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- W4310907103 abstract "Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by the selective degeneration of motor neurons (MNs). In the MNs of patients with ALS, adenosine deaminase acting on RNA 2 (ADAR2)-mediated RNA editing of GluA2 mRNA at the Q/R site is profoundly deficient. In genetically modified mice (ADAR2flox/flox/VAChT-Cre.Fast; AR2), the selective knockout of ADAR2 in cholinergic neurons induced progressive loss of lower MNs. MNs exhibiting an age-related increase in abnormal TDP-43 localization and reduced ADAR2 immunoreactivity are localized in the lateral areas of the anterior horns (AHs) in aged wild-type mice. However, the patterns in the AHs of AR2 mice remain unknown. In this study, we investigated whether similar degeneration is observed in AR2 mice. We compared the number of astrocytes and MNs in the lateral and medial AHs of the lumbar spinal cord of 12-month-old AR2 mice with age-matched wild-type mice. The number of MNs significantly decreased in both the lateral and medial areas in AR2 mice AHs, particularly in the former. The number of reactive astrocytes increased significantly in the lateral areas of the AHs of AR2 mice. In conclusion, stronger activation of astrocytes with reduction of MNs in the ADAR2 deficiency-related lateral area increases in AR2 mice AHs. Fast fatigable MNs are expected to be present in the lateral area of the AHs. We found that MN death is more common in the lateral area of AHs associated with FF MNs due to differences in vulnerability to MN under ADAR2 deficiency." @default.
- W4310907103 created "2022-12-20" @default.
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- W4310907103 date "2023-01-01" @default.
- W4310907103 modified "2023-10-06" @default.
- W4310907103 title "Pathological features of glial cells and motor neurons in the anterior horn of the spinal cord in sporadic ALS using ADAR2 conditional knockout mice" @default.
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- W4310907103 doi "https://doi.org/10.1016/j.jns.2022.120520" @default.
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