Article (Scientific journals)
The Kruppel-like Factor 15 as a Molecular Link between Myogenic Factors and a Chromosome 4q Transcriptional Enhancer Implicated in Facioscapulohumeral Dystrophy
Dmitriev, P; Petrov, A; Ansseau, Eugénie et al.
2011In Journal of Biological Chemistry, 286, p. 44620-44631
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Abstract :
[en] Facioscapulohumeral muscular dystrophy (FSHD), a dominant hereditary disease with a prevalence of 7 per 100,000 individuals, is associated with a partial deletion in the subtelomeric D4Z4 repeat array on chromosome 4q. The D4Z4 repeat contains a strong transcriptional enhancer that activates promoters of several FSHD-related genes. We report here that the enhancer within the D4Z4 repeat binds the Krüppel-like factor KLF15. KLF15 was found to be up-regulated during myogenic differentiation induced by serum starvation or by overexpression of the myogenic differentiation factor MYOD. When overexpressed, KLF15 activated the D4Z4 enhancer and led to overexpression of DUX4c (Double homeobox 4, centromeric) and FRG2 (FSHD region gene 2) genes, whereas its silencing caused inactivation of the D4Z4 enhancer. In immortalized human myoblasts, the D4Z4 enhancer was activated by the myogenic factor MYOD, an effect that was abolished upon KLF15 silencing or when the KLF15-binding sites within the D4Z4 enhancer were mutated, indicating that the myogenesis-related activation of the D4Z4 enhancer was mediated by KLF15. KLF15 and several myogenesis-related factors were found to be expressed at higher levels in myoblasts, myotubes, and muscle biopsies from FSHD patients than in healthy controls. We propose that KLF15 serves as a molecular link between myogenic factors and the activity of the D4Z4 enhancer, and it thus contributes to the overexpression of the DUX4c and FRG2 genes during normal myogenic differentiation and in FSHD.
Disciplines :
General & internal medicine
Biotechnology
Author, co-author :
Dmitriev, P
Petrov, A
Ansseau, Eugénie 
Stankevicins, L
Charron, Sébastien ;  Université de Mons > Faculté de Médecine et de Pharmacie > Biochimie métabolique et moléculaire
Kim, E
Bos, TJ
Robert, T
Turki, A
Coppée, Frédérique  ;  Université de Mons > Faculté de Médecine et de Pharmacie > Biochimie métabolique et moléculaire
Belayew, Alexandra ;  Université de Mons > Faculté de Médecine et de Pharmacie > Biochimie métabolique et moléculaire
Lazar, V
Carnac, G
Laoudj-Chenivesse, Dalila
Lipinski, M
Vassetzky, YS
More authors (6 more) Less
Language :
English
Title :
The Kruppel-like Factor 15 as a Molecular Link between Myogenic Factors and a Chromosome 4q Transcriptional Enhancer Implicated in Facioscapulohumeral Dystrophy
Publication date :
21 September 2011
Journal title :
Journal of Biological Chemistry
ISSN :
0021-9258
Publisher :
American Society for Biochemistry and Molecular Biology, Moldova
Volume :
286
Pages :
44620-44631
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
M122 - Biochimie métabolique et moléculaire
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