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Mikulska M, Bartalucci C, Raiola AM, Oltolini C. Does PTCY increase the risk of infections? Blood Rev 2023; 62:101092. [PMID: 37120352 DOI: 10.1016/j.blre.2023.101092] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/10/2023] [Accepted: 04/18/2023] [Indexed: 05/01/2023]
Abstract
PTCY has been mainly used in haploidentical transplant (haploHSCT), but its use in matched donors allowed better evaluation of infectious risk conferred separately by PTCY or donor type. PTCY increased the risk of bacterial infections, both in haploidentical and matched donors, mainly pre-engraftment bacteremias. Bacterial infections, particularly due to multidrug-resistant Gram-negatives, were main causes of infection-related deaths. Higher rates of CMV and other viral infections were reported, mainly in haploHSCT. The role of donor might be more important than the role of PTCY. PTCY increased the risk of BK virus associated hemorrhagic cystitis, and seemed associated with higher risk of respiratory viral infections. Fungal infections were frequent in haploHSCT PCTY cohorts without mold active prophylaxis, but the exact role of PTCY needs to be established. Infections appear to be increased in patients receiving PTCY, although the exact role of GvHD prophylaxis and donor type can only be assessed in prospective trials.
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Affiliation(s)
- Malgorzata Mikulska
- Division of Infectious Diseases, Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
| | - Claudia Bartalucci
- Division of Infectious Diseases, Department of Health Sciences (DISSAL), University of Genoa, Genoa, Italy; IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Anna Maria Raiola
- Ematologia e Terapie Cellulari, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Chiara Oltolini
- Clinic of Infectious Diseases, Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy
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Li X, Yang J, Cai Y, Huang C, Xu X, Qiu H, Niu J, Zhou K, Zhang Y, Xia X, Wei Y, Shen C, Tong Y, Dong B, Wan L, Song X. Low-dose anti-thymocyte globulin plus low-dose post-transplant cyclophosphamide-based regimen for prevention of graft-versus-host disease after haploidentical peripheral blood stem cell transplants: a large sample, long-term follow-up retrospective study. Front Immunol 2023; 14:1252879. [PMID: 37954615 PMCID: PMC10639171 DOI: 10.3389/fimmu.2023.1252879] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 10/12/2023] [Indexed: 11/14/2023] Open
Abstract
Introduction The novel low-dose anti-thymocyte (ATG, 5 mg/kg) plus low-dose post-transplant cyclophosphamide (PTCy, 50 mg/kg) (low-dose ATG/PTCy)-based regimen had promising activity for prevention of graft-versus-host disease (GVHD) in haploidentical-peripheral blood stem cell transplantation (haplo-PBSCT), but its impacts on long-term outcomes remain to be defined. Methods We performed a large sample, long-term follow-up retrospective study to evaluate its efficacy for GVHD prophylaxis. Results The study enrolled 260 patients, including 162 with myeloid malignancies and 98 with lymphoid malignancies. The median follow-up time was 27.0 months. For the entire cohort, the cumulative incidences (CIs) of grade II-IV and III-IV acute GVHD (aGVHD) by 180 days were 13.46% (95% CI, 9.64%-17.92%) and 5.77% (95% CI, 3.37%-9.07%); while total and moderate/severe chronic GVHD (cGVHD) by 2 years were 30.97% (95% CI, 25.43%-36.66%) and 18.08% (95% CI, 13.68%-22.98%), respectively. The 2-year overall survival (OS), relapse-free survival (RFS), GVHD-free, relapse-free survival (GRFS), non-relapse mortality (NRM), and CIs of relapse were 60.7% (95% CI, 54.8%-67.10%), 58.1% (95% CI, 52.2%-64.5%), 50.6% (95% CI, 44.8-57.1%), 23.04% (95% CI, 18.06%-28.40%), and 18.09% (95% CI, 14.33%-23.97%, respectively. The 1-year CIs of cytomegalovirus (CMV) and Epstein-Barr virus (EBV) reactivation were 43.46% (95% CI, 37.39%-49.37%) and 18.08% (95% CI, 13.68%-22.98%), respectively. In multivariate analysis, the disease status at transplantation was associated with inferior survivor outcomes for all patients and myeloid and lymphoid malignancies, while cGVHD had superior outcomes for all patients and myeloid malignancies, but not for lymphoid malignancies. Discussion The results demonstrated that the novel regimen could effectively prevent the occurrence of aGVHD in haplo-PBSCT.
