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• W1980229483 abstract "Hydrogen sulfide (H(2)S), a novel gaseous mediator, has been recognized to protect neurons from overexcitation by enhancing the activity of the adenosine triphosphate-sensitive potassium (K-ATP) channel. However, no direct evidence supports that the K-ATP channel contributes to the neuroprotective effect of H(2)S in neurodegeneration. Herein, wild-type and Kir6.2 knockout (Kir6.2(-/-)) mice were used to establish the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of Parkinson's disease (PD) so as to investigate the involvement of K-ATP channels in the neuroprotection of H(2)S.Systemic administration of sodium hydrosulfide (NaHS) (an H(2)S donor, 5.6 mg/kg/day) for 7 days rescued MPTP-induced loss of dopaminergic (DA) neurons in substantia nigra compacta of both Kir6.2(+/+) and Kir6.2(-/-) mice. Consistently, NaHS (100 μM) protected primary mesencephalic neurons against 1-methyl-4-phenylpyridinium (MPP(+))-induced cytotoxicity in both genotypes. We further found that deficiency of mitochondrial uncoupling protein 2 (UCP2), which reduces reactive oxygen species (ROS) production and functions as upstream to the K-ATP channel in determining vulnerability of DA neurons, abolished the protective effects of H(2)S against either DA neuron degeneration in the PD mouse model or MPP(+)-induced injury in primary mesencephalic neurons. Rationally, UCP2 evokes mild uncoupling, which in turn diminishes ROS accumulation in DA neurons. Furthermore, H(2)S exerted neuroprotective effect via enhancing UCP2-mediated antioxidation and subsequently suppressing ROS-triggered endoplasmic reticulum stress as well as ultimately inhibiting caspase 12-induced neuronal apoptosis.H(2)S protects DA neurons against degeneration in a UCP2 rather than Kir6.2/K-ATP channel-dependent mechanism, which will give us an insight into the potential of H(2)S in terms of opening up new therapeutic avenues for PD." @default.
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• W1980229483 date "2012-09-15" @default.
• W1980229483 modified "2023-09-23" @default.
• W1980229483 title "The Neuroprotection of Hydrogen Sulfide Against MPTP-Induced Dopaminergic Neuron Degeneration Involves Uncoupling Protein 2 Rather Than ATP-Sensitive Potassium Channels" @default.
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• W1980229483 doi "https://doi.org/10.1089/ars.2011.4507" @default.
• W1980229483 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3392622" @default.
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