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Farmer I, Radia DH. Systemic Mastocytosis: State of the Art. Curr Hematol Malig Rep 2024:10.1007/s11899-024-00737-8. [PMID: 39187708 DOI: 10.1007/s11899-024-00737-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2024] [Indexed: 08/28/2024]
Abstract
PURPOSE OF REVIEW Since identification of Systemic mastocytosis (SM) as a distinct disease entity by the World Health Organisation (WHO), there has been a wealth of new research in therapeutic targeting of the pathogenic C-KIT D816V mutation. RECENT FINDINGS Avapritinib, the first licensed drug in SM capable of disease modification alongside the increasingly potent, oral and highly selective KIT tyrosine kinase inhibitors (TKIs) Bezuclastinib and now Elenestinib have enabled the prospect of long-term remissions. Studies have shown improved survival and symptomatic control in patients with SM. Of great triumph, this has been achieved in an outpatient setting with apparent tolerable and minimal toxicity. The importance of molecular profiling is being demonstrated in administering combination therapies for SM with an associated haematological neoplasm (AHN), allowing more personalised and streamlined treatment regimes. This review focuses on current management strategies of SM, focusing on state-of-the-art directed therapies, the evidence behind their use with presentation of two clinical cases to highlight key messages.
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Affiliation(s)
- Isabel Farmer
- Department of Haematology, Guy's and St Thomas' NHS Foundation Trust, London, SE1 7EH, UK.
| | - Deepti H Radia
- Department of Haematology, Guy's and St Thomas' NHS Foundation Trust, London, SE1 7EH, UK.
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2
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Castells M, Giannetti MP, Hamilton MJ, Novak P, Pozdnyakova O, Nicoloro-SantaBarbara J, Jennings SV, Francomano C, Kim B, Glover SC, Galli SJ, Maitland A, White A, Abonia JP, Slee V, Valent P, Butterfield JH, Carter M, Metcalfe DD, Akin C, Lyons JJ, Togias A, Wheatley L, Milner JD. Mast cell activation syndrome: Current understanding and research needs. J Allergy Clin Immunol 2024; 154:255-263. [PMID: 38851398 DOI: 10.1016/j.jaci.2024.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 05/13/2024] [Accepted: 05/17/2024] [Indexed: 06/10/2024]
Abstract
Mast cell activation syndrome (MCAS) is a term applied to several clinical entities that have gained increased attention from patients and medical providers. Although several descriptive publications about MCAS exist, there are many gaps in knowledge, resulting in confusion about this clinical syndrome. Whether MCAS is a primary syndrome or exists as a constellation of symptoms in the context of known inflammatory, allergic, or clonal disorders associated with systemic mast cell activation is not well understood. More importantly, the underlying mechanisms and pathways that lead to mast cell activation in MCAS patients remain to be elucidated. Here we summarize the known literature, identify gaps in knowledge, and highlight research needs. Covered topics include contextualization of MCAS and MCAS-like endotypes and related diagnostic evaluations; mechanistic research; management of typical and refractory symptoms; and MCAS-specific education for patients and health care providers.
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Affiliation(s)
- Mariana Castells
- Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass.
| | - Matthew P Giannetti
- Division of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Matthew J Hamilton
- Division of Gastroenterology, Hepatology, and Endoscopy, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Peter Novak
- Department of Neurology, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Olga Pozdnyakova
- department of Pathology, Brigham and Women's Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | | | | | - Clair Francomano
- Medical and Molecular Genetics, Riley Children's Health, Indianapolis, Ind
| | - Brian Kim
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Sarah C Glover
- Gastroenterology & Hepatology, Tulane University School of Medicine, New Orleans, La
| | - Stephen J Galli
- Departments of Pathology and Immunology and Microbiology, and the Sean N. Parker Center for Allergy and Asthma Research, Stanford University School of Medicine, Stanford, Calif
| | - Anne Maitland
- Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY; Allergy and Immunology Services, Metrodora Institute, Salt Lake City, Utah
| | - Andrew White
- Division of Allergy and Immunology, Scripps Clinic, San Diego, Calif
| | - J Pablo Abonia
- Departent of Pediatrics, Cincinnati Children's Hospital, Cincinnati, Ohio
| | - Valerie Slee
- The Mast Cell Disease Society Inc, Sterling, Mass
| | - Peter Valent
- Department of Internal Medicine I, Division of Hematology and Hemostaseology, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria
| | - Joseph H Butterfield
- Division of Allergic Diseases and the Mayo Clinic Program for Mast Cell and Eosinophilic Disorders, Mayo Clinic, Rochester, Minn
| | - Melody Carter
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Dean D Metcalfe
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Cem Akin
