scholarly journals The Distinct Contributions of Murine T Cell Receptor (TCR)γδ+ and TCRαβ+ T Cells to Different Stages of Chemically Induced Skin Cancer

2003 ◽  
Vol 198 (5) ◽  
pp. 747-755 ◽  
Author(s):  
Michael Girardi ◽  
Earl Glusac ◽  
Renata B. Filler ◽  
Scott J. Roberts ◽  
Iva Propperova ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Cell Receptor ◽  
Cell Receptor ◽  
Intraepithelial Lymphocytes ◽  
Tumor Promoter ◽  
Cell Type ◽  
Chemically Induced ◽  
Αβ T Cells

Epithelial tissues in which carcinomas develop often contain systemically derived T cell receptor (TCR)αβ+ cells and resident intraepithelial lymphocytes that are commonly enriched in TCRγδ+ cells. Recent studies have demonstrated that γδ cells protect the host against chemically induced cutaneous malignancy, but the role of αβ T cells has been enigmatic, with both protective and tumor-enhancing contributions being reported in different systems. This study aims to clarify the contributions of each T cell type to the regulation of squamous cell carcinoma induced in FVB mice by a two-stage regimen of 7,12-dimethylbenz[a]anthracene initiation followed by repetitive application of the tumor promoter 12-O-tetradecanoylphorbol 13-acetate. This protocol permits one to monitor the induction of papillomas and the progression of those papillomas to carcinomas. The results show that whereas γδ cells are strongly protective, the nonredundant contributions of αβ T cells to the host's protection against papillomas are more modest. Furthermore, at both high and low doses of carcinogens, αβ T cells can contribute to rather than inhibit the progression of papillomas to carcinomas. As is likely to be the case in humans, this study also shows that the contribution of T cells to tumor immunosurveillance is regulated by modifier genes.

scholarly journals Donor γδ T Lymphocytes Promote Allogeneic Engraftment Across the Major Histocompatibility Barrier in Mice

Blood ◽  
1997 ◽  
Vol 89 (3) ◽  
pp. 1100-1109 ◽  
Author(s):  
William R. Drobyski ◽  
David Majewski
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Cell Receptor ◽  
Γδ T Cells ◽  
Cell Receptor ◽  
Marrow Graft ◽  
Hematopoietic Reconstitution ◽  
Donor T Cells ◽  
Αβ T Cells

Abstract T cells that express the αβ T-cell receptor are thought to be the T-cell population primarily responsible for facilitating alloengraftment. The role of γδ+ T cells that comprise only a minority of mature T cells in promoting allogeneic engraftment, however, has not been extensively studied. The purpose of this study was to determine whether γδ T cells were capable of facilitating alloengraftment in murine recipients of major histocompatibility complex-mismatched marrow grafts. We developed a model where engraftment of C57BL/6 × 129/F2 (H-2b) marrow in sublethally irradiated (800 cGy) recipients (AKR/J, H-2k) is dependent on the presence of mature donor T cells in the marrow graft. In this model, donor T-cell engraftment was significantly augmented by as few as 1 × 105 αβ T cells. The role of γδ T cells was then investigated using transgenic donors (C57BL/6 × 129 background) in which a portion of the T-cell receptor–β chain gene was deleted by gene targeting so that these mice lack αβ T cells. Addition of 10 × 106 naive γδ T cells to T-cell depleted marrow grafts was required to significantly increase alloengraftment, although donor T cells averaged <50% of total splenic T cells. To determine whether higher doses of γδ T cells would improve donor engraftment and eradicate residual host T cells, γδ T cells were ex vivo expanded with a γδ T-cell–specific monoclonal antibody and interleukin-2 and then transplanted into irradiated recipients. Transplantation of ≥ 160 × 106 activated γδ T cells was necessary to consistently and significantly augment donor cell chimerism and enhance hematopoietic reconstitution when compared to control mice, but host T cells persisted in these chimeras. Addition of 2.5 × 104 mature αβ T cells, which alone were incapable of facilitating engraftment, to T-cell depleted marrow grafts containing 160 × 106 activated γδ T cells resulted in long-term (<100 day) complete donor engraftment, indicating that limiting numbers of αβ T cells were required in the marrow graft for the eradication of residual host T cells. Using serial weight curves and B-cell reconstitution as end points, clinically significant graft-versus-host disease was not observed in these chimeras under these experimental conditions. These data show that, whereas less potent than αβ T cells, γδ T cells are able to promote engraftment and enhance hematopoietic reconstitution in allogeneic marrow transplant recipients.

