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Mannonen L, Jokela P, Kragh Thomsen M, Yerly S, Cilla G, Jarem D, Canchola JA, Hopkins M. Performance of the cobas EBV and cobas BKV assays: multi-site comparison of standardized quantitation. J Clin Microbiol 2024; 62:e0026724. [PMID: 39046255 PMCID: PMC11323559 DOI: 10.1128/jcm.00267-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 06/21/2024] [Indexed: 07/25/2024] Open
Abstract
Guidelines recommend monitoring of Epstein-Barr virus (EBV) and BK virus (BKV) in solid organ and hematopoietic stem cell transplant patients. The majority of quantitative DNA testing for EBV and BKV employs unstandardized individual laboratory-developed testing solutions (LDTs), with implications for accuracy, reproducibility, and comparability between laboratories. The performance of the cobas EBV and cobas BKV assays was assessed across five laboratories, using the World Health Organization International Standards (WHO IS) for EBV and BKV, and the National Institute of Standards and Technology Quantitative Standard for BKV, and results were compared with the LDTs in use at the time. Methods were also compared using locally sourced clinical specimens. Variation was high when laboratories reported EBV or BKV DNA values using LDTs, where quantitative values were observed to differ by up to 1.5 log10 unit/mL between sites. Conversely, results from the cobas EBV and cobas BKV assays were accurate and reproducible across sites and on different testing days. Adjustment of LDTs using the international standards led to closer alignment between the assays; however, day-to-day reproducibility of LDTs remained high. In addition, BKV continued to show bias, indicating challenges with the commutability of the BKV International Standard. The cobas EBV and cobas BKV assays are automated, aligned to the WHO IS, and have the potential to reduce the variability in viral load testing introduced by differences in LDTs. Standardization of reporting values may eventually allow different centers to compare data to allow clinical decision thresholds to be established supporting improvements in patient management.IMPORTANCEThe application of center-specific cut-offs for clinical decisions and the variability of LDTs often hinder interpretation; thus, the findings reported here support the need for standardization in the field of post-transplant monitoring of EBV and BKV to improve patient management. Alongside the choice of assay, it is also important to consider which standard to use when deciding upon a testing methodology. This is a call to action for standardization, as treatment for EBV and BKV is driven by viral load test results, and the more accurate and comparable the test results are across institutions, the more informed and better the treatment decisions can be.
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Affiliation(s)
- Laura Mannonen
- Department of Clinical Microbiology, HUS Diagnostic Center, HUSLAB, Clinical Microbiology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Pia Jokela
- Department of Clinical Microbiology, HUS Diagnostic Center, HUSLAB, Clinical Microbiology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | | | - Sabine Yerly
- Laboratory of Virology, Diagnostic Department, Geneva University Hospitals, Geneva, Switzerland
| | - Gustavo Cilla
- Department of Microbiology, Donostia University Hospital and Biodonostia Health Research Institute, San Sebastián, Spain
| | - Daniel Jarem
- Clinical Development and Medical Affairs, Roche Molecular Systems, Inc., Pleasanton, California, USA
| | - Jesse A. Canchola
- CDMA Biometrics, Biostatistics Group, Roche Molecular Systems, Inc., Pleasanton, California, USA
| | - Mark Hopkins
- Department of Virology, Barts Health NHS Trust, London, United Kingdom
- Department of Infection and Immunity, Liverpool University Hospitals NHS Trust, Liverpool, United Kingdom
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Ratiu C, Dufresne SF, Thiant S, Roy J. Epstein-Barr Virus Monitoring after an Allogeneic Hematopoietic Stem Cell Transplant: Review of the Recent Data and Current Practices in Canada. Curr Oncol 2024; 31:2780-2795. [PMID: 38785492 PMCID: PMC11119229 DOI: 10.3390/curroncol31050211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/10/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024] Open
Abstract
Epstein-Barr virus-related post-transplantation lymphoproliferative disorder (EBV-PTLD) is a serious complication following hematopoietic stem cell transplantation (HSCT). A pre-emptive strategy using rituximab, which aims to manage patients early at the time of EBV reactivation to avoid PTLD, has been recommended by the most recent ECIL-6 guidelines in 2016. However, there is still a great heterogeneity of viral-load monitoring protocols, targeted patient populations, and pre-emptive treatment characteristics between centers, making precise EBV monitoring recommendations difficult. We conducted a literature review from the most recent publications between 1 January 2015 and 1 August 2023, to summarize the emerging data on EBV-PTLD prevention strategies in HSCT recipients, including the EBV-DNA threshold and use of rituximab. We also present the results of a survey of current practices carried out in 12 of the main HSCT centers across Canada. We confirm that pre-emptive rituximab remains an efficient strategy for EBV-PTLD prevention. However, there is an urgent need to perform prospective, randomized, multicentric trials with larger numbers of patients reflecting current practices to determine the best clinical conduct with regards to rituximab dosing, timing of treatment, and criteria to initiate treatments. Longer follow-ups will also be necessary to assess patients' long-term outcomes.
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Affiliation(s)
- Claire Ratiu
- Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Simon F. Dufresne
- Department of Microbiology, Infectious Diseases and Immunology, Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
- Division of Infectious Diseases and Clinical Microbiology, Department of Medicine, Maisonneuve-Rosemont Hospital, Montréal, QC H1T 2M4, Canada
- Centre de Recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada
| | - Stéphanie Thiant
- Centre de Recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Maisonneuve-Rosemont Hospital, 5415 de l’Assomption, Montréal, QC H1T 2M4, Canada
| | - Jean Roy
- Faculty of Medicine, Université de Montréal, Montréal, QC H3T 1J4, Canada
- Centre de Recherche de l’Hôpital Maisonneuve-Rosemont, Montréal, QC H1T 2M4, Canada
- Division of Hematology, Oncology and Transplantation, Department of Medicine, Maisonneuve-Rosemont Hospital, 5415 de l’Assomption, Montréal, QC H1T 2M4, Canada
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Preiksaitis J, Allen U, Bollard CM, Dharnidharka VR, Dulek DE, Green M, Martinez OM, Metes DM, Michaels MG, Smets F, Chinnock RE, Comoli P, Danziger-Isakov L, Dipchand AI, Esquivel CO, Ferry JA, Gross TG, Hayashi RJ, Höcker B, L'Huillier AG, Marks SD, Mazariegos GV, Squires J, Swerdlow SH, Trappe RU, Visner G, Webber SA, Wilkinson JD, Maecker-Kolhoff B. The IPTA Nashville Consensus Conference on Post-Transplant lymphoproliferative disorders after solid organ transplantation in children: III - Consensus guidelines for Epstein-Barr virus load and other biomarker monitoring. Pediatr Transplant 2024; 28:e14471. [PMID: 37294621 DOI: 10.1111/petr.14471] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/10/2022] [Accepted: 01/02/2023] [Indexed: 06/11/2023]
Abstract
The International Pediatric Transplant Association convened an expert consensus conference to assess current evidence and develop recommendations for various aspects of care relating to post-transplant lymphoproliferative disorders after solid organ transplantation in children. In this report from the Viral Load and Biomarker Monitoring Working Group, we reviewed the existing literature regarding the role of Epstein-Barr viral load and other biomarkers in peripheral blood for predicting the development of PTLD, for PTLD diagnosis, and for monitoring of response to treatment. Key recommendations from the group highlighted the strong recommendation for use of the term EBV DNAemia instead of "viremia" to describe EBV DNA levels in peripheral blood as well as concerns with comparison of EBV DNAemia measurement results performed at different institutions even when tests are calibrated using the WHO international standard. The working group concluded that either whole blood or plasma could be used as matrices for EBV DNA measurement; optimal specimen type may be clinical context dependent. Whole blood testing has some advantages for surveillance to inform pre-emptive interventions while plasma testing may be preferred in the setting of clinical symptoms and treatment monitoring. However, EBV DNAemia testing alone was not recommended for PTLD diagnosis. Quantitative EBV DNAemia surveillance to identify patients at risk for PTLD and to inform pre-emptive interventions in patients who are EBV seronegative pre-transplant was recommended. In contrast, with the exception of intestinal transplant recipients or those with recent primary EBV infection prior to SOT, surveillance was not recommended in pediatric SOT recipients EBV seropositive pre-transplant. Implications of viral load kinetic parameters including peak load and viral set point on pre-emptive PTLD prevention monitoring algorithms were discussed. Use of additional markers, including measurements of EBV specific cell mediated immunity was discussed but not recommended though the importance of obtaining additional data from prospective multicenter studies was highlighted as a key research priority.
