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Roos-Weil D, Nguyen-Khac F, Bernard OA. Chronic lymphocytic leukemia: Time to go past genomics? Am J Hematol 2016; 91:518-28. [PMID: 26800490 DOI: 10.1002/ajh.24301] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/11/2016] [Accepted: 01/12/2016] [Indexed: 12/20/2022]
Abstract
Recent advances in massively parallel sequencing technologies have provided a detailed picture of the mutational landscape in CLL and underscored the vast degree of interpatient and intratumor heterogeneities. These studies have led to the characterization of novel putative driver genes and recurrently affected biological pathways, and to the modeling of CLL clonal evolution. We herein review selected aspects including recent advances in the biology of CLL and present cellular and biological processes involved in the development of CLL and potentially other mature B-cell lymphoproliferative neoplasms.
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Affiliation(s)
- Damien Roos-Weil
- Institut National De La Santé Et De La Recherche Médicale (INSERM) U1170; Villejuif France
- Gustave Roussy, Villejuif, France
- Université Paris Saclay; France
- Equipe Labellisée Ligue Nationale Contre Le Cancer
| | - Florence Nguyen-Khac
- INSERM U1138; Paris France
- Université Pierre Et Marie Curie-Paris 6; France
- Service D'hématologie Biologique, Hôpital Pitié-Salpêtrière, APHP; Paris France
| | - Olivier A. Bernard
- Institut National De La Santé Et De La Recherche Médicale (INSERM) U1170; Villejuif France
- Gustave Roussy, Villejuif, France
- Université Paris Saclay; France
- Equipe Labellisée Ligue Nationale Contre Le Cancer
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303
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Karagianni P, Lambropoulos V, Stergidou D, Fryssira H, Chatziioannidis I, Spyridakis I. Recurrent giant cell fibroblastoma: Malignancy predisposition in Kabuki syndrome revisited. Am J Med Genet A 2016; 170A:1333-8. [PMID: 26898171 DOI: 10.1002/ajmg.a.37584] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 01/25/2016] [Indexed: 11/07/2022]
Abstract
Kabuki syndrome is a genetic condition characterized by distinctive facial phenotype, mental retardation, and internal organ malformations. Mutations of the epigenetic genes KMT2D and KDM6A cause dysregulation of certain developmental genes and account for the multiple congenital anomalies of the syndrome. Eight cases of malignancies have been reported in young patients with Kabuki syndrome although a causative association to the syndrome has not been established. We report a case of a 12-year-old girl with Kabuki syndrome who developed a tumor on the right side of her neck. A relapsing tumor 19 months after initial excision, proved to be giant cell fibroblastoma. Τhis is the first report of giant cell fibroblastoma -a rare tumor of childhood- in a patient with Kabuki syndrome.
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Affiliation(s)
- Paraskevi Karagianni
- Department of Neonatology and B' NICU (Neonatal Intensive Care Unit), Aristotle University of Thessaloniki, General Hospital Papageorgiou, Thessaloniki, Greece
| | - Vassilios Lambropoulos
- Second Department of Pediatric Surgery, Aristotle University of Thessaloniki, General Hospital Papageorgiou, Thessaloniki, Greece
| | - Dorothea Stergidou
- Department of Neonatology and B' NICU (Neonatal Intensive Care Unit), Aristotle University of Thessaloniki, General Hospital Papageorgiou, Thessaloniki, Greece
| | - Helena Fryssira
- Department of Medical Genetics, University of Athens School of Medicine, "Aghia Sophia" Children's Hospital, Goudi, Athens, Greece
| | - Ilias Chatziioannidis
- Department of Neonatology and B' NICU (Neonatal Intensive Care Unit), Aristotle University of Thessaloniki, General Hospital Papageorgiou, Thessaloniki, Greece
| | - Ioannis Spyridakis
- Second Department of Pediatric Surgery, Aristotle University of Thessaloniki, General Hospital Papageorgiou, Thessaloniki, Greece
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304
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Dubois S, Jardin F. The role of next-generation sequencing in understanding the genomic basis of diffuse large B cell lymphoma and advancing targeted therapies. Expert Rev Hematol 2016; 9:255-69. [PMID: 26652775 DOI: 10.1586/17474086.2016.1130616] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Next Generation Sequencing (NGS) has redefined the genetic landscape of Diffuse Large B-Cell Lymphoma (DLBCL) by identifying recurrent somatic mutations. Importantly, in some cases these mutations impact potentially actionable targets, thus affording novel personalized therapy opportunities. At the forefront of today's precision therapy era, how to best incorporate NGS into daily clinical practice is of primordial concern, in order to tailor patient's treatment regimens according to their individual mutational profiles. With the advent of cell-free DNA sequencing, which provides a sensitive and less invasive means of monitoring DLBCL patients, the clinical feasibility of NGS has been greatly improved. This article reviews the current landscape of DLBCL mutations, as well as the targeted therapies developed to counter their effects, and discusses how best to utilize NGS data for treatment decision-making.
