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Silaeva YY, Grinenko TS, Vagida MS, Kalinina AA, Khromykh LM, Kazansky DB. Immune selection of tumor cells in TCR β-chain transgenic mice. J Immunotoxicol 2013; 11:393-9. [PMID: 24308870 DOI: 10.3109/1547691x.2013.861548] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The concept of immunological surveillance implies that immunogenic variants of tumor cells arising in the organism can be recognized by the immune system. Tumor progression is provided by somatic evolution of tumor cells under the pressure of the immune system. The loss of MHC Class I molecules on the surface of tumor cells is one of the most known outcomes of immune selection. This study developed a model of immune selection based on the immune response of TCR 1d1 single β-chain transgenic B10.D2(R101) (K(d)I(d)D(b)) mice to allogeneic EL4 (H-2(b)) thymoma cells. In wild-type B10.D2(R101) mice, immunization with EL4 cells induced a vigorous CTL response targeted to the H-2K(b) molecule and results in full rejection of the tumor cells. In contrast, transgenic mice developed a compromised proliferative response in mixed-lymphocyte response assays and were unable to reject transplanted allogeneic EL4 cells. During the immune response to EL4 cells, CD8(+) T-lymphocytes with endogenous β-chains accumulated predominantly in the spleen of transgenic mice and only a small part of the T-lymphocytes expressing transgenic β-chains became CD8(+)CD44(+)CD62L(-) effectors. Then, instead of a full elimination of tumor cells as in wild-type mice, a reproducible prolonged equilibrium phase and subsequent escape was observed in transgenic mice that resulted in death of 90% of the mice in 40-60 days after grafting. Prolonged exposure of tumor cells to the pressure of the immune system in transgenic mice in vivo resulted in a stable loss of H-2K(b) molecules on the EL4 cell surface. Genetic manipulation of the T-lymphocyte repertoire was sufficient to reproduce the classic pattern of interactions between tumor cells and the immune system, usually observed in reliable syngeneic models of anti-tumor immunity. This newly-developed model could be used in further studies of immunoregulatory circuits common for transplantational and anti-tumor immune responses.
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Affiliation(s)
- Yulia Yu Silaeva
- Laboratory of Regulatory Mechanisms in Immunity, Carcinogenesis Institute, N. N. Blokhin Cancer Research Center , RAMS, Moscow , Russia
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2
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Silaeva YY, Kalinina AA, Vagida MS, Khromykh LM, Deikin AV, Ermolkevich TG, Sadchikova ER, Goldman IL, Kazansky DB. Decrease in pool of T lymphocytes with surface phenotypes of effector and central memory cells under influence of TCR transgenic β-chain expression. BIOCHEMISTRY (MOSCOW) 2013; 78:549-59. [PMID: 23848158 DOI: 10.1134/s0006297913050143] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Peripheral T lymphocytes can be subdivided into naïve and antigen-experienced T cells. The latter, in turn, are represented by effector and central memory cells that are identified by different profiles of activation markers expression, such as CD44 and CD62L in mice. These markers determine different traffic of T lymphocytes in the organism, but hardly reproduce real antigenic experience of a T lymphocyte. Mechanisms of homeostasis maintenance of T lymphocytes with different activation phenotypes remain largely unknown. To investigate impact of T cell receptor (TCR) transgenic chains on formation of T lymphocytes, their peripheral survival and activation surface phenotypes, we have generated the transgenic mouse strain expressing transgenic β-chain of TCR 1D1 (belonging to the Vβ6 family) on the genetic background B10.D2(R101). Intrathymic development of T cells in these transgenic mice is not impaired. The repertoire of peripheral T lymphocytes in these mice contains 70-80% of T cells expressing transgenic β-chain and 20-30% of T cells expressing endogenous β-chains. The ratio of peripheral CD4⁺CD8⁻ and CD4⁻CD8⁺ T lymphocytes remained unchanged in the transgenic animals, but the percent of T lymphocytes with the "naïve" phenotype CD44⁻CD62L⁺ was significantly increased, whereas the levels of effector memory CD44⁺CD62L⁻ and central memory CD44⁺CD62L⁺ T lymphocytes were markedly decreased in both subpopulations. On the contrary, T lymphocytes expressing endogenous β-chains had surface phenotype of activated T cells CD44⁺. Thus, for the first time we have shown that the pool of T lymphocytes with different activation phenotypes depends on the structure of T cell receptors.
