TY - JOUR
T1 - Decreased microglial Wnt/β-catenin signalling drives microglial pro-inflammatory activation in the developing brain
AU - Van Steenwinckel, Juliette
AU - Schang, Anne-Laure
AU - Krishnan, Michelle L
AU - Degos, Vincent
AU - Delahaye-Duriez, Andrée
AU - Bokobza, Cindy
AU - Csaba, Zsolt
AU - Verdonk, Franck
AU - Montané, Amélie
AU - Sigaut, Stéphanie
AU - Hennebert, Olivier
AU - Lebon, Sophie
AU - Schwendimann, Leslie
AU - Le Charpentier, Tifenn
AU - Hassan-Abdi, Rahma
AU - Ball, Gareth
AU - Aljabar, Paul
AU - Saxena, Alka
AU - Holloway, Rebecca K
AU - Birchmeier, Walter
AU - Baud, Olivier
AU - Rowitch, David
AU - Miron, Veronique
AU - Chretien, Fabrice
AU - Leconte, Claire
AU - Besson, Valérie C
AU - Petretto, Enrico G
AU - Edwards, A David
AU - Hagberg, Henrik
AU - Soussi-Yanicostas, Nadia
AU - Fleiss, Bobbi
AU - Gressens, Pierre
N1 - © The Author(s) (2019). Published by Oxford University Press on behalf of the Guarantors of Brain. All rights reserved. For permissions, please email: [email protected].
PY - 2019/12
Y1 - 2019/12
N2 - Microglia of the developing brain have unique functional properties but how their activation states are regulated is poorly understood. Inflammatory activation of microglia in the still-developing brain of preterm-born infants is associated with permanent neurological sequelae in 9 million infants every year. Investigating the regulators of microglial activation in the developing brain across models of neuroinflammation-mediated injury (mouse, zebrafish) and primary human and mouse microglia we found using analysis of genes and proteins that a reduction in Wnt/β-catenin signalling is necessary and sufficient to drive a microglial phenotype causing hypomyelination. We validated in a cohort of preterm-born infants that genomic variation in the Wnt pathway is associated with the levels of connectivity found in their brains. Using a Wnt agonist delivered by a blood-brain barrier penetrant microglia-specific targeting nanocarrier we prevented in our animal model the pro-inflammatory microglial activation, white matter injury and behavioural deficits. Collectively, these data validate that the Wnt pathway regulates microglial activation, is critical in the evolution of an important form of human brain injury and is a viable therapeutic target.
AB - Microglia of the developing brain have unique functional properties but how their activation states are regulated is poorly understood. Inflammatory activation of microglia in the still-developing brain of preterm-born infants is associated with permanent neurological sequelae in 9 million infants every year. Investigating the regulators of microglial activation in the developing brain across models of neuroinflammation-mediated injury (mouse, zebrafish) and primary human and mouse microglia we found using analysis of genes and proteins that a reduction in Wnt/β-catenin signalling is necessary and sufficient to drive a microglial phenotype causing hypomyelination. We validated in a cohort of preterm-born infants that genomic variation in the Wnt pathway is associated with the levels of connectivity found in their brains. Using a Wnt agonist delivered by a blood-brain barrier penetrant microglia-specific targeting nanocarrier we prevented in our animal model the pro-inflammatory microglial activation, white matter injury and behavioural deficits. Collectively, these data validate that the Wnt pathway regulates microglial activation, is critical in the evolution of an important form of human brain injury and is a viable therapeutic target.
U2 - 10.1093/brain/awz319
DO - 10.1093/brain/awz319
M3 - Article
C2 - 31665242
SN - 0006-8950
VL - 142
SP - 3806
EP - 3833
JO - Brain : a journal of neurology
JF - Brain : a journal of neurology
IS - 12
ER -