Article
Clinical Neurology
Yasuo Miki, Kunikazu Tanji, Kana Shinnai, Makoto T. Tanaka, Firat Altay, Sandrine C. Foti, Catherine Strand, Takanori Sasaki, Tomoya Kon, Shuji Shimoyama, Tomonori Furukawa, Haruo Nishijima, Hiromi Yamazaki, Yasmine T. Asi, Conceicao Bettencourt, Zane Jaunmuktane, Mari Tada, Fumiaki Mori, Hiroki Mizukami, Masahiko Tomiyama, Hilal A. Lashuel, Tammaryn Lashley, Akiyoshi Kakita, Helen Ling, Andrew J. Lees, Janice L. Holton, Thomas T. Warner, Koichi Wakabayashi
Summary: This study investigated how abnormal alpha-synuclein in the hippocampus leads to memory impairment in multiple system atrophy (MSA). The results suggest that increased alpha-synuclein oligomers may be a pathological cause of memory impairment in MSA.
NEUROPATHOLOGY AND APPLIED NEUROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Francesco De Nuccio, Marianna Kashyrina, Francesca Serinelli, Florent Laferriere, Dario Domenico Lofrumento, Francesca De Giorgi, Francois Ichas
Summary: alpha-Synucleinopathies are neurodegenerative disorders characterized by the accumulation of insoluble alpha-Synuclein fibrils. These fibrils can form Lewy bodies in somata and Lewy neurites in neuronal processes. In multiple system atrophy, alpha-Synuclein aggregates are found in mature oligodendrocytes, but the origin of these aggregates is still unknown.
Article
Clinical Neurology
Margaux Teil, Sandra Dovero, Mathieu Bourdenx, Marie-Laure Arotcarena, Sandrine Camus, Gregory Porras, Marie-Laure Thiolat, Ines Trigo-Damas, Celine Perier, Cristina Estrada, Nuria Garcia-Carrillo, Michele Morari, Wassilios G. Meissner, Maria Trinidad Herrero, Miquel Vila, Jose A. Obeso, Erwan Bezard, Benjamin Dehay
Summary: Synucleinopathies, including Parkinson's disease, dementia with Lewy bodies and multiple system atrophy, are characterized by the deposit of alpha-synuclein aggregates in neurons and glial cells. A study found that inoculating brain fractions containing glial cytoplasmic inclusions from multiple system atrophy patients into non-human primates resulted in neurodegeneration, oligodendrocyte loss, demyelination, neuroinflammation and alpha-synuclein pathology. These findings suggest the potential use of this experimental model for multiple system atrophy research and therapy development.
Article
Clinical Neurology
Taku Homma, Yoko Mochizuki, Shinsuke Tobisawa, Takashi Komori, Kazushi Takahashi
Summary: Despite existing reports on hippocampal pathologies in multiple system atrophy (MSA) and their association with dementia, no studies have compared the clinical and pathological differences between MSA patients with and without neuronal cytoplasmic inclusions (NCIs) in the dentate gyrus. This study investigated the NCI pathology in 18 MSA patient autopsies and found that MSA patients with dntNCIs had longer survival, higher frequency of dementia, and lower brain weights compared to those without dntNCIs. Understanding these differences could lead to improved personalized management strategies.
JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY
(2023)
Review
Neurosciences
Kreesan Reddy, Birger Victor Dieriks
Summary: This article discusses the evidence for MSA-specific alpha-Syn strains, proposes possible causes for strain formation, and explores the interactions between oligodendrocytes, neurons, and alpha-Syn, as well as the impact of additional variables.
MOLECULAR NEURODEGENERATION
(2022)
Article
Clinical Neurology
Fumiaki Mori, Yasuo Miki, Kunikazu Tanji, Tomoya Kon, Masahiko Tomiyama, Akiyoshi Kakita, Koichi Wakabayashi
Summary: The reduction of VAPB in MSA patients is implicated in the disease process, and vesicular structures are associated with inclusion formation.
Article
Neurosciences
Koichi Wakabayashi, Yasuo Miki, Kunikazu Tanji, Fumiaki Mori
Summary: Multiple system atrophy (MSA) is a fatal disease characterized by the aggregation of alpha-synuclein in oligodendrocytes, with uncertain origin. There are two degenerative processes in MSA, one related to the impairment of oligodendrocytes and the other related to neuronal inclusion pathology. Both oligodendrocytes and neurons are affected in MSA, with damage of one contributing to the degeneration of the other. Vesicle-mediated transport plays a key role in the nuclear translocation of alpha-synuclein and the formation of glial and neuronal alpha-synuclein inclusions. Impairment of autophagy may be associated with alpha-synuclein accumulation in the brain of MSA and Lewy body disease.
