Familial Alzheimer's disease mutations in PSEN1 lead to premature human stem cell neurogenesis
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Charles Arber Christopher Lovejoy Lachlan Harris Nanet Willumsen Argyro Alatza Jackie M Casey Georgie Lines Caoimhe Kerins Anika K Mueller Henrik Zetterberg John Hardy Natalie S Ryan Nick C Fox Tammaryn Lashley Selina WrayAbstract
Mutations in presenilin 1 (PSEN1) or presenilin 2 (PSEN2), the catalytic subunit of γ-secretase, cause familial Alzheimer's disease (fAD). We hypothesized that mutations in PSEN1 reduce Notch signaling and alter neurogenesis. Expression data from developmental and adult neurogenesis show relative enrichment of Notch and γ-secretase expression in stem cells, whereas expression of APP and β-secretase is enriched in neurons. We observe premature neurogenesis in fAD iPSCs harboring PSEN1 mutations using two orthogonal systems: cortical differentiation in 2D and cerebral organoid generation in 3D. This is partly driven by reduced Notch signaling. We extend these studies to adult hippocampal neurogenesis in mutation-confirmed postmortem tissue. fAD cases show mutation-specific effects and a trend toward reduced abundance of newborn neurons, supporting a premature aging phenotype. Altogether, these results support altered neurogenesis as a result of fAD mutations and suggest that neural stem cell biology is affected in aging and disease.
Journal details
Journal Cell Reports
Volume 34
Issue number 2
Pages 108615
Available online
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Publisher website (DOI) 10.1016/j.celrep.2020.108615
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Europe PubMed Central 33440141
Pubmed 33440141
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