VEGF-Mediated Cognitive and Synaptic Improvement in Chronic Cerebral Hypoperfusion Rats Involves Autophagy Process

Area of Science:

• Neuroscience
• Cell Biology

Background:

• Chronic cerebral hypoperfusion (CCH) is linked to cognitive impairment in neurodegenerative diseases.
• Vascular Endothelial Growth Factor (VEGF) shows promise in cognitive protection during ischemia, but mechanisms are unclear.
• The role of autophagy in CCH-induced cognitive dysfunction and its link to synaptic function require further investigation.

Purpose of the Study:

• To investigate the synaptic mechanisms underlying cognitive impairment in CCH.
• To determine the role of autophagy in CCH-induced synaptic dysfunction.
• To elucidate the therapeutic potential of VEGF in mitigating CCH-related cognitive deficits.

Main Methods:

• In vivo electrophysiological recordings to assess hippocampal synaptic function.
• Western blot assays to measure synaptic protein levels.
• Morris water maze test to evaluate spatial learning and memory.
• Autophagy markers were analyzed to assess autophagic activity.

Main Results:

• CCH significantly impaired spatial cognition and hippocampal synaptic function, including plasticity and transmission.
• VEGF administration mitigated CCH-induced synaptic deficits and normalized synaptic protein levels.
• CCH led to excessive autophagy, which was inhibited by VEGF treatment.
• VEGF improved spatial learning and memory in the CCH model.

Conclusions:

• VEGF ameliorates cognitive impairment in CCH by restoring synaptic function.
• VEGF's protective effects are mediated, in part, by inhibiting excessive autophagy.
• VEGF represents a promising therapeutic target for neurodegenerative diseases associated with CCH.