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  • 1
    Publication Date: 2008-12-17
    Description: Chronic immunodeficiency virus infections are characterized by dysfunctional cellular and humoral antiviral immune responses. As such, immune modulatory therapies that enhance and/or restore the function of virus-specific immunity may protect from disease progression. Here we investigate the safety and immune restoration potential of blockade of the co-inhibitory receptor programmed death 1 (PD-1) during chronic simian immunodeficiency virus (SIV) infection in macaques. We demonstrate that PD-1 blockade using an antibody to PD-1 is well tolerated and results in rapid expansion of virus-specific CD8 T cells with improved functional quality. This enhanced T-cell immunity was seen in the blood and also in the gut, a major reservoir of SIV infection. PD-1 blockade also resulted in proliferation of memory B cells and increases in SIV envelope-specific antibody. These improved immune responses were associated with significant reductions in plasma viral load and also prolonged the survival of SIV-infected macaques. Blockade was effective during the early (week 10) as well as late ( approximately week 90) phases of chronic infection even under conditions of severe lymphopenia. These results demonstrate enhancement of both cellular and humoral immune responses during a pathogenic immunodeficiency virus infection by blocking a single inhibitory pathway and identify a novel therapeutic approach for control of human immunodeficiency virus infections.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2753387/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2753387/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Velu, Vijayakumar -- Titanji, Kehmia -- Zhu, Baogong -- Husain, Sajid -- Pladevega, Annette -- Lai, Lilin -- Vanderford, Thomas H -- Chennareddi, Lakshmi -- Silvestri, Guido -- Freeman, Gordon J -- Ahmed, Rafi -- Amara, Rama Rao -- P30 AI050409/AI/NIAID NIH HHS/ -- P51 RR00165/RR/NCRR NIH HHS/ -- R01 AI057029/AI/NIAID NIH HHS/ -- R01 AI057029-01/AI/NIAID NIH HHS/ -- R01 AI057029-02/AI/NIAID NIH HHS/ -- R01 AI057029-03/AI/NIAID NIH HHS/ -- R01 AI057029-04/AI/NIAID NIH HHS/ -- R01 AI057029-05/AI/NIAID NIH HHS/ -- R01 AI071852/AI/NIAID NIH HHS/ -- R01 AI074417/AI/NIAID NIH HHS/ -- R01 AI074417-01A1/AI/NIAID NIH HHS/ -- R01 AI074417-02/AI/NIAID NIH HHS/ -- R24 RR16038/RR/NCRR NIH HHS/ -- England -- Nature. 2009 Mar 12;458(7235):206-10. doi: 10.1038/nature07662. Epub 2008 Dec 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia 30322, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19078956" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/administration & dosage/*metabolism/pharmacology ; Antibodies, Viral/blood ; Antibody Formation/drug effects/immunology ; Apoptosis Regulatory Proteins/*metabolism ; CD8-Positive T-Lymphocytes ; Gene Products, gag/blood ; Immunity, Innate/*drug effects ; Intestines/drug effects/immunology ; Macaca mulatta ; Molecular Sequence Data ; Simian Acquired Immunodeficiency Syndrome/*immunology ; Simian Immunodeficiency Virus/*immunology ; Survival Analysis ; Viremia/immunology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 1997-10-06
    Description: In the absence of costimulation, T cells activated through their antigen receptor become unresponsive (anergic) and do not transcribe the gene encoding interleukin-2 (IL-2) when restimulated with antigen. Anergic alloantigen-specific human T cells contained phosphorylated Cbl that coimmunoprecipitated with Fyn. The adapter protein CrkL was associated with both phosphorylated Cbl and the guanidine nucleotide-releasing factor C3G, which catalyzes guanosine triphosphate (GTP) exchange on Rap1. Active Rap1 (GTP-bound form) was present in anergic cells. Forced expression of low amounts of Rap1-GTP in Jurkat T cells recapitulated the anergic defect and blocked T cell antigen receptor (TCR)- and CD28-mediated IL-2 gene transcription. Therefore, Rap1 functions as a negative regulator of TCR-mediated IL-2 gene transcription and may be responsible for the specific defect in IL-2 production in T cell anergy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boussiotis, V A -- Freeman, G J -- Berezovskaya, A -- Barber, D L -- Nadler, L M -- AI 35225/AI/NIAID NIH HHS/ -- AI39671/AI/NIAID NIH HHS/ -- HL 54785/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1997 Oct 3;278(5335):124-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Adult Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA. vassiliki_boussiotis@macmailgw.dfci.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9311917" target="_blank"〉PubMed〈/a〉
