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Schore RJ, Angiolillo AL, Kairalla JA, Devidas M, Rabin KR, Zweidler-McKay P, Borowitz MJ, Wood B, Carroll AJ, Heerema NA, Relling MV, Hitzler J, Kadan-Lottick NS, Maloney K, Wang C, Carroll WL, Winick NJ, Raetz EA, Loh ML, Hunger SP. Outstanding outcomes with two low intensity regimens in children with low-risk B-ALL: a report from COG AALL0932. Leukemia 2023; 37:1375-1378. [PMID: 36966262 PMCID: PMC10503688 DOI: 10.1038/s41375-023-01870-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/17/2023] [Accepted: 03/01/2023] [Indexed: 03/27/2023]
Affiliation(s)
- Reuven J Schore
- Children's National Health System, Washington, DC, USA.
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA.
| | - Anne L Angiolillo
- Children's National Health System, Washington, DC, USA
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - John A Kairalla
- Department of Biostatistics, Colleges of Medicine, Public Health & Health Professions, University of Florida, Gainesville, FL, USA
| | - Meenakshi Devidas
- Department of Global Pediatric Medicine, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Karen R Rabin
- Texas Children's Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | | | - Michael J Borowitz
- Department of Pathology, Johns Hopkins Medical Institutions, Baltimore, MD, USA
| | - Brent Wood
- Department of Laboratory Medicine, University of Washington, Seattle, WA, USA
| | - Andrew J Carroll
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Nyla A Heerema
- Department of Pathology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Mary V Relling
- St Jude's Children's Research Hospital, Memphis, TN, USA
| | | | | | - Kelly Maloney
- Children's Hospital Colorado and the Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Cindy Wang
- Department of Biostatistics, Colleges of Medicine, Public Health & Health Professions, University of Florida, Gainesville, FL, USA
| | - William L Carroll
- Department of Pediatrics and Perlmutter Cancer Center, New York University Langone Medical Center, New York, NY, USA
| | - Naomi J Winick
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Elizabeth A Raetz
- Department of Pediatrics and Perlmutter Cancer Center, New York University Langone Medical Center, New York, NY, USA
| | - Mignon L Loh
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, Seattle, WA, USA
- Department of Pediatrics, Seattle Children's Hospital, University of Washington, Seattle, WA, USA
| | - Stephen P Hunger
- Department of Pediatrics and the Center for Childhood Cancer Research, the Children's Hospital of Philadelphia, Philadelphia, PA, USA
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2
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Escherich C, Chen W, Miyamoto S, Namikawa Y, Yang W, Teachey DT, Li Z, Raetz EA, Larsen E, Devidas M, Martin PL, Bowman WP, Wu G, Pui CH, Hunger SP, Loh ML, Takagi M, Yang JJ. Identification of TCF3 germline variants in pediatric B-cell acute lymphoblastic leukemia. Blood Adv 2023; 7:2177-2180. [PMID: 36576946 PMCID: PMC10196986 DOI: 10.1182/bloodadvances.2022008563] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 11/03/2022] [Accepted: 11/08/2022] [Indexed: 12/29/2022] Open
Affiliation(s)
- Carolin Escherich
- Department for Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University, Duesseldorf, Germany
- Ben Towne Center for Childhood Cancer Research, Seattle Children’s Hospital, University of Washington, Seattle, WA
| | - Wenan Chen
- Center for Applied Bioinformatics, St. Jude Children’s Research Hospital, Memphis, TN
| | - Satoshi Miyamoto
- Department of Pediatrics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yui Namikawa
- Department of Pediatrics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Wenjian Yang
- Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, Memphis, TN
| | - David T. Teachey
