Treadmill exercise reduces α-synuclein spreading via PPARα.

Treadmill exercise reduces α-synuclein spreading via PPARα.
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DOI:
10.1016/j.celrep.2022.111058
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发表时间:
2022-07-12
期刊:
影响因子:
8.8
通讯作者:
Pahan, Kalipada
Pahan, Kalipada
中科院分区:
生物学1区
文献类型:
--
作者:
Dutta, Debashis;Paidi, Ramesh Kumar;Raha, Sumita;Roy, Avik;Chandra, Sujyoti;Pahan, Kalipada

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这项研究强调了跑步机运动在减少α-突触核蛋白(α-syn)在A53T脑中的扩散和保护黑质多巴胺能神经元中的重要性。预形成的α-syn纤维(PFF)在幼龄A53T α-syn小鼠的内囊内播种,导致α-syn向黑质和运动皮层的扩散增加,并伴随黑质多巴胺能神经元的丢失。然而,在pff小鼠中,定期在跑步机上运动可减少α-syn在大脑中的扩散,并保护黑质多巴胺能神经元。因此,跑步机运动也可以减轻老年A53T小鼠α-突触核蛋白病。在研究这一机制时,我们观察到跑步机运动诱导大脑中过氧化物酶体增殖物激活受体α (PPARα)的激活,通过TFEB刺激溶酶体的生物发生。因此,在缺乏PPARα的A53T小鼠中,跑步机运动仍然不能刺激TFEB和减少α-突触核蛋白病,而非诺贝特(一种原型PPARα激动剂)可以减少α-突触核蛋白病。这些结果描述了跑步机运动通过PPARα减少α-syn在大脑中的扩散的有益功能。Dutta等人证明,定期在跑步机上运动能够减少小鼠大脑中α-突触核蛋白的扩散,并保护黑质多巴胺能神经元。然而,在缺乏过氧化物酶体增殖物激活受体α (PPARα)的小鼠中,跑步机跑步并不能减少α-突触核蛋白病,这突出了PPARα在跑步机跑步的有益作用中的作用。
This study underlines the importance of treadmill exercise in reducing α-synuclein (α-syn) spreading in the A53T brain and protecting nigral dopaminergic neurons. Preformed α-syn fibril (PFF) seeding in the internal capsule of young A53T α-syn mice leads to increased spreading of α-syn to substantia nigra and motor cortex and concomitant loss of nigral dopaminergic neurons. However, regular treadmill exercise decreases α-syn spreading in the brain and protects nigral dopaminergic neurons in PFF-seeded mice. Accordingly, treadmill exercise also mitigates α-synucleinopathy in aged A53T mice. While investigating this mechanism, we have observed that treadmill exercise induces the activation of peroxisome proliferator-activated receptor α (PPARα) in the brain to stimulate lysosomal biogenesis via TFEB. Accordingly, treadmill exercise remains unable to stimulate TFEB and reduce α-synucleinopathy in A53T mice lacking PPARα, and fenofibrate, a prototype PPARα agonist, reduces α-synucleinopathy. These results delineate a beneficial function of treadmill exercise in reducing α-syn spreading in the brain via PPARα. Dutta et al. demonstrate that regular treadmill exercise is capable of decreasing α-synuclein spreading in the brain and protecting nigral dopaminergic neurons in mice. However, treadmill running does not reduce α-synucleinopathy in mice lacking peroxisome proliferator-activated receptor α (PPARα), highlighting a role of PPARα in the beneficial effect of treadmill running.
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发表时间: 2002-05-16
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影响因子: 16.2
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DOI: 10.1074/jbc.m116.714824
发表时间: 2016-07-15
影响因子: 4.8
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