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Valent P, Akin C, Arock M, Gleixner KV, Greinix H, Hermine O, Horny HP, Ivanov D, Orfao A, Rabitsch W, Reiter A, Schulenburg A, Sotlar K, Sperr WR, Ustun C. Antibody-Based and Cell Therapies for Advanced Mastocytosis: Established and Novel Concepts. Int J Mol Sci 2023; 24:15125. [PMID: 37894806 PMCID: PMC10607143 DOI: 10.3390/ijms242015125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/03/2023] [Accepted: 10/03/2023] [Indexed: 10/29/2023] Open
Abstract
Advanced systemic mastocytosis (SM) is a heterogeneous group of myeloid neoplasms characterized by an uncontrolled expansion of mast cells (MC) in one or more internal organs, SM-induced tissue damage, and poor prognosis. Advanced SM can be categorized into aggressive SM (ASM), MC leukemia (MCL), and SM with an associated hematologic neoplasm (SM-AHN). In a vast majority of all patients, neoplastic cells display a KIT mutation, mostly D816V and rarely other KIT variants. Additional mutations in other target genes, such as SRSF2, ASXL1, or RUNX1, may also be identified, especially when an AHN is present. During the past 10 years, improved treatment approaches have led to a better quality of life and survival in patients with advanced SM. However, despite the availability of novel potent inhibitors of KIT D816V, not all patients enter remission and others relapse, often with a multi-mutated and sometimes KIT D816V-negative disease exhibiting multi-drug resistance. For these patients, (poly)chemotherapy, antibody-based therapies, and allogeneic hematopoietic stem cell transplantation may be viable treatment alternatives. In this article, we discuss treatment options for patients with drug-resistant advanced SM, including novel KIT-targeting drugs, antibody-based drugs, and stem cell-eradicating therapies.
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Affiliation(s)
- Peter Valent
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090 Vienna, Austria
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090 Vienna, Austria
| | - Cem Akin
- Division of Allergy and Clinical Immunology, University of Michigan, Ann Arbor, MI 48106, USA
| | - Michel Arock
- Department of Hematological Biology, Pitié-Salpêtrière Hospital, Sorbonne University, 75013 Paris, France
| | - Karoline V. Gleixner
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090 Vienna, Austria
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090 Vienna, Austria
| | - Hildegard Greinix
- Division of Hematology, Medical University of Graz, 8010 Graz, Austria
| | - Olivier Hermine
- Service d’Hématologie, Imagine Institute Université de Paris, INSERM U1163, Centre National de Référence des Mastocytoses, Hôpital Necker, Assistance Publique Hôpitaux de Paris, 75015 Paris, France
| | - Hans-Peter Horny
- Institute of Pathology, Ludwig-Maximilians University, 80539 Munich, Germany
| | - Daniel Ivanov
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090 Vienna, Austria
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090 Vienna, Austria
| | - Alberto Orfao
- Servicio Central de Citometria, Centro de Investigacion del Cancer (IBMCC; CSIC/USAL) Instituto Biosanitario de Salamanca (IBSAL), CIBERONC and Department of Medicine, University of Salamanca, 37007 Salamanca, Spain
| | - Werner Rabitsch
- Department of Internal Medicine I, Stem Cell Transplantation Unit, Medical University of Vienna, 1090 Vienna, Austria
| | - Andreas Reiter
- Department of Hematology and Oncology, University Hospital Mannheim, 68135 Mannheim, Germany
| | - Axel Schulenburg
- Department of Internal Medicine I, Stem Cell Transplantation Unit, Medical University of Vienna, 1090 Vienna, Austria
| | - Karl Sotlar
- Institute of Pathology, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Wolfgang R. Sperr
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090 Vienna, Austria
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090 Vienna, Austria
| | - Celalettin Ustun
- Department of Medicine, Division of Hematology, Oncology, and Cell Therapy, Coleman Foundation Blood and Marrow Transplant Center at Rush University Medical Center, Chicago, IL 60612, USA
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Systemic Mastocytosis and Other Entities Involving Mast Cells: A Practical Review and Update. Cancers (Basel) 2022; 14:cancers14143474. [PMID: 35884535 PMCID: PMC9322501 DOI: 10.3390/cancers14143474] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/11/2022] [Accepted: 07/13/2022] [Indexed: 02/05/2023] Open
Abstract
Evidence in the recent literature suggests that the presentation spectrum of mast cell neoplasms is broad. In this article, we elaborate on recent data pertaining to minor diagnostic criteria of systemic mastocytosis (SM), including sensitive testing methods for detection of activating mutations in the KIT gene or its variants, and adjusted serum tryptase levels in cases with hereditary α-tryptasemia. We also summarize entities that require differential diagnosis, such as the recently reclassified SM subtype named bone marrow mastocytosis, mast cell leukemia (an SM subtype that can be acute or chronic); the rare morphological variant of all SM subtypes known as well-differentiated systemic mastocytosis; the extremely rare myelomastocytic leukemia and its differentiating features from mast cell leukemia; and mast cell activation syndrome. In addition, we provide a concise clinical update of the latest adjusted risk stratification model incorporating genomic data to define prognosis in SM and new treatments that were approved for advanced SM (midostaurin, avapritinib).
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González-López O, Muñoz-González JI, Orfao A, Álvarez-Twose I, García-Montero AC. Comprehensive Analysis of Acquired Genetic Variants and Their Prognostic Impact in Systemic Mastocytosis. Cancers (Basel) 2022; 14:cancers14102487. [PMID: 35626091 PMCID: PMC9139197 DOI: 10.3390/cancers14102487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 05/14/2022] [Accepted: 05/15/2022] [Indexed: 01/27/2023] Open
Abstract
Systemic mastocytosis (SM) is a rare clonal haematopoietic stem cell disease in which activating KIT mutations (most commonly KIT D816V) are present in virtually every (>90%) adult patient at similar frequencies among non-advanced and advanced forms of SM. The KIT D816V mutation is considered the most common pathogenic driver of SM. Acquisition of this mutation early during haematopoiesis may cause multilineage involvement of haematopoiesis by KIT D816V, which has been associated with higher tumour burden and additional mutations in other genes, leading to an increased rate of transformation to advanced SM. Thus, among other mutations, alterations in around 30 genes that are also frequently mutated in other myeloid neoplasms have been reported in SM cases. From these genes, 12 (i.e., ASXL1, CBL, DNMT3A, EZH2, JAK2, KRAS, NRAS, SF3B1, RUNX1, SF3B1, SRSF2, TET2) have been recurrently reported to be mutated in SM. Because of all the above, assessment of multilineage involvement of haematopoiesis by the KIT D816V mutation, in the setting of multi-mutated haematopoiesis as revealed by a limited panel of genes (i.e., ASXL1, CBL, DNMT3A, EZH2, NRAS, RUNX1 and SRSF2) and associated with a poorer patient outcome, has become of great help to identify SM patients at higher risk of disease progression and/or poor survival who could benefit from closer follow-up and eventually also early cytoreductive treatment.
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Affiliation(s)
- Oscar González-López
- Cancer Research Center (IBMCC, USAL/CSIC), Department of Medicine, Universidad de Salamanca, Biomedical Research Institute of Salamanca and Spanish Network on Mastocytosis (REMA), 37007 Salamanca, Spain; (O.G.-L.); (J.I.M.-G.); (A.O.)
- Centro de Investigación Biomédica en Red Cáncer (CIBERONC), 28029 Madrid, Spain;
| | - Javier I. Muñoz-González
- Cancer Research Center (IBMCC, USAL/CSIC), Department of Medicine, Universidad de Salamanca, Biomedical Research Institute of Salamanca and Spanish Network on Mastocytosis (REMA), 37007 Salamanca, Spain; (O.G.-L.); (J.I.M.-G.); (A.O.)
- Centro de Investigación Biomédica en Red Cáncer (CIBERONC), 28029 Madrid, Spain;
| | - Alberto Orfao
- Cancer Research Center (IBMCC, USAL/CSIC), Department of Medicine, Universidad de Salamanca, Biomedical Research Institute of Salamanca and Spanish Network on Mastocytosis (REMA), 37007 Salamanca, Spain; (O.G.-L.); (J.I.M.-G.); (A.O.)
- Centro de Investigación Biomédica en Red Cáncer (CIBERONC), 28029 Madrid, Spain;
| | - Iván Álvarez-Twose
- Centro de Investigación Biomédica en Red Cáncer (CIBERONC), 28029 Madrid, Spain;
- Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast, Virgen del Valle Hospital) and REMA, 45071 Toledo, Spain
| | - Andrés C. García-Montero
- Cancer Research Center (IBMCC, USAL/CSIC), Department of Medicine, Universidad de Salamanca, Biomedical Research Institute of Salamanca and Spanish Network on Mastocytosis (REMA), 37007 Salamanca, Spain; (O.G.-L.); (J.I.M.-G.); (A.O.)
- Centro de Investigación Biomédica en Red Cáncer (CIBERONC), 28029 Madrid, Spain;
- Correspondence:
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Zimmermann N, Abonia JP, Dreskin SC, Akin C, Bolton S, Happel CS, Geller M, Larenas-Linnemann D, Nanda A, Peterson K, Wasan A, Wechsler J, Zhang S, Bernstein JA. Developing a standardized approach for assessing mast cells and eosinophils on tissue biopsies: A Work Group Report of the AAAAI Allergic Skin Diseases Committee. J Allergy Clin Immunol 2021; 148:964-983. [PMID: 34384610 DOI: 10.1016/j.jaci.2021.06.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 06/29/2021] [Accepted: 06/30/2021] [Indexed: 10/20/2022]
Abstract
Mast cells and eosinophils are commonly found, expectedly or unexpectedly, in human tissue biopsies. Although the clinical significance of their presence, absence, quantity, and quality continues to be investigated in homeostasis and disease, there are currently gaps in knowledge related to what constitutes quantitatively relevant increases in mast cell and eosinophil number in tissue specimens for several clinical conditions. Diagnostically relevant thresholds of mast cell and eosinophil numbers have been proposed and generally accepted by the medical community for a few conditions, such as systemic mastocytosis and eosinophilic esophagitis. However, for other mast cell- and eosinophil-associated disorders, broad discrepancies remain regarding diagnostic thresholds and how samples are processed, routinely and/or specially stained, and interpreted and/or reported by pathologists. These discrepancies can obfuscate or delay a patient's correct diagnosis. Therefore, a work group was assembled to review the literature and develop a standardized consensus for assessing the presence of mast cells and eosinophils for a spectrum of clinical conditions, including systemic mastocytosis and cutaneous mastocytosis, mast cell activation syndrome, eosinophilic esophagitis, eosinophilic gastritis/enteritis, and hypereosinophilia/hypereosinophilic syndrome. The intent of this work group is to build a consensus among pathology, allergy, dermatology, hematology/oncology, and gastroenterology stakeholders for qualitatively and quantitatively assessing mast cells and eosinophils in skin, gastrointestinal, and bone marrow pathologic specimens for the benefit of clinical practice and patients.
