1
|
Ivanova E, Hue-Beauvais C, Chaulot-Talmon A, Castille J, Laubier J, De Casanove C, Aubert-Frambourg A, Germon P, Jammes H, Le Provost F. DNA methylation and gene expression changes in mouse mammary tissue during successive lactations: part II - the impact of lactation rank. Epigenetics 2023; 18:2215620. [PMID: 37219968 DOI: 10.1080/15592294.2023.2215620] [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: 12/01/2022] [Revised: 05/09/2023] [Accepted: 05/12/2023] [Indexed: 05/25/2023] Open
Abstract
Mastitis is among the main reasons women cease breastfeeding. In farm animals, mastitis results in significant economic losses and the premature culling of some animals. Nevertheless, the effect of inflammation on the mammary gland is not completely understood. This article discusses the changes to DNA methylation in mouse mammary tissue caused by lipopolysaccharide-induced inflammation after in vivo intramammary challenges and the differences in DNA methylation between 1st and 2nd lactations. Lactation rank induces 981 differential methylations of cytosines (DMCs) in mammary tissue. Inflammation in 1st lactation compared to inflammation in 2nd lactation results in the identification of 964 DMCs. When comparing inflammation in 1st vs. 2nd lactations with previous inflammation history, 2590 DMCs were identified. Moreover, Fluidigm PCR data show changes in the expression of several genes related to mammary function, epigenetic regulation, and the immune response. We show that the epigenetic regulation of two successive physiological lactations is not the same in terms of DNA methylation and that the effect of lactation rank on DNA methylation is stronger than that of the onset of inflammation. The conditions presented here show that few DMCs are shared between comparisons, suggesting a specific epigenetic response depending on lactation rank, the presence of inflammation, and even whether the cells had previously suffered inflammation. In the long term, this information could lead to a better understanding of the epigenetic regulation of lactation in both physiological and pathological conditions.Abbreviations: RRBS, reduced representation bisulphite sequencing; RT-qPCR, real-time quantitative polymerase chain reaction; MEC, mammary epithelial cells; MaSC, mammary stem cell; TSS, transcription start site; TTS, transcription termination site; UTR, untranslated region; SINE, short interspersed nuclear element; LINE, long interspersed nuclear element; CGI, CpG island; DEG, differentially expressed gene; DMC, differentially methylated cytosine; DMR, differentially methylated region; GO term, gene ontology term; MF, molecular function; BP, biological process.
Collapse
Affiliation(s)
- E Ivanova
- INRAE, AgroParisTech, GABI, Université Paris-Saclay, Jouy-en-Josas, France
| | - C Hue-Beauvais
- INRAE, AgroParisTech, GABI, Université Paris-Saclay, Jouy-en-Josas, France
| | - A Chaulot-Talmon
- UVSQ, INRAE, BREED, Université Paris-Saclay, Jouy-en-Josas, France
- BREED, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - J Castille
- INRAE, AgroParisTech, GABI, Université Paris-Saclay, Jouy-en-Josas, France
| | - J Laubier
- INRAE, AgroParisTech, GABI, Université Paris-Saclay, Jouy-en-Josas, France
| | - C De Casanove
- INRAE, AgroParisTech, GABI, Université Paris-Saclay, Jouy-en-Josas, France
| | - A Aubert-Frambourg
- UVSQ, INRAE, BREED, Université Paris-Saclay, Jouy-en-Josas, France
- BREED, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - P Germon
- INRAE, Université de Tours, Nouzilly, France
| | - H Jammes
- UVSQ, INRAE, BREED, Université Paris-Saclay, Jouy-en-Josas, France
- BREED, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - F Le Provost
- INRAE, AgroParisTech, GABI, Université Paris-Saclay, Jouy-en-Josas, France
| |
Collapse
|
2
|
Transgenic HA-1-Specific CD8 + T-Lymphocytes Selectively Target Leukemic Cells. Cancers (Basel) 2023; 15:cancers15051592. [PMID: 36900382 PMCID: PMC10000933 DOI: 10.3390/cancers15051592] [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: 01/31/2023] [Revised: 02/24/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
A significant share of allogeneic hematopoietic stem cell transplantations (allo-HSCT) results in the relapse of malignant disease. The T cell immune response to minor histocompatibility antigens (MiHAs) promotes a favorable graft-versus-leukemia response. The immunogenic MiHA HA-1 is a promising target for leukemia immunotherapy, as it is predominantly expressed in hematopoietic tissues and presented by the common HLA A*02:01 allele. Adoptive transfer of HA-1-specific modified CD8+ T cells could complement allo-HSCT from HA-1- donors to HA-1+ recipients. Using bioinformatic analysis and a reporter T cell line, we discovered 13 T cell receptors (TCRs) specific for HA-1. Their affinities were measured by the response of the TCR-transduced reporter cell lines to HA-1+ cells. The studied TCRs showed no cross-reactivity to the panel of donor peripheral mononuclear blood cells with 28 common HLA alleles. CD8+ T cells after endogenous TCR knock out and introduction of transgenic HA-1-specific TCR were able to lyse hematopoietic cells from HA-1+ patients with acute myeloid, T-, and B-cell lymphocytic leukemia (n = 15). No cytotoxic effect was observed on cells from HA-1- or HLA-A*02-negative donors (n = 10). The results support the use of HA-1 as a target for post-transplant T cell therapy.
