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Diral E, Furnari G, Bruno A, Greco R, Clerici D, Marktel S, Farina F, Mastaglio S, Vago L, Piemontese S, Peccatori J, Corti C, Bernardi M, Ciceri F, Lupo-Stanghellini MT. Sorafenib maintenance in FLT3-ITD mutated AML after allogeneic HCT: a real-world, single-center experience. Front Oncol 2024; 14:1391743. [PMID: 38978738 PMCID: PMC11228150 DOI: 10.3389/fonc.2024.1391743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 05/21/2024] [Indexed: 07/10/2024] Open
Abstract
Despite allogeneic hematopoietic stem cell transplant (allo-HCT) and the development of novel FLT3 inhibitors in both induction (midostaurin) and in the relapsed/refractory setting (gilteritinib), FLT3-ITD mutated leukemia (FLT3-ITD+ AML) still represents a challenge for modern hematology. Sorafenib is, to this date, the only inhibitor that demonstrated efficacy in improving both progression-free and overall survival as post-HCT maintenance therapy, even if its use in this setting has not been approved so far by regulatory agencies. The aim of our study was to evaluate the feasibility, safety, and efficacy of sorafenib maintenance in preventing early relapse in FLT3-ITD+ AML after HCT in a single-center experience. We analyzed 26 consecutive patients who received post-HCT 2-year maintenance with sorafenib at our center between 2017 and 2023. The median time from HCT to sorafenib start was 130 days, and the median dosage was 200 mg per day. Two (8%) and three (12%) patients discontinued maintenance due to toxicity and disease relapse, respectively. Eight (31%) patients terminated the 2-year maintenance and stopped sorafenib, while 13 patients are still under treatment. Overall, 21/26 patients (81%) are alive and in stable complete remission as outlined by a 2-year disease-free survival of 83.61%. No major long-term toxicity was reported at the last follow-up. Our real-world experience supports the use of sorafenib as a feasible and effective therapeutic option in post-HCT maintenance for FLT3-ITD+ AML.
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Affiliation(s)
- Elisa Diral
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Giulia Furnari
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Faculty of Medicine and Surgery, Vita-Salute San Raffaele University, Milan, Italy
| | - Alessandro Bruno
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Raffaella Greco
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Daniela Clerici
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Sarah Marktel
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Francesca Farina
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Sara Mastaglio
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Luca Vago
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Faculty of Medicine and Surgery, Vita-Salute San Raffaele University, Milan, Italy
| | - Simona Piemontese
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Jacopo Peccatori
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Consuelo Corti
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Massimo Bernardi
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Fabio Ciceri
- Hematology and Bone Marrow Transplantation Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
- Faculty of Medicine and Surgery, Vita-Salute San Raffaele University, Milan, Italy
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2
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Chen Z, Zheng S, Han J, Fu L, Fu J, Zhang Z, Hong P, Feng W. Molecular mechanisms of ferroptosis and its roles in leukemia. Front Oncol 2023; 13:1308869. [PMID: 38125948 PMCID: PMC10731040 DOI: 10.3389/fonc.2023.1308869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 11/24/2023] [Indexed: 12/23/2023] Open
Abstract
Cell death is a complex process required to maintain homeostasis and occurs when cells are damage or reach end of life. As research progresses, it is apparent that necrosis and apoptosis do not fully explain the whole phenomenon of cell death. Therefore, new death modalities such as autophagic cell death, and ferroptosis have been proposed. In recent years, ferroptosis, a new type of non-apoptotic cell death characterized by iron-dependent lipid peroxidation and reactive oxygen species (ROS) accumulation, has been receiving increasing attention. Ferroptosis can be involved in the pathological processes of many disorders, such as ischemia-reperfusion injury, nervous system diseases, and blood diseases. However, the specific mechanisms by which ferroptosis participates in the occurrence and development of leukemia still need to be more fully and deeply studied. In this review, we present the research progress on the mechanism of ferroptosis and its role in leukemia, to provide new theoretical basis and strategies for the diagnosis and treatment of clinical hematological diseases.
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Affiliation(s)
| | | | | | | | | | | | | | - Weiying Feng
- Department of Hematology, Shaoxing People’s Hospital (Shaoxing Hospital, Zhejiang University School of Medicine), Shaoxing, China
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3
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Morin S, Giannotti F, Mamez AC, Pradier A, Masouridi-Levrat S, Simonetta F, Chalandon Y. Real-world experience of sorafenib maintenance after allogeneic hematopoietic stem cell transplantation for FLT3-ITD AML reveals high rates of toxicity-related treatment interruption. Front Oncol 2023; 13:1095870. [PMID: 37007116 PMCID: PMC10050716 DOI: 10.3389/fonc.2023.1095870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/27/2023] [Indexed: 03/17/2023] Open
Abstract
Sorafenib significantly improves survival of FLT3-ITD mutated AML patients when used as a post-allogeneic HSCT maintenance. Importantly, clinical trials reported a low rate of toxicities requiring sorafenib discontinuation. The aim of our analysis was to evaluate the real-world experience in patients treated with post-allogeneic HSCT sorafenib maintenance therapy for FLT3-ITD AML with a particular focus on tolerability and toxicity-related treatment interruption. We conducted a single-center retrospective study on 30 FLT3-ITD AML patients undergoing allogeneic HSCT in complete remission between 2017 and 2020 and who received sorafenib maintenance. 26 patients (87%) experienced toxicities leading to dose reduction (n=9) or direct interruption (n=17). Average time on sorafenib was 125 days (range 1-765). Most common toxicities were skin, gastrointestinal, and hematologic. Among patients who had a dose reduction, 4 eventually interrupted the drug and 5 were able to continue. Among patients who interrupted sorafenib because of toxicities, 7 were re-challenged with good tolerance in 3 cases. Overall, 18 patients (60% of the entire cohort) definitively discontinued sorafenib because of toxicities. 14 patients were thereafter switched to midostaurin. Importantly, with a median follow-up of 12 months, the median overall survival was not reached suggesting a positive impact of sorafenib maintenance despite the high rates of treatment interruption. In conclusion, our real-world analysis reveals high rates of toxicity-related interruption of sorafenib maintenance after allogeneic HSCT. Interestingly, our results suggest the feasibility of re-challenging with sorafenib and/or of switching to other maintenance approaches in case of intolerance.
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Affiliation(s)
- Sarah Morin
- Division of Hematology, Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
- *Correspondence: Sarah Morin, ; Yves Chalandon,
| | - Federica Giannotti
- Division of Hematology, Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
| | - Anne-Claire Mamez
- Division of Hematology, Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
| | - Amandine Pradier
- Division of Hematology, Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
| | | | - Federico Simonetta
- Division of Hematology, Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
- Translational Research Center for Oncohematology, Department of Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Yves Chalandon
- Division of Hematology, Department of Oncology, Geneva University Hospitals, Geneva, Switzerland
- Translational Research Center for Oncohematology, Department of Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- *Correspondence: Sarah Morin, ; Yves Chalandon,
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4
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Fei X, Zhang S, Gu J, Wang J. FLT3
inhibitors as maintenance therapy post allogeneic hematopoietic stem cell transplantation in acute myeloid leukemia patients with
FLT3
mutations: A meta‐analysis. Cancer Med 2022; 12:6877-6888. [PMID: 36411731 PMCID: PMC10067110 DOI: 10.1002/cam4.5480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2022] [Revised: 08/31/2022] [Accepted: 11/13/2022] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Acute myeloid leukemia (AML) patients with a Fms-like tyrosine kinase 3 (FLT3) mutation have a high incidence of relapse despite allogeneic hematopoietic stem cell transplantation (allo-HSCT) and a subsequent poor prognosis. FLT3 inhibitors (FLT3i) have been suggested to reduce the post-transplant relapse risk in recent studies. As more evidence is accumulated, we perform the present meta-analysis to assess the efficacy and safety of FLT3i as post-transplant maintenance therapy in AML patients. METHODS Literature search was performed in public databases from inception to December 31, 2021. Overall survival (OS), relapse-free survival (RFS), cumulative incidence of relapse (CIR), non-relapse mortality (NRM), graft-versus-host disease (GVHD) and adverse events were compared between FLT3i and control groups. Pooled hazard ratio (HR) or relative risk (RR) with corresponding 95% confidence interval (CI) were calculated. RESULTS We identified 12 eligible studies with 2282 FLT3-mutated AML patients who had received HSCT. There was no between-study heterogeneity and a fix-effect model was used. Post-transplant FLT3i maintenance significantly prolonged OS (HR = 0.41, 95%CI: 0.32-0.52, p < 0.001) and RFS (HR = 0.39, 95%CI 0.31-0.50, p < 0.001), and reduced CIR (HR = 0.31, 95%CI 0.20-0.46, p < 0.001) as compared with control. There were no significant risk differences in NRM (RR = 0.69, 95%CI 0.41-1.17, p = 0.169), acute GVHD (RR = 1.17, 95%CI 0.93-1.47, p = 0.175), chronic GVHD (RR = 1.31, 95%CI 0.91-1.39, p = 0.276) and grade ≥3 adverse events between both groups, except for skin toxicity (RR = 5.86, 95%CI 1.34-25.57, p = 0.019). CONCLUSION Post-transplant FLT3i maintenance can improve survival and reduce relapse in FLT3-mutated AML patients and is tolerable.
