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Stifter K, Krieger J, Ruths L, Gout J, Mulaw M, Lechel A, Kleger A, Seufferlein T, Wagner M, Schirmbeck R. IFN-γ treatment protocol for MHC-I lo/PD-L1 + pancreatic tumor cells selectively restores their TAP-mediated presentation competence and CD8 T-cell priming potential. J Immunother Cancer 2021; 8:jitc-2020-000692. [PMID: 32868392 PMCID: PMC7462314 DOI: 10.1136/jitc-2020-000692] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2020] [Indexed: 12/13/2022] Open
Abstract
Background Many cancer cells express a major histocompatibility complex class I low/ programmed cell death 1 ligand 1 positive (MHC-Ilo/PD-L1+) cell surface profile. For immunotherapy, there is, thus, an urgent need to restore presentation competence of cancer cells with defects in MHC-I processing/presentation combined with immune interventions that tackle the tumor-initiated PD-L1/PD-1 signaling axis. Using pancreatic ductal adenocarcinoma cells (PDACCs) as a model, we here explored if (and how) expression/processing of tumor antigens via transporters associated with antigen processing (TAP) affects priming of CD8 T cells in PD-1/PD-L1-competent/-deficient mice. Methods We generated tumor antigen-expressing vectors, immunized TAP-competent/-deficient mice and determined de novo primed CD8 T-cell frequencies by flow cytometry. Similarly, we explored the antigenicity and PD-L1/PD-1 sensitivity of PDACCs versus interferon-γ (IFN-γ)-treated PDACCs in PD-1/PD-L1-competent/deficient mice. The IFN-γ-induced effects on gene and cell surface expression profiles were determined by microarrays and flow cytometry. Results We identified two antigens (cripto-1 and an endogenous leukemia virus-derived gp70) that were expressed in the Endoplasmic Reticulum (ER) of PDACCs and induced CD8 T-cell responses either independent (Cripto-1:Kb/Cr16-24) or dependent (gp70:Kb/p15E) on TAP by DNA immunization. IFN-γ-treatment of PDACCs in vitro upregulated MHC-I- and TAP- but also PD-L1-expression. Mechanistically, PD-L1/PD-1 signaling was superior to the reconstitution of MHC-I presentation competence, as subcutaneously transplanted IFN-γ-treated PDACCs developed tumors in C57BL/6J and PD-L1-/- but not in PD-1-/- mice. Using PDACCs, irradiated at day 3 post-IFN-γ-treatment or PD-L1 knockout PDACCs as vaccines, we could selectively bypass upregulation of PD-L1, preferentially induce TAP-dependent gp70:Kb/p15E-specific CD8 T cells associated with a weakened PD-1+ exhaustion phenotype and reject consecutively injected tumor transplants in C57BL/6J mice. Conclusions The IFN-γ-treatment protocol is attractive for cell-based immunotherapies, because it restores TAP-dependent antigen processing in cancer cells, facilitates priming of TAP-dependent effector CD8 T-cell responses without additional check point inhibitors and could be combined with genetic vaccines that complement priming of TAP-independent CD8 T cells.
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Affiliation(s)
- Katja Stifter
- Internal Medicine I, University Hospital Ulm, Ulm, Germany
| | - Jana Krieger
- Internal Medicine I, University Hospital Ulm, Ulm, Germany
| | - Leonie Ruths
- Internal Medicine I, University Hospital Ulm, Ulm, Germany
| | - Johann Gout
- Internal Medicine I, University Hospital Ulm, Ulm, Germany
| | - Medhanie Mulaw
- Institute of Experimental Cancer Research, University Hospital Ulm, Ulm, Germany
| | - Andre Lechel
- Internal Medicine I, University Hospital Ulm, Ulm, Germany
| | | | | | - Martin Wagner
- Internal Medicine I, University Hospital Ulm, Ulm, Germany
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Seneschal J, Boniface K, D'Arino A, Picardo M. An update on Vitiligo pathogenesis. Pigment Cell Melanoma Res 2020; 34:236-243. [PMID: 33278065 DOI: 10.1111/pcmr.12949] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 11/10/2020] [Accepted: 12/01/2020] [Indexed: 12/16/2022]
Abstract
Vitiligo, the most common depigmenting disorder of the skin, is undergoing a period of intense advances in both disease understanding and therapeutic possibilities leading the way to the beginning of a new era for the disorder. Its pathophysiology has gathered the attention of researchers for years, and many advances have been made in the clarification of the interaction between different factors that result in depigmented macule formation. The complex interplay between non-immunological and immunological factors in vitiligo is key for the development of the disease, and the participation of cells other than melanocytes, such as keratinocytes, fibroblasts, natural killer cells, and innate lymphoid cells, has been shown. Recent advances have also brought to the understanding of the complex part played by a specific subtype of T cells: T-resident memory cells. This review analyzes some of the most recent insights in vitiligo pathogenesis underlining the interactions between different cell types, which are the basis for the therapeutic approaches under development.
