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Duployez N, Preudhomme C. Monitoring molecular changes in the management of myelodysplastic syndromes. Br J Haematol 2024. [PMID: 38934371 DOI: 10.1111/bjh.19614] [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: 04/18/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024]
Abstract
The ongoing or anticipated therapeutic advances as well as previous experience in other malignancies, including acute myeloid leukaemia, have made molecular monitoring a potential interesting tool for predicting outcomes and demonstrating treatment efficacy in patients with myelodysplastic syndromes (MDS). The important genetic heterogeneity in MDS has made challenging the establishment of recommendations. In this context, high-throughput/next-generation sequencing (NGS) has emerged as an attractive tool, especially in patients with high-risk diseases. However, its implementation in clinical practice still suffers from a lack of standardization in terms of sensitivity, bioinformatics and result interpretation. Data from literature, mostly gleaned from retrospective cohorts, show NGS monitoring when used appropriately could help clinicians to guide therapy, detect early relapse and predict disease evolution. Translating these observations into personalized patient management requires a prospective evaluation in clinical research and remains a major challenge for the next years.
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Affiliation(s)
- Nicolas Duployez
- Laboratory of Haematology, CHU Lille, Lille, France
- U1277 CANTHER (Cancer Heterogeneity Plasticity and Resistance to Therapies), University of Lille, INSERM, Lille, France
| | - Claude Preudhomme
- Laboratory of Haematology, CHU Lille, Lille, France
- U1277 CANTHER (Cancer Heterogeneity Plasticity and Resistance to Therapies), University of Lille, INSERM, Lille, France
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2
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Klyuchnikov E, Badbaran A, Massoud R, Freiberger P, Wolschke C, Ayuk F, Fehse B, Bacher U, Kröger N. Peri-transplant flow-MRD assessment of cells with leukemic stem cells (LSC) associated phenotype in AML patients undergoing allogeneic stem cell transplantation in CR. Leukemia 2024; 38:386-388. [PMID: 38263432 DOI: 10.1038/s41375-024-02148-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/31/2023] [Accepted: 01/08/2024] [Indexed: 01/25/2024]
Affiliation(s)
- Evgeny Klyuchnikov
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany.
| | - Anita Badbaran
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Radwan Massoud
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Petra Freiberger
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Christine Wolschke
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Francis Ayuk
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Boris Fehse
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Ulrike Bacher
- Department of Hematology and Central Hematology Laboratory, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Nicolaus Kröger
- Department for Stem Cell Transplantation, University Cancer Centre Hamburg-Eppendorf, Hamburg, Germany
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Chatterjee G, Dhende P, Raj S, Shetty V, Ghogale S, Deshpande N, Girase K, Patil J, Kalra A, Narula G, Dalvi K, Dhamne C, Moulik NR, Rajpal S, Patkar NV, Banavali S, Gujral S, Subramanian PG, Tembhare PR. 15-color highly sensitive flow cytometry assay for post anti-CD19 targeted therapy (anti-CD19-CAR-T and blinatumomab) measurable residual disease assessment in B-lymphoblastic leukemia/lymphoma: Real-world applicability and challenges. Eur J Haematol 2024; 112:122-136. [PMID: 37706583 DOI: 10.1111/ejh.14102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/04/2023] [Accepted: 09/05/2023] [Indexed: 09/15/2023]
Abstract
OBJECTIVES Measurable residual disease (MRD) is the most relevant predictor of disease-free survival in B-cell acute lymphoblastic leukemia (B-ALL). We aimed to establish a highly sensitive flow cytometry (MFC)-based B-ALL-MRD (BMRD) assay for patients receiving anti-CD19 immunotherapy with an alternate gating approach and to document the prevalence and immunophenotype of recurrently occurring low-level mimics and confounding populations. METHODS We standardized a 15-color highly-sensitive BMRD assay with an alternate CD19-free gating approach. The study included 137 MRD samples from 43 relapsed/refractory B-ALL patients considered for anti-CD19 immunotherapy. RESULTS The 15-color BMRD assay with CD22/CD24/CD81/CD33-based gating approach was routinely applicable in 137 BM samples and could achieve a sensitivity of 0.0005%. MRD was detected in 29.9% (41/137) samples with 31.7% (13/41) of them showing <.01% MRD. Recurrently occurring low-level cells that showed immunophenotypic overlap with leukemic B-blasts included: (a) CD19+CD10+CD34+CD22+CD24+CD81+CD123+CD304+ plasmacytoid dendritic cells, (b) CD73bright/CD304bright/CD81bright mesenchymal stromal/stem cells (CD10+) and endothelial cells (CD34+CD24+), (c) CD22dim/CD34+/CD38dim/CD81dim/CD19-/CD10-/CD24- early lymphoid progenitor/precursor type-1 cells (ELP-1) and (d) CD22+/CD34+/CD10heterogeneous/CD38moderate/CD81moderate/CD19-/CD24- stage-0 B-cell precursors or ELP-2 cells. CONCLUSIONS We standardized a highly sensitive 15-color BMRD assay with a non-CD19-based gating strategy for patients receiving anti-CD19 immunotherapy. We also described the immunophenotypes of recurrently occurring low-level populations that can be misinterpreted as MRD in real-world practice.
