Adropin confers neuroprotection and promotes functional recovery from ischemic stroke
Yang, C.; Lavayen, B. P.; Liu, L.; Sanz, B. D.; DeMars, K. M.; Larochelle, J.; Pompilus, M.; Febo, M.; Sun, Y.-Y.; Kuo, Y.-M.; Mohamadzadeh, M.; Farr, S. A.; Kuan, C.-Y.; Butler, A. A.; Candelario-Jalil, E.
Show abstract
Adropin is a highly-conserved peptide that has been shown to preserve endothelial barrier function. Blood-brain barrier (BBB) disruption is a key pathological event in cerebral ischemia. However, the effects of adropin on ischemic stroke outcomes remain unexplored. Hypothesizing that adropin exerts neuroprotective effects by maintaining BBB integrity, we investigated the role of adropin in stroke pathology utilizing loss- and gain-of-function genetic approaches combined with pharmacological treatment with synthetic adropin peptide. Stroke decreased endogenous adropin levels in the brain and plasma. Adropin treatment or transgenic adropin overexpression robustly reduced brain injury and improved long-term sensorimotor and cognitive function in young and aged mice subjected to ischemic stroke. In contrast, genetic deletion of adropin exacerbated ischemic brain injury. Mechanistically, adropin neuroprotection depends on endothelial nitric oxide synthase and is associated with reduced BBB permeability and neuroinflammation. We identify adropin as a novel neuroprotective peptide with the potential to improve stroke outcomes.
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