Browning Mechanisms in Adipose Tissue Metabolism
Summary
White adipose tissue (WAT) serves as the body’s principal energy reservoir, storing excess calories as triglycerides. Under specific stimuli—most notably cold exposure, sympathetic activation and certain endocrine signals—subpopulations of white adipocytes undergo a phenotypic transformation known as “browning” or “beiging”. During this process, cells adopt multilocular lipid droplets, enhanced mitochondrial biogenesis and upregulate thermogenic genes, foremost among them uncoupling protein 1 (UCP1). These “beige” adipocytes mirror the heat-generating properties of classical brown adipose tissue (BAT), shifting energy balance from storage to dissipation. Key transcriptional regulators, including PR domain-containing 16 (PRDM16) and peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), orchestrate the development of thermogenic programmes. Hormonal factors such as fibroblast growth factor 21, bone morphogenetic proteins and the muscle-derived myokine irisin further modulate the browning cascade. Recent advances have also illuminated the roles of G protein-coupled receptors, epigenetic modifications and microRNAs in fine-tuning adipocyte plasticity. Globally, the promotion of adipose tissue browning holds promise as a therapeutic avenue to counteract obesity, insulin resistance and associated metabolic disorders by elevating basal energy expenditure and improving glucose homeostasis.
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Browning Mechanisms in Adipose Tissue Metabolism publication trend
The graph below shows the total number of articles in browning mechanisms in adipose tissue metabolism across all publications each year (not limited to Nature Index journals).
Technical terms
White adipose tissue (WAT): Energy-storing fat depots composed of unilocular lipid cells.
Brown adipose tissue (BAT): Thermogenic fat rich in mitochondria that dissipates energy as heat.
Beige adipocytes: Inducible thermogenic cells within WAT with multilocular lipid droplets and high UCP1 expression.
Uncoupling protein 1 (UCP1): Mitochondrial protein that enables proton leak and heat generation.
PRDM16: Transcriptional co-regulator that drives the thermogenic gene programme in adipocytes.
PGC-1α: Coactivator that stimulates mitochondrial biogenesis and oxidative metabolism in thermogenic cells.
References
- GPR84-mediated signal transduction effects metabolic function by promoting brown adipocyte activity. Journal of Clinical Investigation (2023).
- Purple Sweet Potato Ameliorates High-Fat Diet-Induced Visceral Adiposity by Attenuating Inflammation and Promoting Adipocyte Browning. Journal of Agricultural and Food Chemistry (2025).
- Trans-Cinnamic Acid Stimulates White Fat Browning and Activates Brown Adipocytes. Nutrients (2019).
- Turning WAT into BAT: a review on regulators controlling the browning of white adipocytes. Bioscience Reports (2013).
- Brown adipose tissue activity as a target for the treatment of obesity/insulin resistance. Frontiers in Physiology (2015).
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