- Department of Pediatrics and Center for Childhood Cancer Research, Children’s Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Zhenhua Li
- Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, Memphis, TN
| | - Elizabeth A. Raetz
- Division of Pediatric Hematology and Oncology, Perlmutter Cancer Center, New York University Langone Health, New York, NY
| | - Eric Larsen
- Department of Pediatrics, Maine Children’s Cancer Program, Scarborough, ME
| | - Meenakshi Devidas
- Department of Global Pediatric Medicine, St. Jude Children’s Research Hospital, Memphis, TN
| | - Paul L. Martin
- Pediatric Transplant and Cellular Therapy, Duke University School of Medicine, Durham, NC
| | - W. Paul Bowman
- Department of Pediatrics, Cook Children’s Medical Center, Fort Worth, TX
| | - Gang Wu
- Center for Applied Bioinformatics, St. Jude Children’s Research Hospital, Memphis, TN
| | - Ching-Hon Pui
- Department of Global Pediatric Medicine, St. Jude Children’s Research Hospital, Memphis, TN
- Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children’s Research Hospital, Memphis, TN
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN
| | - Stephen P. Hunger
- Department of Pediatrics and Center for Childhood Cancer Research, Children’s Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Mignon L. Loh
- Ben Towne Center for Childhood Cancer Research, Seattle Children’s Hospital, University of Washington, Seattle, WA
| | - Masatoshi Takagi
- Department of Pediatrics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Jun J. Yang
- Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, Memphis, TN
- Hematological Malignancies Program, Comprehensive Cancer Center, St. Jude Children’s Research Hospital, Memphis, TN
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3
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Linares Ballesteros A, Yunis LK, García J, Aponte N, Flechas J, Martinez C, Uribe G, Quintero E, Díaz A, Pardo C, Sarmiento IC, Contreras A, Yunis JJ. Philadelphia-like acute lymphoblastic leukemia: Characterization in a pediatric cohort in a referral center in Colombia. Cancer Rep (Hoboken) 2022; 5:e1587. [PMID: 34787376 PMCID: PMC9124514 DOI: 10.1002/cnr2.1587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/25/2021] [Accepted: 10/25/2021] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Philadelphia-like (Ph-like) acute lymphoblastic leukemia (ALL) is a subtype of pediatric leukemia with high risk factors and poor outcome. There are few reports of its prevalence in Latin America. AIM This study evaluated the frequency and clinical and biological characteristics of Ph-like ALL in a pediatric cancer center in Colombia. METHODS The Ph-like genetic profile was analyzed by a low-density array (LDA). Samples from patients with Ph-like ALL were analyzed by fluorescent in situ hybridization for cytokine receptor like factor 2 (CRLF2) and ABL proto-oncogene 1, non-receptor tyrosine kinase (ABL1) rearrangements. Copy number variations were assessed by multiplex ligation probe amplification. RESULTS Data from 121 patients were analyzed. Fifteen patients (12.4%) had Ph-like ALL, and these patients had significantly higher leukocyte counts at diagnosis and higher levels of minimal residual disease on days 15 and 33 of induction than patients without the Ph-like subtype. There were no significant differences in sex, age, or response to prednisone at day 8 between the two groups. CRLF2 rearrangements were identified in eight patients, and ABL1 rearrangements were identified in two patients. Other genetic alterations alone or in combination were identified in 77% of patients, including deletions in cyclin dependent kinase inhibitor 2 A/B (46.2%), IKAROS family zinc finger 1 (38.3%), and paired box 5 (30.8%). CONCLUSIONS Ph-like ALL had a 12.4% prevalence in our cohort of patients with pediatric ALL. The identification of this group of patients has importance for risk stratification and future targeted therapy.
