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B. Sadikovic, C. Graham, M. Ho, M. Zielenska and G. R. Somers, “Immunohistochemical Expression and Cluster Analysis of Mesenchymal and Neural Stem Cell-Associated Proteins in Pediatric Soft Tissue Sarcomas,” Pediatric and Development Pathology, Vol. 14, No. 4, 2011, pp. 259-272. doi:10.2350/10-08-0890-OA.1

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• TITLE: Diagnostic Strategies and Treatment for Ewing’s Sarcoma

  AUTHORS: Roumiana Todorova, Atanas T. Atanasov

  KEYWORDS: Ewing’s Sarcoma Family of Tumors; Cancer Stem Cells; Immunotherapy; Hematopoietic Progenitor Cell Transplant; Diagnostic Strategies; ESFT Therapy

  JOURNAL NAME: International Journal of Clinical Medicine, Vol.3 No.6, November 27, 2012

  ABSTRACT: Ewing’s sarcoma is an enigmatic malignancy of progenitor cell origin, driven by transcription factor oncogenic fusions. About 85% of ESFT cases harbor the t(11;22) translocation and express the fusion protein EWS-FLI. Both bone marrow-derived human Mesenchymal stem cells and Neural crest stem cells are permissive for EWS-FLI1 expression that initiates transition to ESFT-like cellular phenotype. Diagnosis of Ewing’s tumor is based on pathologic and molecular findings. The hypoxia enhances the malignancy of ESFT invasive capacity. An ALDHhigh subpopulation of Ewing’s sarcoma cells, capable of self-renewal, tumor initiation and resistant to chemotherapy in vitro, are not resistant to YK-4-279. Intensive high-dose chemotherapy followed by stem-cell reconstitution was used for ESFT patients in second remission. Plerixafor in combination with G-CSF is an effective enhance stem cell mobilization regimen for stem cell collection with lowest success rate in patients with neuroblastoma. The ESFT-derived antigens EZH2(666) and CHM1(319) are suitable targets for protective allo-restricted human CD8(+) T-cell responses against non-immunogenic ESFT. Primitive neuroectodermal features and MSC origin are both compatible with G(D2) aberrant expression and explore G(D2) immune targeting in ESFT.