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Endothelial NMDA receptors mediate activity-dependent brain hemodynamic responses in mice
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Endothelial NMDA receptors mediate activity-dependent brain hemodynamic responses in mice
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Endothelial NMDA receptors mediate activity-dependent brain hemodynamic responses in mice
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Journal Article
Endothelial NMDA receptors mediate activity-dependent brain hemodynamic responses in mice
2019
Overview
Dynamic coupling of blood supply with energy demand is a natural brain property that requires signaling between synapses and endothelial cells. Our previous work showed that cortical arteriole lumen diameter is regulated by N-methyl-D-aspartate receptors (NMDARs) expressed by brain endothelial cells. The purpose of this study was to determine whether endothelial NMDARs (eNMDARs) regulate functional hyperemia in vivo. In response to whisker stimulation, regional cerebral blood flow (rCBF) and hemo-dynamic responses were assessed in barrel cortex of awake wild-type or eNMDAR loss-of-function mice using two-photon microscopy. Hyperemic enhancement of rCBF and vasodilation throughout the vascular network was observed in wild-type mice. eNMDAR loss of function reduced hyperemic responses in rCBF and plasma flux in individual vessels. Discovery of an endothelial receptor that regulates brain hyperemia provides insight into how neuronal activity couples with endothelial cells.
Publisher
National Academy of Sciences
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