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Affiliation(s)
- Adriana Linares Ballesteros
- Pediatric Hematology/Oncology UnitHOMI Fundación Hospital Pediátrico la MisericordiaBogotáColombia
- Grupo Oncohematología PediátricaUniversidad Nacional de ColombiaBogotáColombia
| | - Luz Karime Yunis
- Servicios Médicos Yunis Turbay y Cía S.A.S. Instituto de GenéticaBogotáColombia
- Grupo de Patología MolecularUniversidad Nacional de ColombiaBogotáColombia
| | - Johnny García
- Pediatric Hematology/Oncology UnitHOMI Fundación Hospital Pediátrico la MisericordiaBogotáColombia
| | - Nelson Aponte
- Pediatric Hematology/Oncology UnitHOMI Fundación Hospital Pediátrico la MisericordiaBogotáColombia
| | - Jessica Flechas
- Pediatric Hematology/Oncology UnitHOMI Fundación Hospital Pediátrico la MisericordiaBogotáColombia
- Grupo Oncohematología PediátricaUniversidad Nacional de ColombiaBogotáColombia
| | - Cindy Martinez
- Grupo Oncohematología PediátricaUniversidad Nacional de ColombiaBogotáColombia
| | - Gloria Uribe
- Pediatric Pathology UnitHOMI Fundación Hospital Pediatrico la MisericordiaBogotáColombia
| | - Edna Quintero
- Pediatric Pathology UnitHOMI Fundación Hospital Pediatrico la MisericordiaBogotáColombia
| | - Angela Díaz
- Servicios Médicos Yunis Turbay y Cía S.A.S. Instituto de GenéticaBogotáColombia
| | - Carlos Pardo
- Pediatric Hematology/Oncology UnitHOMI Fundación Hospital Pediátrico la MisericordiaBogotáColombia
- Grupo Oncohematología PediátricaUniversidad Nacional de ColombiaBogotáColombia
| | | | - Agustin Contreras
- Pediatric Hematology/Oncology UnitHOMI Fundación Hospital Pediátrico la MisericordiaBogotáColombia
| | - Juan Jose Yunis
- Servicios Médicos Yunis Turbay y Cía S.A.S. Instituto de GenéticaBogotáColombia
- Grupo de Patología MolecularUniversidad Nacional de ColombiaBogotáColombia
- Departamento de Patología, Facultad de Medicina e Instituto de GenéticaUniversidad Nacional de ColombiaBogotáColombia
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4
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Protocol for ICiCLe-ALL-14 (InPOG-ALL-15-01): a prospective, risk stratified, randomised, multicentre, open label, controlled therapeutic trial for newly diagnosed childhood acute lymphoblastic leukaemia in India. Trials 2022; 23:102. [PMID: 35101099 PMCID: PMC8805436 DOI: 10.1186/s13063-022-06033-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 01/15/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
In the west, survival following treatment of childhood acute lymphoblastic leukaemia (ALL) approaches 90%. Outcomes in India do not exceed 70%. To address this disparity, the Indian Collaborative Childhood Leukaemia group (ICiCLe) developed in 2013 a contemporary treatment protocol for uniform risk-stratified management of first presentation ALL based on cytogenetics and minimal residual disease levels (MRD). A multicentre randomised clinical trial opened in 2016 (ICiCLe-ALL-14) and examines the benefit of randomised interventions to decrease toxicity and improve outcomes.
Methods
Patients 1–18 years with newly diagnosed ALL are categorised into four risk groups based on presentation features, tumour genetics and treatment response. Standard risk includes young (< 10 years) B cell precursor ALL (BCP-ALL) patients with low presentation leucocyte count (< 50 × 109/L) and no high-risk features. Intermediate risk includes BCP-ALL patients with no high-risk features but are older and have high presentation leucocyte counts and/or bulky disease. High risk includes BCP-ALL patients with any high-risk feature, including high-risk genetics, central nervous system leukaemia, poor prednisolone response at treatment day 8 and high MRD (≥ 0·01%) at the end of induction. Patients with T-lineage ALL constitute the fourth risk group. All patients receive four intensive treatment blocks (induction, consolidation, interim maintenance, delayed intensification) followed by 96 weeks of maintenance. Treatment intensity varies by risk group. Clinical data management is based on a web-based remote data capture system. The first randomisation examines the toxicity impact of a shorter induction schedule of prednisolone (3 vs 5 weeks) in young non-high-risk BCP-ALL. The second randomisation examines the survival benefit of substituting doxorubicin with mitoxantrone in delayed intensification for all patients. Primary outcome measures include event-free survival (overall, by risk groups), sepsis rates in induction (first randomisation) and event-free survival rates following second randomisation.
Discussion
ICiCLe-ALL-14 is the first multicentre randomised childhood cancer clinical trial in India. The pre-trial phase allowed standardisation of risk-stratification diagnostics and established the feasibility of collaborative practice, uniform treatment, patient enrolment and data capture. Pre-trial observations confirm the impact of risk-stratified therapy in reducing treatment-related deaths and costs. Uniform practice across centres allows patients to access care locally, potentially decreasing financial hardship and dislocation.
