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Randolph ME, Afifi M, Gorthi A, Weil R, Wilky BA, Weinreb J, Ciero P, Hoeve NT, van Diest PJ, Raman V, Bishop AJ, Loeb DM. RNA helicase DDX3 regulates RAD51 localization and DNA damage repair in Ewing sarcoma. iScience 2024; 27:108925. [PMID: 38323009 PMCID: PMC10844834 DOI: 10.1016/j.isci.2024.108925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 12/09/2023] [Accepted: 01/12/2024] [Indexed: 02/08/2024] Open
Abstract
We previously demonstrated that RNA helicase DDX3X (DDX3) can be a therapeutic target in Ewing sarcoma (EWS), but its role in EWS biology remains unclear. The present work demonstrates that DDX3 plays a unique role in DNA damage repair (DDR). We show that DDX3 interacts with several proteins involved in homologous recombination, including RAD51, RECQL1, RPA32, and XRCC2. In particular, DDX3 colocalizes with RAD51 and RNA:DNA hybrid structures in the cytoplasm of EWS cells. Inhibition of DDX3 RNA helicase activity increases cytoplasmic RNA:DNA hybrids, sequestering RAD51 in the cytoplasm, which impairs nuclear translocation of RAD51 to sites of double-stranded DNA breaks, thus increasing sensitivity of EWS to radiation treatment, both in vitro and in vivo. This discovery lays the foundation for exploring new therapeutic approaches directed at manipulating DDR protein localization in solid tumors.
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Affiliation(s)
- Matthew E. Randolph
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Marwa Afifi
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Aparna Gorthi
- Greehey Children’s Cancer Research Institute and Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX, USA
| | - Rachel Weil
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Breelyn A. Wilky
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD, USA
| | - Joshua Weinreb
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Paul Ciero
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Natalie ter Hoeve
- Department of Pathology, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Paul J. van Diest
- Department of Pathology, University Medical Centre Utrecht, Utrecht, the Netherlands
| | - Venu Raman
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD, USA
- Department of Radiology, Johns Hopkins University, Baltimore, MD, USA
- Department of Pharmacology, Johns Hopkins University, Baltimore, MD, USA
| | - Alexander J.R. Bishop
- Greehey Children’s Cancer Research Institute and Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX, USA
| | - David M. Loeb
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD, USA
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Randolph ME, Afifi M, Gorthi A, Weil R, Wilky BA, Weinreb J, Ciero P, ter Hoeve N, van Diest PJ, Raman V, Bishop AJR, Loeb DM. RNA Helicase DDX3 Regulates RAD51 Localization and DNA Damage Repair in Ewing Sarcoma. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.10.544474. [PMID: 37333164 PMCID: PMC10274875 DOI: 10.1101/2023.06.10.544474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
We previously demonstrated that RNA helicase DDX3X (DDX3) can be a therapeutic target in Ewing sarcoma (EWS), but its role in EWS biology remains unclear. The present work demonstrates that DDX3 plays a unique role in DNA damage repair (DDR). We show that DDX3 interacts with several proteins involved in homologous recombination, including RAD51, RECQL1, RPA32, and XRCC2. In particular, DDX3 colocalizes with RAD51 and RNA:DNA hybrid structures in the cytoplasm of EWS cells. Inhibition of DDX3 RNA helicase activity increases cytoplasmic RNA:DNA hybrids, sequestering RAD51 in the cytoplasm, which impairs nuclear translocation of RAD51 to sites of double-stranded DNA breaks thus increasing sensitivity of EWS to radiation treatment, both in vitro and in vivo. This discovery lays the foundation for exploring new therapeutic approaches directed at manipulating DDR protein localization in solid tumors.
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Affiliation(s)
- Matthew E. Randolph
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY
| | - Marwa Afifi
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, MD
| | - Aparna Gorthi
- Greehey Children’s Cancer Research Institute and Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX
| | - Rachel Weil
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY
| | - Breelyn A. Wilky
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD
| | - Joshua Weinreb
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY
| | - Paul Ciero
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY
| | - Natalie ter Hoeve
- Department of Pathology, University Medical Centre Utrecht, The Netherlands
| | - Paul J. van Diest
- Department of Pathology, University Medical Centre Utrecht, The Netherlands
| | - Venu Raman
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD
- Department of Radiology, Johns Hopkins University, Baltimore, MD
- Department of Pharmacology, Johns Hopkins University, Baltimore, MD
| | - Alexander J. R. Bishop
- Greehey Children’s Cancer Research Institute and Department of Cell Systems & Anatomy, UT Health San Antonio, San Antonio, TX
| | - David M. Loeb
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, Bronx, NY
- Department of Pediatrics, Albert Einstein College of Medicine, Bronx, NY
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD
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François P, Thibaud V, Pierre VP, Marion J, Delphine B, Frederic C, Christine C, Janick S, Rosine G, Nadim F. Special features of sarcomas developed in patients with Lynch syndrome: a systematic review. Crit Rev Oncol Hematol 2023:104055. [PMID: 37301271 DOI: 10.1016/j.critrevonc.2023.104055] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/12/2023] Open
Abstract
Lynch syndrome (LS) is a genetic predisposition leading to colorectal and non-colorectal tumors such as endometrial, upper urinary tract, small intestine, ovarian, gastric, biliary duct cancers and glioblastoma. Though not classically associated with LS, growing literature suggests that sarcomas might develop in patients with LS. This systematic review of literature identified 44 studies (N=95) of LS patients who developed sarcomas. It seems that most sarcomas developed in patients with a germline mutation of MSH2 (57%) exhibit a dMMR (81%) or MSI (77%) phenotype, as in other LS-tumors. Although undifferentiated pleomorphic sarcoma (UPS), leiomyosarcoma, and liposarcoma remain the most represented histologic subtype, a higher proportion of rhabdomyosarcoma (10%, especially pleomorphic rhabdomyosarcoma) is reported. Further studies are required to better characterize this sub-population.