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Affiliation(s)
- Xinhong Fei
- Department of Hematology Aerospace Center Hospital Beijing China
| | - Shuqin Zhang
- Department of Hematology Aerospace Center Hospital Beijing China
| | - Jiangying Gu
- Department of Hematology Aerospace Center Hospital Beijing China
| | - Jingbo Wang
- Department of Hematology Aerospace Center Hospital Beijing China
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5
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Aydin S, Passera R, Scaldaferri M, Dellacasa CM, Poggiu M, Cattel F, Zallio F, Brunello L, Giaccone L, Dogliotti I, Busca A. Sorafenib maintenance after hematopoietic stem cell transplantation improves outcome of FLT3-ITD-mutated acute myeloid leukemia. Int J Hematol 2022; 116:883-891. [PMID: 35943684 PMCID: PMC9668769 DOI: 10.1007/s12185-022-03427-4] [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: 04/19/2022] [Revised: 07/20/2022] [Accepted: 07/20/2022] [Indexed: 11/30/2022]
Abstract
In a retrospective analysis, 21 acute myeloid leukemia patients receiving single-agent sorafenib maintenance therapy in complete remission (CR) after hematopoietic stem cell transplantation (HSCT) were compared with a control group of 22 patients without maintenance. Sorafenib was initiated a median of 3 months (IQR: 2.3–3.5) after allogeneic HSCT with a median daily dosage of 400 mg (range: 200–800) orally, and lasted a median of 11.3 months (IQR: 3.3–24.4). No significant increase in graft versus host disease or toxicity was observed. Adverse events were reversible with dose adjustment or temporary discontinuation in 19/19 cases. With a median follow-up of 34.7 months (IQR: 16.9–79.5), sorafenib maintenance significantly improved cumulative incidence of relapse (p = 0.028) as well as overall survival (OS) (p = 0.016), especially in patients undergoing allogeneic HSCT in CR1 (p < 0.001). In conclusion, sorafenib maintenance after allogeneic HSCT is safe and may improve cumulative incidence of relapse and OS in FLT3–ITD-mutated AML.
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Affiliation(s)
- Semra Aydin
- Department of Oncology, Hematology, Immuno-Oncology and Rheumatology, University Hospital of Bonn, Venusberg-Campus 1, 53127, Bonn, Germany. .,Department of Oncology, Hematology, A.O.U. Città Della Salute e Della Scienza, Turin, Italy.
| | - Roberto Passera
- Department of Medical Sciences, A.O.U. Città Della Salute e Della Scienza, University of Torino, Turin, Italy
| | - Matilde Scaldaferri
- S.C. Clinical Pharmacology, A.O.U. Città Della Salute e Della Scienza, Turin, Italy
| | - Chiara Maria Dellacasa
- Department of Oncology, SSD Stem Cell Transplant Center, A.O.U. Città Della Salute e Della Scienza, Turin, Italy
| | - Marco Poggiu
- S.C. Clinical Pharmacology, A.O.U. Città Della Salute e Della Scienza, Turin, Italy
| | - Francesco Cattel
- S.C. Clinical Pharmacology, A.O.U. Città Della Salute e Della Scienza, Turin, Italy
| | - Francesco Zallio
- Department of Hematology, SS Antonio & Biagio and C. Arrigo Hospital, Alessandria, Italy
| | - Lucia Brunello
- Department of Hematology, SS Antonio & Biagio and C. Arrigo Hospital, Alessandria, Italy
| | - Luisa Giaccone
- Department of Oncology, SSD Stem Cell Transplant Center, A.O.U. Città Della Salute e Della Scienza, Turin, Italy
| | - Irene Dogliotti
- Department of Oncology, SSD Stem Cell Transplant Center, A.O.U. Città Della Salute e Della Scienza, Turin, Italy
| | - Alessandro Busca
- Department of Oncology, SSD Stem Cell Transplant Center, A.O.U. Città Della Salute e Della Scienza, Turin, Italy
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6
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Kiguchi T, Yamaguchi M, Takezako N, Miyawaki S, Masui K, Ihara Y, Hirota M, Shimofurutani N, Naoe T. Efficacy and safety of Wilms' tumor 1 helper peptide OCV-501 in elderly patients with acute myeloid leukemia: a multicenter, randomized, double-blind, placebo-controlled phase 2 trial. Cancer Immunol Immunother 2021; 71:1419-1430. [PMID: 34677647 DOI: 10.1007/s00262-021-03074-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 09/28/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE Complete remission (CR) of acute myeloid leukemia (AML) in elderly patients has a short duration, and there is no suitable post-remission therapy. We explored the role of the Wilms' tumor 1 helper peptide OCV-501 to prevent recurrence after remission. METHODS This placebo-controlled phase 2 study was designed to evaluate accurately the efficacy and immunogenicity of OCV-501 in elderly AML patients. Elderly AML patients who achieved first CR were randomly allocated to receive either OCV-501 (N = 69) or placebo (N = 65) once a week for eight weeks and then every two weeks until week 104. The primary endpoint was disease-free survival (DFS). RESULTS Nineteen (27.5%) patients in the OCV-501 group and 23 (35.4%) patients in the placebo group completed the study without relapse. The median DFS in the OCV-501 and placebo groups was 12.1 and 8.4 months, respectively (p = 0.7671, hazard ratio [95% confidence interval]: 0.933 [0.590, 1.477]). The major drug adverse reactions were injection-site reactions. Although treatment with OCV-501 did not prolong DFS for elderly AML patients, post hoc analysis found that immune responders to OCV-501 whose specific IgG was > 10,000 ng/mL (N = 16) and whose WT1-specific interferon-γ response was > 10 pg/mL (N = 26) had significantly longer overall survival compared with placebo. CONCLUSIONS The placebo-controlled design of this study and quantitative immunological monitoring provides new insight into the relationship between peptide-induced immune responses and survival, suggesting future perspectives for cancer immunotherapy.