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Affiliation(s)
- Gaurav Chatterjee
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Priyanka Dhende
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Simpy Raj
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Vruksha Shetty
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Sitaram Ghogale
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Nilesh Deshpande
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Karishma Girase
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Jagruti Patil
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Aastha Kalra
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Gaurav Narula
- Department of Pediatric Oncology, Tata Memorial Center, Mumbai, Mumbai, Maharashtra, India
| | - Kajal Dalvi
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Chetan Dhamne
- Department of Pediatric Oncology, Tata Memorial Center, Mumbai, Mumbai, Maharashtra, India
| | - Nirmalya Roy Moulik
- Department of Pediatric Oncology, Tata Memorial Center, Mumbai, Mumbai, Maharashtra, India
| | - Sweta Rajpal
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Nikhil V Patkar
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Shripad Banavali
- Department of Pediatric Oncology, Tata Memorial Center, Mumbai, Mumbai, Maharashtra, India
| | - Sumeet Gujral
- Hematopathology Laboratory, Tata Memorial Center, Mumbai, Mumbai, Maharashtra, India
| | - Papagudi G Subramanian
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
| | - Prashant R Tembhare
- Hematopathology Laboratory, ACTREC, Tata Memorial Center, HBNI University, Navi Mumbai, Maharashtra, India
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Kovach AE, Wood BL. Updates on lymphoblastic leukemia/lymphoma classification and minimal/measurable residual disease analysis. Semin Diagn Pathol 2023; 40:457-471. [PMID: 37953192 DOI: 10.1053/j.semdp.2023.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/18/2023] [Accepted: 10/31/2023] [Indexed: 11/14/2023]
Abstract
Lymphoblastic leukemia/lymphoma (ALL/LBL), especially certain subtypes, continues to confer morbidity and mortality despite significant therapeutic advances. The pathologic classification of ALL/LBL, especially that of B-ALL, has recently substantially expanded with the identification of several distinct and prognostically important genetic drivers. These discoveries are reflected in both current classification systems, the World Health Organization (WHO) 5th edition and the new International Consensus Classification (ICC). In this article, novel subtypes of B-ALL are reviewed, including DUX4, MEF2D and ZNF384-rearranged B-ALL; the rare pediatric entity B-ALL with TLF3::HLF, now added to the classifications, is discussed; updates to the category of B-ALL with BCR::ABL1-like features (Ph-like B-ALL) are summarized; and emerging genetic subtypes of T-ALL are presented. The second half of the article details current approaches to minimal/measurable residual disease (MRD) detection in B-ALL and T-ALL and presents anticipated challenges to current approaches in the burgeoning era of antigen-directed immunotherapy.
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Affiliation(s)
- Alexandra E Kovach
- Department of Pathology and Laboratory Medicine, Children's Hospital Los Angeles, Los Angeles, CA, United States; Keck School of Medicine, University of Southern California, Los Angeles, CA, United States.