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Affiliation(s)
- Poumeaud François
- Department of Digestive Oncology, University Hospital of Toulouse (IUCT Rangueil Larrey), France; Department of Oncology, Toulouse Cancer Center (IUCT - Oncopole), France
| | - Valentin Thibaud
- Department of Oncology, Toulouse Cancer Center (IUCT - Oncopole), France; OncoSarc, INSERM U1037, Toulouse Cancer Research Center (CRCT), France
| | - Vande Perre Pierre
- Department of oncogenetic, Toulouse Cancer Center (IUCT - Oncopole), France
| | - Jaffrelot Marion
- Department of Digestive Oncology, University Hospital of Toulouse (IUCT Rangueil Larrey), France; Department of oncogenetic, Toulouse Cancer Center (IUCT - Oncopole), France
| | - Bonnet Delphine
- Department of oncogenetic, Toulouse Cancer Center (IUCT - Oncopole), France; Department of Internal medicine and Immunology, University Hospital of Toulouse (IUCT Rangueil Larrey), France
| | - Chibon Frederic
- OncoSarc, INSERM U1037, Toulouse Cancer Research Center (CRCT), France
| | - Chevreau Christine
- Department of Oncology, Toulouse Cancer Center (IUCT - Oncopole), France
| | - Selves Janick
- OncoSarc, INSERM U1037, Toulouse Cancer Research Center (CRCT), France; Department of Pathology, University Hospital of Toulouse ( IUCT- Oncopole) France
| | - Guimbaud Rosine
- Department of Digestive Oncology, University Hospital of Toulouse (IUCT Rangueil Larrey), France; OncoSarc, INSERM U1037, Toulouse Cancer Research Center (CRCT), France; Department of oncogenetic, Toulouse Cancer Center (IUCT - Oncopole), France
| | - Fares Nadim
- Department of Digestive Oncology, University Hospital of Toulouse (IUCT Rangueil Larrey), France; OncoSarc, INSERM U1037, Toulouse Cancer Research Center (CRCT), France.
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Pilavaki P, Panagi M, Arifi S, Jones RL, Stylianopoulos T, Constantinidou A. Exploring the landscape of immunotherapy approaches in sarcomas. Front Oncol 2023; 12:1069963. [PMID: 36686827 PMCID: PMC9853527 DOI: 10.3389/fonc.2022.1069963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/19/2022] [Indexed: 01/09/2023] Open
Abstract
Sarcomas comprise a heterogenous group of malignancies, of more than 100 different entities, arising from mesenchymal tissue, and accounting for 1% of adult malignancies. Surgery, radiotherapy and systemic therapy constitute the therapeutic armamentarium against sarcomas, with surgical excision and conventional chemotherapy, remaining the mainstay of treatment for local and advanced disease, respectively. The prognosis for patients with metastatic disease is dismal and novel therapeutic approaches are urgently required to improve survival outcomes. Immunotherapy, is a rapidly evolving field in oncology, which has been successfully applied in multiple cancers to date. Immunomodulating antibodies, adoptive cellular therapy, cancer vaccines, and cytokines have been tested in patients with different types of sarcomas through clinical trials, pilot studies, retrospective and prospective studies. The results of these studies regarding the efficacy of different types of immunotherapies in sarcomas are conflicting, and the application of immunotherapy in daily clinical practice remains limited. Additional clinical studies are ongoing in an effort to delineate the role of immunotherapy in patients with specific sarcoma subtypes.
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Affiliation(s)
- Pampina Pilavaki
- Medical School, University of Cyprus, Nicosia, Cyprus,Medical Oncology, Bank of Cyprus Oncology Center, Nicosia, Cyprus
| | - Myrofora Panagi
- Cancer Biophysics Laboratory, Department of Mechanical and Manufacturing Engineering University of Cyprus, Nicosia, Cyprus
| | - Samia Arifi
- Medical Oncology Department, Hassan II University Hospital/Faculty of Medicine and Pharmacy University of Sidi Mohamed Ben Abdellah, Fez, Morocco
| | - Robin L. Jones
- Sarcoma Unit, Royal Marsden National Health Service (NHS) Foundation Trust, London, London, United Kingdom,Sarcoma Clinical Trial Unit, Institute of Cancer Research, London, United Kingdom
| | - Triantafyllos Stylianopoulos
- Cancer Biophysics Laboratory, Department of Mechanical and Manufacturing Engineering University of Cyprus, Nicosia, Cyprus,*Correspondence: Anastasia Constantinidou, ; Triantafyllos Stylianopoulos,
| | - Anastasia Constantinidou
- Medical School, University of Cyprus, Nicosia, Cyprus,Medical Oncology, Bank of Cyprus Oncology Center, Nicosia, Cyprus,Cyprus Cancer Research Institute, Nicosia, Cyprus,*Correspondence: Anastasia Constantinidou, ; Triantafyllos Stylianopoulos,
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Hypoxia-activated neuropeptide Y/Y5 receptor/RhoA pathway triggers chromosomal instability and bone metastasis in Ewing sarcoma. Nat Commun 2022; 13:2323. [PMID: 35484119 PMCID: PMC9051212 DOI: 10.1038/s41467-022-29898-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 04/05/2022] [Indexed: 11/08/2022] Open
Abstract
Adverse prognosis in Ewing sarcoma (ES) is associated with the presence of metastases, particularly in bone, tumor hypoxia and chromosomal instability (CIN). Yet, a mechanistic link between these factors remains unknown. We demonstrate that in ES, tumor hypoxia selectively exacerbates bone metastasis. This process is triggered by hypoxia-induced stimulation of the neuropeptide Y (NPY)/Y5 receptor (Y5R) pathway, which leads to RhoA over-activation and cytokinesis failure. These mitotic defects result in the formation of polyploid ES cells, the progeny of which exhibit high CIN, an ability to invade and colonize bone, and a resistance to chemotherapy. Blocking Y5R in hypoxic ES tumors prevents polyploidization and bone metastasis. Our findings provide evidence for the role of the hypoxia-inducible NPY/Y5R/RhoA axis in promoting genomic changes and subsequent osseous dissemination in ES, and suggest that targeting this pathway may prevent CIN and disease progression in ES and other cancers rich in NPY and Y5R. Ewing sarcoma tumour cells frequently metastasize to the bone but the molecular mechanisms governing this process are not well understood. Here, the authors show that neuropeptide Y/Y5 receptor pathway is activated in the hypoxic tumour microenvironment, which results in cytokinesis defects and chromosomal instability, leading to bone invasion.