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Affiliation(s)
- Jutta Preiksaitis
- Division of Infectious Diseases, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Upton Allen
- Division of Infectious Diseases and the Transplant and Regenerative Medicine Center, Department of Paediatrics, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | - Catherine M Bollard
- Center for Cancer and Immunology Research, Children's National Hospital, The George Washington University, Washington, District of Columbia, USA
| | - Vikas R Dharnidharka
- Department of Pediatrics, Division of Pediatric Nephrology, Hypertension & Pheresis, Washington University School of Medicine & St. Louis Children's Hospital, St. Louis, Missouri, USA
| | - Daniel E Dulek
- Division of Pediatric Infectious Diseases, Monroe Carell Jr. Children's Hospital at Vanderbilt and Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Michael Green
- Division of Pediatric Infectious Diseases, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Olivia M Martinez
- Department of Surgery and Program in Immunology, Stanford University School of Medicine, Stanford, California, USA
| | - Diana M Metes
- Departments of Surgery and Immunology, Thomas E. Starzl Transplantation Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Marian G Michaels
- Division of Pediatric Infectious Diseases, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Françoise Smets
- Pediatric Gastroenterology and Hepatology, Cliniques Universitaires Saint-Luc, UCLouvain, Brussels, Belgium
| | | | - Patrizia Comoli
- Cell Factory & Pediatric Hematology/Oncology, Fondazione IRCCS Policlinico, Pavia, Italy
| | - Lara Danziger-Isakov
- Division of Infectious Disease, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Anne I Dipchand
- Labatt Family Heart Centre, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada
| | | | - Judith A Ferry
- Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Thomas G Gross
- Center for Cancer and Blood Diseases, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Robert J Hayashi
- Division of Pediatric Hematology/Oncology, St. Louis Children's Hospital, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Britta Höcker
- University Children's Hospital, Pediatrics I, Heidelberg, Germany
| | - Arnaud G L'Huillier
- Faculty of Medicine, Pediatric Infectious Diseases Unit and Laboratory of Virology, Geneva University Hospitals, Geneva, Switzerland
| | - Stephen D Marks
- Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
- NIHR Great Ormond Street Hospital Biomedical Research Centre, University College London, Great Ormond Street Institute of Child Health, London, UK
| | - George Vincent Mazariegos
- Department of Surgery, Hillman Center for Pediatric Transplantation, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - James Squires
- Division of Gastroenterology, Hepatology and Nutrition, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Steven H Swerdlow
- Division of Hematopathology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Ralf U Trappe
- Department of Hematology and Oncology, DIAKO Ev. Diakonie-Krankenhaus Bremen, Bremen, Germany
- Department of Internal Medicine II: Hematology and Oncology, University Medical Centre Schleswig-Holstein, Kiel, Germany
| | - Gary Visner
- Division of Pulmonary Medicine, Boston Children's Hospital/Harvard Medical School, Boston, Massachusetts, USA
| | - Steven A Webber
- Department of Pediatrics, Vanderbilt School of Medicine, Nashville, Tennessee, USA
| | - James D Wilkinson
- Department of Pediatrics, Vanderbilt School of Medicine, Nashville, Tennessee, USA
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Yamada M, Chen SF, Green M. Chronic Epstein-Barr viral load carriage after pediatric organ transplantation. Front Pediatr 2024; 12:1335496. [PMID: 38357509 PMCID: PMC10864438 DOI: 10.3389/fped.2024.1335496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 01/09/2024] [Indexed: 02/16/2024] Open
Abstract
Epstein-Barr virus (EBV) infection and EBV-associated post-transplant lymphoproliferative disorder (EBV/PTLD) is one of the most devastating complications occurring in pediatric solid organ transplant (SOT) recipients. Observations of SOT recipients undergoing serial EBV monitoring to inform reduction of immune suppression to prevent EBV-/PTLD has identified patients who maintain chronic high EBV load (CHL) in their blood. The CHL carrier state has been seen more commonly in pediatric compared to adult transplant recipients. Some but not all CHL may progress to EBV/PTLD. However, little is known regarding the biology of this CHL carrier state and the optimal clinical approach to CHL has not been established. This review summarizes the current knowledge and evidence of chronic high EBV load and introduces commonly adopted approaches from experts in this field.
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Affiliation(s)
- Masaki Yamada
- National Center for Child Health and Development (NCCHD), Tokyo, Japan
| | - Sharon F. Chen
- Department of Pediatrics, Stanford University, Palo Alto, CA, United States
| | - Michael Green
- Departments of Pediatrics and Surgery, University of Pittsburgh, Pittsburgh, PA, United States
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5
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Storek J, Lindsay J. Rituximab for posttransplant lymphoproliferative disorder - therapeutic, preemptive, or prophylactic? Bone Marrow Transplant 2024; 59:6-11. [PMID: 38001229 DOI: 10.1038/s41409-023-02155-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 10/31/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023]
Abstract
To minimize mortality due to posttransplant lymphoproliferative disorder (PTLD), the following strategies have been used: (1) Therapy without EBV Monitoring, i.e., administration of rituximab after PTLD diagnosis, usually by biopsy, in the absence of routine Epstein-Barr virus (EBV) DNAemia monitoring, (2) Prompt Therapy, i.e., monitoring EBV DNAemia, searching for PTLD by imaging when the DNAemia has exceeded a pre-specified threshold, and administration of rituximab if the imaging is consistent with PTLD, (3) Preemptive Therapy, i.e., monitoring EBV DNAemia and administration of rituximab when the DNAemia has exceeded a pre-specified threshold, and (4) Prophylaxis, i.e., administration of rituximab to all transplant recipients. The superiority of one of these strategies over the other strategies has not been established. Here we review the pros and cons of each strategy. Preemptive therapy or prophylaxis may currently be preferred for patients who are at a high risk of dying due to PTLD. However, Therapy without EBV Monitoring may be used for both high- and low-risk patients in the future, if effective and relatively non-toxic therapies for rituximab-refractory PTLD (e.g., EBV-specific T cells) have become easily available.
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Affiliation(s)
- Jan Storek
- University of Calgary, Calgary, AB, Canada.
| | - Julian Lindsay
- Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- National Centre for Infection in Cancer and Transplantation, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia
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6
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Patrucco F, Curtoni A, Sidoti F, Zanotto E, Bondi A, Albera C, Boffini M, Cavallo R, Costa C, Solidoro P. Herpes Virus Infection in Lung Transplantation: Diagnosis, Treatment and Prevention Strategies. Viruses 2023; 15:2326. [PMID: 38140567 PMCID: PMC10747259 DOI: 10.3390/v15122326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/12/2023] [Accepted: 11/14/2023] [Indexed: 12/24/2023] Open
Abstract
Lung transplantation is an ultimate treatment option for some end-stage lung diseases; due to the intense immunosuppression needed to reduce the risk of developing acute and chronic allograft failure, infectious complications are highly incident. Viral infections represent nearly 30% of all infectious complications, with herpes viruses playing an important role in the development of acute and chronic diseases. Among them, cytomegalovirus (CMV) is a major cause of morbidity and mortality, being associated with an increased risk of chronic lung allograft failure. Epstein-Barr virus (EBV) is associated with transformation of infected B cells with the development of post-transplantation lymphoproliferative disorders (PTLDs). Similarly, herpes simplex virus (HSV), varicella zoster virus and human herpesviruses 6 and 7 can also be responsible for acute manifestations in lung transplant patients. During these last years, new, highly sensitive and specific diagnostic tests have been developed, and preventive and prophylactic strategies have been studied aiming to reduce and prevent the incidence of these viral infections. In this narrative review, we explore epidemiology, diagnosis and treatment options for more frequent herpes virus infections in lung transplant patients.
