What is the mechanism underlying the turnover of β-adrenergic receptor on hypertrophied primary adipocytes?
Project/Area Number |
20700528
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Single-year Grants |
Research Field |
Sports science
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Research Institution | Kyorin University |
Principal Investigator |
OGASAWARA Junetsu Kyorin University, 医学部, 助教 (20415110)
|
Project Period (FY) |
2008 – 2010
|
Project Status |
Completed (Fiscal Year 2010)
|
Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
Keywords | 白色脂肪細胞 / 脂肪分解反応 / 運動 / 急性運動 / カテコールアミン / β-アドレナリン受容体 / 内在化 / ユビキチン化 / カテキン型ポリフェノール / アドレナリン受容体 / 脂肪細胞 / 肥満 / ポリフェノール |
Research Abstract |
The purpose of the current study is to investigate the trafficking of β_2-adrenergic receptor (β_2-AR) can regulate the lipolysis in high fat diet-induced hypertrophied adipocytes (HA) that are observed in obese mammals. The animals (C57BL/6J mice) were randomly divided into two groups : a normal diet intake and high fat diet intake, and adipocytes were isolated from epididymal adipose tissue. Low concentration (10 nM) of Isoproterenol (ISO)-stimulated lipolysis was significantly elevated in HA than that in non hypertrophied control (NHC) cells. In contrast, lipolysis in HA was significantly attenuated in high concentration (1 μM) of ISO compared with NHC. Under this condition, in membrane fraction, the levels of β_2-AR was significantly reduced in HA compared with NHC, accompanied by increased levels of β-arrestin-2 and β_2-AR/β-arrestin-2 complex, which are accelerator of agonist-induced trafficking of the β_2-AR from plasma membrane to cytosol. These results suggest that trafficking i.e., internalization of β_2-AR, with high concentration of ISO would be associated with reduced levels of lipolytic response in HA, and that this phenomenon is one of the mechanism underlying lower levels of fatmetabolism in obese mammals in vivo.
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Report
(4 results)
Research Products
(80 results)
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[Journal Article] Comparison of the effect of Oligonol, a new lychee fruit-derived low molecular form of polyphenol, and epigallocatechin-3-gallate on lipolysis in rat primary adipocytes2011
Author(s)
J.Ogasawara, K.Kitadate, H.Nishioka, H.Fujii, T.Sakurai, T.Kizaki, T.Izawa, H.Ishida, H.Ohno
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Journal Title
Phytother.Res. 25
Pages: 467-471
Related Report
Peer Reviewed
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[Journal Article] Oligonol, an oligomerized lychee fruit-derived polyphenol, directly activates Ras/Raf-1/ MEK cascade independently of IL-6 signaling pathway in rat primary adipocytes2010
Author(s)
J.Ogasawara, K.Kitadate, H.Nishioka, H.Fujii, T.Sakurai, T.Kizaki, T.Izawa, H.Ishida, H.Ohno
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Journal Title
Biochem.Biophys.Res.Commun. 402
Pages: 554-559
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Peer Reviewed
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[Journal Article] Effect of Oligonol, low-molecular form of lychee fruit-derived polyphenol, on lipolysis in primary rat adipocytes2009
Author(s)
J.Ogasawara, K.Kitadate, H.Nishioka, H.Fujii, T.Sakurai, T.Kizaki, T.Izawa, H.Ishida, H.Ohno
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Journal Title
Phytother.Res. 23
Pages: 1626-1633
Related Report
Peer Reviewed
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[Journal Article] Hypoxia-inducible factor-lalpha suppresses the expression of macrophage scavenger receptor 12009
Author(s)
K.Shirato, T.Kizaki, T.Sakurai, J.Ogasawara, Y.Ishibashi, T.Iijima, C.Okada, I.Noguchi, K.Imaizumi, M.Taniguchi, H.Ohno
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Journal Title
Pflugers Arch. 459
Pages: 93-103
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Peer Reviewed
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[Journal Article] The Supplementation of Oligonol, the new lychee fruit-derived polyphenol converting into a low-molecular form, has a positive effect on fatigue during regular track-and-field training in young athlete2008
Author(s)
H.Ohno, T.Sakurai, H.Hisajima, S.Abe, T.Kizaki, J.Ogasawara, Y.Ishibashi, K.Imaizumi, T.Takemasa, S.Haga, K.Kitadate, H.Nishioka, H.Fujii
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Journal Title
Adv.Exerc.Sports Physiol. 13
Pages: 93-99
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Peer Reviewed
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[Presentation] 脂肪代謝に及ぼす新規低分子化ポリフェノール(Oligonol)の効果と作用機序2010
Author(s)
小笠原準悦, 北舘健太郎, 西岡浩, 藤井創, 櫻井拓也, 木崎節子, 井澤鉄也, 長澤純一, 斉藤大蔵, 今泉和彦, 大野秀樹
Organizer
第4回学術フロンティア研究発表会
Place of Presentation
所沢
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[Presentation] 運動トレーニングによる肥満・生活習慣病および認知症予防効果とそのメカニズム2010
Author(s)
櫻井拓也, 小笠原準悦, 木崎節子, 石橋義永, 白土健, 井澤鉄也, 今泉和彦, 鈴木健二, 野口いつみ, 芳賀脩光, 大野秀樹
Organizer
第4回学術フロンティア研究発表会
Place of Presentation
所沢
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[Presentation] 老化促進モデルマウスの認知機能障害に対するOligonolの予防効果2010
Author(s)
櫻井拓也, 北舘健太郎, 西岡浩, 若命浩二, 藤井創, 小笠原準悦, 木崎節子, 石橋義永, 藤原智徳, 赤川公朗, 人見嘉哲, 芳賀脩光, 大野秀樹
Organizer
第8回日本予防医学学会学術総会
Place of Presentation
金沢
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[Presentation] ライチ由来新規低分子化ポリフェノールOligonolは疲労改善効果をもつ2008
Author(s)
櫻井拓也, 北舘健太郎, 西岡浩, 藤井創, 久島達也, 安部茂, 木崎節子, 小笠原準悦, 白土健, 井澤鉄也, 今泉和彦, 石田均, 大野秀樹
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国際食品機能学会第5回研究発表会
Place of Presentation
東京
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[Presentation] 運動トレーニングは脂肪細胞由来幹細胞の脂肪細胞への分化を抑制する2008
Author(s)
櫻井拓也, 井澤鉄也, 木崎節子, 小笠原準悦, 白土健, 石橋義永, 今泉和彦, 武政徹, 長澤純一, 芳賀脩光, 大野秀樹
Organizer
第6回日本予防医学会
Place of Presentation
鹿児島
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