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Affiliation(s)
- Nives Zimmermann
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio; Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - J Pablo Abonia
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio; Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio
| | - Stephen C Dreskin
- Division of Allergy and Immunology, Department of Internal Medicine, University of Colorado, Aurora, Colo
| | - Cem Akin
- Division of Allergy and Immunology, Department of Internal Medicine, University of Michigan, Ann Arbor, Mich
| | - Scott Bolton
- Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio; Division of Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Corinne S Happel
- Division of Allergy and Immunology, Department of Internal Medicine, John Hopkins School of Medicine, Baltimore, Md
| | - Mario Geller
- Department of Medicine, the Academy of Medicine of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Anil Nanda
- Asthma and Allergy Center, Lewisville, Tex; Asthma and Allergy Center, Flower Mound, Tex; Division of Allergy and Immunology, University of Texas Southwestern Medical Center, Dallas, Tex
| | - Kathryn Peterson
- Division of Gastroenterology, Department of Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Anita Wasan
- Division of Gastroenterology, Hepatology, and Nutrition, Allergy and Asthma Center, McLean, Va
| | - Joshua Wechsler
- Division of Allergy and Immunology, Department of Pediatrics, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Ill
| | - Simin Zhang
- Allergy Section, Division of Immunology, Department of Internal Medicine, College of Medicine, University of Cincinnati, Cincinnati, Ohio
| | - Jonathan A Bernstein
- Allergy Section, Division of Immunology, Department of Internal Medicine, College of Medicine, University of Cincinnati, Cincinnati, Ohio.
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Zanelli M, Pizzi M, Sanguedolce F, Zizzo M, Palicelli A, Soriano A, Bisagni A, Martino G, Caprera C, Moretti M, Masia F, De Marco L, Froio E, Foroni M, Bernardelli G, Alvarez de Celis MI, Giunta A, Merli F, Ascani S. Gastrointestinal Manifestations in Systemic Mastocytosis: The Need of a Multidisciplinary Approach. Cancers (Basel) 2021; 13:3316. [PMID: 34282774 PMCID: PMC8269078 DOI: 10.3390/cancers13133316] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/18/2021] [Accepted: 06/27/2021] [Indexed: 12/16/2022] Open
Abstract
Mastocytosis represents a heterogeneous group of neoplastic mast cell disorders. The basic classification into a skin-limited disease and a systemic form with multi-organ involvement remains valid. Systemic mastocytosis is a disease often hard to diagnose, characterized by different symptoms originating from either the release of mast cell mediators or organ damage due to mast cell infiltration. Gastrointestinal symptoms represent one of the major causes of morbidity, being present in 60-80% of patients. A high index of suspicion by clinicians and pathologists is required to reach the diagnosis. Gastrointestinal mastocytosis can be a challenging diagnosis, as symptoms simulate other more common gastrointestinal diseases. The endoscopic appearance is generally unremarkable or nonspecific and gastrointestinal mast cell infiltration can be focal and subtle, requiring an adequate sampling with multiple biopsies by the endoscopists. Special stains, such as CD117, tryptase, and CD25, should be performed in order not to miss the gastrointestinal mast cell infiltrate. A proper patient's workup requires a multidisciplinary approach including gastroenterologists, endoscopists, hematologists, oncologists, and pathologists. The aim of this review is to analyze the clinicopathological features of gastrointestinal involvement in systemic mastocytosis, focusing on the relevance of a multidisciplinary approach.
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Affiliation(s)
- Magda Zanelli
- Pathology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (A.P.); (A.B.); (L.D.M.); (E.F.); (M.F.); (G.B.)
| | - Marco Pizzi
- General Pathology and Cytopathology Unit, Department of Medicine-DMED, University of Padova, 35121 Padova, Italy;
| | | | - Maurizio Zizzo
- Surgical Oncology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (M.Z.); (A.G.)
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | - Andrea Palicelli
- Pathology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (A.P.); (A.B.); (L.D.M.); (E.F.); (M.F.); (G.B.)
| | - Alessandra Soriano
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA;
- Gastroenterology Division, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy
| | - Alessandra Bisagni
- Pathology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (A.P.); (A.B.); (L.D.M.); (E.F.); (M.F.); (G.B.)
| | - Giovanni Martino
- Pathology Unit, Azienda Ospedaliera Santa Maria di Terni, University of Perugia, 05100 Terni, Italy; (G.M.); (C.C.); (S.A.)
| | - Cecilia Caprera
- Pathology Unit, Azienda Ospedaliera Santa Maria di Terni, University of Perugia, 05100 Terni, Italy; (G.M.); (C.C.); (S.A.)
| | - Marina Moretti
- OncoHematology Unit, Azienda Ospedaliera Santa Maria di Terni, University of Perugia, 05100 Terni, Italy; (M.M.); (F.M.)
| | - Francesco Masia
- OncoHematology Unit, Azienda Ospedaliera Santa Maria di Terni, University of Perugia, 05100 Terni, Italy; (M.M.); (F.M.)
| | - Loredana De Marco
- Pathology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (A.P.); (A.B.); (L.D.M.); (E.F.); (M.F.); (G.B.)
| | - Elisabetta Froio
- Pathology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (A.P.); (A.B.); (L.D.M.); (E.F.); (M.F.); (G.B.)
| | - Moira Foroni
- Pathology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (A.P.); (A.B.); (L.D.M.); (E.F.); (M.F.); (G.B.)
| | - Giuditta Bernardelli
- Pathology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (A.P.); (A.B.); (L.D.M.); (E.F.); (M.F.); (G.B.)
| | | | - Alessandro Giunta
- Surgical Oncology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (M.Z.); (A.G.)
| | - Francesco Merli
- Hematology Unit, Azienda USL-IRCCS di Reggio Emilia, 42123 Reggio Emilia, Italy; (M.I.A.d.C.); (F.M.)
| | - Stefano Ascani
- Pathology Unit, Azienda Ospedaliera Santa Maria di Terni, University of Perugia, 05100 Terni, Italy; (G.M.); (C.C.); (S.A.)
- Haematopathology Unit, CREO, Azienda Ospedaliera di Perugia, University of Perugia, 06129 Perugia, Italy
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Systemic Mastocytosis: Molecular Landscape and Implications for Treatment. Mediterr J Hematol Infect Dis 2021; 13:e2021046. [PMID: 34276915 PMCID: PMC8265368 DOI: 10.4084/mjhid.2021.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 06/11/2021] [Indexed: 12/04/2022] Open
Abstract
Over the past decade, we have witnessed significant advances in the molecular characterization of systemic mastocytosis (SM). This has provided important information for a better understanding of the pathogenesis of the disease but has also practically impacted the way we diagnose and manage it. Advances in molecular testing have run in parallel with advances in therapeutic targeting of constitutive active KIT, the major driver of the disease. Therefore, assessing the molecular landscape in each SM patient is essential for diagnosis, prognosis, treatment, and therapeutic efficacy monitoring. This is facilitated by the routine availability of novel technologies like digital PCR and NGS. This review aims to summarize the pathogenesis of the disease, discuss the value of molecular diagnostic testing and how it should be performed, and provide an overview of present and future therapeutic concepts based on fine molecular characterization of SM patients.
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Lange M, Hartmann K, Carter MC, Siebenhaar F, Alvarez-Twose I, Torrado I, Brockow K, Renke J, Irga-Jaworska N, Plata-Nazar K, Ługowska-Umer H, Czarny J, Belloni Fortina A, Caroppo F, Nowicki RJ, Nedoszytko B, Niedoszytko M, Valent P. Molecular Background, Clinical Features and Management of Pediatric Mastocytosis: Status 2021. Int J Mol Sci 2021; 22:2586. [PMID: 33806685 PMCID: PMC7961542 DOI: 10.3390/ijms22052586] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/24/2021] [Accepted: 02/27/2021] [Indexed: 12/12/2022] Open
Abstract
Pediatric mastocytosis is a heterogeneous disease characterized by accumulation of mast cells in the skin and less frequently in other organs. Somatic or germline mutations in the KIT proto-oncogene are detected in most patients. Cutaneous mastocytosis is the most common form of the disease in children. In the majority of cases, skin lesions regress spontaneously around puberty. However, in few patients, mastocytosis is not a self-limiting disease, but persists into adulthood and can show signs of systemic involvement, especially when skin lesions are small-sized and monomorphic. Children with mastocytosis often suffer from mast cell mediator-related symptoms. Severe hypersensitivity reactions can also occur, mostly in patients with extensive skin lesions and blistering. In a substantial number of these cases, the triggering factor of anaphylaxis remains unidentified. Management of pediatric mastocytosis is mainly based on strict avoidance of triggers, treatment with H1 and H2 histamine receptor blockers, and equipment of patients and their families with epinephrine auto-injectors for use in severe anaphylactic reactions. Advanced systemic mastocytosis occurs occasionally. All children with mastocytosis require follow-up examinations. A bone marrow investigation is performed when advanced systemic mastocytosis is suspected and has an impact on therapy or when cutaneous disease persists into adulthood.
