White adipose tissue browning (WAT browning)

White adipose tissue (WAT) browning, also known as beiging, is a physiological process where white adipocytes transdifferentiate into beige (or 'brite') adipocytes that possess thermogenic properties similar to brown fat [5, 18, 19]. This phenotypic shift is primarily characterized by the induction of Uncoupling Protein 1 (UCP1), which uncouples mitochondrial respiration from ATP synthesis to dissipate energy as heat [1, 12, 17]. As a therapeutic strategy, inducing WAT browning aims to combat obesity and metabolic disorders by increasing systemic energy expenditure and improving insulin sensitivity [2, 6, 20]. Common pharmacological approaches include the activation of the beta-3 adrenergic receptor (ADRB3) or the modulation of transcription factors like PPAR-gamma and PRDM16 [4, 7, 14]. While beneficial in metabolic disease, unintended or excessive browning has been implicated in the development of cachexia in cancer and burn patients, highlighting the need for tissue-specific targeting [12, 19].

Other names

Beiging of white adipose tissueBrowning of WATInduction of beige adipocytesBrite (brown-in-white) adipocyte formationAdaptive thermogenesis in white fat

Induction of the thermogenic gene program via activation of the beta-3 adrenergic receptor (ADRB3), stimulation of PPAR-gamma/PRDM16 transcriptional complexes, or modulation of sirtuin signaling to upregulate UCP1 expression.