1
|
Kandasamy K, Johana NB, Tan LG, Tan Y, Yeo JSL, Yusof NNB, Li Z, Koh J, Ginhoux F, Chan JKY, Choolani M, Mattar CNZ. Maternal dendritic cells influence fetal allograft response following murine in-utero hematopoietic stem cell transplantation. Stem Cell Res Ther 2023; 14:136. [PMID: 37226255 DOI: 10.1186/s13287-023-03366-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 05/05/2023] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND Intrauterine hematopoietic stem cell transplantation (IUT), potentially curative in congenital haematological disease, is often inhibited by deleterious immune responses to donor cells resulting in subtherapeutic donor cell chimerism (DCC). Microchimerism of maternal immune cells (MMc) trafficked into transplanted recipients across the placenta may directly influence donor-specific alloresponsiveness, limiting DCC. We hypothesized that dendritic cells (DC) among trafficked MMc influence the development of tolerogenic or immunogenic responses towards donor cells, and investigated if maternal DC-depletion reduced recipient alloresponsiveness and enhanced DCC. METHODS Using transgenic CD11c.DTR (C57BL/6) female mice enabled transient maternal DC-depletion with a single dose of diphtheria toxin (DT). CD11c.DTR females and BALB/c males were cross-mated, producing hybrid pups. IUT was performed at E14 following maternal DT administration 24 h prior. Bone marrow-derived mononuclear cells were transplanted, obtained from semi-allogenic BALB/c (paternal-derived; pIUT), C57BL/6 (maternal-derived; mIUT), or fully allogenic (aIUT) C3H donor mice. Recipient F1 pups were analyzed for DCC, while maternal and IUT-recipient immune cell profile and reactivity were examined via mixed lymphocyte reactivity functional assays. T- and B-cell receptor repertoire diversity in maternal and recipient cells were examined following donor cell exposure. RESULTS DCC was highest and MMc was lowest following pIUT. In contrast, aIUT recipients had the lowest DCC and the highest MMc. In groups that were not DC-depleted, maternal cells trafficked post-IUT displayed reduced TCR & BCR clonotype diversity, while clonotype diversity was restored when dams were DC-depleted. Additionally, recipients displayed increased expression of regulatory T-cells and immune-inhibitory proteins, with reduced proinflammatory cytokine and donor-specific antibody production. DC-depletion did not impact initial donor chimerism. Postnatal transplantation without immunosuppression of paternal donor cells did not increase DCC in pIUT recipients; however there were no donor-specific antibody production or immune cell changes. CONCLUSIONS Though maternal DC depletion did not improve DCC, we show for the first time that MMc influences donor-specific alloresponsiveness, possibly by expanding alloreactive clonotypes, and depleting maternal DC promotes and maintains acquired tolerance to donor cells independent of DCC, presenting a novel approach to enhancing donor cell tolerance following IUT. This may have value when planning repeat HSC transplantations to treat haemoglobinopathies.
Collapse
Affiliation(s)
- Karthikeyan Kandasamy
- Experimental Fetal Medicine Group, Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228, Singapore
| | | | - Lay Geok Tan
- Experimental Fetal Medicine Group, Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228, Singapore
- Department of Obstetrics and Gynaecology, National University Health System, National University Hospital, Singapore, Singapore
| | - Yvonne Tan
- Reproductive Medicine, KK Women's and Children's Hospital, Singapore, Singapore
| | - Julie Su Li Yeo
- Reproductive Medicine, KK Women's and Children's Hospital, Singapore, Singapore
| | - Nur Nazneen Binte Yusof
- Experimental Fetal Medicine Group, Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228, Singapore
| | - Zhihui Li
- Genome Research Informatics and Data Science Platform, Genome Institute of Singapore, Agency for Science Technology and Research, Singapore, Singapore
| | - Jiayu Koh
- Genome Research Informatics and Data Science Platform, Genome Institute of Singapore, Agency for Science Technology and Research, Singapore, Singapore
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, The Academia, Singapore, Singapore
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Jerry K Y Chan
- Experimental Fetal Medicine Group, Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228, Singapore
- Reproductive Medicine, KK Women's and Children's Hospital, Singapore, Singapore
- Cancer and Stem Cell Biology Program, Duke-NUS Graduate Medical School, Singapore, Singapore
| | - Mahesh Choolani
- Experimental Fetal Medicine Group, Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228, Singapore
- Department of Obstetrics and Gynaecology, National University Health System, National University Hospital, Singapore, Singapore
| | - Citra N Z Mattar
- Experimental Fetal Medicine Group, Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore, 119228, Singapore.
