1
|
Chen WS, Haynes WA, Waitz R, Kamath K, Vega-Crespo A, Shrestha R, Zhang M, Foye A, Baselga Carretero I, Perez Garcilazo I, Zhang M, Zhao SG, Sjöström M, Quigley DA, Chou J, Beer TM, Rettig M, Gleave M, Evans CP, Lara P, Chi KN, Reiter RE, Alumkal JJ, Ashworth A, Aggarwal R, Small EJ, Daugherty PS, Ribas A, Oh DY, Shon JC, Feng FY. Autoantibody Landscape in Patients with Advanced Prostate Cancer. Clin Cancer Res 2020; 26:6204-6214. [PMID: 32967941 PMCID: PMC7710628 DOI: 10.1158/1078-0432.ccr-20-1966] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 08/03/2020] [Accepted: 09/16/2020] [Indexed: 12/16/2022]
Abstract
PURPOSE Autoantibody responses in cancer are of great interest, as they may be concordant with T-cell responses to cancer antigens or predictive of response to cancer immunotherapies. Thus, we sought to characterize the antibody landscape of metastatic castration-resistant prostate cancer (mCRPC). EXPERIMENTAL DESIGN Serum antibody epitope repertoire analysis (SERA) was performed on patient serum to identify tumor-specific neoepitopes. Somatic mutation-specific neoepitopes were investigated by associating serum epitope enrichment scores with whole-genome sequencing results from paired solid tumor metastasis biopsies and germline blood samples. A protein-based immunome-wide association study (PIWAS) was performed to identify significantly enriched epitopes, and candidate serum antibodies enriched in select patients were validated by ELISA profiling. A distinct cohort of patients with melanoma was evaluated to validate the top cancer-specific epitopes. RESULTS SERA was performed on 1,229 serum samples obtained from 72 men with mCRPC and 1,157 healthy control patients. Twenty-nine of 6,636 somatic mutations (0.44%) were associated with an antibody response specific to the mutated peptide. PIWAS analyses identified motifs in 11 proteins, including NY-ESO-1 and HERVK-113, as immunogenic in mCRPC, and ELISA confirmed serum antibody enrichment in candidate patients. Confirmatory PIWAS, Identifying Motifs Using Next-generation sequencing Experiments (IMUNE), and ELISA analyses performed on serum samples from 106 patients with melanoma similarly revealed enriched cancer-specific antibody responses to NY-ESO-1. CONCLUSIONS We present the first large-scale profiling of autoantibodies in advanced prostate cancer, utilizing a new antibody profiling approach to reveal novel cancer-specific antigens and epitopes. Our study recovers antigens of known importance and identifies novel tumor-specific epitopes of translational interest.
Collapse
Affiliation(s)
- William S Chen
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | | | | | | | - Agustin Vega-Crespo
- Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, California
| | - Raunak Shrestha
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | | | - Adam Foye
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
- Department of Medicine, University of California San Francisco, San Francisco, California
| | | | - Ivan Perez Garcilazo
- Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, California
| | - Meng Zhang
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | - Shuang G Zhao
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | - Martin Sjöström
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | - David A Quigley
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
- Department of Urology, University of California San Francisco, San Francisco, California
| | - Jonathan Chou
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
- Department of Medicine, University of California San Francisco, San Francisco, California
| | - Tomasz M Beer
- Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon
| | - Matthew Rettig
- Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, California
- VA Greater Los Angeles Healthcare System, Los Angeles, California
| | - Martin Gleave
- University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Primo Lara
- University of California Davis, Davis, California
| | - Kim N Chi
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Robert E Reiter
- Department of Urology, University of California Los Angeles, Los Angeles, California
| | - Joshi J Alumkal
- Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon
- Department of Hematology and Oncology, University of Michigan, Ann Arbor, Michigan
| | - Alan Ashworth
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
| | - Rahul Aggarwal
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
- Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, California
| | - Eric J Small
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
- Department of Medicine, University of California San Francisco, San Francisco, California
| | | | - Antoni Ribas
- Division of Hematology and Oncology, University of California Los Angeles, Los Angeles, California
| | - David Y Oh
- Department of Medicine, University of California San Francisco, San Francisco, California
| | | | - Felix Y Feng
- Department of Radiation Oncology, University of California San Francisco, San Francisco, California.
