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Jafari L, Hamidieh AA, Behfar M, Karamlou Y, Shamsipour M, Mohseni R, Farajifard H, Salajegheh P. Effect of Early Bacillus Calmette-Guerin Vaccination of Pediatric Severe Combined Immunodeficiency Patients on the Outcome of Hematopoietic Stem Cell Transplantation Using a Reduced-Intensity Conditioning Regimen. Transplant Cell Ther 2023; 29:188.e1-188.e8. [PMID: 36539079 DOI: 10.1016/j.jtct.2022.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 12/03/2022] [Accepted: 12/11/2022] [Indexed: 12/23/2022]
Abstract
The eminence of Bacillus Calmette-Guerin (BCG) vaccine in newborn vaccination programs has been conspicuous throughout the years, especially in low-income developing countries where tuberculosis is prevalent; however, application of the BCG vaccine is not without constraints, especially in patients afflicted with immunodeficiency diseases, such as severe combined immunodeficiency (SCID). The present study aimed to evaluate whether the administration of BCG vaccine at birth could improve the outcomes of hematopoietic stem cell transplantation (HSCT) in pediatric patients with SCID. In this study, 30 SCID patients who underwent HSCT using a reduced-intensity conditioning regimen (RIC) were followed-up for 2 years post-HSCT. The outcomes of HSCT were evaluated in both non-BCG-vaccinated patients (n = 12) and BCG-vaccinated patients (n = 18). Our results show a higher incidence of acute graft-versus-host disease (aGVHD), but not of chronic GVHD, in the BCG-vaccinated patients, and a similar overall survival (OS) rate in the 2 groups. We speculate that the similar OS rate in the 2 groups, despite the risk of BGC vaccination, was because this group received an RIC conditioning regimen. There was no other difference between the 2 groups. Considering the effect of the BCG vaccine on HSCT outcome, we suggest that the administration of BCG vaccine be deferred until age 3 months so that APT testing without the interference of maternal antibodies can be performed. However, this study could benefit from a larger cohort to further validate our findings, as the possible reason for some factors not being statistically significant was our small sample size.
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Affiliation(s)
- Leila Jafari
- Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Science, Tehran, Iran
| | - Amir Ali Hamidieh
- Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Science, Tehran, Iran.
| | - Maryam Behfar
- Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Science, Tehran, Iran
| | - Yalda Karamlou
- Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Science, Tehran, Iran
| | - Mansour Shamsipour
- Methodology and Data Analysis Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran; Epidemiology Center for Air Pollution Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Rashin Mohseni
- Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Science, Tehran, Iran
| | - Hamid Farajifard
- Pediatric Cell and Gene Therapy Research Center, Gene, Cell & Tissue Research Institute, Tehran University of Medical Science, Tehran, Iran
| | - Pouria Salajegheh
- Kerman University of Medical Sciences, Department of Pediatrics, School of Medicine, Tehran, Iran
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2
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Busca A, Lovisone E, Aliberti S, Locatelli F, Serra A, Scaravaglio P, Omedè P, Rossi G, Cirillo D, Barbui A, Ghisetti V, Dall'Omo AM, Falda M. Immune Reconstitution and Early Infectious Complications Following Nonmyeloablative Hematopoietic Stem Cell Transplantation. Hematology 2013; 8:303-11. [PMID: 14530172 DOI: 10.1080/10245330310001612125] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Non-myeloablative stem cell transplantation (NMT) has been increasingly used in compromised patients who would otherwise have been unable to undergo allotransplant. There is little understanding of the kinetics of immune reconstitution and its influence on infective complications following NMT. The aim of present study was to evaluate lymphocyte subset reconstitution over the first 12 months post-transplant in 15 adult patients receiving NMT with comparison to that of 30 patients grafted with a conventional hemopoietic stem cell transplantation (HSCT). NMT recipients were conditioned with fludarabine-based conditioning regimens. Peripheral blood stem cell (PBSC) was the source of stem cells in 13 NMT recipients and in 24 conventional HSCT recipients. Absolute numbers of helper (CD4+) T cells, naive (CD4+ CD45RA+) and memory (CD4+ CD45RO+) T cells as well as suppressor (CD8+) T cells, CD19+ B cells and NK cells were comparable in the two groups at all time points after transplantation. A median value of 200 CD4+ T cells/microl was achieved at 2 months post-transplant by the NMT and HSCT recipients. The CD4:CD8 ratio remained severely depressed throughout the study period. Almost all CD4+ lymphocytes expressed CD45RO antigen in the both groups of patients B lymphocytes showed low counts throughout the entire study period in both groups. Bacteremia and CMV antigenemia occurred respectively in 13 and 36% of the patients in the NMT group and in 15 and 39% of the patients in the HSCT group. Our preliminary data indicate that patients receiving a NMT have a lymphocyte reconstitution similar to that observed in patients who received a conventional HSCT. The incidence of bacteremia and CMV infection were not significantly different between the groups. Nevertheless, due to the small sample size, these results should be considered suggestive rather than definitive.
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Affiliation(s)
- Alessandro Busca
- Bone Marrow Transplant Unit, Azienda Ospedaliera San Giovanni Battista, Torino, Italy.
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3
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Fozza C, Longinotti M. T-cell receptor repertoire usage in hematologic malignancies. Crit Rev Oncol Hematol 2012; 86:201-11. [PMID: 23219015 DOI: 10.1016/j.critrevonc.2012.11.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 10/27/2012] [Accepted: 11/14/2012] [Indexed: 12/14/2022] Open
Abstract
Over the last few years several studies have addressed the possible influence of different immune mechanisms on the evolution of hematologic malignancies. More specifically, a fundamental role of reactive T-cells has now been demonstrated in the pathogenesis of many of these disorders as well as in the typical immunological milieu observed after stem cell transplantation in patients affected by these malignancies. In this context the study of the T-cell receptor (TCR) repertoire performed by different techniques, such as for instance flow cytometry and spectratyping, has undoubtedly provided a fundamental contribution. More recently, these seminal observations have even opened new potential therapeutic avenues based on the employment of adoptive T-cells somehow engineered toward potential neoplastic targets. This review will run through the most relevant studies which have tried to dissect the TCR repertoire usage in patients with different hematologic malignancies, especially focusing on the possible pathogenetic and therapeutic implications.
