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Paul Knopp, Yvonne D Krom, Christopher R S Banerji, Maryna Panamarova, Louise A Moyle, Bianca den Hamer, Silvère M van der Maarel, Peter S Zammit
Skeletal muscle wasting in facioscapulohumeral muscular dystrophy (FSHD) results in substantial morbidity. On a disease-permissive chromosome 4qA haplotype, genomic and/or epigenetic changes at the D4Z4 macrosatellite repeat allows transcription of the DUX4 retrogene. Analysing transgenic mice carrying a human D4Z4 genomic locus from an FSHD-affected individual showed that DUX4 was transiently induced in myoblasts during skeletal muscle regeneration. Centromeric to the D4Z4 repeats is an inverted D4Z4 unit encoding DUX4c...
October 15, 2016: Journal of Cell Science
Vishakha Sharma, Sachchida Nand Pandey, Hunain Khawaja, Kristy J Brown, Yetrib Hathout, Yi-Wen Chen
OBJECTIVE: The goal of the study is to identity proteins, which interact with the promoter region of double homeobox protein 4 (DUX4) gene known to be causative for the autosomal dominant disorder Facioscapulohumeral Muscular Dystrophy (FSHD). METHODS: We performed a DNA pull down assay coupled with mass spectrometry analysis to identify proteins that interact with a DUX4 promoter probe in Rhabdomyosarcomca (RD) cells. We selected the top ranked protein poly (ADP-ribose) polymerase 1 (PARP1) from our mass spectrometry data for further ChIP-qPCR validation using patients' myoblasts...
August 2016: Journal of Genetic Syndrome & Gene Therapy
Bo Bao, Rika Maruyama, Toshifumi Yokota
Facioscapulohumeral muscular dystrophy (FSHD) is an inherited autosomal dominant disorder characterized clinically by progressive muscle degeneration. Currently, no curative treatment for this disorder exists. FSHD patients are managed through physiotherapy to improve function and quality of life. Over the last two decades, FSHD has been better understood as a disease genetically characterized by a pathogenic contraction of a subset of macrosatellite repeats on chromosome 4. Specifically, several studies support an FSHD pathogenesis model involving the aberrant expression of the double homeobox protein 4 (DUX4) gene...
August 2016: Intractable & Rare Diseases Research
Lorena Lazo de la Vega, Daniel H Hovelson, Andi K Cani, Chia-Jen Liu, Jonathan B McHugh, David R Lucas, Dafydd G Thomas, Rajiv M Patel, Scott A Tomlins
Gene fusions between CIC and DUX4 define a rare class of soft tissue sarcomas poorly understood at the molecular level. Previous karyotyping and fluorescence in situ hybridization studies support trisomy chromosome 8 as a recurrent alteration, however other driving alterations are largely unknown. Thus, we analyzed eleven formalin fixed paraffin embedded CIC-DUX4 sarcoma tissue samples (including three sample pairs) using targeted Ion Torrent based multiplexed polymerase chain reaction (PCR) next generation sequencing to characterize potential somatic driver alterations in 409 genes...
September 21, 2016: Human Pathology
Marie-Cécile Gaillard, Francesca Puppo, Stéphane Roche, Camille Dion, Emmanuelle Salort Campana, Virginie Mariot, Charlene Chaix, Catherine Vovan, Killian Mazaleyrat, Armand Tasmadjian, Rafaelle Bernard, Julie Dumonceaux, Shahram Attarian, Nicolas Lévy, Karine Nguyen, Frédérique Magdinier, Marc Bartoli
BACKGROUND: The main form of Facio-Scapulo-Humeral muscular Dystrophy is linked to copy number reduction of the 4q D4Z4 macrosatellite (FSHD1). In 5 % of cases, FSHD phenotype appears in the absence of D4Z4 reduction (FSHD2). In 70-80 % of these patients, variants of the SMCHD1 gene segregate with 4qA haplotypes and D4Z4 hypomethylation. CASE PRESENTATION: We report a family presenting with neuromuscular symptoms reminiscent of FSHD but without D4Z4 copy reduction...