- Helen Diller Family Comprehensive Cancer Center, University of California San Francisco, San Francisco, California
- Department of Urology, University of California San Francisco, San Francisco, California
| |
Collapse
|
2
|
Kuppers DA, Schmitt TM, Hwang HC, Samraj L, Clurman BE, Fero ML. The miR-106a~363 Xpcl1 miRNA cluster induces murine T cell lymphoma despite transcriptional activation of the p27 Kip1 cell cycle inhibitor. Oncotarget 2017; 8:50680-50691. [PMID: 28881594 PMCID: PMC5584189 DOI: 10.18632/oncotarget.16932] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 03/22/2017] [Indexed: 12/19/2022] Open
Abstract
The miR-106a~363 cluster encodes 6 miRNAs on the X-chromosome which are abundant in blood cells and overexpressed in a variety of malignancies. The constituent miRNA of miR-106a~363 have functional activities in vitro that are predicted to be both oncogenic and tumor suppressive, yet little is known about their physiological functions in vivo. Mature miR-106a~363 (Mirc2) miRNAs are processed from an intragenic, non-protein encoding gene referred to as Xpcl1 (or Kis2), situated at an X-chromosomal locus frequently targeted by retroviruses in murine lymphomas. The oncogenic potential of miR-106a~363 Xpcl1 has not been proven, nor its potential role in T cell development. We show that miR106a~363 levels normally drop at the CD4+/CD8+ double positive (DP) stage of thymocyte development. Forced expression of Xpcl1 at this stage impairs thymocyte maturation and induces T-cell lymphomas. Surprisingly, miR-106a~363 Xpcl1 also induces p27 transcription via Foxo3/4 transcription factors. As a haploinsufficient tumor suppressor, elevated p27 is expected to inhibit lymphomagenesis. Consistent with this, concurrent p27 Kip1 deletion dramatically accelerated lymphomagenesis, indicating that p27 is rate limiting for tumor development by Xpcl1. Whereas down-regulation of miR-106a~363 is important for normal T cell differentiation and for the prevention of lymphomas, eliminating p27 reveals Xpcl1's full oncogenic potential.
Collapse
Affiliation(s)
| | | | | | | | - Bruce E. Clurman
- Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | | |
Collapse
|
3
|
Zaenker P, Gray E, Ziman M. Autoantibody Production in Cancer—The Humoral Immune Response toward Autologous Antigens in Cancer Patients. Autoimmun Rev 2016; 15:477-83. [DOI: 10.1016/j.autrev.2016.01.017] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 01/23/2016] [Indexed: 12/21/2022]
|
4
|
SLAP deficiency increases TCR avidity leading to altered repertoire and negative selection of cognate antigen-specific CD8+ T cells. Immunol Res 2013; 55:116-24. [PMID: 22956467 DOI: 10.1007/s12026-012-8354-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
How T cell receptor (TCR) avidity influences CD8(+) T cell development and repertoire selection is not yet fully understood. To fill this gap, we utilized Src-like adaptor protein (SLAP)-deficient mice as a tool to increase TCR avidity on double positive (DP) thymocytes. We generated SLAP(-/-) mice with the transgenic MHC class I-restricted TCR (OT-1) and SLAP(-/-) Vβ5 mice, expressing only the β-chain of the TCR OT-1 transgene, to examine the effects of increased TCR surface levels on CD8(+) T cell development and repertoire selection. In comparing SLAP(-/-) OT-1 and Vβ5 mice with wild-type controls, we performed compositional analysis and assessed thymocyte signaling by measuring CD5 levels. In addition, we performed tetramer and compositional staining to measure affinity for the cognate antigen, ovalbumin (OVA) peptide, presented by MHC. Furthermore, we quantified differences in α-chain repertoire in SLAP(-/-) Vβ5 mice. We have found that SLAP(-/-) OT-1 mice have fewer CD8(+) thymocytes but have increased CD5 expression. SLAP(-/-) OT-1 mice have fewer DP thymocytes expressing Vα2, signifying increased endogenous α-chain rearrangement, and more non-OVA-specific CD8(+) splenocytes upon tetramer staining. Our data demonstrate that SLAP(-/-) Vβ5 mice also have fewer OVA-specific cells and increased Vα2 usage in the peripheral Vβ5 CD8(+) T cells that were non-OVA-specific, demonstrating differences in α-chain repertoire. These studies provide direct evidence that increased TCR avidity in DP thymocytes enhances CD8(+) T cell negative selection deleting thymocytes with specificity for cognate antigen, an antigen the mature T cells may never encounter. Collectively, these studies provide new insights into how TCR avidity during CD8(+) T cell development influences repertoire selection.