- Division of Allergy and Clinical Immunology, University of Michigan, Ann Arbor, Mich
| | - Jonathan J Lyons
- Division of Allergy and Immunology, Department of Medicine, University of California-San Diego, La Jolla, Calif; Veterans Affairs San Diego Healthcare System, La Jolla, Calif
| | - Alkis Togias
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Lisa Wheatley
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md
| | - Joshua D Milner
- Division of Pediatric Allergy, Immunology and Rheumatology, NewYork-Presbyterian/Columbia University Irving Medical Center, New York, NY
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3
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McMurray JC, Pacheco CS, Schornack BJ, Sun X, Brunader JA, Scott AE, Ariza JS, Kou CTJ, Costantino RC, Pittman LM, Adams KE, Waters AM, Pryor EM, Lyons JJ, Metcalfe DD, Maric I, Boggs NA. Standardized indolent systemic mastocytosis evaluations across a health care system: implications for screening accuracy. Blood 2024; 144:408-419. [PMID: 38635793 DOI: 10.1182/blood.2023023347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/11/2024] [Accepted: 04/07/2024] [Indexed: 04/20/2024] Open
Abstract
ABSTRACT Timely diagnosis of systemic mastocytosis (SM) remains challenging because of care heterogeneity. We implemented a standardized approach for SM screening and diagnosis using a novel health care system-wide international screening registry. A retrospective analysis assessed rates of SM, cutaneous mastocytosis (CM), and molecular diagnoses before and 2 years after care standardization. The accuracy of individual and combined SM screening tests, basal serum tryptase (BST) ≥11.5 and ≥20.0 ng/mL, REMA ≥2, monomorphic maculopapular CM (MPCM), and elevated BST based upon tryptase genotype, was analyzed. Tryptase genotyping and high-sensitivity KIT p.D816V testing increased substantially 2 years after care standardization. SM diagnoses doubled from 47 to 94, and KIT p.D816V molecular diagnoses increased from 24 to 79. Mean BST and KIT p.D816V variant allele frequency values were significantly lower in patients diagnosed after standardization. Hereditary-alpha tryptasemia prevalence was increased in SM before care standardization (4/30 [13.3%]) but reflected the general population prevalence 2 years later at (5/76 [6.6%]). Elevated BST based upon genotype and BST ≥11.5 ng/mL had the highest sensitivities at 84.2% and 88.3%, respectively. The presence of monomorphic MPCM, elevated BST based upon tryptase genotype, and the combination of REMA ≥2 with elevated BST based upon tryptase genotype had specificities >90%. BST >20.0 ng/mL had low sensitivity and specificity and was not required to establish any indolent SM (ISM) diagnosis. Care standardization increased SM diagnosis rates, particularly in patients with low BSTs. Stratifying BST based upon genotype had the best overall sensitivity and specificity of any ISM screening test and improved the REMA score specificity.
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Affiliation(s)
- Jeremy C McMurray
- Allergy and Immunology Service, Walter Reed National Military Medical Center, Bethesda, MD
| | - Curtis S Pacheco
- Department of Internal Medicine, Brooke Army Medical Center, San Antonio, TX
| | - Brandon J Schornack
- Allergy and Immunology Service, Walter Reed National Military Medical Center, Bethesda, MD
| | - Xiaoping Sun
- Hematology Section, Department of Laboratory Medicine, National Institutes of Health, Bethesda, MD
| | - Janet A Brunader
- Immunization Healthcare Division, Defense Health Agency, Falls Church, VA
| | - Alexis E Scott
- Immunization Healthcare Division, Defense Health Agency, Falls Church, VA
| | - Juan S Ariza
- Department of Internal Medicine, Walter Reed National Military Medical Center, Bethesda, MD
| | - Chung-Ting J Kou
- Hematology and Oncology Service, Brooke Army Medical Center, San Antonio, TX
| | - Ryan C Costantino
- Enterprise Intelligence and Data Solutions Program Office, Program Executive Office, Defense Healthcare Management Systems, San Antonio, TX
| | - Luke M Pittman
- Allergy and Immunology Service, Walter Reed National Military Medical Center, Bethesda, MD
| | - Karla E Adams
- Department of Medicine, Allergy and Immunology Service, Wilford Hall Ambulatory Surgical Center, Lackland Air Force Base, San Antonio, TX
| | - Aubri M Waters
- Allergy and Immunology Service, Brooke Army Medical Center, San Antonio, TX
| | - Eric M Pryor
- Hematopathology Service, Department of Pathology, Walter Reed National Military Medical Center, Bethesda, MD
| | - Jonathan J Lyons
- Division of Allergy and Immunology, Department of Medicine, University of California San Diego, La Jolla, CA
- Veterans Affairs San Diego Health Care System, La Jolla, CA
| | - Dean D Metcalfe
- Mast Cell Biology Section, Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
| | - Irina Maric
- Hematology Section, Department of Laboratory Medicine, National Institutes of Health, Bethesda, MD
| | - Nathan A Boggs
- Allergy and Immunology Service, Walter Reed National Military Medical Center, Bethesda, MD
- Department of Medicine, Uniformed Services University, Bethesda, MD