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Gartrell J, Rodriguez-Galindo C. Ewing sarcoma: investigational mono- and combination therapies in clinical trials. Expert Opin Investig Drugs 2021; 30:653-663. [PMID: 33870845 DOI: 10.1080/13543784.2021.1919623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
INTRODUCTION Over the last decades, multi-institutional clinical trials have resulted in significant improvements in the outcomes of patients with localized Ewing sarcoma; however, those with metastatic and recurrent diseases continue to fare poorly. More recently, advancements made in understanding the biology of the disease and mechanisms of response to therapy have opened the door for the incorporation of targeted therapies. Here we review the current state of treatment for Ewing sarcoma and the most recent preclinical advancements that have the potential to translate to improved care. AREAS COVERED This review provides a general overview of the most recent clinical trials completed in Ewing sarcoma, as well as the preclinical and translational data that has the potential to be incorporated into clinical trials. A PubMed review as well as a review of published meeting abstracts was used to compose this review. EXPERT OPINION While dose-intenstifying strategies have failed to lead to improvements in outcomes for patients with the highest-risk disease, recent preclinical advancements have shed light on potential new targeted strategies. The lack of early-phase clinical trial responses should not deter us from further developing these agents, but instead should guide us in designing novel combination strategies.
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Affiliation(s)
- Jessica Gartrell
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, United States of America
| | - Carlos Rodriguez-Galindo
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, United States of America.,Department of Global Pediatric Medicine, St. Jude Children's Research Hospital, Memphis, United States of America
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Di Mauro I, Mescam-Mancini L, Chetaille B, Lae M, Pierron G, Dadone-Montaudie B, Bazin A, Bouvier C, Michiels JF, Pedeutour F. MDM2 amplification and fusion gene ss18-ssx in a poorly differentiated synovial sarcoma: A rare but puzzling conjunction. Neoplasia 2020; 22:311-321. [PMID: 32559641 PMCID: PMC7303914 DOI: 10.1016/j.neo.2020.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 04/30/2020] [Accepted: 05/17/2020] [Indexed: 01/30/2023]
Abstract
The detection of specific alterations by genetic analyses has been included in the diagnostic criterions of the World Health Organization's classification of soft tissues tumors since 2013. The presence of a SS18 rearrangement is pathognomonic of synovial sarcoma (SS). MDM2 amplification is strongly correlated to well-differentiated or dedifferentiated liposarcoma (DDLPS) in the context of sarcoma. We identified one case of poorly differentiated sarcoma harboring both SS18-SSX2 fusion and MDM2 amplification. The review of the literature showed high discrepancies, concerning the incidence of MDM2 amplification in SS: from 1.4% up to 40%. Our goal was to precisely determine the specific clinico-pathological features of this case and to estimate the frequency and characteristics of the association of SS18-SSX fusion/MDM2 amplification in sarcomas. We performed a retrospective and prospective study in 96 sarcomas, (56 SS and 40 DDLPS), using FISH and/or array-CGH to detect MDM2 amplification and SS18 rearrangement. None of the 96 cases presented both genetic alterations. Among the SS, only the index case (1/57: 1.7 %) presented the double anomaly. We concluded that MDM2 amplification in SS is a very rare event. The final diagnosis of the index case was a SS with SS18-SSX2 and MDM2 amplification as a secondary alteration. If the detection of MDM2 amplification is performed first in a poorly differentiated sarcoma, that may lead to not search other anomalies such as SS18 rearrangement and therefore to an erroneous diagnosis. This observation emphasizes the strong complementarity between histomorphology, immunohistochemistry and molecular studies in sarcoma diagnosis.
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Affiliation(s)
- Ilaria Di Mauro
- Laboratory of Solid Tumor Genetics, University Hospital of Nice-Côte d'Azur University, Nice, France; Laboratory of Solid Tumor Genetics, Institute for Research on Cancer and Aging of Nice (IRCAN), CNRS UMR 7284/INSERM U1081, Nice, France
| | | | - Bruno Chetaille
- Department of Cancer Biology, Paoli-Calmettes Institute, Marseille, France
| | - Marick Lae
- Department of Pathology, Curie Institute, Paris, France; Department of Pathology, Henri Becquerel Center, INSERM U1245, UniRouen Normandie University, Rouen, France
| | | | - Bérengère Dadone-Montaudie
- Laboratory of Solid Tumor Genetics, University Hospital of Nice-Côte d'Azur University, Nice, France; Laboratory of Solid Tumor Genetics, Institute for Research on Cancer and Aging of Nice (IRCAN), CNRS UMR 7284/INSERM U1081, Nice, France; Central Laboratory of Pathology, University Hospital of Nice-Côte d'Azur University, Nice, France
| | - Audrey Bazin
- Laboratory of Solid Tumor Genetics, University Hospital of Nice-Côte d'Azur University, Nice, France; Laboratory of Solid Tumor Genetics, Institute for Research on Cancer and Aging of Nice (IRCAN), CNRS UMR 7284/INSERM U1081, Nice, France
| | - Corinne Bouvier
- Department of Pathology, Timone Hospital, APHM, Marseille, France
| | - Jean-François Michiels
- Central Laboratory of Pathology, University Hospital of Nice-Côte d'Azur University, Nice, France
| | - Florence Pedeutour
- Laboratory of Solid Tumor Genetics, University Hospital of Nice-Côte d'Azur University, Nice, France; Laboratory of Solid Tumor Genetics, Institute for Research on Cancer and Aging of Nice (IRCAN), CNRS UMR 7284/INSERM U1081, Nice, France.