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Affiliation(s)
- Yu Yu Silaeva
- Blokhin Cancer Research Center, Russian Academy of Medical Sciences, Kashirskoe Shosse 24, 115478 Moscow, Russia
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3
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Yang-Iott KS, Carpenter AC, Rowh MAW, Steinel N, Brady BL, Hochedlinger K, Jaenisch R, Bassing CH. TCR beta feedback signals inhibit the coupling of recombinationally accessible V beta 14 segments with DJ beta complexes. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2010; 184:1369-78. [PMID: 20042591 PMCID: PMC2873682 DOI: 10.4049/jimmunol.0900723] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ag receptor allelic exclusion is thought to occur through monoallelic initiation and subsequent feedback inhibition of recombinational accessibility. However, our previous analysis of mice containing a V(D)J recombination reporter inserted into Vbeta14 (Vbeta14(Rep)) indicated that Vbeta14 chromatin accessibility is biallelic. To determine whether Vbeta14 recombinational accessibility is subject to feedback inhibition, we analyzed TCRbeta rearrangements in Vbeta14(Rep) mice containing a preassembled in-frame transgenic Vbeta8.2Dbeta1Jbeta1.1 or an endogenous Vbeta14Dbeta1Jbeta1.4 rearrangement on the homologous chromosome. Expression of either preassembled VbetaDJbetaC beta-chain accelerated thymocyte development because of enhanced cellular selection, demonstrating that the rate-limiting step in early alphabeta T cell development is the assembly of an in-frame VbetaDJbeta rearrangement. Expression of these preassembled VbetaDJbeta rearrangements inhibited endogenous Vbeta14-to-DJbeta rearrangements as expected. However, in contrast to results predicted by the accepted model of TCRbeta feedback inhibition, we found that expression of these preassembled TCR beta-chains did not downregulate recombinational accessibility of Vbeta14 chromatin. Our findings suggest that TCRbeta-mediated feedback inhibition of Vbeta14 rearrangements depends on inherent properties of Vbeta14, Dbeta, and Jbeta recombination signal sequences.
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MESH Headings
- Animals
- Antibody Diversity/genetics
- Cell Differentiation/genetics
- Cell Differentiation/immunology
- Chromatin/physiology
- Feedback, Physiological/physiology
- Gene Expression Regulation, Developmental/immunology
- Gene Rearrangement, T-Lymphocyte/immunology
- Genes, Reporter/immunology
- Germ-Line Mutation/immunology
- Immunoglobulin Joining Region/genetics
- Immunoglobulin Variable Region/genetics
- Loss of Heterozygosity/immunology
- Mice
- Mice, Transgenic
- Receptors, Antigen, T-Cell, alpha-beta/antagonists & inhibitors
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- Signal Transduction/genetics
- Signal Transduction/immunology
- T-Lymphocyte Subsets/cytology
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/metabolism
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Affiliation(s)
- Katherine S. Yang-Iott
- Department of Pathology and Laboratory Medicine, Center for Childhood Cancer Research, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Abramson Family Cancer Research Institute, Philadelphia, PA 19104
| | - Andrea C. Carpenter
- Immunology Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Department of Pathology and Laboratory Medicine, Center for Childhood Cancer Research, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Abramson Family Cancer Research Institute, Philadelphia, PA 19104
