ArticleGene therapy2023
Removal of the GAA repeat in the heart of a Friedreich's ataxia mouse model using CjCas9.
Article in Gene therapy, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 4 citations in OpenAlex.
- Advances in Gene and Cellular Therapy in Friedreich Ataxia.Molecular diagnosis & therapy · 2026Review
- Myeloid cell replacement induces intercellular mitochondrial transfer and restores metabolism in a mouse model of mitochondrial disease.Nature communications · 2026Article
- CRISPR-Cas9-based therapies for Huntington's disease and Friedreich's ataxia: mechanisms, advances, and future perspectives.Neurogenetics · 2026Review
- CRISPR/Cas9-mediated deletion of a GA-repeat in human GPM6B leads to disruption of neural cell differentiation from NT2 cells.Scientific reports · 2024Article
- Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
Most Friedreich ataxia (FRDA) cases are caused by the elongation of the GAA repeat (GAAr) sequence in the first intron of the FXN gene, leading to a decrease of the frataxin protein expression. Deletion of this GAAr with CRISPR/Cas9 technology leads to an increase in frataxin expression in vitro. We are therefore aiming to develop FRDA treatment based on the deletion of GAAr with CRISPR/Cas9 technology using a single AAV expressing a small Cas9 (CjCas9) and two single guide RNAs (sgRNAs) targeting the FXN gene. This AAV was intraperitoneally administrated to YG8sR (250-300 GAAr) and to YG8-800 (800 GAAr) mice. DNA and RNA were extracted from different organs a month later. PCR amplification of part of intron 1 of the FXN gene detected some GAAr deletion in some cells in heart and liver of both mouse models, but the editing rate was not sufficient to cause an increase in frataxin mRNA in the heart. However, the correlation observed between the editing rate and the distribution of AAV suggests a possible therapy based on the removal of the GAAr with a better delivery tool of the CRISPR/Cas9 system.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.