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Affiliation(s)
| | | | - Naoki Takezako
- National Hospital Organization Disaster Medical Center of Japan, Tokyo, Japan
| | | | | | | | | | | | - Tomoki Naoe
- National Hospital Organization Nagoya Medical Center, Nagoya, Japan
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7
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Hanauer DA, Barnholtz-Sloan JS, Beno MF, Del Fiol G, Durbin EB, Gologorskaya O, Harris D, Harnett B, Kawamoto K, May B, Meeks E, Pfaff E, Weiss J, Zheng K. Electronic Medical Record Search Engine (EMERSE): An Information Retrieval Tool for Supporting Cancer Research. JCO Clin Cancer Inform 2021; 4:454-463. [PMID: 32412846 PMCID: PMC7265780 DOI: 10.1200/cci.19.00134] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
PURPOSE The Electronic Medical Record Search Engine (EMERSE) is a software tool built to aid research spanning cohort discovery, population health, and data abstraction for clinical trials. EMERSE is now live at three academic medical centers, with additional sites currently working on implementation. In this report, we describe how EMERSE has been used to support cancer research based on a variety of metrics. METHODS We identified peer-reviewed publications that used EMERSE through online searches as well as through direct e-mails to users based on audit logs. These logs were also used to summarize use at each of the three sites. Search terms for two of the sites were characterized using the natural language processing tool MetaMap to determine to which semantic types the terms could be mapped. RESULTS We identified a total of 326 peer-reviewed publications that used EMERSE through August 2019, although this is likely an underestimation of the true total based on the use log analysis. Oncology-related research comprised nearly one third (n = 105; 32.2%) of all research output. The use logs showed that EMERSE had been used by multiple people at each site (nearly 3,500 across all three) who had collectively logged into the system > 100,000 times. Many user-entered search queries could not be mapped to a semantic type, but the most common semantic type for terms that did match was “disease or syndrome,” followed by “pharmacologic substance.” CONCLUSION EMERSE has been shown to be a valuable tool for supporting cancer research. It has been successfully deployed at other sites, despite some implementation challenges unique to each deployment environment.
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Affiliation(s)
- David A Hanauer
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI
| | - Jill S Barnholtz-Sloan
- Case Western Reserve University School of Medicine, Cleveland, OH.,Cleveland Institute for Computational Biology, Cleveland, OH
| | - Mark F Beno
- Case Western Reserve University School of Medicine, Cleveland, OH.,Cleveland Institute for Computational Biology, Cleveland, OH
| | - Guilherme Del Fiol
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT
| | - Eric B Durbin
- Markey Cancer Center, UK HealthCare, Lexington, KY.,Division of Biomedical Informatics, University of Kentucky, Lexington, KY
| | - Oksana Gologorskaya
- Clinical and Translational Science Institute, University of California San Francisco, San Francisco, CA
| | - Daniel Harris
- Markey Cancer Center, UK HealthCare, Lexington, KY.,Division of Biomedical Informatics, University of Kentucky, Lexington, KY
| | - Brett Harnett
- Department of Biomedical Informatics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Kensaku Kawamoto
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT
| | - Benjamin May
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY
| | - Eric Meeks
- Clinical and Translational Science Institute, University of California San Francisco, San Francisco, CA
| | - Emily Pfaff
- North Carolina Translational and Clinical Sciences Institute, University of North Carolina School of Medicine, Chapel Hill, NC
| | - Janie Weiss
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY
| | - Kai Zheng
- Department of Informatics, University of California, Irvine, CA
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8
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Miura K, Iriyama N, Hatta Y, Takei M. Personalized patient care with aggressive hematological malignancies in non-responders to first-line treatment. EXPERT REVIEW OF PRECISION MEDICINE AND DRUG DEVELOPMENT 2021. [DOI: 10.1080/23808993.2021.1903314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Katsuhiro Miura
- Tumor Center, Nihon University Itabashi Hospital, 173-8610, Itabashi city, Japan
- Department of Hematology and Rheumatology, Nihon University School of Medicine, 173-8610, Itabashi city, Tokyo, Japan
| | - Noriyoshi Iriyama
- Department of Hematology and Rheumatology, Nihon University School of Medicine, 173-8610, Itabashi city, Tokyo, Japan
| | - Yoshihiro Hatta
- Department of Hematology and Rheumatology, Nihon University School of Medicine, 173-8610, Itabashi city, Tokyo, Japan
| | - Masami Takei
- Department of Hematology and Rheumatology, Nihon University School of Medicine, 173-8610, Itabashi city, Tokyo, Japan
