Brain insulin lowers circulating BCAA levels by inducing hepatic BCAA catabolism.
Brain insulin lowers circulating BCAA levels by inducing hepatic BCAA catabolism.
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DOI:
10.1016/j.cmet.2014.09.003
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发表时间:
2014-11-04
期刊:
影响因子:
29
通讯作者:
Buettner C
中科院分区:
文献类型:
--
作者:
Shin AC;Fasshauer M;Filatova N;Grundell LA;Zielinski E;Zhou JY;Scherer T;Lindtner C;White PJ;Lapworth AL;Ilkayeva O;Knippschild U;Wolf AM;Scheja L;Grove KL;Smith RD;Qian WJ;Lynch CJ;Newgard CB;Buettner C
Circulating branched-chain amino acid (BCAA) levels are elevated in obesity/diabetes and are a sensitive predictor for type 2 diabetes. Here we show in rats that insulin dose-dependently lowers plasma BCAA levels through induction of hepatic protein expression and activity of branched-chain α keto-acid dehydrogenase (BCKDH), the rate-limiting enzyme in the BCAA degradation pathway. Selective induction of hypothalamic insulin signaling in rats and genetic modulation of brain insulin receptors in mice demonstrate that brain insulin signaling is a major regulator of BCAA metabolism by inducing hepatic BCKDH. Short-term overfeeding impairs the ability of brain insulin to lower BCAAs in rats. High-fat feeding in non-human primates and obesity and/or diabetes in humans is associated with reduced BCKDH protein in liver. These findings support the concept that decreased hepatic BCKDH is a major cause of increased plasma BCAAs, and that hypothalamic insulin resistance may account for impaired BCAA metabolism in obesity and diabetes.
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影响因子:
56.9
作者:
Cota, D;Proulx, K;Seeley, RJ
通讯作者:
Seeley, RJ
影响因子:
4.5
作者:
Ferrara CT;Wang P;Neto EC;Stevens RD;Bain JR;Wenner BR;Ilkayeva OR;Keller MP;Blasiole DA;Kendziorski C;Yandell BS;Newgard CB;Attie AD
通讯作者:
Attie AD
影响因子:
6.9
作者:
Mihalik, Stephanie J.;Goodpaster, Bret H.;Kelley, David E.;Chace, Donald H.;Vockley, Jerry;Toledo, Frederico G. S.;DeLany, James P.
通讯作者:
DeLany, James P.
DOI:
10.1152/ajpendo.00153.2003
发表时间:
2003-10-01
影响因子:
5.1
作者:
Lynch, CJ;Halle, B;Hutson, SM
通讯作者:
Hutson, SM
影响因子:
4.1
作者:
Kobayashi, R;Shimomura, Y;Harris, RA
通讯作者:
Harris, RA