2016: BMC Medical Genetics
Jocelyn O Eidahl, Carlee R Giesige, Jacqueline S Domire, Lindsay M Wallace, Allison M Fowler, Susan M Guckes, Sara E Garwick-Coppens, Paul Labhart, Scott Q Harper
D4Z4 repeats are present in at least 11 different mammalian species, including humans and mice. Each repeat contains an open reading frame encoding a double homeodomain (DUX) family transcription factor. Aberrant expression of the D4Z4 ORF called DUX4 is associated with the pathogenesis of Facioscapulohumeral muscular dystrophy (FSHD). DUX4 is toxic to numerous cell types of different species, and over-expression caused dysmorphism and developmental arrest in frogs and zebrafish, embryonic lethality in transgenic mice, and lesions in mouse muscle...
September 11, 2016: Human Molecular Genetics
Sophie Le Guellec, Valérie Velasco, Gaëlle Pérot, Sarah Watson, Franck Tirode, Jean-Michel Coindre
Subsets of primitive round-cell sarcomas remain difficult to diagnose and classify. Among these is a rare round-cell sarcoma that harbors a CIC gene rearrangement known as CIC-rearranged undifferentiated round-cell sarcoma, which is most commonly fused to the DUX4 gene. Owing to its aggressive clinical behavior and potential therapeutic implications, accurate identification of this novel soft tissue sarcoma is necessary. Definitive diagnosis requires molecular confirmation, but only a few centers are as yet able to perform this test...
August 26, 2016: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
Petr Dmitriev, Ekaterina Kiseleva, Olga Kharchenko, Evgeny Ivashkin, Andrei Pichugin, Philippe Dessen, Thomas Robert, Frédérique Coppée, Alexandra Belayew, Gilles Carnac, Dalila Laoudj-Chenivesse, Marc Lipinski, Andrei Vasiliev, Yegor S Vassetzky
We performed transcriptome profiling of human immortalized myoblasts (MB) transiently expressing double homeobox transcription factor 4 (DUX4) and double homeobox transcription factor 4 centromeric (DUX4c) and identified 114 and 70 genes differentially expressed in DUX4- and DUX4c-transfected myoblasts, respectively. A significant number of differentially expressed genes were involved in inflammation, cellular migration and chemotaxis suggesting a role for DUX4 and DUX4c in these processes. DUX4 but not DUX4c overexpression resulted in upregulation of the CXCR4 (C-X-C motif Receptor 4) and CXCL12 (C-X-C motif ligand 12 also known as SDF1) expression in human immortalized myoblasts...
August 18, 2016: Oncotarget
Sujatha Jagannathan, Sean Shadle, Rebecca Resnick, Lauren Snider, Rabi N Tawil, Silvère M van der Maarel, Robert K Bradley, Stephen J Tapscott
Facioscapulohumeral dystrophy (FSHD) is caused by the mis-expression of the double-homeodomain transcription factor DUX4 in skeletal muscle cells. Many different cell culture models have been developed to study the pathophysiology of FSHD, frequently based on endogenous expression of DUX4 in FSHD cells or by mis-expression of DUX4 in control human muscle cells. Although results generated using each model are generally consistent, differences have also been reported, making it unclear which model(s) faithfully recapitulate DUX4 and FSHD biology...
August 15, 2016: Human Molecular Genetics
Petr Dmitriev, Yara Bou Saada, Carla Dib, Eugénie Ansseau, Ana Barat, Aline Hamade, Philippe Dessen, Thomas Robert, Vladimir Lazar, Ruy A N Louzada, Corinne Dupuy, Vlada Zakharova, Gilles Carnac, Marc Lipinski, Yegor S Vassetzky
Facioscapulohumeral dystrophy (FSHD) is one of the three most common muscular dystrophies in the Western world, however, its etiology remains only partially understood. Here, we provide evidence of constitutive DNA damage in in vitro cultured myoblasts isolated from FSHD patients and demonstrate oxidative DNA damage implication in the differentiation of these cells into phenotypically-aberrant myotubes. Double homeobox 4 (DUX4), the major actor in FSHD pathology induced DNA damage accumulation when overexpressed in normal human myoblasts, and RNAi-mediated DUX4 inhibition reduced the level of DNA damage in FSHD myoblasts...
