Thymic Graft Transplantation
Thymic Graft Transplantation - Related Videos
05:47
Isolation and Transplantation of Different Aged Murine Thymic Grafts.
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Cited by 14 •
2015
This report provides a detailed description of transplanting murine thymi from different aged donor mice under the kidney capsule of immunodeficient mouse recipients. The goal of this approach is to model T cell development and thymic selection events in vivo.
05:06
Three-Dimensional Thymic Culture System to Generate iPSC-Derived Thymic Emigrants
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2025
This video demonstrates a protocol for generating functional antigen-specific T cells from iPSC-derived immature T cells using a three-dimensional thymic culture system. Co-culturing the iPSC-derived immature T cells with endogenous lymphocyte-depleted mice fetal thymic lobes resulted in successful maturation of the T cells to form CD8αβ+ MHC class I+ iPSC-derived thymic emigrants (iTEs).
08:12
Normothermic Ex Vivo Kidney Perfusion for the Preservation of Kidney Grafts prior to Transplantation
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Cited by 43 •
2015
The severe organ shortage has resulted in increased use of marginal kidney grafts for transplantation. This has triggered interest in alternative storage methods, since marginal grafts especially tolerate cold storage poorly. The technique of normothermic ex vivo kidney perfusion (NEVKP) represents a novel preservation method for kidney grafts prior to transplantation.
04:43
Orthotopic Porcine Kidney Transplantation: A Technique to Transplant Graft Kidney in Porcine Model
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2025
This video describes orthotopic kidney auto-transplantation in a porcine model. This surgical procedure involves the transplantation of an animal's kidney graft at its original anatomical location. The model is used to investigate new treatments for end-stage kidney diseases in humans.
08:56
Characterization of Thymic Settling Progenitors in the Mouse Embryo Using In Vivo and In Vitro Assays
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2015
This article describes in vivo and in vitro methodology to characterize the thymic settling progenitors by the analysis of the kinetics of generation, phenotype and numbers of their T cell progeny.
FAQs
Donor thymic epithelial cells do more than provide transplanted tissue: they create the local microenvironment that guides recipient hematopoietic precursors through T-cell maturation. This cellular support allows developing lymphocytes to undergo positive and negative selection. The resulting repertoire is shaped for useful immune recognition while limiting responses against self, which is essential for functional adaptive immunity.
Positive and negative selection perform complementary quality-control functions during T-cell development. Positive selection supports cells capable of participating in immune recognition, whereas negative selection removes cells that react inappropriately to self. Within the grafted thymic environment, these stages are central to producing a self-tolerant adaptive immune repertoire rather than simply increasing the number of developing T cells.
Restoration depends on developmental output, not simply on the presence of donor tissue. As recipient precursors mature within the graft, they can form a diverse T-cell repertoire. That diversity matters because cellular immunity must support adaptive responses across infectious challenges. The graft therefore addresses a failure of immune development and repertoire generation, not only a structural absence of thymic tissue.
At a high level, the intervention places functional thymic tissue into the patient, after which recipient hematopoietic precursors develop within the graft’s epithelial microenvironment. The relevant sequence is implantation followed by T-cell maturation, positive selection, and negative selection. This sequence explains why the therapeutic effect is linked to rebuilding immune development and cellular immunity through newly generated, self-tolerant T cells.
Congenital athymia is the key clinical setting identified for this approach. Severe forms associated with DiGeorge syndrome can leave patients profoundly susceptible to infection because thymic function is absent or severely impaired. In this context, grafting targets the developmental bottleneck underlying cellular immune deficiency, offering a way to rebuild T-cell production rather than treating infection susceptibility as an isolated symptom.
In immunology and infection research, thymic graft transplantation provides a way to examine how tissue microenvironments shape adaptive immunity. Its relevance extends beyond congenital athymia because the approach may inform future therapies for disorders of immune development. An important outcome is restoration of cellular immunity through development of a diverse, self-tolerant T-cell repertoire.