Collapse
|
5
|
Nayak JL, Sant AJ. Loss in CD4 T-cell responses to multiple epitopes in influenza due to expression of one additional MHC class II molecule in the host. Immunology 2012; 136:425-36. [PMID: 22747522 DOI: 10.1111/j.1365-2567.2012.03599.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
An understanding of factors controlling CD4 T-cell immunodominance is needed to pursue CD4 T-cell epitope-driven vaccine design, yet our understanding of this in humans is limited by the complexity of potential MHC class II molecule expression. In the studies described here, we took advantage of genetically restricted, well-defined mouse strains to better understand the effect of increasing MHC class II molecule diversity on the CD4 T-cell repertoire and the resulting anti-influenza immunodominance hierarchy. Interferon-γ ELISPOT assays were implemented to directly quantify CD4 T-cell responses to I-A(b) and I-A(s) restricted peptide epitopes following primary influenza virus infection in parental and F(1) hybrid strains. We found striking and asymmetric declines in the magnitude of many peptide-specific responses in F(1) animals. These declines could not be accounted for by the lower surface density of MHC class II on the cell or by antigen-presenting cells failing to stimulate T cells with lower avidity T-cell receptors. Given the large diversity of MHC class II expressed in humans, these findings have important implications for the rational design of peptide-based vaccines that are based on the premise that CD4 T-cell epitope specificity can be predicted by a simple cataloguing of an individual's MHC class II genotype.
Collapse
Affiliation(s)
- Jennifer L Nayak
- Department of Pediatrics, University of Rochester Medical Center, Rochester, NY 14642, USA.
| | | |
Collapse
|
6
|
Day EB, Charlton KL, La Gruta NL, Doherty PC, Turner SJ. Effect of MHC class I diversification on influenza epitope-specific CD8+ T cell precursor frequency and subsequent effector function. THE JOURNAL OF IMMUNOLOGY 2011; 186:6319-28. [PMID: 21536802 DOI: 10.4049/jimmunol.1000883] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Earlier studies of influenza-specific CD8(+) T cell immunodominance hierarchies indicated that expression of the H2K(k) MHC class I allele greatly diminishes responses to the H2D(b)-restriced D(b)PA(224) epitope (acid polymerase, residues 224-233 complexed with H2D(b)). The results suggested that the presence of H2K(k) during thymic differentiation led to the deletion of a prominent Vβ7(+) subset of D(b)PA(224)-specific TCRs. The more recent definition of D(b)PA(224)-specific TCR CDR3β repertoires in H2(b) mice provides a new baseline for looking again at this possible H2K(k) effect on D(b)PA(224)-specific TCR selection. We found that immune responses to several H2D(b)- and H2K(b)-restricted influenza epitopes were indeed diminished in H2(bxk) F(1) versus homozygous mice. In the case of D(b)PA(224), lower numbers of naive precursors were part of the explanation, though a similar decrease in those specific for the D(b)NP(366) epitope did not affect response magnitude. Changes in precursor frequency were not associated with any major loss of TCR diversity and could not fully account for the diminished D(b)PA(224)-specific response. Further functional and phenotypic characterization of influenza-specific CD8(+) T cells suggested that the expansion and differentiation of the D(b)PA(224)-specific set is impaired in the H2(bxk) F(1) environment. Thus, the D(b)PA(224) response in H2(bxk) F(1) mice is modulated by factors that affect the generation of naive epitope-specific precursors and the expansion and differentiation of these T cells during infection, rather than clonal deletion of a prominent Vβ7(+) subset. Such findings illustrate the difficulties of predicting and defining the effects of MHC class I diversification on epitope-specific responses.
Collapse
Affiliation(s)
- E Bridie Day
- Department of Microbiology and Immunology, University of Melbourne, Parkville, Victoria 3010, Australia
| | | | | | | | | |
Collapse
|
7
|
Palmer E, Naeher D. Affinity threshold for thymic selection through a T-cell receptor–co-receptor zipper. Nat Rev Immunol 2009; 9:207-13. [DOI: 10.1038/nri2469] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
8
|
Koelsch U, Schraven B, Simeoni L. SIT and TRIM determine T cell fate in the thymus. THE JOURNAL OF IMMUNOLOGY 2009; 181:5930-9. [PMID: 18941181 DOI: 10.4049/jimmunol.181.9.5930] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Thymic selection is a tightly regulated developmental process essential for establishing central tolerance. The intensity of TCR-mediated signaling is a key factor for determining cell fate in the thymus. It is widely accepted that low-intensity signals result in positive selection, whereas high-intensity signals induce negative selection. Transmembrane adaptor proteins have been demonstrated to be important regulators of T cell activation. However, little is known about their role during T cell development. Herein, we show that SIT (SHP2 Src homology domain containing tyrosine phosphatase 2-interacting transmembrane adaptor protein) and TRIM (TCR-interacting molecule), two structurally related transmembrane adaptors, cooperatively regulate TCR signaling potential, thereby influencing the outcome of thymic selection. Indeed, loss of both SIT and TRIM resulted in the up-regulation of CD5, CD69, and TCRbeta, strong MAPK activation, and, consequently, enhanced positive selection. Moreover, by crossing SIT/TRIM double-deficient mice onto transgenic mice bearing TCRs with different avidity/affinity, we found profound alterations in T cell development. Indeed, in female HY TCR transgenic mice, positive selection was completely converted into negative selection resulting in small thymi devoided of double-positive thymocytes. More strikingly, in a nonselecting background, SIT/TRIM double-deficient single-positive T cells developed, were functional, and populated the periphery. In summary, we demonstrated that SIT and TRIM regulate cell fate of developing thymocytes, thus identifying them as essential regulators of central tolerance.