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Liang J, Chen D, Chen L, She X, Zhang H, Xiao Y. The potentiality of immunotherapy for sarcomas: a summary of potential predictive biomarkers. Future Oncol 2020; 16:1211-1223. [PMID: 32396026 DOI: 10.2217/fon-2020-0118] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Sarcomas are rare and heterogeneous malignant tumors of mesenchymal origin. A total of 25-50% of patients treated with initial curative intent will develop as recurrent and metastatic disease. In the recurrent and metastatic setting, effect of chemotherapy is limited; therefore, more effective therapies are urgently desired. As a brake for activation of T cell, PD-1/PD-L1 plays a crucial role in the progression of tumor by altering status of immune surveillance. Some success has been acquired recently in the use of PD-1/PD-L1 inhibitors for the treatment of several solid tumors, for examples, non-small-cell lung cancer and melanoma. Immunotherapeutic strategies based on PD-1/PD-L1 for sarcomas have also been explored these years. As in other cancers, major challenges are identification of biomarkers to predict response for immunotherapy, optimization of patient's benefit and minimization of side effects. Therefore, we focused on potential biomarkers of immunotherapy for treatment of sarcomas in this review.
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Affiliation(s)
- Jin Liang
- Department of Medical Oncology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan province 650032, PR China
| | - Dedian Chen
- Department of Breast Surgery, The Third Affiliated Hospital of Kunming Medical University, Tumor Hospital of Yunnan, Kunming, Yunnan 650118, PR China
| | - Liyao Chen
- Department of Radiotherapy, The First People's Hospital of Yuxi City. Yuxi, Yunnan province 653100, PR China
| | - Xueke She
- The Medical Department, 3D Medicines Inc., Shanghai, 201114, PR China
| | - Hushan Zhang
- The Medical Department, 3D Medicines Inc., Shanghai, 201114, PR China.,Department of Immunology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, PR China
| | - Yanbin Xiao
- Department of Orthopaedics, The Third Affiliated Hospital of Kunming Medical University, Tumor Hospital of Yunnan, Kunming, Yunnan province 650118, PR China
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9
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Kim J, Kim JH, Kang HG, Park SY, Yu JY, Lee EY, Oh SE, Kim YH, Yun T, Park C, Cho SY, You HJ. Integrated molecular characterization of adult soft tissue sarcoma for therapeutic targets. BMC MEDICAL GENETICS 2018; 19:216. [PMID: 30598078 PMCID: PMC6311917 DOI: 10.1186/s12881-018-0722-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background Several studies have investigated the molecular drivers and therapeutic targets in adult soft tissue sarcomas. However, such studies are limited by the genomic heterogeneity and rarity of sarcomas, particularly in those with complex and unbalanced karyotypes. Additional biomarkers are needed across sarcoma types to improve therapeutic strategies. To investigate the molecular characteristics of complex karyotype sarcomas (CKSs) for therapeutic targets, we performed genomic profiling. Results The mutational landscape showed that TP53, ATRX, and PTEN genes were highly mutated. CKS samples were categorized into three groups based on copy number variations that were associated with CDK4 and RB1 signatures. Integrated analysis of genomic and transcriptomic data revealed several pathways related to PDGFR, which could be a strategic target for anti-sarcoma therapy. Conclusions This study provides a detailed molecular classification of CKSs and proposes several therapeutic targets. Targeted or combinational therapies for treating CKS should be considered before chemotherapy. Electronic supplementary material The online version of this article (10.1186/s12881-018-0722-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jihyun Kim
- Clinical Genomic Analysis Branch, Research Institute, National Cancer Center, 323 Ilsan-ro, Ilsandong-gu, Goyang, Gyeonggi, 10408, South Korea
| | - June Hyuk Kim
- Orthopaedic Oncology Clinic, Hospital, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Hyun Guy Kang
- Orthopaedic Oncology Clinic, Hospital, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea.,Department of Cancer Biomedical Science, NCC-GCSP, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Seog Yun Park
- Division of Pathology, Hospital, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Jung Yeon Yu
- Translational Research Branch, Research Institute, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Eun Young Lee
- Translational Research Branch, Research Institute, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Sung Eun Oh
- Orthopaedic Oncology Clinic, Hospital, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Young Ho Kim
- Rare Cancer Branch, Research Institute, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Tak Yun
- Rare Cancer Branch, Research Institute, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea
| | - Charny Park
- Clinical Genomic Analysis Branch, Research Institute, National Cancer Center, 323 Ilsan-ro, Ilsandong-gu, Goyang, Gyeonggi, 10408, South Korea
| | - Soo Young Cho
- Clinical Genomic Analysis Branch, Research Institute, National Cancer Center, 323 Ilsan-ro, Ilsandong-gu, Goyang, Gyeonggi, 10408, South Korea.
| | - Hye Jin You
- Department of Cancer Biomedical Science, NCC-GCSP, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea. .,Translational Research Branch, Research Institute, National Cancer Center, Goyang, Gyeonggi, 10408, South Korea.
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10
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McCaughan GJB, Fulham MJ, Mahar A, Soper J, Hong AM, Stalley PD, Tattersall MHN, Bhadri VA. Programmed cell death-1 blockade in recurrent disseminated Ewing sarcoma. J Hematol Oncol 2016; 9:48. [PMID: 27259563 PMCID: PMC4891829 DOI: 10.1186/s13045-016-0278-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 05/25/2016] [Indexed: 02/02/2023] Open
Abstract
Background Ewing sarcoma (EWS) is a malignant tumour of bone and soft tissue, and although many patients are cured with conventional multimodal therapy, those with recurrent or metastatic disease have a poor prognosis. Genomic instability and programmed cell death ligand-1 (PD-L1) expression have been identified in EWS, providing a rationale for treatment with agents that block the programmed cell death-1 (PD-1) receptor. Case presentation In this report, we describe a heavily pre-treated patient with recurrent metastatic EWS who achieved a clinical and radiological remission with PD-1 blockade. Conclusions To our knowledge, this is the first reported case demonstrating efficacy of PD-1 blockade in EWS. This warrants further investigation in particular given the poor prognosis in patients with recurrent or metastatic disease.
