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Nrf2 activation by tauroursodeoxycholic acid in experimental models of Parkinson's disease

Lookup NU author(s): Professor Tiago OuteiroORCiD


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© 2017 Elsevier Inc.Parkinson's disease (PD) is a progressive neurological disorder, mainly characterized by the loss of dopaminergic neurons in the substantia nigra pars compacta. Although the cause of PD remains elusive, mitochondrial dysfunction and severe oxidative stress are strongly implicated in the cell death that characterizes the disease. Under oxidative stress, the master regulator of cellular redox status, nuclear factor erythroid 2 related factor 2 (Nrf2), is responsible for activating the transcription of several cytoprotective enzymes, namely glutathione peroxidase (GPx) and heme oxygenase-1 (HO-1). Nrf2 is a promising target to limit reactive oxygen species (ROS)-mediated damage in PD. Here, we show that tauroursodeoxycholic acid (TUDCA) prevents both 1-methyl-4-phenylpyridinium (MPP+)- and α-synuclein-induced oxidative stress, through Nrf2 activation, in SH-SY5Y cells. Additionally, we used C57BL/6 male mice treated with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) to elucidate the effect of TUDCA in this in vivo model of PD. In vivo, TUDCA treatment increases the expression of Nrf2, Nrf2 stabilizer DJ-1, and Nrf2 downstream target antioxidant enzymes HO-1 and GPx. Moreover, we found that TUDCA enhances GPx activity in the brain. Altogether, our results suggest that TUDCA is a promising agent to limit ROS-mediated damage, in different models of PD acting, at least in part, through modulation of the Nrf2 signaling pathway. Therefore, TUDCA should be considered a promising therapeutic agent to be implemented in PD.

Publication metadata

Author(s): Moreira S, Fonseca I, Nunes MJ, Rosa A, Lemos L, Rodrigues E, Carvalho AN, Outeiro TF, Rodrigues CMP, Gama MJ, Castro-Caldas M

Publication type: Article

Publication status: Published

Journal: Experimental Neurology

Year: 2017

Volume: 295

Pages: 77-87

Print publication date: 01/09/2017

Online publication date: 25/05/2017

Acceptance date: 24/05/2017

ISSN (print): 0014-4886

ISSN (electronic): 1090-2430

Publisher: Academic Press Inc.


DOI: 10.1016/j.expneurol.2017.05.009

PubMed id: 28552716


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