    Keywords: *Adaptor Proteins, Signal Transducing ; Antigens, CD28/immunology ; *Clonal Anergy ; GTP-Binding Proteins/*metabolism ; Gene Expression Regulation ; Guanine Nucleotide Exchange Factors ; Guanosine Triphosphate/metabolism ; Humans ; Interleukin-2/*genetics ; Jurkat Cells ; Nuclear Proteins/metabolism ; Phosphorylation ; Protein-Tyrosine Kinases/metabolism ; Proteins/metabolism ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins c-cbl ; Proto-Oncogene Proteins c-fyn ; Receptors, Antigen, T-Cell/immunology ; Recombinant Fusion Proteins/metabolism ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; *Transcription, Genetic ; Transfection ; *Ubiquitin-Protein Ligases ; rap GTP-Binding Proteins ; ras Guanine Nucleotide Exchange Factors ; ras Proteins/metabolism ; src Homology Domains
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 1993-11-05
    Description: B7 delivers a costimulatory signal through CD28, resulting in interleukin-2 secretion and T cell proliferation. Blockade of this pathway results in T cell anergy. The in vivo role of B7 was evaluated with B7-deficient mice. These mice had a 70 percent decrease in costimulation of the response to alloantigen. Despite lacking B7 expression, activated B cells from these mice bound CTLA-4 and GL1 monoclonal antibody, demonstrating that alternative CTLA-4 ligand or ligands exist. These receptors are functionally important because the residual allogenic mixed lymphocyte responses were blocked by CTLA4Ig. Characterization of these CTLA-4 ligands should lead to strategies for manipulating the immune response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freeman, G J -- Borriello, F -- Hodes, R J -- Reiser, H -- Hathcock, K S -- Laszlo, G -- McKnight, A J -- Kim, J -- Du, L -- Lombard, D B -- CA 40216/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1993 Nov 5;262(5135):907-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Hematologic Malignancies, Dana-Farber Cancer Institute, Boston, MA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7694362" target="_blank"〉PubMed〈/a〉
    Keywords: Abatacept ; Animals ; Antigens, CD ; Antigens, CD80/genetics/*immunology/metabolism ; Antigens, Differentiation/immunology/*metabolism ; B-Lymphocytes/*immunology ; Base Sequence ; CTLA-4 Antigen ; Cell Line ; *Immunoconjugates ; Interleukin-2/secretion ; Isoantigens/immunology ; Lymphocyte Activation ; Lymphocyte Culture Test, Mixed ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Mice, Knockout ; Molecular Sequence Data ; Mutation ; T-Lymphocytes/*immunology ; Transfection
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 1993-11-05
    Description: Although presentation of antigen to the T cell receptor is necessary for the initiation of an immune response, additional molecules expressed on antigen-presenting cells deliver essential costimulatory signals. T cell activation, in the absence of costimulation, results in T cell anergy. The B7-1 protein is a costimulator molecule that regulates interleukin-2 (IL-2) secretion by signaling through the pathway that uses CD28 and CTLA-4 (hereafter referred to as the CD28 pathway). We have cloned a counter-receptor of CD28 and CTLA-4, termed B7-2. Although only 26 percent identical to B7-1, B7-2 also costimulates IL-2 production and T cell proliferation. Unlike B7-1, B7-2 messenger RNA is constitutively expressed in unstimulated B cells. It is likely that B7-2 provides a critical early costimulatory signal determining if the T cell will contribute to an immune response or become anergic.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Freeman, G J -- Gribben, J G -- Boussiotis, V A -- Ng, J W -- Restivo, V A Jr -- Lombard, L A -- Gray, G S -- Nadler, L M -- CA 40216/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1993 Nov 5;262(5135):909-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Hematologic Malignancies, Dana-Farber Cancer Institute.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7694363" target="_blank"〉PubMed〈/a〉