| | - Brent L Wood
- Department of Pathology and Laboratory Medicine, Children's Hospital Los Angeles, Los Angeles, CA, United States; Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
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Pan J, Tang K, Luo Y, Seery S, Tan Y, Deng B, Liu F, Xu X, Ling Z, Song W, Xu J, Duan J, Wang Z, Li C, Wang K, Zhang Y, Yu X, Zheng Q, Zhao L, Zhang J, Chang AH, Feng X. Sequential CD19 and CD22 chimeric antigen receptor T-cell therapy for childhood refractory or relapsed B-cell acute lymphocytic leukaemia: a single-arm, phase 2 study. Lancet Oncol 2023; 24:1229-1241. [PMID: 37863088 DOI: 10.1016/s1470-2045(23)00436-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 10/22/2023]
Abstract
BACKGROUND Relapses frequently occur following CD19-directed chimeric antigen receptor (CAR) T-cell treatment for relapsed or refractory B-cell acute lymphocytic leukaemia in children. We aimed to assess the activity and safety of sequential CD19-directed and CD22-directed CAR T-cell treatments. METHODS This single-centre, single-arm, phase 2 trial, done at Beijing GoBroad Boren Hospital, Beijing, China, included patients aged 1-18 years who had relapsed or refractory B-cell acute lymphocytic leukaemia with CD19 and CD22 positivity greater than 95% and an Eastern Cooperative Oncology Group performance status of 0-2. Patients were initially infused with CD19-directed CAR T cells intravenously, followed by CD22-directed CAR T-cell infusion after minimal residual disease-negative complete remission (or complete remission with incomplete haematological recovery) was reached and all adverse events (except haematological adverse events) were grade 2 or better. The target dose for each infusion was 0·5 × 106 to 5·0 × 106 cells per kg. The primary endpoint was objective response rate at 3 months after the first infusion. Secondary endpoints were duration of remission, event-free survival, disease-free survival, overall survival, safety, pharmacokinetics, and B-cell quantification. The prespecified activity analysis included patients who received the target dose and the safety analysis included all treated patients. This study is registered with ClinicalTrials.gov, NCT04340154, and enrolment has ended. FINDINGS Between May 28, 2020, and Aug 16, 2022, 81 participants were enrolled, of whom 31 (38%) were female and 50 (62%) were male. Median age was 8 years (IQR 6-10), all patients were Asian. All 81 patients received the first infusion and 79 (98%) patients received sequential infusions, CD19-directed CAR T cells at a median dose of 2·7 × 106 per kg (IQR 1·1 × 106 to 3·7 × 106) and CD22-directed CAR T cells at a median dose of 2·2 × 106 per kg (1·1 × 106 to 3·7 × 106), with a median interval of 39 days (37-41) between the two infusions. 62 (77%) patients received the target dose, including two patients who did not receive CD22 CAR T cells. At 3 months, 60 (97%, 95% CI 89-100) of the 62 patients who received the target dose had an objective response. Median follow-up was 17·7 months (IQR 11·4-20·9). 18-month event-free survival for patients who received the target dose was 79% (95% CI 66-91), duration of remission was 80% (68-92), and disease-free survival was 80% (68-92) with transplantation censoring; overall survival was 96% (91-100). Common adverse events of grade 3 or 4 between CD19-directed CAR T-cell infusion and 30 days after CD22-directed CAR T-cell infusion included cytopenias (64 [79%] of 81 patients), cytokine release syndrome (15 [19%]), neurotoxicity (four [5%]), and infections (five [6%]). Non-haematological adverse events of grade 3 or worse more than 30 days after CD22-directed CAR T-cell infusion occurred in six (8%) of 79 patients. No treatment-related deaths occurred. CAR T-cell expansion was observed in all patients, with a median peak at 9 days (IQR 7-14) after CD19-directed and 12 days (10-15) after CD22-directed CAR T-cell infusion. At data cutoff, 35 (45%) of 77 evaluable patients had CAR transgenes and 59 (77%) had B-cell aplasia. INTERPRETATION This sequential strategy induced deep and sustained responses with an acceptable toxicity profile, and thus potentially provides long-term benefits for children with this condition. FUNDING The National Key Research & Development Program of China, the CAMS Innovation Fund for Medical Sciences (CIFMS), and the Non-Profit Central Research Institute Fund of Chinese Academy of Medical Sciences. TRANSLATION For the Chinese translation of the abstract see Supplementary Materials section.