| | - Marta A. W. Rowh
- Immunology Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Department of Pathology and Laboratory Medicine, Center for Childhood Cancer Research, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Abramson Family Cancer Research Institute, Philadelphia, PA 19104
| | - Natalie Steinel
- Immunology Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Department of Pathology and Laboratory Medicine, Center for Childhood Cancer Research, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Abramson Family Cancer Research Institute, Philadelphia, PA 19104
| | - Brenna L. Brady
- Immunology Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Department of Pathology and Laboratory Medicine, Center for Childhood Cancer Research, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Abramson Family Cancer Research Institute, Philadelphia, PA 19104
| | - Konrad Hochedlinger
- Department of Medicine, Harvard Medical School, Massachusetts General Hospital, Cancer Center and Center for Regenerative Medicine, Boston, MA 02114
| | - Rudolf Jaenisch
- Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Cambridge, MA 02142
| | - Craig H. Bassing
- Immunology Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
- Department of Pathology and Laboratory Medicine, Center for Childhood Cancer Research, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Abramson Family Cancer Research Institute, Philadelphia, PA 19104
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Carpenter AC, Yang-Iott KS, Chao LH, Nuskey B, Whitlow S, Alt FW, Bassing CH. Assembled DJ beta complexes influence TCR beta chain selection and peripheral V beta repertoire. THE JOURNAL OF IMMUNOLOGY 2009; 182:5586-95. [PMID: 19380806 DOI: 10.4049/jimmunol.0803270] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
TCRbeta chain repertoire of peripheral alphabeta T cells is generated through the stepwise assembly and subsequent selection of TCRbeta V region exons during thymocyte development. To evaluate the influence of a two-step recombination process on Vbeta rearrangement and selection, we generated mice with a preassembled Dbeta1Jbeta1.1 complex on the Jbeta1(omega) allele, an endogenous TCRbeta allele that lacks the Dbeta2-Jbeta2 cluster, creating the Jbeta1(DJbeta) allele. As compared with Jbeta1(omega/omega) mice, both Jbeta1(DJbeta/omega) and Jbeta1(DJbeta/DJbeta) mice exhibited grossly normal thymocyte development and TCRbeta allelic exclusion. In addition, Vbeta rearrangements on Jbeta1(DJbeta) and Jbeta1(omega) alleles were similarly regulated by TCRbeta-mediated feedback regulation. However, in-frame VbetaDJbeta rearrangements were present at a higher level on the Jbeta1(DJbeta) alleles of Jbeta1(DJbeta/omega) alphabeta T cell hybridomas, as compared with on the Jbeta1(omega) alleles. This bias was most likely due to both an increased frequency of Vbeta-to-DJbeta rearrangements on Jbeta1(DJbeta) alleles and a preferential selection of cells with in-frame VbetaDJbeta exons assembled on Jbeta1(DJbeta) alleles during the development of Jbeta1(DJbeta/omega) alphabeta T cells. Consistent with the differential selection of in-frame VbetaDJbeta rearrangements on Jbeta1(DJbeta) alleles, the Vbeta repertoire of alphabeta T cells was significantly altered during alphabeta TCR selection in Jbeta1(DJbeta/omega) and Jbeta1(DJbeta/DJbeta) mice, as compared with in Jbeta1(omega/omega) mice. Our data indicate that the diversity of DJbeta complexes assembled during thymocyte development influences TCRbeta chain selection and peripheral Vbeta repertoire.