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Affiliation(s)
- Claudio Fozza
- Hematology, Department of Biomedical Sciences, University of Sassari, Viale San Pietro 12, 07100 Sassari, Italy.
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4
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DeCook LJ, Thoma M, Huneke T, Johnson ND, Wiegand RA, Patnaik MM, Litzow MR, Hogan WJ, Porrata LF, Holtan SG. Impact of lymphocyte and monocyte recovery on the outcomes of allogeneic hematopoietic SCT with fludarabine and melphalan conditioning. Bone Marrow Transplant 2012; 48:708-14. [PMID: 23103674 DOI: 10.1038/bmt.2012.211] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
We have recently shown that lymphocyte and monocyte recovery by day +100 are associated with survival post myeloablative allogeneic hematopoietic transplant for acute leukemia. We hypothesized that lymphocyte and monocyte recovery would have a similar impact on survival in the reduced intensity setting. To test this hypothesis, we analyzed clinical data from 118 consecutive fludarabine/melphalan-conditioned patients by correlating peripheral blood absolute lymphocyte counts and monocyte counts (ALC and AMC, respectively) at days +15, +30, +60 and +100 with the outcomes. Multivariate analysis revealed that day +100 AMC (risk ratio (RR) 0.22, 95% confidence interval (CI) 0.07-0.73, P=0.01) and mild chronic GVHD (RR 0.09, 95% CI 0.005-0.43, P=0.008) were independently associated with survival. To explore whether the patterns of lymphocyte and monocyte recovery had a prognostic value, we performed unsupervised hierarchical clustering on the studied hematopoietic parameters and identified three patient clusters, A-C. Patient clusters A and B both had improved OS compared with cluster C (77.8 months vs not reached vs 22.3 months, respectively, P<0.001). No patient in cluster C had a day +100 AMC >300. Both severe acute GVHD and relapse occurred more frequently in cluster C. Our data suggest that patients with low AMC by day +100 post fludarabine/melphalan-conditioned allogeneic hematopoietic SCT may be at risk for poor outcomes.
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Affiliation(s)
- L J DeCook
- Department of Medicine, Division of Hematology, Mayo Clinic Graduate School of Medicine, Rochester, MN, USA
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5
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Inaba H, Hartford CM, Pei D, Posner MJ, Yang J, Hayden RT, Srinivasan A, Triplett BM, McCulllers JA, Pui CH, Leung W. Longitudinal analysis of antibody response to immunization in paediatric survivors after allogeneic haematopoietic stem cell transplantation. Br J Haematol 2012; 156:109-17. [PMID: 22017512 PMCID: PMC3237834 DOI: 10.1111/j.1365-2141.2011.08913.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The long-term antibody responses to re-immunization in recipients of allogeneic haematopoietic stem cell transplantation (allo-HSCT) have not been well studied. We prospectively and longitudinally evaluated the antibody responses to eight vaccine antigens (diphtheria, tetanus, pertussis, measles, mumps, rubella, hepatitis B, and poliovirus) and assessed the factors associated with negative titres in 210 allo-HSCT recipients at St. Jude Children's Research Hospital. Antibody responses lasting for more than 5 years after immunization were observed in most patients for tetanus (95.7%), rubella (92.3%), poliovirus (97.9%), and, in diphtheria-tetanus-acellular pertussis (DTaP) recipients, diphtheria (100%). However, responses to pertussis (25.0%), measles (66.7%), mumps (61.5%), hepatitis B (72.9%), and diphtheria in tetanus-diphtheria (Td) recipients (48.6%) were less favourable, with either only transient antibody responses or persistently negative titres. Factors associated with vaccine failure were older age at immunization; lower CD3, CD4 or CD19 counts; higher IgM concentrations; positive recipient cytomegalovirus serology; negative titres before immunization; acute or chronic graft-versus-host disease; and radiation during preconditioning. These response patterns and clinical factors can be used to formulate re-immunization and monitoring strategies. Patients at risk for vaccine failure should have long-term follow-up; those with loss of antibody response or no seroconversion should receive booster immunizations.
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Affiliation(s)
- Hiroto Inaba
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, Tennessee
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
| | | | - Deqing Pei
- Department of Biostatistics, St. Jude Children’s Research Hospital, Memphis, Tennessee
| | - Meredith J. Posner
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, Tennessee
| | - Jie Yang
- Department of Biostatistics, St. Jude Children’s Research Hospital, Memphis, Tennessee
| | - Randall T. Hayden
- Department of Pathology, St. Jude Children’s Research Hospital, Memphis, Tennessee
| | - Ashok Srinivasan
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, Tennessee
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Brandon M. Triplett
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, Tennessee
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Jon A. McCulllers
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
- Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, Tennessee, USA
| | - Ching-Hon Pui
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, Tennessee
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Wing Leung
- Department of Oncology, St. Jude Children’s Research Hospital, Memphis, Tennessee
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
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6
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Memon SA, Sportès C, Flomerfelt FA, Gress RE, Hakim FT. Quantitative analysis of T cell receptor diversity in clinical samples of human peripheral blood. J Immunol Methods 2011; 375:84-92. [PMID: 21986106 DOI: 10.1016/j.jim.2011.09.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 09/21/2011] [Accepted: 09/23/2011] [Indexed: 12/19/2022]
Abstract
The analysis of T cell receptor diversity provides a clinically relevant and sensitive marker of repertoire loss, gain, or skewing. Spectratyping is a broadly utilized technique to measure global TCR diversity by the analysis of the lengths of CDR3 fragments in each Vβ family. However the common use of large numbers of T cells to obtain a global view of TCR Vβ CDR3 diversity has restricted spectratyping analyses when limited T-cell numbers are available in clinical setting, such as following transplant regimens. We here demonstrate that one hundred thousand T cells are sufficient to obtain a robust, highly reproducible measure of the global TCR Vβ repertoire diversity among twenty Vβ families in human peripheral blood. We also show that use of lower cell number results not in a dwindling of observed diversity but rather in non-reproducible patterns in replicate spectratypes. Finally, we report here a simple to use but sensitive method to quantify repertoire divergence in patient samples by comparison to a standard repertoire profile we generated from fifteen normal donors. We provide examples using this method to statistically evaluate the changes in the global TCR Vβ repertoire diversity that may take place during T subset immune reconstitution after hematopoietic stem cell transplantation or after immune modulating therapies.