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Affiliation(s)
- Jing Pan
- State Key Laboratory of Experimental Hematology, Boren Clinical Translational Center, Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China.
| | - Kaiting Tang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; Tianjin Institutes of Health Science, Tianjin, China
| | - Yuechen Luo
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; Tianjin Institutes of Health Science, Tianjin, China
| | - Samuel Seery
- Faculty of Health and Medicine, Division of Health Research, Lancaster University, Lancaster, UK
| | - Yue Tan
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; Tianjin Institutes of Health Science, Tianjin, China
| | - Biping Deng
- Cytology Laboratory, Beijing GoBroad Boren Hospital, Beijing, China
| | - Feng Liu
- Medical Laboratory, Beijing GoBroad Boren Hospital, Beijing, China
| | - Xiuwen Xu
- Medical Laboratory, Beijing GoBroad Boren Hospital, Beijing, China
| | - Zhuojun Ling
- Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China
| | - Weiliang Song
- Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China
| | - Jinlong Xu
- Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China
| | - Jiajia Duan
- Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China
| | - Zelin Wang
- Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China
| | - Chunyu Li
- Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China
| | - Kai Wang
- Department of Hematology, Beijing GoBroad Boren Hospital, Beijing, China
| | - Yibing Zhang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; Tianjin Institutes of Health Science, Tianjin, China
| | - Xinjian Yu
- Medical Laboratory, Beijing GoBroad Boren Hospital, Beijing, China
| | - Qinlong Zheng
- Medical Laboratory, Beijing GoBroad Boren Hospital, Beijing, China
| | - Liping Zhao
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; Tianjin Institutes of Health Science, Tianjin, China
| | - Jiecheng Zhang
- Department of Hospital Management, GoBroad Medical Group, Beijing, China
| | - Alex H Chang
- Shanghai YaKe Biotechnology, Shanghai, China; Clinical Translational Research Center, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiaoming Feng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China; Tianjin Institutes of Health Science, Tianjin, China; Central Laboratory, Fujian Medical University Union Hospital, Fuzhou, China; Chinese Academy of Medical Sciences Key Laboratory for Prevention and Control of Hematological Disease Treatment Related Infection, Tianjin, China
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van der Linde R, Gatt PN, Smith S, Fernandez MA, Vaughan L, Blyth E, Curnow J, Brown DA, Tegg E, Sasson SC. Measurable Residual Disease (MRD) by Flow Cytometry in Adult B-Acute Lymphoblastic Leukaemia (B-ALL) and Acute Myeloid Leukaemia (AML): Correlation with Molecular MRD Testing and Clinical Outcome at One Year. Cancers (Basel) 2023; 15:5064. [PMID: 37894431 PMCID: PMC10605425 DOI: 10.3390/cancers15205064] [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: 09/15/2023] [Revised: 10/16/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Measurable residual disease (MRD) detected by flow cytometry (FC) is well established in paediatric B- lymphoblastic leukaemia (B-ALL) and adult chronic lymphocytic leukaemia (CLL), but its utility in adult B-ALL and adult acute myeloid leukaemia (AML) is less clear. In this prospective MRD study, one of the largest in Australia to date, we examined consecutive bone marrow aspirates from adult participants with B-ALL (n = 47) and AML (n = 87) sent for FC-MRD testing at a quaternary referral hospital in Sydney. FC-MRD results were correlated to corresponding Mol-MRD testing where available and clinical outcomes at three-month intervals over 1 year. B-ALL showed a moderate positive correlation (rs = 0.401, p < 0.001), while there was no correlation between FC-MRD and Mol-MRD for AML (rs = 0.13, p = 0.237). Five FC-MRD patterns were identified which had significant associations with relapse (X2(4) = 31.17(4), p > 0.001) and survival (X2(4) = 13.67, p = 0.008) in AML, but not in B-ALL. The three-month MRD results were also strongly associated with survival in AML, while the association in B-ALL was less evident. There was a moderate correlation between FC-MRD and Mol-MRD in B-ALL but not AML. The association of FC-MRD with relapse and survival was stronger in AML than in B-ALL. Overall, these findings suggest divergent utilities of FC-MRD in AML and B-ALL.
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Affiliation(s)
- Riana van der Linde
- Department of Laboratory Haematology, Institute of Clinical Pathology and Medical Research, NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia; (L.V.); (E.T.)
- Faculty of Medicine and Health, Sydney Medical School, University of Sydney, Camperdown, NSW 2050, Australia; (P.N.G.); (E.B.); (J.C.); (D.A.B.); (S.C.S.)
| | - Prudence N. Gatt
- Faculty of Medicine and Health, Sydney Medical School, University of Sydney, Camperdown, NSW 2050, Australia; (P.N.G.); (E.B.); (J.C.); (D.A.B.); (S.C.S.)