Review
Biochemistry & Molecular Biology
Kurt A. Jellinger, Gregor K. Wenning, Nadia Stefanova
Summary: Multiple system atrophy (MSA) is a rapidly progressive neurodegenerative disease with a complex clinical presentation. It shares molecular similarities with Parkinson's disease but presents unique pathological features. The debate over whether it should be classified as a prion disease or its potential human transmission remains unresolved.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Clinical Neurology
Sara A. M. Holec, Jisoo Lee, Abby Oehler, Felicia K. Ooi, Daniel A. Mordes, Steven H. Olson, Stanley B. Prusiner, Amanda L. Woerman
Summary: This study demonstrates that MSA prions can transmit neurological disease to mice expressing wild-type SNCA in a sex-dependent manner. The transmission of MSA prions shows distinct biological activities compared to the transmission of WT preformed fibrils.
ACTA NEUROPATHOLOGICA
(2022)
Review
Clinical Neurology
Shengri Cong, Chunchen Xiang, Hailong Wang, Shuyan Cong
Summary: This meta-analysis identified several biomarkers that can distinguish patients with multiple system atrophy from healthy individuals, including reduced phosphorylated tau and alpha-synuclein. Additionally, three biomarkers (alpha-syn, NFL, and t-tau) were found to be useful in differentiating between MSA and Parkinson's disease, which could improve early diagnosis and diagnostic accuracy for MSA.
JOURNAL OF NEUROLOGY
(2021)
Article
Clinical Neurology
Teresa Torre-Muruzabal, Anke van der Perren, Audrey Coens, Geraldine Gelders, Anna Barber Janer, Sara Camacho-Garcia, Therese Klingstedt, Peter Nilsson, Nadia Stefanova, Ronald Melki, Veerle Baekelandt, Wouter Peelaerts
Summary: This study found that the progression of multiple system atrophy is influenced by different types of alpha Syn strains. Alpha Syn strains impact disease progression through oligodendroglial, neurotoxic, and immune-related mechanisms, leading to neurodegeneration and brain atrophy. The activation of microglial cells is associated with the structural features of alpha Syn strains.
Article
Clinical Neurology
An Cheng, Ichiro Kawahata, Yifei Wang, Wenbin Jia, Haoyang Wang, Tomoki Sekimori, Yi Chen, Hiroyoshi Suzuki, Atsushi Takeda, Nadia Stefanova, David Finkelstein, Wenbo Ma, Min Chen, Takuya Sasaki, Kohji Fukunaga
Summary: Multiple system atrophy (MSA) is a neurodegenerative disease characterized by accumulation of misfolded a-synuclein (aSyn) and myelin disruption. This study identified epsin-2 as a potential regulator of aSyn propagation in MSA brains, suggesting epsin-2 as a novel therapeutic target for MSA.
Article
Clinical Neurology
Boram Kim, Bailey Mikytuck, Eunran Suh, Garrett S. Gibbons, Vivianna M. Van Deerlin, Sanjeev N. Vaishnavi, Meredith A. Spindler, Lauren Massimo, Murray Grossman, John Q. Trojanowski, David J. Irwin, Edward B. Lee
Summary: The study found that Gosuranemab treatment did not lead to clearance of neuropathologic FTLD-tau inclusions, but did induce changes including the presence of perivascular vesicular astrocytes (PVA) with tau accumulation within lysosomes. These results suggest that Gosuranemab may be associated with a glial response involving tau accumulation within astrocytic lysosomes.
ACTA NEUROPATHOLOGICA
(2021)
Article
Clinical Neurology
Takashi Ando, Yuichi Riku, Akio Akagi, Hiroaki Miyahara, Mitsuaki Hirano, Toshimasa Ikeda, Hiroyuki Yabata, Ryuichi Koizumi, Chisato Oba, Saori Morozumi, Keizo Yasui, Atsuko Goto, Taiji Katayama, Satoko Sakakibara, Ikuko Aiba, Motoko Sakai, Masaaki Konagaya, Keiko Mori, Yasuhiro Ito, Hiroyuki Yuasa, Masayo Nomura, Kristine Joyce L. Porto, Jun Mitsui, Shoji Tsuji, Maya Mimuro, Yoshio Hashizume, Masahisa Katsuno, Yasushi Iwasaki, Mari Yoshida
Summary: In this study, MSA patients with prominent hippocampal involvement showed specific demographic and clinical characteristics. The severe hippocampal pathology seen in these patients suggests a potential pathological variant of MSA characterized by neuronal alpha-synucleinopathy.
Review
Cell Biology
Jen-Hsiang T. Hsiao, Onur Tanglay, Anne A. Li, Aysha Y. G. Strobbe, Woojin Scott Kim, Glenda M. Halliday, YuHong Fu
Summary: Multiple system atrophy (MSA) is a debilitating movement disorder with unknown etiology. It presents with characteristic parkinsonism and/or cerebellar dysfunction due to deterioration in specific brain regions. The early pathological events and development mechanisms of MSA are reviewed, focusing on the involvement of oligodendrocyte lineage cells and alpha-synuclein. This understanding will guide future research in MSA.