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Affiliation(s)
- Magdalena Lange
- Department of Dermatology, Venereology and Allergology, Medical University of Gdańsk, 80-211 Gdańsk, Poland; (H.Ł.-U.); (J.C.); (R.J.N.); (B.N.)
| | - Karin Hartmann
- Division of Allergy, Department of Dermatology, University Hospital Basel and University of Basel, 4031 Basel, Switzerland;
- Department of Biomedicine, University Hospital Basel and University of Basel, 4031 Basel, Switzerland
| | - Melody C. Carter
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA;
| | - Frank Siebenhaar
- Dermatological Allergology, Department of Dermatology and Allergy, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, 10117 Berlin, Germany;
| | - Ivan Alvarez-Twose
- Instituto de Estudios de Mastocitosis de Castilla-La Mancha (CLMast)—Spanish Reference Center for Mastocytosis, Hospital Virgen del Valle—Complejo Hospitalario de Toledo, 45071 Toledo, Spain; (I.A.-T.); (I.T.)
| | - Inés Torrado
- Instituto de Estudios de Mastocitosis de Castilla-La Mancha (CLMast)—Spanish Reference Center for Mastocytosis, Hospital Virgen del Valle—Complejo Hospitalario de Toledo, 45071 Toledo, Spain; (I.A.-T.); (I.T.)
| | - Knut Brockow
- Department of Dermatology and Allergy Biederstein, School of Medicine, Technical University of Munich, 80802 Munich, Germany;
| | - Joanna Renke
- Department of Pediatrics, Hematology and Oncology, Medical University of Gdańsk, 80-211 Gdańsk, Poland; (J.R.); (N.I.-J.)
| | - Ninela Irga-Jaworska
- Department of Pediatrics, Hematology and Oncology, Medical University of Gdańsk, 80-211 Gdańsk, Poland; (J.R.); (N.I.-J.)
| | - Katarzyna Plata-Nazar
- Department of Pediatrics, Pediatric Gastroenterology, Allergology and Nutrition, Medical University of Gdańsk, 80-211 Gdańsk, Poland;
| | - Hanna Ługowska-Umer
- Department of Dermatology, Venereology and Allergology, Medical University of Gdańsk, 80-211 Gdańsk, Poland; (H.Ł.-U.); (J.C.); (R.J.N.); (B.N.)
| | - Justyna Czarny
- Department of Dermatology, Venereology and Allergology, Medical University of Gdańsk, 80-211 Gdańsk, Poland; (H.Ł.-U.); (J.C.); (R.J.N.); (B.N.)
| | - Anna Belloni Fortina
- Pediatric Dermatology Unit, Department of Medicine DIMED, University of Padua, 35128 Padua, Italy; (A.B.F.); (F.C.)
| | - Francesca Caroppo
- Pediatric Dermatology Unit, Department of Medicine DIMED, University of Padua, 35128 Padua, Italy; (A.B.F.); (F.C.)
| | - Roman J. Nowicki
- Department of Dermatology, Venereology and Allergology, Medical University of Gdańsk, 80-211 Gdańsk, Poland; (H.Ł.-U.); (J.C.); (R.J.N.); (B.N.)
| | - Bogusław Nedoszytko
- Department of Dermatology, Venereology and Allergology, Medical University of Gdańsk, 80-211 Gdańsk, Poland; (H.Ł.-U.); (J.C.); (R.J.N.); (B.N.)
| | - Marek Niedoszytko
- Department of Allergology, Medical University of Gdańsk, 80-211 Gdańsk, Poland;
| | - Peter Valent
- Division of Hematology and Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, 1090 Vienna, Austria;
- Ludwig Boltzmann Institute for Hematology and Hemostaseology, Medical University of Vienna, 1090 Vienna, Austria
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8
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Galura GM, Cherukuri SV, Hakim N, Gaur S, Orazi A. Acute aleukemic mast cell leukemia: Report of a case and review of the literature. Leuk Res Rep 2020; 14:100230. [PMID: 33318926 PMCID: PMC7725938 DOI: 10.1016/j.lrr.2020.100230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 11/22/2020] [Indexed: 12/11/2022] Open
Abstract
Mast Cell Leukemia (MCL) is the rarest form of systemic mastocytosis, a rare group of neoplastic disease that result from clonal proliferation of mast cells and their accumulation in one or more organ systems. The diagnosis of MCL is made by meeting the World Health Organization (WHO) 2017 criteria. MCL is further subclassified as leukemic or aleukemic based on presence or absence of circulating mast cells in the peripheral blood and acute versus chronic based on presence or absence of findings indicative of impaired organ function due to mast cell infiltration. A 64-year-old Hispanic male presented with myalgia, diarrhea, urticarial rash, back pain, and fulminant disseminated intravascular coagulation. Bone marrow examination, supplemented by immunohistochemistry results, fulfilled the WHO criteria for the diagnosis of MCL. To the best of our knowledge, this is the first documented case of aleukemic acute MCL in a Hispanic patient.
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Affiliation(s)
- Gian M. Galura
- Department of Internal Medicine, Texas Tech University Health Sciences Center El Paso, Texas, United States
| | - Sundar V. Cherukuri
- Department of Internal Medicine, Texas Tech University Health Sciences Center El Paso, Texas, United States
| | - Nawar Hakim
- Department of Pathology, Texas Tech University Health Sciences Center El Paso, Texas, United States
| | - Sumit Gaur
- Department of Internal Medicine, Texas Tech University Health Sciences Center El Paso, Texas, United States
| | - Attilio Orazi
- Department of Pathology, Texas Tech University Health Sciences Center El Paso, Texas, United States
- Corresponding author.
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9
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Manthri S, Costello PN, Krishnan K. Chronic mast cell leukaemia with exon 9 KIT mutation A502_Y503dup: a rare imatinib responsive variant. BMJ Case Rep 2020; 13:13/8/e236447. [PMID: 32843387 DOI: 10.1136/bcr-2020-236447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Sukesh Manthri
- Internal Medicine, Division of Medical Oncology, East Tennessee State University, Johnson City, Tennessee, USA
| | - Patrick N Costello
- Watauga Pathology, East Tennessee State University, Johnson City, Tennessee, USA
| | - Koyamangalath Krishnan
- Internal Medicine, Division of Medical Oncology, East Tennessee State University, Johnson City, Tennessee, USA
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10
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Piris-Villaespesa M, Alvarez-Twose I. Systemic Mastocytosis: Following the Tyrosine Kinase Inhibition Roadmap. Front Pharmacol 2020; 11:443. [PMID: 32346366 PMCID: PMC7171446 DOI: 10.3389/fphar.2020.00443] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 03/20/2020] [Indexed: 12/16/2022] Open
Abstract
Systemic mastocytosis is a rare and heterogeneous disease characterized by mast cell proliferation and activation. KIT is a transmembrane tyrosine kinase which plays a key role in mast cell growth, differentiation and survival. After interaction with its ligand, the stem cell factor, KIT dimerizes activating downstream pathways involving multiple tyrosine kinases (PI3K, JAK/STAT, RAS/ERK). Activating mutations in KIT are detected in most cases of systemic mastocytosis, being the most common KIT D816V. Therefore, since the emergence of tyrosine kinase inhibitors, KIT inhibition has been an attractive approach when facing mastocytosis treatment. Initial reports showed that only the rare KIT D816V negative cases were responsive to tyrosine kinase inhibitors. However, the development of new tyrosine kinase inhibitors such as midostaurin or avapritinib with activity against mast cells carrying the D816V KIT mutation, has changed the landscape of this disease.
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Affiliation(s)
- Miguel Piris-Villaespesa
- Servicio de Hematología y Hemoterapia and IRYCIS, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Ivan Alvarez-Twose
- Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast) and CIBERONC, Hospital Virgen del Valle, Toledo, Spain
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11
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Laforgia M, Calabrò C, Scattone A, Laface C, Porcelli M, Gadaleta CD, Nardulli P, Ranieri G. Pharmacotherapy in Mast Cell Leukemia. Expert Opin Pharmacother 2020; 21:1059-1069. [PMID: 32208985 DOI: 10.1080/14656566.2020.1744566] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
INTRODUCTION Mast cell leukemia (MCL) is one of the most aggressive forms of Systemic Mastocytosis (SM), a complex family of rare diseases, for which standard therapies are very few. MCL represents only <1% cases of SM and this is the reason why there are no specific clinical trials to better explore this disease. As a consequence, MCL is treated and grouped within other forms of SM, being all KIT-driven diseases; however, its KIT dysregulation leads to uncontrolled activation of mast cells (MCs), which correlates with forms of myeloid acute leukemia (AML). AREAS COVERED Different therapeutic approaches can be followed in the treatment of MCL. The authors look at both symptomatic therapies along with other approaches including targeted therapy. Further, the authors provide their expert opinion. EXPERT OPINION In the scenario of mast cell leukemia treatment, the key approach to achieve clinical results is, more than other similar pathologies, personalizing the therapy. It could be interesting or desirable to introduce for instance KIT mutant forms as minor criteria for the diagnosis of advanced SM, considering the small patient population with MCL and the relatively large panel of activating mutations for KIT and other important proteins involved in MCs' regulation.
