PUBLICATION
Abnormal splicing switch of DMD's penultimate exon compromises muscle fibre maintenance in myotonic dystrophy
- Authors
- Rau, F., Lainé, J., Ramanoudjame, L., Ferry, A., Arandel, L., Delalande, O., Jollet, A., Dingli, F., Lee, K.Y., Peccate, C., Lorain, S., Kabashi, E., Athanasopoulos, T., Koo, T., Loew, D., Swanson, M.S., Le Rumeur, E., Dickson, G., Allamand, V., Marie, J., Furling, D.
- ID
- ZDB-PUB-150529-2
- Date
- 2015
- Source
- Nature communications 6: 7205 (Journal)
- Registered Authors
- Keywords
- none
- MeSH Terms
-
- Homeostasis
- Immunoprecipitation
- Mice
- Exons
- RNA Splicing/genetics*
- Humans
- Muscle Proteins/genetics*
- Muscle Proteins/metabolism
- Real-Time Polymerase Chain Reaction
- RNA-Binding Proteins/genetics*
- Muscle Fibers, Skeletal/metabolism*
- Muscle Fibers, Skeletal/ultrastructure
- Tandem Mass Spectrometry
- Dystrophin/genetics*
- Dystrophin/metabolism
- Animals
- Gene Expression Regulation, Developmental*
- Membrane Proteins/genetics*
- Membrane Proteins/metabolism
- Myotonic Dystrophy/genetics*
- Myotonic Dystrophy/pathology
- Sarcoplasmic Reticulum/ultrastructure
- Zebrafish Proteins/genetics*
- Zebrafish Proteins/metabolism
- Immunohistochemistry
- Microscopy, Electron
- Chromatography, Liquid
- PubMed
- 26018658 Full text @ Nat. Commun.
Citation
Rau, F., Lainé, J., Ramanoudjame, L., Ferry, A., Arandel, L., Delalande, O., Jollet, A., Dingli, F., Lee, K.Y., Peccate, C., Lorain, S., Kabashi, E., Athanasopoulos, T., Koo, T., Loew, D., Swanson, M.S., Le Rumeur, E., Dickson, G., Allamand, V., Marie, J., Furling, D. (2015) Abnormal splicing switch of DMD's penultimate exon compromises muscle fibre maintenance in myotonic dystrophy. Nature communications. 6:7205.
Abstract
Myotonic Dystrophy type 1 (DM1) is a dominant neuromuscular disease caused by nuclear-retained RNAs containing expanded CUG repeats. These toxic RNAs alter the activities of RNA splicing factors resulting in alternative splicing misregulation and muscular dysfunction. Here we show that the abnormal splicing of DMD exon 78 found in dystrophic muscles of DM1 patients is due to the functional loss of MBNL1 and leads to the re-expression of an embryonic dystrophin in place of the adult isoform. Forced expression of embryonic dystrophin in zebrafish using an exon-skipping approach severely impairs the mobility and muscle architecture. Moreover, reproducing Dmd exon 78 missplicing switch in mice induces muscle fibre remodelling and ultrastructural abnormalities including ringed fibres, sarcoplasmic masses or Z-band disorganization, which are characteristic features of dystrophic DM1 skeletal muscles. Thus, we propose that splicing misregulation of DMD exon 78 compromises muscle fibre maintenance and contributes to the progressive dystrophic process in DM1.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping