Extracellular vesicles enriched with miR-486 from Tetramethylpyrazine-preconditioned bone marrow mesenchymal stem cells promote microglia/macrophage M2 polarization and enhance neurogenesis in rats with ischemic stroke.

ABSTRACT: Bone marrow mesenchymal stem cell-derived extracellular vesicles (BMSC-EVs) show therapeutic promise for ischemic stroke (IS). Preconditioning MSCs with drugs can modulate the cargo composition and function of their derived EVs. This study investigated the therapeutic effects and underlying mechanisms of EVs derived from tetramethylpyrazine (TMP)-preconditioned BMSCs (TMP-BMSC-EVs) in IS. EVs were isolated from BMSCs pretreated with or without TMP by differential centrifugation. The therapeutic efficacy of EVs was evaluated in a rat model of middle cerebral artery occlusion (MCAO) through neurological function assessments and infarct volume quantification. The expression of miR-486 and its roles in regulating microglia/macrophage polarization and neurogenesis, as well as the mechanistic ta

SUBMITTER: Mao S 

PROVIDER: S-EPMC12382071 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature