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Different pathological mechanisms have been proposed. Here, we define the impact of VCP mutants on lysosomes and how cellular homeostasis is restored by inducing autophagy in the presence of lysosomal damage.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>By electron microscopy, we studied lysosomal morphology in VCP animal and motoneuronal models. With the use of western blotting, real\u2010time quantitative polymerase chain reaction (RT\u2010qPCR), immunofluorescence and filter trap assay, we evaluated the effect of selected VCP mutants in neuronal cells on lysosome size and activity, lysosomal membrane permeabilization and their impact on autophagy.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      We found that VCP mutants induce the formation of aberrant multilamellar organelles in VCP animal and cell models similar to those found in patients with\n                      <jats:italic>VCP<\/jats:italic>\n                      mutations or with lysosomal storage disorders. In neuronal cells, we found altered lysosomal activity characterised by membrane permeabilization with galectin\u20103 redistribution and activation of PPP3CB. This selectively activated the autophagy\/lysosomal transcriptional regulator TFE3, but not TFEB, and enhanced both SQSTM1\/p62 and lipidated MAP1LC3B levels inducing autophagy. Moreover, we found that wild type VCP, but not the mutants, counteracted lysosomal damage induced either by trehalose or by a mutant form of SOD1 (G93A), also blocking the formation of its insoluble intracellular aggregates. Thus, chronic activation of autophagy might fuel the formation of multilamellar bodies.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Together, our findings provide insights into the pathogenesis of VCP\u2010related diseases, by proposing a novel mechanism of multilamellar body formation induced by VCP mutants that involves lysosomal damage and induction of lysophagy.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/nan.12818","type":"journal-article","created":{"date-parts":[[2022,5,2]],"date-time":"2022-05-02T21:13:45Z","timestamp":1651526025000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Pathogenic variants of Valosin\u2010containing protein induce lysosomal damage and transcriptional activation of autophagy regulators in neuronal 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