SVCT2 Promotes Neural Stem/Progenitor Cells Migration Through Activating CDC42 After Ischemic Stroke

Area of Science:

• Neuroscience
• Regenerative Medicine
• Biochemistry

Background:

• Ischemic stroke is a major cause of death and disability.
• Endogenous neural stem/progenitor cells (NSPCs) can aid brain repair after stroke.
• NSPC migration to injury sites is limited after ischemia.

Purpose of the Study:

• To investigate the therapeutic potential of ascorbic acid (AA) in ischemic stroke.
• To elucidate the mechanism by which AA promotes NSPC migration.
• To explore the role of sodium-vitamin C cotransporter 2 (SVCT2) in stroke recovery.

Main Methods:

• Animal models of ischemic stroke treated with varying doses of AA.
• Immunostaining to quantify NSPC migration in vivo.
• In vitro studies using oxygen-glucose deprivation to assess NSPC migration mechanisms.

Main Results:

• AA treatment significantly improved functional recovery and reduced infarct volume in a dose-dependent manner.
• The optimal therapeutic concentration of AA was determined to be 250 mg/Kg.
• AA treatment and SVCT2 overexpression increased NSPC migration from the subventricular zone (SVZ).
• AA and SVCT2 facilitated NSPC migration by up-regulating CDC42 expression and promoting F-actin assembly.

Conclusions:

• Ascorbic acid enhances functional recovery after ischemic stroke by promoting NSPC migration.
• SVCT2 plays a crucial role in facilitating NSPC migration post-stroke.
• The mechanism involves SVCT2-mediated activation of CDC42, leading to F-actin assembly and enhanced NSPC migration.