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- W4377010947 abstract "Parkinson's disease (PD) is the most common neurodegenerative movement disorder worldwide, with a greater prevalence in men than women. The etiology of PD is largely unknown, although environmental exposures and neuroinflammation are linked to protein misfolding and disease progression. Activated microglia are known to promote neuroinflammation in PD, but how environmental agents interact with specific innate immune signaling pathways in microglia to stimulate conversion to a neurotoxic phenotype is not well understood. To determine how nuclear factor kappa B (NF-κB) signaling dynamics in microglia modulate neuroinflammation and dopaminergic neurodegeneration, we generated mice deficient in NF-κB activation in microglia (CX3CR1-Cre::IKK2fl/fl ) and exposed them to 2.5 mg/kg/day of rotenone for 14 days, followed by a 14-day post-lesioning incubation period. We postulated that inhibition of NF-κB signaling in microglia would reduce overall inflammatory injury in lesioned mice. Subsequent analysis indicated decreased expression of the NF-κB-regulated autophagy gene, sequestosome 1 (p62), in microglia, which is required for targeting ubiquitinated α-synuclein (α-syn) for lysosomal degradation. Knock-out animals had increased accumulation of misfolded α-syn within microglia, despite an overall reduction in neurodegeneration. Interestingly, this occurred more prominently in males. These data suggest that microglia play key biological roles in the degradation and clearance of misfolded α-syn and this process works in concert with the innate immune response associated with neuroinflammation. Importantly, the accumulation of misfolded α-syn protein aggregates alone did not increase neurodegeneration following exposure to rotenone but required the NF-κB-dependent inflammatory response in microglia." @default.
- W4377010947 created "2023-05-19" @default.
- W4377010947 creator A5002274261 @default.
- W4377010947 creator A5033088761 @default.
- W4377010947 creator A5036017665 @default.
- W4377010947 creator A5049962094 @default.
- W4377010947 creator A5058143660 @default.
- W4377010947 creator A5060040709 @default.
- W4377010947 date "2023-05-18" @default.
- W4377010947 modified "2023-10-15" @default.
- W4377010947 title "Microglia‐specific knock‐out of <scp>NF‐κB</scp>/<scp>IKK2</scp> increases the accumulation of misfolded α‐synuclein through the inhibition of p62/<scp>sequestosome</scp>‐1‐dependent autophagy in the rotenone model of Parkinson's disease" @default.
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