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Affiliation(s)
- Julien Seneschal
- INSERM U1035, Biotherapy of Genetic Diseases, Inflammatory Disorders and Cancers (BMGIC), Immunodermatology ATIP-AVENIR, University of Bordeaux, FHU ACRONIM, Bordeaux, France.,Department of Dermatology and Pediatric Dermatology and National Reference Center for Rare Skin Disorders, Hôpital Saint-André, Bordeaux, France
| | - Katia Boniface
- INSERM U1035, Biotherapy of Genetic Diseases, Inflammatory Disorders and Cancers (BMGIC), Immunodermatology ATIP-AVENIR, University of Bordeaux, FHU ACRONIM, Bordeaux, France
| | - Andrea D'Arino
- San Gallicano Dermatological Institute, IRCCS, Rome, Italy
| | - Mauro Picardo
- San Gallicano Dermatological Institute, IRCCS, Rome, Italy
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Stifter K, Dekhtiarenko I, Krieger J, Tissot AC, Seufferlein T, Wagner M, Schirmbeck R. A tumor-specific neoepitope expressed in homologous/self or heterologous/viral antigens induced comparable effector CD8 + T-cell responses by DNA vaccination. Vaccine 2020; 38:3711-3719. [PMID: 32278524 DOI: 10.1016/j.vaccine.2020.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 03/06/2020] [Accepted: 04/01/2020] [Indexed: 12/19/2022]
Abstract
Somatic mutations in tumors often generate neoproteins that contain MHC-I-binding neoepitopes. Little is known if and how efficient tumor-specific neoantigens activate CD8+ T cells. Here, we asked whether a de novo generated neoepitope, encoded either within an otherwise conserved and ubiquitously expressed self-antigen or in a chimeric HBV core antigen expression platform, providing heterologous helper functions, induces CD8+ T cells in C57Bl/6J mice by DNA immunization. For it, we chose an established Db/Sp244-252/R251H neoepitope generated in the murine Endophilin-B2/SH3GLB2 (EndoB2-Sp) protein by a single amino acid exchange. We showed that a single injection of EndoB2-Sp expression vectors efficiently primed dimer/pentamer+, IFN-γ+ and cytolytic Db/Sp244-252/R251H-specific effector CD8+ T cells in C57Bl/6J mice. Priming of Db/Sp244-252/R251H-specific CD8+ T cells proceeded independent from CD4+ T-cell help in MHC-II-deficient Aα-/- mice. As compared to the homologous EndoB2-Sp vaccine, the selective expression of the Db/Sp244-252/R251H neoepitope in chimeric particle-forming and assembly-deficient HBV core antigens induced comparable frequencies Db/Sp244-252/R251H-specific CD8+ T cells with the same cytolytic effector phenotype. The homologous EndoB2 carrier, but not the nine-residue neoepitope presented on chimeric HBV core particles, induced EndoB2-specific IgG antibody responses. The HBV core expression platform is thus an attractive option to selectively induce neoepitope-specific effector CD8+ T cells by DNA vaccination. These novel findings have practical implications for the design of heterologous/self and heterologous/viral cancer vaccines that prime and/or activate neoepitope-specific CD8+ T cells.
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Affiliation(s)
- Katja Stifter
- Department of Internal Medicine I, Ulm University Hospital, Albert Einstein Allee 23, 89081 Ulm, Germany
| | - Iryna Dekhtiarenko
- Department of Internal Medicine I, Ulm University Hospital, Albert Einstein Allee 23, 89081 Ulm, Germany; Roche Pharma Research and Early Development, Roche Innovation Center Zürich, Schlieren, Switzerland
| | - Jana Krieger
- Department of Internal Medicine I, Ulm University Hospital, Albert Einstein Allee 23, 89081 Ulm, Germany
| | - Alain Charles Tissot
- Roche Pharma Research and Early Development, Therapeutic Modalities, Large Molecule Research, Roche Innovation Center Munich, Roche Diagnostics GmbH; Nonnenwald 2, 82377 Penzberg, Germany
| | - Thomas Seufferlein
- Department of Internal Medicine I, Ulm University Hospital, Albert Einstein Allee 23, 89081 Ulm, Germany
| | - Martin Wagner
- Department of Internal Medicine I, Ulm University Hospital, Albert Einstein Allee 23, 89081 Ulm, Germany
| | - Reinhold Schirmbeck
- Department of Internal Medicine I, Ulm University Hospital, Albert Einstein Allee 23, 89081 Ulm, Germany.