- Department of Obstetrics and Gynaecology, National University Health System, National University Hospital, Singapore, Singapore.
| |
Collapse
|
2
|
The comparative immunology of wild and laboratory mice, Mus musculus domesticus. Nat Commun 2017; 8:14811. [PMID: 28466840 PMCID: PMC5418598 DOI: 10.1038/ncomms14811] [Citation(s) in RCA: 184] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 01/31/2017] [Indexed: 01/01/2023] Open
Abstract
The laboratory mouse is the workhorse of immunology, used as a model of mammalian immune function, but how well immune responses of laboratory mice reflect those of free-living animals is unknown. Here we comprehensively characterize serological, cellular and functional immune parameters of wild mice and compare them with laboratory mice, finding that wild mouse cellular immune systems are, comparatively, in a highly activated (primed) state. Associations between immune parameters and infection suggest that high level pathogen exposure drives this activation. Moreover, wild mice have a population of highly activated myeloid cells not present in laboratory mice. By contrast, in vitro cytokine responses to pathogen-associated ligands are generally lower in cells from wild mice, probably reflecting the importance of maintaining immune homeostasis in the face of intense antigenic challenge in the wild. These data provide a comprehensive basis for validating (or not) laboratory mice as a useful and relevant immunological model system.
Collapse
|
3
|
Nash WT, Teoh J, Wei H, Gamache A, Brown MG. Know Thyself: NK-Cell Inhibitory Receptors Prompt Self-Tolerance, Education, and Viral Control. Front Immunol 2014; 5:175. [PMID: 24795719 PMCID: PMC3997006 DOI: 10.3389/fimmu.2014.00175] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 04/03/2014] [Indexed: 01/05/2023] Open
Abstract
Natural killer (NK) cells provide essential protection against viral infections. One of the defining features of this lymphocyte population is the expression of a wide array of variable cell surface stimulatory and inhibitory NK receptors (sNKR and iNKR, respectively). The iNKR are particularly important in terms of NK-cell education. As receptors specific for MHC class I (MHC I) molecules, they are responsible for self-tolerance and adjusting NK-cell reactivity based on the expression level of self-MHC I. The end result of this education is twofold: (1) inhibitory signaling tunes the functional capacity of the NK cell, endowing greater potency with greater education, and (2) education on self allows the NK cell to detect aberrations in MHC I expression, a common occurrence during many viral infections. Many studies have indicated an important role for iNKR and MHC I in disease, making these receptors attractive targets for manipulating NK-cell reactivity in the clinic. A greater understanding of iNKR and their ability to regulate NK cells will provide a basis for future attempts at translating their potential utility into benefits for human health.
Collapse
Affiliation(s)
- William T Nash
- Department of Microbiology, Immunology, and Cancer Biology, School of Medicine, University of Virginia , Charlottesville, VA , USA ; Beirne B. Carter Center for Immunology Research, School of Medicine, University of Virginia , Charlottesville, VA , USA
| | - Jeffrey Teoh
- Department of Microbiology, Immunology, and Cancer Biology, School of Medicine, University of Virginia , Charlottesville, VA , USA ; Beirne B. Carter Center for Immunology Research, School of Medicine, University of Virginia , Charlottesville, VA , USA
| | - Hairong Wei
- Beirne B. Carter Center for Immunology Research, School of Medicine, University of Virginia , Charlottesville, VA , USA ; Division of Nephrology, Department of Medicine, University of Virginia , Charlottesville, VA , USA
| | - Awndre Gamache
- Department of Microbiology, Immunology, and Cancer Biology, School of Medicine, University of Virginia , Charlottesville, VA , USA ; Beirne B. Carter Center for Immunology Research, School of Medicine, University of Virginia , Charlottesville, VA , USA
| | - Michael G Brown
- Department of Microbiology, Immunology, and Cancer Biology, School of Medicine, University of Virginia , Charlottesville, VA , USA ; Beirne B. Carter Center for Immunology Research, School of Medicine, University of Virginia , Charlottesville, VA , USA ; Division of Nephrology, Department of Medicine, University of Virginia , Charlottesville, VA , USA
| |
Collapse
|