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Characterization of dystrophin deficient rats: a new model for Duchenne muscular dystrophy.

Authors: Larcher, Thibaut  Lafoux, Aude  Tesson, Laurent  Remy, Séverine  Thepenier, Virginie  François, Virginie  Le Guiner, Caroline  Goubin, Helicia  Dutilleul, Maéva  Guigand, Lydie  Toumaniantz, Gilles  De Cian, Anne  Boix, Charlotte  Renaud, Jean-Baptiste  Cherel, Yan  Giovannangeli, Carine  Concordet, Jean-Paul  Anegon, Ignacio  Huchet, Corinne 
Citation: Larcher T, etal., PLoS One. 2014 Oct 13;9(10):e110371. doi: 10.1371/journal.pone.0110371. eCollection 2014.
Pubmed: (View Article at PubMed) PMID:25310701
DOI: Full-text: DOI:10.1371/journal.pone.0110371

A few animal models of Duchenne muscular dystrophy (DMD) are available, large ones such as pigs or dogs being expensive and difficult to handle. Mdx (X-linked muscular dystrophy) mice only partially mimic the human disease, with limited chronic muscular lesions and muscle weakness. Their small size also imposes limitations on analyses. A rat model could represent a useful alternative since rats are small animals but 10 times bigger than mice and could better reflect the lesions and functional abnormalities observed in DMD patients. Two lines of Dmd mutated-rats (Dmdmdx) were generated using TALENs targeting exon 23. Muscles of animals of both lines showed undetectable levels of dystrophin by western blot and less than 5% of dystrophin positive fibers by immunohistochemistry. At 3 months, limb and diaphragm muscles from Dmdmdx rats displayed severe necrosis and regeneration. At 7 months, these muscles also showed severe fibrosis and some adipose tissue infiltration. Dmdmdx rats showed significant reduction in muscle strength and a decrease in spontaneous motor activity. Furthermore, heart morphology was indicative of dilated cardiomyopathy associated histologically with necrotic and fibrotic changes. Echocardiography showed significant concentric remodeling and alteration of diastolic function. In conclusion, Dmdmdx rats represent a new faithful small animal model of DMD.

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CRRD Object Information
CRRD ID: 12880034
Created: 2017-05-02
Species: All species
Last Modified: 2017-05-02
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.