Abstract:
:Brown adipose tissue (BAT) is a metabolically active organ that contributes to the maintenance of systemic metabolism. The sympathetic nervous system plays important roles in the homeostasis of BAT and promotes its browning and activation. However, the role of other neurotransmitters in BAT homeostasis remains largely unknown. Our metabolomic analyses reveal that gamma-aminobutyric acid (GABA) levels are increased in the interscapular BAT of mice with dietary obesity. We also found a significant increase in GABA-type B receptor subunit 1 (GABA-BR1) in the cell membranes of brown adipocytes of dietary obese mice. When administered to obese mice, GABA induces BAT dysfunction together with systemic metabolic disorder. Conversely, the genetic inactivation or inhibition of GABA-BR1 leads to the re-browning of BAT under conditions of metabolic stress and ameliorated systemic glucose intolerance. These results indicate that the constitutive activation of GABA/GABA-BR1 signaling in obesity promotes BAT dysfunction and systemic metabolic derangement.
journal_name
Cell Repjournal_title
Cell reportsauthors
Ikegami R,Shimizu I,Sato T,Yoshida Y,Hayashi Y,Suda M,Katsuumi G,Li J,Wakasugi T,Minokoshi Y,Okamoto S,Hinoi E,Nielsen S,Jespersen NZ,Scheele C,Soga T,Minamino Tdoi
10.1016/j.celrep.2018.08.024subject
Has Abstractpub_date
2018-09-11 00:00:00pages
2827-2837.e5issue
11issn
2211-1247pii
S2211-1247(18)31295-6journal_volume
24pub_type
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