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

Cheryl Cero, Hannah J. Lea, Kenneth Y. Zhu, Farnaz Shamsi, Yu Hua Tseng, Aaron M. Cypess

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article numbere139160
JournalJCI Insight
Volume6
Issue number11
DOIs
StatePublished - Jun 8 2021

ASJC Scopus subject areas

  • General Medicine

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