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Affiliation(s)
- Andrea C Carpenter
- Immunology Graduate Group, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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5
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Busse CE, Krotkova A, Eichmann K. The TCRbeta enhancer is dispensable for the expression of rearranged TCRbeta genes in thymic DN2/DN3 populations but not at later stages. THE JOURNAL OF IMMUNOLOGY 2005; 175:3067-74. [PMID: 16116195 DOI: 10.4049/jimmunol.175.5.3067] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The Ebeta enhancer has been shown to be dispensable for germline transcription of nonrearranged TCRbeta segments but appears to be required for TCRbeta V to DJ rearrangement. Ebeta dependency of the subsequent expression of VDJ-rearranged TCRbeta genes in thymic subpopulations has so far not been analyzed. We generated transgenic mice, using a Vbeta8.2Dbeta1Jbeta1.3-rearranged TCRbeta bacterial artificial chromosome, which lacked Ebeta, and monitored transgene expression by flow cytometry using Vbeta-specific mAbs and an IRES-eGFP reporter. Transgene expression was found in double negative (DN)2 and DN3 but not at later stages of thymopoesis. There was no toxicity associated with the transgene given that apoptosis in DN3, DN4 was not increased, and the number of DN4 cells generated from DN3 cells in reaggregate thymic organ cultures was not diminished. The transgenic TCRbeta gave rise to a pre-TCR, as suggested by its ability to suppress endogenous TCRbeta rearrangement, to facilitate beta-selection on a TCRbeta-deficient background and to inhibit gammadelta T cell lineage development. The results suggest that the Vbeta8.2 promoter is sufficient to drive expression of rearranged TCRbeta VDJ genes Ebeta independently in DN2/DN3 but not at later stages.
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Affiliation(s)
- Christian E Busse
- Department of Cellular Immunology, Max-Planck-Institute of Immunobiology, Freiburg, Germany
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6
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Krotkova A, Smith E, Nerz G, Falk I, Eichmann K. Delayed and restricted expression limits putative instructional opportunities of Vgamma1.1/Vgamma2 gammadelta TCR in alphabeta/gammadelta lineage choice in the thymus. THE JOURNAL OF IMMUNOLOGY 2004; 173:25-32. [PMID: 15210755 DOI: 10.4049/jimmunol.173.1.25] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Development of alphabeta and gammadelta T cells depends on productive rearrangement of the appropriate TCR genes and their subsequent expression as proteins. TCRbeta and TCRgammadelta proteins first appear in DN3 and DN4 thymocytes, respectively. So far, it is not clear whether this is due to a delayed expression of TCRgammadelta proteins or to a more rapid progression to DN4 of thymocytes expressing TCRgammadelta. The answer to this question bears on the distinction between instructive and stochastic models of alphabeta/gammadelta lineage decision. To study this question, we first monitored initial TCR protein expression in wild-type and TCR transgenic mice in reaggregate thymic organ cultures. A TCRbeta transgene was expressed in nearly all DN3 and DN4 cells, accelerated DN3 to DN4 transition, and strongly diminished the number of cells that express TCRgammadelta proteins. In contrast, TCRgammadelta transgenes were expressed only in a fraction of DN4 cells, did not accelerate DN3 to DN4 transition, and did not reduce the number of DN4 cells expressing TCRbeta proteins. The TCRbeta transgene partially inhibited endogenous TCRgamma rearrangements, whereas the TCRgammadelta transgenes did not inhibit endogenous TCRbeta rearrangements. Second, we analyzed frequencies of productive TCRbeta and TCRgammadelta V(D)J junctions in DN3 and DN4 subsets. Most importantly, frequencies of productive TCRgammadelta rearrangements (Vdelta5, Vgamma1.1, and Vgamma2) appeared unselected in DN3. The results suggest a late and restricted expression of the corresponding gammadeltaTCR, severely limiting their putative instructional opportunities in alphabeta/gammadelta divergence.