    Keywords: Abatacept ; Amino Acid Sequence ; Animals ; *Antigens, CD ; Antigens, CD28/metabolism ; Antigens, CD80/chemistry/genetics/*immunology/metabolism ; Antigens, CD86 ; Antigens, Differentiation/*metabolism ; B-Lymphocytes/*immunology/metabolism ; CTLA-4 Antigen ; Cell Line ; *Cloning, Molecular ; DNA, Complementary/genetics ; Humans ; *Immunoconjugates ; *Lymphocyte Activation ; *Membrane Glycoproteins ; Molecular Sequence Data ; Sequence Alignment ; Signal Transduction ; T-Lymphocytes/*immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2014-11-28
    Description: The immune system influences the fate of developing cancers by not only functioning as a tumour promoter that facilitates cellular transformation, promotes tumour growth and sculpts tumour cell immunogenicity, but also as an extrinsic tumour suppressor that either destroys developing tumours or restrains their expansion. Yet, clinically apparent cancers still arise in immunocompetent individuals in part as a consequence of cancer-induced immunosuppression. In many individuals, immunosuppression is mediated by cytotoxic T-lymphocyte associated antigen-4 (CTLA-4) and programmed death-1 (PD-1), two immunomodulatory receptors expressed on T cells. Monoclonal-antibody-based therapies targeting CTLA-4 and/or PD-1 (checkpoint blockade) have yielded significant clinical benefits-including durable responses--to patients with different malignancies. However, little is known about the identity of the tumour antigens that function as the targets of T cells activated by checkpoint blockade immunotherapy and whether these antigens can be used to generate vaccines that are highly tumour-specific. Here we use genomics and bioinformatics approaches to identify tumour-specific mutant proteins as a major class of T-cell rejection antigens following anti-PD-1 and/or anti-CTLA-4 therapy of mice bearing progressively growing sarcomas, and we show that therapeutic synthetic long-peptide vaccines incorporating these mutant epitopes induce tumour rejection comparably to checkpoint blockade immunotherapy. Although mutant tumour-antigen-specific T cells are present in progressively growing tumours, they are reactivated following treatment with anti-PD-1 and/or anti-CTLA-4 and display some overlapping but mostly treatment-specific transcriptional profiles, rendering them capable of mediating tumour rejection. These results reveal that tumour-specific mutant antigens are not only important targets of checkpoint blockade therapy, but they can also be used to develop personalized cancer-specific vaccines and to probe the mechanistic underpinnings of different checkpoint blockade treatments.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4279952/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4279952/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gubin, Matthew M -- Zhang, Xiuli -- Schuster, Heiko -- Caron, Etienne -- Ward, Jeffrey P -- Noguchi, Takuro -- Ivanova, Yulia -- Hundal, Jasreet -- Arthur, Cora D -- Krebber, Willem-Jan -- Mulder, Gwenn E -- Toebes, Mireille -- Vesely, Matthew D -- Lam, Samuel S K -- Korman, Alan J -- Allison, James P -- Freeman, Gordon J -- Sharpe, Arlene H -- Pearce, Erika L -- Schumacher, Ton N -- Aebersold, Ruedi -- Rammensee, Hans-Georg -- Melief, Cornelis J M -- Mardis, Elaine R -- Gillanders, William E -- Artyomov, Maxim N -- Schreiber, Robert D -- P01 AI054456/AI/NIAID NIH HHS/ -- P30 AR048335/AR/NIAMS NIH HHS/ -- P30 CA016672/CA/NCI NIH HHS/ -- P30 CA091842/CA/NCI NIH HHS/ -- P50 CA101942/CA/NCI NIH HHS/ -- R01 AI091965/AI/NIAID NIH HHS/ -- R01 CA043059/CA/NCI NIH HHS/ -- R01 CA190700/CA/NCI NIH HHS/ -- R37 CA043059/CA/NCI NIH HHS/ -- T32 CA009547/CA/NCI NIH HHS/ -- T32 CA00954729/CA/NCI NIH HHS/ -- U01 CA141541/CA/NCI NIH HHS/ -- England -- Nature. 2014 Nov 27;515(7528):577-81. doi: 10.1038/nature13988.