Abstract
Alzheimer’s disease (AD) is a prevalent neurodegenerative disorder characterized by progressive neuronal damage and cognitive decline. Recent studies have shed light on the involvement of not only the blood-brain barrier (BBB) dysfunction but also significant alterations in cellular junctions in AD pathogenesis. In this review article, we explore the role of the BBB and cellular junctions in AD pathology, with a specific focus on the hippocampus. The BBB acts as a crucial protective barrier between the bloodstream and the brain, maintaining brain homeostasis and regulating molecular transport. Preservation of BBB integrity relies on various junctions, including gap junctions formed by connexins, tight junctions composed of proteins such as claudins, occludin, and ZO-1, as well as adherence junctions involving molecules like vascular endothelial (VE) cadherin, Nectins, and Nectin-like molecules (Necls). Abnormalities in these junctions and junctional components contribute to impaired neuronal signaling and increased cerebrovascular permeability, which are closely associated with AD advancement. By elucidating the underlying molecular mechanisms governing BBB and cellular junction dysfunctions within the context of AD, this review offers valuable insights into the pathogenesis of AD and identifies potential therapeutic targets for intervention.
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The datasets during and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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Keyvan Asghari and Zahra Niknam wrote the main manuscript text and Shadi Mohammadpour-Asl prepared the figure. Leyla Chodari wrote and modified the manuscript. All authors reviewed the manuscript.
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Asghari, K., Niknam, Z., Mohammadpour-Asl, S. et al. Cellular junction dynamics and Alzheimer’s disease: a comprehensive review. Mol Biol Rep 51, 273 (2024). https://doi.org/10.1007/s11033-024-09242-w
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DOI: https://doi.org/10.1007/s11033-024-09242-w