Abstract:
:Microglia have important remodeling functions in neurodevelopment, aging, and disease, with evidence for molecular diversity. However, the signaling pathways and environmental cues that drive diverse states of microglia are incompletely understood. We profiled microglia of a discrete developing CNS region, the murine retina. We found distinct transcriptional signatures for retinal microglia across development and peak postnatal density of a population that resembles aging and disease-associated microglia (DAM) and CD11c+ microglia of developing white matter. While TREM2 signaling modulates the expression of select genes, the DAM-related signature is significantly reduced in retinas lacking Bax, a proapoptotic factor required for neuronal death. Furthermore, we found postnatal retinal microglia highly expressing CD11c are resistant to loss or inhibition of colony stimulating factor 1 receptor (CSF1R), while most microglia can be eliminated in Bax knockout retina. Thus, developmental apoptosis promotes a microglia gene signature linked to CSF1R independence that shares features with microglia in developing white matter and in disease.
journal_name
Cell Repjournal_title
Cell reportsauthors
Anderson SR,Roberts JM,Zhang J,Steele MR,Romero CO,Bosco A,Vetter MLdoi
10.1016/j.celrep.2019.04.062subject
Has Abstractpub_date
2019-05-14 00:00:00pages
2002-2013.e5issue
7issn
2211-1247pii
S2211-1247(19)30535-2journal_volume
27pub_type
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