Trial registration
Clinical Trials Registry-India (CTRI) CTRI/2015/12/006434. Registered on 11 December 2015
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5
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Zhang H, Liu APY, Devidas M, Lee S, Cao X, Pei D, Borowitz M, Wood B, Gastier-Foster JM, Dai Y, Raetz E, Larsen E, Winick N, Bowman WP, Karol S, Yang W, Martin PL, Carroll WL, Pui CH, Mullighan CG, Evans WE, Cheng C, Hunger SP, Relling MV, Loh ML, Yang JJ. Association of GATA3 Polymorphisms With Minimal Residual Disease and Relapse Risk in Childhood Acute Lymphoblastic Leukemia. J Natl Cancer Inst 2021; 113:408-417. [PMID: 32894760 PMCID: PMC8680540 DOI: 10.1093/jnci/djaa138] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/17/2020] [Accepted: 08/26/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Minimal residual disease (MRD) after induction therapy is one of the strongest prognostic factors in childhood acute lymphoblastic leukemia (ALL), and MRD-directed treatment intensification improves survival. Little is known about the effects of inherited genetic variants on interpatient variability in MRD. METHODS A genome-wide association study was performed on 2597 children on the Children's Oncology Group AALL0232 trial for high-risk B-cell ALL. Association between genotype and end-of-induction MRD levels was evaluated for 863 370 single nucleotide polymorphisms (SNPs), adjusting for genetic ancestry and treatment strata. Top variants were further evaluated in a validation cohort of 491 patients from the Children's Oncology Group P9905 and 6 ALL trials. The independent prognostic value of single nucleotide polymorphisms was determined in multivariable analyses. All statistical tests were 2-sided. RESULTS In the discovery genome-wide association study, we identified a genome-wide significant association at the GATA3 locus (rs3824662, odds ratio [OR] = 1.58, 95% confidence interval [CI] = 1.35 to 1.84; P = 1.15 × 10-8 as a dichotomous variable). This association was replicated in the validation cohort (P = .003, MRD as a dichotomous variable). The rs3824662 risk allele independently predicted ALL relapse after adjusting for age, white blood cell count, and leukemia DNA index (P = .04 and .007 in the discovery and validation cohort, respectively) and remained prognostic when the analyses were restricted to MRD-negative patients (P = .04 and .03 for the discovery and validation cohorts, respectively). CONCLUSION Inherited GATA3 variant rs3824662 strongly influences ALL response to remission induction therapy and is associated with relapse. This work highlights the potential utility of germline variants in upfront risk stratification in ALL.
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Affiliation(s)
- Hui Zhang
- Department of Pharmaceutical Sciences, St Jude
Children’s Research Hospital, Memphis, TN, USA
- Department of Hematology & Oncology,
Guangzhou Women and Children’s Medical Center, Guangzhou,
China
| | - Anthony Pak-Yin Liu
- Department of Oncology, St Jude Children’s
Research Hospital, Memphis, TN, USA
| | - Meenakshi Devidas
- Department of Global Pediatric Medicine, St Jude
Children’s Research Hospital, Memphis, TN, USA
- Department of Biostatistics, University of
Florida, Gainesville, FL, USA
| | - Shawn HR Lee
- Department of Pharmaceutical Sciences, St Jude
Children’s Research Hospital, Memphis, TN, USA
- Division of Paediatric Hematology-Oncology, Khoo
Teck Puat-National University Children’s Medical Institute, National
University Health System, Singapore
| | - Xueyuan Cao
- Preventive Medicine, University of Tennessee Health
Science Center, Memphis, TN, USA
| | - Deqing Pei
- Department of Biostatistics, St Jude
Children’s Research Hospital, Memphis, TN, USA
| | - Michael Borowitz
- Division of Hematologic Pathology, Department of
Pathology, Johns Hopkins Medical Institute, Baltimore, MD,
USA
| | - Brent Wood
- Department of Laboratory Medicine, University of