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Affiliation(s)
- Xingying Li
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Jun Yang
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Yu Cai
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Chongmei Huang
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Xiaowei Xu
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Huiying Qiu
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Jiahua Niu
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Kun Zhou
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Ying Zhang
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Xinxin Xia
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Yu Wei
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Chang Shen
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Yin Tong
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Baoxia Dong
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Liping Wan
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
| | - Xianmin Song
- Department of Hematology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
- Engineering Technology Research Center of Cell Therapy and Clinical Translation, Shanghai Science and Technology Committee (STCSM), Shanghai, China
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Orofino G, Xue E, Doglio M, Noviello M, Tassi E, Cristante M, Acerbis A, Clerici D, Farina F, Campodonico E, Bruno A, Piemontese S, Mastaglio S, Diral E, Milani R, Ruggeri A, Corti C, Vago L, Bonini C, Peccatori J, Ciceri F, Lupo Stanghellini MT, Greco R. Dynamics of polyclonal immuno-reconstitution after allogeneic transplant with post-transplant cyclophosphamide and letermovir. Bone Marrow Transplant 2023; 58:1104-1111. [PMID: 37468541 DOI: 10.1038/s41409-023-02046-9] [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: 04/04/2023] [Revised: 06/28/2023] [Accepted: 07/13/2023] [Indexed: 07/21/2023]
Abstract
Cytomegalovirus (CMV) reactivations are strong stimulators of immune-reconstitution (IR) in hematopoietic stem cell transplantation (HSCT) recipients. Herein, we analyzed 317 CMV-seropositive consecutive patients (n = 109 letermovir, LTV; n = 208 no-LTV), undergoing HSCT with post-transplant cyclophosphamide (PTCy) and calcineurin inhibitor- (CNI) free graft-versus-host-disease (GvHD) prophylaxis. At day+90, median CD19+/mm3 was higher in LTV-cohort: 5.5 [0;439] versus 2 [0;294], p = 0.008; median CD3+/mm3 counts were lower in LTV-cohort, with no differences in CD4+, CD8+ and NK-cells. At day+180 median CD3+, CD4+ and CD8+/mm3 values were comparable between groups. Higher CD19+/mm3 counts were observed in LTV-cohort: 62 [0; 2983] versus 42 [0; 863]. Significantly higher median NK/mm3 values were seen in LTV-cohort: 225.5 [0;763] versus 163.5 [0;1181], p = 0.0003. The impact of LTV on B-cell IR at 3 months and NK-cell levels at 6 months was retained in multivariate analysis (p < 0.01), whereas the effect on T-cells was not confirmed. Moreover, we confirmed a significant reduction of clinically-relevant CMV, and moderate-to- severe chronic GvHD in LTV-cohort. Overall, in our study the use of LTV was associated with a slight improvement of B-cell and NK-cells reconstitution, with only minor impact on T-cell subsets, giving new insights on polyclonal IR for HSCT recipients in the LTV era.
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Affiliation(s)
- Giorgio Orofino
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Università Vita-Salute San Raffaele, Milano, Italy
| | - Elisabetta Xue
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Matteo Doglio
- Experimental Hematology Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Maddalena Noviello
- Experimental Hematology Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Cell Therapy Immunomonitoring Laboratory (MITiCi), Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Hospital, Milano, Italy
| | - Elena Tassi
- Experimental Hematology Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Cell Therapy Immunomonitoring Laboratory (MITiCi), Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Hospital, Milano, Italy
| | | | - Andrea Acerbis
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Università Vita-Salute San Raffaele, Milano, Italy
| | - Daniela Clerici
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Francesca Farina
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Edoardo Campodonico
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Università Vita-Salute San Raffaele, Milano, Italy
| | - Alessandro Bruno
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Università Vita-Salute San Raffaele, Milano, Italy
| | - Simona Piemontese
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Sara Mastaglio
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Elisa Diral
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Raffaella Milani
- Immunohematology and Transfusion Medicine Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Annalisa Ruggeri
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Consuelo Corti
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Luca Vago
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Università Vita-Salute San Raffaele, Milano, Italy
- Unit of Immunogenetics, Leukemia Genomics and Immunobiology IRCCS San Raffaele Hospital, Milano, Italy
| | - Chiara Bonini
- Università Vita-Salute San Raffaele, Milano, Italy
- Experimental Hematology Unit, IRCCS San Raffaele Hospital, Milano, Italy
- Cell Therapy Immunomonitoring Laboratory (MITiCi), Division of Immunology, Transplantation and Infectious Diseases, IRCCS San Raffaele Hospital, Milano, Italy
| | - Jacopo Peccatori
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy
| | - Fabio Ciceri
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy.
- Università Vita-Salute San Raffaele, Milano, Italy.
| | | | - Raffaella Greco
- Haematology and Bone Marrow Transplant Unit, IRCCS San Raffaele Hospital, Milano, Italy.
