Journal of Clinical InvestigationNeurosciencePeer-reviewed journal article
Nemo-like kinase disrupts nuclear import and drives TDP43 mislocalization in ALS
Michael E. BekieriD, Emile S. PinarbasiiD, Gopinath KrishnaniD, Jack J. Mesojedec, Madelaine Hurley, Harisankar Harikumar Sheela, Catherine A. CollinsiD, Layla GhaffariiD, Martina de MajoiD, Erik M. UllianiD, Mark KoontziD, Sarah Coleman, Xingli LiiD, Elizabeth M.H. TankiD, Jacob Waksmacki, Fen‐Biao GaoiD, Sami J. BarmadaiD
Abstract
Cytoplasmic TDP43 mislocalization and aggregation are pathological hallmarks of amyotrophic lateral sclerosis (ALS). However, the initial cellular insults that lead to TDP43 mislocalization remain unclear. In this study, we demonstrate that Nemo-like kinase (NLK)--a proline-directed serine/threonine kinase--promotes the mislocalization of TDP43 and other RNA-binding proteins by disrupting nuclear import. NLK levels are selectively elevated in neurons exhibiting TDP43 mislocalization in ALS patient tissues, while genetic reduction of NLK reduces toxicity in human neuron models of ALS. Our findings suggest that NLK is a promising therapeutic target for neurodegenerative diseases.
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