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Cellular cholesterol levels are tightly regulated, and mutations in either\u00a0<jats:italic>NPC1<\/jats:italic> or <jats:italic>NPC2<\/jats:italic> lead to deficient transport and accumulation of unesterified cholesterol in the late endosome\/lysosome compartment, and progressive neurodegeneration in affected individuals. Previous cell-based studies to understand the NPC cellular pathophysiology and screen for therapeutic agents have mainly used patient fibroblasts. However, these do not allow modeling the neurodegenerative aspect of NPC disease, highlighting the need for an in vitro system that permits understanding the cellular mechanisms underlying neuronal loss and identifying appropriate therapies. This study reports the development of a novel human iPSC-derived, inducible neuronal model of\u00a0Niemann-Pick disease, type C1 (NPC1).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>We generated a null i3Neuron (inducible \u00d7 integrated \u00d7 isogenic) (<jats:italic>NPC1<\/jats:italic><jats:sup><jats:italic>\u2212\/\u2212<\/jats:italic><\/jats:sup> i<jats:sup>3<\/jats:sup>Neuron) iPSC-derived neuron model of\u00a0NPC1. The <jats:italic>NPC1<\/jats:italic><jats:sup><jats:italic>\u2212\/\u2212<\/jats:italic><\/jats:sup> and the corresponding isogenic <jats:italic>NPC1<\/jats:italic><jats:sup><jats:italic>+\/+<\/jats:italic><\/jats:sup> i<jats:sup>3<\/jats:sup>Neuron cell lines were used to efficiently generate homogenous, synchronized neurons that can be used in high-throughput screens. <jats:italic>NPC1<\/jats:italic><jats:sup><jats:italic>\u2212\/\u2212<\/jats:italic><\/jats:sup> i<jats:sup>3<\/jats:sup>Neurons recapitulate cardinal cellular NPC1 pathological features including perinuclear endolysosomal storage of unesterified cholesterol, accumulation of GM2 and GM3 gangliosides, mitochondrial dysfunction, and impaired axonal lysosomal transport. Cholesterol storage, mitochondrial dysfunction, and axonal trafficking defects can be ameliorated by treatment with 2-hydroxypropyl-\u03b2-cyclodextrin, a drug that has shown efficacy in NPC1 preclinical models and in a phase 1\/2a trial.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Our data demonstrate the utility of this new cell line in high-throughput drug\/chemical screens to identify potential therapeutic agents. The <jats:italic>NPC1<\/jats:italic><jats:sup><jats:italic>\u2212\/\u2212<\/jats:italic><\/jats:sup> i<jats:sup>3<\/jats:sup>Neuron line will also be a valuable tool for the NPC1 research community to explore the pathological mechanisms contributing to neuronal degeneration.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Graphical abstract<\/jats:title>\n                \n              <\/jats:sec>","DOI":"10.1186\/s12915-021-01133-x","type":"journal-article","created":{"date-parts":[[2021,10,1]],"date-time":"2021-10-01T01:14:11Z","timestamp":1633050851000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["A human iPSC-derived inducible neuronal model of Niemann-Pick disease, type C1"],"prefix":"10.1186","volume":"19","author":[{"given":"Anika V.","family":"Prabhu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Insung","family":"Kang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raffaella","family":"De Pace","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2524-1420","authenticated-orcid":false,"given":"Christopher A.","family":"Wassif","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hideji","family":"Fujiwara","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pamela","family":"Kell","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuntian","family":"Jiang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel S.","family":"Ory","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan S.","family":"Bonifacino","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael E.","family":"Ward","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Forbes D.","family":"Porter","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,10,1]]},"reference":[{"issue":"1","key":"1133_CR1","doi-asserted-by":"publisher","first-page":"16","DOI":"10.1186\/1750-1172-5-16","volume":"5","author":"MT Vanier","year":"2010","unstructured":"Vanier MT. 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