Abstract:
:Secondary progressive multiple sclerosis (SPMS) is an autoimmune disease of the central nervous system (CNS) characterized by progressive motor dysfunction, sensory deficits, and visual problems. The pathological mechanism of SPMS remains poorly understood. In this study, we investigated the role of microglia, immune cells in the CNS, in a secondary progressive form of experimental autoimmune encephalomyelitis (EAE), the mouse model of SPMS. We induced EAE in nonobese diabetic mice and treated the EAE mice with PLX3397, an antagonist of colony stimulating factor-1 receptor, during secondary progression in order to deplete microglia. The results showed that PLX3397 treatment significantly exacerbated secondary progression of EAE and increased mortality rates. Additionally, histological analysis showed that PLX3397 treatment significantly promoted inflammation, demyelination, and axonal degeneration. Moreover, the number of CD4+ T cells in the spinal cord of EAE mice was expanded due to PLX3397-mediated proliferation. These results suggest that microglia suppressed secondary progression of EAE by inhibiting the proliferation of CD4+ T cells in the CNS.
journal_name
Gliajournal_title
Gliaauthors
Tanabe S,Saitoh S,Miyajima H,Itokazu T,Yamashita Tdoi
10.1002/glia.23640subject
Has Abstractpub_date
2019-09-01 00:00:00pages
1694-1704issue
9eissn
0894-1491issn
1098-1136journal_volume
67pub_type
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