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Affiliation(s)
- Filippo Patrucco
- Respiratory Diseases Unit, Medical Department, AOU Maggiore della Carità di Novara, Corso Mazzini 18, 28100 Novara, Italy
| | - Antonio Curtoni
- Division of Virology, Department of Public Health and Pediatrics, University of Turin, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
| | - Francesca Sidoti
- Division of Virology, Department of Public Health and Pediatrics, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
| | - Elisa Zanotto
- Division of Virology, Department of Public Health and Pediatrics, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
| | - Alessandro Bondi
- Division of Virology, Department of Public Health and Pediatrics, University of Turin, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
| | - Carlo Albera
- Division of Respiratory Medicine, Cardiovascular and Thoracic Department, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
- Medical Sciences Department, University of Turin, 10126 Turin, Italy
| | - Massimo Boffini
- Cardiac Surgery Division, Surgical Sciences Department, AOU Città della Salute e della Scienza di Torino, University of Turin, 10126 Turin, Italy
| | - Rossana Cavallo
- Division of Virology, Department of Public Health and Pediatrics, University of Turin, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
| | - Cristina Costa
- Division of Virology, Department of Public Health and Pediatrics, University of Turin, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
| | - Paolo Solidoro
- Division of Respiratory Medicine, Cardiovascular and Thoracic Department, AOU Città della Salute e della Scienza di Torino, 10126 Turin, Italy
- Medical Sciences Department, University of Turin, 10126 Turin, Italy
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7
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Atamna A, Yahav D, Hirzel C. Prevention of Oncogenic Gammaherpesvirinae (EBV and HHV8) Associated Disease in Solid Organ Transplant Recipients. Transpl Int 2023; 36:11856. [PMID: 38046068 PMCID: PMC10689273 DOI: 10.3389/ti.2023.11856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 11/07/2023] [Indexed: 12/05/2023]
Abstract
Long-term risk for malignancy is higher among solid organ transplant (SOT) recipients compared to the general population. Four non-hepatitis viruses have been recognized as oncogenic in SOT recipients-EBV, cause of EBV-associated lymphoproliferative diseases; human herpes virus 8 (HHV8), cause of Kaposi sarcoma, primary effusion lymphoma and multicentric Castleman disease; human papilloma virus, cause of squamous cell skin cancers, and Merkel cell polyomavirus, cause of Merkel cell carcinoma. Two of these viruses (EBV and HHV8) belong to the human herpes virus family. In this review, we will discuss key aspects regarding the clinical presentation, diagnosis, treatment, and prevention of diseases in SOT recipients associated with the two herpesviruses.
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Affiliation(s)
- Alaa Atamna
- Infectious Diseases Unit, Rabin Medical Center, Beilinson Hospital, Petah-Tikva, Israel
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
| | - Dafna Yahav
- Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel
- Infectious Diseases Unit, Sheba Medical Center, Ramat-Gan, Israel
| | - Cédric Hirzel
- Department of Infectious Diseases, Bern University Hospital, University of Bern, Bern, Switzerland
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8
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Jiang C, Zheng X, Lin L, Li X, Li X, Liao Y, Jia W, Shu B. CRISPR Cas12a-mediated amplification-free digital DNA assay improves the diagnosis and surveillance of Nasopharyngeal carcinoma. Biosens Bioelectron 2023; 237:115546. [PMID: 37523811 DOI: 10.1016/j.bios.2023.115546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 06/28/2023] [Accepted: 07/21/2023] [Indexed: 08/02/2023]
Abstract
Sensitive and accurate cell-free plasma Epstein-Barr virus (EBV) DNA measurement is essential in the routine diagnosis, monitoring and treatment of Nasopharyngeal Carcinoma (NPC). This measurement in commercial and in-house assay are commonly based on real-time quantitative PCR (qPCR) method, which requires reference materials for standardization and lack quantitative precision due to amplification bias or cross-contamination. To address these issues, we developed a CRISPR/Cas12a-mediated amplification-free digital DNA assay, which targets the repetitive sequences of EBV DNA and utilizes the cis-cleavage activity of CRISPR-Cas12a prior to droplet generation. By this mean, more activated Cas12a-crRNA duplexes could be produced for subsequent target detection and counting, thus improving the performance in detecting low EBV DNA load. We demonstrated that it was more robust than conventional qPCR for detecting plasma EBV DNA in a case-control study of 208 participants, especially when the target concentrations were around the diagnostic cut-off value for NPC. More importantly, this assay allowed a more accurate diagnosis of early-stage NPC, with an area under the curve (AUC) of 0.9883 (versus 0.7682 for qPCR). Furthermore, its absolute quantification capability enabled dynamic monitoring of EBV load in NPC patients during initial diagnosis, treatment, and recurrence, thereby potentially improving disease management and prognosis. Taken together, our results demonstrate that this amplification-free digital assay has the potential to be a robust tool to improve the diagnosis and surveillance of NPC.
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Affiliation(s)
- Chengtao Jiang
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Xiaohui Zheng
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Ling Lin
- School of Medicine, South China University of Technology, Guangzhou, 510180, China
| | - Xinying Li
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Xizhao Li
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Ying Liao
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China
| | - Weihua Jia
- State Key Laboratory of Oncology in South China, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, 510060, China.
| | - Bowen Shu
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China.
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9
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Elalouf A. Infections after organ transplantation and immune response. Transpl Immunol 2023; 77:101798. [PMID: 36731780 DOI: 10.1016/j.trim.2023.101798] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 01/08/2023] [Accepted: 01/26/2023] [Indexed: 01/31/2023]
Abstract
Organ transplantation has provided another chance of survival for end-stage organ failure patients. Yet, transplant rejection is still a main challenging factor. Immunosuppressive drugs have been used to avoid rejection and suppress the immune response against allografts. Thus, immunosuppressants increase the risk of infection in immunocompromised organ transplant recipients. The infection risk reflects the relationship between the nature and severity of immunosuppression and infectious diseases. Furthermore, immunosuppressants show an immunological impact on the genetics of innate and adaptive immune responses. This effect usually reactivates the post-transplant infection in the donor and recipient tissues since T-cell activation has a substantial role in allograft rejection. Meanwhile, different infections have been found to activate the T-cells into CD4+ helper T-cell subset and CD8+ cytotoxic T-lymphocyte that affect the infection and the allograft. Therefore, the best management and preventive strategies of immunosuppression, antimicrobial prophylaxis, and intensive medical care are required for successful organ transplantation. This review addresses the activation of immune responses against different infections in immunocompromised individuals after organ transplantation.
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Affiliation(s)
- Amir Elalouf
- Bar-Ilan University, Department of Management, Ramat Gan 5290002, Israel.
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10
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Palavecino EL, Ridley T, Hester L, Blosser SJ. Analytical evaluation of the cobas® 6800 system for the detection and quantification of BK Virus (BKV) and Epstein Barr Virus (EBV) at a US solid organ and hematopoietic stem cell transplant center. Diagn Microbiol Infect Dis 2023; 105:115884. [PMID: 36630742 DOI: 10.1016/j.diagmicrobio.2022.115884] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/08/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
The cobas® EBV and BKV assays are the first FDA-approved, quantitative assays for monitoring posttransplant reactivation of these viruses. In this study, we assessed performance of the fully-automated cobas® assays, compared with Diasorin Molecular ASR, our laboratory developed test, and demonstrated a strong interassay correlation for BK and EBV monitoring.
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Affiliation(s)
- Elizabeth L Palavecino
- Department of Pathology, Wake Forest School of Medicine, Winston Salem, NC, USA; Department of Pathology, Atrium Health -Wake Forest Baptist, Winston Salem, NC, USA.
| | - Tonika Ridley
- Department of Pathology, Atrium Health -Wake Forest Baptist, Winston Salem, NC, USA
| | - Louise Hester
- Department of Pathology, Atrium Health -Wake Forest Baptist, Winston Salem, NC, USA
| | - Sara J Blosser
- Medical and Scientific Affairs, Roche Diagnostics Corporation, Indianapolis, IN, USA
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11
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Lupo J, Truffot A, Andreani J, Habib M, Epaulard O, Morand P, Germi R. Virological Markers in Epstein–Barr Virus-Associated Diseases. Viruses 2023; 15:v15030656. [PMID: 36992365 PMCID: PMC10051789 DOI: 10.3390/v15030656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/21/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Epstein–Barr virus (EBV) is an oncogenic virus infecting more than 95% of the world’s population. After primary infection—responsible for infectious mononucleosis in young adults—the virus persists lifelong in the infected host, especially in memory B cells. Viral persistence is usually without clinical consequences, although it can lead to EBV-associated cancers such as lymphoma or carcinoma. Recent reports also suggest a link between EBV infection and multiple sclerosis. In the absence of vaccines, research efforts have focused on virological markers applicable in clinical practice for the management of patients with EBV-associated diseases. Nasopharyngeal carcinoma is an EBV-associated malignancy for which serological and molecular markers are widely used in clinical practice. Measuring blood EBV DNA load is additionally, useful for preventing lymphoproliferative disorders in transplant patients, with this marker also being explored in various other EBV-associated lymphomas. New technologies based on next-generation sequencing offer the opportunity to explore other biomarkers such as the EBV DNA methylome, strain diversity, or viral miRNA. Here, we review the clinical utility of different virological markers in EBV-associated diseases. Indeed, evaluating existing or new markers in EBV-associated malignancies or immune-mediated inflammatory diseases triggered by EBV infection continues to be a challenge.
