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Glyoxalase 1 is a proadipogenic gene.

Marissa N Trujillo1, Wei-Chen Zhang1, Emely A Hoffman1

  • 1Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona, USA.

The Journal of Biological Chemistry
|November 9, 2025
PubMed
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Glyoxalase 1 (GLO1) plays a role in fat cell development. Blocking GLO1 in obesity models impaired lipid accumulation and glucose uptake, suggesting GLO1 is important for adipogenesis.

Keywords:
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Area of Science:

  • Metabolism and Endocrinology
  • Cellular Biology
  • Obesity Research

Background:

  • Diabetes and obesity are linked to increased methylglyoxal (MGO), a reactive byproduct of metabolism.
  • MGO can cause harmful post-translational modifications (PTMs) in cells.
  • The glyoxalase system, including glyoxalase 1 (GLO1), helps reduce MGO levels.

Purpose of the Study:

  • To investigate the role of GLO1 in adipogenesis, the process of fat cell formation.
  • To examine how MGO and GLO1 activity affect lipid accumulation and cellular metabolism in differentiating fat cells.

Main Methods:

  • Used GLO1 knockout (GLO1-/-) 3T3-L1 preadipocytes to create cells with high MGO levels.
  • Differentiated these cells into mature adipocytes and analyzed lipid accumulation.
  • Utilized proteomic analysis and immunoblotting to assess metabolic enzyme activity, protein modifications, and signaling pathways.

Main Results:

  • GLO1-/- adipocytes showed impaired lipid accumulation despite elevated MGO.
  • MGO-derived PTMs were restored in GLO1-/- cells after differentiation.
  • Proteomics revealed reduced glycolytic and TCA cycle enzymes in GLO1-/- cells.
  • Decreased AKT phosphorylation and glucose uptake were observed in GLO1-/- adipocytes.

Conclusions:

  • GLO1 appears to have a proadipogenic role, promoting fat cell development.
  • MGO and GLO1 activity are important regulators of adipogenesis and cellular metabolism.
  • These findings suggest potential therapeutic targets for obesity and related metabolic disorders.