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- W2980572241 abstract "Recent compelling genetic evidence has identified genes involved in endocytosis and vesicular trafficking including SORL1 as AD risk genes. Decreased expression of SORLA has been repeatedly observed in postmortem human AD brains especially in late onset sporadic AD (SAD) which is the most common form of AD. Eventually, several studies linked SORLA expression with production and deposition of the pathogenic protein β amyloid peptide which is one of the hallmarks of AD pathogenesis. However, most of these studies were done using mouse models and non-human cell lines and role of SORLA in amyloid β production in human neural cells remains unclear. SORL1 was overexpressed in clonal populations of human pluripotent stem cells (hiPSCs) using the piggybac transposon system. Control and SORL1overexpressed hiPSCs were then differentiated into neural cells. Amount of Aβ-40 and Aβ-42 released was measured using ELISA in hiPSC derived neural cells. Additionally, intra-cellular trafficking was examined using immunocytochemistry and cell biology assays. Specifically, to assess transport into lysosomes, pH sensitive fluorescent dye Phrodo conjugated with Aβ was used. Overexpression of SORL1 in hiPSC derived human neural cells resulted in decreased Aβ-40 and Aβ-42 released into media as measured by ELISA. This decrease can be caused by a possible increase in Aβ transport into lysosomes for degradation. In support of this idea, increased Aβ transport into lysosomes was observed in SORL1 overexpressed neural cells as compared to control cells using the Phrodo assay. Decreased Aβ release could also result from increased degradation of Amyloid precursor protein (APP). In support of this hypothesis, we showed increased colocalization of APP with a lysosomal marker, Lysosome associated membrane protein (LAMP1) using immunocytochemistry. Overall, these results suggest that overexpression of SORL1 could lead to decreased amyloid β production in part due to increased transport of Aβ and APP into lysosomes for degradation in human neural cells. Our findings reveal a previously unidentified role of SORL1 in hiPSC derived neural cells, information that may be useful in exploring not just SORLA, but other sorting receptors expressed in human neurons as therapeutic targets for AD." @default.
- W2980572241 created "2019-10-25" @default.
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- W2980572241 date "2019-07-01" @default.
- W2980572241 modified "2023-09-28" @default.
- W2980572241 title "P4-475: INVESTIGATING THE ROLE OF SORTILIN-RELATED RECEPTOR (SORL1 /SORLA) IN HUMAN INDUCED PLURIPOTENT STEM CELL DERIVED NEURAL CELLS AS A THERAPEUTIC TARGET FOR ALZHEIMER'S DISEASE" @default.
- W2980572241 doi "https://doi.org/10.1016/j.jalz.2019.08.021" @default.
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