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Affiliation(s)
- Julien Lupo
- Institut de Biologie Structurale, Université Grenoble Alpes, UMR 5075 CEA/CNRS/UGA, 71 Avenue des Martyrs, 38000 Grenoble, France
- Laboratoire de Virologie, CHU Grenoble Alpes, CS 10217, CEDEX 09, 38043 Grenoble, France
- Correspondence:
| | - Aurélie Truffot
- Institut de Biologie Structurale, Université Grenoble Alpes, UMR 5075 CEA/CNRS/UGA, 71 Avenue des Martyrs, 38000 Grenoble, France
- Laboratoire de Virologie, CHU Grenoble Alpes, CS 10217, CEDEX 09, 38043 Grenoble, France
| | - Julien Andreani
- Institut de Biologie Structurale, Université Grenoble Alpes, UMR 5075 CEA/CNRS/UGA, 71 Avenue des Martyrs, 38000 Grenoble, France
- Laboratoire de Virologie, CHU Grenoble Alpes, CS 10217, CEDEX 09, 38043 Grenoble, France
| | - Mohammed Habib
- Institut de Biologie Structurale, Université Grenoble Alpes, UMR 5075 CEA/CNRS/UGA, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Olivier Epaulard
- Institut de Biologie Structurale, Université Grenoble Alpes, UMR 5075 CEA/CNRS/UGA, 71 Avenue des Martyrs, 38000 Grenoble, France
- Service de Maladies Infectieuses, CHU Grenoble Alpes, CS 10217, CEDEX 09, 38043 Grenoble, France
| | - Patrice Morand
- Institut de Biologie Structurale, Université Grenoble Alpes, UMR 5075 CEA/CNRS/UGA, 71 Avenue des Martyrs, 38000 Grenoble, France
- Laboratoire de Virologie, CHU Grenoble Alpes, CS 10217, CEDEX 09, 38043 Grenoble, France
| | - Raphaële Germi
- Institut de Biologie Structurale, Université Grenoble Alpes, UMR 5075 CEA/CNRS/UGA, 71 Avenue des Martyrs, 38000 Grenoble, France
- Laboratoire de Virologie, CHU Grenoble Alpes, CS 10217, CEDEX 09, 38043 Grenoble, France
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12
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Stelzl E, Kessler HH, Parulekar AD, Bier C, Nörz D, Schneider T, Kumar S, Simon CO, Lütgehetmann M. Comparison of four commercial EBV DNA quantitative tests to a new test at an early stage of development. J Clin Virol 2023; 161:105400. [PMID: 36796282 DOI: 10.1016/j.jcv.2023.105400] [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: 12/07/2022] [Revised: 01/27/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023]
Abstract
BACKGROUND Regular screening for Epstein-Barr virus (EBV) DNA using quantitative RT-PCR is recommended for early intervention in at-risk patients. Harmonization of quantitative RT-PCR assays is critical to avoid misinterpretation of results. Here, we compare quantitative results of the cobas® EBV assay to four commercial RT-qPCR assays. METHODS The cobas EBV, EBV R-Gene, artus EBV RG PCR, RealStar EBV PCR kit 2.0 and Abbott EBV RealTime assays were compared for analytic performance using a 10-fold dilution series of EBV reference material, normalized to the WHO standard. For clinical performance, their quantitative results were compared using anonymized, leftover EBV-DNA-positive EDTA plasma samples. RESULTS For analytic accuracy, the cobas EBV deviated -0.0097 log10 from target values. The other tests showed deviations between 0.0037 and -0.12 log10. For clinical performance, accuracy and linearity of cobas EBV data from both study sites were excellent. Bland-Altman bias and Deming regression analyses showed statistical correlation for cobas EBV to both EBV R-Gene and Abbott RealTime assays but an offset of cobas EBV to artus EBV RG PCR and RealStar EBV PCR kit 2.0. CONCLUSION The cobas EBV showed the closest correlation to the reference material, followed closely by EBV R-Gene and Abbott EBV RealTime. Values obtained are stated in IU/mL, facilitating comparison across testing sites and potentially improving utilization of guidelines for diagnosis, monitoring, and treatment of patients.
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Affiliation(s)
- Evelyn Stelzl
- Research Unit Molecular Diagnostics, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, 8010, Austria
| | - Harald H Kessler
- Research Unit Molecular Diagnostics, Diagnostic and Research Center for Molecular Biomedicine, Medical University of Graz, Graz, 8010, Austria.
| | | | - Carolin Bier
- Roche Diagnostics International AG, Rotkreuz, Switzerland
| | - Dominik Nörz
- University Hospital Eppendorf (UKE), Institute of Medical Microbiology, Virology and Hygiene, Hamburg, Germany
| | | | - Suchitra Kumar
- Roche Diagnostics International AG, Rotkreuz, Switzerland
| | | | - Marc Lütgehetmann
- University Hospital Eppendorf (UKE), Institute of Medical Microbiology, Virology and Hygiene, Hamburg, Germany
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13
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Lupo J, Wielandts AS, Buisson M, Consortium CRYOSTEM, Habib M, Hamoudi M, Morand P, Verduyn-Lunel F, Caillard S, Drouet E. High Predictive Value of the Soluble ZEBRA Antigen (Epstein-Barr Virus Trans-Activator Zta) in Transplant Patients with PTLD. Pathogens 2022; 11:pathogens11080928. [PMID: 36015048 PMCID: PMC9413454 DOI: 10.3390/pathogens11080928] [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: 03/14/2022] [Revised: 07/28/2022] [Accepted: 08/03/2022] [Indexed: 11/16/2022] Open
Abstract
The ZEBRA (Z EBV replication activator) protein is the major transcription factor of EBV, expressed upon EBV lytic cycle activation. An increasing body of studies have highlighted the critical role of EBV lytic infection as a risk factor for lymphoproliferative disorders, such as post-transplant lymphoproliferative disease (PTLD). We studied 108 transplanted patients (17 PTLD and 91 controls), retrospectively selected from different hospitals in France and in the Netherlands. The majority of PTLD were EBV-positive diffuse large B-cell lymphomas, five patients experienced atypical PTLD forms (EBV-negative lymphomas, Hodgkin’s lymphomas, and T-cell lymphomas). Fourteen patients among the seventeen who developed a pathologically confirmed PTLD were sZEBRA positive (soluble ZEBRA, plasma level above 20 ng/mL, measured by an ELISA test). The specificity and positive predictive value (PPV) of the sZEBRA detection in plasma were 98% and 85%, respectively. Considering a positivity threshold of 20 ng/mL, the sensitivity of the sZEBRA was 82.35% and the specificity was 94.51%. The mean of the sZEBRA values in the PTLD cases were significantly higher than in the controls (p < 0.0001). The relevance of the lytic cycle and, particularly, the role of ZEBRA in lymphomagenesis is a new paradigm pertaining to the prevention and treatment strategies for PTLD. Given the high-specificity and the predictive values of this test, it now appears relevant to investigate the lytic EBV infection in transplanted patients as a prognostic biomarker.
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Affiliation(s)
- Julien Lupo
- Institut de Biologie Structurale, Université Grenoble-Alpes, 38000 Grenoble, France
- Laboratoire de Virologie, Institut de Biologie-Pathologie, Centre Hospitalier Universitaire Grenoble Alpes, 38000 Grenoble, France
| | - Anne-Sophie Wielandts
- Laboratoire de Virologie, Institut de Biologie-Pathologie, Centre Hospitalier Universitaire Grenoble Alpes, 38000 Grenoble, France
| | - Marlyse Buisson
- Institut de Biologie Structurale, Université Grenoble-Alpes, 38000 Grenoble, France
- Laboratoire de Virologie, Institut de Biologie-Pathologie, Centre Hospitalier Universitaire Grenoble Alpes, 38000 Grenoble, France
| | - CRYOSTEM Consortium
- CRYOSTEM Consortium: Marseille Innovation—Hôtel Technologique, 13382 Marseille, France
| | - Mohammed Habib
- Laboratoire de Virologie, Institut de Biologie-Pathologie, Centre Hospitalier Universitaire Grenoble Alpes, 38000 Grenoble, France
| | - Marwan Hamoudi
- Institut de Biologie Structurale, Université Grenoble-Alpes, 38000 Grenoble, France
| | - Patrice Morand
- Institut de Biologie Structurale, Université Grenoble-Alpes, 38000 Grenoble, France
- Laboratoire de Virologie, Institut de Biologie-Pathologie, Centre Hospitalier Universitaire Grenoble Alpes, 38000 Grenoble, France
| | | | - Sophie Caillard
- Département de Néphrologie et de Transplantation Centre, Hospitalier Universitaire de Strasbourg, 67091 Strasbourg, France
| | - Emmanuel Drouet
- Institut de Biologie Structurale, Université Grenoble-Alpes, 38000 Grenoble, France
- Correspondence:
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14
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Epstein-Barr virus posttransplant lymphoproliferative disorder: update on management and outcomes. Curr Opin Infect Dis 2021; 34:635-645. [PMID: 34751183 PMCID: PMC8589110 DOI: 10.1097/qco.0000000000000787] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW Management of Epstein-Barr virus posttransplant lymphoproliferative disorder (EBV PTLD) is complex, involving risk stratification, prevention and/or preemptive measures involving monitoring EBV DNAemia and balancing treatment options, using a combination of reduction of immune suppression, anti-B cell therapy, and cytotoxic T lymphocytes (CTLs). RECENT FINDINGS The highest risk factor for the development of EBV PTLD in hematopoietic cell transplant (HCT) remains T cell depletion, with increasing use of antithymocyte globulin (ATG) or alemtuzumab in conditioning. In solid organ transplantation (SOT), the incidence of PTLD is highest among EBV seronegative recipients who are at risk for primary EBV infection following transplant in the first 12 months. Prevention is a critical component of the management of EBV PTLD. Although preemptive therapy remains standard of care, there continues to be heterogenicity and debate over the optimal choice of EBV DNA quantification and the threshold to use. Novel therapies such as donor-derived multipathogen and EBV specific CTLs for the prevention and third party CTLs for the treatment of EBV PTLD are promising, with rapidly expanding evidence, including large scale Phase III trials currently underway. SUMMARY With an increasing number of risk groups for developing EBV PTLD in HCT and SOT, management strategies using prophylaxis or preemptive therapy remain standard of care, however the use of prophylactic or preemptive EBV specific or multipathogen CTLs show promising results and safety profiles.
