脂肪生成
产热
褐色脂肪组织
脂肪细胞
产热素
生物
细胞生物学
PRDM16
细胞内
化学
脂肪组织
生物化学
作者
Kaja Rupar,Marie S. Isidor,Lidia Argemi-Muntadas,Marina Agueda-Oyarzabal,Kaja Plucińska,Erin L. Brown,Matthias Mattanovich,Simone Bossi,Marco Tozzi,David Tandio,Patricia S S Petersen,Tora Ida Henriksen,Kajetan Trošt,Jacob B. Hansen,Zachary Gerhart‐Hines,Søren Nielsen,Thomas Moritz,Brice Emanuelli
出处
期刊:FEBS Journal
[Wiley]
日期:2023-01-14
卷期号:290 (10): 2673-2691
被引量:2
摘要
Exploring mechanisms responsible for brown adipose tissue's (BAT) high metabolic activity is crucial to exploit its energy-dissipating ability for therapeutic purposes. Basigin (Bsg), a multifunctional highly glycosylated transmembrane protein, was recently proposed as one of the 98 critical markers allowing to distinguish 'white' and 'brown' adipocytes, yet its function in thermogenic brown adipocytes is unknown. Here, we report that Bsg is negatively associated with obesity in mice. By contrast, Bsg expression increased in the mature adipocyte fraction of BAT upon cold acclimation. Additionally, Bsg levels were highly induced during brown adipocyte maturation in vitro and were further increased upon β-adrenergic stimulation in a HIF-1α-dependent manner. siRNA-mediated Bsg gene silencing in cultured brown adipocytes did not impact adipogenesis nor mitochondrial function. However, a significant decrease in mitochondrial respiration, lipolysis and Ucp1 transcription was observed in adipocytes lacking Bsg, when activated by norepinephrine. Furthermore, using gas chromatography/mass spectrometry-time-of-flight analysis to assess the composition of cellular metabolites, we demonstrate that brown adipocytes lacking Bsg have lower levels of intracellular lactate and acetoacetate. Bsg was additionally required to regulate intracellular AcAc and tricarboxylic acid cycle intermediate levels in NE-stimulated adipocytes. Our study highlights the critical role of Bsg in active brown adipocytes, possibly by controlling cellular metabolism.
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