| Literature DB >> 32514169 |
Joel W Blanchard1,2, Michael Bula1,2, Jose Davila-Velderrain3,4, Leyla Anne Akay1,2, Lena Zhu1,2, Alexander Frank1,2, Matheus B Victor1,2, Julia Maeve Bonner1,2, Hansruedi Mathys1,2,4, Yuan-Ta Lin1,2, Tak Ko1, David A Bennett5, Hugh P Cam1,2, Manolis Kellis3,4, Li-Huei Tsai6,7,8.
Abstract
In Alzheimer's disease, amyloid deposits along the brain vasculature lead to a condition known as cerebral amyloid angiopathy (CAA), which impairs blood-brain barrier (BBB) function and accelerates cognitive degeneration. Apolipoprotein (APOE4) is the strongest risk factor for CAA, yet the mechanisms underlying this genetic susceptibility are unknown. Here we developed an induced pluripotent stem cell-based three-dimensional model that recapitulates anatomical and physiological properties of the human BBB in vitro. Similarly to CAA, our in vitro BBB displayed significantly more amyloid accumulation in APOE4 compared to APOE3. Combinatorial experiments revealed that dysregulation of calcineurin-nuclear factor of activated T cells (NFAT) signaling and APOE in pericyte-like mural cells induces APOE4-associated CAA pathology. In the human brain, APOE and NFAT are selectively dysregulated in pericytes of APOE4 carriers, and inhibition of calcineurin-NFAT signaling reduces APOE4-associated CAA pathology in vitro and in vivo. Our study reveals the role of pericytes in APOE4-mediated CAA and highlights calcineurin-NFAT signaling as a therapeutic target in CAA and Alzheimer's disease.Entities:
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Year: 2020 PMID： 32514169 PMCID： PMC7704032 DOI： 10.1038/s41591-020-0886-4
Source DB: PubMed Journal: Nat Med ISSN： 1078-8956 Impact factor: 53.440