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Affiliation(s)
| | - Michael J Fulham
- Royal Prince Alfred Hospital, Camperdown, NSW, Australia.,Sydney Medical School, University of Sydney, Sydney, NSW, Australia
| | | | - Judy Soper
- Royal Prince Alfred Hospital, Camperdown, NSW, Australia.,Specialist Magnetic Resonance Imaging, Newton, NSW, Australia
| | - Angela M Hong
- Sydney Medical School, University of Sydney, Sydney, NSW, Australia.,Chris O'Brien Lifehouse, 119-143 Missenden Road, Camperdown, NSW, 2050, Australia
| | - Paul D Stalley
- Royal Prince Alfred Hospital, Camperdown, NSW, Australia
| | - Martin H N Tattersall
- Sydney Medical School, University of Sydney, Sydney, NSW, Australia.,Chris O'Brien Lifehouse, 119-143 Missenden Road, Camperdown, NSW, 2050, Australia
| | - Vivek A Bhadri
- Sydney Medical School, University of Sydney, Sydney, NSW, Australia. .,Chris O'Brien Lifehouse, 119-143 Missenden Road, Camperdown, NSW, 2050, Australia.
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11
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Sand LGL, Szuhai K, Hogendoorn PCW. Sequencing Overview of Ewing Sarcoma: A Journey across Genomic, Epigenomic and Transcriptomic Landscapes. Int J Mol Sci 2015; 16:16176-215. [PMID: 26193259 PMCID: PMC4519945 DOI: 10.3390/ijms160716176] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 07/03/2015] [Accepted: 07/07/2015] [Indexed: 12/17/2022] Open
Abstract
Ewing sarcoma is an aggressive neoplasm occurring predominantly in adolescent Caucasians. At the genome level, a pathognomonic EWSR1-ETS translocation is present. The resulting fusion protein acts as a molecular driver in the tumor development and interferes, amongst others, with endogenous transcription and splicing. The Ewing sarcoma cell shows a poorly differentiated, stem-cell like phenotype. Consequently, the cellular origin of Ewing sarcoma is still a hot discussed topic. To further characterize Ewing sarcoma and to further elucidate the role of EWSR1-ETS fusion protein multiple genome, epigenome and transcriptome level studies were performed. In this review, the data from these studies were combined into a comprehensive overview. Presently, classical morphological predictive markers are used in the clinic and the therapy is dominantly based on systemic chemotherapy in combination with surgical interventions. Using sequencing, novel predictive markers and candidates for immuno- and targeted therapy were identified which were summarized in this review.
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Affiliation(s)
- Laurens G L Sand
- Department of Pathology, Leiden University Medical Center, Leiden 2333 ZA, The Netherlands.
| | - Karoly Szuhai
- Department of Molecular Cell Biology, Leiden University Medical Center, Leiden 2333 ZA, The Netherlands.
| | - Pancras C W Hogendoorn
- Department of Pathology, Leiden University Medical Center, Leiden 2333 ZA, The Netherlands.
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Monument MJ, Johnson KM, McIlvaine E, Abegglen L, Watkins WS, Jorde LB, Womer RB, Beeler N, Monovich L, Lawlor ER, Bridge JA, Schiffman JD, Krailo MD, Randall RL, Lessnick SL. Clinical and biochemical function of polymorphic NR0B1 GGAA-microsatellites in Ewing sarcoma: a report from the Children's Oncology Group. PLoS One 2014; 9:e104378. [PMID: 25093581 PMCID: PMC4122435 DOI: 10.1371/journal.pone.0104378] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 07/08/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The genetics involved in Ewing sarcoma susceptibility and prognosis are poorly understood. EWS/FLI and related EWS/ETS chimeras upregulate numerous gene targets via promoter-based GGAA-microsatellite response elements. These microsatellites are highly polymorphic in humans, and preliminary evidence suggests EWS/FLI-mediated gene expression is highly dependent on the number of GGAA motifs within the microsatellite. OBJECTIVES Here we sought to examine the polymorphic spectrum of a GGAA-microsatellite within the NR0B1 promoter (a critical EWS/FLI target) in primary Ewing sarcoma tumors, and characterize how this polymorphism influences gene expression and clinical outcomes. RESULTS A complex, bimodal pattern of EWS/FLI-mediated gene expression was observed across a wide range of GGAA motifs, with maximal expression observed in constructs containing 20-26 GGAA motifs. Relative to white European and African controls, the NR0B1 GGAA-microsatellite in tumor cells demonstrated a strong bias for haplotypes containing 21-25 GGAA motifs suggesting a relationship between microsatellite function and disease susceptibility. This selection bias was not a product of microsatellite instability in tumor samples, nor was there a correlation between NR0B1 GGAA-microsatellite polymorphisms and survival outcomes. CONCLUSIONS These data suggest that GGAA-microsatellite polymorphisms observed in human populations modulate EWS/FLI-mediated gene expression and may influence disease susceptibility in Ewing sarcoma.
