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Familial Alzheimer disease mutation identifies novel role of SORLA in release of neurotrophic exosomes

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Item Type:Article
Title:Familial Alzheimer disease mutation identifies novel role of SORLA in release of neurotrophic exosomes
Creators Name:Juul-Madsen, Kristian, Rudolph, Ina-Maria, Gomes, Jemila P., Meyer, Katrina, Ovesen, Peter L., Gorniak-Walas, Malgorzata, Kokoli, Marianna, Telugu, Narasimha S., vonTangen Sivertsen, Malthe, Febbraro, Fabia, Sutherland, Duncan S., Palmfeldt, Johan, Diecke, Sebastian, Andersen, Olav M., Selbach, Matthias and Willnow, Thomas E.
Abstract:INTRODUCTION: Mutations in SORL1, encoding the sorting receptor Sortilin-related receptor with A-type repeats (SORLA), are found in individuals with Alzheimer's disease (AD). We studied SORLA(N1358S), carrying a mutation in its ligand binding domain, to learn more about receptor functions relevant for human brain health. METHODS: We investigated consequences of SORLA(N1358S) expression in induced pluripotent stem cell (iPSC)-derived human neurons and microglia, using unbiased proteome screens and functional cell assays. RESULTS: We identified alterations in the SORLA(N1358S) interactome linked to biogenesis of exosomes. Consequently, the mutant receptor failed to promote release and neurotrophic qualities of exosomes, a defect attributed to altered exosomal content of microRNAs controlling neuronal maturation. DISCUSSION: We identified a role for SORLA in controlling quantity and neurotrophic quality of exosomes secreted by cells, suggesting impaired cellular cross talk through exosomes as a pathological trait contributing to AD pathology in carriers of SORL1 variants.
Keywords:Alzheimer’s Disease, Exosomes, IPSC Models, Microglia, Multi-Omics
Source:Alzheimer's & Dementia
ISSN:1552-5260
Publisher:Wiley
Volume:21
Number:9
Page Range:e70591
Date:10 September 2025
Official Publication:https://doi.org/10.1002/alz.70591
PubMed:View item in PubMed

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