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Current Management and Therapeutic Strategies for Cerebral Amyloid Angiopathy
Yasuteru Inoue1, Yukio Ando2, Yohei Misumi1
1Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-8556, Japan.
Insights
Cerebral amyloid angiopathy (CAA) involves amyloid-beta protein buildup in brain vessels, causing hemorrhages and cognitive decline. Identifying key molecules like apolipoprotein E may lead to new treatments and early diagnostic biomarkers for CAA.
Area of Science:
- Neurology
- Proteomics
- Vascular Biology
Background:
- Cerebral amyloid angiopathy (CAA) is a cerebrovascular disease characterized by amyloid-beta (Aβ) deposition in brain vessels.
- This deposition compromises vessel integrity, leading to lobar intracerebral hemorrhages, cognitive impairment, and transient neurological symptoms.
Purpose of the Study:
- To review the epidemiology, pathology, clinical, and radiological features of CAA.
- To explore recent proteomic findings and identify key molecules involved in CAA pathogenesis.
- To discuss future research directions for CAA therapeutics and biomarkers.
Main Methods:
- Review of existing literature on CAA.
- Analysis of recent advances in mass spectrometry and vascular isolation techniques.
- Identification and discussion of CAA-associated molecules identified through proteomic analyses.
Main Results:
- Proteomic analyses identified key CAA-associated molecules including apolipoprotein E, clusterin, SRPX1, TIMP3, and HTRA1.
- These molecules play critical roles in amyloid-beta cytotoxicity, fibril formation, and cerebral vessel wall remodeling.
- Understanding these molecular interactions is crucial for developing effective CAA therapeutics.
Conclusions:
- Elucidating the precise pathogenesis of CAA is essential for therapeutic development.
- Key identified molecules offer potential targets for novel CAA treatments.
- Further research into these molecular interactions may also yield biomarkers for early CAA diagnosis.
Abstract:
Cerebral amyloid angiopathy (CAA) is characterized by accumulation of amyloid β (Aβ) in walls of leptomeningeal vessels and cortical capillaries in the brain. The loss of integrity of these vessels caused by cerebrovascular Aβ deposits results in fragile vessels and lobar intracerebral hemorrhages. CAA also manifests with progressive cognitive impairment or transient focal neurological symptoms. Although development of therapeutics for CAA is urgently needed, the pathogenesis of CAA remains to be fully elucidated. In this review, we summarize the epidemiology, pathology, clinical and radiological features, and perspectives for future research directions in CAA therapeutics. Recent advances in mass spectrometric methodology combined with vascular isolation techniques have aided understanding of the cerebrovascular proteome. In this paper, we describe several potential key CAA-associated molecules that have been identified by proteomic analyses (apolipoprotein E, clusterin, SRPX1 (sushi repeat-containing protein X-linked 1), TIMP3 (tissue inhibitor of metalloproteinases 3), and HTRA1 (HtrA serine peptidase 1)), and their pivotal roles in Aβ cytotoxicity, Aβ fibril formation, and vessel wall remodeling. Understanding the interactions between cerebrovascular Aβ deposits and molecules that accumulate with Aβ may lead to discovery of effective CAA therapeutics and to the identification of biomarkers for early diagnosis.
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