β3-Adrenergic receptors regulate human brown/beige adipocyte lipolysis and thermogenesis.

β3-Adrenergic receptors regulate human brown/beige adipocyte lipolysis and thermogenesis.
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DOI:
10.1172/jci.insight.139160
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发表时间:
2021-06-08
期刊:
影响因子:
8
通讯作者:
Cypess AM
Cypess AM
中科院分区:
医学1区
文献类型:
--
作者:
Cero C;Lea HJ;Zhu KY;Shamsi F;Tseng YH;Cypess AM

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β3-肾上腺素能受体(β3-ARs)是啮齿动物棕色脂肪组织(BAT)产热的主要调节因子。然而,在人类中,BAT和β3-AR的生理相关性仍然存在争议。在此,使用来自锁骨上颈部脂肪的原代人脂肪细胞和来自2名受试者的深颈部脂肪的永生化棕色/米色脂肪细胞,我们证明β3-AR在调节脂解、糖酵解和产热中起关键作用。沉默β3-AR损害生热、脂肪酸代谢和线粒体质量所必需的基因。在功能上,β3-AR的减少降低了激动剂介导的细胞内cAMP、脂解和脂解激活的解偶联蛋白1介导的产热能力的增加。此外,mirabegron,一种选择性的人β3-AR激动剂,刺激BAT脂解和产热,并且这两个过程在沉默β3-AR表达后丧失。这项研究强调了人类棕色/米色脂肪细胞中的β3-AR是维持脂解和产热细胞机制的多种组分所必需的,并且β3-AR激动剂可用于实现人体代谢获益。
β3-Adrenergic receptors (β3-ARs) are the predominant regulators of rodent brown adipose tissue (BAT) thermogenesis. However, in humans, the physiological relevance of BAT and β3-AR remains controversial. Herein, using primary human adipocytes from supraclavicular neck fat and immortalized brown/beige adipocytes from deep neck fat from 2 subjects, we demonstrate that the β3-AR plays a critical role in regulating lipolysis, glycolysis, and thermogenesis. Silencing of the β3-AR compromised genes essential for thermogenesis, fatty acid metabolism, and mitochondrial mass. Functionally, reduction of β3-AR lowered agonist-mediated increases in intracellular cAMP, lipolysis, and lipolysis-activated, uncoupling protein 1–mediated thermogenic capacity. Furthermore, mirabegron, a selective human β3-AR agonist, stimulated BAT lipolysis and thermogenesis, and both processes were lost after silencing β3-AR expression. This study highlights that β3-ARs in human brown/beige adipocytes are required to maintain multiple components of the lipolytic and thermogenic cellular machinery and that β3-AR agonists could be used to achieve metabolic benefit in humans.
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