Collapse
|
3
|
Story CM, Wang T, Bhatt VR, Battiwalla M, Badawy SM, Kamoun M, Gragert L, Brown V, Baxter-Lowe LA, Marsh SGE, Gadalla SM, Schetelig J, Mytilineos J, Miklos D, Waller EK, Kuxhausen M, Spellman S, Lee S, Paczesny S, Lansford JL, Vincent BG, Riches ML, Armistead PM. Genetics of HLA Peptide Presentation and Impact on Outcomes in HLA-Matched Allogeneic Hematopoietic Cell Transplantation. Transplant Cell Ther 2021; 27:591-599. [PMID: 33882342 DOI: 10.1016/j.jtct.2021.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 04/06/2021] [Accepted: 04/08/2021] [Indexed: 01/06/2023]
Abstract
Minor histocompatibility antigens (mHAs), recipient-derived peptide epitopes presented on the cell surface, are known to mediate graft-versus-host disease (GVHD); however, there are no current methods to associate mHA features with GVHD risk. This deficiency is due in part to the lack of technological means to accurately predict, let alone confirm, the tremendous number of potential mHAs in each individual transplant. Previous studies have shown that different HLA molecules present varying fractions of candidate peptide epitopes; however, the genetic "distance" between HLA-matched donors and recipients is relatively constrained. From these 2 observations, it is possible that the HLA type for a donor-recipient pair (DRP) would provide a surrogate measurement of the number of predicted mHAs, which could be related to GVHD risk. Because different HLA molecules present variable numbers of peptide antigens, a predicted cumulative peptide-binding efficiency can be calculated for individual DRP based on the pair's HLA type. The purpose of this study was to test whether cumulative peptide-binding efficiency is associated with the risk of acute GVHD (aGVHD) or relapse. In this retrospective Center for International Blood and Marrow Transplant Research study, a total of 3242 HLA-matched DRPs were analyzed for predicted cumulative peptide-binding efficiency using their HLA types and were divided into tertiles based on their scores. Univariable and multivariable analyses was performed to test for associations between cumulative peptide-binding efficiency for DRPs, divided into the HLA-matched related donor (MRD) and HLA-matched unrelated donor (MUD) cohorts, and the primary outcomes of aGVHD and relapse. Secondary outcomes investigated included overall survival, disease-free survival, and transplantation-related mortality. Using a computationally generated peptidome as a test dataset, the tested series of HLA class I displayed peptide-binding frequencies ranging from 0.1% to 3.8% of the full peptidome, and HLA class II molecules had peptide-binding frequencies of 12% to 77% across the HLA-DRB1 allotypes. By increasing binding efficiency tertile, the cumulative incidence of aGVHD at 6 months for MUD patients was 41%, 41%, and 45% for HLA class I (P = .336) and 44%, 41%, and 42% for HLA class II (P = .452). The cumulative incidences of relapse at 3 years for MUD transplant recipients were 36%, 38%, and 38% for HLA class I (P = .533) and 37%, 37%, and 38% for HLA class II (P = .896). The findings were similar for MRD transplant recipients. Multivariable analysis did not identify any impact of peptide-binding efficiency on aGVHD or relapse in MUD or MRD transplant recipients. Whereas GVHD is mediated by minor antigen mismatches in the context of HLA-matched allo-HCT, peptide-binding efficiency, which was used as a surrogate measurement for predicted number of binding antigens, did not provide additional clinical information for GVHD risk assessment. The negative result may be due to the limitations of this surrogate marker, or it is possible that GVHD is driven by a subset of immunogenic mHAs. Further research should be directed at direct mHA epitope and immunogenicity prediction.
