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Schilhabel A, Szczepanowski M, van Gastel-Mol EJ, Schillalies J, Ray J, Kim D, Nováková M, Dombrink I, van der Velden VHJ, Boettcher S, Brüggemann M, Kneba M, van Dongen JJM, Langerak AW, Ritgen M. Patient specific real-time PCR in precision medicine - Validation of IG/TR based MRD assessment in lymphoid leukemia. Front Oncol 2023; 12:1111209. [PMID: 36727082 PMCID: PMC9885152 DOI: 10.3389/fonc.2022.1111209] [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: 11/29/2022] [Accepted: 12/28/2022] [Indexed: 01/18/2023] Open
Abstract
Detection of patient- and tumor-specific clonally rearranged immune receptor genes using real-time quantitative (RQ)-PCR is an accepted method in the field of precision medicine for hematologic malignancies. As individual primers are needed for each patient and leukemic clone, establishing performance specifications for the method faces unique challenges. Results for series of diagnostic assays for CLL and ALL patients demonstrate that the analytic performance of the method is not dependent on patients' disease characteristics. The calibration range is linear between 10-1 and 10-5 for 90% of all assays. The detection limit of the current standardized approach is between 1.8 and 4.8 cells among 100,000 leukocytes. RQ-PCR has about 90% overall agreement to flow cytometry and next generation sequencing as orthogonal methods. Accuracy and precision across different labs, and above and below the clinically applied cutoffs for minimal/measurable residual disease (MRD) demonstrate the robustness of the technique. The here reported comprehensive, IVD-guided analytical validation provides evidence that the personalized diagnostic methodology generates robust, reproducible and specific MRD data when standardized protocols for data generation and evaluation are used. Our approach may also serve as a guiding example of how to accomplish analytical validation of personalized in-house diagnostics under the European IVD Regulation.
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Affiliation(s)
- Anke Schilhabel
- Hämatologie Labor Kiel, Medical Department II, Hematology and Oncology, University Medical Center Schleswig-Holstein, Kiel, Germany,*Correspondence: Anke Schilhabel,
| | - Monika Szczepanowski
- Hämatologie Labor Kiel, Medical Department II, Hematology and Oncology, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Ellen J. van Gastel-Mol
- Laboratory Medical Immunology, Department of Immunology, Erasmus Medical Center (MC), University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Janina Schillalies
- Hämatologie Labor Kiel, Medical Department II, Hematology and Oncology, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Jill Ray
- Oncology Biomarker Development, Genentech, Inc., South San Francisco, CA, United States
| | - Doris Kim
- Oncology Biomarker Development, Genentech, Inc., South San Francisco, CA, United States
| | - Michaela Nováková
- Childhood Leukemia Investigation Prague (CLIP)-Department of Pediatric Hematology and Oncology, Second Medical Faculty, Charles University and University Hospital Motol, Prague, Czechia
| | - Isabel Dombrink
- Hämatologie Labor Kiel, Medical Department II, Hematology and Oncology, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Vincent H. J. van der Velden
- Laboratory Medical Immunology, Department of Immunology, Erasmus Medical Center (MC), University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Sebastian Boettcher
- Department of Medicine III Hematology, Oncology and Palliative Care, University Hospital, Rostock, Germany
| | - Monika Brüggemann
- Hämatologie Labor Kiel, Medical Department II, Hematology and Oncology, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Michael Kneba
- Hämatologie Labor Kiel, Medical Department II, Hematology and Oncology, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Jacques J. M. van Dongen
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Leiden, Netherlands
| | - Anton W. Langerak
- Laboratory Medical Immunology, Department of Immunology, Erasmus Medical Center (MC), University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Matthias Ritgen
- Hämatologie Labor Kiel, Medical Department II, Hematology and Oncology, University Medical Center Schleswig-Holstein, Kiel, Germany
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Raponi S, Della Starza I, De Propris MS, Del Giudice I, Mauro FR, Marinelli M, Di Maio V, Piciocchi A, Foà R, Guarini A. Minimal residual disease monitoring in chronic lymphocytic leukaemia patients. A comparative analysis of flow cytometry and ASO IgH RQ-PCR. Br J Haematol 2014; 166:360-8. [PMID: 24735016 DOI: 10.1111/bjh.12887] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 02/12/2014] [Indexed: 12/21/2022]
Abstract
Minimal residual disease (MRD) is becoming increasingly important in chronic lymphocytic leukaemia (CLL) as treatment strategies are progressively improving. The primary objective of this study was to compare the applicability of three different flow cytometric approaches: basic 4-colour analysis, European Research Initiative in CLL (ERIC) consensus method and 8-colour analysis. Secondly, we investigated the sensitivity and specificity of flow cytometry (FC) compared to molecular analyses for MRD detection. A total of 462 CLL samples were evaluated by basic FC; in 143, ERIC consensus method was also performed and all three FC methodologies were applied in a subgroup of 10 cases. No discordance in defining MRD-positive/negative samples was observed between the FC methods; within positive samples, the ERIC consensus method and 8-colour analysis showed the most accurate results. MRD was analysed by FC and polymerase chain reaction (PCR) in 243 cases: concordant results were obtained in 199/243 samples (81·9%); 42/243 were FC-/PCR+. Overall, the sensitivity and specificity of FC compared to PCR was 96·5% and 77·2%, respectively. Both FC and PCR proved suitable for the detection of MRD and prediction of progression-free survival, which was significantly reduced in MRD-positive patients, regardless of the methodology. These results offer the rationale for a strategy to monitor MRD in CLL patients.
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Affiliation(s)
- Sara Raponi
- Haematology, Department of Cellular Biotechnologies and Haematology, Sapienza University, Rome, Italy
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Spina F, Rezzonico F, Farina L, Corradini P. Long-term molecular remission with lenalidomide treatment of relapsed chronic lymphocytic leukemia. Eur J Haematol 2013; 90:340-4. [DOI: 10.1111/ejh.12068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2012] [Indexed: 11/29/2022]
Affiliation(s)
- Francesco Spina
- Division of Hematology-Bone Marrow Transplatation; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan; Italy
| | | | - Lucia Farina
- Division of Hematology-Bone Marrow Transplatation; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan; Italy
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