scholarly journals T cell receptor is required for differentiation but not maintenance of intestinal intraepithelial lymphocytes

2020 ◽  
Author(s):  
Angelina M. Bilate ◽  
Mariya London ◽  
Tiago B. R. Castro ◽  
Luka Mesin ◽  
Suppawat Kongthong ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Cell Receptor ◽  
Cell Receptor ◽  
Intraepithelial Lymphocytes ◽  
Intestinal Epithelial ◽  
Conditional Deletion ◽  
Tcr Repertoire ◽  
Regulatory Properties

SummaryThe gut epithelium is populated by intraepithelial lymphocytes (IELs), a heterogeneous T cell population with cytotoxic and regulatory properties. Migrating peripheral CD4+ T cells, including regulatory (Treg) and conventional T cells (Tconv), acquire an IEL (CD4-IEL) program upon arrival at the epithelium. However, the specific role of the T cell receptor (TCR) in this process remains unclear. Single-cell TCR repertoire and transcriptomic analysis of intraepithelial CD4+ T cells revealed different extents of clonal expansion and TCR overlap between cell states; fully differentiated CD4-IELs from Tregs or Tconvs were the least diverse. Conditional deletion of TCR on differentiating CD4+ T cells or of MHCII on intestinal epithelial cells prevented CD4-IEL differentiation. However, TCR ablation on developed CD4-IELs did not affect their accumulation. These results indicate that local recognition of a limited set of antigens is an essential signal for the differentiation and adaptation of T cells to the epithelium.

scholarly journals Role of Different T Cell Receptors in the Development of Pre–T Cells

1997 ◽  
Vol 185 (9) ◽  
pp. 1541-1548 ◽  
Author(s):  
Jan Buer ◽  
Iannis Aifantis ◽  
James P. DiSanto ◽  
Hans Joerg Fehling ◽  
Harald von Boehmer
Keyword(s):  
T Cells ◽  
Cell Death ◽  
T Cell ◽  
Programmed Cell Death ◽  
T Cell Receptor ◽  
T Cell Receptors ◽  
Cell Receptor ◽  
Double Function ◽  
Αβ T Cells

The development of pre–T cells with productive TCR-β rearrangements can be mediated by each the pre–T cell receptor (pre-TCR), the TCR-αβ as well as the TCR-γδ, albeit by distinct mechanisms. Although the TCR-γδ affects CD4−8− precursor cells irrespective of their rearrangement status by TCR-β mechanisms not involving TCR-β selection, both the preTCR and the TCR-αβ select only cells with productive TCR-β genes for expansion and maturation. The TCR-αβ appears to be much less effective than the pre-TCR because of the paucity of TCR-α proteins in TCR-β–positive precursors since an early expressed transgenic TCR-αβ can largely substitute for the pre-TCR. Thus, the TCR-αβ can assume a role not only in the rescue from programmed cell death of CD4+8+ but also of CD4−8− thymocytes. In evolution this double function of the TCR-αβ may have been responsible for the maturation of αβ T cells before the advent of the pre–TCR-α chain.

scholarly journals Ceramide Synthase 2 Null Mice Are Protected from Ovalbumin-Induced Asthma with Higher T Cell Receptor Signal Strength in CD4+ T Cells

2021 ◽  
Vol 22 (5) ◽  
pp. 2713
Author(s):  
Sun-Hye Shin ◽  
Kyung-Ah Cho ◽  
Hee-Soo Yoon ◽  
So-Yeon Kim ◽  
Hee-Yeon Kim ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Cell Receptor ◽  
Cd4 T Cells ◽  
Acyl Chain ◽  
Signal Strength ◽  
Cell Receptor ◽  
Ceramide Synthase ◽  
Asthmatic Patients

