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Despite all efforts to date, we still do not fully understand the molecular events that contribute to the lack of sensory neurons in FRDA. We studied the adult neuronal growth cone (GC) at the cellular and molecular level to decipher the connection between frataxin and actin cytoskeleton in DRG neurons of the well-characterised YG8R Friedreich\u2019s ataxia mouse model. Immunofluorescence studies in primary cultures of DRG from YG8R mice showed neurons with fewer and smaller GCs than controls, associated with an inhibition of neurite growth. In frataxin-deficient neurons, we also observed an increase in the filamentous (F)-actin\/monomeric (G)-actin ratio (F\/G-actin ratio) in axons and GCs linked to dysregulation of two crucial modulators of filamentous actin turnover, cofilin-1 and the actin-related protein (ARP) 2\/3 complex. We show how the activation of cofilin is due to the increase in chronophin (CIN), a cofilin-activating phosphatase. Thus cofilin emerges, for the first time, as a link between frataxin deficiency and actin cytoskeleton alterations.<\/jats:p>","DOI":"10.1038\/s41598-020-62050-7","type":"journal-article","created":{"date-parts":[[2020,3,23]],"date-time":"2020-03-23T11:03:40Z","timestamp":1584961420000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Cofilin dysregulation alters actin turnover in frataxin-deficient neurons"],"prefix":"10.1038","volume":"10","author":[{"given":"Diana C.","family":"Mu\u00f1oz-Lasso","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bel\u00e9n","family":"Moll\u00e1","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pablo","family":"Calap-Quintana","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7547-7872","authenticated-orcid":false,"given":"Jos\u00e9 Luis","family":"Garc\u00eda-Gim\u00e9nez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Federico\u00a0V.","family":"Pallardo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francesc","family":"Palau","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pilar","family":"Gonzalez-Cabo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,3,23]]},"reference":[{"key":"62050_CR1","doi-asserted-by":"publisher","first-page":"78","DOI":"10.1097\/NEN.0b013e31827e5762","volume":"72","author":"AH Koeppen","year":"2013","unstructured":"Koeppen, A. 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