Sigma-1 receptor agonist PRE084 is protective against mutant huntingtin-induced cell degeneration: involvement of calpastatin and the NF-κB pathway.

Sigma-1 receptor agonist PRE084 is protective against mutant huntingtin-induced cell degeneration: involvement of calpastatin and the NF-κB pathway.
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DOI:
10.1038/cddis.2013.170
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发表时间:
2013-05-23
影响因子:
9
通讯作者:
--
中科院分区:
生物学1区
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--
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线粒体的改变和氧化应激的增加与亨廷顿病(HD)的疾病进展有关。内质网 (ER) 应激和氧化损伤通过 ER 和线粒体之间的密切通讯联系在一起。 Sigma-1 受体 (Sig-1R) 是内质网中的一种伴侣蛋白,参与内质网应激调节,但人们对其在 HD 中的作用或细胞保护机制知之甚少。在这里,我们证明 Sig-1R 激动剂 PRE084 可以增加细胞存活率并抵消神经元 PC6.3 细胞中 N 末端突变亨廷顿蛋白引起的有害影响。特别是,PRE084 通过激活因突变亨廷顿蛋白表达而受到损害的 NF-κB 通路,从而提高细胞抗氧化剂的水平。这些结果表明,Sig-1R 激动剂在 HD 模型中具有有益作用,并且影响 Sig-1R 的化合物可能是未来 HD 药物开发的有希望的靶标。
Alterations in mitochondria and increased oxidative stress are associated with the disease progression in Huntington's disease (HD). Endoplasmic reticulum (ER) stress and oxidative damage are linked through the close communication between the ER and mitochondria. Sigma-1 receptor (Sig-1R) is a chaperone protein in the ER that is involved in ER stress regulation, but little is known about its role in HD or the mechanisms for cell protection. Here we show that the Sig-1R agonist, PRE084 increases cell survival and counteracts the deleterious effects caused by N-terminal mutant huntingtin proteins in neuronal PC6.3 cells. Particularly, PRE084 increased the levels of cellular antioxidants by activating the NF-κB pathway that is compromised by the expression of mutant huntingtin proteins. These results show that the Sig-1R agonist has beneficial effects in models of HD and that compounds affecting the Sig-1R may be promising targets for future drug development in HD.
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