(1) Background: six mammalian ceramide synthases (CerS1–6) determine the acyl chain length of sphingolipids (SLs). Although ceramide levels are increased in murine allergic asthma models and in asthmatic patients, the precise role of SLs with specific chain lengths is still unclear. The role of CerS2, which mainly synthesizes C22–C24 ceramides, was investigated in immune responses elicited by airway inflammation using CerS2 null mice. (2) Methods: asthma was induced in wild type (WT) and CerS2 null mice with ovalbumin (OVA), and inflammatory cytokines and CD4 (cluster of differentiation 4)+ T helper (Th) cell profiles were analyzed. We also compared the functional capacity of CD4+ T cells isolated from WT and CerS2 null mice. (3) Results: CerS2 null mice exhibited milder symptoms and lower Th2 responses than WT mice after OVA exposure. CerS2 null CD4+ T cells showed impaired Th2 and increased Th17 responses with concomitant higher T cell receptor (TCR) signal strength after TCR stimulation. Notably, increased Th17 responses of CerS2 null CD4+ T cells appeared only in TCR-mediated, but not in TCR-independent, treatment. (4) Conclusions: altered Th2/Th17 immune response with higher TCR signal strength was observed in CerS2 null CD4+ T cells upon TCR stimulation. CerS2 and very-long chain SLs may be therapeutic targets for Th2-related diseases such as asthma.

An obligate role for T-cell receptor αβ+ T cells but not T-cell receptor γδ+ T cells, B cells, or CD40/CD40L interactions in a mouse model of atopic dermatitis

2001 ◽  
Vol 107 (2) ◽  
pp. 359-366 ◽  
Author(s):  
Amy L. Woodward ◽  
Jonathan M. Spergel ◽  
Harri Alenius ◽  
Emiko Mizoguchi ◽  
Atul K. Bhan ◽  
...  
Keyword(s):  
T Cells ◽  
Atopic Dermatitis ◽  
T Cell ◽  
B Cells ◽  
Mouse Model ◽  
T Cell Receptor ◽  
Γδ T Cells ◽  
Cell Receptor ◽  
Αβ T Cells

scholarly journals P06.01 αβ-T cells engineered to express γδ-T cell receptors can kill neuroblastoma organoids independent of MHC-I expression

2021 ◽  
Vol 9 (Suppl 1) ◽  
pp. A19.1-A19
Author(s):  
JGM Strijker ◽  
E Drent ◽  
JJF van der Hoek ◽  
R Pscheid ◽  
B Koopmans ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Cell Receptor ◽  
Healthy Donor ◽  
Transcriptional Profiling ◽  
Cell Receptor ◽  
Γδ T Cell ◽  
Mhc I ◽  
Part Time ◽  
Αβ T Cells