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The relationship between stress and vitiligo: Evaluating perceived stress and electronic medical record data. PLoS One 2020; 15:e0227909. [PMID: 31986193 PMCID: PMC6984686 DOI: 10.1371/journal.pone.0227909] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 12/22/2019] [Indexed: 02/06/2023] Open
Abstract
Vitiligo is a T-cell mediated skin disorder characterized by progressive loss of skin color. In individuals genetically predisposed to the disease, various triggers contribute to the initiation of vitiligo. Precipitating factors can stress the skin, leading to T-cell activation and recruitment. Though hereditary factors are implicated in the pathogenesis of vitiligo, it is unknown whether precipitating, stressful events play a role in vitiligo. To understand this, we utilized a validated perceived stress scale (PSS) to measure this parameter in vitiligo patients compared to persons without vitiligo. Additionally, we probed a clinical database, using a knowledge linking software called ROCKET, to gauge stress-related conditions in the vitiligo patient population. From a pool of patients in an existing database, a hundred individuals with vitiligo and twenty-five age- and sex-matched comparison group of individuals without vitiligo completed an online survey to quantify their levels of perceived stress. In parallel, patients described specifics of their disease condition, including the affected body sites, the extent, duration and activity of their vitiligo. Perceived stress was significantly higher among vitiligo individuals compared to those without vitiligo. ROCKET analyses suggested signs of metabolic-related disease (i.e., ‘stress’) preceding vitiligo development. No correlation was found between perceived stress and the stage or the extent of disease, suggesting that elevated stress may not be a consequence of pigment loss alone. The data provide further support for stress as a precipitating factor in vitiligo development.
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Endogenously Expressed Antigens Bind Mammalian RNA via Cationic Domains that Enhance Priming of Effector CD8 T Cells by DNA Vaccination. Mol Ther 2019; 27:661-672. [PMID: 30713086 PMCID: PMC6403493 DOI: 10.1016/j.ymthe.2019.01.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 01/08/2019] [Accepted: 01/11/2019] [Indexed: 01/11/2023] Open
Abstract
Hepatitis B virus (HBV) core (HBV-C) antigens with homologous or heterologous HIV-tat48-57-like (HBV-C149tat) cationic domains non-specifically bind cellular RNA in vector-transfected cells. Here, we investigated whether RNA-binding to cationic domains influences the immunogenicity of endogenously expressed antigens delivered by DNA vaccination. We initially evaluated induction of HBV-C (Kb/C93)-specific CD8+ T cell responses in C57BL/6J (B6) and 1.4HBV-Smut transgenic (tg) mice that harbor a replicating HBV genome in hepatocytes by DNA immunization. RNA-binding HBV-C and HBV-C149tat antigens moderately enhanced Kb/C93-specific CD8+ T cells in B6 mice as compared with RNA-free HBV-C149 antigen (lacking cationic domains). However, only the RNA-binding antigens elicited Kb/C93-specific CD8+ T cells that inhibited HBV replication in 1.4HBV-Smut tg mice. Moreover, RNA-binding to designer antigens, which express a Kb/p15E epitope from an endogenous murine leukemia virus-derived tumor-specific gp70 protein, was crucial to prime tumor-rejecting effector CD8+ T cells in B6 mice. Antigen-bound endogenous RNAs function as a Toll-like receptor 7 (TLR-7) ligand and stimulated priming of Kb/p15E-specific CD8+ T cells in B6, but not TLR-7−/−, mice. Antigen-bound cellular RNAs thus function as an endogenous natural adjuvant in in vivo vector-transfected cells, and thus are an attractive tool to induce and/or enhance effector CD8+ T cell responses directed against chronic viral infections or tumor self-antigens by DNA vaccination.
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Almajhdi FN, Senger T, Amer HM, Gissmann L, Öhlschläger P. Design of a highly effective therapeutic HPV16 E6/E7-specific DNA vaccine: optimization by different ways of sequence rearrangements (shuffling). PLoS One 2014; 9:e113461. [PMID: 25422946 PMCID: PMC4244082 DOI: 10.1371/journal.pone.0113461] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 10/28/2014] [Indexed: 01/22/2023] Open
Abstract
Persistent infection with the high-risk Human Papillomavirus type 16 (HPV 16) is the causative event for the development of cervical cancer and other malignant tumors of the anogenital tract and of the head and neck. Despite many attempts to develop therapeutic vaccines no candidate has entered late clinical trials. An interesting approach is a DNA based vaccine encompassing the nucleotide sequence of the E6 and E7 viral oncoproteins. Because both proteins are consistently expressed in HPV infected cells they represent excellent targets for immune therapy. Here we report the development of 8 DNA vaccine candidates consisting of differently rearranged HPV-16 E6 and E7 sequences within one molecule providing all naturally occurring epitopes but supposedly lacking transforming activity. The HPV sequences were fused to the J-domain and the SV40 enhancer in order to increase immune responses. We demonstrate that one out of the 8 vaccine candidates induces very strong cellular E6- and E7- specific cellular immune responses in mice and, as shown in regression experiments, efficiently controls growth of HPV 16 positive syngeneic tumors. This data demonstrates the potential of this vaccine candidate to control persistent HPV 16 infection that may lead to malignant disease. It also suggests that different sequence rearrangements influence the immunogenecity by an as yet unknown mechanism.
