Reconstruction of the human blood–brain barrier in vitro reveals a pathogenic mechanism of APOE4 in pericytes
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 ( APO E4 ) is the strongest risk factor for CAA, yet the mechan...
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Published in | Nature medicine Vol. 26; no. 6; pp. 952 - 963 |
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Main Authors | , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Nature Publishing Group US
01.06.2020
Nature Publishing Group |
Subjects | |
Online Access | Get full text |
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Summary: | 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 (
APO
E4
) 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.
An iPSC-based three-dimensional model of the human blood–brain barrier reveals that NFAT and APOE dysregulation in pericyte-like mural cells contributes to cerebral amyloid angiopathy and can potentially be targeted to treat Alzheimer’s disease. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 J.W.B. and L.-H.T. conceived of the study. J.W.B., M.B., L.A.A., L.Z., A.F., M.B.V., and J.M.B. performed experiments and analyzed results. H.P.C. performed RNA-seq genomic alignments and DEG analysis. J.D.-V. and H.M. performed and analyzed the snRNAseq experiments. Y.-T.L. generated isogenic and knockout APOE lines. T.K. generated the iPSC lines used in this study. J.W.B, L.-H.T., and H.P.C. wrote and revised manuscript. Author contributions |
ISSN: | 1078-8956 1546-170X 1546-170X |
DOI: | 10.1038/s41591-020-0886-4 |