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Affiliation(s)
- Sarfraz A Memon
- Experimental Transplantation and Immunology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892-1203, United States.
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7
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Williams KM, Mella H, Lucas PJ, Williams JA, Telford W, Gress RE. Single cell analysis of complex thymus stromal cell populations: rapid thymic epithelia preparation characterizes radiation injury. Clin Transl Sci 2010; 2:279-85. [PMID: 19750208 DOI: 10.1111/j.1752-8062.2009.00128.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Thymic epithelial cells (TECs) and dendritic cells are essential for the maintenance of thymopoiesis. Because these stromal elements define the progenitor niche, provide critical survival signals and growth factors, and direct positive and negative selection, detailed study of these populations is necessary to understand important elements for thymic renewal after cytotoxic injury. Study of TEC is currently hindered by lengthy enzymatic separation techniques with decreased viability. We present a new rapid separation technique that yields consistent viable TEC numbers in a quarter of the prior preparation time. Using this new procedure, we identify changes in stroma populations following total body irradiation (TBI). By flow cytometry, we show that TBI significantly depletes UEA+ medullary TEC, while sparing Ly51+ CD45- cells. Further characterization of the Ly51+ subset reveals enrichment of fibroblasts (CD45- Ly51+ MHCII-), while cortical TECs (CD45- Ly51+ MHCII+) were markedly reduced. Dendritic cells (CD11lc+ CD45+) were also decreased following TBI. These data suggest that cytotoxic preparative regimens may impair thymic renewal by reducing critical populations of cortical and medullary TEC, and that such thymic damage can be assessed by this new rapid separation technique, thereby providing a means of assessing optimal conditioning pretransplantfor enhancing thymic-dependent immune reconstitution posttranspiant.
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Affiliation(s)
- Kirsten M Williams
- Experimental Transplantation and Immunology Branch, National Cancer Institute, NIH, Bethesda, Maryland, USA.
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8
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Antiviral responses following L-leucyl-L-leucine methyl esther (LLME)-treated lymphocyte infusions: graft-versus-infection without graft-versus-host disease. Biol Blood Marrow Transplant 2009; 15:1609-19. [PMID: 19744572 DOI: 10.1016/j.bbmt.2009.08.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Accepted: 08/13/2009] [Indexed: 11/22/2022]
Abstract
Although allogeneic hematopoietic progenitor cell transplant (HPCT) is curative therapy for many disorders, it is associated with significant morbidity and mortality, which can be related to graft-versus-host disease (GVHD) and the immunosuppressive measures required for its prevention and/or treatment. Whether the immunosuppression is pharmacologic or secondary to graft manipulation, the graft recipient is left at increased risk of the threatening opportunistic infection. Refractory viral diseases in the immunocompromised host have been treated by infusion of virus-specific lymphotyces and by unmanipulated donor lymphocyte infusion (DLI) therapy. L-leucyl-L-leucine methyl ester (LLME) is a compound that induces programmed cell death of natural killer (NK) cells, monocytes, granulocytes, most CD8(+) T cells, and a small fraction of CD4(+) T cells. We have undertaken a study of the use of LLME-treated DLI following T cell-depleted allogeneic HPCT, specifically to aid with immune reconstitution. In this ongoing clinical trial, we have demonstrated the rapid emergence of virus-specific responses following LLME DLI with minimal associated GVHD. This paper examines the pace of immune recovery and the rapid development of antiviral responses in 6 patients who developed viral infections during the time period immediately preceding or coincident with the administration of the LLME DLI.
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9
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Mir MA, Battiwalla M. Immune deficits in allogeneic hematopoietic stem cell transplant (HSCT) recipients. Mycopathologia 2009; 168:271-82. [PMID: 19156534 DOI: 10.1007/s11046-009-9181-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Accepted: 12/31/2008] [Indexed: 01/08/2023]
Abstract
Immune deficits account for the high frequency of life threatening bacterial, viral, and fungal opportunistic infections seen in allogeneic HSCT recipients. Despite advances in infectious disease management, the integrity of host defenses remains the mainstay of defense. The intensity of the preparative regimen, degree of HLA matching, source of stem cells (marrow, blood, or cord), extent of T-cell depletion, and immunosuppressive therapy are some of the factors that impact the kinetics, characteristics, and quality of immune reconstitution. Graft-versus-host disease and its prophylaxis or treatment produce a host environment that is particularly vulnerable to infections. Mucosal disruption and prolonged severe neutropenia usually confine their impact to the early course of transplant. After initial engraftment, HSCT recipients remain at great risk for opportunistic infections and this is related to prolonged and severe T-lymphocyte dysfunction of a complex multifactorial nature. B cell dysfunction is less problematic clinically, but includes deficiencies of immunoglobulin subclasses and impaired ability to mount a vaccine response. Advances in understanding of these immune deficits have resulted in successful strategies including revaccination, growth factors, thymic protection, and adoptive cellular therapy with antigen-specific cells.
