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• W2020766314 abstract "Peroxisome proliferator-activated receptor gamma (PPARgamma) has been proposed as a therapeutic target for neurodegenerative diseases because of its anti-inflammatory action in glial cells. However, PPARgamma agonists preventbeta-amyloid (Abeta)-induced neurodegeneration in hippocampal neurons, and PPARgamma is activated by the nerve growth factor (NGF) survival pathway, suggesting a neuroprotective anti-inflammatory independent action. Here we show that the PPARgamma agonist rosiglitazone (RGZ) protects hippocampal and dorsal root ganglion neurons against Abeta-induced mitochondrial damage and NGF deprivation-induced apoptosis, respectively, and promotes PC12 cell survival. In neurons and in PC12 cells RGZ protective effects are associated with increased expression of the Bcl-2 anti-apoptotic protein. NGF-differentiated PC12 neuronal cells constitutively overexpressing PPARgamma are resistant to Abeta-induced apoptosis and morphological changes and show functionally intact mitochondria and no increase in reactive oxygen species when challenged with up to 50 microM H2O2. Conversely, cells expressing a dominant negative mutant of PPARgamma show increased Abeta-induced apoptosis and disruption of neuronal-like morphology and are highly sensitive to oxidative stress-induced impairment of mitochondrial function. Cells overexpressing PPARgamma present a 4- to 5-fold increase in Bcl-2 protein content, whereas in dominant negative PPARgamma-expressing cells, Bcl-2 is barely detected. Bcl-2 knockdown by small interfering RNA in cells overexpressing PPARgamma results in increased sensitivity to Abeta and oxidative stress, further suggesting that Bcl-2 up-regulation mediates PPARgamma protective effects. PPARgamma prosurvival action is independent of the signal-regulated MAPK or the Akt prosurvival pathways. Altogether, these data suggest that PPARgamma supports survival in neurons in part through a mechanism involving increased expression of Bcl-2." @default.
• W2020766314 created "2016-06-24" @default.
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• W2020766314 date "2007-12-01" @default.
• W2020766314 modified "2023-10-14" @default.
• W2020766314 title "Peroxisome Proliferator-activated Receptor γ Up-regulates the Bcl-2 Anti-apoptotic Protein in Neurons and Induces Mitochondrial Stabilization and Protection against Oxidative Stress and Apoptosis" @default.
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• W2020766314 doi "https://doi.org/10.1074/jbc.m700447200" @default.
• W2020766314 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17965419" @default.
• W2020766314 hasPublicationYear "2007" @default.
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