Collapse
Affiliation(s)
- Uwe Koelsch
- Institute of Molecular and Clinical Immunology, Otto-von-Guericke University, Magdeburg, Germany
| | | | | |
Collapse
|
9
|
Komaniwa S, Hayashi H, Kawamoto H, Sato SB, Ikawa T, Katsura Y, Udaka K. Lipid-mediated presentation of MHC class II molecules guides thymocytes to the CD4 lineage. Eur J Immunol 2008; 39:96-112. [DOI: 10.1002/eji.200838796] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
10
|
Furmanski AL, Ferreira C, Bartok I, Dimakou S, Rice J, Stevenson FK, Millrain MM, Simpson E, Dyson J. Public T Cell Receptor β-Chains Are Not Advantaged during Positive Selection. THE JOURNAL OF IMMUNOLOGY 2008; 180:1029-39. [DOI: 10.4049/jimmunol.180.2.1029] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
11
|
Clements JL, John SA, Garrett-Sinha LA. Impaired Generation of CD8+ Thymocytes in Ets-1-Deficient Mice. THE JOURNAL OF IMMUNOLOGY 2006; 177:905-12. [PMID: 16818745 DOI: 10.4049/jimmunol.177.2.905] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The Ets family of transcription factors function as key regulators of multiple aspects of immune cell development and function. To date, Ets-1 has been implicated in regulating early stages of thymic maturation and lymphocyte function and homeostasis. This report describes a novel role for Ets-1 in supporting later stages of thymic selection, in that positive selection of MHC class I-restricted CD4+CD8+ double-positive thymocytes is markedly inhibited in mice expressing a hypomorphic allele of Ets-1. This effect is thymocyte intrinsic, as Ets-1 mutant thymocytes fail to efficiently generate CD8+ single-positive thymocytes in mixed bone marrow chimeric backgrounds. Although peripheral CD8+ T cells are present in Ets-1 mutant mice, both CD4+ and CD8+ subsets contain an elevated proportion of cells with an effector memory (CD62L-CD44+) phenotype. In addition, while thymic expression of Thy1 is relatively normal, peripheral T cells isolated from Ets-1 mutant mice display a striking loss of Thy1 expression. These data identify Ets-1 as a key transcription factor regulating thymocyte positive selection and lineage commitment of MHC class I-restricted thymocytes.
Collapse
Affiliation(s)
- James L Clements
- Department of Immunology, Roswell Park Cancer Institute, Elm & Carlton Streets, Buffalo, NY 14263, USA.
| | | | | |
Collapse
|
12
|
Eshima K, Suzuki H, Shinohara N. Cross-positive selection of thymocytes expressing a single TCR by multiple major histocompatibility complex molecules of both classes: implications for CD4+ versus CD8+ lineage commitment. THE JOURNAL OF IMMUNOLOGY 2006; 176:1628-36. [PMID: 16424192 DOI: 10.4049/jimmunol.176.3.1628] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This study has investigated the cross-reactivity upon thymic selection of thymocytes expressing transgenic TCR derived from a murine CD8+ CTL clone. The Idhigh+ cells in this transgenic mouse had been previously shown to mature through positive selection by class I MHC, Dq or Lq molecule. By investigating on various strains, we found that the transgenic TCR cross-reacts with three different MHCs, resulting in positive or negative selection. Interestingly, in the TCR-transgenic mice of H-2q background, mature Idhigh+ T cells appeared among both CD4+ and CD8+ subsets in periphery, even in the absence of RAG-2 gene. When examined on beta2-microglobulin-/- background, CD4+, but not CD8+, Idhigh+ T cells developed, suggesting that maturation of CD8+ and CD4+ Idhigh+ cells was MHC class I (Dq/Lq) and class II (I-Aq) dependent, respectively. These results indicated that this TCR-transgenic mouse of H-2q background contains both classes of selecting MHC ligands for the transgenic TCR simultaneously. Further genetic analyses altering the gene dosage and combinations of selecting MHCs suggested novel asymmetric effects of class I and class II MHC on the positive selection of thymocytes. Implications of these observations in CD4+/CD8+ lineage commitment are discussed.