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Affiliation(s)
- Muhammad A Mir
- Division of Hematology, University at Buffalo, Buffalo, NY, USA
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10
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Overlap between in vitro donor antihost and in vivo posttransplantation TCR Vbeta use: a new paradigm for designer allogeneic blood and marrow transplantation. Blood 2008; 112:3517-25. [PMID: 18541718 DOI: 10.1182/blood-2008-03-145391] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Following allogeneic blood and marrow transplantation (BMT), mature donor T cells can enhance engraftment, counteract opportunistic infections, and mount graft-versus-tumor (GVT) responses, but at the risk of developing graft-versus-host disease (GVHD). With the aim of separating the beneficial effects of donor T cells from GVHD, one approach would be to selectively deplete subsets of alloreactive T cells in the hematopoietic cell inoculum. In this regard, TCR Vbeta repertoire analysis by CDR3-size spectratyping can be a powerful tool for the characterization of alloreactive T-cell responses. We investigated the potential of this spectratype approach by comparing the donor T-cell alloresponses generated in vitro against patient peripheral blood lymphocytes (PBLs) with those detected in vivo posttransplantation. The results indicated that for most Vbeta families that exhibited alloreactive CDR3-size skewing, there was a robust overlap between the in vitro antipatient and in vivo spectratype histograms. Thus, in vitro spectratype analysis may be useful for determining the alloreactive T-cell response involved in GVHD development and, thereby, could serve to guide select Vbeta family depletion for designer transplants to improve outcomes.
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11
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Friedman TM, Filicko-O'Hara J, Mookerjee B, Wagner JL, Grosso DA, Flomenberg N, Korngold R. T cell repertoire complexity is conserved after LLME treatment of donor lymphocyte infusions. Biol Blood Marrow Transplant 2008; 13:1439-47. [PMID: 18022573 DOI: 10.1016/j.bbmt.2007.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Accepted: 09/20/2007] [Indexed: 10/22/2022]
Abstract
Slow reconstitution of the T cell repertoire after allogeneic blood or bone marrow stem cell transplantation is a major risk factor for patient mortality. The delivery of immunocompetent T cells as delayed donor lymphocyte infusions (DLIs) is a potential way of counteracting this problem. The development of graft-versus-host disease (GVHD) is a potential complication of this procedure, however. We previously found that in P-->F1 haploidentical murine models, the ex-vivo treatment of donor lymphocytes with L-leucyl-L-leucine methyl ester (LLME) can prevent the onset of GVHD after DLI, likely by inducing cell death in most of the perforin-positive CD8(+) T cells and in a fraction of CD4(+) T cells. Our previous preclinical studies have formed the basis of an ongoing phase I clinical trial in which patients received LLME-treated DLI from their original donor in an attempt to accelerate T cell reconstitution. To understand how this treatment strategy might affect the complexity of the DLI T cell repertoire, we used T cell receptor Vbeta spectratype analysis to evaluate the DLI product pre-LLME and post-LLME treatment. The results indicated that the LLME-treated DLI product exhibited CDR3-size distribution complexities similar to those of its untreated donor sample. In addition, comparisons of the CD4(+) and CD8(+) T cell repertoire from the donor before LLME treatment with that of the recipient post-DLI demonstrated equal complexity for most of the resolvable Vbeta families. Finally, the in vitro proliferative capacity of LLME-treated DLI product in response to allo-stimulation in a one-way mixed lymphocyte reaction was comparable to that of the untreated product.
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Affiliation(s)
- Thea M Friedman
- The Cancer Center, Hackensack University Medical Center, Hackensack, New Jersey, USA
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12
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Jiménez M, Ercilla G, Martínez C. Immune reconstitution after allogeneic stem cell transplantation with reduced-intensity conditioning regimens. Leukemia 2007; 21:1628-37. [PMID: 17525730 DOI: 10.1038/sj.leu.2404681] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Reduced-intensity conditioning (RIC) regimens have been increasingly used as an alternative to conventional myeloablative conditioning (MAC) regimens for elderly patients, for patients medically infirm to qualify for conventional allogeneic stem cell transplantation (SCT), and for disorders in which traditional MAC-SCT are associated with high rates of non-relapse mortality. One of the theoretical advantages of RIC-SCT is that it might lend to better immune reconstitution after transplantation due to less damage of the thymus, allowing regeneration of naive T cells derived from prethymic donor stem cells, and due to the proliferation of immunologically competent host T cells that survive the conditioning regimen. Although limited, studies comparing immune recovery following RIC and MAC-SCT have been insightful. One of the main difficulties of these studies is the current spectrum of RIC protocols, which vary considerably in myeloablative and immunosuppressive potential, resulting in apparently contradictory findings. In spite of this, most reports have shown significant quantitative and/or qualitative differences in T- and B-cell reconstitution after RIC-SCT in comparison with conventional SCT. This paper will review current knowledge of immune reconstitution following RIC-SCT.
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Affiliation(s)
- M Jiménez
- Department of Hematology, Institute of Hematology and Oncology, Institut d'Investigacions Biomèdiques August Pi I Sunyer, IDIBAPS, Hospital Clínic, University of Barcelona, Barcelona, Spain.