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Choi S, Kim BK, Ahn HY, Hong KT, Choi JY, Shin HY, Kang HJ. Outcomes of pediatric acute myeloid leukemia patients with FLT3-ITD mutations in the pre-FLT3 inhibitor era. Blood Res 2020; 55:217-224. [PMID: 33232940 PMCID: PMC7784129 DOI: 10.5045/br.2020.2020127] [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: 06/04/2020] [Revised: 09/29/2020] [Accepted: 10/16/2020] [Indexed: 11/27/2022] Open
Abstract
Background Acute myeloid leukemia (AML) with internal tandem duplication in FMS-like tyrosine kinase 3 (FLT3-ITD) is associated with poor outcomes. This study aimed to analyze the outcomes of pediatric AML patients with FLT3-ITD mutations in the pre-FLT3 inhibitor era. Methods We retrospectively reviewed and identified 18 patients diagnosed with non-M3 AML with FLT3-ITD mutations at Seoul National University Children’s Hospital between May 2008 and August 2019. Results The median age was 13 years (range, 6‒19 yr). The median follow-up time was 43 months (range, 6‒157 mo). Fourteen patients received BH-AC-based (N4-Behenoy1-1-b-D-arabinofuranosy1cytosine) and 4 received cytarabine-based induction chemotherapy. Complete remission (CR) was achieved in 72.2% of the patients after the first induction chemotherapy and 80% of the patients achieved CR after salvage therapy. The overall CR rate was 94% (17/18 patients). These 17 patients underwent hematopoietic stem cell transplantation (9 matched unrelated donors, 5 matched related donors, and 3 haploidentical donors). Relapse occurred in 22% of the patients. Event free survival and overall survival rates were 53.8±12.1% and 53.6±12.1%, respectively, and they were not significantly different according to the type of induction chemotherapy (P=0.690) or the type of donor (P=0.102). Conclusion This study outlines the outcomes of pediatric AML patients with FLT3-ITD-mutations in one institution over a decade. Outcomes were significantly improved in this study compared to our previous report in 2004, where RFS and EFS were 0%. This study can provide baseline data for pediatric patients in the pre-FLT3 inhibitor era.
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Affiliation(s)
- Sujin Choi
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea
| | - Bo Kyung Kim
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea.,Seoul National University Cancer Research Institute, Seoul, Korea
| | - Hong Yul Ahn
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea.,Seoul National University Cancer Research Institute, Seoul, Korea
| | - Kyung Taek Hong
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea.,Seoul National University Cancer Research Institute, Seoul, Korea
| | - Jung Yoon Choi
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea.,Seoul National University Cancer Research Institute, Seoul, Korea
| | - Hee Young Shin
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea.,Seoul National University Cancer Research Institute, Seoul, Korea
| | - Hyoung Jin Kang
- Department of Pediatrics, Seoul National University College of Medicine, Seoul National University Children's Hospital, Seoul, Korea.,Seoul National University Cancer Research Institute, Seoul, Korea.,Wide River Institute of Immunology, Hongcheon, Korea
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10
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Tyrosine kinase inhibitors for acute myeloid leukemia: A step toward disease control? Blood Rev 2020; 44:100675. [DOI: 10.1016/j.blre.2020.100675] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 01/17/2020] [Accepted: 02/11/2020] [Indexed: 12/24/2022]
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11
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Shi W, Jin W, Xia L, Hu Y. Novel agents targeting leukemia cells and immune microenvironment for prevention and treatment of relapse of acute myeloid leukemia after allogeneic hematopoietic stem cell transplantation. Acta Pharm Sin B 2020; 10:2125-2139. [PMID: 32837873 PMCID: PMC7326461 DOI: 10.1016/j.apsb.2020.06.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/27/2020] [Accepted: 06/05/2020] [Indexed: 12/20/2022] Open
Abstract
Relapse remains the worst life-threatening complications after allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with acute myeloid leukemia (AML), whose prognosis has been historically dismal. Given the rapid development of genomics and immunotherapies, the interference strategies for AML recurrence have been changing these years. More and more novel targeting agents that have received the U.S. Food and Drug Administration (FDA) approval for de novo AML treatment have been administrated in the salvage or maintenance therapy of post-HSCT relapse. Targeted strategies that regulate the immune microenvironment of and optimize the graft versus leukemia (GVL) effect of immune cells are gradually improved. Such agents not only have been proven to achieve clinical benefits from a single drug, but if combined with classic therapies, can significantly improve the poor prognosis of AML patients who relapse after allo-HSCT. This review will focus on currently available and promising upcoming agents and also discuss the challenges and limitations of targeted therapies in the allogeneic hematopoietic stem cell transplantation community.