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Affiliation(s)
- Mariarita Laforgia
- S.C. Farmacia e U.Ma.C.A, IRCCS Istituto Tumori Giovanni Paolo II , Bari, Italy
| | - Concetta Calabrò
- S.C. Farmacia e U.Ma.C.A, IRCCS Istituto Tumori Giovanni Paolo II , Bari, Italy
| | - Anna Scattone
- Anatomo-Pathology Department, IRCCS Istituto Tumori "Giovanni Paolo II" , Bari, Italy
| | - Carmelo Laface
- Department of Interventional Radiology and Integrated Medical Oncology, IRCCS Istituto Tumori "Giovanni Paolo II" , Bari, Italy
| | - Mariangela Porcelli
- Department of Interventional Radiology and Integrated Medical Oncology, IRCCS Istituto Tumori "Giovanni Paolo II" , Bari, Italy
| | - Cosmo Damiano Gadaleta
- Department of Interventional Radiology and Integrated Medical Oncology, IRCCS Istituto Tumori "Giovanni Paolo II" , Bari, Italy
| | - Patrizia Nardulli
- S.C. Farmacia e U.Ma.C.A, IRCCS Istituto Tumori Giovanni Paolo II , Bari, Italy
| | - Girolamo Ranieri
- Department of Interventional Radiology and Integrated Medical Oncology, IRCCS Istituto Tumori "Giovanni Paolo II" , Bari, Italy
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12
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Brown TJ, Patel PA, Oliver D, Churchill H, Monaghan SA, Collins RH. Next-Generation Sequencing Directs Therapy and Delineates a Clonal Relationship in Mast Cell Sarcoma and Acute Myeloid Leukemia. JCO Precis Oncol 2019; 3:1-6. [DOI: 10.1200/po.18.00291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | - Prapti A. Patel
- The University of Texas Southwestern Medical Center, Dallas, TX
| | - Dwight Oliver
- The University of Texas Southwestern Medical Center, Dallas, TX
| | - Hywyn Churchill
- The University of Texas Southwestern Medical Center, Dallas, TX
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13
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Eisenwort G, Sadovnik I, Schwaab J, Jawhar M, Keller A, Stefanzl G, Berger D, Blatt K, Hoermann G, Bilban M, Willmann M, Winding C, Sperr WR, Arock M, Rülicke T, Reiter A, Valent P. Identification of a leukemia-initiating stem cell in human mast cell leukemia. Leukemia 2019; 33:2673-2684. [PMID: 30953030 PMCID: PMC6839966 DOI: 10.1038/s41375-019-0460-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 03/17/2019] [Accepted: 03/18/2019] [Indexed: 12/23/2022]
Abstract
Mast cell leukemia (MCL) is a highly fatal malignancy characterized by devastating expansion of immature mast cells in various organs. Although considered a stem cell disease, little is known about MCL-propagating neoplastic stem cells. We here describe that leukemic stem cells (LSCs) in MCL reside within a CD34+/CD38− fraction of the clone. Whereas highly purified CD34+/CD38− cells engrafted NSGhSCF mice with fully manifesting MCL, no MCL was produced by CD34+/CD38+ progenitors or the bulk of KIT+/CD34− mast cells. CD34+/CD38− MCL cells invariably expressed CD13 and CD133, and often also IL-1RAP, but did not express CD25, CD26 or CLL-1. CD34+/CD38− MCL cells also displayed several surface targets, including CD33, which was homogenously expressed on MCL LSC in all cases, as well as the D816V mutant form of KIT. Whereas CD34+/CD38− cells were resistant against single drugs, exposure to combinations of CD33-targeting and KIT-targeting drugs resulted in LSC-depletion and markedly reduced engraftment in NSGhSCF mice. Together, MCL LSCs are CD34+/CD38− cells that express distinct profiles of markers and target antigens. Characterization of MCL LSCs should facilitate their purification and should support the development of LSC-eradicating curative treatment approaches in this fatal type of leukemia.
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Affiliation(s)
- Gregor Eisenwort
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria
| | - Irina Sadovnik
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria
| | - Juliana Schwaab
- Department of Hematology and Oncology, University Hospital Mannheim, Heidelberg University, 68167, Mannheim, Germany
| | - Mohamad Jawhar
- Department of Hematology and Oncology, University Hospital Mannheim, Heidelberg University, 68167, Mannheim, Germany
| | - Alexandra Keller
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria
| | - Gabriele Stefanzl
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria
| | - Daniela Berger
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria
| | - Katharina Blatt
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria
| | - Gregor Hoermann
- Department of Laboratory Medicine, Medical University of Vienna, 1090, Vienna, Austria
| | - Martin Bilban
- Department of Laboratory Medicine, Medical University of Vienna, 1090, Vienna, Austria
| | - Michael Willmann
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090, Vienna, Austria.,Department for Companion Animals & Horses, Clinic for Internal Medicine and Infectious Diseases, University of Veterinary Medicine Vienna, 1210, Vienna, Austria
| | - Christiana Winding
- Institute of Laboratory Animal Science, University of Veterinary Medicine Vienna, 1210, Vienna, Austria
| | - Wolfgang R Sperr
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090, Vienna, Austria.,Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria
| | - Michel Arock
- Cellular and Molecular Oncology, LBPA CNRS UMR8113, Ecole Normale Supérieure de Cachan, 94230, Cachan, France
| | - Thomas Rülicke
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090, Vienna, Austria.,Institute of Laboratory Animal Science, University of Veterinary Medicine Vienna, 1210, Vienna, Austria
| | - Andreas Reiter
- Department of Hematology and Oncology, University Hospital Mannheim, Heidelberg University, 68167, Mannheim, Germany
| | - Peter Valent
- Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, 1090, Vienna, Austria. .,Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, 1090, Vienna, Austria.
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14
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Budnik J, Milano MT. A registry-based analysis of survival outcomes in mast cell leukemia. Leuk Res 2019; 78:24-28. [DOI: 10.1016/j.leukres.2019.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/11/2019] [Accepted: 01/12/2019] [Indexed: 01/08/2023]
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15
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Hida T, Okura M, Kamiya T, Yamamoto M, Hori T, Uhara H. A case of childhood-onset cutaneous mastocytosis with loss of wild-type KIT allele. J Eur Acad Dermatol Venereol 2019; 33:e235-e237. [PMID: 30773694 DOI: 10.1111/jdv.15501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- T Hida
- Department of Dermatology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, 060-8543, Japan
| | - M Okura
- Department of Dermatology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, 060-8543, Japan
| | - T Kamiya
- Department of Dermatology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, 060-8543, Japan
| | - M Yamamoto
- Department of Pediatrics, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, 060-8543, Japan
| | - T Hori
- Department of Pediatrics, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, 060-8543, Japan
| | - H Uhara
- Department of Dermatology, Sapporo Medical University School of Medicine, South 1, West 16, Chuo-ku, Sapporo, 060-8543, Japan
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16
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Clinical Validation of KIT Inhibition in Advanced Systemic Mastocytosis. Curr Hematol Malig Rep 2018; 13:407-416. [DOI: 10.1007/s11899-018-0469-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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18
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KIT D816V Positive Acute Mast Cell Leukemia Associated with Normal Karyotype Acute Myeloid Leukemia. Case Rep Hematol 2018; 2018:3890361. [PMID: 29670776 PMCID: PMC5835284 DOI: 10.1155/2018/3890361] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 12/06/2017] [Indexed: 11/17/2022] Open
Abstract
Introduction Mast cell (MC) leukemia (MCL) is extremely rare. We present a case of MCL diagnosed concomitantly with acute myeloblastic leukemia (AML). Case Report A 41-year-old woman presented with asthenia, anorexia, fever, epigastralgia, and diarrhea. She had a maculopapular skin rash, hepatosplenomegaly, retroperitoneal adenopathies, pancytopenia, 6% blast cells (BC) and 20% MC in the peripheral blood, elevated lactate dehydrogenase, cholestasis, hypoalbuminemia, hypogammaglobulinemia, and increased serum tryptase (184 μg/L). The bone marrow (BM) smears showed 24% myeloblasts, 17% promyelocytes, and 16% abnormal toluidine blue positive MC, and flow cytometry revealed 12% myeloid BC, 34% aberrant promyelocytes, a maturation blockage at the myeloblast/promyelocyte level, and 16% abnormal CD2−CD25+ MC. The BM karyotype was normal, and the KIT D816V mutation was positive in BM cells. The diagnosis of MCL associated with AML was assumed. The patient received corticosteroids, disodium cromoglycate, cladribine, idarubicin and cytosine arabinoside, high-dose cytosine arabinoside, and hematopoietic stem cell transplantation (HSCT). The outcome was favorable, with complete hematological remission two years after diagnosis and one year after HSCT. Conclusions This case emphasizes the need of an exhaustive laboratory evaluation for the concomitant diagnosis of MCL and AML, and the therapeutic options.
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19
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Scherber RM, Borate U. How we diagnose and treat systemic mastocytosis in adults. Br J Haematol 2017; 180:11-23. [DOI: 10.1111/bjh.14967] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Robyn M. Scherber
- Department of Hematology and Oncology; Oregon Health and Science University; Portland OR USA
- Department of Hematology and Oncology; Mayo Clinic; Scottsdale AZ USA
| | - Uma Borate
- Department of Hematology and Oncology; Oregon Health and Science University; Portland OR USA
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20
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Gotlib J. Tyrosine Kinase Inhibitors in the Treatment of Eosinophilic Neoplasms and Systemic Mastocytosis. Hematol Oncol Clin North Am 2017; 31:643-661. [PMID: 28673393 DOI: 10.1016/j.hoc.2017.04.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The World Health Organization's semimolecular classification of eosinophilias emphasizes neoplasms driven by fusion tyrosine kinases. More than 80% of patients with systemic mastocytosis carry the KIT D816V mutation, the primary driver of disease pathogenesis. Genetic annotation of these diseases is critical and affords opportunities for targeted therapy. This article discusses our understanding of the mutated tyrosine kinome of eosinophilic neoplasms and systemic mast cell disease, and the successes and limitations of available therapies. Use of tyrosine kinase inhibitors as a bridge to hematopoietic stem cell transplantation, and development of more selective and potent tyrosine kinase inhibitors is also highlighted.
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Affiliation(s)
- Jason Gotlib
- Division of Hematology, Stanford Cancer Institute/Stanford University School of Medicine, 875 Blake Wilbur Drive, Room 2324, Stanford, CA 94305-5821, USA.
