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Microglia depletion exacerbates demyelination and impairs remyelination in a neurotropic coronavirus infection.
Sariol, Alan; Mackin, Samantha; Allred, Merri-Grace; Ma, Chen; Zhou, Yu; Zhang, Qinran; Zou, Xiufen; Abrahante, Juan E; Meyerholz, David K; Perlman, Stanley.
Afiliación
  • Sariol A; Interdisciplinary Program in Immunology, University of Iowa, Iowa City, IA 52242.
  • Mackin S; Department of Microbiology and Immunology, University of Iowa, Iowa City, IA 52242.
  • Allred MG; Interdisciplinary Program in Immunology, University of Iowa, Iowa City, IA 52242.
  • Ma C; School of Mathematics and Statistics, Wuhan University, 430072 Wuhan, China.
  • Zhou Y; School of Mathematics and Statistics, Wuhan University, 430072 Wuhan, China.
  • Zhang Q; School of Mathematics and Statistics, Wuhan University, 430072 Wuhan, China.
  • Zou X; School of Mathematics and Statistics, Wuhan University, 430072 Wuhan, China.
  • Abrahante JE; University of Minnesota Informatics Institute (UMII), Minneapolis, MN 55455.
  • Meyerholz DK; Department of Pathology, University of Iowa, Iowa City, IA 52242.
  • Perlman S; Interdisciplinary Program in Immunology, University of Iowa, Iowa City, IA 52242; stanley-perlman@uiowa.edu.
Proc Natl Acad Sci U S A ; 117(39): 24464-24474, 2020 09 29.
Article en En | MEDLINE | ID: mdl-32929007
ABSTRACT
Microglia are considered both pathogenic and protective during recovery from demyelination, but their precise role remains ill defined. Here, using an inhibitor of colony stimulating factor 1 receptor (CSF1R), PLX5622, and mice infected with a neurotropic coronavirus (mouse hepatitis virus [MHV], strain JHMV), we show that depletion of microglia during the time of JHMV clearance resulted in impaired myelin repair and prolonged clinical disease without affecting the kinetics of virus clearance. Microglia were required only during the early stages of remyelination. Notably, large deposits of extracellular vesiculated myelin and cellular debris were detected in the spinal cords of PLX5622-treated and not control mice, which correlated with decreased numbers of oligodendrocytes in demyelinating lesions in drug-treated mice. Furthermore, gene expression analyses demonstrated differential expression of genes involved in myelin debris clearance, lipid and cholesterol recycling, and promotion of oligodendrocyte function. The results also demonstrate that microglial functions affected by depletion could not be compensated by infiltrating macrophages. Together, these results demonstrate that microglia play key roles in debris clearance and in the initiation of remyelination following infection with a neurotropic coronavirus but are not necessary during later stages of remyelination.
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Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Enfermedades Desmielinizantes / Microglía / Infecciones por Coronavirus / Remielinización Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2020 Tipo del documento: Article

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Enfermedades Desmielinizantes / Microglía / Infecciones por Coronavirus / Remielinización Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2020 Tipo del documento: Article