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Kim DH, Jia F, Patel KP, Bose P, Wang SA, Bueso-Ramos C, Ok CY. Utility of KIT Mutations in Myeloid Neoplasms Without Documented Systemic Mastocytosis to Detect Hidden Mast Cells in Bone Marrow. CLINICAL LYMPHOMA, MYELOMA & LEUKEMIA 2024:S2152-2650(24)00266-0. [PMID: 39107203 DOI: 10.1016/j.clml.2024.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 07/03/2024] [Accepted: 07/11/2024] [Indexed: 08/09/2024]
Abstract
BACKGROUND KIT p.D816 mutation is strongly associated with systemic mastocytosis (SM). Next-generation sequencing (NGS) is now routinely performed in almost all bone marrow sample and KIT mutations are detected from patients who are not known or suspected to have SM. Therefore, we wanted to assess if KIT mutations in this patient population are associated with unsuspected SM. METHODS We searched NGS result in our institution with positive result for KIT mutation from patients with known/suspected myeloid neoplasms. Patients with previously documented history of systemic mastocytosis were excluded. Bone marrow biopsies from patients with KIT mutation were assessed with immunohistochemical stains for CD117 and mast cell tryptase (MST). RESULTS Bone marrow biopsies were assessed with immunohistochemical stains for CD117 and mast cell tryptase (n = 49). Most patients had acute myeloid leukemia (AML, n = 38) or chronic myelomonocytic leukemia (CMML, n = 6). Immunohistochemical stains for CD117 and tryptase were performed in all 49 patients. A total of 4 patients (8.2%) showed mast cell nodules where spindled shaped mast cells were present, meeting the WHO criteria for SM. All four patients had KIT p.D816V mutation and had high mutant allelic frequency (∼ 50%) except one patient (1%). CONCLUSION We discovered approximately 8% of patients who had myeloid neoplasms with unexpected KIT mutations fulfilled the diagnostic criteria for systemic mastocytosis after additional immunohistochemical studies. Our data support that application of additional immunohistochemical studies is recommended to identify underrecognized SM when KIT mutations are found by molecular assays.
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Affiliation(s)
- Do Hwan Kim
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Fuli Jia
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Keyur P Patel
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Prithviraj Bose
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Sa A Wang
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Carlos Bueso-Ramos
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Chi Young Ok
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX.
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5
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Moraly J, Rossignol J, Rouzaud C, Gabas T, Bouktit H, Lhermitte L, Canioni D, Fraitag S, Bruneau J, Barete S, Suarez F, Ballul T, Meni C, Polivka L, Terriou L, Launay D, Bouillet L, Gaudy-Marqueste C, Gousseff M, Le Mouel E, Neel A, Ranta D, Jaussaud R, Guilpain P, Frenzel L, Agopian J, Dubreuil P, Greco C, Dimicoli-Salazar S, Heiblig M, Gourguechon C, Tournilhac O, Javier RM, Castelain F, Cabrera Q, Gourin MP, Wierzbicka-Hainaut E, Torregrosa-Diaz JM, Bulai C, Lavigne C, Hoarau C, Arock M, Damaj G, Lortholary O, Hermine O. Efficacy and safety of mammalian target of rapamycin inhibitors in systemic mastocytosis: A nationwide French pilot study. Am J Hematol 2024; 99:1095-1102. [PMID: 38581211 DOI: 10.1002/ajh.27323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/28/2024] [Accepted: 03/04/2024] [Indexed: 04/08/2024]
Abstract
Systemic mastocytosis (SM) corresponds to a rare and heterogeneous spectrum of diseases characterized by the accumulation of atypical mast cells (MCs). Advanced mastocytosis (Adv-SM) is associated with poor survival; in contrast, patients with non-advanced SM (non-Adv-SM) usually have a normal life expectancy but may experience poor quality of life. Despite recent therapeutic progress including tyrosine kinase inhibitors, new treatment options are needed for refractory and/or intolerant patients with both severely symptomatic and Adv-SM. In vitro, the mTOR pathway is activated in MCs from patients bearing the KIT D816V mutation. Furthermore, rapamycin induces the apoptosis of KIT D816V MCs selectively. In this nationwide study, we report the outcomes of patients diagnosed with SM and treated with a mammalian target of rapamycin inhibitor (imTOR) within the French National Reference Center for mastocytosis (CEREMAST). All patients registered were relapsing, treatment-refractory, or ineligible for other cytoreductive therapy. Non-Adv-SM patients received imTOR as a monotherapy (rapamycin/everolimus), and Adv-SM patients received imTOR as a monotherapy or in combination with cytarabine. The objective response rate (ORR) in non-Adv-SM was 60% (partial response in 40% and major response in 20%), including reductions in skin involvement, mediator release symptoms, and serum tryptase. In the Adv-SM group, the ORR was 20% (including one major response and one partial response, both in patients with a KIT D816V mutation), which enabled a successful bridge to allogeneic stem cell transplantation in one patient. Our results suggest that imTOR treatment has potential benefits in patients with SM harboring a KIT D816V mutation.
