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Salami CO, Jackson K, Jose C, Alyass L, Cisse GI, De BP, Stiles KM, Chiuchiolo MJ, Sondhi D, Crystal RG, Kaminsky SM. Stress-Induced Mouse Model of the Cardiac Manifestations of Friedreich's Ataxia Corrected by AAV-mediated Gene Therapy. Hum Gene Ther 2020; 31:819-827. [PMID: 32646255 DOI: 10.1089/hum.2019.363] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Friedreich's ataxia (FA), an autosomal recessive disorder caused by a deficiency in the expression of frataxin (FXN), is characterized by progressive ataxia and hypertrophic cardiomyopathy. Although cardiac dysfunction is the most common cause of mortality in FA, the cardiac disease remains subclinical for most of the clinical course because the neurologic disease limits muscle oxygen demands. Previous FXN knockout mouse models exhibit fatal cardiomyopathy similar to human FA, but in contrast to the human condition, untreated mice become moribund by 2 months of age, unlike humans where the cardiac disease often does not manifest until the third decade. The study was designed to create a mouse model for early FA disease relevant to the time for which a gene therapy would likely be most effective. To generate a cardiac-specific mouse model of FA cardiomyopathy similar to the human disease, we used a cardiac promoter (αMyhc) driving CRE recombinase cardiac-specific excision of FXN exon 4 to generate a mild, cardiac-specific FA model that is normal at rest, but exhibits the cardiac phenotype with stress. The hearts of αMyhc mice had decreased levels of FXN and activity of the mitochondrial complex II/complex IV respiratory chain. At rest, αMyhc mice exhibited normal cardiac function as assessed by echocardiographic assessment of ejection fraction and fractional shortening, but when the heart was stressed chemically with dobutamine, αMyhc mice compared with littermate control mice had a 62% reduction in the stress ejection fraction (p < 2 × 10-4) and 71% reduction in stress-related fractional shortening (p < 10-5). When assessing functional cardiac performance using running on an inclined treadmill, αMyhc mice stayed above the midline threefold less than littermate controls (p < 0.02). A one-time intravenous administration of 1011 genome copies of AAVrh.10hFXN, an adeno-associated virus (AAV) serotype rh10 gene transfer vector expressing human FXN, corrected the stress-induced ejection fraction and fractional shortening phenotypes. Treated αMyhc mice exhibited exercise performance on a treadmill indistinguishable from littermate controls (p > 0.07). These αMyhc mice provide an ideal model to study long-term cardiac complications due to FA and AAV-mediated gene therapy correction of stress-induced cardiac phenotypes typical of human FA.
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Affiliation(s)
- Christiana O Salami
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Katie Jackson
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Clarisse Jose
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Laith Alyass
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Georges-Ibrahim Cisse
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Bishnu P De
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Katie M Stiles
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Maria J Chiuchiolo
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Dolan Sondhi
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Ronald G Crystal
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
| | - Stephen M Kaminsky
- Department of Genetic Medicine, Weill Cornell Medical College, New York, New York, USA
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Mallya A, Jose C, Baig M, Williams R, Cho D, Mehta D, Volavka J. Antiparkinsonics, neuroleptics, and tardive dyskinesia. Biol Psychiatry 1979; 14:645-9. [PMID: 39640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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