Valine restriction extends survival in a Drosophila model of short-chain enoyl-CoA hydratase 1 (ECHS1) deficiency
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Summary Short-chain enoyl-CoA hydratase 1 deficiency (ECHS1D) is a rare genetic disorder caused by biallelic pathogenic variants in the ECHS1 gene. ECHS1D is characterised by severe neurological and physical impairment that often leads to childhood mortality. Therapies such as protein and single nutrient-restricted diets show poor efficacy, whereas development of new treatments is hindered by the low prevalence of the disorder and a lack of model systems for treatment testing. Here we report on the establishment of a Drosophila model of ECHS1D. Flies carrying mutations in Echs1 (CG6543) were characterised for their physical and metabolic phenotypes, and dietary intervention to improve fly model health was explored. The Echs1 null larvae recapitulated human ECHS1D phenotypes including elevated biomarkers (S-(2-carboxypropyl)cysteamine and 2,3-dihydroxy-2-methylbutyric acid), poor motor behaviour and early mortality, and could be rescued by expression of a human ECHS1 transgene. We observed that both restriction of valine in isolation, or all branched-chain amino acids (BCAAs - leucine, isoleucine, and valine) together, extended larval survival, supporting the idea that reducing BCAA pathway catabolic flux is beneficial in this disorder. Further, metabolic profiling revealed substantial changes to carbohydrate metabolism, suggesting that Echs1 loss causes widespread metabolic dysregulation beyond valine metabolism. The similarities between Drosophila and human ECHS1D suggest that the fly model is a valuable animal system in which to explore mechanisms of pathogenesis and novel treatment options for this disorder.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Valine restriction extends survival in a <i>Drosophila</i> model of short-chain enoyl-CoA hydratase 1 (ECHS1) deficiency
- Date Crossref
- 17/08/2024
- Éditeur
- openRxiv
- Type
- posted-content
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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La Trobe University Department of Biochemistry and Chemistry and La Trobe Institute for Molecular Science pays non établi dans la noticeUniversité ou école supérieure
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Monash University Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology pays non établi dans la noticeUniversité ou école supérieure
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The University of Melbourne Department of Paediatrics pays non établi dans la noticeUniversité ou école supérieure
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Murdoch Children's Research Institute pays non établi dans la noticeOrganisation à but non lucratif
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School of Biological Sciences pays non établi dans la noticeUniversité ou école supérieure
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Current address: School of BioSciences pays non établi dans la noticeUniversité ou école supérieure
Department of Biochemistry and Chemistry and La Trobe Institute for Molecular Science — La Trobe University, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology — Monash University et Department of Paediatrics — The University of Melbourne, avec 3 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.