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Affiliation(s)
- Josquin Moraly
- Infectious and Tropical Diseases Department, Necker-Pasteur Infectiology Center, Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Julien Rossignol
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- INSERM U1163, Imagine Institute, Paris-Cite University, Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Hematology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Claire Rouzaud
- Infectious and Tropical Diseases Department, Necker-Pasteur Infectiology Center, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Thomas Gabas
- Infectious and Tropical Diseases Department, Necker-Pasteur Infectiology Center, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Hassiba Bouktit
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Ludovic Lhermitte
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Laboratory of Onco-Hematology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Danielle Canioni
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Pathology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Sylvie Fraitag
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Pathology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Julie Bruneau
- Department of Pathology, Necker-Children's Hospital, AP-HP, Paris Centre University, Paris, France
| | - Stéphane Barete
- Department of Dermatology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - Felipe Suarez
- Department of Hematology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Thomas Ballul
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- INSERM U1163, Imagine Institute, Paris-Cite University, Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Hematology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Cécile Meni
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Dermatology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Laura Polivka
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- INSERM U1163, Imagine Institute, Paris-Cite University, Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Dermatology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Louis Terriou
- Department of Internal Medicine and Clinical Immunology, Claude Huriez Hospital, CHRU Lille, Lille, France
| | - David Launay
- Department of Internal Medicine and Clinical Immunology, Claude Huriez Hospital, CHRU Lille, Lille, France
| | - Laurence Bouillet
- Clinical Immunology/Internal Medicine Department, National Reference Center for Angioedema, Grenoble University Hospital, Grenoble, France
| | | | - Marie Gousseff
- Department of Internal Medicine, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - Edwige Le Mouel
- Department of Internal Medicine and Clinical Immunology, Rennes University Hospital, Rennes, France
| | - Antoine Neel
- Department of Internal Medicine, Hôtel-Dieu University Hospital, Nantes, France
| | - Dana Ranta
- Department of Hematology, Nancy University Hospital, Nancy, France
| | - Roland Jaussaud
- Department of Internal Medicine and Clinical Immunology, Nancy University Hospital, Vandoeuvre-lès-Nancy, France
| | - Philippe Guilpain
- Department of Internal Medicine-Multi-Organ Diseases, Saint-Eloi University Hospital, Montpellier University, Montpellier, France
| | - Laurent Frenzel
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- INSERM U1163, Imagine Institute, Paris-Cite University, Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Hematology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Julie Agopian
- INSERM, U1068, Centre de Recherche en Cancerologie de Marseille (CRCM), Paoli-Calmettes Institute, Marseille, France
| | - Patrice Dubreuil
- INSERM, U1068, Centre de Recherche en Cancerologie de Marseille (CRCM), Paoli-Calmettes Institute, Marseille, France
| | - Céline Greco
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Pain and Palliative Care Unit, Necker-Children's Hospital, AP-HP, Paris Centre University, Paris, France
| | | | - Mael Heiblig
- Department of Hematology, Lyon-Sud Hospital, Hospices Civils de Lyon, Pierre-Bénite, France
| | | | - Olivier Tournilhac
- Adult Clinical Hematology, CHU Clermont-Ferrand, INSERM CIC501, EA 7453 - Clermont Auvergne University, Clermont-Ferrand, France
| | - Rose-Marie Javier
- Department of Rheumatology, Strasbourg University Hospital, Strasbourg, France
| | - Florence Castelain
- Department of Dermatology, Allergology Unit, University Hospital of Besançon, Besançon, France
| | - Quentin Cabrera
- Department of Hematology, Sud Reunion University Hospital, Saint Pierre, La Réunion, France
| | | | | | | | - Cristina Bulai
- Department of Dermatology, Hôpital Larrey, CHU Toulouse, Toulouse, France
| | - Christian Lavigne
