Abstract:
:The role of microglia in spinal cord injury (SCI) remains poorly understood and is often confused with the response of macrophages. Here, we use specific transgenic mouse lines and depleting agents to understand the response of microglia after SCI. We find that microglia are highly dynamic and proliferate extensively during the first two weeks, accumulating around the lesion. There, activated microglia position themselves at the interface between infiltrating leukocytes and astrocytes, which proliferate and form a scar in response to microglia-derived factors, such as IGF-1. Depletion of microglia after SCI causes disruption of glial scar formation, enhances parenchymal immune infiltrates, reduces neuronal and oligodendrocyte survival, and impairs locomotor recovery. Conversely, increased microglial proliferation, induced by local M-CSF delivery, reduces lesion size and enhances functional recovery. Altogether, our results identify microglia as a key cellular component of the scar that develops after SCI to protect neural tissue.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Bellver-Landete V,Bretheau F,Mailhot B,Vallières N,Lessard M,Janelle ME,Vernoux N,Tremblay MÈ,Fuehrmann T,Shoichet MS,Lacroix Sdoi
10.1038/s41467-019-08446-0subject
Has Abstractpub_date
2019-01-31 00:00:00pages
518issue
1issn
2041-1723pii
10.1038/s41467-019-08446-0journal_volume
10pub_type
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