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• W2899014551 abstract "Abstract Loss of substantia nigra dopaminergic neurons results in Parkinson disease (PD). Degenerative PD usually presents in the seventh decade whereas genetic disorders, including mutations in PARK2, predispose to early onset PD. PARK2 encodes the parkin E3 ubiquitin ligase which confers pleotropic effects on mitochondrial and cellular fidelity and as a mediator of endoplasmic reticulum (ER) stress signaling. Although the majority of studies investigating ameliorative effects of parkin focus on dopaminergic neurons we found that astrocytes are enriched with parkin. Furthermore, astrocytes deficient in parkin display stress‐induced elevation of nucleotide‐oligomerization domain receptor 2 (NOD2), a cytosolic receptor integrating ER stress and inflammation. Given the neurotropic and immunomodulatory role of astrocytes we reasoned that parkin may regulate astrocyte ER stress and inflammation to control neuronal homeostasis. We show that, in response to ER stress, parkin knockdown astrocytes exhibit exaggerated ER stress, JNK activation and cytokine release, and reduced neurotropic factor expression. In coculture studied we demonstrate that dopaminergic SHSY5Y cells and primary neurons with the presence of parkin depleted astrocytes are more susceptible to ER stress and inflammation‐induced apoptosis than wildtype astrocytes. Parkin interacted with, ubiquitylated and diminished NOD2 levels. Additionally, the genetic induction of parkin ameliorated inflammation in NOD2 expressing cells and knockdown of NOD2 in astrocytes suppressed inflammatory defects in parkin deficient astrocytes and concurrently blunted neuronal apoptosis. Collectively these data identify a role for parkin in modulating NOD2 as a regulatory node in astrocytic control of neuronal homeostasis." @default.
• W2899014551 created "2018-11-09" @default.
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• W2899014551 date "2018-10-30" @default.
• W2899014551 modified "2023-10-05" @default.
• W2899014551 title "Parkin targets NOD2 to regulate astrocyte endoplasmic reticulum stress and inflammation" @default.
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• W2899014551 doi "https://doi.org/10.1002/glia.23482" @default.
• W2899014551 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6275110" @default.
• W2899014551 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30378174" @default.
• W2899014551 hasPublicationYear "2018" @default.
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