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13
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Friedman TM, Azhipa O, Zilberberg J, Tkachuk Y, Hsu JW, Rowley SD, Goldberg SL, Korngold R, Pecora AL, Preti RA. Reconstitution of T cell subset repertoire diversity following multiple antigen-mismatched bone marrow transplantation. Biol Blood Marrow Transplant 2007; 12:1092-5. [PMID: 17084373 DOI: 10.1016/j.bbmt.2006.06.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Accepted: 06/20/2006] [Indexed: 11/24/2022]
MESH Headings
- Adult
- Animals
- Antilymphocyte Serum/administration & dosage
- Benzamides
- Blast Crisis/immunology
- Blast Crisis/surgery
- Bone Marrow Transplantation
- Cell Lineage
- Combined Modality Therapy
- Female
- Gene Rearrangement, T-Lymphocyte
- Graft vs Host Disease/prevention & control
- HLA Antigens/analysis
- Histocompatibility
- Humans
- Imatinib Mesylate
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/immunology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/surgery
- Lymphocyte Count
- Lymphocyte Depletion
- Male
- Myelodysplastic Syndromes/immunology
- Myelodysplastic Syndromes/surgery
- Piperazines/therapeutic use
- Pyrimidines/therapeutic use
- Rabbits
- Remission Induction
- T-Lymphocyte Subsets/cytology
- T-Lymphocyte Subsets/transplantation
- Tissue Donors
- Transplantation Conditioning
- Transplantation, Homologous/immunology
- Treatment Outcome
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14
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Chen X, Hale GA, Barfield R, Benaim E, Leung WH, Knowles J, Horwitz EM, Woodard P, Kasow K, Yusuf U, Behm FG, Hayden RT, Shurtleff SA, Turner V, Srivastava DK, Handgretinger R. Rapid immune reconstitution after a reduced-intensity conditioning regimen and a CD3-depleted haploidentical stem cell graft for paediatric refractory haematological malignancies. Br J Haematol 2006; 135:524-32. [PMID: 17010105 DOI: 10.1111/j.1365-2141.2006.06330.x] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The main obstacles to successful haploidentical haematopoietic stem cell transplantation from a mismatched family member donor are delayed immune reconstitution, vulnerability to infections and severe graft-versus-host disease (GvHD). We designed a reduced-intensity conditioning regimen that excluded total body irradiation and anti-thymocyte globulin in order to expedite immune reconstitution after a CD3-depleted haploidentical stem cell transplant. This protocol was used to treat 22 paediatric patients with refractory haematological malignancies. After transplantation, 91% of the patients achieved full donor chimaerism. They also showed rapid recovery of CD3(+) T-cells, T-cell receptor (TCR) excision circle counts, TCRbeta repertoire diversity and natural killer (NK)-cells during the first 4 months post-transplantation, compared with those results from a group of patients treated with a myeloablative conditioning regimen. The incidence and extent of viremia were limited and no lethal infection was seen. Only 9% of patients had grade 3 acute GvHD, while 27% patients had grade 1 and another 27% had grade 2 acute GvHD. This well-tolerated regimen appears to accelerate immune recovery and shorten the duration of early post-transplant immunodeficiency, thereby reducing susceptibility to viral infections. Rapid T-cell reconstitution, retention of NK-cells in the graft and induction of low grade GvHD may also enhance the potential anti-cancer immune effect.
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Affiliation(s)
- Xiaohua Chen
- Division of Bone Marrow Transplantation, St Jude Children's Research Hospital, Memphis, TN, USA
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15
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Miqueu P, Guillet M, Degauque N, Doré JC, Soulillou JP, Brouard S. Statistical analysis of CDR3 length distributions for the assessment of T and B cell repertoire biases. Mol Immunol 2006; 44:1057-64. [PMID: 16930714 DOI: 10.1016/j.molimm.2006.06.026] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2006] [Accepted: 06/15/2006] [Indexed: 12/20/2022]
Abstract
Complementarity-determining region 3 (CDR3) length distribution analysis explores the diversity of the T cell receptor (TCR) and immunoglobulin (Ig) repertoire at the transcriptome level. Studies of the CDR3, the most hypervariable part of these molecules, have been frequently used to identify recruitment of T and B cell clones involved in immunological responses. CDR3 length distribution analysis gives a clear perception of repertoire variations between individuals and over time. However, the complexity of CDR3 length distribution patterns and the high number of possible repertoire alterations per individual called for the development of robust data analysis methods. The goal of these methods is to identify, quantify and statistically assess differences between repertoires so as to offer a better diagnostic or predictive tool for pathologies involving the immune system. In this review we will explain the benefit of analyzing CDR3 length distribution for the study of immune cell diversity. We will start by describing this technology and its associated data processing, and will subsequently focus on the statistical methods used to compare CDR3 length distribution patterns. Finally, we will address the various methods for assessing CDR3 length distribution gene signatures in pathological states.
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Affiliation(s)
- Patrick Miqueu
- Institut National de la Santé Et de la Recherche Médicale (I.N.S.E.R.M.), Unité 643, "Immunointervention dans les Allo et Xénotransplantations", CHU Hôtel-Dieu, 30 Bd Jean Monnet, 44093 Nantes Cedex 01, France
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16
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Lamba R, Carrum G, Myers GD, Bollard CM, Krance RA, Heslop HE, Brenner MK, Popat U. Cytomegalovirus (CMV) infections and CMV-specific cellular immune reconstitution following reduced intensity conditioning allogeneic stem cell transplantation with Alemtuzumab. Bone Marrow Transplant 2006; 36:797-802. [PMID: 16151431 DOI: 10.1038/sj.bmt.1705121] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We studied the incidence and recurrence of Cytomegalovirus (CMV) infection and reactivation in 38 recipients of Alemtuzumab reduced intensity conditioning-stem cell transplantation, and used CMV-HLA tetramer studies to discover if these events correlated with recovery of circulating CMV-specific CD8+ T cells (cytotoxic T lymphocyte (CTLs)). The cumulative incidence of CMV infection was 60% at 1 year (95% CI, 45-78%) with a median reactivation time of 24 days (range 5-95 days). All patients with CMV reactivation received Ganciclovir or Foscarnet, and only one developed CMV disease. More strikingly, only 8/21 patients had relapse of CMV antigenemia. Tetramer analysis in 13 patients showed that 11 reconstituted CMV CTLs (7/11 by day 30 and 10/11 by day 90). The development of CMV infection was accompanied by a >5-fold rise of CMV CTLs. Recurrence of CMV infection occurred only in the patients who failed to generate a CTL response to the virus. Hence, recipients of SCT using Alemtuzumab-RIC are initially profoundly immunosuppressed and have a high incidence of early CMV reactivation. However, in the majority of patients, infection is transient, and antiviral T cell reconstitution is rapid. Monitoring with CMV-specific CTLs may help identify the subset of patients at risk from recurrent infection or disease.
