AMPK and PPARdelta agonists are exercise mimetics.

AMPK and PPARdelta agonists are exercise mimetics.
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DOI:
10.1016/j.cell.2008.06.051
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发表时间:
2008-08-08
期刊:
影响因子:
64.5
通讯作者:
Evans RM
Evans RM
中科院分区:
生物学1区
文献类型:
--
作者:
Narkar VA;Downes M;Yu RT;Embler E;Wang YX;Banayo E;Mihaylova MM;Nelson MC;Zou Y;Juguilon H;Kang H;Shaw RJ;Evans RM

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耐力运动对整体健康的益处使得寻找能够模拟或增强运动效果以治疗代谢疾病的口服活性药物变得很有必要。尽管某些天然化合物,比如白藜芦醇,具有增强耐力的活性,但其确切的代谢靶点仍然难以捉摸。因此,我们在跑步机跑步测试中检测了特定通路药物对小鼠耐力的影响。我们发现,过氧化物酶体增殖物激活受体β/δ(PPARβ/δ)激动剂和运动训练协同增加成年小鼠的氧化肌纤维和跑步耐力。由于训练会激活腺苷酸活化蛋白激酶(AMPK)和过氧化物酶体增殖物激活受体γ辅激活因子1α(PGC1α),我们接着测试了口服活性的AMPK激动剂AICAR是否足以替代运动需求。出乎意料的是,即使在不运动的小鼠中,单独使用AICAR治疗4周也能诱导代谢基因表达,并使跑步耐力提高44%。这些结果表明,AMPK - PPARδ通路可作为口服活性药物的作用靶点,以增强训练适应性,甚至在不运动的情况下提高耐力。
The benefits of endurance exercise on general health make it desirable to identify orally active agents that would mimic or potentiate the effects of exercise to treat metabolic diseases. Although certain natural compounds, such as reseveratrol, have endurance-enhancing activities, their exact metabolic targets remain elusive. We therefore tested the effect of pathway-specific drugs on endurance capacities of mice in a treadmill running test. We found that PPARβ/δ agonist and exercise training synergistically increase oxidative myofibers and running endurance in adult mice. Because training activates AMPK and PGC1α, we then tested whether the orally active AMPK agonist AICAR might be sufficient to overcome the exercise requirement. Unexpectedly, even in sedentary mice, 4 weeks of AICAR treatment alone induced metabolic genes and enhanced running endurance by 44%. These results demonstrate that AMPK-PPARδ pathway can be targeted by orally active drugs to enhance training adaptation or even to increase endurance without exercise.
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