August 9, 2016: Free Radical Biology & Medicine
Sunny Das, Brian P Chadwick
We looked at a disease-associated macrosatellite array D4Z4 and focused on epigenetic factors influencing its chromatin state outside of the disease-context. We used the HCT116 cell line that contains the non-canonical polyadenylation (poly-A) signal required to stabilize somatic transcripts of the human double homeobox gene DUX4, encoded from D4Z4. In HCT116, D4Z4 is packaged into constitutive heterochromatin, characterized by DNA methylation and histone H3 tri-methylation at lysine 9 (H3K9me3), resulting in low basal levels of D4Z4-derived transcripts...
2016: PloS One
Yuan-Fang Liu, Bai-Yan Wang, Wei-Na Zhang, Jin-Yan Huang, Ben-Shang Li, Ming Zhang, Lu Jiang, Jian-Feng Li, Ming-Jie Wang, Yu-Jun Dai, Zi-Guan Zhang, Qiang Wang, Jie Kong, Bing Chen, Yong-Mei Zhu, Xiang-Qin Weng, Zhi-Xiang Shen, Jun-Min Li, Jin Wang, Xiao-Jing Yan, Yan Li, Ying-Min Liang, Li Liu, Xie-Qun Chen, Wang-Gang Zhang, Jin-Song Yan, Jian-Da Hu, Shu-Hong Shen, Jing Chen, Long-Jun Gu, Deqing Pei, Yongjin Li, Gang Wu, Xin Zhou, Rui-Bao Ren, Cheng Cheng, Jun J Yang, Kan-Kan Wang, Sheng-Yue Wang, Jinghui Zhang, Jian-Qing Mi, Ching-Hon Pui, Jing-Yan Tang, Zhu Chen, Sai-Juan Chen
Genomic landscapes of 92 adult and 111 pediatric patients with B-cell acute lymphoblastic leukemia (B-ALL) were investigated using next-generation sequencing and copy number alteration analysis. Recurrent gene mutations and fusions were tested in an additional 87 adult and 93 pediatric patients. Among the 29 newly identified in-frame gene fusions, those involving MEF2D and ZNF384 were clinically relevant and were demonstrated to perturb B-cell differentiation, with EP300-ZNF384 inducing leukemia in mice. Eight gene expression subgroups associated with characteristic genetic abnormalities were identified, including leukemia with MEF2D and ZNF384 fusions in two distinct clusters...
June 2016: EBioMedicine
Karlien Mul, Marlinde L van den Boogaard, Silvère M van der Maarel, Baziel G M van Engelen
PURPOSE OF REVIEW: This review gives an overview of the currently known key clinical and (epi)genetic aspects of facioscapulohumeral muscular dystrophy (FSHD) and provides perspectives to facilitate future research. RECENT FINDINGS: Clinically, imaging studies have contributed to a detailed characterization of the FSHD phenotype, and a model is proposed with five stages of disease progression. A number of clinical trials have been conducted regarding exercise and diet aiming to reduce symptoms...
October 2016: Current Opinion in Neurology
Jennifer Cj Chen, Oliver D King, Yuanfan Zhang, Nicholas P Clayton, Carrie Spencer, Bruce M Wentworth, Charles P Emerson, Kathryn R Wagner
Derepression of DUX4 in skeletal muscle has emerged as a likely cause of pathology in facioscapulohumeral muscular dystrophy (FSHD). Here we report on the use of antisense phosphorodiamidate morpholino oligonucleotides to suppress DUX4 expression and function in FSHD myotubes and xenografts. The most effective was phosphorodiamidate morpholino oligonucleotide FM10, which targets the polyadenylation signal of DUX4. FM10 had no significant cell toxicity, and RNA-seq analyses of FSHD and control myotubes revealed that FM10 down-regulated many transcriptional targets of DUX4, without overt off-target effects...