Washington, Seattle, WA, USA
| | | | - Yunfeng Dai
- Department of Biostatistics, University of
Florida, Gainesville, FL, USA
| | - Elizabeth Raetz
- Division of Pediatric Hematology/Oncology,
Department of Pediatrics, Stephen D. Hassenfeld Children’s Center for
Cancer & Blood Disorders, New York, NY, USA
| | - Eric Larsen
- Maine Children’s Cancer
Program, Scarborough, ME, USA
| | - Naomi Winick
- Department of Pediatrics, University of Texas
Southwestern Medical Center, Dallas, TX, USA
| | - W Paul Bowman
- Department of Pediatrics, Cook Children’s
Medical Center, Fort Worth, TX, USA
| | - Seth Karol
- Department of Oncology, St Jude Children’s
Research Hospital, Memphis, TN, USA
| | - Wenjian Yang
- Department of Pharmaceutical Sciences, St Jude
Children’s Research Hospital, Memphis, TN, USA
| | - Paul L Martin
- Department of Pediatrics, Duke
University, Durham, NC, USA
| | - William L Carroll
- Division of Pediatric Hematology/Oncology,
Department of Pediatrics, Stephen D. Hassenfeld Children’s Center for
Cancer & Blood Disorders, New York, NY, USA
| | - Ching-Hon Pui
- Department of Oncology, St Jude Children’s
Research Hospital, Memphis, TN, USA
| | - Charles G Mullighan
- Department of Pathology, St Jude Children’s
Research Hospital, Memphis, TN, USA
| | - William E Evans
- Department of Pharmaceutical Sciences, St Jude
Children’s Research Hospital, Memphis, TN, USA
| | - Cheng Cheng
- Department of Biostatistics, St Jude
Children’s Research Hospital, Memphis, TN, USA
| | - Stephen P Hunger
- Division of Oncology and the Center for Childhood
Cancer Research, Department of Pediatrics, Children’s Hospital of
Philadelphia and the Perelman School of Medicine at the University of
Pennsylvania, Philadelphia, PA, USA
| | - Mary V Relling
- Department of Pharmaceutical Sciences, St Jude
Children’s Research Hospital, Memphis, TN, USA
| | - Mignon L Loh
- Division of Hematology Oncology, Department of
Pediatrics, Benioff Children’s Hospital and University of
California, San Francisco, San Francisco, CA, USA
| | - Jun J Yang
- Department of Pharmaceutical Sciences, St Jude
Children’s Research Hospital, Memphis, TN, USA
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6
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Emerging molecular subtypes and therapeutic targets in B-cell precursor acute lymphoblastic leukemia. Front Med 2021; 15:347-371. [PMID: 33400146 DOI: 10.1007/s11684-020-0821-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 09/04/2020] [Indexed: 12/13/2022]
Abstract
B-cell precursor acute lymphoblastic leukemia (BCP-ALL) is characterized by genetic alterations with high heterogeneity. Precise subtypes with distinct genomic and/or gene expression patterns have been recently revealed using high-throughput sequencing technology. Most of these profiles are associated with recurrent non-overlapping rearrangements or hotspot point mutations that are analogous to the established subtypes, such as DUX4 rearrangements, MEF2D rearrangements, ZNF384/ZNF362 rearrangements, NUTM1 rearrangements, BCL2/MYC and/or BCL6 rearrangements, ETV6-RUNX1-like gene expression, PAX5alt (diverse PAX5 alterations, including rearrangements, intragenic amplifications, or mutations), and hotspot mutations PAX5 (p.Pro80Arg) with biallelic PAX5 alterations, IKZF1 (p.Asn159Tyr), and ZEB2 (p.His1038Arg). These molecular subtypes could be classified by gene expression patterns with RNA-seq technology. Refined molecular classification greatly improved the treatment strategy. Multiagent therapy regimens, including target inhibitors (e.g., imatinib), immunomodulators, monoclonal antibodies, and chimeric antigen receptor T-cell (CAR-T) therapy, are transforming the clinical practice from chemotherapy drugs to personalized medicine in the field of risk-directed disease management. We provide an update on our knowledge of emerging molecular subtypes and therapeutic targets in BCP-ALL.