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15
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Post-transplantation lymphoproliferative disorder after haematopoietic stem cell transplantation. Ann Hematol 2021; 100:865-878. [PMID: 33547921 DOI: 10.1007/s00277-021-04433-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 01/18/2021] [Indexed: 12/19/2022]
Abstract
Post-transplantation lymphoproliferative disorder (PTLD) is a severe complication of haematopoietic stem cell transplantation (HSCT), occurring in a setting of immune suppression and dysregulation. The disease is in most cases driven by the reactivation of the Epstein-Barr virus (EBV), which induces B cell proliferation through different pathomechanisms. Beyond EBV, many factors, variably dependent on HSCT-related immunosuppression, contribute to the disease development. PTLDs share several features with primary lymphomas, though clinical manifestations may be different, frequently depending on extranodal involvement. According to the WHO classification, histologic examination is required for diagnosis, allowing also to distinguish among PTLD subtypes. However, in cases of severe and abrupt presentation, a diagnosis based on a combination of imaging studies and EBV-load determination is accepted. Therapies include prophylactic and pre-emptive interventions, aimed at eradicating EBV proliferation before symptoms onset, and targeted treatments. Among them, rituximab has emerged as first-line option, possibly combined with a reduction of immunosuppression, while EBV-specific cytotoxic T lymphocytes are effective and safe alternatives. Though prognosis remains poor, survival has markedly improved following the adoption of the aforementioned treatments. The validation of innovative, combined approaches is the future challenge.
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16
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Mehra V, Rhone E, Widya S, Zuckerman M, Potter V, Raj K, Kulasekararaj A, McLornan D, de Lavallade H, Benson-Quarm N, Lim C, Ware S, Sudhanva M, Malik O, Nicholas R, Muraro PA, Marsh J, Mufti GJ, Silber E, Pagliuca A, Kazmi MA. Epstein-Barr Virus and Monoclonal Gammopathy of Clinical Significance in Autologous Stem Cell Transplantation for Multiple Sclerosis. Clin Infect Dis 2020; 69:1757-1763. [PMID: 30980715 DOI: 10.1093/cid/ciz047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Accepted: 01/14/2019] [Indexed: 12/24/2022] Open
Abstract
INTRODUCTION Autologous hematopoietic stem cell transplantation (AHSCT) with anti-thymocyte globulin (ATG) conditioning as treatment of active multiple sclerosis (MS) is rapidly increasing across Europe (EBMT registry data 2017). Clinically significant Epstein-Barr virus reactivation (EBV-R) following AHSCT with ATG for severe autoimmune conditions is an underrecognized complication relative to T-cell deplete transplants performed for hematological diseases. This retrospective study reports EBV-R associated significant clinical sequelae in MS patients undergoing AHSCT with rabbit ATG. METHODS Retrospective data were analyzed for 36 consecutive MS-AHSCT patients at Kings College Hospital, London. All patients routinely underwent weekly EBV DNA polymerase chain reaction monitoring and serum electrophoresis for monoclonal gammopathy (MG or M-protein). EBV-R with rising Epstein-Barr viral load, M-protein, and associated clinical sequelae were captured from clinical records. RESULTS All patients had evidence of rising EBV DNA-emia, including 7 who were lost to long-term follow-up, with a number of them developing high EBV viral load and associated lymphoproliferative disorder (LPD). Nearly 72% (n = 18/29) developed de novo MG, some with significant neurological consequences with high M-protein and EBV-R. Six patients required anti-CD20 therapy (rituximab) with complete resolution of EBV related symptoms. Receiver operating characteristics estimated a peak EBV viremia of >500 000 DNA copies/mL correlated with high sensitivity (85.5%) and specificity (82.5%) (area under the curve: 0.87; P = .004) in predicting EBV-R related significant clinical events. CONCLUSION Symptomatic EBV reactivation increases risk of neurological sequelae and LPD in MS-AHSCT. We recommend regular monitoring for EBV and serum electrophoresis for MG in MS patients in the first 3 months post-AHSCT.
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Affiliation(s)
- Varun Mehra
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Elijah Rhone
- Department of Neurology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Stefani Widya
- GKT School of Medical Education, Kings College London University
| | - Mark Zuckerman
- Department of Virology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Victoria Potter
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Kavita Raj
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill.,Department of Hematology, Guy's and St. Thomas' NHS Foundation Trust
| | - Austin Kulasekararaj
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Donal McLornan
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill.,Department of Hematology, Guy's and St. Thomas' NHS Foundation Trust
| | - Hugues de Lavallade
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Nana Benson-Quarm
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Christina Lim
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Sarah Ware
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Malur Sudhanva
- Department of Virology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Omar Malik
- Department of Neurology, Imperial College Healthcare, United Kingdom
| | - Richard Nicholas
- Department of Neurology, Imperial College Healthcare, United Kingdom
| | - Paolo A Muraro
- Department of Neurology, Imperial College Healthcare, United Kingdom.,Department of Neuroimmunology, Imperial College London, United Kingdom
| | - Judith Marsh
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Ghulam J Mufti
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Eli Silber
- Department of Neurology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Antonio Pagliuca
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill
| | - Majid A Kazmi
- Department of Hematology, King's College Hospital NHS Foundation Trust, Denmark Hill.,Department of Hematology, Guy's and St. Thomas' NHS Foundation Trust
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17
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Roberts MB, Fishman JA. Immunosuppressive Agents and Infectious Risk in Transplantation: Managing the "Net State of Immunosuppression". Clin Infect Dis 2020; 73:e1302-e1317. [PMID: 32803228 DOI: 10.1093/cid/ciaa1189] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Indexed: 12/14/2022] Open
Abstract
Successful solid organ transplantation reflects meticulous attention to the details of immunosuppression, balancing risks for graft rejection against risks for infection. The 'net state of immune suppression' is a conceptual framework of all factors contributing to infectious risk. Assays which measure immune function in the immunosuppressed transplant recipient relative to infectious risk and allograft function are lacking. The best measures of integrated immune function may be quantitative viral loads to assess the individual's ability to control latent viral infections. Few studies address adjustment of immunosuppression during active infections. Thus, confronted with infection in solid organ recipients, the management of immunosuppression is based largely on clinical experience. This review examines known measures of immune function and the immunologic effects of common immunosuppressive drugs and available studies reporting modification of drug regimens for specific infections. These data provide a conceptual framework for the management of immunosuppression during infection in organ recipients.
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Affiliation(s)
- Matthew B Roberts
- Transplant Infectious Disease and Compromised Host Program and Transplant Center, Massachusetts General Hospital, Boston MA
| | - Jay A Fishman
- Transplant Infectious Disease and Compromised Host Program and Transplant Center, Massachusetts General Hospital, Boston MA.,Harvard Medical School, Boston, MA
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18
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Abbas F, El Kossi M, Shaheen IS, Sharma A, Halawa A. Post-transplantation lymphoproliferative disorders: Current concepts and future therapeutic approaches. World J Transplant 2020; 10:29-46. [PMID: 32226769 PMCID: PMC7093305 DOI: 10.5500/wjt.v10.i2.29] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/21/2019] [Accepted: 12/14/2019] [Indexed: 02/05/2023] Open
Abstract
Transplant recipients are vulnerable to a higher risk of malignancy after solid organ transplantation and allogeneic hematopoietic stem-cell transplant. Post-transplant lymphoproliferative disorders (PTLD) include a wide spectrum of diseases ranging from benign proliferation of lymphoid tissues to frank malignancy with aggressive behavior. Two main risk factors of PTLD are: Firstly, the cumulative immunosuppressive burden, and secondly, the oncogenic impact of the Epstein-Barr virus. The latter is a key pathognomonic driver of PTLD evolution. Over the last two decades, a considerable progress has been made in diagnosis and therapy of PTLD. The treatment of PTLD includes reduction of immunosuppression, rituximab therapy, either isolated or in combination with other chemotherapeutic agents, adoptive therapy, surgical intervention, antiviral therapy and radiotherapy. In this review we shall discuss the prevalence, clinical clues, prophylactic measures as well as the current and future therapeutic strategies of this devastating disorder.