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology and Immunology, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, Missouri 63110, USA. ; Department of Surgery, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, Missouri 63110, USA. ; Department of Immunology, Institute of Cell Biology, and German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ) Partner Site Tubingen, Auf der Morgenstelle 15, 72076 Tubingen, Germany. ; Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, 8093 Zurich, Switzerland. ; 1] Department of Pathology and Immunology, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, Missouri 63110, USA [2] Department of Medicine, Division of Oncology, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, Missouri 63110, USA. ; The Genome Institute, Washington University School of Medicine, 4444 Forest Park Avenue, St Louis, Missouri 63108, USA. ; ISA Therapeutics B.V., 2333 CH Leiden, The Netherlands. ; Division of Immunology, The Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands. ; Bristol-Myers Squibb, 700 Bay Road, Redwood City, California 94063, USA. ; Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA. ; Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Department of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts 02115, USA. ; 1] Department of Biology, Institute of Molecular Systems Biology, ETH Zurich, 8093 Zurich, Switzerland [2] Faculty of Science, University of Zurich, Zurich, 8093 Zurich, Switzerland. ; 1] ISA Therapeutics B.V., 2333 CH Leiden, The Netherlands [2] Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333ZA Leiden, The Netherlands. ; 1] The Genome Institute, Washington University School of Medicine, 4444 Forest Park Avenue, St Louis, Missouri 63108, USA [2] Department of Genetics, Washington University School of Medicine, 660 South Euclid Avenue, St Louis, Missouri 63110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25428507" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Monoclonal/*therapeutic use ; Antigens, Neoplasm/*genetics/*immunology ; CD8-Positive T-Lymphocytes/*immunology ; Cancer Vaccines/*therapeutic use ; Cell Cycle Checkpoints/*immunology ; Epitopes/genetics ; *Immunotherapy ; Male ; Mice ; Sarcoma/immunology/*therapy ; Vaccines, Synthetic/therapeutic use
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1994-11-11
    Description: When stimulated through their antigen receptor without requisite costimulation, T cells enter a state of antigen-specific unresponsiveness termed anergy. In this study, signaling through the common gamma chain of the interleukin-2 (IL-2), IL-4, and IL-7 receptors in the presence of antigen was found to be sufficient to prevent the induction of anergy. After culture with IL-2, IL-4, or IL-7, Jak3 kinase was tyrosine-phosphorylated, which correlated with the prevention of anergy. Therefore, a signal through the common gamma chain may regulate the decision of T cells to either clonally expand or enter a state of anergy.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Boussiotis, V A -- Barber, D L -- Nakarai, T -- Freeman, G J -- Gribben, J G -- Bernstein, G M -- D'Andrea, A D -- Ritz, J -- Nadler, L M -- AI 35225/AI/NIAID NIH HHS/ -- CA 40216/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1994 Nov 11;266(5187):1039-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Hematologic Malignancies, Dana-Farber Cancer Institute, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7973657" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Clonal Anergy/*immunology ; Clone Cells ; HLA-DR7 Antigen/immunology ; Humans ; Interleukins/immunology ; Janus Kinase 3 ; Lymphocyte Activation ; Phosphorylation ; Protein-Tyrosine Kinases/metabolism ; Receptors, Antigen, T-Cell/metabolism ; Receptors, Interleukin-2/immunology/*metabolism ; *Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; Tumor Necrosis Factor-alpha/immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] FIG. 1 a, Coculture of C8A3 with F6 but not with 5C2 induces B7 surface expression. The control staining is superimposed on the 1G10 staining for cells cultured alone (upper panel), but is shown separately for the co-cultured cells (lower panels), b, Antigen presentation by F6 cells is blocked by a ...
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  • 8
    Publication Date: 2008-07-23
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 9
    Publication Date: 1994-08-02
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 10
    Publication Date: 1993-07-15
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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