Collapse
MESH Headings
- Animals
- CD4-Positive T-Lymphocytes/cytology
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- CD8-Positive T-Lymphocytes/cytology
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Cell Differentiation/genetics
- Cell Differentiation/immunology
- Cell Line
- Cell Lineage/genetics
- Cell Lineage/immunology
- DNA-Binding Proteins/deficiency
- DNA-Binding Proteins/genetics
- H-2 Antigens/immunology
- Haplotypes
- Histocompatibility Antigens Class I/immunology
- Histocompatibility Antigens Class II/immunology
- Mice
- Mice, Inbred C3H
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mice, Inbred NOD
- Mice, Knockout
- Mice, Transgenic
- Receptors, Antigen, T-Cell/biosynthesis
- Receptors, Antigen, T-Cell/genetics
- Thymus Gland/cytology
- Thymus Gland/immunology
- Thymus Gland/metabolism
Collapse
Affiliation(s)
- Koji Eshima
- Department of Immunology, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan
| | | | | |
Collapse
|
13
|
Lombardi G, Burzyn D, Mundiñano J, Berguer P, Bekinschtein P, Costa H, Castillo LF, Goldman A, Meiss R, Piazzon I, Nepomnaschy I. Cathepsin-L influences the expression of extracellular matrix in lymphoid organs and plays a role in the regulation of thymic output and of peripheral T cell number. THE JOURNAL OF IMMUNOLOGY 2005; 174:7022-32. [PMID: 15905545 DOI: 10.4049/jimmunol.174.11.7022] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Nackt mice, which are deficient in cathepsin-L (CTSL), show an early impairment during positive selection in the context of class II MHC molecules and as a consequence, the percentage and absolute number of CD4(+) thymocytes are significantly decreased. In this study, we show that lymph nodes from nackt mice are hypertrophied, showing normal absolute numbers of CD4(+) T cells and marked increases in the number of CD8(+) T lymphocytes. Basal proliferative levels are increased in the CD4(+) but not in the CD8(+) population. Lymph node T cells show increases in the expression of alpha(5), alpha(6), and beta(1) integrin chains. These alterations correlate with increases in the expression of extracellular matrix (ECM) components in lymph nodes. Interestingly, laminin, fibronectin, and collagen I and IV are markedly decreased in nackt thymus which shows an augmented output of CD8(+) cells. These results demonstrate that a mutation in the Ctsl gene influences the levels of ECM components in lymphoid organs, the thymic output, and the number of T cells in the periphery. They further raise the possibility that, by regulating the level of expression of ECM components in lymphoid organs, CTSL is able to broadly affect the immune system.
Collapse
Affiliation(s)
- Gabriela Lombardi
- Instituto de Leucemia Experimental (ILEX)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), División Medicina Experimental, Instituto de Investigaciones Hematológicas, Buenos Aires, Argentina
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Takahashi S, Kataoka H, Hara S, Yokosuka T, Takase K, Yamasaki S, Kobayashi W, Saito Y, Saito T. In vivo overexpression of CTLA-4 suppresses lymphoproliferative diseases and thymic negative selection. Eur J Immunol 2005; 35:399-407. [PMID: 15668914 DOI: 10.1002/eji.200324746] [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: 11/07/2022]
Abstract
Cytotoxic T lymphocyte antigen-4 (CTLA-4) induces major inhibitory signals for T cell activation. From analyses of TCR-transgenic (Tg) CTLA-4-deficient mice, it has been believed that CTLA-4 does not affect thymocyte development. To focus upon the in vivo function of CTLA-4 in thymocyte development from a different aspect, we have established Tg mice expressing either full-length CTLA-4 (FL-Tg) or a mutant CTLA-4 lacking the cytoplasmic region (truncated, TR-Tg), and analyzed thymocyte development. TR-T cells express much higher CTLA-4 on the cell surface than FL-T cells, in which most CTLA-4 was localized in intracellular vesicles. While CTLA-4-/- mice exhibit lymphoproliferative disease, neither of the Tg mice with CTLA-4-/- background developed the disorder. Although the development of thymocytes appeared normal in both Tg mice, in vivo depletion of double-positive thymocytes by injection of anti-CD3 Ab as well as the elimination of minor lymphocyte-stimulating antigen-reactive thymocytes were impaired in FL-Tg mice but not in TR-Tg mice. Functionally, cross-linking of CTLA-4 on thymocytes from FL-Tg mice, but not from TR-Tg mice, inhibited proliferation. These results reveal a potential role of CTLA-4, through its cytoplasmic domain, in the negative selection of thymocytes and in the prevention of lymphoproliferative disease.