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Affiliation(s)
- R Lamba
- Department of Medicine, Baylor College of Medicine and The Methodist Hospital, Houston, TX 77030, USA.
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17
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Jiménez M, Martínez C, Ercilla G, Carreras E, Urbano-Ispízua A, Aymerich M, Villamor N, Amézaga N, Rovira M, Fernández-Avilés F, Gaya A, Martino R, Sierra J, Montserrat E. Reduced-intensity conditioning regimen preserves thymic function in the early period after hematopoietic stem cell transplantation. Exp Hematol 2005; 33:1240-8. [PMID: 16219547 DOI: 10.1016/j.exphem.2005.06.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2005] [Revised: 06/07/2005] [Accepted: 06/08/2005] [Indexed: 01/25/2023]
Abstract
OBJECTIVE To compare T-cell reconstitution in two groups of patients submitted to allogeneic stem cell transplantation (SCT): those receiving reduced-intensity conditioning (RIC, n = 24) and those receiving myeloablative conditioning (MA, n = 27). METHODS Fifty-one consecutive patients undergoing SCT were evaluated. Serial assessments of lymphocyte subsets and T cell receptor excision circles (TRECs) levels were performed using multiparametric flow cytometry and real-time PCR, respectively. RESULTS During the first 6 months posttransplant, total and naïve CD4(+) T cell counts were higher after RIC-SCT than after MA-SCT (total CD4(+): p = 0.04, p = 0.08, and p = 0.058; naïve CD4(+): p = 0.14, p = 0.05, and p = 0.01 at 1, 3, and 6 months, respectively). In both groups of patients, TRECs levels were low or undetectable in the first 3 months after SCT and progressively increased during the study. However, a higher proportion of patients with detectable levels of TRECs was observed in RIC-SCT at 1 and 3 months and more patients in this group reached normal levels of TRECs at 6 months post-SCT. In the multivariate analysis, including factors such as type of donor (sibling vs unrelated), dose of CD34(+) cells infused with the graft, patient age, and graft-vs-host disease (GVHD), the most important factor influencing TRECs recovery in the early period after SCT was the type of conditioning regimen. CONCLUSIONS In this study, the pattern of immune reconstitution after RIC-SCT was different from that of MA-SCT and was characterized by higher posttransplant naïve CD4(+) T cell counts and TRECs levels in the early period after transplant.
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Affiliation(s)
- Mónica Jiménez
- Department of Hematology, Institute of Hematology and Oncology, Institut d'Investigacions Biomèdiques August Pi I Sunyer, IDIBAPS, Hospital Clínic, University of Barcelona, Barcelona, Spain
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18
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Riley RS, Idowu M, Chesney A, Zhao S, McCarty J, Lamb LS, Ben-Ezra JM. Hematologic aspects of myeloablative therapy and bone marrow transplantation. J Clin Lab Anal 2005; 19:47-79. [PMID: 15756708 PMCID: PMC6807857 DOI: 10.1002/jcla.20055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The transplantation of bone marrow cells or isolated hematopoietic stem cells from the bone marrow or peripheral blood is a widely utilized form of therapy for patients with incurable diseases of the hematopoietic and immune systems. Successful engraftment of the transplanted stem cells in an adequately prepared recipient normally leads to bone marrow reconstitution over a period of several weeks, accompanied by more gradual reconstitution of the immune system. Since the recipient is profoundly ill during the initial treatment period, laboratory data is critical for monitoring engraftment, detecting residual/recurrent disease, and identifying problems that may delay bone marrow reconstitution or lead to other medical complications. Accurate blood cell counts are imperative, and most bone marrow transplantation patients undergo periodic monitoring with bone marrow aspirates and biopsies with cytogenetic, molecular, and multiparametric flow cytometric studies. The potential complications of bone marrow transplantation include engraftment failure and delayed engraftment, infection, residual bone marrow disease, acute and chronic graft versus host disease, myelofibrosis, therapy-related acute leukemia, post-transplant lympho-proliferative disorders, and toxic myelopathy.
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Affiliation(s)
- Roger S Riley
- Medical College of Virginia Hospitals, Virginia Commonwealth University, Richmond, Virginia 23298-0250, USA.
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19
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Zambelli A, Lilleri D, Pedrazzoli P, Peccatori J, Baldanti F, Fregoni V, Ciceri F, Caldera D, Renga M, Colombo AA, Alessandrino EP, Gerna G, Da Prada GA, Siena S, Bregni M. Incidence of Human Cytomegalovirus Infection in Patients with Refractory Solid Tumors Receiving Nonmyeloablative Allogeneic Stem Cell Transplants versus Recipients of Standard SCT for Hematologic Malignancies. Biol Blood Marrow Transplant 2005; 11:423-8. [PMID: 15931630 DOI: 10.1016/j.bbmt.2005.02.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Human cytomegalovirus (HCMV) infection is the most frequent infectious complication after conventional allogeneic stem cell transplantation (alloSCT). From December 1998 to December 2002, we prospectively monitored HCMV reactivation in 59 patients affected by solid tumors and undergoing nonmyeloablative alloSCT (NST). Patients were allografted from HLA-identical sibling donors after fludarabine/cyclophosphamide-based conditioning regimens. Seventeen (28.8%) of 59 patients presented with HCMV antigenemia, and 14 received ganciclovir, with successful HCMV clearance in all cases. No patient developed HCMV viremia or disease. The median time to HCMV reactivation was 54 days (range, 16-245 days) after NST. These patients were compared with a cohort of hematologic patients who were treated with conventional myeloablative alloSCT. Matching criteria included HCMV risk group, stem cell source, donor type, and age. In the myeloablative group, HCMV active infection was observed in 47 (85.4%) of 55 patients at a median time of 30 days (range, 13-64 days) after alloSCT, and HCMV infection occurred more frequently ( P < .001) and earlier ( P = .001) than in NST patients. Patients affected with solid tumors undergoing NST had a reduced and delayed incidence of HCMV active infection.