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Affiliation(s)
- Sydney Dubois
- a Inserm U918, Centre Henri Becquerel , Université de Rouen, IRIB , Rouen , France
| | - Fabrice Jardin
- a Inserm U918, Centre Henri Becquerel , Université de Rouen, IRIB , Rouen , France.,b Department of Hematology , Centre Henri Becquerel , Rouen , France
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305
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Starnes LM, Su D, Pikkupeura LM, Weinert BT, Santos MA, Mund A, Soria R, Cho YW, Pozdnyakova I, Kubec Højfeldt M, Vala A, Yang W, López-Méndez B, Lee JE, Peng W, Yuan J, Ge K, Montoya G, Nussenzweig A, Choudhary C, Daniel JA. A PTIP-PA1 subcomplex promotes transcription for IgH class switching independently from the associated MLL3/MLL4 methyltransferase complex. Genes Dev 2016; 30:149-63. [PMID: 26744420 PMCID: PMC4719306 DOI: 10.1101/gad.268797.115] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 12/04/2015] [Indexed: 01/13/2023]
Abstract
Transcription at the immunoglobulin heavy chain (Igh) locus targets class switch recombination (CSR)-associated DNA damage and is promoted by the BRCT domain-containing PTIP protein. Starnes et al. found that PTIP functions in transcription and CSR separately from its association with the MLL3/MLL4 complex and from its localization to sites of DNA damage. Class switch recombination (CSR) diversifies antibodies for productive immune responses while maintaining stability of the B-cell genome. Transcription at the immunoglobulin heavy chain (Igh) locus targets CSR-associated DNA damage and is promoted by the BRCT domain-containing PTIP (Pax transactivation domain-interacting protein). Although PTIP is a unique component of the mixed-lineage leukemia 3 (MLL3)/MLL4 chromatin-modifying complex, the mechanisms for how PTIP promotes transcription remain unclear. Here we dissected the minimal structural requirements of PTIP and its different protein complexes using quantitative proteomics in primary lymphocytes. We found that PTIP functions in transcription and CSR separately from its association with the MLL3/MLL4 complex and from its localization to sites of DNA damage. We identified a tandem BRCT domain of PTIP that is sufficient for CSR and identified PA1 as its main functional protein partner. Collectively, we provide genetic and biochemical evidence that a PTIP–PA1 subcomplex functions independently from the MLL3/MLL4 complex to mediate transcription during CSR. These results further our understanding of how multifunctional chromatin-modifying complexes are organized by subcomplexes that harbor unique and distinct activities.
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Affiliation(s)
- Linda M Starnes
- Chromatin Structure and Function Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Dan Su
- Chromatin Structure and Function Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Laura M Pikkupeura
- Chromatin Structure and Function Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Brian T Weinert
- Proteomics and Cell Signaling Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Margarida A Santos
- Laboratory of Genome Integrity, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Andreas Mund
- Chromatin Structure and Function Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Rebeca Soria
- Chromatin Structure and Function Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Young-Wook Cho
- Adipocyte Biology and Gene Regulation Section, Laboratory of Endocrinology and Receptor Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Irina Pozdnyakova
- Protein Production and Characterization Platform, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Martina Kubec Højfeldt
- Chromatin Structure and Function Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Andrea Vala
- Protein Production and Characterization Platform, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Wenjing Yang
- Department of Physics, The George Washington University, Washington, DC 20052, USA
| | - Blanca López-Méndez
- Protein Production and Characterization Platform, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Ji-Eun Lee
- Adipocyte Biology and Gene Regulation Section, Laboratory of Endocrinology and Receptor Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Weiqun Peng
- Department of Physics, The George Washington University, Washington, DC 20052, USA
| | - Joan Yuan
- Developmental Immunology Group, Division of Molecular Hematology, Lund Stem Cell Center, Faculty of Medicine, Lund University, Lund 22184, Sweden
| | - Kai Ge
- Adipocyte Biology and Gene Regulation Section, Laboratory of Endocrinology and Receptor Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Guillermo Montoya
- Protein Production and Characterization Platform, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark; Macromolecular Crystallography Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - André Nussenzweig
- Laboratory of Genome Integrity, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Chunaram Choudhary
- Proteomics and Cell Signaling Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Jeremy A Daniel
- Chromatin Structure and Function Group, The Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
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