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https://www.readbyqxmd.com/read/28062084/a-t-4-19-pediatric-undifferentiated-sarcoma-with-a-novel-variant-of-the-cic-dux4-fusion-transcript
#1
Lenka Krskova, Eva Stejskalova, Edita Kabickova, Marcela Mrhalova, Roman Kodet
We report cytogenetic and molecular genetic analysis of a pediatric tumor positive for the CIC-DUX4 fusion. The tumor belongs to a rare, diagnostically challenging subgroup of undifferentiated small round cell sarcomas. A balanced t(4;19)(q35;q13.1-2) was identified by G-banding, as a sole cytogenetic finding. The translocation was also identified by the M-FISH technique. After RT-PCR, the tumor sample was positive for the CIC-DUX4 fusion. The PCR product contains a novel, so far unreported variant of the CIC-DUX4 fusion transcript, with a fusion of the exon 20 from the CIC gene and the exon 1 from the DUX4 gene...
December 16, 2016: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28040729/polycomb-repressive-complex-1-provides-a-molecular-explanation-for-repeat-copy-number-dependency-in-fshd-muscular-dystrophy
#2
Valentina Casa, Valeria Runfola, Stefano Micheloni, Arif Aziz, F Jeffrey Dilworth, Davide Gabellini
Repression of repetitive elements is crucial to preserve genome integrity and has been traditionally ascribed to constitutive heterochromatin pathways. FacioScapuloHumeral Muscular Dystrophy (FSHD), one of the most common myopathies, is characterized by a complex interplay of genetic and epigenetic events. The main FSHD form is linked to reduced copy number of the D4Z4 macrosatellite repeat on 4q35, causing loss of silencing and aberrant expression of the D4Z4-embedded DUX4 gene leading to disease. By an unknown mechanism, D4Z4 copy-number correlates with FSHD phenotype...
December 30, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/27922500/facioscapulohumeral-muscular-dystrophy
#3
Jeffrey M Statland, Rabi Tawil
PURPOSE OF REVIEW: This article describes the clinical characteristics, diagnosis, molecular pathogenesis, and treatment of facioscapulohumeral muscular dystrophy (FSHD). RECENT FINDINGS: FSHD comprises two genetically distinct types that converge on a common downstream pathway of the expression of the toxic protein DUX4. Approximately 95% of patients have FSHD type 1 (FSHD1), in which loss of DNA repetitive elements (D4Z4 repeats) in the subtelomeric region of chromosome 4q causes decreased methylation and epigenetic derepression of DUX4, a gene contained within each D4Z4 repeat...
December 2016: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/27919577/primary-cic-dux4-round-cell-sarcoma-of-the-kidney-a-treatment-refractory-tumor-with-poor-outcome
#4
Sébastien Bergerat, Philippe Barthelemy, Pascal Mouracade, Hervé Lang, Christian Saussine, Véronique Lindner, Didier Jacqmin
The CIC-DUX4 sarcoma is a subset of the undifferentiated small round cell sarcoma family, presently recognized as a new clinicopathological entity. It is a rare and highly aggressive tumor usually arising in the soft parts of the limbs and the trunk. Only a very few cases of primitive visceral CIC-DUX4 have been hitherto described. We report the case of a 29 year-old male patient with a primary CIC-DUX4 sarcoma of the kidney with lung metastasis. The outcome of the disease was rapidly unfavorable. Despite radical nephrectomy, the patient experienced an early local retroperitoneal recurrence associated with lung and liver metastases...
November 24, 2016: Pathology, Research and Practice
https://www.readbyqxmd.com/read/27906075/nuclear-bodies-reorganize-during-myogenesis-in-vitro-and-are-differentially-disrupted-by-expression-of-fshd-associated-dux4
#5
Sachiko Homma, Mary Lou Beermann, Bryant Yu, Frederick M Boyce, Jeffrey Boone Miller
BACKGROUND: Nuclear bodies, such as nucleoli, PML bodies, and SC35 speckles, are dynamic sub-nuclear structures that regulate multiple genetic and epigenetic processes. Additional regulation is provided by RNA/DNA handling proteins, notably TDP-43 and FUS, which have been linked to ALS pathology. Previous work showed that mouse cell line myotubes have fewer but larger nucleoli than myoblasts, and we had found that nuclear aggregation of TDP-43 in human myotubes was induced by expression of DUX4-FL, a transcription factor that is aberrantly expressed and causes pathology in facioscapulohumeral dystrophy (FSHD)...