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7
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Oh BLZ, Lee SHR, Foo KM, Chiew KH, Seeto ZZL, Chen ZW, Neoh CCC, Liew GSM, Eng JJ, Lam JCM, Chan YH, Quah TC, Tan AM, Yeoh AEJ. Successful toxicity reduction during delayed intensification in the non-high-risk arm of Malaysia-Singapore Acute Lymphoblastic Leukaemia 2010 study. Eur J Cancer 2020; 142:92-101. [PMID: 33246161 DOI: 10.1016/j.ejca.2020.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/12/2020] [Accepted: 10/07/2020] [Indexed: 11/29/2022]
Abstract
In non-high-risk (non-HR) patients, the Malaysia-Singapore Acute Lymphoblastic Leukaemia 2003 (MS2003) study achieved good outcomes. However, its delayed-intensification (DI) phase, comprising repeated blocks of protocol III (2003-PIII), was toxic and caused significant treatment delays. The successor MS2010 study attempted to lower DI toxicity by replacing myelosuppressive drugs (doxorubicin, cytarabine) with vincristine and asparaginase. PATIENTS AND METHODS We analysed 1748 admissions for fever in 315 Singapore children with non-HR acute lymphoblastic leukaemia (ALL) (MS2003, n = 183; MS2010, n = 132), comprising 76% of the total cohort (n = 413), to study the impact of these changes. RESULTS The new 2010-PVa which has no doxorubicin, was associated with significantly fewer hospitalisations due to fever (0.08 versus 0.30 admissions per block [A/blk], p < 0.001), as than 2003-PIIIa. Similarly in 2010-PIIIb and PVb, where one block of cytarabine was replaced by two doses of vincristine, admissions for fever were also fewer (0.47 versus 0.74 A/blk, p < 0.001) than in 2003-PIIIb. However, the addition of single doses of vincristine and asparaginase in 2010-PIIIa, even with a mandatory seven-day rest, led to more hospitalisations (0.45 A/blk, p < 0.001), increased risk of bacteraemia (relative-risk (RR) = 7.66, p = 0.005) and critical-care admissions (RR = 4.31, p = 0.13). Despite this, overall treatment-related mortality decreased from 2.7% to 0.8%. Taken together, the reduced phase delays allowed earlier completion of the intensive phase of treatment (standard risk: 38.1 versus 49.4 weeks, p < 0.001; intermediate risk: 50.9 versus 58.8 weeks, p < 0.001), while maintaining excellent 10-year event-free survival of 95.4% and overall survival of 96.2%. CONCLUSIONS In non-HR ALL, replacing doxorubicin/cytarabine with vincristine/asparaginase during some DI blocks is effective in reducing toxicity without compromising outcomes. CLINICAL TRIAL INFORMATION NCT0289464.
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Affiliation(s)
- Bernice L Z Oh
- Viva-University Children's Cancer Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore; Department of Paediatrics, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Shawn H R Lee
- Viva-University Children's Cancer Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore; Department of Paediatrics, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Koon M Foo
- Department of Paediatric Subspecialties Haematology/Oncology Service, KK Women's and Children's Hospital, Singapore
| | - Kean H Chiew
- Viva-University Children's Cancer Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore; Department of Paediatrics, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Zelia Z L Seeto
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Zhi W Chen
- Viva-University Children's Cancer Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore; Department of Paediatrics, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Cheryl C C Neoh
- Viva-University Children's Cancer Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore
| | - Germaine S M Liew
- Department of Paediatric Subspecialties Haematology/Oncology Service, KK Women's and Children's Hospital, Singapore
| | - Jing J Eng
- Department of Paediatric Subspecialties Haematology/Oncology Service, KK Women's and Children's Hospital, Singapore
| | - Joyce C M Lam
- Department of Paediatric Subspecialties Haematology/Oncology Service, KK Women's and Children's Hospital, Singapore
| | - Yiong H Chan
- Biostatistics Unit, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Thuan C Quah
- Viva-University Children's Cancer Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore; Department of Paediatrics, Yong Loo Lin School of Medicine, National University Singapore, Singapore
| | - Ah M Tan
- Department of Paediatric Subspecialties Haematology/Oncology Service, KK Women's and Children's Hospital, Singapore
| | - Allen E J Yeoh
- Viva-University Children's Cancer Centre, Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore; Department of Paediatrics, Yong Loo Lin School of Medicine, National University Singapore, Singapore.
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