[Pathogenesis and pathophysiology of ischemic leukoencephalopathy]

Area of Science:

• Neuroscience
• Cerebrovascular Medicine
• Neuropathology

Context:

• Cerebral white matter is vulnerable to ischemic injury due to its vascular supply.
• Binswanger type dementia pathogenesis involves hypertension, blood pressure variability, and cerebral arteriole resistance.
• Alzheimer type dementia exhibits distinct patterns of cerebral blood flow reduction and neurotransmitter metabolism impairment.

Purpose:

• To investigate the pathogenetic factors and regional cerebral blood flow (CBF) and metabolism differences between Binswanger type dementia and Alzheimer type dementia.
• To elucidate the role of hypoperfusion and neurotransmitter metabolism in the frontal and parietal areas in these dementias.

Summary:

• Hypertension and related vascular factors contribute to Binswanger type dementia.
• Binswanger type dementia shows frontal hypoperfusion and impaired dopamine metabolism.
• Alzheimer type dementia demonstrates parietal hypoperfusion and impaired noradrenaline metabolism.

Impact:

• Findings suggest frontally-dominant neurological dysfunctions in Binswanger type dementia.
• Differentiates Binswanger type dementia from Alzheimer type dementia based on neurochemical and hemodynamic profiles.
• Highlights the importance of vascular health in preventing white matter dementia.