Collapse
Affiliation(s)
| | - Tao Wang
- Center for International Blood and Marrow Transplant Research, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Vijaya Raj Bhatt
- The Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, Nebraska
| | - Minoo Battiwalla
- Director of Outcomes Research, Sarah Cannon Blood Cancer Network, Nashville, Tennessee
| | - Sherif M Badawy
- Division of Hematology, Oncology and Stem Cell Transplant, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois; Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Malek Kamoun
- Pathology and Laboratory Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Loren Gragert
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, Louisiana
| | - Valerie Brown
- Division of Pediatric Oncology/Hematology, Department of Pediatrics, Penn State Hershey Children's Hospital and College of Medicine, Hershey, Pennsylvania
| | - Lee Ann Baxter-Lowe
- Director of HLA Laboratory, Children's Hospital of Los Angeles, Los Angeles, California
| | - Steven G E Marsh
- Anthony Nolan Research Institute & University College London Cancer Institute, Royal Free Campus, London, United Kingdom
| | - Shahinaz M Gadalla
- Division of Cancer Epidemiology & Genetics, NIH-NCI Clinical Genetics Branch, Rockville, Maryland
| | - Johannes Schetelig
- Department of Internal Medicine I, University Hospital Carl Gustav Carus, TU Dresden, and DKMS, Clinical Trials Unit, Dresden, Germany
| | | | - David Miklos
- BMT and Cell Therapy Division, Department of Medicine, Stanford Health Care, Stanford, California
| | - Edmund K Waller
- Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University, Atlanta, Georgia
| | - Michelle Kuxhausen
- Center for International Blood and Marrow Transplant Research, Minneapolis, Minnesota
| | - Stephen Spellman
- Center for International Blood and Marrow Transplant Research, Minneapolis, Minnesota
| | - Stephanie Lee
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Sophie Paczesny
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, South Carolina
| | - Jefferson L Lansford
- Orthopedic Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland
| | - Benjamin G Vincent
- BMTCT Program, Division of Hematology, University of North Carolina, Chapel Hill, North Carolina; BMTCT Program, Division of Hematology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina
| | - Marcie L Riches
- BMTCT Program, Division of Hematology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina
| | - Paul M Armistead
- Internal Medicine, University of North Carolina, Chapel Hill, North Carolina; BMTCT Program, Division of Hematology and Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina.
| |
Collapse
|
4
|
Cattina F, Bernardi S, Mantovani V, Toffoletti E, Santoro A, Pastore D, Martino B, Console G, Martinelli G, Malagola M. Single step multiple genotyping by MALDI-TOF mass spectrometry, for evaluation of minor histocompatibility antigens in patients submitted to allogeneic stem cell transplantation from HLA-matched related and unrelated donor. Hematol Rep 2017; 9:7051. [PMID: 29071050 PMCID: PMC5641860 DOI: 10.4081/hr.2017.7051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 04/11/2017] [Indexed: 11/22/2022] Open
Abstract
The outcome of patients underwent to allogeneic stem cell transplantation (allo- SCT) is closely related to graft versus host disease (GvHD) and graft versus leukemia (GvL) effects which can be mediated by mHAgs. 23 mHAgs have been identified and reported to be differently correlated with GVHD or GVL and the aim of this work was develop a method to genotype the mHAgs described so far. For this study we used MALDI-TOF iPLEX Gold Mass Array technology. We tested 46 donor/recipient matched pairs that underwent allo-SCT because of Philadelphia positive (Ph+) chronic myeloid leukemia (n=29) or Ph+ acute lymphoblastic leukemia (n=17). Our data show that sibling pairs had a lesser number of mHAgs mismatches compared to MUD pairs. Notably, donor/recipient genomic mismatch on DPH1 was correlated with an increased risk of acute GvHD and LB-ADIR-1R mismatch on graft versus host direction was correlated with a better RFS with no increase of GvHD risk. Our work provides a simple, accurate and highly automatable method for mHAgs genotyping and suggest the role of mHAgs in addressing the immune reaction between donor and host.
