insights

Brown adipocytes can be activated for obesity treatment. A new study reveals lipolysis can trigger thermogenesis via G protein-coupled receptor 3 (GPR3) activation, offering a novel therapeutic pathway.

Area of Science:

  • Metabolism and Endocrinology
  • Cellular Biology
  • Obesity Research

Background:

  • Thermogenic adipocytes are key targets for obesity treatment.
  • Canonical activation involves norepinephrine and β-adrenergic receptors.
  • A noncanonical pathway for adipocyte activation has been recently investigated.

Purpose of the Study:

  • To identify novel mechanisms for brown adipocyte activation.
  • To explore the role of lipolysis in thermogenesis.
  • To investigate the involvement of G protein-coupled receptor 3 (GPR3) in adipocyte function.

Main Methods:

  • Analysis of gene expression related to lipolysis and thermogenesis.
  • Investigation of GPR3 activation in brown adipocytes.
  • Assessment of thermogenic response following lipolysis induction.

Main Results:

  • Lipolysis was found to transcriptionally drive GPR3 activation.
  • Constitutive activation of GPR3 leads to thermogenesis.
  • This represents a noncanonical pathway for brown adipocyte activation.

Conclusions:

  • Lipolysis-induced GPR3 activation provides a novel mechanism for thermogenesis.
  • This pathway offers a potential therapeutic target for obesity and metabolic disorders.
  • Further research into this noncanonical pathway could yield new anti-obesity strategies.

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