{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T21:53:36Z","timestamp":1790805216317,"version":"4.1.0"},"reference-count":73,"publisher":"Oxford University Press (OUP)","issue":"17","license":[{"start":{"date-parts":[[2020,8,3]],"date-time":"2020-08-03T00:00:00Z","timestamp":1596412800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"name":"Association Fran\u00e7aise de l\u2019Ataxie de Friedreich, AFAF"},{"name":"French Friedreich\u2019s Ataxia Patient Organization"},{"name":"French Fondation Maladies Rares"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2020,10,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Friedreich ataxia (FA) is caused by GAA repeat expansions in the first intron of FXN, the gene encoding frataxin, which results in decreased gene expression. Thanks to the high degree of frataxin conservation, the Drosophila melanogaster fruitfly appears as an adequate animal model to study this disease and to evaluate therapeutic interventions. Here, we generated a Drosophila model of FA with CRISPR\/Cas9 insertion of approximately 200 GAA in the intron of the fly frataxin gene fh. These flies exhibit a developmental delay and lethality associated with decreased frataxin expression. We were able to bypass preadult lethality using genetic tools to overexpress frataxin only during the developmental period. These frataxin-deficient adults are short-lived and present strong locomotor defects. RNA-Seq analysis identified deregulation of genes involved in amino-acid metabolism and transcriptomic signatures of oxidative stress. In particular, we observed a progressive increase of Tspo expression, fully rescued by adult frataxin expression. Thus, Tspo expression constitutes a molecular marker of the disease progression in our fly model and might be of interest in other animal models or in patients. Finally, in a candidate drug screening, we observed that N-acetyl cysteine improved the survival, locomotor function, resistance to oxidative stress and aconitase activity of frataxin-deficient flies. Therefore, our model provides the opportunity to elucidate in vivo, the protective mechanisms of this molecule of therapeutic potential. This study also highlights the strength of the CRISPR\/Cas9 technology to introduce human mutations in endogenous orthologous genes, leading to Drosophila models of human diseases with improved physiological relevance.<\/jats:p>","DOI":"10.1093\/hmg\/ddaa170","type":"journal-article","created":{"date-parts":[[2020,8,3]],"date-time":"2020-08-03T10:22:15Z","timestamp":1596450135000},"page":"2831-2844","source":"Crossref","is-referenced-by-count":17,"title":["A Drosophila model of Friedreich ataxia with CRISPR\/Cas9 insertion of GAA repeats in the frataxin gene reveals in vivo protection by N-acetyl cysteine"],"prefix":"10.1093","volume":"29","author":[{"given":"Maria","family":"Russi","sequence":"first","affiliation":[{"name":"Universit\u00e9 de Paris, BFA Unit of Functional and Adaptative Biology, UMR 8251, CNRS, Paris F-75013, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elodie","family":"Martin","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Paris, BFA Unit of Functional and Adaptative Biology, UMR 8251, CNRS, Paris F-75013, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Benoit","family":"D\u2019Autr\u00e9aux","sequence":"additional","affiliation":[{"name":"Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Universit\u00e9 Paris-Saclay, Gif-sur-Yvette cedex 91198, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laura","family":"Tixier","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Paris, BFA Unit of Functional and Adaptative Biology, UMR 8251, CNRS, Paris F-75013, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Herv\u00e9","family":"Tricoire","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Paris, BFA Unit of Functional and Adaptative Biology, UMR 8251, CNRS, Paris F-75013, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"V\u00e9ronique","family":"Monnier","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Paris, BFA Unit of Functional and Adaptative Biology, UMR 8251, CNRS, Paris F-75013, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2020,8,3]]},"reference":[{"key":"2020101402144067100_ref1","doi-asserted-by":"crossref","first-page":"651","DOI":"10.1089\/ars.2009.3015","article-title":"Friedreich ataxia: molecular mechanisms, redox considerations, and therapeutic opportunities","volume":"13","author":"Santos","year":"2010","journal-title":"Antioxid. 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