Collapse
Affiliation(s)
- Shigekazu Takahashi
- Department of Molecular Genetics, Graduate School of Medicine, Chiba University, Chiba, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Kao H, Allen PM. An antagonist peptide mediates positive selection and CD4 lineage commitment of MHC class II-restricted T cells in the absence of CD4. ACTA ACUST UNITED AC 2005; 201:149-58. [PMID: 15630142 PMCID: PMC2212763 DOI: 10.1084/jem.20041574] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The CD4 coreceptor works together with the T cell receptor (TCR) to deliver signals to the developing thymocyte, yet its specific contribution to positive selection and CD4 lineage commitment remains unclear. To resolve this, we used N3.L2 TCR transgenic, RAG-, and CD4-deficient mice, which are severely impaired in positive selection, and asked whether altered peptide ligands can replace CD4 function in vivo. Remarkably, in the presence of antagonist ligands that normally deleted CD4+ T cells in wild-type mice, we induced positive selection of functional CD4 lineage T cells in mice deficient in CD4. We show that the kinetic threshold for positive and negative selection was lowered in the absence of CD4, with no evident skewing toward the CD8 lineage with weaker ligands. These results suggest that CD4 is dispensable as long as the affinity threshold for positive selection is sustained, and strongly argue that CD4 does not deliver a unique instructional signal for lineage commitment.
Collapse
Affiliation(s)
- Henry Kao
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | | |
Collapse
|
16
|
Bosselut R. CD4/CD8-lineage differentiation in the thymus: from nuclear effectors to membrane signals. Nat Rev Immunol 2004; 4:529-40. [PMID: 15229472 DOI: 10.1038/nri1392] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Rémy Bosselut
- Laboratory of Immune Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.
| |
Collapse
|
17
|
Nishida T, Matsuki Y, Ono T, Oguma T, Tsujimoto K, Sato M, Tadakuma T. The Novel Murine CD4+CD8+ Thymocyte Cell Line Exhibits Lineage Commitment into Both CD4+ and CD8+ T Cells by Altering the Intensity and the Duration of Anti-CD3 Stimulation In Vitro. THE JOURNAL OF IMMUNOLOGY 2004; 172:6634-41. [PMID: 15153478 DOI: 10.4049/jimmunol.172.11.6634] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A CD4(+)CD8(+) double-positive thymocyte cell line, 257-20-109 was established from BALB/c mice thymocytes and used to analyze the requirements to induce CD4 or CD8 single-positive (SP) T cells. CD4SP cells were induced from 257-20-109 cells by anti-CD3 stimulation in the presence of the FcR-positive macrophage cell line, P388D1. During stimulation, maturation events, such as the down-regulation of CD24 and the up-regulation of CD69, H-2D(d), CD5, and Bcl-2, were recognized. Furthermore, these CD4SP cells appeared to be functional because the cells produced IL-2 and IL-4 when activated with phorbol ester and calcium ionophore. In contrast, CD8SP cells could be induced by stimulation with fixed anti-CD3 after removal of stimulation. To investigate the extent of signals required for CD4SP and CD8SP, the cells stimulated under either condition for 2 days were sorted and transferred to different culture conditions. These results suggested that the fate of lineage commitment was determined within 2 days, and that CD4 lineage commitment required longer activation. Furthermore, the experiments with subclones of 257-20-109 demonstrated that the lower density of CD3 did not shift the cells from CD4SP to CD8SP, but only reduced the amount of CD4SP cells. In contrast, when the 257-20-109 cells were stimulated by the combination of fixed anti-CD3 and anti-CD28, the majority of the cells shifted to CD4SP, with an enhancement of extracellular signal-regulated kinase 1 phosphorylation. Our results indicate that the signals via TCR/CD3 alone shifted the double-positive cells to CD8SP cells, but the reinforced signals via TCR/CD3 and costimulator could commit the cells to CD4SP.