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21
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Jawhar M, Schwaab J, Meggendorfer M, Naumann N, Horny HP, Sotlar K, Haferlach T, Schmitt K, Fabarius A, Valent P, Hofmann WK, Cross NCP, Metzgeroth G, Reiter A. The clinical and molecular diversity of mast cell leukemia with or without associated hematologic neoplasm. Haematologica 2017; 102:1035-1043. [PMID: 28255023 PMCID: PMC5451335 DOI: 10.3324/haematol.2017.163964] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 02/28/2017] [Indexed: 12/19/2022] Open
Abstract
Mast cell leukemia is a rare variant of advanced systemic mastocytosis characterized by at least 20% of mast cells in a bone marrow smear. We evaluated clinical and molecular characteristics of 28 patients with (n=20, 71%) or without an associated hematologic neoplasm. De novo mast cell leukemia was diagnosed in 16 of 28 (57%) patients and secondary mast cell leukemia evolving from other advanced systemic mastocytosis subtypes in 12 of 28 (43%) patients, of which 7 patients progressed while on cytoreductive treatment. Median bone marrow mast cell infiltration was 65% and median serum tryptase was 520 μg/L. C-findings were identified in 26 of 28 (93%) patients. Mutations in KIT (D816V, n=19; D816H/Y, n=5; F522C, n=1) were detected in 25 of 28 (89%) patients and prognostically relevant additional mutations in SRSF2, ASXL1 or RUNX1 (S/A/Rpos) in 13 of 25 (52%) patients. Overall response rate in 18 treatment-naïve patients was 5 of 12 (42%) on midostaurin and 1 of 6 (17%) on cladribine, and after switch 1 of 4 (25%) on midostaurin and 0 of 3 on cladribine, respectively. S/A/Rpos adversely affected response to treatment and progression to secondary mast cell leukemia (n=6) or acute myeloid leukemia (n=3) while on treatment (P<0.05). The median overall survival from mast cell leukemia diagnosis was 17 months as compared to 44 months in a control group of 124 patients with advanced systemic mastocytosis but without mast cell leukemia (P=0.03). In multivariate analyses, S/A/Rpos remained the only independent poor prognostic variable predicting overall survival (P=0.007). In conclusion, the molecular signature should be determined in all patients with mast cell leukemia because of its significant clinical and prognostic relevance.
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Affiliation(s)
- Mohamad Jawhar
- Department of Hematology and Oncology, University Medical Centre Mannheim, Germany.,Medical Faculty Mannheim, University of Heidelberg, Germany
| | - Juliana Schwaab
- Department of Hematology and Oncology, University Medical Centre Mannheim, Germany.,Medical Faculty Mannheim, University of Heidelberg, Germany
| | | | - Nicole Naumann
- Department of Hematology and Oncology, University Medical Centre Mannheim, Germany.,Medical Faculty Mannheim, University of Heidelberg, Germany
| | - Hans-Peter Horny
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
| | - Karl Sotlar
- University Institute of Pathology, University Hospital Salzburg, Paracelsus Medical University, Salzburg, Austria
| | | | - Karla Schmitt
- Department of Hematology and Oncology, University Hospital Aachen, Germany
| | - Alice Fabarius
- Department of Hematology and Oncology, University Medical Centre Mannheim, Germany.,Medical Faculty Mannheim, University of Heidelberg, Germany
| | - Peter Valent
- Department of Internal Medicine I, Division of Hematology and Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Austria
| | - Wolf-Karsten Hofmann
- Department of Hematology and Oncology, University Medical Centre Mannheim, Germany.,Medical Faculty Mannheim, University of Heidelberg, Germany
| | - Nicholas C P Cross
- Wessex Regional Genetics Laboratory, Salisbury, UK.,Faculty of Medicine, University of Southampton, UK
| | - Georgia Metzgeroth
- Department of Hematology and Oncology, University Medical Centre Mannheim, Germany.,Medical Faculty Mannheim, University of Heidelberg, Germany
| | - Andreas Reiter
- Department of Hematology and Oncology, University Medical Centre Mannheim, Germany .,Medical Faculty Mannheim, University of Heidelberg, Germany
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22
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Alvarez-Twose I, Matito A, Morgado JM, Sánchez-Muñoz L, Jara-Acevedo M, García-Montero A, Mayado A, Caldas C, Teodósio C, Muñoz-González JI, Mollejo M, Escribano L, Orfao A. Imatinib in systemic mastocytosis: a phase IV clinical trial in patients lacking exon 17 KIT mutations and review of the literature. Oncotarget 2016; 8:68950-68963. [PMID: 28978170 PMCID: PMC5620310 DOI: 10.18632/oncotarget.10711] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 05/29/2016] [Indexed: 12/15/2022] Open
Abstract
Resistance to imatinib has been recurrently reported in systemic mastocytosis (SM) carrying exon 17 KIT mutations. We evaluated the efficacy and safety of imatinib therapy in 10 adult SM patients lacking exon 17 KIT mutations, 9 of which fulfilled criteria for well-differentiated SM (WDSM). The World Health Organization 2008 disease categories among WDSM patients were mast cell (MC) leukemia (n = 3), indolent SM (n = 3) and cutaneous mastocytosis (n = 3); the remainder case had SM associated with a clonal haematological non-MC disease. Patients were given imatinib for 12 months -400 or 300 mg daily depending on the presence vs. absence of > 30% bone marrow (BM) MCs and/or signs of advanced disease-. Absence of exon 17 KIT mutations was confirmed in highly-purified BM MCs by peptide nucleic acid-mediated PCR, while mutations involving other exons were investigated by direct sequencing of purified BM MC DNA. Complete response (CR) was defined as resolution of BM MC infiltration, skin lesions, organomegalies and MC-mediator release-associated symptoms, plus normalization of serum tryptase. Criteria for partial response (PR) included ≥ 50% reduction in BM MC infiltration and improvement of skin lesions and/or organomegalies. Treatment was well-tolerated with an overall response rate of 50%, including early and sustained CR in four patients, three of whom had extracellular mutations of KIT, and PR in one case. This later patient and all non-responders (n = 5) showed wild-type KIT. These results together with previous data from the literature support the relevance of the KIT mutational status in selecting SM patients who are candidates for imatinib therapy.
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Affiliation(s)
- Iván Alvarez-Twose
- Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast), Hospital Virgen del Valle, Toledo, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Almudena Matito
- Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast), Hospital Virgen del Valle, Toledo, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - José Mário Morgado
- Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast), Hospital Virgen del Valle, Toledo, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Laura Sánchez-Muñoz
- Instituto de Estudios de Mastocitosis de Castilla La Mancha (CLMast), Hospital Virgen del Valle, Toledo, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - María Jara-Acevedo
- Centro de Investigación del Cáncer/IBMCC (USAL/CSIC) and IBSAL, Departamento de Medicina and Servicio General de Citometría, University of Salamanca, Salamanca, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Andrés García-Montero
- Centro de Investigación del Cáncer/IBMCC (USAL/CSIC) and IBSAL, Departamento de Medicina and Servicio General de Citometría, University of Salamanca, Salamanca, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Andrea Mayado
- Centro de Investigación del Cáncer/IBMCC (USAL/CSIC) and IBSAL, Departamento de Medicina and Servicio General de Citometría, University of Salamanca, Salamanca, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Carolina Caldas
- Centro de Investigación del Cáncer/IBMCC (USAL/CSIC) and IBSAL, Departamento de Medicina and Servicio General de Citometría, University of Salamanca, Salamanca, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Cristina Teodósio
- Department of Immunology, Erasmus Medical Center, University of Rotterdam, Rotterdam, The Netherlands
| | - Javier Ignacio Muñoz-González
- Centro de Investigación del Cáncer/IBMCC (USAL/CSIC) and IBSAL, Departamento de Medicina and Servicio General de Citometría, University of Salamanca, Salamanca, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Manuela Mollejo
- Department of Pathology, Hospital Virgen de la Salud, Toledo, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Luis Escribano
- Centro de Investigación del Cáncer/IBMCC (USAL/CSIC) and IBSAL, Departamento de Medicina and Servicio General de Citometría, University of Salamanca, Salamanca, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
| | - Alberto Orfao
- Centro de Investigación del Cáncer/IBMCC (USAL/CSIC) and IBSAL, Departamento de Medicina and Servicio General de Citometría, University of Salamanca, Salamanca, Spain.,Spanish Network on Mastocytosis (REMA), Toledo and Salamanca, Spain
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23
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Youk J, Koh Y, Kim JW, Kim DY, Park H, Jung WJ, Ahn KS, Yun H, Park I, Sun CH, Lee S, Yoon SS. A scientific treatment approach for acute mast cell leukemia: using a strategy based on next-generation sequencing data. Blood Res 2016; 51:17-22. [PMID: 27104187 PMCID: PMC4828523 DOI: 10.5045/br.2016.51.1.17] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 02/19/2016] [Accepted: 03/02/2016] [Indexed: 01/08/2023] Open
Abstract
Background Mast cell leukemia (MCL) is the most aggressive form of systemic mastocytosis disorders. Owing to its rarity, neither pathogenesis nor standard treatment is established for this orphan disease. Hence, we tried to treat a patient with MCL based on the exome and transcriptome sequencing results of the patient's own DNA and RNA. Methods First, tumor DNA and RNA were extracted from bone marrow at the time of diagnosis. Germline DNA was extracted from the patient's saliva 45 days after induction chemotherapy and used as a control. Then, we performed whole-exome sequencing (WES) using the DNA and whole transcriptome sequencing (WTS) using the RNA. Single nucleotide variants (SNVs) were called using MuTect and GATK. Samtools, FusionMap, and Gene Set Enrichment Analysis were utilized to analyze WTS results. Results WES and WTS results revealed mutation in KIT S476I. Fusion analysis was performed using WTS data, which suggested a possible RARα-B2M fusion. When RNA expression analysis was performed using WTS data, upregulation of PIK3/AKT pathway, downstream of KIT and mTOR, was observed. Based on our WES and WTS results, we first administered all-trans retinoic acid, then dasatinib, and finally, an mTOR inhibitor. Conclusion We present a case of orphan disease where we used a targeted approach using WES and WTS data of the patient. Even though our treatment was not successful, use of our approach warrants further validation.
