PROJECT 4 FSH-Patient Derived IPS Cells to Study the Developmental Regulation of DUX4 Transcription The D4Z4 repeat array with multiple copies of the intronless DUX4 gene likely developed as a consequence of retrotransposition of an ancestral gene expressed in ES cells. Our recent publication and preliminary data shows that transcripts from D4Z4 are readily detectable in ES cells making them an important cell type for the study of DUX4 transcriptional regulation. Our preliminary data are consistent with the idea that DUX4 is expressed constitutively in ES cells and its regulation is largely achieved by transcriptional silencing as cells differentiate into other tissue types. Our hypothesis is that FSHD is caused by sequence variations in D4Z4 that disrupt this silencing process with unique toxicity to muscle cells. Our long term goal is to define the normal and pathogenic transcription patterns during development, and identify sequences responsible for the altered pattern of gene expression in FSHD.
In Aim 1 we describe experiments to develop and characterize IPS cells from controls and FSHD-affected patients, and determine if epigenetic markers of D4Z4 regulation seen in ES cells are recapitulated in IPS cells.
In Aim 2, experiments are described to identify transcriptional enhancer and silencing regions that are presumably the targets of developmental regulation of the D4Z4 locus, and therefore will be important targets for therapeutic intervention. We will determine how transcriptional regulation is altered when these areas are removed or mutated using human and mouse developmental models.
In Aim 3 we will modify cells from FSHD-affected patients to produce isogenic clones with homozygous D4Z4 genotypes and quantify transcription differences that result as a consequence of these modifications. In so doing we will produce myoblasts from FSHD patients that contain only non-pathogenic an-ays and with advances in IPS cell development, could be used for autologous transplantation.

Public Health Relevance

The significance of these studies is that an understanding of normal and pathogenic developmental patterns of DUX4 transcriptional regulation will provide a model for disease pathophysiology and help identify therapeutic targets for treatment.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Program Projects (P01)
Project #
5P01NS069539-05
Application #
8634148
Study Section
National Institute of Neurological Disorders and Stroke Initial Review Group (NSD)
Project Start
Project End
Budget Start
2014-04-01
Budget End
2015-03-31
Support Year
5
Fiscal Year
2014
Total Cost
Indirect Cost
Name
Fred Hutchinson Cancer Research Center
Department
Type
DUNS #
City
Seattle
State
WA
Country
United States
Zip Code
98109
Hendrickson, Peter G; Doráis, Jessie A; Grow, Edward J et al. (2017) Conserved roles of mouse DUX and human DUX4 in activating cleavage-stage genes and MERVL/HERVL retrotransposons. Nat Genet 49:925-934
Campbell, Amy E; Oliva, Jonathan; Yates, Matthew P et al. (2017) BET bromodomain inhibitors and agonists of the beta-2 adrenergic receptor identified in screens for compounds that inhibit DUX4 expression in FSHD muscle cells. Skelet Muscle 7:16
Jagannathan, Sujatha; Bradley, Robert K (2017) Congenital myotonic dystrophy-an RNA-mediated disease across a developmental continuum. Genes Dev 31:1067-1068
Feng, Qing; Jagannathan, Sujatha; Bradley, Robert K (2017) The RNA Surveillance Factor UPF1 Represses Myogenesis via Its E3 Ubiquitin Ligase Activity. Mol Cell 67:239-251.e6
Lemmers, Richard Jlf; van der Vliet, Patrick J; Balog, Judit et al. (2017) Deep characterization of a common D4Z4 variant identifies biallelic DUX4 expression as a modifier for disease penetrance in FSHD2. Eur J Hum Genet :
Shadle, Sean C; Zhong, Jun Wen; Campbell, Amy E et al. (2017) DUX4-induced dsRNA and MYC mRNA stabilization activate apoptotic pathways in human cell models of facioscapulohumeral dystrophy. PLoS Genet 13:e1006658
Mason, Amanda G; Slieker, Roderick C; Balog, Judit et al. (2017) SMCHD1 regulates a limited set of gene clusters on autosomal chromosomes. Skelet Muscle 7:12
van den Boogaard, Marlinde L; Lemmers, Richard J F L; Camaño, Pilar et al. (2016) Double SMCHD1 variants in FSHD2: the synergistic effect of two SMCHD1 variants on D4Z4 hypomethylation and disease penetrance in FSHD2. Eur J Hum Genet 24:78-85
Mul, Karlien; van den Boogaard, Marlinde L; van der Maarel, Silvère M et al. (2016) Integrating clinical and genetic observations in facioscapulohumeral muscular dystrophy. Curr Opin Neurol 29:606-13
Knopp, Paul; Krom, Yvonne D; Banerji, Christopher R S et al. (2016) DUX4 induces a transcriptome more characteristic of a less-differentiated cell state and inhibits myogenesis. J Cell Sci 129:3816-3831

Showing the most recent 10 out of 45 publications