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Uncoupling Protein 1 Is Necessary for Norepinephrine-Induced Glucose Utilization in Brown Adipose Tissue

Inokuma, Ken-ichi, Ogura-Okamatsu, Yuko, Toda, Chitoku, Kimura, Kazuhiro, Yamashita, Hitoshi, Saito, Masayuki·2005·Diabetes

Abstract

Sympathetic stimulation activates glucose utilization in parallel with fatty acid oxidation and thermogenesis in brown adipose tissue (BAT) through the β-adrenergic receptors. To clarify the roles of the principal thermogenic molecule mitochondrial uncoupling protein 1 (UCP1) in the sympathetically stimulated glucose utilization, we investigated the uptake of 2-deoxyglucose (2-DG) into BAT and some other tissues of UCP1-knockout (KO) mice in vivo. In wild-type (WT) mice, administration of norepinephrine (NE) accelerated the disappearance of plasma 2-DG and increased 2-DG uptake into BAT and heart without any rise of plasma insulin level. In UCP1-KO mice, the stimulatory effect of NE on 2-DG uptake into BAT, but not into heart, disappeared completely. Insulin administration increased 2-DG uptake into BAT and also heart similarly in WT and UCP1-KO mice. NE also increased the activity of AMP-activated protein kinase (AMP kinase) in BAT of WT but not UCP1-KO mice. Our results, together with reports that the activation of AMP kinase increases glucose transport in myocytes, suggest that the sympathetically stimulated glucose utilization in BAT is due to the serial activation of UCP1 and AMP kinase.

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Metadata

Authors
Inokuma, K.-I., Ogura-Okamatsu, Y., Toda, C., Kimura, K., Yamashita, H., & Saito, M.
Venue
Diabetes
Published
2005-05-01
Volume
54
Issue
5
Pages
1385-1391
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2057683888
Cited by
173
References
5
FWCI
2.92
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Uncoupling Protein 1 Is Necessary for Norepinephrine-Induced Glucose Utilization in Brown Adipose Tissue. https://app.cochat.ai/papers/10.2337/diabetes.54.5.1385
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Inokuma, K.-I., Ogura-Okamatsu, Y., Toda, C., Kimura, K., Yamashita, H., & Saito, M. (2005). Uncoupling Protein 1 Is Necessary for Norepinephrine-Induced Glucose Utilization in Brown Adipose Tissue. Diabetes. https://doi.org/10.2337/diabetes.54.5.1385

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