Collapse
Affiliation(s)
- Takashi Nishida
- Department of Parasitology and Immunology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | | | | | | | | | | | | |
Collapse
|
18
|
Perez de Castro I, Bivona TG, Philips MR, Pellicer A. Ras activation in Jurkat T cells following low-grade stimulation of the T-cell receptor is specific to N-Ras and occurs only on the Golgi apparatus. Mol Cell Biol 2004; 24:3485-96. [PMID: 15060167 PMCID: PMC381594 DOI: 10.1128/mcb.24.8.3485-3496.2004] [Citation(s) in RCA: 127] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Ras activation is critical for T-cell development and function, but the specific roles of the different Ras isoforms in T-lymphocyte function are poorly understood. We recently reported T-cell receptor (TCR) activation of ectopically expressed H-Ras on the the Golgi apparatus of T cells. Here we studied the isoform and subcellular compartment specificity of Ras signaling in Jurkat T cells. H-Ras was expressed at much lower levels than the other Ras isoforms in Jurkat and several other T-cell lines. Glutathione S-transferase-Ras-binding domain (RBD) pulldown assays revealed that, although high-grade TCR stimulation and phorbol ester activated both N-Ras and K-Ras, low-grade stimulation of the TCR resulted in specific activation of N-Ras. Surprisingly, whereas ectopically expressed H-Ras cocapped with the TCRs in lipid microdomains of the Jurkat plasma membrane, N-Ras did not. Live-cell imaging of Jurkat cells expressing green fluorescent protein-RBD, a fluorescent reporter of GTP-bound Ras, revealed that N-Ras activation occurs exclusively on the Golgi apparatus in a phospholipase Cgamma- and RasGRP1-dependent fashion. The specificity of N-Ras signaling downstream of low-grade TCR stimulation was dependent on the monoacylation of the hypervariable membrane targeting sequence. Our data show that, in contrast to fibroblasts stimulated with growth factors in which all three Ras isoforms become activated and signaling occurs at both the plasma membrane and Golgi apparatus, Golgi-associated N-Ras is the critical Ras isoform and intracellular pool for low-grade TCR signaling in Jurkat T cells.
Collapse
Affiliation(s)
- Ignacio Perez de Castro
- Department of Pathology and New York University Cancer Institute, New York, New York 10016, USA
| | | | | | | |
Collapse
|
19
|
Yamasaki S, Ishikawa E, Kohno M, Saito T. The quantity and duration of FcRγ signals determine mast cell degranulation and survival. Blood 2004; 103:3093-101. [PMID: 15070690 DOI: 10.1182/blood-2003-08-2944] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
AbstractImmunoglobulin E (IgE) bound to multivalent antigen (Ag) elicits mast cell degranulation but not survival; on the contrary, IgE in the absence of Ag (IgE(-Ag)) induces survival only but not degranulation. Although these distinct responses are mediated through the same receptor, FcϵRI, the molecular mechanism generating the divergence is largely unknown. We recently showed that the signals through FcRγ chain are essential for IgE(-Ag)–induced mast cell survival as well as IgE(+Ag)–induced degranulation. To determine whether the cellular output is regulated by the quantity of FcRγ signal, we expressed CD8/FcRγ chimeras (CD8/γ) in bone marrow–derived mast cells (BMMCs) from FcRγ-/- mice to manipulate the strength of FcRγ signals by anti-CD8 cross-linking. Cross-linking of CD8/γ induced mast cell survival and degranulation. Survival was induced by weaker stimulation than needed for degranulation in terms of anti-CD8 concentration and the valency of chimera. However, sustained extracellular signal-regulated kinase (Erk) activation seems to regulate survival even when the activation signal was strong enough to elicit degranulation. Generation of sustained Erk activation by active mitogen-activated protein kinase kinase (MEK) induced BMMC survival. These results suggest that the duration and the magnitude of FcRγ signals may determine mast cell survival and degranulation, respectively. (Blood. 2004;103:3093-3101)
Collapse
Affiliation(s)
- Sho Yamasaki
- Department of Molecular Genetics (H1), Graduate School of Medicine, Chiba University, Chiba, Japan
| | | | | | | |
Collapse
|
20
|
Aliahmad P, O'Flaherty E, Han P, Goularte OD, Wilkinson B, Satake M, Molkentin JD, Kaye J. TOX provides a link between calcineurin activation and CD8 lineage commitment. ACTA ACUST UNITED AC 2004; 199:1089-99. [PMID: 15078895 PMCID: PMC2211890 DOI: 10.1084/jem.20040051] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
T cell development is dependent on the integration of multiple signaling pathways, although few links between signaling cascades and downstream nuclear factors that play a role in thymocyte differentiation have been identified. We show here that expression of the HMG box protein TOX is sufficient to induce changes in coreceptor gene expression associated with β-selection, including CD8 gene demethylation. TOX expression is also sufficient to initiate positive selection to the CD8 lineage in the absence of MHC–TCR interactions. TOX-mediated positive selection is associated with up-regulation of Runx3, implicating CD4 silencing in the process. Interestingly, a strong T cell receptor–mediated signal can modify this cell fate. We further demonstrate that up-regulation of TOX in double positive thymocytes is calcineurin dependent, linking this critical signaling pathway to nuclear changes during positive selection.