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Affiliation(s)
- Michael J. Monument
- Sarcoma Services, Department of Orthopedic Surgery, University of Utah, Salt Lake City, Utah, United States of America
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, United States of America
| | - Kirsten M. Johnson
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, United States of America
| | - Elizabeth McIlvaine
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - Lisa Abegglen
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, United States of America
| | - W. Scott Watkins
- Department of Human Genetics and Eccles Institute of Human Genetics, University of Utah, Salt Lake City, Utah, United States of America
| | - Lynn B. Jorde
- Department of Human Genetics and Eccles Institute of Human Genetics, University of Utah, Salt Lake City, Utah, United States of America
| | - Richard B. Womer
- Division of Oncology, The Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Natalie Beeler
- Children's Oncology Group Biopathology Center, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States of America
| | - Laura Monovich
- Children's Oncology Group Biopathology Center, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States of America
| | - Elizabeth R. Lawlor
- Departments of Pediatrics and Pathology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Julia A. Bridge
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Nebraska Medical Center, Omaha, Nebraska, United States of America
| | - Joshua D. Schiffman
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, United States of America
- Division of Pediatric Hematology/Oncology, University of Utah, Salt Lake City, Utah, United States of America
| | - Mark D. Krailo
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America
| | - R. Lor Randall
- Sarcoma Services, Department of Orthopedic Surgery, University of Utah, Salt Lake City, Utah, United States of America
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, United States of America
| | - Stephen L. Lessnick
- Sarcoma Services, Department of Orthopedic Surgery, University of Utah, Salt Lake City, Utah, United States of America
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah, United States of America
- Division of Pediatric Hematology/Oncology, University of Utah, Salt Lake City, Utah, United States of America
- * E-mail:
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Alholle A, Brini AT, Gharanei S, Vaiyapuri S, Arrigoni E, Dallol A, Gentle D, Kishida T, Hiruma T, Avigad S, Grimer R, Maher ER, Latif F. Functional epigenetic approach identifies frequently methylated genes in Ewing sarcoma. Epigenetics 2013; 8:1198-204. [PMID: 24005033 DOI: 10.4161/epi.26266] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Using a candidate gene approach we recently identified frequent methylation of the RASSF2 gene associated with poor overall survival in Ewing sarcoma (ES). To identify effective biomarkers in ES on a genome-wide scale, we used a functionally proven epigenetic approach, in which gene expression was induced in ES cell lines by treatment with a demethylating agent followed by hybridization onto high density gene expression microarrays. After following a strict selection criterion, 34 genes were selected for expression and methylation analysis in ES cell lines and primary ES. Eight genes (CTHRC1, DNAJA4, ECHDC2, NEFH, NPTX2, PHF11, RARRES2, TSGA14) showed methylation frequencies of>20% in ES tumors (range 24-71%), these genes were expressed in human bone marrow derived mesenchymal stem cells (hBMSC) and hypermethylation was associated with transcriptional silencing. Methylation of NPTX2 or PHF11 was associated with poorer prognosis in ES. In addition, six of the above genes also showed methylation frequency of>20% (range 36-50%) in osteosarcomas. Identification of these genes may provide insights into bone cancer tumorigenesis and development of epigenetic biomarkers for prognosis and detection of these rare tumor types.
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Affiliation(s)
- Abdullah Alholle
- Centre for Rare Diseases and Personalized Medicine; School of Clinical and Experimental Medicine; University of Birmingham; Birmingham, UK
| | - Anna T Brini
- Department of Biomedical, Surgical, and Dental Sciences; University of Milan; Milan, Italy; I.R.C.C.S. Istituto Ortopedico Galeazzi; Milano, Italy
| | - Seley Gharanei
- Centre for Rare Diseases and Personalized Medicine; School of Clinical and Experimental Medicine; University of Birmingham; Birmingham, UK
| | - Sumathi Vaiyapuri
- Royal Orthopaedic Hospital Foundation Trust; Robert Aitken Institute of Clinical Research; University of Birmingham; Birmingham, UK
| | - Elena Arrigoni
- Department of Biomedical, Surgical, and Dental Sciences; University of Milan; Milan, Italy
| | - Ashraf Dallol
- Center of Excellence in Genomic Medicine Research and KACST Technology Innovation Center in Personalized Medicine; King Abdulaziz University; Jeddah, Kingdom of Saudi Arabia
| | - Dean Gentle
- Centre for Rare Diseases and Personalized Medicine; School of Clinical and Experimental Medicine; University of Birmingham; Birmingham, UK
| | | | - Toru Hiruma
- Department of Musculoskeletal tumor surgery; Kanagawa Cancer Center; Kanagawa, Japan
| | - Smadar Avigad
- Molecular Oncology; Felsenstein Medial Research Center; Pediatric Hematology Oncology; Schneider Children's Medical Center of Israel; Tel Aviv University; Tel Aviv, Israel
| | - Robert Grimer
- Royal Orthopaedic Hospital Foundation Trust; Robert Aitken Institute of Clinical Research; University of Birmingham; Birmingham, UK
| | - Eamonn R Maher
- Centre for Rare Diseases and Personalized Medicine; School of Clinical and Experimental Medicine; University of Birmingham; Birmingham, UK
| | - Farida Latif
- Centre for Rare Diseases and Personalized Medicine; School of Clinical and Experimental Medicine; University of Birmingham; Birmingham, UK
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Monument MJ, Johnson KM, Grossmann AH, Schiffman JD, Randall RL, Lessnick SL. Microsatellites with macro-influence in ewing sarcoma. Genes (Basel) 2012; 3:444-60. [PMID: 24704979 PMCID: PMC3899989 DOI: 10.3390/genes3030444] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/04/2012] [Accepted: 07/05/2012] [Indexed: 01/02/2023] Open
Abstract
Numerous molecular abnormalities contribute to the genetic derangements involved in tumorigenesis. Chromosomal translocations are a frequent source of these derangements, producing unique fusion proteins with novel oncogenic properties. EWS/ETS fusions in Ewing sarcoma are a prime example of this, resulting in potent chimeric oncoproteins with novel biological properties and a unique transcriptional signature essential for oncogenesis. Recent evidence demonstrates that EWS/FLI, the most common EWS/ETS fusion in Ewing sarcoma, upregulates gene expression using a GGAA microsatellite response element dispersed throughout the human genome. These GGAA microsatellites function as enhancer elements, are sites of epigenetic regulation and are necessary for EWS/FLI DNA binding and upregulation of principal oncogenic targets. An increasing number of GGAA motifs appear to substantially enhance EWS/FLI-mediated gene expression, which has compelling biological implications as these GGAA microsatellites are highly polymorphic within and between ethnically distinct populations. Historically regarded as junk DNA, this emerging evidence clearly demonstrates that microsatellite DNA plays an instrumental role in EWS/FLI-mediated transcriptional regulation and oncogenesis in Ewing sarcoma. This unprecedented role of GGAA microsatellite DNA in Ewing sarcoma provides a unique opportunity to expand our mechanistic understanding of how EWS/ETS fusions influence cancer susceptibility, prognosis and transcriptional regulation.
