Beaudry Lab identifies new role for brown fat in lipid metabolism
Publications
A new study co-authored by the Beaudry Lab and published in EMBO Reports reveals how a gut-derived hormone can rapidly enhance lipid handling through brown adipose tissue (BAT). The paper, titled “Acute exogenous acyl-GIP treatment enhances lipid handling and fatty acid oxidation by involving brown fat”, provides novel insight into how glucose-dependent insulinotropic polypeptide (GIP) influences whole-body metabolism. Read the full article in EMBO Reports →
Understanding how GIP affects fat metabolism
The research shows that a single dose of acyl-GIP (1 nmol/kg) in obese male mice improves whole-body lipid tolerance and boosts fatty acid oxidation. These effects depend on GIP receptor (GIPR) signalling within brown fat, a key thermogenic tissue known for its ability to burn lipids for energy. When GIPR was removed from BAT, the beneficial effects of acyl-GIP were lost—confirming the essential role of brown fat in mediating GIP’s metabolic actions.
Key findings
Acute acyl-GIP treatment improved lipid tolerance and increased lipid oxidation.
Enhanced lipid uptake and lipoprotein lipase activity were observed in BAT.
Deleting GIP receptors in brown fat prevented these metabolic improvements.
Why it matters
The findings uncover a previously unknown connection between GIP and brown fat, expanding understanding of how hormonal signals regulate lipid metabolism. This work highlights brown adipose tissue as a promising therapeutic target for improving lipid clearance and managing obesity-related disorders.
Next steps
Building on these findings, the Beaudry Lab will explore sex differences, long-term effects, and human translation of GIP-BAT interactions. These studies form part of the lab’s broader research program on hormonal and nutritional regulation of adipose tissue function.