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Affiliation(s)
- Fedaey Abbas
- Nephrology Department, Jaber El Ahmed Military Hospital, Safat 13005, Kuwait
- Faculty of Health and Science, University of Liverpool, Institute of Learning and Teaching, School of Medicine, Liverpool L69 3GB, United Kingdom
| | - Mohsen El Kossi
- Faculty of Health and Science, University of Liverpool, Institute of Learning and Teaching, School of Medicine, Liverpool L69 3GB, United Kingdom
- Doncaster Royal Infirmary, Doncaster DN2 5LT, United Kingdom
| | - Ihab Sakr Shaheen
- Faculty of Health and Science, University of Liverpool, Institute of Learning and Teaching, School of Medicine, Liverpool L69 3GB, United Kingdom
- Department of Paediatric Nephrology, Royal Hospital for Children, Glasgow G51 4TF, United Kingdom
| | - Ajay Sharma
- Faculty of Health and Science, University of Liverpool, Institute of Learning and Teaching, School of Medicine, Liverpool L69 3GB, United Kingdom
- Department of Transplant Surgery, Royal Liverpool University Hospitals, Liverpool L7 8XP, United Kingdom
| | - Ahmed Halawa
- Faculty of Health and Science, University of Liverpool, Institute of Learning and Teaching, School of Medicine, Liverpool L69 3GB, United Kingdom
- Department of Transplantation, Sheffield Teaching Hospitals, Sheffield S57AU, United Kingdom
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19
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Nimitpanya P, Limpanavongsaen P, Udomkarnjananun S, Jutivorakool K, Vanichanan J. Post-transplant Lymphoproliferative Disorder of Naso-orbital Region in Adult Renal Transplant Recipients: A Case Report and Literature Review. Transplant Proc 2020; 52:2731-2735. [PMID: 32089317 DOI: 10.1016/j.transproceed.2020.01.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 01/22/2020] [Indexed: 10/25/2022]
Abstract
Post-transplant lymphoproliferative disorder (PTLD) is an uncommon but fatal complication following both solid organ and hematologic stem cell transplantations. Epstein-Barr virus (EBV) has been considered a main etiologic agent causing PTLD, especially in the first year after transplantation. Extranodal manifestations are frequently found in PTLD; however, naso-orbital involvement in adults is rare. We report a case of EBV-associated PTLD of the naso-orbital region in a 72-year-old patient that occurred 10 years after kidney transplant. Six additional adults with naso-orbital PTLD were identified after completing this literature review, including 2 cases with eyelid swelling, 3 cases with proptosis, and 1 case with facial numbness. The majority of cases occurred after 1 year of transplantation and were associated with EBV. This report emphasizes recognizing PTLD as differential diagnosis in transplant recipients who present with naso-orbital symptoms.
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Affiliation(s)
| | | | - Suwasin Udomkarnjananun
- Division of Nephrology, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Kamonwan Jutivorakool
- Division of Infectious Diseases, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Jakapat Vanichanan
- Division of Infectious Diseases, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.
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20
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Chen HS, Ho MC, Hu RH, Wu JF, Chen HL, Ni YH, Hsu HY, Jeng YM, Chang MH. Roles of Epstein–Barr virus viral load monitoring in the prediction of posttransplant lymphoproliferative disorder in pediatric liver transplantation. J Formos Med Assoc 2019; 118:1362-1368. [DOI: 10.1016/j.jfma.2018.12.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 08/26/2018] [Accepted: 12/12/2018] [Indexed: 11/26/2022] Open
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21
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Allen UD, Preiksaitis JK. Post-transplant lymphoproliferative disorders, Epstein-Barr virus infection, and disease in solid organ transplantation: Guidelines from the American Society of Transplantation Infectious Diseases Community of Practice. Clin Transplant 2019; 33:e13652. [PMID: 31230381 DOI: 10.1111/ctr.13652] [Citation(s) in RCA: 165] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 06/19/2019] [Indexed: 02/06/2023]
Abstract
PTLD with the response-dependent sequential use of RIS, rituximab, and cytotoxic chemotherapy is recommended. Evidence gaps requiring future research and alternate treatment strategies including immunotherapy are highlighted.
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Affiliation(s)
- Upton D Allen
- Division of Infectious Diseases, Department of Pediatrics, Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.,Research Institute, Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.,Institute of Health Policy, Management & Evaluation, University of Toronto, Toronto, ON, Canada
| | - Jutta K Preiksaitis
- Division of Infectious Diseases, Department of Medicine, University of Alberta, Edmonton, AB, Canada
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22
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Govind S, Hockley J, Morris C, Almond N. The development and establishment of the 1st WHO BKV International Standard for nucleic acid based techniques. Biologicals 2019; 60:75-84. [DOI: 10.1016/j.biologicals.2019.04.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 04/15/2019] [Accepted: 04/25/2019] [Indexed: 12/25/2022] Open
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23
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Bontems S, Boreux R, Capraro V, Huynen P, Descy J, Melin P, Hayette MP, Meex C. Evaluation of the Abbott RealTime quantitative CMV and EBV assays using the maxCycle protocol in a laboratory automation context. J Virol Methods 2019; 270:137-145. [PMID: 31121188 DOI: 10.1016/j.jviromet.2019.05.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 05/14/2019] [Accepted: 05/17/2019] [Indexed: 01/08/2023]
Abstract
Real-time PCR are often used for the diagnosis and monitoring of Cytomegalovirus (CMV) and Epstein-Barr virus (EBV) infections in susceptible populations. In this context, we evaluated the analytical performances of the Abbott RealTime CMV/EBV maxCycle protocol automated on the m2000 platform (Abbott). It was compared to our routinely-used procedure consisting of a NucleoMag® DNA extraction automated on a STARlet platform followed by manually processed CMV and EBV quantitative real-time PCR (Diagenode). In this study, we showed that both EBV assays exhibited a similar sensitivity but with a better precision for the EBV Abbott RealTime assay. For the CMV performances, the Abbott assay was more sensitive and more precise than our routine method. The use of WHO International Standards also indicated a slight underestimation of the viral loads (-0.25 log10 IU/mL and -0.21 log10 IU/mL for CMV and EBV assays respectively) while these were rather overestimated with the Starlet/Diagenode method (0.48 log10 IU/mL and 0.19 log10 IU/mL for CMV and EBV assays respectively). These trends were confirmed using relevant whole-blood clinical samples and external quality controls. The workflows were also compared and we highlighted a significant technician hands-on time reduction (-63%) using the Abbott CMV/EBV maxCycle automated protocol.
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Affiliation(s)
- Sébastien Bontems
- Laboratory of Clinical Microbiology, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
| | - Raphaël Boreux
- Laboratory of Clinical Microbiology, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
| | - Valérie Capraro
- Molecular Biology Platform, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
| | - Pascale Huynen
- Laboratory of Clinical Microbiology, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
| | - Julie Descy
- Laboratory of Clinical Microbiology, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
| | - Pierrette Melin
- Laboratory of Clinical Microbiology, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
| | - Marie-Pierre Hayette
- Laboratory of Clinical Microbiology, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
| | - Cécile Meex
- Laboratory of Clinical Microbiology, Unilab-Lg, CHU of Liege, 1 avenue de l'hopital, 4000 Liege, Belgium.