- Department of Internal Medicine and Clinical Immunology, University Hospital, Angers, France
| | - Cyrille Hoarau
- Department of Clinical Immunology and Allergology, Centre Hospitalier Régional Universitaire, Tours, France
| | - Michel Arock
- Laboratory of Hematology, Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - Gandhi Damaj
- Hematology Institute, Normandy University School of Medicine, Caen, France
| | - Olivier Lortholary
- Infectious and Tropical Diseases Department, Necker-Pasteur Infectiology Center, Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
| | - Olivier Hermine
- Reference Center for Mastocytosis (CEREMAST), Necker-Enfants Malades Hospital, AP-HP, Paris, France
- INSERM U1163, Imagine Institute, Paris-Cite University, Necker-Enfants Malades Hospital, AP-HP, Paris, France
- Department of Hematology, Necker-Enfants Malades Hospital, AP-HP, Paris, France
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6
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Yue Z, Wang Y, Li Z, Jin T, Sheng Y. Evaluation of Bioequivalence for Avapritinib Tablets in Chinese Participants Under Fasting Conditions Using a Reference-Scaled Average Bioequivalence Method. Clin Pharmacol Drug Dev 2024; 13:672-676. [PMID: 38523571 DOI: 10.1002/cpdd.1398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 02/26/2024] [Indexed: 03/26/2024]
Abstract
This study aimed to assess the bioequivalence of 2 avapritinib tablets formulations. A randomized, open-label, single-center trial was conducted on fasting, healthy Chinese participants. The study utilized a partial replicated design with 3 sequences and 3 periods. Participants were assigned to 1 of 3 sequences, with each sequence receiving the reference formulation twice and the test formulation once. Plasma samples were collected and analyzed to determine pharmacokinetic parameters. The bioequivalence of the 2 avapritinib formulations was assessed using reference-scaled average bioequivalence for the maximum plasma concentration (Cmax) and the average bioequivalence analysis for the area under the concentration-time curve (AUC). Out of 39 participants, 38 completed the study. For Cmax, the 1-sided 95% upper confidence interval (CI) bound from the scaled approach was -0.035 (<0) and the point estimate value was 0.958, falling inside the acceptance range of 0.8-1.25. For both the AUC over all concentrations measured (AUC0-t) and the AUC from time 0 to infinity (AUC0-inf), the 90% CIs of geometric mean ratios (0.87-1.01) also met the bioequivalence criteria of 0.8-1.25. Consequently, the study demonstrated that the 2 avapritinib formulations were bioequivalent under fasting conditions.
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Affiliation(s)
- Zenglian Yue
- CStone Pharmaceuticals (Suzhou) Co. Ltd., Suzhou, China
| | - Yin Wang
- CStone Pharmaceuticals (Suzhou) Co. Ltd., Suzhou, China
| | - Zeng Li
- CStone Pharmaceuticals (Suzhou) Co. Ltd., Suzhou, China
| | - Tao Jin
- Henan (ZhengZhou) ZhongHui Cardiovascular Hospital Phase I Clinical Center, Zhengzhou, China
| | - Yucheng Sheng
- CStone Pharmaceuticals (Suzhou) Co. Ltd., Suzhou, China
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7
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Giannetti MP, Nicoloro-SantaBarbara J, Godwin G, Middlesworth J, Espeland A, Douvas JL, Castells MC. Challenges in Drug and Hymenoptera Venom Hypersensitivity Diagnosis and Management in Mastocytosis. Diagnostics (Basel) 2024; 14:123. [PMID: 38247999 PMCID: PMC10814166 DOI: 10.3390/diagnostics14020123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/26/2023] [Accepted: 01/03/2024] [Indexed: 01/23/2024] Open
Abstract
Mastocytosis is a myeloproliferative neoplasm characterized by abnormal proliferation and activation of clonal mast cells typically bearing the KITD816V mutation. Symptoms manifest due to the release of bioactive mediators and the tissue infiltration by neoplastic mast cells. Mast cell activation symptoms include flushing, pruritus, urticaria, abdominal cramping, diarrhea, wheezing, neuropsychiatric symptoms, and anaphylaxis. Up to 50% of patients with mastocytosis report a history of provoked and unprovoked anaphylaxis, with Hymenoptera venom and drugs the most common culprits. NSAIDs, antibiotics, vaccines, perioperative medications, and radiocontrast media are often empirically avoided without evidence of reactions, depriving patients of needed medications and placing them at risk for unfavorable outcomes. The purpose of this review is to highlight the most common agents responsible for adverse drug reactions in patients with mastocytosis, with a review of current epidemiology, diagnosis, and management of drug hypersensitivity and Hymenoptera venom allergy.
