Dietary long-chain, but not medium-chain, triglycerides impair exercise performance and uncouple cardiac mitochondria in rats.

Dietary long-chain, but not medium-chain, triglycerides impair exercise performance and uncouple cardiac mitochondria in rats.
复制标题

DOI:
10.1186/1743-7075-8-55
复制
发表时间:
2011-08-01
影响因子:
4.5
通讯作者:
Clarke K
Clarke K
中科院分区:
医学3区
文献类型:
--
作者:
Murray AJ;Knight NS;Little SE;Cochlin LE;Clements M;Clarke K

文献摘要

参考文献

被引文献

相似文献

短期食用高脂饮食会损害大鼠和人类的运动能力,并通过激活转录因子过氧化物酶体增殖物激活受体α(PPARα)增加啮齿动物心肌和骨骼肌中线粒体解偶联蛋白UCP3的表达。然而,与长链脂肪酸不同,中链脂肪酸不会激活PPARα,也不会增加肌肉UCP3的表达。因此,我们研究了喂食普通饲料(7.5% kcal来自脂肪)、富含长链甘油三酯(LCT)的饲料(46% kcal来自LCT)或富含中链甘油三酯(MCT)的饲料(46% kcal来自MCT)的大鼠的运动表现和心脏线粒体功能。喂食富含LCT的饮食15天的大鼠比基线时跑得少55%,而喂食富含MCT的饮食的大鼠的运动能力既没有改善也没有恶化。此外,摄入富含LCT的饮食使心脏UCP3表达增加35%,并降低氧化磷酸化效率,而摄入富含MCT的饮食既不改变UCP3表达,也不改变氧化磷酸化效率。我们的研究结果表明,短期高脂喂养对运动表现的负面影响主要是由长链脂肪酸而不是中链脂肪酸介导的,可能通过PPARα依赖性上调UCP3。
Short-term consumption of a high-fat diet impairs exercise capacity in both rats and humans, and increases expression of the mitochondrial uncoupling protein, UCP3, in rodent cardiac and skeletal muscle via activation of the transcription factor, peroxisome proliferator-activated receptor α (PPARα). Unlike long-chain fatty acids however, medium-chain fatty acids do not activate PPARα and do not increase muscle UCP3 expression. We therefore investigated exercise performance and cardiac mitochondrial function in rats fed a chow diet (7.5% kcal from fat), a long-chain triglyceride (LCT) rich diet (46% kcal from LCTs) or a medium-chain triglyceride (MCT) rich diet (46% kcal from MCTs). Rats fed the LCT-rich diet for 15 days ran 55% less far than they did at baseline, whereas rats fed the chow or MCT-rich diets neither improved nor worsened in their exercise capacities. Moreover, consumption of an LCT-rich diet increased cardiac UCP3 expression by 35% and decreased oxidative phosphorylation efficiency, whereas consumption of the MCT-rich diet altered neither UCP3 expression nor oxidative phosphorylation efficiency. Our results suggest that the negative effects of short-term high-fat feeding on exercise performance are predominantly mediated by long-chain rather than medium-chain fatty acids, possibly via PPARα-dependent upregulation of UCP3.
DOI: 10.3945/ajcn.110.002758
发表时间: 2011-04-01
影响因子: 7.1
作者:
Holloway, Cameron J.;Cochlin, Lowri E.;Clarke, Kieran
通讯作者: Clarke, Kieran
DOI: 10.1016/s0014-5793(03)01343-7
发表时间: 2003-12-18
期刊: FEBS LETTERS
影响因子: 3.5
作者:
Hoeks, J;Hesselink, MKC;Schrauwen, P
通讯作者: Schrauwen, P
DOI: 10.1073/pnas.0809580105
发表时间: 2008-11-18
影响因子: 11.1
作者:
Robinson, Alan J.;Overy, Catherine;Kunji, Edmund R. S.
通讯作者: Kunji, Edmund R. S.
DOI: 10.1016/j.freeradbiomed.2010.05.010
发表时间: 2010-08-15
影响因子: 7.4
作者:
Toime, Laurence J.;Brand, Martin D.
通讯作者: Brand, Martin D.
DOI: 10.1096/fj.09-139691
发表时间: 2009-12-01
期刊: FASEB JOURNAL
影响因子: 4.8
作者:
Murray, Andrew J.;Knight, Nicholas S.;Clarke, Kieran
通讯作者: Clarke, Kieran