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2014 ; 22
(11
): 1923-35
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Forelimb treatment in a large cohort of dystrophic dogs supports delivery of a
recombinant AAV for exon skipping in Duchenne patients
#MMPMID25200009
Le Guiner C
; Montus M
; Servais L
; Cherel Y
; Francois V
; Thibaud JL
; Wary C
; Matot B
; Larcher T
; Guigand L
; Dutilleul M
; Domenger C
; Allais M
; Beuvin M
; Moraux A
; Le Duff J
; Devaux M
; Jaulin N
; Guilbaud M
; Latournerie V
; Veron P
; Boutin S
; Leborgne C
; Desgue D
; Deschamps JY
; Moullec S
; Fromes Y
; Vulin A
; Smith RH
; Laroudie N
; Barnay-Toutain F
; Rivière C
; Bucher S
; Le TH
; Delaunay N
; Gasmi M
; Kotin RM
; Bonne G
; Adjali O
; Masurier C
; Hogrel JY
; Carlier P
; Moullier P
; Voit T
Mol Ther
2014[Nov]; 22
(11
): 1923-35
PMID25200009
show ga
Duchenne muscular dystrophy (DMD) is a severe muscle-wasting disorder caused by
mutations in the dystrophin gene, without curative treatment yet available. Our
study provides, for the first time, the overall safety profile and therapeutic
dose of a recombinant adeno-associated virus vector, serotype 8 (rAAV8) carrying
a modified U7snRNA sequence promoting exon skipping to restore a functional
in-frame dystrophin transcript, and injected by locoregional transvenous
perfusion of the forelimb. Eighteen Golden Retriever Muscular Dystrophy (GRMD)
dogs were exposed to increasing doses of GMP-manufactured vector. Treatment was
well tolerated in all, and no acute nor delayed adverse effect, including
systemic and immune toxicity was detected. There was a dose relationship for the
amount of exon skipping with up to 80% of myofibers expressing dystrophin at the
highest dose. Similarly, histological, nuclear magnetic resonance pathological
indices and strength improvement responded in a dose-dependent manner. The
systematic comparison of effects using different independent methods, allowed to
define a minimum threshold of dystrophin expressing fibers (>33% for structural
measures and >40% for strength) under which there was no clear-cut therapeutic
effect. Altogether, these results support the concept of a phase 1/2 trial of
locoregional delivery into upper limbs of nonambulatory DMD patients.