Collapse
Affiliation(s)
- Federica Cattina
- Unit of Blood Disease and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, University of Brescia, ASST Spedali Civili of Brescia
| | - Simona Bernardi
- Unit of Blood Disease and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, University of Brescia, ASST Spedali Civili of Brescia
| | - Vilma Mantovani
- Center for Applied Biomedical Research (CRBA), St. Orsola-Malpighi University Hospital, Bologna
| | - Eleonora Toffoletti
- Division of Hematology and Bone Marrow Transplantation, Department of Experimental and Clinical Medical Sciences, Azienda Ospedaliero-Universitaria di Udine
| | - Alessandra Santoro
- Division of Hematology and Bone Marrow Transplantation, Ospedali Riuniti Villa Sofia-Cervello, Palermo
| | - Domenico Pastore
- Hematology and Bone Marrow Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari
| | | | - Giuseppe Console
- Hematology and Bone Marrow Transplant Unit, AO BMM, Reggio Calabria
| | - Giovanni Martinelli
- Department of Experimental, Diagnostic and Specialty Medicine, Hematology "L.eA. Seràgnoli", University of Bologna, Italy
| | - Michele Malagola
- Unit of Blood Disease and Stem Cell Transplantation, Department of Clinical and Experimental Sciences, University of Brescia, ASST Spedali Civili of Brescia
| |
Collapse
|
5
|
Genome-wide surveillance of mismatched alleles for graft-versus-host disease in stem cell transplantation. Blood 2015; 126:2752-63. [PMID: 26432889 DOI: 10.1182/blood-2015-03-630707] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 09/09/2015] [Indexed: 02/06/2023] Open
Abstract
Acute graft-versus-host disease (aGVHD) represents one of the major complications in allogeneic stem cell transplantation and is primarily caused by genetic disparity between the donor and recipient. In HLA-matched transplants, the disparity is thought to be determined by loci encoding minor histocompatibility antigens (minor H antigens), which are presented by specific HLA molecules. We performed a genome-wide association study (GWAS) to identify minor H antigen loci associated with aGVHD. A total of 500 568 single nucleotide polymorphisms (SNPs) were genotyped for donors and recipients from 1589 unrelated bone marrow transplants matched for HLA-A, -B, -C, -DRB1, and -DQB1, followed by the imputation of unobserved SNPs. We interrogated SNPs whose disparity between the donor and recipient was significantly associated with aGVHD development. Without assuming HLA unrestriction, we successfully captured a known association between HLA-DPB1 disparity (P = 4.50 × 10(-9)) and grade II-IV aGVHD development, providing proof of concept for the GWAS design aimed at discovering genetic disparity associated with aGVHD. In HLA-restricted analyses, whereby association tests were confined to major subgroups sharing common HLA alleles to identify putative minor H antigen loci, we identified 3 novel loci significantly associated with grade III-IV aGVHD. Among these, rs17473423 (P = 1.20 × 10(-11)) at 12p12.1 within the KRAS locus showed the most significant association in the subgroup, sharing HLA-DQB1*06:01. Our result suggested that a GWAS can be successfully applied to identify allele mismatch associated with aGVHD development, contributing to the understanding of the genetic basis of aGVHD.
Collapse
|
6
|
Abstract
H-Y antigens are a group of minor histocompatibility antigens encoded on the Y-chromosome with homologous H-X antigens on the X-chromosome. The disparate regions of the H-Y antigens are highly immunogenic and play an important role in understanding human alloimmunity. In this review, we investigate the history of H-Y antigen discovery along with their critical contributions in transplantation and pregnancy. In hematopoietic cell transplantation, male recipients with female donors who become seropositive for B-cell responses as H-Y antibodies following transplantation have increased rates of chronic graft-versus-host disease and decreased rates of relapse. Conversely, female patients who receive male kidney allografts are more likely than other gender combinations to develop H-Y antibodies and reject their allografts. Finally, in the setting of pregnancy, mothers who initially gave birth to boys are more likely to have subsequent pregnancy complications, including miscarriages, in association with H-Y antibody development. H-Y antigens continue to serve as a model for alloimmunity in new clinical scenarios. Our development of more sensitive antibody detection and next-generation DNA sequencing promises to further advance our understanding and better predict the clinical consequences of alloimmunity.
