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Thermogenic Ability of Uncoupling Protein 1 in Beige Adipocytes in Mice

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Title: Thermogenic Ability of Uncoupling Protein 1 in Beige Adipocytes in Mice
Authors: Okamatsu-Ogura, Yuko Browse this author →KAKEN DB
Fukano, Keigo Browse this author
Tsubota, Ayumi Browse this author
Uozumi, Akihiro Browse this author
Terao, Akira Browse this author →KAKEN DB
Kimura, Kazuhiro Browse this author →KAKEN DB
Saito, Masayuki Browse this author
Issue Date: 30-Dec-2013
Publisher: Public Library of Science
Journal Title: PLoS One
Volume: 8
Issue: 12
Start Page: e84229
Publisher DOI: 10.1371/journal.pone.0084229
Abstract: Chronic adrenergic activation leads to the emergence of beige adipocytes in some depots of white adipose tissue in mice. Despite their morphological similarities to brown adipocytes and their expression of uncoupling protein 1 (UCP1), a thermogenic protein exclusively expressed in brown adipocytes, the beige adipocytes have a gene expression pattern distinct from that of brown adipocytes. However, it is unclear whether the thermogenic function of beige adipocytes is different from that of classical brown adipocytes existing in brown adipose tissue. To examine the thermogenic ability of UCP1 expressed in beige and brown adipocytes, the adipocytes were isolated from the fat depots of C57BL/6J mice housed at 24 degrees C (control group) or 10 degrees C (cold-acclimated group) for 3 weeks. Morphological and gene expression analyses revealed that the adipocytes isolated from brown adipose tissue of both the control and cold-acclimated groups consisted mainly of brown adipocytes. These brown adipocytes contained large amounts of UCP1 and increased their oxygen consumption when stimulated with norepinephirine. Adipocytes isolated from the perigonadal white adipose tissues of both groups and the inguinal white adipose tissue of the control group were white adipocytes that showed no increase in oxygen consumption after norepinephrine stimulation. Adipocytes isolated from the inguinal white adipose tissue of the cold-acclimated group were a mixture of white and beige adipocytes, which expressed UCP1 and increased their oxygen consumption in response to norepinephrine. The UCP1 content and thermogenic ability of beige adipocytes estimated on the basis of their abundance in the cell mixture were similar to those of brown adipocytes. These results revealed that the inducible beige adipocytes have potent thermogenic ability comparable to classical brown adipocytes.
Rights: http://creativecommons.org/licenses/by/3.0/
Type: article
URI: http://hdl.handle.net/2115/54735
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 岡松 優子

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