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Affiliation(s)
- Wei Shi
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
| | - Weiwei Jin
- Department of Cardiovascular, Optical Valley School District, Hubei Provincial Hospital of Traditional Chinese Medicine, Wuhan 430061, China
- Hubei Province Academy of Traditional Chinese Medicine, Wuhan 430074, China
| | - Linghui Xia
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yu Hu
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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12
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DeWolf S, Tallman MS. How I treat relapsed or refractory AML. Blood 2020; 136:1023-1032. [PMID: 32518943 PMCID: PMC7453152 DOI: 10.1182/blood.2019001982] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 04/28/2020] [Indexed: 12/15/2022] Open
Abstract
Treatment of relapsed or refractory acute myeloid leukemia (AML) has presented challenges for hematologists for decades. Despite numerous clinical studies, outcomes are consistently disappointing with 5-year overall survival rates of ∼10%. Allogeneic hematopoietic cell transplantation at the time of second complete remission remains the only reliable option with curative potential. However, recent approval of several new agents has transformed treatment paradigms that had been in place for almost half a century in AML. This new therapeutic landscape provides the opportunity to revisit the approach to relapsed or refractory AML. Through illustrative cases, we describe our approach, which increasingly relies on specific disease biology. We focus on treatment outside of the context of clinical trials because such trials are not available in most parts of the world. Primarily, we consider age, fitness to tolerate intensive chemotherapy, remission duration, and presence of a targetable mutation to guide treatment. The coming years will inevitably bring new targets and agents that may prove most effective when combined with each other and/or chemotherapy. Future studies are needed to determine how best to implement this evolving armamentarium of treatment options, to elucidate mechanisms of resistance, and to continue the pursuit of novel drug discovery.
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Affiliation(s)
- Susan DeWolf
- Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; and
| | - Martin S Tallman
- Leukemia Service, Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY; and
- Leukemia Service, Department of Medicine, Weill Cornell Medical College, New York, NY
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13
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Park M, Vaikari VP, Lam AT, Zhang Y, MacKay JA, Alachkar H. Anti-FLT3 nanoparticles for acute myeloid leukemia: Preclinical pharmacology and pharmacokinetics. J Control Release 2020; 324:317-329. [PMID: 32428520 PMCID: PMC7473778 DOI: 10.1016/j.jconrel.2020.05.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 05/13/2020] [Accepted: 05/15/2020] [Indexed: 12/20/2022]
Abstract
FLT3 receptor is an important therapeutic target in acute myeloid leukemia due to high incidence of mutations associated with poor clinical outcome. Targeted therapies against the FLT3 receptor, including small-molecule FLT3 tyrosine kinase inhibitors (TKIs) and anti-FLT3 antibodies, have demonstrated promising preclinical and even clinical efficacy. Yet, even with the current FDA approval for two FLT3 inhibitors, these modalities were unable to cure AML or significantly extend the lives of patients with a common mutation called FLT3-ITD. While FLT3 is a viable target, the approaches to inhibit its activity were inadequate. To develop a new modality for targeting FLT3, our team engineered an α-FLT3-A192 fusion protein composed of a single chain variable fragment antibody conjugated with an elastin-like polypeptide. These fusion proteins assemble into multi-valent nanoparticles with excellent stability and pharmacokinetic properties as well as in vitro and in vivo pharmacological activity in cellular and xenograft murine models of AML. In conclusion, α-FLT3-A192 fusions appear to be a viable new modality for targeting FLT3 in AML and warrant further preclinical development to bring it into the clinic.
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Affiliation(s)
- Mincheol Park
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA 90089, United States
| | - Vijaya Pooja Vaikari
- Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, CA 90089, United States
| | - Albert T Lam
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA 90089, United States
| | - Yong Zhang
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA 90089, United States; USC Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90089, United States; Department of Chemistry, Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, CA 90089, United States; Research Center for Liver Diseases, University of Southern California, Los Angeles, CA 90089, United States
| | - John Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA 90089, United States; Department of Ophthalmology, USC Roski Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, United States; Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, United States
| | - Houda Alachkar
- Department of Clinical Pharmacy, School of Pharmacy, University of Southern California, Los Angeles, CA 90089, United States; USC Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90089, United States.