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Affiliation(s)
- Michael J Monument
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA.
| | - Kirsten M Johnson
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA.
| | - Allie H Grossmann
- Department of Pathology and Program in Molecular Medicine, University of Utah, Salt Lake City, UT 84112, USA.
| | - Joshua D Schiffman
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA.
| | - R Lor Randall
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA.
| | - Stephen L Lessnick
- Center for Children's Cancer Research, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA.
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Monument MJ, Lessnick SL, Schiffman JD, Randall RT. Microsatellite instability in sarcoma: fact or fiction? ISRN ONCOLOGY 2012; 2012:473146. [PMID: 23401795 PMCID: PMC3564276 DOI: 10.5402/2012/473146] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 05/02/2012] [Indexed: 01/03/2023]
Abstract
Microsatellite instability (MSI) is a unique molecular abnormality, indicative of a deficient DNA mismatch repair (MMR) system. Described and characterized in the colorectal cancer literature, the MSI-positive phenotype is predictive of disease susceptibility, pathogenesis, and prognosis. The clinical relevance of MSI in colorectal cancer has inspired similar inquisition within the sarcoma literature, although unfortunately, with very heterogeneous results. Evolving detection techniques, ill-defined sarcoma-specific microsatellite loci and small study numbers have hampered succinct conclusions. The literature does suggest that MSI in sarcoma is observed at a frequency similar to that of sporadic colorectal cancers, although there is little evidence to suggest that MSI-positive tumors share distinct biological attributes. Emerging evidence in Ewing sarcoma has demonstrated an intriguing mechanistic role of microsatellite DNA in the activation of key EWS/FLI-target genes. These findings provide an alternative perspective to the biological implications of microsatellite instability in sarcoma and warrant further investigation using sophisticated detection techniques, sensitive microsatellite loci, and appropriately powered study designs.
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Affiliation(s)
- Michael J Monument
- Sarcoma Services, Department of Orthopaedics, Huntsman Cancer Institute, University of Utah School of Medicine, 2000 Circle of Hope, Salt Lake City, UT 84112, USA
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Bilgen T, Keser I. hMLH1Gene is not Methylated in Osteosarcoma. Lab Med 2011. [DOI: 10.1309/lm0orpx97lnvohjh] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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SMARCB1/INI1 Protein Expression in Round Cell Soft Tissue Sarcomas Associated With Chromosomal Translocations Involving EWS: A Special Reference to SMARCB1/INI1 Negative Variant Extraskeletal Myxoid Chondrosarcoma. Am J Surg Pathol 2008; 32:1168-74. [DOI: 10.1097/pas.0b013e318161781a] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Avigad S, Naumov I, Ohali A, Jeison M, Berco GH, Mardoukh J, Stark B, Ash S, Cohen IJ, Meller I, Kollender Y, Issakov J, Yaniv I. Short telomeres: a novel potential predictor of relapse in Ewing sarcoma. Clin Cancer Res 2007; 13:5777-83. [PMID: 17908968 DOI: 10.1158/1078-0432.ccr-07-0308] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Despite advances in therapy, >50% of patients with Ewing sarcoma will relapse. The current prognostic factors are not optimal for risk prediction. Studies have shown that telomere length could predict outcome in different malignancies. Our aim was to evaluate whether telomere length could be a better prognostic factor in Ewing sarcoma and correlate the results with clinical variables, outcome, and chromosomal instability. EXPERIMENTAL DESIGN Telomere length was determined in the primary tumor and peripheral blood of 32 patients with Ewing sarcoma. Chromosomal instability was evaluated by combining classical cytogenetics, comparative genomic hybridization and random aneuploidy. Telomere length was correlated to clinical variables, chromosomal instability, and outcome. RESULTS In 75% of the tumors, changes in telomere length, when compared with the corresponding peripheral blood lymphocytes, were noted. The majority of changes consisted of a reduction in telomere length. Patients harboring shorter telomeres had a significantly adverse outcome (P = 0.015). Chromosomal instability was identified in 65% of tumors, significantly correlating with short telomeres (P = 0.0094). Using multivariate analysis, telomere length remained the only significant prognostic variable (P = 0.034). Patients with short telomeres had a 5.3-fold risk of relapse as compared to those with unchanged or longer telomeres. CONCLUSION We have shown that tumors with telomere length reduction result in genomic instability. In addition, telomere length reduction was the only significant predictor of outcome. We suggest that reduction of telomere length in tumor cells at diagnosis could serve as a prognostic marker in Ewing sarcoma.
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Affiliation(s)
- Smadar Avigad
- Molecular Oncology, Felsenstein Medical Research Center, Petach Tikva, Israel.
