New obesity discovery rewrites decades of fat science
May 8, 2026, 9:21 PM
- •HSL, previously understood as a fat-releasing enzyme, also functions within the nucleus of fat cells.
- •Nuclear HSL regulates cellular systems, including mitochondrial activity and the extracellular matrix.
- •The protein's movement is influenced by signaling pathways involving TGF-β and SMAD3.
- •The discovery helps explain why HSL deficiency causes lipodystrophy instead of obesity.
- •Future treatments may focus on restoring normal adipocyte function for metabolic disease.
Scientists have discovered that the fat-burning protein HSL, known for its role in releasing stored fat, also functions within the nucleus of fat cells. This new role helps maintain healthy adipose tissue and explains why the absence of HSL leads to lipodystrophy, not obesity. The findings suggest a shift in understanding metabolic disorders, with a focus on preserving healthy fat tissue function rather than just reducing fat mass. This research has significant implications for future treatments of obesity and related conditions, emphasizing the importance of adipocyte health.
Entities Mentioned
Dominique LanginJérémy Dufau
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