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Using Retinal Imaging to Study Dementia
Published on: November 6, 2017
Microvascular changes in the white mater in dementia
William R Brown1, Dixon M Moody, Clara R Thore
1Department of Radiology, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA. wibrown@wfubmc.edu
Journal of the Neurological Sciences
|March 10, 2009
Summary
Researchers identified lipid microemboli as a cause of vascular dementia and found periventricular venous collagenosis contributes to leukoaraiosis. Unique methods revealed new details about brain microvascular pathology.
Area of Science:
- Neurology
- Pathology
- Vascular Biology
Background:
- The brain microvasculature's role in neurological diseases is complex.
- Standard techniques often overlook specific microvascular details.
- Unique methodologies offer novel insights into brain pathology.
Purpose of the Study:
- To investigate understudied aspects of the brain microvascular system.
- To elucidate the pathological mechanisms underlying vascular dementia and leukoaraiosis.
- To explore potential genetic predispositions and developmental processes in microvascular changes.
Main Methods:
- Utilized large, thick celloidin sections for 3D vascular network visualization.
- Employed alkaline phosphatase (AP) staining to differentiate afferent and efferent vessels.
- Examined brain tissue from patients with cardiac surgery, elderly subjects, and preterm infants.
Main Results:
- Identified millions of lipid microemboli in post-cardiac surgery brains, linking them to vascular dementia.
- Discovered periventricular venous collagenosis (PVC) associated with leukoaraiosis (LA), particularly in older individuals.
- Observed capillary loss, string vessel formation, and tortuous arterioles in deep white matter, with implications for LA pathogenesis.
Conclusions:
- Lipid microemboli are a significant cause of vascular dementia.
- Periventricular venous collagenosis contributes to chronic ischemia and leukoaraiosis.
- Capillary dynamics, including loss and string vessel formation, are crucial in white matter diseases and warrant further investigation into regulatory mechanisms.
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