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• W1964188110 abstract "Parkinson's disease (PD), caused by selective loss of dopaminergic (DA) neurons in the substantia nigra pars compacta, is the most common movement disorder. While its etiology remains unknown, mitochondrial dysfunction is recognized as one of the major cellular defects contributing to PD pathogenesis. Mitochondrial uncoupling protein 2 (UCP2) has been implicated in neuroprotection in several neuronal injury models. Here we show that hucp2 expression in Drosophila DA neurons under the control of the tyrosine hydroxylase (TH) promoter protects those flies against the mitochondrial toxin rotenone-induced DA neuron death, head dopamine depletion, impaired locomotor activity and energy deficiency. Under normal conditions, hUCP2 flies maintain an enhanced locomotor activity and have higher steady-state ATP levels suggesting improved energy homeostasis. We show that while no increased mitochondrial DNA content or volume fraction is measured in hUCP2 flies, augmented mitochondrial complex I activity is detected. Those results suggest that it is increased mitochondrial function but not mitochondrial biogenesis that appears responsible for higher ATP levels in hUCP2 flies. Consistent with this notion, an up-regulation of Spargel, the Drosophila peroxisome proliferator-activated receptor gamma coactivator 1 (PGC-1) homologue is detected in hUCP2 flies. Furthermore, a Spargel target gene Tfam, the mitochondrial transcription factor A is up-regulated in hUCP2 flies. Taken together, our results demonstrate a neuroprotective effect of hUCP2 in DA neurons in a Drosophila sporadic PD model. Moreover, as the TH promoter activity is present in both DA neurons and epidermis, our results reveal that hucp2 expression in those tissues may act as a stress signal to trigger Spargel activation resulting in enhanced mitochondrial function and increased energy metabolism." @default.
• W1964188110 created "2016-06-24" @default.
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• W1964188110 date "2012-04-01" @default.
• W1964188110 modified "2023-10-17" @default.
• W1964188110 title "A neuroprotective role of the human uncoupling protein 2 (hUCP2) in a Drosophila Parkinson's Disease model" @default.
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• W1964188110 doi "https://doi.org/10.1016/j.nbd.2011.12.055" @default.
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