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Baron A, Gicquel A, Plantier JC, Gueudin M. Evaluation of four commercial extraction-quantification systems to monitor EBV or CMV viral load in whole blood. J Clin Virol 2019; 113:39-44. [PMID: 30870646 DOI: 10.1016/j.jcv.2019.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/24/2018] [Accepted: 03/01/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND Measurement of cytomegalovirus (CMV) and Epstein-Barr virus (EBV) viral loads is commonly used to monitor posttransplant patients. Two new systems (eMAG/eSTREAM and Versant/kPCR) have been recently commercialized. OBJECTIVES To evaluate the performance of four systems to quantify CMV and EBV in whole blood. STUDY DESIGN Three extraction and real-time PCR amplification systems: m2000SP/RT (M2000), eMAG/eSTREAM (EMAG), and Versant/kPCR (KPCR) were compared with our routine system Qiasymphony/RGQ (QS/RGQ). The 4 systems were tested using 3 dilutions in triplicate according to the WHO international standard (WHO-IS) for intra-assay reproducibility; 56 whole blood samples (24 patients, 4 follow-ups) for CMV and 45 samples (27 patients, 3 follow-ups) for EBV. RESULTS For CMV, the mean of the WHO-IS (expected value: 4.7 Log IU/ml) was: QS/RGQ=4.84, M2000=4.61, EMAG=4.33, and KPCR=4.79. One patient (10 samples) presented a major underquantification by QS/RGQ. Of the 46 remaining samples, 41 were quantified with QS/RGQ, 43 with M2000, 33 with EMAG and 24 with KPCR. For EBV, the mean of the WHO-IS was: QS/RGQ=4.70, M2000=4.61, EMAG=4.62, and KPCR=4.57. Among the 45 samples, 43 were quantified with QS/RGQ, 39 with M2000, 40 with EMAG and 32 with KPCR. CONCLUSION The results obtained with the WHO-IS were very good. The results of patients' samples were well correlated with the announced sensitivity of each system. The elevated threshold of the KPCR CMV assay may be problematic for the follow-up of highly immunocompromised patients who require early introduction of treatment.
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Affiliation(s)
- Adeline Baron
- CHU de Rouen, Laboratoire de Virologie, F-76000 Rouen, France
| | - Albane Gicquel
- CHU de Rouen, Laboratoire de Virologie, F-76000 Rouen, France
| | | | - Marie Gueudin
- CHU de Rouen, Laboratoire de Virologie, F-76000 Rouen, France
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Fishman JA, Costa SF, Alexander BD. Infection in Kidney Transplant Recipients. KIDNEY TRANSPLANTATION - PRINCIPLES AND PRACTICE 2019. [PMCID: PMC7152057 DOI: 10.1016/b978-0-323-53186-3.00031-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
In organ transplant recipients, impaired inflammatory responses suppress the clinical and radiologic findings of infection. The possible etiologies of infection are diverse, ranging from common bacterial and viral pathogens that affect the entire community to opportunistic pathogens that cause invasive disease only in immunocompromised hosts. Antimicrobial therapies required to treat established infection are often complex, with accompanying risks for drug toxicities and drug interactions with the immunosuppressive agents used to maintain graft function. Rapid and specific diagnosis is essential for successful therapy. The risk of serious infections in the organ transplant patient is largely determined by the interaction between two factors: the patient’s epidemiologic exposures and the patient’s net state of immunosuppression. The epidemiology of infection includes environmental exposures and nosocomial infections, organisms derived from donor tissues, and latent infections from the recipient activated with immunosuppression. The net state of immune suppression is a conceptual framework that measures those factors contributing to risk for infection: the dose, duration, and temporal sequence of immunosuppressive drugs; the presence of foreign bodies or injuries to mucocutaneous barriers; neutropenia; metabolic abnormalities including diabetes; devitalized tissues, hematomas, or effusions postsurgery; and infection with immunomodulating viruses. Multiple factors are present in each host. A timeline exists to aid in the development of a differential diagnosis for infection. The timeline for each patient is altered by changes in prophylaxis and immunosuppressive drugs. For common infections, new microbiologic assays, often nucleic acid based, are useful in the diagnosis and management of opportunistic infections.
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26
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Engelmann I, Alidjinou EK, Lazrek M, Pouillaude JM, Ogiez J, Rose F, Duhamel A, Dewilde A, Hober D. Comparison of two commercial quantitative PCR assays for EBV DNA detection and their correlation with the first WHO International Standard for EBV. J Med Microbiol 2018; 67:529-536. [DOI: 10.1099/jmm.0.000702] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Affiliation(s)
- Ilka Engelmann
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Enagnon Kazali Alidjinou
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Mouna Lazrek
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Jean-Marie Pouillaude
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Judith Ogiez
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - François Rose
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Alain Duhamel
- Université de Lille, CHU Lille, EA 2694 - Santé publique : épidémiologie et qualité des soins, F-59000 Lille, France
| | - Anny Dewilde
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Didier Hober
- Université de Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
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27
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Affiliation(s)
- Daan Dierickx
- From the Department of Hematology, University Hospitals Leuven, and the Laboratory for Experimental Hematology, Department of Oncology, University of Leuven, Leuven, Belgium (D.D.); and the Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN (T.M.H.)
| | - Thomas M Habermann
- From the Department of Hematology, University Hospitals Leuven, and the Laboratory for Experimental Hematology, Department of Oncology, University of Leuven, Leuven, Belgium (D.D.); and the Division of Hematology, Department of Medicine, Mayo Clinic, Rochester, MN (T.M.H.)
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28
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Engelmann I, Alidjinou EK, Lazrek M, Ogiez J, Pouillaude JM, Chazard E, Dewilde A, Hober D. Comparison of two commercial quantitative PCR assays and correlation with the first WHO International Standard for human CMV. Diagn Microbiol Infect Dis 2018; 91:27-33. [PMID: 29463426 DOI: 10.1016/j.diagmicrobio.2017.12.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 12/26/2017] [Accepted: 12/28/2017] [Indexed: 02/08/2023]
Abstract
Comparability between CMV assays could be facilitated by the first WHO International Standard for human CMV (standard). Standard dilutions were submitted to nucleic acid extraction with Versant kPCR Molecular systems SP or MagNA Pure LC System followed by the kPCR PLX™ CMV DNA (kPCR) or the CMV R-gene™ assay (R-gene), respectively; 139 clinical specimens were tested. Both assays correlated well with the standard (R2 > 0.96) and a matrix effect was observed. Quantitative results correlated reasonably between both assays for whole blood (R2 = 0.79) and well for other specimen types (R2 = 0.93). Quantification differences were within one log10 of the averaged log10 results for 25/27 blood specimens and for 32/33 other specimens. Calibration to the standard did not increase this percentage. In conclusion, results of both assays showed reasonable correlation with each other and good correlation with the standard. Calibration to the standard did not improve comparability of quantitative results.
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Affiliation(s)
- Ilka Engelmann
- Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France.
| | - Enagnon Kazali Alidjinou
- Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Mouna Lazrek
- Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Judith Ogiez
- Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Jean-Marie Pouillaude
- Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Emmanuel Chazard
- Univ. Lille, EA 2694, CHU Lille, Public health Department, F-59000 Lille, France
| | - Anny Dewilde
- Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
| | - Didier Hober
- Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France
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29
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Solano C, Mateo EM, Pérez A, Talaya A, Terol MJ, Albert E, Giménez E, Vinuesa V, Piñana JL, Boluda JCH, Navarro D. Epstein-Barr virus DNA load kinetics analysis in allogeneic hematopoietic stem cell transplant recipients: Is it of any clinical usefulness? J Clin Virol 2017; 97:26-32. [DOI: 10.1016/j.jcv.2017.10.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 10/24/2017] [Indexed: 12/12/2022]
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30
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[How to manage EBV reactivation and EBV-PTLD, CMV and human herpesvirus 6 reactivation and infection after allogeneic stem cell transplantation: A report of the SFGM-TC (update)]. Bull Cancer 2017; 104:S181-S187. [PMID: 29169653 DOI: 10.1016/j.bulcan.2017.10.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 10/26/2017] [Accepted: 10/26/2017] [Indexed: 11/22/2022]
Abstract
The French society of bone marrow transplantation and cell therapy (SFGM-TC) organizes annually workshops in the attempt to harmonize clinical practices between different francophone transplantation center. Here, we report our recommendations regarding the management of Epstein Barr virus reactivation and lymphoproliferative disorders, cytomegalovirus (CMV) and human herpes virus 6 (HHV6) after allogeneic stem cell transplantation.
