Abstract:
:Facioscapulohumeral dystrophy (FSHD) is a progressive muscular dystrophy caused by decreased epigenetic repression of the D4Z4 macrosatellite repeats and ectopic expression of DUX4, a retrogene encoding a germline transcription factor encoded in each repeat. Unaffected individuals generally have more than 10 repeats arrayed in the subtelomeric region of chromosome 4, whereas the most common form of FSHD (FSHD1) is caused by a contraction of the array to fewer than 10 repeats, associated with decreased epigenetic repression and variegated expression of DUX4 in skeletal muscle. We have generated transgenic mice carrying D4Z4 arrays from an FSHD1 allele and from a control allele. These mice recapitulate important epigenetic and DUX4 expression attributes seen in patients and controls, respectively, including high DUX4 expression levels in the germline, (incomplete) epigenetic repression in somatic tissue, and FSHD-specific variegated DUX4 expression in sporadic muscle nuclei associated with D4Z4 chromatin relaxation. In addition we show that DUX4 is able to activate similar functional gene groups in mouse muscle cells as it does in human muscle cells. These transgenic mice therefore represent a valuable animal model for FSHD and will be a useful resource to study the molecular mechanisms underlying FSHD and to test new therapeutic intervention strategies.
journal_name
PLoS Genetjournal_title
PLoS geneticsauthors
Krom YD,Thijssen PE,Young JM,den Hamer B,Balog J,Yao Z,Maves L,Snider L,Knopp P,Zammit PS,Rijkers T,van Engelen BG,Padberg GW,Frants RR,Tawil R,Tapscott SJ,van der Maarel SMdoi
10.1371/journal.pgen.1003415subject
Has Abstractpub_date
2013-04-01 00:00:00pages
e1003415issue
4eissn
1553-7390issn
1553-7404pii
PGENETICS-D-12-02202journal_volume
9pub_type
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