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- W2004758931 abstract "Multiple system atrophy (MSA) and Parkinson's disease (PD) are classified as synucleinopathies that exhibit α-synuclein deposition in the central nervous system. Recently, activation of the unfolded protein response (UPR), which is a cellular stress response triggered by endoplasmic reticulum (ER) stress, was reported in PD and involvement of ER stress was indicated for this disease. To elucidate whether ER stress is also implicated in the pathology of MSA, we performed a series of immunohistochemical studies using MSA brain sections. Here, we showed the presence of an activated UPR response in oligodendroglia of postmortem MSA brains. The UPR protein-positive structures were observed in lesions where glial cytoplasmic inclusions (GCIs) appeared and colocalized highly in cells showing oligodendrocytic characteristics in the presence of α-synuclein inclusions. The UPR protein-positive structures appeared as granular shapes that are morphologically similar to granulovacuolar degeneration (GVD) and colocalized with GVD marker proteins. Double immunohistochemistry demonstrated that some of the activated UPR protein-positive structures were localized in oligodendrocytes that contained GCIs with faint α-synuclein labeling, without ubiquitination, and showing a strong correlation with the relocation of the tubulin polymerization-promoting protein (TPPP/p25α). These findings suggest that activation of the UPR may be induced at the early stage of the disease process, thus playing a pivotal role in the pathology of MSA." @default.
- W2004758931 created "2016-06-24" @default.
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- W2004758931 date "2010-10-01" @default.
- W2004758931 modified "2023-09-23" @default.
- W2004758931 title "Involvement of endoplasmic reticulum stress defined by activated unfolded protein response in multiple system atrophy" @default.
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- W2004758931 doi "https://doi.org/10.1016/j.jns.2010.06.019" @default.
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