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31
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Sanosyan A, Fayd’herbe de Maudave A, Bollore K, Zimmermann V, Foulongne V, Van de Perre P, Tuaillon E. The impact of targeting repetitive BamHI-W sequences on the sensitivity and precision of EBV DNA quantification. PLoS One 2017; 12:e0183856. [PMID: 28850597 PMCID: PMC5574619 DOI: 10.1371/journal.pone.0183856] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 08/11/2017] [Indexed: 12/14/2022] Open
Abstract
Background Viral load monitoring and early Epstein-Barr virus (EBV) DNA detection are essential in routine laboratory testing, especially in preemptive management of Post-transplant Lymphoproliferative Disorder. Targeting the repetitive BamHI-W sequence was shown to increase the sensitivity of EBV DNA quantification, but the variability of BamHI-W reiterations was suggested to be a source of quantification bias. We aimed to assess the extent of variability associated with BamHI-W PCR and its impact on the sensitivity of EBV DNA quantification using the 1st WHO international standard, EBV strains and clinical samples. Methods Repetitive BamHI-W- and LMP2 single- sequences were amplified by in-house qPCRs and BXLF-1 sequence by a commercial assay (EBV R-gene™, BioMerieux). Linearity and limits of detection of in-house methods were assessed. The impact of repeated versus single target sequences on EBV DNA quantification precision was tested on B95.8 and Raji cell lines, possessing 11 and 7 copies of the BamHI-W sequence, respectively, and on clinical samples. Results BamHI-W qPCR demonstrated a lower limit of detection compared to LMP2 qPCR (2.33 log10 versus 3.08 log10 IU/mL; P = 0.0002). BamHI-W qPCR underestimated the EBV DNA load on Raji strain which contained fewer BamHI-W copies than the WHO standard derived from the B95.8 EBV strain (mean bias: - 0.21 log10; 95% CI, -0.54 to 0.12). Comparison of BamHI-W qPCR versus LMP2 and BXLF-1 qPCR showed an acceptable variability between EBV DNA levels in clinical samples with the mean bias being within 0.5 log10 IU/mL EBV DNA, whereas a better quantitative concordance was observed between LMP2 and BXLF-1 assays. Conclusions Targeting BamHI-W resulted to a higher sensitivity compared to LMP2 but the variable reiterations of BamHI-W segment are associated with higher quantification variability. BamHI-W can be considered for clinical and therapeutic monitoring to detect an early EBV DNA and a dynamic change in viral load.
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Affiliation(s)
- Armen Sanosyan
- CHU Montpellier, Montpellier, France
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université de Montpellier, Montpellier, France
- * E-mail:
| | | | - Karine Bollore
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université de Montpellier, Montpellier, France
| | - Valérie Zimmermann
- Institut de Génétique Moléculaire de Montpellier, Centre National de la Recherche Scientifiquem, UMR 5535, Université de Montpellier, Montpellier, France
| | - Vincent Foulongne
- CHU Montpellier, Montpellier, France
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université de Montpellier, Montpellier, France
| | - Philippe Van de Perre
- CHU Montpellier, Montpellier, France
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université de Montpellier, Montpellier, France
| | - Edouard Tuaillon
- CHU Montpellier, Montpellier, France
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université de Montpellier, Montpellier, France
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32
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Kim H, Hur M, Kim JY, Moon HW, Yun YM, Cho HC. Automated Nucleic Acid Extraction Systems for Detecting Cytomegalovirus and Epstein-Barr Virus Using Real-Time PCR: A Comparison Study Between the QIAsymphony RGQ and QIAcube Systems. Ann Lab Med 2017; 37:129-136. [PMID: 28028999 PMCID: PMC5203990 DOI: 10.3343/alm.2017.37.2.129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 10/21/2016] [Accepted: 11/17/2016] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Cytomegalovirus (CMV) and Epstein-Barr virus (EBV) are increasingly important in immunocompromised patients. Nucleic acid extraction methods could affect the results of viral nucleic acid amplification tests. We compared two automated nucleic acid extraction systems for detecting CMV and EBV using real-time PCR assays. METHODS One hundred and fifty-three whole blood (WB) samples were tested for CMV detection, and 117 WB samples were tested for EBV detection. Viral nucleic acid was extracted in parallel by using QIAsymphony RGQ and QIAcube (Qiagen GmbH, Germany), and real-time PCR assays for CMV and EBV were performed with a Rotor-Gene Q real-time PCR cycler (Qiagen). Detection rates for CMV and EBV were compared, and agreements between the two systems were analyzed. RESULTS The detection rate of CMV and EBV differed significantly between the QIAsymphony RGQ and QIAcube systems (CMV, 59.5% [91/153] vs 43.8% [67/153], P=0.0005; EBV, 59.0% [69/117] vs 42.7% [50/117], P=0.0008). The two systems showed moderate agreement for CMV and EBV detection (kappa=0.43 and 0.52, respectively). QIAsymphony RGQ showed a negligible correlation with QIAcube for quantitative EBV detection. QIAcube exhibited EBV PCR inhibition in 23.9% (28/117) of samples. CONCLUSIONS Automated nucleic acid extraction systems have different performances and significantly affect the detection of viral pathogens. The QIAsymphony RGQ system appears to be superior to the QIAcube system for detecting CMV and EBV. A suitable sample preparation system should be considered for optimized nucleic acid amplification in clinical laboratories.
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Affiliation(s)
- Hanah Kim
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Mina Hur
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, Korea.
| | - Ji Young Kim
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Hee Won Moon
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Yeo Min Yun
- Department of Laboratory Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Hyun Chan Cho
- Department of Laboratory Medicine, Hallym University College of Medicine, Seoul, Korea
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33
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Huh HJ, Park JE, Kim JY, Yun SA, Lee MK, Lee NY, Kim JW, Ki CS. Performance of the Real-Q EBV Quantification Kit for Epstein-Barr Virus DNA Quantification in Whole Blood. Ann Lab Med 2017; 37:147-150. [PMID: 28029001 PMCID: PMC5203992 DOI: 10.3343/alm.2017.37.2.147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 09/18/2016] [Accepted: 12/05/2016] [Indexed: 12/25/2022] Open
Abstract
There has been increasing interest in standardized and quantitative Epstein-Barr virus (EBV) DNA testing for the management of EBV disease. We evaluated the performance of the Real-Q EBV Quantification Kit (BioSewoom, Korea) in whole blood (WB). Nucleic acid extraction and real-time PCR were performed by using the MagNA Pure 96 (Roche Diagnostics, Germany) and 7500 Fast real-time PCR system (Applied Biosystems, USA), respectively. Assay sensitivity, linearity, and conversion factor were determined by using the World Health Organization international standard diluted in EBV-negative WB. We used 81 WB clinical specimens to compare performance of the Real-Q EBV Quantification Kit and artus EBV RG PCR Kit (Qiagen, Germany). The limit of detection (LOD) and limit of quantification (LOQ) for the Real-Q kit were 453 and 750 IU/mL, respectively. The conversion factor from EBV genomic copies to IU was 0.62. The linear range of the assay was from 750 to 10⁶ IU/mL. Viral load values measured with the Real-Q assay were on average 0.54 log₁₀ copies/mL higher than those measured with the artus assay. The Real-Q assay offered good analytical performance for EBV DNA quantification in WB.
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Affiliation(s)
- Hee Jae Huh
- Department of Laboratory Medicine and Genetics, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Jong Eun Park
- Department of Laboratory Medicine and Genetics, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Ji Youn Kim
- Center for Clinical Medicine, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Sun Ae Yun
- Center for Clinical Medicine, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Myoung Keun Lee
- Department of Laboratory Medicine and Genetics, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Nam Yong Lee
- Department of Laboratory Medicine and Genetics, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Jong Won Kim
- Department of Laboratory Medicine and Genetics, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea
| | - Chang Seok Ki
- Department of Laboratory Medicine and Genetics, Samsung Biomedical Research Institute, Samsung Medical Center, Seoul, Korea.
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Calibration of BK Virus Nucleic Acid Amplification Testing to the 1st WHO International Standard for BK Virus. J Clin Microbiol 2017; 55:923-930. [PMID: 28053213 DOI: 10.1128/jcm.02315-16] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2016] [Accepted: 12/27/2016] [Indexed: 12/30/2022] Open
Abstract
Significant interassay variability in the quantification of BK virus (BKV) DNA precludes establishing broadly applicable thresholds for the management of BKV infection in transplantation. The 1st WHO International Standard for BKV (primary standard) was introduced in 2016 as a common calibrator for improving the harmonization of BKV nucleic acid amplification testing (NAAT) and enabling comparisons of biological measurements worldwide. Here, we evaluated the Altona RealStar BKV assay (Altona) and calibrated the results to the international unit (IU) using the Exact Diagnostics BKV verification panel, a secondary standard traceable to the primary standard. The primary and secondary standards on Altona had nearly identical linear regression equations (primary standard, Y = 1.05X - 0.28, R2 = 0.99; secondary standard, Y = 1.04X - 0.26, R2 = 0.99) and conversion factors (primary standard, 1.11 IU/copy; secondary standard, 1.09 IU/copy). A comparison of Altona with a laboratory-developed BKV NAAT assay in IU/ml versus copies/ml using Passing-Bablok regression revealed similar regression lines, no proportional bias, and improvement in the systematic bias (95% confidence interval of intercepts: copies/ml, -0.52 to -1.01; IU/ml, 0.07 to -0.36). Additionally, Bland-Altman analyses revealed a clinically significant reduction of bias when results were reported in IU/ml (IU/ml, -0.10 log10; copies/ml, -0.70 log10). These results indicate that the use of a common calibrator improved the agreement between the two assays. As clinical laboratories worldwide use calibrators traceable to the primary standard to harmonize BKV NAAT results, we anticipate improved interassay comparisons with a potential for establishing broadly applicable quantitative BKV DNA load cutoffs for clinical practice.
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