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Affiliation(s)
- Matthew P. Giannetti
- Division of Allergy and Clinical Immunology, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Jennifer Nicoloro-SantaBarbara
- Harvard Medical School, Boston, MA 02115, USA
- Department of Psychiatry, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Grace Godwin
- Division of Allergy and Clinical Immunology, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Julia Middlesworth
- Division of Allergy and Clinical Immunology, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Andrew Espeland
- Division of Allergy and Clinical Immunology, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Julia L. Douvas
- Division of Allergy and Clinical Immunology, Brigham and Women’s Hospital, Boston, MA 02115, USA
| | - Mariana C. Castells
- Division of Allergy and Clinical Immunology, Brigham and Women’s Hospital, Boston, MA 02115, USA
- Harvard Medical School, Boston, MA 02115, USA
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8
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Veitch S, Radia DH. Recent Advances in the Therapeutic Management of Advanced Systemic Mastocytosis. Diagnostics (Basel) 2023; 14:80. [PMID: 38201389 PMCID: PMC10802166 DOI: 10.3390/diagnostics14010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 12/22/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
Advanced systemic mastocytosis (AdvSM) is a rare haematological neoplasm characterised by the accumulation of neoplastic mast cells (MCs) in various organs, resulting in organ dysfunction and reduced life expectancy. The subtypes include aggressive SM (ASM), SM with an associated haematological neoplasm (SM-AHN) and mast cell leukaemia (MCL). The gain of function KIT D816V mutation is present in most cases. The availability of tyrosine kinase inhibitors (TKIs) has revolutionised the treatment landscape for patients with this life-limiting disease. Patients are now able to achieve molecular remission, improved quality of life and improved overall survival. This review focuses on the targeted therapies currently available in clinical practice and within the clinical trial setting for AdvSM. This review also highlights possible future therapeutic targets and discusses therapeutic strategies for this multimutated and clinically heterogeneous disease.
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Affiliation(s)
- Scott Veitch
- Department of Haematology, Guy’s and St Thomas’ NHS Foundation Trust, London SE1 7EH, UK
| | - Deepti H. Radia
- Department of Haematology, Guy’s and St Thomas’ NHS Foundation Trust, London SE1 7EH, UK
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Dranitsaris G, Neuhalfen H, Peevyhouse A, Powell D, Miller K, Green T, Graff T. Diagnosis and management of systemic mastocytosis in a community hematology setting. J Oncol Pharm Pract 2023:10781552231221149. [PMID: 38151028 DOI: 10.1177/10781552231221149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
BACKGROUND Systemic mastocytosis (SM) is a rare and potentially severe hematologic disorder characterized by the clonal proliferation of mast cells (MCs) into various organs. The clinical manifestations of advanced SM are caused by the uncontrolled release of cytokines and vasoactive amines from MC and disease-induced organ dysfunction. Patients with SM typically present with symptoms such as flushing, pruritus, diarrhea, and headaches, but outcomes following active treatment have not been well characterized. In this study, the clinical characteristics, treatment patterns, and natural history of an SM patient cohort diagnosed and treated within a community hematology network in the United States is described. METHODS We identified 105 patients who were diagnosed and managed in one of 19 community hematology clinics up to an index date of 1 October 2022. Data collection included patient and disease characteristics, baseline biochemistry and hematology, SM diagnostic criteria being met, biomarkers tested, CD2 and/or CD25 expression in MCs as well as serum tryptase levels at presentation. Data abstraction also included supportive care drugs and anticancer therapy used, treatment response, reason for discontinuation, and overall survival by disease subtype. RESULTS A total of 105 SM patients were identified who met the inclusion criteria. The specific SM subtypes were indolent (47.6%), aggressive (9.5%), SM with an associated hematological neoplasm (19.0%), MC leukemia (1.9%), and subtype not documented (21.9%). Regardless of subtype, approximately 62% of patients did not receive SM-directed active therapy. Only 26% of patients with indolent systemic mastocytosis (ISM) received treatment compared to 65.6% with advanced subtypes. Relative to ISM cohort, the relative risk of death in patients with the advanced SM subtypes was approximately 15 times greater (hazard ratio = 15.0; 95% confidence interval: 3.3 to 66.5). CONCLUSIONS SM patients present with multiple underlying symptoms, within various disease subtypes that are difficult to diagnose in a timely manner. As a result, many patients do not receive active drug therapy for their disease. Therefore, greater disease awareness is required as well as new tools for earlier disease detection.