December 1, 2016: Skeletal Muscle
https://www.readbyqxmd.com/read/27898077/corrigendum-recurrent-dux4-fusions-in-b-cell-acute-lymphoblastic-leukemia-of-adolescents-and-young-adults
#6
Takahiko Yasuda, Shinobu Tsuzuki, Masahito Kawazu, Fumihiko Hayakawa, Shinya Kojima, Toshihide Ueno, Naoto Imoto, Shinji Kohsaka, Akiko Kunita, Koichiro Doi, Toru Sakura, Toshiaki Yujiri, Eisei Kondo, Katsumichi Fujimaki, Yasunori Ueda, Yasutaka Aoyama, Shigeki Ohtake, Junko Takita, Eirin Sai, Masafumi Taniwaki, Mineo Kurokawa, Shinichi Morishita, Masashi Fukayama, Hitoshi Kiyoi, Yasushi Miyazaki, Tomoki Naoe, Hiroyuki Mano
No abstract text is available yet for this article.
November 29, 2016: Nature Genetics
https://www.readbyqxmd.com/read/27879517/dux4-immunohistochemistry-is-a-highly-sensitive-and-specific-marker-for-cic-dux4-fusion-positive-round-cell-tumor
#7
Bradford Siegele, Jon Roberts, Jennifer O Black, Erin Rudzinski, Sara O Vargas, Csaba Galambos
The histologic differential diagnosis of pediatric and adult round cell tumors is vast and includes the recently recognized entity CIC-DUX4 fusion-positive round cell tumor. The diagnosis of CIC-DUX4 tumor can be suggested by light microscopic and immunohistochemical features, but currently, definitive diagnosis requires ancillary genetic testing such as conventional karyotyping, fluorescence in situ hybridization, or molecular methods. We sought to determine whether DUX4 expression would serve as a fusion-specific immunohistochemical marker distinguishing CIC-DUX4 tumor from potential histologic mimics...
November 22, 2016: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27816329/a-complex-interplay-of-genetic-and-epigenetic-events-leads-to-abnormal-expression-of-the-dux4-gene-in-facioscapulohumeral-muscular-dystrophy
#8
REVIEW
Laura Virginia Gatica, Alberto Luis Rosa
Facioscapulohumeral muscular dystrophy (FSHD), a prevalent inherited human myopathy, develops following a complex interplay of genetic and epigenetic events. FSHD1, the more frequent genetic form, is associated with: (1) deletion of an integral number of 3.3 Kb (D4Z4) repeated elements at the chromosomal region 4q35, (2) a specific 4q35 subtelomeric haplotype denominated 4qA, and (3) decreased methylation of cytosines at the 4q35-linked D4Z4 units. FSHD2 is most often caused by mutations at the SMCHD1 (Structural Maintenance of Chromosomes Hinge Domain 1) gene, on chromosome 18p11...
December 2016: Neuromuscular Disorders: NMD
https://www.readbyqxmd.com/read/27815298/dux4-rearrangement-and-erg-deregulation-characterize-a-b-all-subtype
#9
(no author information available yet)
ERG deregulation by deletion or expression of a dominant-negative transcript drives a subset of B-ALL.
December 2016: Cancer Discovery
https://www.readbyqxmd.com/read/27790742/the-utility-of-etv1-etv4-and-etv5-rna-in-situ-hybridization-in-the-diagnosis-of-cic-dux-sarcomas
#10
Steven C Smith, Nallasivam Palanisamy, Elizabeth Martin, Jorge Almenara, Jonathan B McHugh, Eun-Young K Choi, David R Lucas, Bryan L Betz, Dafydd Thomas, Rajiv M Patel
AIMS: A recently characterized group of undifferentiated small round cell sarcomas harbours fusions of the genes CIC and DUX4. Studies report a distinctive gene expression profile for these sarcomas, including expression of E26 transformation-specific (ETS) family proto-oncogenic transcription factors ETV1, ETV4 and ETV5. To test the utility of an ancillary diagnostic technique for these tumours, we evaluated chromogenic RNA in-situ hybridization assays for ETV1, ETV4 and ETV5 as diagnostic adjuncts for this emerging group of highly malignant sarcomas...
