Abstract:
:In myotonic dystrophy type I (DM1), nuclear retention of mutant DMPK transcripts compromises muscle cell differentiation. Although several reports have identified molecular defects in myogenesis, it remains still unclear how exactly the retention of the mutant transcripts induces this defect. We have recently created a novel cellular model in which the mutant DMPK 3' UTR transcripts were released to the cytoplasm of myoblasts by using the WPRE genetic element. As a result, muscle cell differentiation was repaired. In this paper, this cellular model was further exploited to investigate the effect of the levels and location of the mutant transcripts on muscle differentiation. Results show that the levels of these transcripts were proportional to the inhibition of both the initial fusion of myoblasts and the maturity of myotubes. Moreover, the cytoplasmic export of the mutant RNAs to the cytoplasm caused less inhibition only in the initial fusion of myoblasts.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Mastroyiannopoulos NP,Chrysanthou E,Kyriakides TC,Uney JB,Mahadevan MS,Phylactou LAdoi
10.1016/j.bbrc.2008.10.031subject
Has Abstractpub_date
2008-12-12 00:00:00pages
526-531issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(08)01974-8journal_volume
377pub_type
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