Article (Scientific journals)
miR-379 links glucocorticoid treatment with mitochondrial response in Duchenne muscular dystrophy.
Sanson, M.; Vu Hong, A.; Massourides, E. et al.
2020In Scientific Reports, 10 (1), p. 9139
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Keywords :
Mitochondrial Proton-Translocating ATPases/antagonists & inhibitors/genetics/metabolism; Muscle, Skeletal/metabolism; Muscular Dystrophy, Duchenne/drug therapy/genetics; Myoblasts, Skeletal/metabolism; RNA Interference; RNA, Small Interfering/metabolism
Abstract :
[en] Duchenne Muscular Dystrophy (DMD) is a lethal muscle disorder, caused by mutations in the DMD gene and affects approximately 1:5000-6000 male births. In this report, we identified dysregulation of members of the Dlk1-Dio3 miRNA cluster in muscle biopsies of the GRMD dog model. Of these, we selected miR-379 for a detailed investigation because its expression is high in the muscle, and is known to be responsive to glucocorticoid, a class of anti-inflammatory drugs commonly used in DMD patients. Bioinformatics analysis predicts that miR-379 targets EIF4G2, a translational factor, which is involved in the control of mitochondrial metabolic maturation. We confirmed in myoblasts that EIF4G2 is a direct target of miR-379, and identified the DAPIT mitochondrial protein as a translational target of EIF4G2. Knocking down DAPIT in skeletal myotubes resulted in reduced ATP synthesis and myogenic differentiation. We also demonstrated that this pathway is GC-responsive since treating mice with dexamethasone resulted in reduced muscle expression of miR-379 and increased expression of EIF4G2 and DAPIT. Furthermore, miR-379 seric level, which is also elevated in the plasma of DMD patients in comparison with age-matched controls, is reduced by GC treatment. Thus, this newly identified pathway may link GC treatment to a mitochondrial response in DMD.
Disciplines :
Pediatrics
Neurology
Author, co-author :
Sanson, M.
Vu Hong, A.
Massourides, E.
Bourg, N.
Suel, L.
Amor, F.
Corre, G.
Bénit, P.
Barthélémy, I.
Blot, S.
Bigot, A.
Pinset, C.
Rustin, P.
Servais, Laurent ;  Université de Liège - ULiège > Département des sciences cliniques > Département des sciences cliniques
Voit, T.
Richard, I.
Israeli, D.
More authors (7 more) Less
Language :
English
Title :
miR-379 links glucocorticoid treatment with mitochondrial response in Duchenne muscular dystrophy.
Publication date :
04 June 2020
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Nature Publishing Group, London, United Kingdom
Volume :
10
Issue :
1
Pages :
9139
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
doi: 10.1038/s41598-020-66016-7
Available on ORBi :
since 01 February 2021

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