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Rahman FA, Ainscough JFX, Copeland N, Coverley D. Cancer-associated missplicing of exon 4 influences the subnuclear distribution of the DNA replication factor CIZ1. Hum Mutat 2007; 28:993-1004. [PMID: 17508423 DOI: 10.1002/humu.20550] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Cip1-interacting zinc finger protein 1 (CIZ1, also known as CDKN1A-interacting zinc finger protein 1) stimulates initiation of mammalian DNA replication and is normally tethered to the nuclear matrix within DNA replication foci. Here, we show that an alternatively spliced human CIZ1 variant, lacking exon 4 (Delta E4), is misexpressed as a consequence of intronic mutation in Ewing tumor (ET) cell lines. In all ET lines tested, exon 4 is skipped and an upstream mononucleotide repeat element is expanded to contain up to 28 thymidines, compared to 16 in controls. In exon-trap experiments, a 24T variant produced three-fold more exon skipping than a 16T variant, demonstrating a direct effect on splicing. In functional assays, Delta E4 protein retains replication activity, but fails to form subnuclear foci. Furthermore, coexpression of mouse Delta E4 with Ciz1 prevents Ciz1 from localizing appropriately, having a dominant negative effect on foci formation. The data show that conditional exclusion of exon 4 influences the spatial distribution of the Ciz1 protein within the nucleus, and raise the possibility that CIZ1 alternative splicing could influence organized patterns of DNA replication.
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Alldinger I, Schaefer KL, Goedde D, Ottaviano L, Dirksen U, Ranft A, Juergens H, Gabbert HE, Knoefel WT, Poremba C. Microsatellite instability in Ewing tumor is not associated with loss of mismatch repair protein expression. J Cancer Res Clin Oncol 2007; 133:749-59. [PMID: 17530287 DOI: 10.1007/s00432-007-0220-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2006] [Accepted: 03/23/2007] [Indexed: 12/21/2022]
Abstract
Only few clinical factors predict the prognosis of patients with Ewing tumors. Unfavorable outcome is associated with primary metastatic disease, age > 15 years, tumor volume above 200 ml, and the histological response to chemotherapy. The aim of this study was to elucidate the prevalence and clinical impact of microsatellite instability (MSI) together with the relation between MSI and mismatch repair protein expression in Ewing tumors. DNA from 61 primary Ewing tumors and 11 Ewing tumor cell lines was extracted and microsatellite analysis for the detection of instability or loss of heterozygosity was performed for the five markers of the Bethesda panel BAT25, BAT26, D5S346, D2S123, and D17S250, which represents the established marker panel for the analysis of hereditary non-polyposis colorectal carcinoma (HNPCC) patients. In addition, single nucleotide repeat regions of the two tumor genes BAX and transforming growth factor receptor II (TGFBR2) were also included. All of the 61 samples were suitable for LOH analysis and 55 for the determination of MSI-status. LOH of these microsatellite markers was detected in 9 of the 61 patients (14.8%). Over all, genetic instability, i.e. MSI and/or LOH, was detected in 17 tumors (27.9%). One out of the 11 tumor cell lines (STA ET1) was characterized by instability of all the five Bethesda markers, while from primary tumor samples, only one showed MSI in more than one microsatellite marker (D5S346 and D17S250, MSI-high). Eight of the fifty-five patients (14.5%) showed instability of one microsatellite locus (MSI-low). No instability was detected in BAT26, D2S123, BAX and TGFBR2. There was no significant correlation between MSI and loss of expression of mismatch repair proteins MLH1, MSH2, or MSH6. The impairment of the p53 signaling pathway (expression of TP53 and/or MDM2 by immunohistochemistry) was significantly associated with reduced overall survival (15 of 49 patients (30.6%), P = 0.0410, log-rank test). We conclude that MSI is not prevalent in Ewing tumor and that the nature of instability differs from the form observed in colorectal carcinoma, the model tumor of MSI. This is documented by the different pattern of MSI (no BAT26 instability) in Ewing tumors and the lack of a strict correlation between MSI-high and loss of expression of MSH2, MSH6 and MLH1.
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Affiliation(s)
- I Alldinger
- Department of General, Visceral and Pediatric Surgery, Heinrich-Heine-University of Düsseldorf, Düsseldorf, Germany
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Schmidt KH, Kolodner RD. Suppression of spontaneous genome rearrangements in yeast DNA helicase mutants. Proc Natl Acad Sci U S A 2006; 103:18196-201. [PMID: 17114288 PMCID: PMC1838729 DOI: 10.1073/pnas.0608566103] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Saccharomyces cerevisiae mutants lacking two of the three DNA helicases Sgs1, Srs2, and Rrm3 exhibit slow growth that is suppressed by disrupting homologous recombination. Cells lacking Sgs1 and Rrm3 accumulate gross-chromosomal rearrangements (GCRs) that are suppressed by the DNA damage checkpoint and by homologous recombination-defective mutations. In contrast, rrm3, srs2, and srs2 rrm3 mutants have wild-type GCR rates. GCR types in helicase double mutants include telomere additions, translocations, and broken DNAs healed by a complex process of hairpin-mediated inversion. Spontaneous activation of the Rad53 checkpoint kinase in the rrm3 mutant depends on the Mec3/Rad24 DNA damage sensors and results from activation of the Mec1/Rad9-dependent DNA damage response rather than the Mrc1-dependent replication stress response. Moreover, helicase double mutants accumulate Rad51-dependent Ddc2 foci, indicating the presence of recombination intermediates that are sensed by checkpoints. These findings demonstrate that different nonreplicative helicases function at the interface between replication and repair to maintain genome integrity.
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Affiliation(s)
- Kristina H. Schmidt
- *Ludwig Institute for Cancer Research and
- Division of Cell Biology, Microbiology, and Molecular Biology, Department of Biology, University of South Florida, Tampa, FL 33620
- To whom correspondence may be sent at the † address. E-mail:
| | - Richard D. Kolodner
- *Ludwig Institute for Cancer Research and
- Departments of Medicine and Cellular and Molecular Medicine and Cancer Center, University of California at San Diego, La Jolla, CA 92093; and
- To whom correspondence may be addressed. E-mail:
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Ebinger M, Bock T, Kandolf R, Sotlar K, Bültmann BD, Greil J. Standard mono- and dinucleotide repeats do not appear to be sensitive markers of microsatellite instability in the Ewing family of tumors. ACTA ACUST UNITED AC 2005; 157:189-90. [PMID: 15721646 DOI: 10.1016/j.cancergencyto.2004.08.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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