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Affiliation(s)
- George Dranitsaris
- Real World Data, Quality Cancer Care Alliance, Tacoma, WA, USA
- Department of Public Health, Syracuse University, NY, USA
| | | | | | | | - Kerri Miller
- Blueprint Medicines Corporation, Cambridge, MA, USA
| | - Teresa Green
- Blueprint Medicines Corporation, Cambridge, MA, USA
| | - Tara Graff
- Mission Cancer and Blood, Des Moines, IA, USA
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Veitch S, Radia DH. Mastocytosis demystified. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2023; 2023:396-406. [PMID: 38066855 PMCID: PMC10727054 DOI: 10.1182/hematology.2023000505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Mastocytosis is a rare, clinically heterogenous clonal hematological neoplasm. Over 95% of patients harbor the driver KIT D816V mutation resulting in mast cell (MC) accumulation and proliferation in various organs, leading to variable symptom manifestations that result from MC mediator release in patients with systemic mastocytosis (SM) and end-organ damage in those with advanced SM. The accurate diagnostic and clinical classification of patients with SM is vital to underpin appropriate treatment options and personalize therapy. This review evaluates the current diagnostic criteria, clinical classification, risk stratification, and therapeutic options available for adult patients with nonadvanced and advanced SM.
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Affiliation(s)
- Scott Veitch
- Haematology Department, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Deepti H Radia
- Haematology Department, Guy's and St Thomas' NHS Foundation Trust, London, UK
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Pyatilova P, Bernstein JA, Aulenbacher F, Borges MS, Dimitrijević S, Hoehn G, Maurer M, Kolkhir P, Siebenhaar F. The diagnostic workup for systemic mastocytosis differs from consensus recommendations: Results of a worldwide survey. World Allergy Organ J 2023; 16:100838. [PMID: 38020286 PMCID: PMC10661596 DOI: 10.1016/j.waojou.2023.100838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/04/2023] [Accepted: 10/17/2023] [Indexed: 12/01/2023] Open
Abstract
Objective Mastocytosis is a complex disorder affecting various organs. The diagnostic workup can be challenging and requires a multidisciplinary approach including the use of uncommon tests. To assess mastocytosis management around the globe, we conducted the first worldwide online survey for physicians. Methods A 21-item questionnaire was sent out to the members of the World Allergy Organization (WAO), the Global Allergy and Asthma European Network (GA2LEN), the Urticaria (UCARE) and Angioedema (ACARE) Centers of Reference and Excellence, the German Society of Allergology and Clinical Immunology (DGAKI), and the European Mast Cell and Basophil Research Network (EMBRN) in April-June 2021. Results Across 628 respondents from 79 countries 87.7% and 9.7% of physicians were allergists/clinical immunologists and/or dermatologists. Participating physicians were from all regions of the world (Europe, EU: 41.6%; North America, NA: 24.8%; Latin America, LA: 14.5%; Asia-Pacific, AP: 12.6%; and Africa/Middle East, AME: 6.5%). Only 2.2% of respondents worked at Specialized Mastocytosis Centers (SMCs) in North America or European Union. Physicians reported caring for 4 patients with mastocytosis per year, with higher numbers in European Union and Asia Pacific (5/year) compared to Latin America (2/year). Dermatologists and physicians who work at SMCs reported higher patient numbers (15/year and 80/year, respectively). Suspicion of mastocytosis in the allergology and dermatology community is commonly driven by anaphylaxis (82.9%), mastocytosis skin lesions (82.1%), or elevated tryptase levels (76.6%). Osteoporosis and gastrointestinal symptoms less often prompted suspicion of mastocytosis (21.4% and 49.9%, respectively). World Health Organisation (WHO)-diagnostic criteria and classification, regardless of the region, are only used by about 50% of physicians, with higher rates for SMCs (83.3%). Serum tryptase, bone marrow biopsy, and KIT D816V mutation analysis are included in the diagnostic workup by 90.9%, 61.5%, and 58.4% of physicians, respectively. The biggest challenges for the management of mastocytosis are the lack of more effective treatment options (51.1%), missing multidisciplinary networks (47.1%), and the lack of experience of specialists from other disciplines (39.0%). Conclusions The diagnostic workup for mastocytosis differs from consensus recommendations and varies between regions. This may be improved by establishing active multidisciplinary networks, increasing access to diagnostic procedures, consistently applying WHO criteria, and developing new Mastocytosis Centers of Reference and Excellence.
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Affiliation(s)
- Polina Pyatilova
- Institute of Allergology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany
| | - Jonathan A. Bernstein
- Allergy Section, Division of Immunology, Department of Internal Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH, USA
| | - Felix Aulenbacher
- Institute of Allergology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany
| | - Mario Sanchez Borges
- Allergy and Clinical Immunology Department, Centro Médico Docente La Trinidad and Clinica El Ávila, Caracas, Venezuela
| | | | - Gerard Hoehn
- Blueprint Medicines Corporation, Cambridge, MA, USA
| | - Marcus Maurer
- Institute of Allergology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany
| | - Pavel Kolkhir
- Institute of Allergology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany
| | - Frank Siebenhaar
- Institute of Allergology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Immunology and Allergology IA, Berlin, Germany
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Hernandez CL, Lynch DM, Golash AJ, Marquis K, Besz KM, Oxnard G, Rotow J, DeAngelo DJ, Castells M. Anaphylaxis and systemic mastocytosis controlled with KIT inhibitors in a patient with metastatic lung adenocarcinoma. Ann Allergy Asthma Immunol 2023; 131:668-670. [PMID: 37597693 DOI: 10.1016/j.anai.2023.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/21/2023]
Affiliation(s)
- Camellia L Hernandez
- Department of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Massachusetts.
