Neuronal melatonin type 1 receptor overexpression promotes M2 microglia polarization in cerebral ischemia/reperfusion-induced injury.

Microglial activation is readily detected following cerebral ischemia/reperfusion-induced injury. Activated microglia polarize into either classic pro-inflammatory M1 or protective M2 microglia following ischemia/reperfusion-induced injury. Melatonin is protective immediately after ischemia/reperfusion-induced brain injury.