Journal
NEUROSCIENTIST
Volume 22, Issue 2, Pages 165-170Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/1073858415572079
Keywords
microgliosis; infiltrating cells; microglia; origin; proliferation
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Funding
- National Natural Science Foundation of China [81171174, 31471045]
- Specialized Research Fund for the Doctoral Program of Higher Education [SRFDP: 20130211110002]
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Microgliosis is an intense reaction of CNS microglia to pathogenic insults. One of the characteristic features of microgliosis is an increase in the number of activated microglia at the site of lesion. Ontogenically, microglia are considered to be of mesodermal lineage in the adult CNS, but the origin of the accumulated microglia in pathological conditions remains controversial. Some studies indicate that circulating cells from the bloodstream can infiltrate the CNS and contribute to microglial pool, but some studies suggest that local expansion of reactive microglia is the sole source for parenchymal microglia. Recent data suggest that latent progenitors may also exist in the CNS. Available evidence suggests that multiple sources of microglia may exist under various neurological conditions. In this review, we compare the prevalent views and supporting evidence from different experimental models and provide an overview on the origins of microgliosis.
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