- Westmead Institute for Medical Research, University of Sydney, Sydney, NSW 2145, Australia
| | - Sandy Smith
- Flow Cytometry Unit, Institute of Clinical Pathology and Medical Research, NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia; (S.S.); (M.A.F.)
| | - Marian A. Fernandez
- Flow Cytometry Unit, Institute of Clinical Pathology and Medical Research, NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia; (S.S.); (M.A.F.)
| | - Lachlin Vaughan
- Department of Laboratory Haematology, Institute of Clinical Pathology and Medical Research, NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia; (L.V.); (E.T.)
- Department of Haematology, Western Sydney Local Health District, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Emily Blyth
- Faculty of Medicine and Health, Sydney Medical School, University of Sydney, Camperdown, NSW 2050, Australia; (P.N.G.); (E.B.); (J.C.); (D.A.B.); (S.C.S.)
- Westmead Institute for Medical Research, University of Sydney, Sydney, NSW 2145, Australia
- Department of Haematology, Western Sydney Local Health District, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Jennifer Curnow
- Faculty of Medicine and Health, Sydney Medical School, University of Sydney, Camperdown, NSW 2050, Australia; (P.N.G.); (E.B.); (J.C.); (D.A.B.); (S.C.S.)
- Department of Haematology, Western Sydney Local Health District, Westmead Hospital, Westmead, NSW 2145, Australia
| | - David A. Brown
- Faculty of Medicine and Health, Sydney Medical School, University of Sydney, Camperdown, NSW 2050, Australia; (P.N.G.); (E.B.); (J.C.); (D.A.B.); (S.C.S.)
- Westmead Institute for Medical Research, University of Sydney, Sydney, NSW 2145, Australia
- Department of Clinical Immunology and Immunopathology, Institute of Clinical Pathology and Medical Research, NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Elizabeth Tegg
- Department of Laboratory Haematology, Institute of Clinical Pathology and Medical Research, NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia; (L.V.); (E.T.)
- Faculty of Medicine and Health, Sydney Medical School, University of Sydney, Camperdown, NSW 2050, Australia; (P.N.G.); (E.B.); (J.C.); (D.A.B.); (S.C.S.)
| | - Sarah C. Sasson
- Faculty of Medicine and Health, Sydney Medical School, University of Sydney, Camperdown, NSW 2050, Australia; (P.N.G.); (E.B.); (J.C.); (D.A.B.); (S.C.S.)
- Department of Clinical Immunology and Immunopathology, Institute of Clinical Pathology and Medical Research, NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia
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Measurable residual disease in adult acute myeloid leukaemia: evaluation of a multidimensional 'radar' flow cytometric plot analysis method. Pathology 2023; 55:383-390. [PMID: 36725446 DOI: 10.1016/j.pathol.2022.10.007] [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: 04/04/2022] [Revised: 09/11/2022] [Accepted: 10/09/2022] [Indexed: 01/01/2023]
Abstract
Measurable residual disease (MRD) monitoring in acute myeloid leukaemia (AML) is becoming increasingly important and is predominantly performed by multiparameter flow cytometry (MFC) or quantitative polymerase chain reactions (RT-qPCR). We investigated the use of multidimensional plots (MD-MFC) for AML MRD monitoring in an adult cohort. AML MRD was determined using a novel MD-MFC method for 115 MRD samples. Results were correlated with traditional two-dimensional MFC (2D-MFC) and molecular methods. Using the standard cut-off of 0.1% CD45+ cells, concordance was 99/115 (p=0.332). Eighty-four of 115 were concordant using a very low reporting limit of 0.01% (p=0.216). MRD <0.1% by either method was present in 40 of 115 samples. Fifteen of 40 were MD-MFC positive and 2D-MFC negative. Of these two of 15 had a molecular MRD marker and both were positive. Molecular MRD markers were available in 36 of 115 cases. Twenty-one of 36 (58%) were concordant with MD-MFC. Eight of 36 had detectable molecular MRD only and eight of 36 had positive MD-MFC only. There was no correlation between either the MFC method and the molecular results. In summary, there is good correlation between MD- and 2D-MFC-MRD and no correlation between the MFC and molecular methods.