Collapse
Affiliation(s)
- Rakesh Popli
- Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Bita Sahaf
- Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Hideki Nakasone
- Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Joyce Yeuk Yu Lee
- Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - David B. Miklos
- Division of Blood and Marrow Transplantation, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| |
Collapse
|
7
|
Harkensee C, Oka A, Onizuka M, Middleton PG, Inoko H, Nakaoka H, Gennery AR, Ando K, Morishima Y. Microsatellite scanning of the immunogenome associates MAPK14 and ELTD1 with graft-versus-host disease in hematopoietic stem cell transplantation. Immunogenetics 2013; 65:417-27. [PMID: 23474535 DOI: 10.1007/s00251-013-0691-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Accepted: 02/16/2013] [Indexed: 12/16/2022]
Abstract
Graft-versus-host disease (GVHD) is the main complication after hematopoietic stem cell transplantation (HSCT). Evidence for non-HLA gene polymorphisms as a cause of GVHD lacks consistency, which is, in part, due to methodological issues of previous candidate gene association studies and small effect size of their results, demanding for larger scale and more robust approaches. Here, non-HLA gene polymorphisms were studied on a large population (922 HSCT pairs) from a homogeneous ethnic background with selection/correction for important clinical confounders. A methodology was applied exploiting the strength of confirmatory typing in an independent study cohort. Targeting an immunogenome of 2,909 genes, an approach of pooled DNA typing of 4,321 microsatellite (MS) markers in two independent screening steps and confirmation of associated markers by further individual genotyping on combined screening cohorts was used to identify genetic susceptibility loci for moderate to severe GVHD (grades 2-4). Ten MS loci (D5S424, D6S0035i, D1S0818i, DXS0151i, D17S0219i, DXS0629i, DXS0324i, D17S0271i, D6S0330i, and D1S1335i) passed the two pooled DNA typing steps and confirmation by individual sample genotyping; two of these (D1S0818i-ELTD1 and D6S0035i-MAPK14) remain associated following application of Bonferroni's correction and multivariate analysis. The MAPK14 locus was exemplarily explored by typing of haplotype single nucleotide polymorphisms (SNP) confirming this association. This study identified several new MS susceptibility loci for GVHD that warrant further investigation. Immunogenome scanning using MS markers is a useful method for the identification of non-HLA gene loci associating with HSCT outcomes.
Collapse
Affiliation(s)
- Christian Harkensee
- Division of Molecular Life Sciences, Tokai University School of Medicine, Isehara, Kanagawa, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Rowley SD, Friedman T, Korngold R. Hematopoietic stem cell transplantation for malignant diseases. Clin Immunol 2013. [DOI: 10.1016/b978-0-7234-3691-1.00097-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
9
|
Ogawa S, Matsubara A, Onizuka M, Kashiwase K, Sanada M, Kato M, Nannya Y, Akatsuka Y, Satake M, Takita J, Chiba S, Saji H, Maruya E, Inoko H, Morishima Y, Kodera Y, Takehiko S. Exploration of the genetic basis of GVHD by genetic association studies. Biol Blood Marrow Transplant 2009; 15:39-41. [PMID: 19147076 DOI: 10.1016/j.bbmt.2008.11.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Seishi Ogawa
- Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Tokyo, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Targeting minor histocompatibility antigens in graft versus tumor or graft versus leukemia responses. Trends Immunol 2008; 29:624-32. [PMID: 18952501 DOI: 10.1016/j.it.2008.09.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Revised: 08/24/2008] [Accepted: 09/01/2008] [Indexed: 01/25/2023]
Abstract
Allogeneic hematopoietic cell transplantation (alloHCT) represents the only curative therapy for several hematologic malignancies, and shows promise as a nascent treatment modality for select solid tumors. Although the original goal of alloHCT was hematopoietic reconstitution after sub-lethal chemoradiotherapy, recognition of a profound donor lymphocyte-mediated graft-versus-leukemia (GVL) or graft-versus-tumor (GVT) effect has shifted the paradigm from pre-transplant cytoreduction to tumor control via donor lymphocytes. In human leukocyte antigen (HLA)-compatible alloHCT, GVL and GVT reactions are induced primarily by donor T-cell recognition of minor histocompatibility antigens (mHAgs). Here we review the literature regarding mHAg-specific T cells in GVL and GVT reactions, and discuss the prospects of exploiting mHAgs as immunotherapeutic targets.
Collapse
|