Jasminoidin reduces ischemic stroke injury by regulating microglia polarization via PASK‐EEF1A1 axis

Abstract Jasminoidin (JAS) can alleviate ischemic stroke (IS) injury, but its molecular mechanism remains undefined. The polarization of microglia affects IS process. This research is powered to probe whether the molecular mechanism of JAS for IS treatment is coupled with microglia polarization. IS modeling in mice was accomplished by middle cerebral artery occlusion (MCAO) and model mice were injected with 25 and 50 mg/mL JAS, followed by determination of infarct volume, brain water content, and histological changes in mouse brains. The microglia modeling was performed by 1‐h oxygen–glucose deprivation and 24‐h reoxygenation. Oxygen–glucose deprivation/reoxygenation (OGD/R)‐induced microglia were treated with JAS and transfected with Per‐Arnt‐Sim kinase (PASK)‐overexpressing plasmid, subsequent to which cell viability and lactate dehydrogenase (LDH) level were determined. The mRNA or protein expressions of examined genes in microglia and brain tissues were detected by quantitative real‐time polymerase chain reaction or western blot. MCAO‐induced massive infarction, edema, and injury in mouse brain tissues, upregulated interleukin‐1 beta (IL‐1β), FcγRIIB (CD32), tumor necrosis factor alpha (TNF‐α), PASK, p‐eukaryotic elongation factor 1A1 (EEF1A1), and p‐EEF1A1/EEF1A1 levels, but downregulated mannose receptor 1 (CD206), arginase‐1 (Arg‐1) and interleukin‐10 (IL‐10), and EEF1A1 expressions, which was reversed by JAS. OGD/R treatment decreased microglial viability as well as expressions of CD206, Arg‐1, IL‐10, and EEF1A1, yet increased cytotoxicity and levels of IL‐1β, CD32, TNF‐α, PASK, p‐EEF1A1, and p‐EEF1A1/EEF1A1, which was reversed by JAS. PASK overexpression reversed the effects of JAS on microglia. JAS reduces IS injury by regulating microglia polarization via PASK‐EEF1A1 axis.