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Lauruschkat CD, Muchsin I, Rein A, Erhard F, Grathwohl D, Dölken L, Köchel C, Falk CS, Einsele H, Wurster S, Grigoleit GU, Kraus S. CD4+ T cells are the major predictor of HCMV control in allogeneic stem cell transplant recipients on letermovir prophylaxis. Front Immunol 2023; 14:1148841. [PMID: 37234158 PMCID: PMC10206124 DOI: 10.3389/fimmu.2023.1148841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/20/2023] [Indexed: 05/27/2023] Open
Abstract
Introduction Human cytomegalovirus (HCMV) causes significant morbidity and mortality in allogeneic stem cell transplant (alloSCT) recipients. Recently, antiviral letermovir prophylaxis during the first 100 days after alloSCT replaced PCR-guided preemptive therapy as the primary standard of care for HCMV reactivations. Here, we compared NK-cell and T-cell reconstitution in alloSCT recipients receiving preemptive therapy or letermovir prophylaxis in order to identify potential biomarkers predicting prolonged and symptomatic HCMV reactivation. Methods To that end, the NK-cell and T-cell repertoire of alloSCT recipients managed with preemptive therapy (n=32) or letermovir prophylaxis (n=24) was characterized by flow cytometry on days +30, +60, +90 and +120 after alloSCT. Additionally, background-corrected HCMV-specific T-helper (CD4+IFNγ+) and cytotoxic (CD8+IFNγ+CD107a+) T cells were quantified after pp65 stimulation. Results Compared to preemptive therapy, letermovir prophylaxis prevented HCMV reactivation and decreased HCMV peak viral loads until days +120 and +365. Letermovir prophylaxis resulted in decreased T-cell numbers but increased NK-cell numbers. Interestingly, despite the inhibition of HCMV, we found high numbers of "memory-like" (CD56dimFcεRIγ- and/or CD159c+) NK cells and an expansion of HCMV-specific CD4+ and CD8+ T cells in letermovir recipients. We further compared immunological readouts in patients on letermovir prophylaxis with non/short-term HCMV reactivation (NSTR) and prolonged/symptomatic HCMV reactivation (long-term HCMV reactivation, LTR). Median HCMV-specific CD4+ T-cell frequencies were significantly higher in NSTR patients (day +60, 0.35 % vs. 0.00 % CD4+IFNγ+/CD4+ cells, p=0.018) than in patients with LTR, whereas patients with LTR had significantly higher median regulatory T-cell (Treg) frequencies (day +90, 2.2 % vs. 6.2 % CD4+CD25+CD127dim/CD4+ cells, p=0.019). ROC analysis confirmed low HCMV specific CD4+ (AUC on day +60: 0.813, p=0.019) and high Treg frequencies (AUC on day +90: 0.847, p=0.021) as significant predictors of prolonged and symptomatic HCMV reactivation. Discussion Taken together, letermovir prophylaxis delays HCMV reactivation and alters NK- and T-cell reconstitution. High numbers of HCMV-specific CD4+ T cells and low numbers of Tregs seem to be pivotal to suppress post-alloSCT HCMV reactivation during letermovir prophylaxis. Administration of more advanced immunoassays that include Treg signature cytokines might contribute to the identification of patients at high-risk for long-term and symptomatic HCMV reactivation who might benefit from prolonged administration of letermovir.
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Affiliation(s)
| | - Ihsan Muchsin
- Institute for Virology and Immunobiology, Julius-Maximilians-University Wuerzburg, Wuerzburg, Germany
| | - Alice Rein
- Department of Internal Medicine II, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Florian Erhard
- Institute for Virology and Immunobiology, Julius-Maximilians-University Wuerzburg, Wuerzburg, Germany
| | - Denise Grathwohl
- Department of Internal Medicine II, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Lars Dölken
- Institute for Virology and Immunobiology, Julius-Maximilians-University Wuerzburg, Wuerzburg, Germany
- Helmholtz-Institute for RNA-based Infection Research (HIRI), Helmholtz-Center for Infection Research (HZI), Wuerzburg, Germany
| | - Carolin Köchel
- Department of Internal Medicine II, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Christine Susanne Falk
- Hannover Medical School, Institute of Transplant Immunology, Hanover, Germany
- TTU-IICH, German Center for Infection Research (DZIF), Hannover-Braunschweig, Germany
- BREATH Site, German Center for Lung Research (DZL), Hannover-Braunschweig, Germany
| | - Hermann Einsele
- Department of Internal Medicine II, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Sebastian Wurster
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Götz Ulrich Grigoleit
- Department of Internal Medicine II, University Hospital of Wuerzburg, Wuerzburg, Germany
- Department of Hematology, Oncology and Immunology, Helios Hospital Duisburg, Duisburg, Germany
| | - Sabrina Kraus
- Department of Internal Medicine II, University Hospital of Wuerzburg, Wuerzburg, Germany
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Sun YQ, Ma R, Huang XJ. Optimizing the treatment of cytomegalovirus infection in allo-HSCT recipients. Expert Rev Clin Immunol 2023; 19:227-235. [PMID: 36541485 DOI: 10.1080/1744666x.2023.2161510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
INTRODUCTION Cytomegalovirus (CMV) infection continues to negatively impact the prognosis after allogeneic hematopoietic stem cell transplantation (allo-HSCT), even with active monitoring and preemptive strategies. Recent progress in pharmacology, immunotherapy, and vaccines has improved the strategy of CMV management. AREAS COVERED We summarized recent advances in managing CMV infection post allo-HSCT, including diagnosis, prophylaxis, and treatment. In this review, we mainly focused on approaches that have optimized or might optimize the management of CMV infection after allo-HSCT. EXPERT OPINION In our opinion, optimized management covers aspects including the serial monitoring of CMV-DNA and CMI, an accurate diagnosis, effective prophylaxis, and a rational preemptive therapy integrating antiviral drugs and cell therapies. Strategies based on the understanding of CMV pathogenesis and CMV-related immune reconstitution after allo-HSCT will be a direction in future studies.