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14
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Shi J, Cao L, Luo Y, Zhao Y, Tan Y, Yu J, Lai X, Zhu Y, Hu Y, He J, Sun J, Zheng W, Wei G, Huang H. Maintenance sorafenib is superior to prophylactic donor lymphocyte infusion at improving the prognosis of acute myeloid leukemia with FMS-like tyrosine kinase 3 internal tandem duplication after allogeneic hematopoietic stem cell transplantation. Bone Marrow Transplant 2020; 56:293-296. [PMID: 32753705 DOI: 10.1038/s41409-020-01015-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 07/15/2020] [Accepted: 07/24/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Jimin Shi
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Liqin Cao
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Yi Luo
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Yanmin Zhao
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Yamin Tan
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Jian Yu
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Xiaoyu Lai
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Yuanyuan Zhu
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Yongxian Hu
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Jingsong He
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Jie Sun
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Weiyan Zheng
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - Guoqing Wei
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.,Institute of Hematology, Zhejiang University, Hangzhou, China.,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China.,Stem Cell Institute, Zhejiang University, Hangzhou, China
| | - He Huang
- Bone Marrow Transplantation Center, the First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. .,Institute of Hematology, Zhejiang University, Hangzhou, China. .,Zhejiang Province Engineering Laboratory for Stem Cell and Immunotherapy, Hangzhou, China. .,Stem Cell Institute, Zhejiang University, Hangzhou, China.
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15
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Culos KA, Gatwood KS, Byrne M. Maintenance Strategies After Hematopoietic Cell Transplantation. Pharmacotherapy 2020; 40:727-740. [PMID: 32343426 DOI: 10.1002/phar.2407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hematopoietic cell transplantation (HCT) is an essential component of potentially curative therapy for patients with hematologic malignancies. High-dose chemotherapy with autologous (auto) stem cell rescue is used to overcome chemoresistance in multiple myeloma, non-Hodgkin lymphoma, and Hodgkin lymphoma. Alternatively, poor-risk acute leukemias rely on the graft versus leukemia effect of allogeneic (allo) products. Long-term remissions are feasible with both auto- and allo-HCT; however, disease relapse is the leading cause of death after HCT for many patients. In recognition of this, novel therapies are being investigated in the upfront, relapsed/refractory, and post-HCT maintenance settings to deepen response and maintain disease control. To date, the most robust data to support this approach are in multiple myeloma, where post-transplant maintenance therapy has improved clinical outcomes. In Hodgkin lymphoma, patients with high-risk features may benefit from post-auto-HCT vedotin (BV) regardless of pre-HCT BV exposure. Apart from mantle cell lymphoma, where rituximab maintenance is generally accepted, post-auto-HCT maintenance in other forms of NHL is less established. In patients who undergo allo-HCT, the utilization of maintenance therapy is an important component of improving post-HCT outcomes, however, an individualized approach that considers patient factors such as residual toxicity from HCT, an immature graft with poor graft function, infection, and graft-versus-host disease create a complex environment for aggressive interventions. Initiation of directed agents in patients with identified mutations prior to allo-HCT, including FLT3 in acute myeloid leukemia and Philadelphia chromosome in acute lymphoid leukemia have generally improved post-HCT outcomes. Ongoing studies are exploring the safety and efficacy of additional maintenance strategies post-allo-HCT in an effort to further improve post-HCT outcomes.
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Affiliation(s)
- Kathryn A Culos
- Department of Pharmacy, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Katie S Gatwood
- Department of Pharmacy, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Michael Byrne
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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16
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The role of small molecule Flt3 receptor protein-tyrosine kinase inhibitors in the treatment of Flt3-positive acute myelogenous leukemias. Pharmacol Res 2020; 155:104725. [DOI: 10.1016/j.phrs.2020.104725] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 02/24/2020] [Indexed: 02/08/2023]
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17
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Fiorentini A, Capelli D, Saraceni F, Menotti D, Poloni A, Olivieri A. The Time Has Come for Targeted Therapies for AML: Lights and Shadows. Oncol Ther 2020; 8:13-32. [PMID: 32700072 PMCID: PMC7359996 DOI: 10.1007/s40487-019-00108-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Indexed: 12/20/2022] Open
Abstract
Acute myeloid leukemia (AML) is a complex disease characterized by genetic and clinical heterogeneity and high mortality. After 40 years during which the standard of care for patients evolved very little, the therapeutic landscape has recently seen rapid changes, with the approval of eight new drugs by the Food and Drug Administration (FDA) within the last 2 years, providing new opportunities, as well as new challenges, for treating clinicians. These therapies include FLT3 inhibitors midostaurin and gilteritinib, CPX-351 (liposomal cytarabine and daunorubicin), gemtuzumab ozogamicin (GO, anti-CD33 monoclonal antibody conjugated with calicheamicin), IDH1/IDH2 inhibitors ivosidenib and enasidenib, Hedgehog inhibitor glasdegib, and BCL-2 inhibitor venetoclax. In this review, we summarize currently available data on these new drugs and discuss the rapidly evolving therapeutic armamentarium for AML, focusing on targeted therapies.