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Affiliation(s)
- Jeonghwan Youk
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Youngil Koh
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Ji-Won Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Dae-Yoon Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Hyunkyung Park
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Woo June Jung
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Kwang-Sung Ahn
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Hongseok Yun
- Bioinformatics Group, Platform Development Center, CSP R&D, Samsung SDS, Seoul, Korea
| | - Inho Park
- Bioinformatics Group, Platform Development Center, CSP R&D, Samsung SDS, Seoul, Korea
| | - Choong-Hyun Sun
- Bioinformatics Group, Platform Development Center, CSP R&D, Samsung SDS, Seoul, Korea
| | - Seungmook Lee
- Bioinformatics Group, Platform Development Center, CSP R&D, Samsung SDS, Seoul, Korea
| | - Sung-Soo Yoon
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.; Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea.; Clinical Research Institute, Seoul National University Hospital, Seoul, Korea
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24
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Complete response to gemtuzumab ozogamicin in a patient with refractory mast cell leukemia. Leukemia 2016; 30:1753-6. [PMID: 26876592 DOI: 10.1038/leu.2016.30] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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25
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Gotlib J. Tyrosine Kinase Inhibitors and Therapeutic Antibodies in Advanced Eosinophilic Disorders and Systemic Mastocytosis. Curr Hematol Malig Rep 2015; 10:351-61. [DOI: 10.1007/s11899-015-0280-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Arock M, Sotlar K, Akin C, Broesby-Olsen S, Hoermann G, Escribano L, Kristensen TK, Kluin-Nelemans HC, Hermine O, Dubreuil P, Sperr WR, Hartmann K, Gotlib J, Cross NCP, Haferlach T, Garcia-Montero A, Orfao A, Schwaab J, Triggiani M, Horny HP, Metcalfe DD, Reiter A, Valent P. KIT mutation analysis in mast cell neoplasms: recommendations of the European Competence Network on Mastocytosis. Leukemia 2015; 29:1223-32. [PMID: 25650093 PMCID: PMC4522520 DOI: 10.1038/leu.2015.24] [Citation(s) in RCA: 195] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 01/01/2015] [Accepted: 01/09/2015] [Indexed: 12/20/2022]
Abstract
Although acquired mutations in KIT are commonly detected in various categories of mastocytosis, the methodologies applied to detect and quantify the mutant type and allele burden in various cells and tissues are poorly defined. We here propose a consensus on methodologies used to detect KIT mutations in patients with mastocytosis at diagnosis and during follow-up with sufficient precision and sensitivity in daily practice. In addition, we provide recommendations for sampling and storage of diagnostic material as well as a robust diagnostic algorithm. Using highly sensitive assays, KIT D816V can be detected in peripheral blood leukocytes from most patients with systemic mastocytosis (SM) that is a major step forward in screening and SM diagnosis. In addition, the KIT D816V allele burden can be followed quantitatively during the natural course or during therapy. Our recommendations should greatly facilitate diagnostic and follow-up investigations in SM in daily practice as well as in clinical trials. In addition, the new tools and algorithms proposed should lead to a more effective screen, early diagnosis of SM and help to avoid unnecessary referrals.
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Affiliation(s)
- Michel Arock
- Molecular Oncology and Pharmacology, LBPA CNRS UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
- Laboratory of Hematology, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Karl Sotlar
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
| | - Cem Akin
- Division of Allergy and Immunology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, USA
| | - Sigurd Broesby-Olsen
- Department of Dermatology and Allergy Centre, Odense University Hospital, Odense, Denmark
| | - Gregor Hoermann
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Luis Escribano
- Servicio Central de Citometria, Centro de Investigacion del Cancer (IBMCC, CSIC/USAL), IBSAL and Department of Medicine, University of Salamanca, Salamanca, Spain
| | | | - Hanneke C. Kluin-Nelemans
- Department of Hematology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Olivier Hermine
- Clinical Hematology Department, Faculty of Medicine and AP-HP Necker-Enfants Malades, Paris Descartes University, Paris, France
| | - Patrice Dubreuil
- Signaling, Hematopoiesis and Mechanism of Oncogenesis, Inserm U1068, CRCM, Marseille, France
- Institut Paoli-Calmettes, Marseille, France
- Aix-Marseille University, UM 105, Marseille, France
- CNRS, UMR7258, CRCM, Marseille; France
| | - Wolfgang R. Sperr
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Vienna, Austria
| | - Karin Hartmann
- Department of Dermatology, University of Cologne, Cologne, Germany
| | - Jason Gotlib
- Stanford Cancer Institute, Stanford University School of Medicine, Stanford, USA
| | - Nicholas CP Cross
- Wessex Regional Genetics Laboratory, Salisbury, and Faculty of Medicine, University of Southampton, Southampton, England
| | | | - Andres Garcia-Montero
- Servicio Central de Citometria, Centro de Investigacion del Cancer (IBMCC, CSIC/USAL), IBSAL and Department of Medicine, University of Salamanca, Salamanca, Spain
| | - Alberto Orfao
- Servicio Central de Citometria, Centro de Investigacion del Cancer (IBMCC, CSIC/USAL), IBSAL and Department of Medicine, University of Salamanca, Salamanca, Spain
| | - Juliana Schwaab
- III. Medizinische Klinik, Hematology and Oncology, Universitätsmedizin Mannheim, Mannheim, Germany
| | - Massimo Triggiani
- Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy
| | - Hans-Peter Horny
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
| | | | - Andreas Reiter
- III. Medizinische Klinik, Hematology and Oncology, Universitätsmedizin Mannheim, Mannheim, Germany
| | - Peter Valent
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Vienna, Austria
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27
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Kobayashi M, Kuroki S, Tanaka Y, Moriya Y, Kozutumi Y, Uehara Y, Ono K, Tamura K, Washizu T, Bonkobara M. Molecular changes associated with the development of resistance to imatinib in an imatinib-sensitive canine neoplastic mast cell line carrying a KIT c.1523A>T mutation. Eur J Haematol 2015; 95:524-31. [PMID: 25684098 DOI: 10.1111/ejh.12526] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2015] [Indexed: 12/17/2022]
Abstract
Although imatinib has therapeutic activity for certain subsets of patients with mastocytosis, it is not always curative. Here, molecular mechanisms that confer imatinib resistance to neoplastic mast cells were investigated using an imatinib-sensitive canine neoplastic mast cell line VI-MC carrying a KIT c.1523A>T activating mutation. Two imatinib-resistant sublines were established by culturing VI-MC cells in increasing concentrations of imatinib (1 μM resistant, rVI-MC1; 10 μM resistant, rVI-MC10). Both sublines had a second KIT mutation c.2443G>C. Recombinant KIT with the second mutation was insensitive to 1 μM but sensitive to 10 μM imatinib. The effect of imatinib on the phosphorylation of KIT and its downstream signalling proteins was then examined using these sublines. KIT and ERK were constitutively phosphorylated in both sublines, and their phosphorylation was suppressed by 10 μM imatinib in rVI-MC1 cells. However, KIT but not ERK phosphorylation was suppressed in rVI-MC10 cells. The phosphorylation of ERK in rVI-MC10 cells was also not diminished by the Src family kinase (SFK) inhibitor dasatinib. This second mutation in KIT may play an important role in imatinib resistance in neoplastic mast cells. Furthermore, KIT/SFK-independent activation of ERK would be involved in imatinib resistance when the neoplastic cells are exposed to higher concentrations of imatinib.