BackgroundCurrently ~50% of patients with the diagnosis of high-risk neuroblastoma will not survive due to relapsing or refractory disease. Recent innovations in immunotherapy for solid tumors are highly promising, but the low MHC-I expression of neuroblastoma represents a major challenge for T cell-mediated immunotherapy. Here, we propose a novel T cell-based immunotherapy approach for neuroblastoma, based on the use of TEG002, αβ-T cells engineered to express a defined γδ-T cell receptor, which are thought to recognize and kill target cells independent of MHC-I. In this pilot project we have tested the potential efficacy of TEG002 therapy as a novel treatment for neuroblastoma, with tumor organoids.Materials and MethodsEffector cells were created from healthy donor peripheral blood T cells. The TEG002 cells were engineered by transducing αβ-T cells with a defined Vγ9Vδ2-T cell receptor. Both the untransduced αβ-T cells and the endogenous Vγ9Vδ2-T cells from the same healthy donor were used as controls in all experiments. Activation and killing of TEG002 was tested in a co-culture setting with neuroblastoma organoids. Supernatant of the co-culture was collected at 24 hours for IFNγ ELISA to measure activation of TEG002. The dynamics of cytotoxicity were analyzed over time from 0 till 72 hours, using the live-cell imaging system IncuCyte from Sartorius®. Killing was quantified using a Caspase3/7 Green dye and the IncuCyte software. Transcriptional profiling of the neuroblastoma organoids was done by RNA sequencing and MHC-I expression of the neuroblastoma organoids was determined by flow cytometry.ResultsWe showed that 3 out of 6 neuroblastoma organoids could activate TEG002 as measured by IFNγ production. Transcriptional profiling of the neuroblastoma organoids showed that this effect correlates with an increased activity of processes involved in interferon signaling and extracellular matrix organization. Analysis of the dynamics of organoid killing by TEG002 over time confirmed that organoids which induced TEG002 activation were efficiently killed independently of their MHC-I expression. Of note, efficacy of TEG002 treatment was superior to donor-matched untransduced αβ-T cells or endogenous γδ-T cells.ConclusionsWe demonstrated that 50% of tested neuroblastoma organoids can effectively activate TEG002 and that killing of the organoids is independent of MHC-I expression. Hence, this pilot study identified TEG002 as a promising novel cellular product for immunotherapy for a subset of neuroblastoma tumors, warranting further investigations into its clinical application.Disclosure InformationJ.G.M. Strijker: None. E. Drent: A. Employment (full or part-time); Significant; Gadeta BV. J.J.F. van der Hoek: None. R. Pscheid: A. Employment (full or part-time); Significant; Gadeta BV. B. Koopmans: None. K. Ober: None. S.R. van Hooff: None. W.M. Kholosy: None. C. Coomans: A. Employment (full or part-time); Significant; Gadeta BV. A. Bisso: A. Employment (full or part-time); Significant; Gadeta BV. M. van Loenen: A. Employment (full or part-time); Significant; Gadeta BV. J.J. Molenaar: None. J. Wienke: None.

scholarly journals T Cell Receptor Specificity Is Critical for the Development of Epidermal γδ T Cells

2001 ◽  
Vol 194 (10) ◽  
pp. 1473-1483 ◽  
Author(s):  
Isabel Ferrero ◽  
Anne Wilson ◽  
Friedrich Beermann ◽  
Werner Held ◽  
H. Robson MacDonald
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Cell Receptor ◽  
Cell Biology ◽  
Γδ T Cells ◽  
Cell Receptor ◽  
Wild Type ◽  
Normal Numbers ◽  
T Cell Biology

A particular feature of γδ T cell biology is that cells expressing T cell receptor (TCR) using specific Vγ/Vδ segments are localized in distinct epithelial sites, e.g., in mouse epidermis nearly all γδ T cells express Vγ3/Vδ1. These cells, referred to as dendritic epidermal T cells (DETC) originate from fetal Vγ3+ thymocytes. The role of γδ TCR specificity in DETC's migration/localization to the skin has remained controversial. To address this issue we have generated transgenic (Tg) mice expressing a TCR δ chain (Vδ6.3-Dδ1-Dδ2-Jδ1-Cδ), which can pair with Vγ3 in fetal thymocytes but is not normally expressed by DETC. In wild-type (wt) Vδ6.3Tg mice DETC were present and virtually all of them express Vδ6.3. However, DETC were absent in TCR-δ−/− Vδ6.3Tg mice, despite the fact that Vδ6.3Tg γδ T cells were present in normal numbers in other lymphoid and nonlymphoid tissues. In wt Vδ6.3Tg mice, a high proportion of in-frame Vδ1 transcripts were found in DETC, suggesting that the expression of an endogenous TCR-δ (most probably Vδ1) was required for the development of Vδ6.3+ epidermal γδ T cells. Collectively our data demonstrate that TCR specificity is essential for the development of γδ T cells in the epidermis. Moreover, they show that the TCR-δ locus is not allelically excluded.

Developmental expression of the αIELβ7 integrin on T cell receptor γδ and T cell receptor αβ T cells

1994 ◽  
Vol 24 (3) ◽  
pp. 635-640 ◽  
Author(s):  
Leo Lefrançois ◽  
Terrence A. Barrett ◽  
Wendy L. Havran ◽  
Lynn Puddington
Keyword(s):  
T Cells ◽  
T Cell ◽  
T Cell Receptor ◽  
Cell Receptor ◽  
Developmental Expression ◽  
Αβ T Cells
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