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Affiliation(s)
- Alessandro Fiorentini
- Hematology Department and Stem Cell Transplant Unit, Università Politecnica delle Marche, Ospedali Riuniti di Ancona, Ancona, Italy
| | - Debora Capelli
- Hematology Department and Stem Cell Transplant Unit, Università Politecnica delle Marche, Ospedali Riuniti di Ancona, Ancona, Italy
| | - Francesco Saraceni
- Hematology Department and Stem Cell Transplant Unit, Università Politecnica delle Marche, Ospedali Riuniti di Ancona, Ancona, Italy
| | - Diego Menotti
- Hematology Department and Stem Cell Transplant Unit, Università Politecnica delle Marche, Ospedali Riuniti di Ancona, Ancona, Italy
| | - Antonella Poloni
- Hematology Department and Stem Cell Transplant Unit, Università Politecnica delle Marche, Ospedali Riuniti di Ancona, Ancona, Italy
| | - Attilio Olivieri
- Hematology Department and Stem Cell Transplant Unit, Università Politecnica delle Marche, Ospedali Riuniti di Ancona, Ancona, Italy.
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18
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Zhang C, Lam SSY, Leung GMK, Tsui SP, Yang N, Ng NKL, Ip HW, Au CH, Chan TL, Ma ESK, Yip SF, Lee HKK, Lau JSM, Luk TH, Li W, Kwong YL, Leung AYH. Sorafenib and omacetaxine mepesuccinate as a safe and effective treatment for acute myeloid leukemia carrying internal tandem duplication of Fms-like tyrosine kinase 3. Cancer 2019; 126:344-353. [PMID: 31580501 DOI: 10.1002/cncr.32534] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 08/16/2019] [Accepted: 08/28/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND Omacetaxine mepesuccinate (OME) has antileukemic effects against acute myeloid leukemia (AML) carrying an internal tandem duplication of Fms-like tyrosine kinase 3 (FLT3-ITD). A phase 2 clinical trial was conducted to evaluate a combination treatment of sorafenib and omacetaxine mepesuccinate (SOME). METHODS Relapsed or refractory (R/R) or newly diagnosed patients were treated with sorafenib (200-400 mg twice daily) and OME (2 mg daily) for 7 (first course) or 5 days (second course onward) every 21 days until disease progression or allogeneic hematopoietic stem cell transplantation (HSCT). The primary endpoint was composite complete remission, which was defined as complete remission (CR) plus complete remission with incomplete hematologic recovery (CRi). Secondary endpoints were leukemia-free survival (LFS) and overall survival (OS). RESULTS Thirty-nine R/R patients and 5 newly diagnosed patients were recruited. Among the R/R patients, 28 achieved CR or CRi. Two patients showed partial remission, and 9 patients did not respond. Among the 5 newly diagnosed patients, 4 achieved CR, and 1 achieved CRi. The median LFS and OS were 5.6 and 10.9 months, respectively. Prior Fms-like tyrosine kinase 3 (FLT3) inhibitor exposure (P = .007), 2 or more inductions (P = .001), and coexisting IDH2 (P = .008) and RUNX1 mutations (P = .003) were associated with lower CR/CRi rates. HSCT consolidation and deep molecular responses (defined as an FLT3-ITD variant allelic frequency [VAF] ≤ 0.1% or a nucleophosmin 1 [NPM1] mutant VAF ≤ 0.01%) were associated with better OS and LFS. Prior FLT3 inhibitor exposure and 2 or more inductions were associated with inferior LFS. CONCLUSIONS SOME was safe and effective for R/R and newly diagnosed FLT3-ITD AML.
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Affiliation(s)
- Chunxiao Zhang
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Stephen S Y Lam
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Garret M K Leung
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Sze-Pui Tsui
- Division of Haematology, Department of Pathology, Queen Mary Hospital, Hong Kong, China
| | - Ning Yang
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Nelson K L Ng
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Ho-Wan Ip
- Division of Haematology, Department of Pathology, Queen Mary Hospital, Hong Kong, China
| | - Chun-Hang Au
- Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Tsun-Leung Chan
- Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Edmond S K Ma
- Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Sze-Fai Yip
- Department of Medicine, Tuen Mun Hospital, Hong Kong, China
| | - Harold K K Lee
- Department of Medicine, Princess Margaret Hospital, Hong Kong, China
| | - June S M Lau
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, China
| | - Tsan-Hei Luk
- Department of Medicine, Queen Elizabeth Hospital, Hong Kong, China
| | - Wa Li
- Department of Clinical Oncology, Prince of Wales Hospital, Hong Kong, China
| | - Yok-Lam Kwong
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Anskar Y H Leung
- Division of Haematology, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
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