August 2016: Molecular Therapy: the Journal of the American Society of Gene Therapy
Ian J Robertson, Fadel Bennani, Ronan S Ryan, Waqar Khan, M Kevin Barry
BACKGROUND: Paediatric undifferentiated soft tissue sarcomas are a group of tumours that have remained diagnostically challenging. Recently, a subgroup of undifferentiated soft tissue sarcomas with a round to plump spindle cell morphology, expressing the CIC-DUX4 fusion transcript as a result of the t(4;19) or t(10;19) translocation have been identified. CASE PRESENTATION: We describe the first case of a CIC-DUX4 positive EWSR-1 negative undifferentiated small blue round cell sarcoma arising clinically in the scalp of an eight-year old boy...
2016: Diagnostic Pathology
Shamlal Mangray, Gino R Somers, Jie He, Shan Zhong, Mary Shago, Diana O Treaba, Kara A Lombardo, Siraj M Ali, Evgeny Yakirevich
No abstract text is available yet for this article.
September 2016: American Journal of Surgical Pathology
Mayumi Ito, Misawo Ishikawa, Masateru Kitajima, Jun Narita, Shinya Hattori, Otone Endo, Keisuke Goto
CIC-rearranged undifferentiated small round cell sarcoma (CIC-rearranged USRCS) is a recently established type of Ewing-like small round cell sarcomas, characterized by CIC gene rearrangement, most commonly CIC-DUX4 fusion. This report presents the second case of CIC-rearranged USRCS arising primarily in the cerebrum. A 64-year-old otherwise healthy woman presented with a 1 × 1 cm sized hemorrhagic subcortical tumor in the left temporo-parietal lobe. The tumor repeatedly recurred, and the patient underwent three surgeries, chemotherapy with doxorubicin and ifosfamide, and radiotherapy, as well as gamma knife surgery...
October 2016: Diagnostic Cytopathology
Isidro Machado, Samuel Navarro, Antonio Llombart-Bosch
Ewing-like sarcomas (ELS) are a heterogenous group of tumors that frequently affect pediatric and young adult patients. Accurate classification and distinction from the Ewing sarcoma family of tumor (ESFT) is decisive in patient management. ELS share a significant morphologic, immunohistochemical and clinical overlap with ESFT, thus the differential diagnosis is challenging, especially with atypical ESFT and tumors with unusual immunoprofiles or uncommon clinicoradiological findings. A subset of ELS harboring the CIC-DUX4 or BCOR-CCNB3 fusions has been described recently...
November 2016: Histology and Histopathology
Henrik Lilljebjörn, Rasmus Henningsson, Axel Hyrenius-Wittsten, Linda Olsson, Christina Orsmark-Pietras, Sofia von Palffy, Maria Askmyr, Marianne Rissler, Martin Schrappe, Gunnar Cario, Anders Castor, Cornelis J H Pronk, Mikael Behrendtz, Felix Mitelman, Bertil Johansson, Kajsa Paulsson, Anna K Andersson, Magnus Fontes, Thoas Fioretos
Fusion genes are potent driver mutations in cancer. In this study, we delineate the fusion gene landscape in a consecutive series of 195 paediatric B-cell precursor acute lymphoblastic leukaemia (BCP ALL). Using RNA sequencing, we find in-frame fusion genes in 127 (65%) cases, including 27 novel fusions. We describe a subtype characterized by recurrent IGH-DUX4 or ERG-DUX4 fusions, representing 4% of cases, leading to overexpression of DUX4 and frequently co-occurring with intragenic ERG deletions. Furthermore, we identify a subtype characterized by an ETV6-RUNX1-like gene-expression profile and coexisting ETV6 and IKZF1 alterations...
2016: Nature Communications
Si Ho Choi, Darko Bosnakovski, Jessica M Strasser, Erik A Toso, Michael A Walters, Michael Kyba
Facioscapulohumeral muscular dystrophy is a genetically dominant, currently untreatable muscular dystrophy. It is caused by mutations that enable expression of the normally silent DUX4 gene, which encodes a pathogenic transcription factor. A screen based on Tet-on DUX4-induced mouse myoblast death previously uncovered compounds from a 44,000-compound library that protect against DUX4 toxicity. Many of those compounds acted downstream of DUX4 in an oxidative stress pathway. Here, we extend this screen to an additional 160,000 compounds and, using greater stringency, identify a new set of DUX4-protective compounds...
August 2016: Journal of Biomolecular Screening
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