Collapse
Affiliation(s)
- Parinaz Aliahmad
- Department of Immunology IMM-8, The Scripps Research Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037, USA
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Schrum AG, Turka LA, Palmer E. Surface T-cell antigen receptor expression and availability for long-term antigenic signaling. Immunol Rev 2003; 196:7-24. [PMID: 14617194 DOI: 10.1046/j.1600-065x.2003.00083.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
It is important to understand how T-cell antigen receptor (TCR) engagement and signaling are regulated throughout an immune response. This review examines the dynamics of surface TCR expression and signaling capacity during thymic and effector T-cell development. Although the TCR can undergo vast changes in surface expression, T cells remain capable of sustaining TCR engagement for long periods of time. This may be achieved by a combination of mechanisms that involve (a) controlling the quantity of surface TCR available for ligand interaction and (b) controlling the quality of surface TCR expression during T-cell activation. TCR signaling itself appears to be one of the main quantitative modulators of surface TCR expression, and it can cause both downregulation and upregulation at different times of T-cell activation. Recent studies indicate that the degree of upregulation is tunable by the strength of antigenic stimulation. There is evidence that qualitatively distinct forms of the TCR exist, and their potential role in sustained antigenic signaling is also discussed. A goal of future studies will be to better characterize these modulations in surface TCR expression and to clarify their impact on the regulation of immune responses.
Collapse
Affiliation(s)
- Adam G Schrum
- Laboratory of Transplantation Immunology and Nephrology, Department of Research, University Hospital-Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland.
| | | | | |
Collapse
|
22
|
Abstract
Cell-fate decisions are controlled typically by conserved receptors that interact with co-evolved ligands. Therefore, the lineage-specific differentiation of immature CD4+ CD8+ T cells into CD4+ or CD8+ mature T cells is unusual in that it is regulated by clonally expressed, somatically generated T-cell receptors (TCRs) of unpredictable fine specificity. Yet, each mature T cell generally retains expression of the co-receptor molecule (CD4 or CD8) that has an MHC-binding property that matches that of its TCR. Two models were proposed initially to explain this remarkable outcome--'instruction' of lineage choice by initial signalling events or 'selection' after a stochastic fate decision that limits further development to cells with coordinated TCR and co-receptor specificities. Aspects of both models now appear to be correct; mistake-prone instruction of lineage choice precedes a subsequent selection step that filters out most incorrect decisions.
Collapse
Affiliation(s)
- Ronald N Germain
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892-1892, USA.
| |
Collapse
|
23
|
Abstract
Using a TCRalpha chain knock-in mouse, we demonstrate that V-gene replacement can operate in the T cell receptor alpha locus. Functional TCRalpha chain transcripts generated by Valpha-gene replacement at the site of the Valpha-embedded heptamer were identified in splenic T cells. This finding shows that Valpha-gene replacement can likely be used to shape the peripheral T cell repertoire. The conservation of the embedded heptamer in most Valpha segments adds support to the notion that V-gene replacement is a mechanism maintained to diversify the immune system and that argues that it is common to B and T cells.
Collapse
Affiliation(s)
- R Golub
- Department of Immunology, University of Toronto, Toronto, Canada
| | | | | | | |
Collapse
|
24
|
Wilkinson B, Kaye J. Requirement for sustained MAPK signaling in both CD4 and CD8 lineage commitment: a threshold model. Cell Immunol 2001; 211:86-95. [PMID: 11591112 DOI: 10.1006/cimm.2001.1827] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Although there is general agreement that the RAS/MAPK signaling pathway is required for positive selection of CD4 T cells in the thymus, the role of this pathway in CD8 lineage commitment remains controversial. We show here that the differentiation of isolated cultured thymocytes to the CD8 as well as CD4 T cell lineage is sensitive to MEK inhibition and that both CD4 and CD8 thymocyte differentiation requires sustained MEK signaling. However, CD4 lineage commitment is promoted by a stronger stimulus for longer duration than required for CD8 lineage commitment. Interestingly, CD4 lineage commitment is not irreversibly set even after 10 h of signaling, well past early changes in gene expression. These findings are presented in the context of a model of lineage commitment in which a default pathway of CD8 lineage commitment is altered to CD4 commitment if the thymocyte achieves a threshold level of active MAPK within a certain time frame.
Collapse
Affiliation(s)
- B Wilkinson
- Department of Immunology, The Scripps Research Institute, La Jolla, California 92037, USA
| | | |
Collapse
|