Current evidence of synaptic dysfunction after stroke: Cellular and molecular mechanisms

Area of Science:

• Neuroscience
• Cerebrovascular Disease Research
• Synaptic Plasticity

Background:

• Stroke, encompassing ischemic and hemorrhagic types, damages brain tissue by disrupting blood flow.
• Post-stroke, increased blood-brain barrier permeability, inflammation, and edema contribute to neuronal cell death and synaptic dysfunction.
• Synaptic dysfunction after stroke involves structural damage, protein accumulation, impaired vesicle release, mitochondrial transport issues, glial cell activation, and reduced synapse formation.

Approach:

• This review synthesizes recent research on the cellular and molecular mechanisms underlying synaptic changes post-stroke.
• It examines the protective effects of pharmacological interventions and rehabilitation therapies on synapses in stroke models.
• The focus is on understanding the intricate relationship between stroke pathology and synaptic integrity.

Key Points:

• Stroke initiates a cascade of events that compromise synaptic structure and function.
• Mechanisms include direct neuronal damage, glial-mediated responses, and disruptions in synaptic vesicle dynamics.
• Restoring synaptic health is crucial for neurological recovery after stroke.

Conclusions:

• Understanding stroke-induced synaptic dysfunction is critical for developing effective treatments.
• Targeting synaptic protection and repair offers promising avenues for enhancing stroke recovery.
• Further research into therapeutic strategies is essential for improving long-term neurological outcomes.