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MESH Headings
- Animals
- Cell Lineage
- Gene Rearrangement, T-Lymphocyte
- Genes, T-Cell Receptor beta
- Lymphocyte Activation
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Receptors, Antigen, T-Cell, alpha-beta/physiology
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/physiology
- T-Lymphocytes/physiology
- Thymus Gland/immunology
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Affiliation(s)
- Anna Krotkova
- Max-Planck-Institut für Immunbiologie, Stübeweg 541, 79108 Freiburg, Germany
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7
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Falk I, Nerz G, Haidl I, Krotkova A, Eichmann K. Immature thymocytes that fail to express TCRbeta and/or TCRgamma delta proteins die by apoptotic cell death in the CD44(-)CD25(-) (DN4) subset. Eur J Immunol 2001; 31:3308-17. [PMID: 11745348 DOI: 10.1002/1521-4141(200111)31:11<3308::aid-immu3308>3.0.co;2-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Pre-TCR/CD3 signals are essential for survival and maturation of (CD44(-)25(+)) DN3 thymocytes via the (CD44(-)25(-)) DN4 stage to CD4(+)CD8(+) (DP) cells, a process termed beta-selection. The exact developmental stages of apoptosis resulting from lack of pre-TCR/CD3 signals have so far not been determined. Here we analyzed apoptotic cell death in relation to expression of clonotypic TCR polypeptides and to cell cycle status in immature thymocyte subpopulations of wild type (wt) mice and of several strains of mice with compromised pre-TCR/CD3 signaling complexes. In wt mice or pre-TCR/CD3-deficient mice, apoptotic cells could not be detected among DN3 cells but accumulated in a subset of DN4 expressing CD69. Apoptotic CD69(+)DN4 cells were rare in wt mice and were found among DN4 cells that were negative or low for intracellular TCRbeta and negative for TCRgamma delta polypeptide chains. Apoptotic CD69(+)DN4 cells were abundant in pre-TCR/CD3 signaling-deficient mice in which most DN4 cells failed to express clonotypic TCR polypeptides. Survival of DN4 cells, but not maturation of DN3 cells to DN4, was found to depend on the expression of clonotypic TCR polypeptides in the same cell. The results suggest that thymocytes unsuccessful in alpha beta or in gamma delta lineage development die by apoptosis in the DN4 subset.
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MESH Headings
- Animals
- Antigens, CD/analysis
- Antigens, Differentiation, T-Lymphocyte/analysis
- Apoptosis
- Gene Rearrangement
- Genes, T-Cell Receptor beta
- Genes, T-Cell Receptor delta
- Genes, T-Cell Receptor gamma
- Hyaluronan Receptors/analysis
- Lectins, C-Type
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Receptors, Antigen, T-Cell, alpha-beta/physiology
- Receptors, Antigen, T-Cell, gamma-delta/physiology
- Receptors, Interleukin-2/analysis
- T-Lymphocyte Subsets/physiology
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Affiliation(s)
- I Falk
- Max-Planck-Institut für Immunbiologie, Freiburg, Germany
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8
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Baur N, Nerz G, Nil A, Eichmann K. Expression and selection of productively rearranged TCR beta VDJ genes are sequentially regulated by CD3 signaling in the development of NK1.1(+) alpha beta T cells. Int Immunol 2001; 13:1031-42. [PMID: 11470773 DOI: 10.1093/intimm/13.8.1031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The generation of thymic NK1.1(+)alpha beta T (NKT) cells involves positive selection of cells enriched for V(alpha)14/V(beta)8 TCR by CD1d MHC class I molecules. However, it has not been determined whether positive selection is preceded by pre-TCR-dependent beta selection. Here we studied NKT cell development in CD3 signaling-deficient mice (CD3 zeta/eta(-/-) and/or p56(lck-/-)) and TCR alpha-deficient mice. In contrast to wild-type mice, NK1.1(+) thymocytes in CD3 signaling-deficient mice are approximately 10-fold reduced in number, do not exhibit V(alpha)14-J(alpha)281 rearrangements and fail to express alpha beta TCR at the cell surface. However, they exhibit TCR beta VDJ rearrangements and pre-T alpha mRNA, suggesting that they contain pre-NKT cells. Strikingly, pre-NKT cells of CD3 zeta/Lck double-deficient mice fail to express TCR beta mRNA and protein. Whereas in wild-type NKT cells TCR beta VDJ junctions are selected for productive V(beta)8 and against productive V(beta)5 rearrangements, V(beta)8 and V(beta)5 rearrangements are non-selected in pre-NKT cells of CD3 signaling-deficient mice. Thus, pre-NKT cell development in CD3 signaling-deficient mice is blocked after rearrangement of TCR beta VDJ genes but before expression of TCR beta proteins. Most NKT cells of TCR alpha-deficient mice exhibit cell surface gamma delta TCR. In contrast to pre-NKT cells of CD3 signaling-deficient mice, approximately 25% of NKT cells of TCR alpha-deficient mice exhibit intracellular TCR beta polypeptide chains. Moreover, both V(beta)8 and V(beta)5 families are selected for in-frame VDJ joints in the TCR beta(+) NKT cell subset of TCR alpha-deficient mice. The data suggest that CD3 signals regulate initial TCR beta VDJ gene expression prior to beta selection in developing pre-NKT cells.