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Affiliation(s)
- A Zambelli
- U. O. Oncologia Medica I, IRCCS, Fondazione Salvatore Maugeri, Pavia, Italy.
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20
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Auletta JJ, Lazarus HM. Immune restoration following hematopoietic stem cell transplantation: an evolving target. Bone Marrow Transplant 2005; 35:835-57. [PMID: 15778723 DOI: 10.1038/sj.bmt.1704966] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hematopoietic stem cell transplantation (HSCT) is the definitive cure for many malignant and nonmalignant diseases. However, delays in immune reconstitution (IR) following HSCT significantly limit the success of transplantation and increase the risk for infection and disease relapse in the transplant recipient. Therefore, ways to measure and to manipulate immune recovery following HSCT are emerging and their success depends directly upon an enhanced understanding for the underlying mechanisms responsible for reconstituted immunity and hematopoiesis. Recent discoveries in the activation, function, and regulation of dendritic cell (DC), natural killer (NK) cell, and T-lymphocyte subtypes have been critical in developing immunotherapies used to prevent graft-versus-host disease and to enhance graft-versus-leukemia. For example, regulatory T cells that induce tolerance and NK receptor-tumor ligand disparities that result in tumor lysis are being used to minimize GVHD and tumor burden, respectively. Furthermore, expansion and modulation of immune effector cells are being used to augment hematopoietic and immune recovery and to decrease transplant-related toxicity in the transplant recipient. Specifically, DC expansion and incorporation into antitumor and anti-microbial vaccines is fast approaching application into clinical trials. This paper will review our current understanding for IR following HSCT and the novel ways in which to restore immune function and decrease transplant-related toxicity in the transplant recipient.
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Affiliation(s)
- J J Auletta
- Comprehensive Cancer Center, Case Western Reserve University/University Hospitals of Cleveland, Cleveland, OH, USA.
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21
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Wils EJ, Cornelissen JJ. Thymopoiesis following allogeneic stem cell transplantation: new possibilities for improvement. Blood Rev 2005; 19:89-98. [PMID: 15603912 DOI: 10.1016/j.blre.2004.04.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Treatment related mortality (TRM) has restricted the application of allogeneic hematopoietic stem cell transplantation (allo-SCT) as a treatment modality for patients with a variety of malignant and non-malignant hematological disorders. TRM is mainly caused by severe opportunistic infections, due to an impaired immune reconstitution. The extreme slow recovery of newly developed, donor stem cell derived naive T-cells is currently considered to be the most important determinant of the impaired immune competence after allo-SCT. Therefore, enhancing naive T-cell recovery following allo-SCT by improving thymopoiesis has recently gained new interest. Possible strategies to improve thymopoiesis may include approaches to protect the nursing stromal compartment and approaches to directly stimulate the differentiation and proliferation of T-cell progenitors intra-thymically. Among the latter is interleukin-7 (IL-7), which has appeared promising in preclinical experimental settings and is expected to enter early clinical studies soon. Keratinocyte growth factor (KGF) is an epithelial growth factor that may protect the thymic epithelium and thereby may preserve it's support of thymopoiesis. KGF has been evaluated clinically in the setting of autologous stem cell transplantation and studies in the setting of allo-SCT are awaited in the near future.
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Affiliation(s)
- Evert-Jan Wils
- Department of Hematology, Erasmus University Medical Center Rotterdam, Dr. Molewaterplein 50, 3015 GE Rotterdam, The Netherlands
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22
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Koh LP, Chao NJ. Umbilical cord blood transplantation in adults using myeloablative and nonmyeloablative preparative regimens. Biol Blood Marrow Transplant 2004; 10:1-22. [PMID: 14752775 DOI: 10.1016/j.bbmt.2003.09.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Unrelated umbilical cord blood (UCB) transplantation has recently been explored in an increasing number of adult patients. The relative ease of procurement and the lower-than-anticipated risk of severe acute graft-versus-host disease has made UCB transplantation an appealing alternative to bone marrow-derived hematopoietic stem cells. The use of reduced-intensity or nonmyeloablative preparative regimens to allow engraftment of UCB broadens the scope of patients who may benefit from allogeneic immunotherapy, including elderly and medically infirm patients with no matched sibling donor. This review summarizes the available data on the use of UCB as an alternative source of hematopoietic stem cell transplantation in adult patients.