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Affiliation(s)
- Masato Kobayashi
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Shiori Kuroki
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Yu Tanaka
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Yukari Moriya
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Yukari Kozutumi
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Yuji Uehara
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Kenichiro Ono
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan.,Japan Animal Referral Medical Center, Kuji, Takatsu-ku, Kawasaki-shi, Kanagawa, Japan
| | - Kyoichi Tamura
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Tsukimi Washizu
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Makoto Bonkobara
- Department of Veterinary Clinical Pathology, Nippon Veterinary and Life Science University, Kyonan-cho, Musashino-shi, Tokyo, Japan
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28
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Méni C, Bruneau J, Georgin-Lavialle S, Le Saché de Peufeilhoux L, Damaj G, Hadj-Rabia S, Fraitag S, Dubreuil P, Hermine O, Bodemer C. Paediatric mastocytosis: a systematic review of 1747 cases. Br J Dermatol 2015; 172:642-51. [DOI: 10.1111/bjd.13567] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/09/2014] [Indexed: 01/08/2023]
Affiliation(s)
- C. Méni
- Service de Dermatologie de l'Adulte et de l'Enfant; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; Centre de Référence des Mastocytoses, CEREMAST; Université Paris Descartes; Paris Sorbonne Cité; 149 Rue de Sèvres 75743 Paris Cedex 15 France
| | - J. Bruneau
- Service d'Anatomie et Cytologie Pathologiques; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; Université Paris Descartes; Paris Sorbonne Cité; 149 Rue de Sèvres 75743 Paris Cedex 15 France
- INSERM U1163 and CNRS ERL 8254; Laboratory of Physiopathology and Treatment of Hematological Disorders; Hôpital Necker-Enfants Malades; 149 Rue des Sèvres 75743 Paris Cedex 15 France
- AP-HP Necker-Enfants Malades; Institut Imagine; Université Sorbonne Paris Cité; 149 Rue des Sèvres 75743 Paris Cedex 15 France
| | - S. Georgin-Lavialle
- Service de Médecine Interne; Faculté de Médecine et AP-HP; Hôpital Tenon; Université Pierre et Marie Curie; 20 Rue de la Chine 75020 Paris France
| | - L. Le Saché de Peufeilhoux
- Service de Dermatologie de l'Adulte et de l'Enfant; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; Centre de Référence des Mastocytoses, CEREMAST; Université Paris Descartes; Paris Sorbonne Cité; 149 Rue de Sèvres 75743 Paris Cedex 15 France
| | - G. Damaj
- Centre de Référence des Mastocytoses, CEREMAST; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; 149 rue de Sèvres 75743 Paris Cedex 15 France
- Service d'Hématologie Adultes; Faculté de Médecine et Centre Hospitalier Universitaire de Caen; Avenue côte de Nacre 14000 Caen France
| | - S. Hadj-Rabia
- Service de Dermatologie de l'Adulte et de l'Enfant; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; Centre de Référence des Mastocytoses, CEREMAST; Université Paris Descartes; Paris Sorbonne Cité; 149 Rue de Sèvres 75743 Paris Cedex 15 France
- AP-HP Necker-Enfants Malades; Institut Imagine; Université Sorbonne Paris Cité; 149 Rue des Sèvres 75743 Paris Cedex 15 France
| | - S. Fraitag
- Service d'Anatomie et Cytologie Pathologiques; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; Université Paris Descartes; Paris Sorbonne Cité; 149 Rue de Sèvres 75743 Paris Cedex 15 France
| | - P. Dubreuil
- Centre de Référence des Mastocytoses, CEREMAST; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; 149 rue de Sèvres 75743 Paris Cedex 15 France
- Inserm, U1068, CRCM, Signaling, Hematopoiesis and Mechanism of Oncogenesis; Institut Paoli-Calmettes; Université d' Aix-Marseille; F-13284 Marseille France
- UMR7258; CNRS; F-13009 Marseille France
| | - O. Hermine
- INSERM U1163 and CNRS ERL 8254; Laboratory of Physiopathology and Treatment of Hematological Disorders; Hôpital Necker-Enfants Malades; 149 Rue des Sèvres 75743 Paris Cedex 15 France
- AP-HP Necker-Enfants Malades; Institut Imagine; Université Sorbonne Paris Cité; 149 Rue des Sèvres 75743 Paris Cedex 15 France
- Centre de Référence des Mastocytoses, CEREMAST; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; 149 rue de Sèvres 75743 Paris Cedex 15 France
- Service d'Hématologie Adultes; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; Université Paris Descartes; Paris Sorbonne Cité; 149 Rue des Sèvres 75743 Paris Cedex 15 France
| | - C. Bodemer
- Service de Dermatologie de l'Adulte et de l'Enfant; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; Centre de Référence des Mastocytoses, CEREMAST; Université Paris Descartes; Paris Sorbonne Cité; 149 Rue de Sèvres 75743 Paris Cedex 15 France
- AP-HP Necker-Enfants Malades; Institut Imagine; Université Sorbonne Paris Cité; 149 Rue des Sèvres 75743 Paris Cedex 15 France
- Centre de Référence des Mastocytoses, CEREMAST; Faculté de Médecine et AP-HP; Hôpital Necker-Enfants Malades; 149 rue de Sèvres 75743 Paris Cedex 15 France
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29
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Valent P, Sotlar K, Sperr WR, Reiter A, Arock M, Horny HP. Chronic mast cell leukemia: a novel leukemia-variant with distinct morphological and clinical features. Leuk Res 2015; 39:1-5. [PMID: 25443885 PMCID: PMC4896385 DOI: 10.1016/j.leukres.2014.09.010] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 09/15/2014] [Accepted: 09/21/2014] [Indexed: 01/05/2023]
Abstract
Mast cell leukemia (MCL) is a rare form of systemic mastocytosis characterized by leukemic expansion of mostly immature mast cells, organ damage, drug-resistance, and a poor prognosis. Even when treated with chemotherapy, most patients have a life-expectancy of less than one year. However, there are rare patients with MCL in whom the condition is less aggressive and does not cause organ damage within a short time. In these patients, mast cells exhibit a more mature morphology when compared to acute MCL. A recently proposed classification suggests that these cases are referred to as chronic MCL. In the present article, we discuss clinical, histopathological and morphological aspects of acute and chronic MCL.
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Affiliation(s)
- Peter Valent
- Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria.
| | - Karl Sotlar
- Institute of Pathology, Ludwig-Maximilians University, Munich, Germany
| | - Wolfgang R Sperr
- Department of Internal Medicine I, Division of Hematology & Hemostaseology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
| | - Andreas Reiter
- III. Medizinische Klinik, Universitäts-Medizin Mannheim, Universität Heidelberg, Mannheim, Germany
| | - Michel Arock
- LBPA CNRS UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - Hans-Peter Horny
- Institute of Pathology, Ludwig-Maximilians University, Munich, Germany
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30
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Valent P, Sotlar K, Sperr WR, Escribano L, Yavuz S, Reiter A, George TI, Kluin-Nelemans HC, Hermine O, Butterfield JH, Hägglund H, Ustun C, Hornick JL, Triggiani M, Radia D, Akin C, Hartmann K, Gotlib J, Schwartz LB, Verstovsek S, Orfao A, Metcalfe DD, Arock M, Horny HP. Refined diagnostic criteria and classification of mast cell leukemia (MCL) and myelomastocytic leukemia (MML): a consensus proposal. Ann Oncol 2014; 25:1691-1700. [PMID: 24675021 PMCID: PMC4155468 DOI: 10.1093/annonc/mdu047] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/09/2014] [Accepted: 01/17/2014] [Indexed: 01/08/2023] Open
Abstract
Mast cell leukemia (MCL), the leukemic manifestation of systemic mastocytosis (SM), is characterized by leukemic expansion of immature mast cells (MCs) in the bone marrow (BM) and other internal organs; and a poor prognosis. In a subset of patients, circulating MCs are detectable. A major differential diagnosis to MCL is myelomastocytic leukemia (MML). Although criteria for both MCL and MML have been published, several questions remain concerning terminologies and subvariants. To discuss open issues, the EU/US-consensus group and the European Competence Network on Mastocytosis (ECNM) launched a series of meetings and workshops in 2011-2013. Resulting discussions and outcomes are provided in this article. The group recommends that MML be recognized as a distinct condition defined by mastocytic differentiation in advanced myeloid neoplasms without evidence of SM. The group also proposes that MCL be divided into acute MCL and chronic MCL, based on the presence or absence of C-Findings. In addition, a primary (de novo) form of MCL should be separated from secondary MCL that typically develops in the presence of a known antecedent MC neoplasm, usually aggressive SM (ASM) or MC sarcoma. For MCL, an imminent prephase is also proposed. This prephase represents ASM with rapid progression and 5%-19% MCs in BM smears, which is generally accepted to be of prognostic significance. We recommend that this condition be termed ASM in transformation to MCL (ASM-t). The refined classification of MCL fits within and extends the current WHO classification; and should improve prognostication and patient selection in practice as well as in clinical trials.
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MESH Headings
- Bone Marrow Examination
- Diagnosis, Differential
- Disease Progression
- Humans
- Leukemia, Mast-Cell/classification
- Leukemia, Mast-Cell/diagnosis
- Leukemia, Myelomonocytic, Acute/classification
- Leukemia, Myelomonocytic, Acute/diagnosis
- Leukemia, Myelomonocytic, Chronic/classification
- Leukemia, Myelomonocytic, Chronic/diagnosis
- Mast Cells/pathology
- Mastocytosis/pathology
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Affiliation(s)
- P Valent
- Division of Hematology, Department of Medicine I, Medical University of Vienna, Vienna, Austria.
| | - K Sotlar
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
| | - W R Sperr
- Division of Hematology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
| | - L Escribano
- Servicio Central de Citometria, Centro de Investigacion del Cancer (IBMCC; CSIC/USAL) and Department of Medicine, University of Salamanca, Salamanca, Spain
| | - S Yavuz
- Division of Hematology, Department of Internal Medicine, University of Istanbul, Turkey
| | - A Reiter
- III. Medizinische Klinik, Universitätsmedizin Mannheim, Universität Heidelberg, Mannheim, Germany
| | - T I George
- Department of Pathology, University of New Mexico, Albuquerque, USA
| | - H C Kluin-Nelemans
- Department of Hematology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - O Hermine
- Imagine Institute Université Paris Descartes, Sorbonne, Paris Cité, Centre national de référence des mastocytoses, Paris, France
| | | | - H Hägglund
- Hematology Center Karolinska, Karolinska University Hospital, Stockholm, Sweden
| | - C Ustun
- Division of Hematology-Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis
| | - J L Hornick
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, USA
| | - M Triggiani
- Division of Allergy and Clinical Immunology, University of Salerno, Salerno, Italy
| | - D Radia
- Department of Haematology, Guys and St Thomas' NHS Foundation Trust, Guys Hospital, London, UK
| | - C Akin
- Division of Allergy and Immunology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, USA
| | - K Hartmann
- Department of Dermatology, University of Cologne, Cologne, Germany
| | - J Gotlib
- Stanford Cancer Center, Stanford University School of Medicine, Stanford
| | - L B Schwartz
- Department of Internal Medicine, Division of Rheumatology, Allergy & Immunology, Virginia Commonwealth University, Richmond
| | - S Verstovsek
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston
| | - A Orfao
- Servicio Central de Citometria, Centro de Investigacion del Cancer (IBMCC; CSIC/USAL) and Department of Medicine, University of Salamanca, Salamanca, Spain
| | - D D Metcalfe
- Laboratory of Allergic Diseases, NIAID, NIH, Bethesda, USA
| | - M Arock
- LBPA CNRS UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France
| | - H-P Horny
- Institute of Pathology, Ludwig-Maximilians-University, Munich, Germany
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31
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Bibi S, Langenfeld F, Jeanningros S, Brenet F, Soucie E, Hermine O, Damaj G, Dubreuil P, Arock M. Molecular Defects in Mastocytosis. Immunol Allergy Clin North Am 2014; 34:239-62. [DOI: 10.1016/j.iac.2014.01.009] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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32
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Alvarez-Twose I, Matito A, Sánchez-Muñoz L, Morgado JM, Escribano L. Management of adult mastocytosis. Expert Opin Orphan Drugs 2014. [DOI: 10.1517/21678707.2014.884922] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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33
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Sperr WR, Valent P. Diagnosis, progression patterns and prognostication in mastocytosis. Expert Rev Hematol 2014; 5:261-74. [DOI: 10.1586/ehm.12.12] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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34
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Marech I, Patruno R, Zizzo N, Gadaleta C, Introna M, Zito AF, Gadaleta CD, Ranieri G. Masitinib (AB1010), from canine tumor model to human clinical development: where we are? Crit Rev Oncol Hematol 2013; 91:98-111. [PMID: 24405856 DOI: 10.1016/j.critrevonc.2013.12.011] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/11/2013] [Accepted: 12/09/2013] [Indexed: 01/11/2023] Open
Abstract
Masitinib mesylate (AB1010) is a novel potent and selective tyrosine kinase inhibitor, targeting mainly wild-type and mutated c-Kit receptor (c-KitR), Platelet Derived Growth Factor Receptor-alfa/beta (PDGFRa/ß), Lymphocyte-specific kinase (Lck), Lck/Yes-related protein (LYn), Fibroblast Growth Factor Receptor 3 (FGFR3) and Focal Adhesion Kinase (FAK). It is the first anticancer therapy approved in veterinary medicine for the treatment of unresectable canine mast cell tumors (CMCTs), harboring activating c-KitR mutations, at dose of 12.5mg/kg once daily. Considering its anti-proliferative action, principally given by inhibiting the MCs c-KitR anti-angiogenic pathway that leads cancer progression, and its role as chemosensitizer, masitinib is under clinical investigation in several human malignancies (Gastro-Intestinal Stromal Tumors, acute myeloid leukemia, systemic mastocytosis, pancreatic cancer, multiple myeloma, non-small cell lung cancer, melanoma, ovarian and prostate cancer), which are characterized by similar canine c-KIT proto-oncogene mutations. Here, we analyze masitinib structure activity, its pharmacokinetics compared to imatinib, the c-KitR pathway referring to the most frequent c-KIT mutations sensitive or resistant to this novel drug compared to imatinib, and masitinib safety profile. We, also, explore preclinical and clinical (completed and ongoing) trials with the aim to emphasize as this recent anti-angiogenic therapy, at first approved in CMCTs and, currently in development for the treatment of several human neoplasms, could be represent a milestone in translational oncology, in which the murine experimental model of cancer research could be integrated by canine spontaneous tumor model.