October 27, 2016: Histopathology
https://www.readbyqxmd.com/read/27776115/deregulation-of-dux4-and-erg-in-acute-lymphoblastic-leukemia
#11
Jinghui Zhang, Kelly McCastlain, Hiroki Yoshihara, Beisi Xu, Yunchao Chang, Michelle L Churchman, Gang Wu, Yongjin Li, Lei Wei, Ilaria Iacobucci, Yu Liu, Chunxu Qu, Ji Wen, Michael Edmonson, Debbie Payne-Turner, Kerstin B Kaufmann, Shin-Ichiro Takayanagi, Erno Wienholds, Esmé Waanders, Panagiotis Ntziachristos, Sofia Bakogianni, Jingjing Wang, Iannis Aifantis, Kathryn G Roberts, Jing Ma, Guangchun Song, John Easton, Heather L Mulder, Xiang Chen, Scott Newman, Xiaotu Ma, Michael Rusch, Pankaj Gupta, Kristy Boggs, Bhavin Vadodaria, James Dalton, Yanling Liu, Marcus L Valentine, Li Ding, Charles Lu, Robert S Fulton, Lucinda Fulton, Yashodhan Tabib, Kerri Ochoa, Meenakshi Devidas, Deqing Pei, Cheng Cheng, Jun Yang, William E Evans, Mary V Relling, Ching-Hon Pui, Sima Jeha, Richard C Harvey, I-Ming L Chen, Cheryl L Willman, Guido Marcucci, Clara D Bloomfield, Jessica Kohlschmidt, Krzysztof Mrózek, Elisabeth Paietta, Martin S Tallman, Wendy Stock, Matthew C Foster, Janis Racevskis, Jacob M Rowe, Selina Luger, Steven M Kornblau, Sheila A Shurtleff, Susana C Raimondi, Elaine R Mardis, Richard K Wilson, John E Dick, Stephen P Hunger, Mignon L Loh, James R Downing, Charles G Mullighan
Chromosomal rearrangements deregulating hematopoietic transcription factors are common in acute lymphoblastic leukemia (ALL). Here we show that deregulation of the homeobox transcription factor gene DUX4 and the ETS transcription factor gene ERG is a hallmark of a subtype of B-progenitor ALL that comprises up to 7% of B-ALL. DUX4 rearrangement and overexpression was present in all cases and was accompanied by transcriptional deregulation of ERG, expression of a novel ERG isoform, ERGalt, and frequent ERG deletion...
December 2016: Nature Genetics
https://www.readbyqxmd.com/read/27744317/dux4-induces-a-transcriptome-more-characteristic-of-a-less-differentiated-cell-state-and-inhibits-myogenesis
#12
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
https://www.readbyqxmd.com/read/27722032/parp1-differentially-interacts-with-promoter-region-of-dux4-gene-in-fshd-myoblasts
#13
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
https://www.readbyqxmd.com/read/27672539/targeting-mrna-for-the-treatment-of-facioscapulohumeral-muscular-dystrophy
#14
REVIEW
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
https://www.readbyqxmd.com/read/27664537/targeted-next-generation-sequencing-of-cic-dux4-soft-tissue-sarcomas-demonstrates-low-mutational-burden-and-recurrent-chromosome-1p-loss
#15
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 chromosome 8 trisomy as a recurrent alteration; however, other driving alterations are largely unknown. Thus, we analyzed 11 formalin-fixed, paraffin-embedded CIC-DUX4 sarcoma tissue samples (including 3 sample pairs) using targeted Ion Torrent-based multiplexed polymerase chain reaction next-generation sequencing to characterize potential somatic driver alterations in 409 genes...
December 2016: Human Pathology
https://www.readbyqxmd.com/read/27634379/segregation-between-smchd1-mutation-d4z4-hypomethylation-and-facio-scapulo-humeral-dystrophy-a-case-report
#16
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
https://www.readbyqxmd.com/read/27616568/mouse-dux-is-myotoxic-and-shares-partial-functional-homology-with-its-human-paralog-dux4
#17
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
https://www.readbyqxmd.com/read/27562494/etv4-is-a-useful-marker-for-the-diagnosis-of-cic-rearranged-undifferentiated-round-cell-sarcomas-a-study-of-127-cases-including-mimicking-lesions
#18
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...
December 2016: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/27556182/dux4-controls-migration-of-mesenchymal-stem-cells-through-the-cxcr4-sdf1-axis
#19
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...
October 4, 2016: Oncotarget
https://www.readbyqxmd.com/read/27530253/model-systems-of-dux4-expression-recapitulate-the-transcriptional-profile-of-fshd-cells
#20
Sujatha Jagannathan, Sean C 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
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