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- W2073535971 abstract "Increasing evidence suggests that apoptosis may be the mechanism underlying cell death in selective loss of nigral dopaminergic neurons in Parkinson's disease (PD). Previous studies strongly suggested that c-Jun N-terminal kinase (JNK) signaling pathway has a critical role in the animal model with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD. In this study, we report the inhibitory effect of a peptide designated as Tat-JBD on JNKs activation. The sequence of Tat is corresponding to the cell-membrane transduction domain of human immunodeficiency virus-type 1 (HIV-1) and the sequence of an 11-amino acid peptide is corresponding to the residues of JNK-binding domain (JBD) on JNK-interacting protein-1 (JIP-1). Tat-JBD is confirmed to perturb the assembly of JIP-1-JNKs complex, inhibit the activation of JNKs induced by MPTP and consequently diminish the phosphorylation of c-Jun. It also inhibits the phosphorylation of Bcl-2 and the releasing of Bax from Bcl-2/Bax dimmers, sequentially attenuates the translocation of Bax to mitochondria, the release of cytochrome c, the activation of caspase3 and the hydrolyzation of poly-ADP-ribose-polymerase. The death of dopaminergic neurons and the loss of dopaminergic axon in the striatum were significantly suppressed by infusion of the peptide Tat-JBD in MPTP-treated mice. Our findings imply that Tat-JBD offers neuroprotection against MPTP injury via inhibiting the JNK-signaling pathway, and may provide a promising therapeutic approach for PD." @default.
- W2073535971 created "2016-06-24" @default.
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- W2073535971 date "2010-02-01" @default.
- W2073535971 modified "2023-10-08" @default.
- W2073535971 title "Small peptide inhibitor of JNKs protects against MPTP-induced nigral dopaminergic injury via inhibiting the JNK-signaling pathway" @default.
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- W2073535971 doi "https://doi.org/10.1038/labinvest.2009.124" @default.
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