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Affiliation(s)
- Ilaria Marech
- Interventional Radiology Unit with Integrated Section of Translational Medical Oncology, National Cancer Research Centre "Giovanni Paolo II", Bari, Italy
| | - Rosa Patruno
- Department of Prevention and Animal Health, ASL BAT, Barletta, Bari, Italy
| | - Nicola Zizzo
- Chair of Pathology, Veterinary Medical School, University of Bari, Valenzano, Bari, Italy
| | - Claudia Gadaleta
- Chair of Pathology, Veterinary Medical School, University of Bari, Valenzano, Bari, Italy
| | - Marcello Introna
- Chair of Pathology, Veterinary Medical School, University of Bari, Valenzano, Bari, Italy
| | | | - Cosmo Damiano Gadaleta
- Interventional Radiology Unit with Integrated Section of Translational Medical Oncology, National Cancer Research Centre "Giovanni Paolo II", Bari, Italy
| | - Girolamo Ranieri
- Interventional Radiology Unit with Integrated Section of Translational Medical Oncology, National Cancer Research Centre "Giovanni Paolo II", Bari, Italy.
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35
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Abstract
Mast cell diseases comprise a spectrum of disorders including cutaneous mastocytosis, indolent or aggressive systemic variants including leukemia, and unifocal tumor formations such as benign extracutaneous mastocytoma or aggressive mast cell sarcoma (MCS). Many mast cell diseases are associated with aberrancy of c-KIT proto-oncogene resulting in tyrosine kinase activity, typically exhibiting point mutation in codon 816. MCS is an exceedingly rare clinicopathologic entity characterized by a unifocal accumulation of neoplastic mast cells that grow in a locally destructive manner. We report a case in a 2-year-old boy who was initially diagnosed at 8 months of age with atypical cutaneous mastocytoma of the right ear with subsequent aggressive, destructive growth pattern; features that were most consistent with MCS. So far, MCS has been documented in the literature in at least 6 human cases. To the best of our knowledge, our case represents the first MCS in an infant. Thorough multimodal approach with strict follow-up is relevant in appropriately diagnosing this rare entity, particularly in differentiating this lesion from other neoplasms that are more likely to occur in infancy.
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Abstract
Mast cell leukemia (MCL) is a very rare form of aggressive systemic mastocytosis accounting for < 1% of all mastocytosis. It may appear de novo or secondary to previous mastocytosis and shares more clinicopathologic aspects with systemic mastocytosis than with acute myeloid leukemia. Symptoms of mast cell activation-involvement of the liver, spleen, peritoneum, bones, and marrow-are frequent. Diagnosis is based on the presence of ≥ 20% atypical mast cells in the marrow or ≥ 10% in the blood; however, an aleukemic variant is frequently encountered in which the number of circulating mast cells is < 10%. The common phenotypic features of pathologic mast cells encountered in most forms of mastocytosis are unreliable in MCL. Unexpectedly, non-KIT D816V mutations are frequent and therefore, complete gene sequencing is necessary. Therapy usually fails and the median survival time is < 6 months. The role of combination therapies and bone marrow transplantation needs further investigation.
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Ouerhani S, Gharbi H, Menif S, Safra I, Douzi K, Abbes S. KIT mutation detection in Tunisian patients with newly diagnosed myelogenous leukemia: prevalence and prognostic significance. Cancer Genet 2012; 205:436-41. [PMID: 22939396 DOI: 10.1016/j.cancergen.2012.05.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 04/19/2012] [Accepted: 05/15/2012] [Indexed: 11/28/2022]
Abstract
The KIT gene encodes a class III tyrosine kinase receptor in which specific somatic mutations have been found to be associated with many diseases. In this work, we investigated the prevalence of KIT mutations in patients with chronic and acute myelogenous leukemia (CML and AML) and their prognostic significance. A total of 157 subjects were included in the present study (84 patients with CML, 33 with AML, and 40 healthy controls). Patients were analyzed at the first diagnosis, and the KIT mutations were screened by polymerase chain reaction (PCR) and direct sequencing technologies. The results demonstrated the presence of a G/A transition at codon 796, which is associated with the R796K protein variation. This mutation was detected at 21.42% in the CML subgroup and was absent in both AML patients and healthy controls; however, no correlation was found between this mutation and clinical parameters such as the molecular response to Gleevec. In conclusion, we retain that the KIT gene is highly mutated in the CML subgroup, but its role as a prognostic factor needs to be further elucidated.
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Affiliation(s)
- Slah Ouerhani
- Laboratory of Molecular and Cellular Haematology, Pasteur Institute of Tunis, University of Tunis El Manar, Tunis, Tunisia
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Mast Cell Leukaemia: c-KIT Mutations Are Not Always Positive. Case Rep Hematol 2012; 2012:517546. [PMID: 22997594 PMCID: PMC3444844 DOI: 10.1155/2012/517546] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Accepted: 07/16/2012] [Indexed: 01/08/2023] Open
Abstract
Mast cell leukemia (MCL) is a rare and aggressive disease with poor prognosis and short survival time. D816V c-KIT mutation is the most frequent molecular abnormality and plays a crucial role in the pathogenesis and development of the disease. Thus, comprehensive diagnostic investigations and molecular studies should be carefully carried out to facilitate the therapeutic choice. A MCL patient's case with rare phenotypic and genotypic characteristics is described with review of major clinical biological and therapeutic approaches in MCL.
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Georgin-Lavialle S, Lhermitte L, Suarez F, Yang Y, Letard S, Hanssens K, Feger F, Renand A, Brouze C, Canioni D, Asnafi V, Chandesris MO, Aouba A, Gineste P, Macintyre E, Mansfield CD, Moussy A, Lepelletier Y, Dubreuil P, Hermine O. Mast cell leukemia: identification of a new c-Kit mutation, dup(501-502), and response to masitinib, a c-Kit tyrosine kinase inhibitor. Eur J Haematol 2012; 89:47-52. [DOI: 10.1111/j.1600-0609.2012.01761.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Álvarez-Twose I, González P, Morgado JM, Jara-Acevedo M, Sánchez-Muñoz L, Matito A, Mollejo M, Orfao A, Escribano L. Complete Response After Imatinib Mesylate Therapy in a Patient With Well-Differentiated Systemic Mastocytosis. J Clin Oncol 2012; 30:e126-9. [DOI: 10.1200/jco.2011.38.9973] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Iván Álvarez-Twose
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Hospital Virgen del Valle, Toledo, Spain
| | | | - José Mário Morgado
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Hospital Virgen del Valle, Toledo, Spain
| | - María Jara-Acevedo
- Centro de Investigación del Cáncer, Universidad de Salamanca, Salamanca, Spain
| | - Laura Sánchez-Muñoz
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Hospital Virgen del Valle, Toledo, Spain
| | - Almudena Matito
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Hospital Virgen del Valle, Toledo, Spain
| | | | - Alberto Orfao
- Centro de Investigación del Cáncer, Universidad de Salamanca, Salamanca, Spain
| | - Luis Escribano
- Instituto de Estudios de Mastocitosis de Castilla La Mancha, Hospital Virgen del Valle, Toledo, Spain
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Wasag B, Niedoszytko M, Piskorz A, Lange M, Renke J, Jassem E, Biernat W, Debiec-Rychter M, Limon J. Novel, activating KIT-N822I mutation in familial cutaneous mastocytosis. Exp Hematol 2011; 39:859-65.e2. [DOI: 10.1016/j.exphem.2011.05.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 05/18/2011] [Accepted: 05/20/2011] [Indexed: 01/02/2023]
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42
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Klion AD. Eosinophilic myeloproliferative disorders. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2011; 2011:257-263. [PMID: 22160043 PMCID: PMC4091807 DOI: 10.1182/asheducation-2011.1.257] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Despite recent attempts to define and classify patients with marked eosinophilia and features consistent with myeloproliferative disease, areas of controversy remain. These are particularly apparent in situations in which multiple lineages are involved in a clonal process and clinical manifestations are overlapping. Although the introduction of new molecular diagnostics and targeted therapies has begun to clarify the boundaries between some of these disorders, several questions remain with respect to the classification of patients with myeloproliferative hypereosinophilic syndrome (HES) of unknown etiology.
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Affiliation(s)
- Amy D Klion
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
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