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MESH Headings
- Animals
- Flow Cytometry
- Gene Rearrangement, beta-Chain T-Cell Antigen Receptor
- Hyaluronan Receptors/metabolism
- Killer Cells, Natural/metabolism
- Mice
- Mice, Congenic
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Mutant Strains
- Mice, Transgenic
- RNA Precursors/metabolism
- Receptor-CD3 Complex, Antigen, T-Cell/biosynthesis
- Receptor-CD3 Complex, Antigen, T-Cell/deficiency
- Receptor-CD3 Complex, Antigen, T-Cell/physiology
- Receptors, Antigen, T-Cell, alpha-beta/biosynthesis
- Receptors, Antigen, T-Cell, alpha-beta/deficiency
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Signal Transduction/genetics
- Signal Transduction/immunology
- T-Lymphocyte Subsets/metabolism
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Affiliation(s)
- N Baur
- Max-Planck-Institut für Immunbiologie, Stübeweg 51, 79108 Freiburg, Germany
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9
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von Boehmer H, Aifantis I, Azogui O, Saint-Ruf C, Grassi F. The impact of pre-T-cell receptor signals on gene expression in developing T cells. COLD SPRING HARBOR SYMPOSIA ON QUANTITATIVE BIOLOGY 2001; 64:283-9. [PMID: 11232298 DOI: 10.1101/sqb.1999.64.283] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- H von Boehmer
- Institut National de la Santé et de la Recherche Médicale (INSERM), U373 Hôpital Necker-Enfants Malades, F-75730 Paris, France
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10
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Baur N, Eichmann K. CD3-dependent regulation of early TCRβ gene expression in mainstream αβ and NKαβ T cell development. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2001. [DOI: 10.1007/978-1-4615-0685-0_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Baldari CT, Telford JL, Acuto O. EMBO WORKSHOP REPORT: lymphocyte antigen receptor and coreceptor signaling Siena, Italy, November 6-10, 1999. EMBO J 2000; 19:4857-65. [PMID: 10990449 PMCID: PMC314226 DOI: 10.1093/emboj/19.18.4857] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- C T Baldari
- Department of Evolutionary Biology, University of Siena, Via Mattioli 4, 53100 Siena, Italy
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12
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Aifantis I, Feinberg J, Fehling HJ, Di Santo JP, von Boehmer H. Early T cell receptor beta gene expression is regulated by the pre-T cell receptor-CD3 complex. J Exp Med 1999; 190:141-4. [PMID: 10429678 PMCID: PMC2195557 DOI: 10.1084/jem.190.1.141] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
We have examined the question of whether there is an additional checkpoint in T cell development that regulates T cell receptor (TCR)-beta expression in CD25+44- thymocytes by mechanisms that are independent of the pre-TCR. Our analysis in various mutant mice indicates that all changes in cytoplasmic TCR-beta expression can be accounted for by pre-TCR-dependent signal mediation, putting into question the function of a putative pro-TCR.
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Affiliation(s)
- I Aifantis
- Institut National de la Santé et de la Recherche Médicale (INSERM) U373, Hôpital Necker-Enfants Malades, Paris, France
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