| | - Donna-Marie Lynch
- Department of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Abby Jane Golash
- Department of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Kathleen Marquis
- Department of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Kylie Marie Besz
- Department of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Geoffrey Oxnard
- Department of Medical Oncology, Boston Medical Center, Boston, Massachusetts
| | - Julia Rotow
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Daniel J DeAngelo
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Mariana Castells
- Department of Allergy and Clinical Immunology, Brigham and Women's Hospital, Boston, Massachusetts
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Konantz M, Williams M, Merkel T, Reiss A, Dirnhofer S, Meyer SC, Valent P, George TI, Tzankov A, Hartmann K. Increased TIM-3 and galectin-9 serum levels in patients with advanced systemic mastocytosis. J Allergy Clin Immunol 2023; 152:1019-1024. [PMID: 37423405 DOI: 10.1016/j.jaci.2023.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/15/2023] [Accepted: 07/05/2023] [Indexed: 07/11/2023]
Abstract
BACKGROUND Systemic mastocytosis is characterized by expansion of clonal mast cells in various tissues. Several biomarkers with diagnostic and therapeutic potential have recently been characterized in mastocytosis, such as the serum marker tryptase and the immune checkpoint molecule PD-L1. OBJECTIVE We aimed to investigate whether serum levels of other checkpoint molecules are altered in systemic mastocytosis and whether these proteins are expressed in mastocytosis infiltrates in the bone marrow. METHODS Levels of different checkpoint molecules were analyzed in serum of patients with different categories of systemic mastocytosis and healthy controls and correlated to disease severity. Bone marrow biopsies from patients with systemic mastocytosis were stained to confirm expression. RESULTS Serum levels of TIM-3 and galectin-9 were increased in systemic mastocytosis, particularly in advanced subtypes, compared with healthy controls. TIM-3 and galectin-9 levels were also found to correlate with other biomarkers of systemic mastocytosis, such as serum tryptase and KIT D816V variant allele frequency in the peripheral blood. Moreover, we observed expression of TIM-3 and galectin-9 in mastocytosis infiltrates in bone marrow. CONCLUSIONS Together, our results demonstrate for the first time that serum levels of TIM-3 and galectin-9 are increased in advanced systemic mastocytosis. Moreover, TIM-3 and galectin-9 are expressed in bone marrow infiltrates in mastocytosis. These findings provide a rationale for exploring TIM-3 and galectin-9 as diagnostic markers and eventually therapeutic targets in systemic mastocytosis, particularly in advanced forms.
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Affiliation(s)
- Martina Konantz
- Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Margaret Williams
- ARUP Laboratories, Salt Lake City, Utah; University of Utah, Salt Lake City, Utah
| | - Tamara Merkel
- Division of Allergy, Department of Dermatology, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Antonia Reiss
- Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Stefan Dirnhofer
- Department of Pathology, Institute of Medical Genetics and Pathology, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Sara C Meyer
- Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland; Department of Hematology and Central Hematology Laboratory, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Peter Valent
- Division of Hematology and Hemostaseology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria; Ludwig Boltzmann Institute for Hematology and Oncology, Medical University of Vienna, Vienna, Austria
| | - Tracy I George
- ARUP Laboratories, Salt Lake City, Utah; University of Utah, Salt Lake City, Utah
| | - Alexandar Tzankov
- Department of Pathology, Institute of Medical Genetics and Pathology, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Karin Hartmann
- Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland; Division of Allergy, Department of Dermatology, University Hospital Basel and University of Basel, Basel, Switzerland.
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Metcalfe DD. Targeted Therapy for the Predominant Form of Mastocytosis. NEJM EVIDENCE 2023; 2:EVIDe2300089. [PMID: 38320134 DOI: 10.1056/evide2300089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Mast cells are present in all vascularized tissues, often associated with blood vessels, glandular structures, and nerves, and they tend to be more numerous in tissues that interface with the external environment, including the skin and gastrointestinal tract. These mast cells are involved in both innate and acquired immunity, as well as in other biologic processes, including wound healing. Mast cell numbers within tissues are remarkably consistent, although mast cell numbers somewhat increase in association with inflammation. Human mast cells have two principal receptors that when stimulated, lead to cellular activation.
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Affiliation(s)
- Dean D Metcalfe
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD
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