{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T19:35:34Z","timestamp":1791920134020,"version":"4.3.4"},"reference-count":149,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2021,6,12]],"date-time":"2021-06-12T00:00:00Z","timestamp":1623456000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000065","name":"National Institute of Neurological Disorders and Stroke","doi-asserted-by":"publisher","award":["R21NS109837"],"award-info":[{"award-number":["R21NS109837"]}],"id":[{"id":"10.13039\/100000065","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000065","name":"National Institute of Neurological Disorders and Stroke","doi-asserted-by":"publisher","award":["R01NS118066"],"award-info":[{"award-number":["R01NS118066"]}],"id":[{"id":"10.13039\/100000065","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100017026","name":"Spastic Paraplegia Foundation","doi-asserted-by":"publisher","award":["2019"],"award-info":[{"award-number":["2019"]}],"id":[{"id":"10.13039\/100017026","id-type":"DOI","asserted-by":"publisher"}]},{"name":"The Blazer Foundation","award":["2016"],"award-info":[{"award-number":["2016"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pharmaceuticals"],"abstract":"<jats:p>Motor neurons are large projection neurons classified into upper and lower motor neurons responsible for controlling the movement of muscles. Degeneration of motor neurons results in progressive muscle weakness, which underlies several debilitating neurological disorders including amyotrophic lateral sclerosis (ALS), hereditary spastic paraplegias (HSP), and spinal muscular atrophy (SMA). With the development of induced pluripotent stem cell (iPSC) technology, human iPSCs can be derived from patients and further differentiated into motor neurons. Motor neuron disease models can also be generated by genetically modifying human pluripotent stem cells. The efficiency of gene targeting in human cells had been very low, but is greatly improved with recent gene editing technologies such as zinc-finger nucleases (ZFN), transcription activator-like effector nucleases (TALEN), and CRISPR-Cas9. The combination of human stem cell-based models and gene editing tools provides unique paradigms to dissect pathogenic mechanisms and to explore therapeutics for these devastating diseases. Owing to the critical role of several genes in the etiology of motor neuron diseases, targeted gene therapies have been developed, including antisense oligonucleotides, viral-based gene delivery, and in situ gene editing. This review summarizes recent advancements in these areas and discusses future challenges toward the development of transformative medicines for motor neuron diseases.<\/jats:p>","DOI":"10.3390\/ph14060565","type":"journal-article","created":{"date-parts":[[2021,6,14]],"date-time":"2021-06-14T22:25:46Z","timestamp":1623709546000},"page":"565","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Stem Cell Models and Gene Targeting for Human Motor Neuron Diseases"],"prefix":"10.3390","volume":"14","author":[{"given":"Yashashree","family":"Karpe","sequence":"first","affiliation":[{"name":"Department of Biomedical Sciences, University of Illinois College of Medicine, Rockford, IL 61107, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenyu","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Biomedical Sciences, University of Illinois College of Medicine, Rockford, IL 61107, USA"},{"name":"Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1899-9134","authenticated-orcid":false,"given":"Xue-Jun","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Biomedical Sciences, University of Illinois College of Medicine, Rockford, IL 61107, USA"},{"name":"Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,6,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"837","DOI":"10.1095\/biolreprod.103.021147","article-title":"Feeder Layer- and Serum-Free Culture of Human Embryonic Stem Cells1","volume":"70","author":"Amit","year":"2004","journal-title":"Biol. 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