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8
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Oral azacitidine prolongs survival of patients with AML in remission independent of measurable residual disease status. Blood 2022; 139:2145-2155. [PMID: 34995344 DOI: 10.1182/blood.2021013404] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 12/29/2021] [Indexed: 11/20/2022] Open
Abstract
Measurable residual disease (MRD) in patients with acute myeloid leukemia (AML) in remission after intensive chemotherapy is predictive of early relapse and poor survival. Post-remission maintenance therapy that prolongs MRD negativity or converts MRD positive (MRD+) patients to MRD negative (MRD-) status may delay or prevent relapse and improve overall survival (OS). In the phase 3 QUAZAR AML-001 trial, oral azacitidine (Oral-AZA; formerly CC-486), a hypomethylating agent, significantly prolonged OS and relapse-free survival (RFS) compared with placebo in patients aged ≥55 years with AML in first remission after intensive chemotherapy who were not candidates for hematopoietic stem cell transplantation. In this trial, MRD (≥0.1% leukemic cells in bone marrow) was assessed by multiparameter flow cytometry in serial samples collected at baseline and on day 1 of every 3 cycles. As expected, baseline MRD status was significantly associated with both OS and RFS. Multivariate analyses showed Oral-AZA significantly improved OS and RFS vs. placebo independent of baseline MRD status. Oral-AZA treatment also extended the duration of MRD negativity by 6 months vs. placebo, and resulted in a higher rate of conversion from MRD+ at baseline to MRD- during treatment: 37% vs. 19%, respectively. In the Oral-AZA arm, 24% of MRD responders achieved MRD negativity >6 months after treatment initiation. While presence or absence of MRD was a strong prognostic indicator of OS and RFS, there were added survival benefits with Oral-AZA maintenance therapy compared with placebo, independent of patients' MRD status at baseline. NCT01757535 Clinicaltrials.gov.
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Béné MC. Issue Highlights-September 2021. CYTOMETRY PART B-CLINICAL CYTOMETRY 2021; 100:537-540. [PMID: 34536066 DOI: 10.1002/cyto.b.22031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marie C Béné
- Hematology Biology, Nantes University Hospital, Inserm 1232, CRCINA, Nantes, France
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10
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Shang L, Cai X, Sun W, Cheng Q, Mi Y. Time point-dependent concordance and prognostic significance of flow cytometry and real time quantitative PCR for measurable/minimal residual disease detection in acute myeloid leukemia with t(8;21)(q22;q22.1). CYTOMETRY PART B-CLINICAL CYTOMETRY 2021; 102:34-43. [PMID: 34232569 DOI: 10.1002/cyto.b.22028] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 06/23/2021] [Accepted: 06/29/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND Flow cytometry (FCM) and PCR are reliable methods for assessing minimal residual disease (MRD) in acute myeloid leukemia with t(8;21)(q22;q22.1). The aim of this study was to analyze the concordant rate of these two methods and their prognostic significance. METHODS PCR and FCM were simultaneously used for MRD analysis at four different time points on 450 BM samples from 124 patients with AML with t(8;21)(q22;q22.1). The four monitoring time points included post-induction (first), after the first consolidation (second) and the second consolidation (third), and at the end of chemotherapy or before Allo/Auto stem cell transplantation (fourth). RESULTS The concordant rates of the two methods were 33.06%, 25.81%, 49.59%, and 75.31%, respectively, and the main discordant cases were FCM-/PCR+ cases. At all monitoring time points, the MRD level ≥ 10-4 by FCM indicated a poor 3-year Relapse-Free Survival (RFS) (p < 0.001). More than 2-log MRD reduction by PCR after induction and more than 3-log reduction by PCR after the first consolidation remained the significant predictors of better RFS (p < 0.001). After the second consolidation, the negative MRD by PCR (<10-5) was also associated with improved RFS (p = 0.002). A > 1-log increase in PCR can effectively predict recurrence after molecular remission (p < 0.001). In the multivariate analysis, MRD≥0.01% by. FCM and less than 2-log MRD reduction by PCR after induction remained the significant predictors of poor RFS (p < 0.05). CONCLUSIONS FCM+ always indicates a poor prognosis. Sequential monitoring by PCR is of significance for evaluating prognosis. Our findings suggest a complementary role of two analyses in optimizing risk stratification in clinical practice.
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Affiliation(s)
- Lei Shang
- Department of Pathology and Lab Medicine, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Xiaojin Cai
- Department of Pathology and Lab Medicine, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Wanchen Sun
- Department of Pathology and Lab Medicine, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Qingnian Cheng
- Department of Pathology and Lab Medicine, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - Yingchang Mi
- Department of Leukemia, State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
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