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Affiliation(s)
- Yu-Qian Sun
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Rui Ma
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
| | - Xiao-Jun Huang
- Peking University People's Hospital, Peking University Institute of Hematology, National Clinical Research Center for Hematologic Disease, Beijing Key Laboratory of Hematopoietic Stem Cell Transplantation, Beijing, China
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Kuhn A, Puttkammer J, Madigan T, Dinnes L, Khan S, Ferdjallah A, Kohorst M. Letermovir as Cytomegalovirus Prophylaxis in a Pediatric Cohort: A Retrospective Analysis. Transplant Cell Ther 2023; 29:62.e1-62.e4. [PMID: 36244677 DOI: 10.1016/j.jtct.2022.10.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/20/2022] [Accepted: 10/06/2022] [Indexed: 11/09/2022]
Abstract
Letermovir is an attractive cytomegalovirus (CMV) prophylactic agent, but published data in children are scarce. This retrospective chart review aimed to describe our experience using letermovir as CMV prophylaxis in pediatric hematopoietic cell transplantation (HCT) recipients. Pediatric patients (age <20 years) undergoing allogeneic HCT and receiving letermovir prophylaxis in the Mayo Clinic Pediatric Bone Marrow Transplant Program were eligible for inclusion in this retrospective chart review. Medical records were reviewed to evaluate letermovir dosing, CMV levels, laboratory values, and reports of adverse effects. Between October 2020 and April 2022, 9 patients age 4 to 19 years undergoing allogeneic HCT in the Pediatric Bone Marrow Transplant Program received letermovir prophylaxis, either 240 mg or 480 mg daily at a mean and median dose of 10 mg/kg/day. Letermovir was crushed and administered via nasogastric tube in 4 of 9 patients. Two patients received letermovir for secondary CMV prophylaxis after initial treatment with ganciclovir/valganciclovir, and the remaining 7 received letermovir for primary prophylaxis. One patient, a 20-kg 6-year-old female receiving 240 mg (12 mg/kg), experienced low-level CMV viremia while on letermovir. No other patients experienced CMV reactivation while on letermovir prophylaxis. In 2 patients, transient mild transaminitis was noted within the first weeks of letermovir therapy, which resolved without intervention, and its relationship to letermovir could not be clearly established. Letermovir administration was feasible and well tolerated as CMV prophylaxis in our small cohort of pediatric patients undergoing HCT. Larger, prospective studies are warranted to confirm the safety and efficacy of letermovir in children. © 2022 American Society for Transplantation and Cellular Therapy. Published by Elsevier Inc.
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Affiliation(s)
- Alexis Kuhn
- Department of Pharmacy, Mayo Clinic, Rochester, Minnesota.
| | - Jenna Puttkammer
- Department of Pharmacy, North Memorial Health Hospital, Robbinsdale, Minnesota
| | - Theresa Madigan
- Division of Pediatric Infectious Diseases, Mayo Clinic, Rochester, Minnesota
| | - Laura Dinnes
- Department of Pharmacy, Mayo Clinic, Rochester, Minnesota
| | - Shakila Khan
- Division of Pediatric Hematology/Oncology/Bone Marrow Transplant, Mayo Clinic, Rochester, Minnesota
| | - Asmaa Ferdjallah
- Division of Pediatric Hematology/Oncology/Bone Marrow Transplant, Mayo Clinic, Rochester, Minnesota
| | - Mira Kohorst
- Division of Pediatric Hematology/Oncology/Bone Marrow Transplant, Mayo Clinic, Rochester, Minnesota
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