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Affiliation(s)
- Liang-Piu Koh
- Duke University Medical Center, Durham, North Carolina 27710, USA
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23
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Del Toro G, Satwani P, Harrison L, Cheung YK, Brigid Bradley M, George D, Yamashiro DJ, Garvin J, Skerrett D, Bessmertny O, Wolownik K, Wischhover C, van de Ven C, Cairo MS. A pilot study of reduced intensity conditioning and allogeneic stem cell transplantation from unrelated cord blood and matched family donors in children and adolescent recipients. Bone Marrow Transplant 2004; 33:613-22. [PMID: 14730337 DOI: 10.1038/sj.bmt.1704399] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Reduced intensity (RI) allogeneic stem cell transplantation (AlloSCT) was initially demonstrated in adults following HLA-matched family and unrelated adult donor AlloSCT. There is little information about RI AlloSCT in children. We report results of a pilot study of RI AlloSCT in 21 recipients (< or =21 years). Age: median 13 (0.5-21) years, 8F:13M, 14 unrelated cord blood units (UCB) (10 4/6, 4 5/6), two related BM (6/6, 5/6), four related PBSC (2 6/6, 2 5/6), and one related BM+PBSC (6/6). RI: fludarabine, busulfan (n=14); fludarabine, cyclophosphamide (n=4); fludarabine, melphalan (n=1); total body irradiation, fludarabine, cyclophosphamide (n=1); or fludarabine, cyclophosphamide, and etoposide (n=1). Graft-versus-host disease prophylaxis: FK506 0.03 mg/kg/day and mycophenolate mofetil 15 mg/kg/q 12 h. UCB median nuc/kg and CD34/kg was 4.3 x 10(7)/kg (0.9-10.8) and 1.9 x 10(5)/kg (0.3-6.9), and related BM/PBSC median nuc/kg and CD34/kg was 8.3 x 10(8) (4.7-18.9) and 5.0 x 10(6)/kg (4.6-6.4). Maximal chimerism following unrelated cord blood transplantation, 100% x 7, 98% x 1, 95% x 2, 55% x 1, and 0% x 3; related PBSC/BM, 100% x 5, 65% x 1, and 55% x 1. Graft failure occurred in 5/21 (24%). In summary, RI AlloSCT in children is feasible and tolerable (< or =25% GF) and results in > or =85% of recipients initially achieving > or =50% donor chimerism.
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Affiliation(s)
- G Del Toro
- Department of Pediatrics, Children's Hospital New York-Presbyterian, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10032, USA
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24
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Baron F, Schaaf-Lafontaine N, Humblet-Baron S, Meuris N, Castermans E, Baudoux E, Frère P, Bours V, Fillet G, Beguin Y. T-cell reconstitution after unmanipulated, CD8-depleted or CD34-selected nonmyeloablative peripheral blood stem-cell transplantation. Transplantation 2003; 76:1705-13. [PMID: 14688520 DOI: 10.1097/01.tp.0000093987.11389.f7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND We have previously shown that CD8 depletion or CD34 selection of peripheral blood stem cells (PBSC) reduced the incidence of acute graft-versus-host disease (GvHD) after nonmyeloablative stem-cell transplantation (NMSCT). In this study, we analyze the effect of CD8 depletion or CD34 selection of the graft on early T-cell reconstitution. METHODS Nonmyeloablative conditioning regimen consisted in 2 Gy total-body irradiation (TBI) alone, 2 Gy TBI and fludarabine, or cyclophosphamide and fludarabine. Patients 1 to 18 received unmanipulated PBSC, patients 19 to 29 CD8-depleted PBSC, and patients 30 to 35 CD34-selected PBSC. RESULTS T-cell counts, and particularly CD4+ and CD4CD45RA+ counts, remained low the first 6 months after nonmyeloablative stem-cell transplantation (NMSCT) in all patients. CD34 selection (P<0.0001) but not CD8 depletion of PBSC significantly decreased T-cell chimerism. Donor T-cell count was similar in unmanipulated compared with CD8-depleted PBSC recipients but was significantly lower in CD34-selected PBSC recipients (P=0.0012). T cells of recipient origin remained stable over time in unmanipulated and CD8-depleted PBSC patients but expanded in some CD34-selected PBSC recipients between day 28 and 100 after transplant. Moreover, whereas CD8 depletion only decreased CD8+ counts (P<0.047), CD34 selection reduced CD3+(P<0.001), CD8+(P<0.016), CD4+ (P<0.001), and CD4+CD45RA+ (P<0.001) cell counts. T-cell repertoire was restricted in all patients on day 100 after hematopoietic stem-cell transplantation but was even more limited after CD34 selection (P=0.002). CONCLUSIONS Despite of the persistence of a significant number of T cells of recipient origin, T-cell counts were low the first 6 months after NMSCT. Moreover, contrary with CD8 depletion of the graft that only affects CD8+ lymphocyte counts, CD34 selection dramatically decreased both CD8 and CD4 counts.
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Affiliation(s)
- Frédéric Baron
- Department of Medicine, Division of Hematology, University of Liège, CHU Sart-Tilman, 4000 Liège, Belgium
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25
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Petersen SL, Ryder LP, Björk P, Madsen HO, Heilmann C, Jacobsen N, Sengeløv H, Vindeløv LL. A comparison of T-, B- and NK-cell reconstitution following conventional or nonmyeloablative conditioning and transplantation with bone marrow or peripheral blood stem cells from human leucocyte antigen identical sibling donors. Bone Marrow Transplant 2003; 32:65-72. [PMID: 12815480 DOI: 10.1038/sj.bmt.1704084] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This retrospective study compares the reconstitution of T, B and NK cells in three groups of patients transplanted for haematological malignancies with grafts from their HLA-identical sibling donors. In all, 15 patients received PBSC after a nonmyeloablative conditioning regimen consisting of fludarabine and 200 cGy TBI, 13 patients received PBSC after myeloablative conditioning and 37 patients received BM after myeloablative conditioning. In the nonmyeloablative group, the NK cells normalised after 1 month, the CD8+ T cells normalised after 3 months, the CD4+ T cells reached near normal values after 9 months and the B cell values were reduced until 12 months after transplant. In the two myeloablative groups, recipients of PBSC had a significantly higher number of CD4+ T cells after 4 months (P=0.004) and after 12 months (P=0.001), than recipients of BM. We found no differences in the T cell reconstitution between the two PBSC groups. This was of interest as the recipients of nonmyeloablative conditioning were older (P<0.001) and had a higher occurrence of chronic GVHD (P<0.05) than the recipients of myeloablative conditioning. In contrast, the recipients of nonmyeloablative conditioning had a delayed B cell recovery when compared to the patients who received myeloablative conditioning (P=0.04).
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Affiliation(s)
- S L Petersen
- The Lymphocyte Research Laboratory, Rigshospitalet, Copenhagen, Denmark
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