Two classes of GGAA-microsatellites in a Ewing sarcoma context

(Nationwide Children's Hospital) In a study published in PLOS ONE, researchers describe two types of GGAA-microsatellites and their roles in EWS/FLI binding and gene regulation in Ewing sarcoma. Ewing sarcoma is the second most common pediatric bone malignancy. It is initiated by chromosomal translocation t(11;22)(q24;q12), which creates the fusion protein and oncogenic driver EWS/FLI.
Source: EurekAlert! - Cancer - Category: Cancer & Oncology Source Type: news

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Authors: Krumbholz M, Agaimy A, Stoehr R, Burger M, Wach S, Taubert H, Wullich B, Hartmann A, Metzler M Abstract There is increasing interest in the use of cell-free circulating tumor DNA (ctDNA) as a serum marker for therapy assessment in prostate cancer patients. Prostate cancer is characterized by relatively low numbers of mutations, and, in contrast to many other common epithelial cancers, commercially available single nucleotide mutation assays for quantification of ctDNA are insufficient for therapy assessment in this disease. However, prostate cancer shares some similarity with translocation-affected mesench...
Source: Disease Markers - Category: Laboratory Medicine Tags: Dis Markers Source Type: research
ConclusionsThis analysis of risk for cancer among Ewing sarcoma patients and their relatives indicates evidence for some increased cancer predisposition in this population which can be used to individualize consideration of potential treatment of patients and screening of patients and relatives.
Source: Cancer Medicine - Category: Cancer & Oncology Authors: Tags: ORIGINAL RESEARCH Source Type: research
, Cañete A Abstract Ewing sarcoma is a rare tumor developed in bone and soft tissues of children and teenagers. This entity is biologically led by a chromosomal translocation, typically including EWS and FLI1 genes. Little is known about Ewing sarcoma predisposition, although the role of environmental factors, ethnicity and certain polymorphisms on Ewing sarcoma susceptibility has been studied during the last few years. Its prevalence among cancer predisposition syndromes has also been thoroughly examined. This review summarizes the available evidence on predisposing factors involved in Ewing sarcoma suscep...
Source: Pathology Oncology Research - Category: Pathology Authors: Tags: Pathol Oncol Res Source Type: research
Conclusion Astroblastoma is an extremely rare CNS tumor. Morphological diagnosis is difficult, as the typical astroblastic rosettes may be present also in other CNS tumors, including some gliomas and ependymomas. In fact, AB can be considered as a morphologic pattern, which can be associated with a spectrum of molecular entities. Total resection is the best treatment; the precise role of chemotherapy and radiotherapy is still debated, particularly for high-grade tumors. We believe that DNA-methylation profiles represents an important instrument for confirming diagnosis, predicting prognosis and better defining the molec...
Source: Frontiers in Genetics - Category: Genetics & Stem Cells Source Type: research
ConclusionsTaken together, our results suggest that despite downregulated in EWS samples, this miRNA might represent a secondary genetic alteration derived from the pleiotropic cellular effects of the abnormal EWS/FLI1 transcription factor that does not affect tumor growth but instead, is related with the promotion of tumor invasion, not being suitable for future therapeutic intervention.
Source: Cancer Genetics - Category: Cancer & Oncology Source Type: research
Authors: Lee SY, Lim S, Cho DH Abstract A 16-year-old female with Ewing sarcoma, a very rare disease with poor prognosis in women, was admitted to the hospital with abdominal pain. Diagnostic laparotomy revealed the Ewing sarcoma originating from the extramural uterus. Histological examination yielded positive test results for CD99, vimentin, S-100, eosin 5-maleimide and periodic acid-Shiff. EWS-FLI1 type 1 translocation was confirmed. Fibroblast growth factor receptor (FGFR) 4 (c.1162G> A) and HRas proto-oncogene (HRAS; c.182A> G) mutations were also detected. At eight months following complete remission, pe...
Source: Experimental and Therapeutic Medicine - Category: General Medicine Tags: Exp Ther Med Source Type: research
Abstract Ewing sarcoma was first described in 1921 in the Proceedings of the New York Pathological Society by an eminent American pathologist from Cornell named James R. Ewing as a "diffuse endothelioma of bone." Since this initial description, more has been discovered regarding Ewing sarcoma and in the 1980's both Ewing sarcoma and peripheral primitive neuroectodermal tumors due to their similar features and shared identical genetic abnormality were grouped into a class of cancers entitled Ewing sarcoma family of tumors (ESFTs). Ewing sarcoma is the second most common pediatric osseous malignancy follow...
Source: Translational Research : the journal of laboratory and clinical medicine - Category: Laboratory Medicine Authors: Tags: Transl Res Source Type: research
Abstract Desmoplastic Small Round Cell Tumor (DSRCT) is a rare sarcoma tumor of adolescence and young adulthood, which harbors a recurrent chromosomal translocation between the Ewing's sarcoma gene (EWSR1) and the Wilms' tumor suppressor gene (WT1). Patients usually develop multiple abdominal tumors with liver and lymph node metastasis developing later. Survival is poor using a multimodal therapy that includes chemotherapy, radiation and surgical resection, new therapies are needed for better management of DSRCT. Triggering cell apoptosis is the scientific rationale of many cancer therapies. Here, we characterized...
Source: Neoplasia - Category: Cancer & Oncology Authors: Tags: Neoplasia Source Type: research
Conclusion: FISH is a useful adjunct in the diagnostic assessment of different types of soft tissue sarcomas. It is easy to set up, is relatively inexpensive and has the ability to diagnose sarcomas with great accuracy, especially in cases which can not be accurately classified even after thorough histological and immunohistochemical evaluation. It may play a very important role in the accurate diagnosis and correct management of patients. PMID: 29580035 [PubMed - in process]
Source: Asian Pacific Journal of Cancer Prevention - Category: Cancer & Oncology Tags: Asian Pac J Cancer Prev Source Type: research
EWS–FLI1 increases transcription to cause R-loops and block BRCA1 repair in Ewing sarcoma Nature 555, 7696 (2018). doi:10.1038/nature25748 Authors: Aparna Gorthi, July Carolina Romero, Eva Loranc, Lin Cao, Liesl A. Lawrence, Elicia Goodale, Amanda Balboni Iniguez, Xavier Bernard, V. Pragathi Masamsetti, Sydney Roston, Elizabeth R. Lawlor, Jeffrey A. Toretsky, Kimberly Stegmaier, Stephen L. Lessnick, Yidong Chen &Alexander J. R. Bishop Ewing sarcoma is an aggressive paediatric cancer of the bone and soft tissue. It results from a chromosomal translocation, predominantly t(11;22)(q24:q12), that fus...
Source: Nature - Category: Research Authors: Tags: Letter Source Type: research
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