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MESH Headings
- Alphapapillomavirus/immunology
- Animals
- Antibodies, Viral/biosynthesis
- Cell Line, Tumor
- Female
- Human Papillomavirus Recombinant Vaccine Quadrivalent, Types 6, 11, 16, 18
- Humans
- Mice
- Mice, Inbred C57BL
- Neoplasms, Experimental/pathology
- Oncogene Proteins, Viral/immunology
- Papillomavirus E7 Proteins/immunology
- Papillomavirus Vaccines/genetics
- Repressor Proteins/immunology
- Vaccines, DNA/genetics
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Affiliation(s)
- Fahad N. Almajhdi
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
- * E-mail:
| | - Tilo Senger
- German Cancer Research Center, Heidelberg, Germany
| | - Haitham M. Amer
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
- Virology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Lutz Gissmann
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
- German Cancer Research Center, Heidelberg, Germany
| | - Peter Öhlschläger
- Department of Chemistry and Biotechnology, Aachen University of Applied Sciences, Jülich, Germany
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Kim HS, Kang D, Moon MH, Kim HJ. Identification of pancreatic cancer-associated tumor antigen from HSP-enriched tumor lysate-pulsed human dendritic cells. Yonsei Med J 2014; 55:1014-27. [PMID: 24954332 PMCID: PMC4075362 DOI: 10.3349/ymj.2014.55.4.1014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 10/23/2013] [Accepted: 11/04/2013] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Vaccine strategies utilizing dendritic cells (DCs) to elicit anti-tumor immunity are the subject of intense research. Although we have shown that DCs pulsed with heat-treated tumor lysate (HTL) induced more potent anti-tumor immunity than DCs pulsed with conventional tumor lysate (TL), the underlying molecular mechanism is unclear. In order to explore the molecular basis of this approach and to identify potential antigenic peptides from pancreatic cancer, we analyzed and compared the major histocompatibility complex (MHC) ligands derived from TL- and HTL-pulsed dendritic cells by mass spectrophotometry. MATERIALS AND METHODS Human monocyte-derived dendritic cells were pulsed with TL or HTL prior to maturation induction. To delineate differences of MHC-bound peptide repertoire eluted from DCs pulsed with TL or HTL, nanoflow liquid chromatography-electrospray ionization-tandem mass spectrometry (nLC-ESI-MS-MS) was employed. RESULTS HTL, but not TL, significantly induced DC function, assessed by phenotypic maturation, allostimulation capacity and IFN-γ secretion by stimulated allogeneic T cells. DCs pulsed with TL or HTL displayed pancreas or pancreatic cancer-related peptides in context of MHC class I and II molecules. Some of the identified peptides had not been previously reported as expressed in pancreatic cancer or cancer of other tissue types. CONCLUSION Our partial lists of MHC-associated peptides revealed the differences between peptide profiles eluted from HTL-and TL-loaded DCs, implying that induced heat shock proteins in HTL chaperone tumor-derived peptides enhanced their delivery to DCs and promoted cross-presentation by DC. These findings may aid in identifying novel tumor antigens or biomarkers and in designing future vaccination strategies.
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Affiliation(s)
- Han-Soo Kim
- Innovative Cell and Gene Therapy Center, International St. Mary's Hospital, Incheon, Korea
| | - Dukjin Kang
- Center for Bioanalysis, Division of Metrology for Quality of Life, Korea Research Institute of Standards and Science, Daejeon, Korea
| | | | - Hyung Jik Kim
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea.
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Heat Shock Proteins: Intestinal Gatekeepers that Are Influenced by Dietary Components and the Gut Microbiota. Pathogens 2014; 3:187-210. [PMID: 25437614 PMCID: PMC4235725 DOI: 10.3390/pathogens3010187] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Revised: 02/06/2014] [Accepted: 02/18/2014] [Indexed: 02/07/2023] Open
Abstract
Trillions of microorganisms that inhabit the intestinal tract form a diverse and intricate ecosystem with a deeply embedded symbiotic relationship with their hosts. As more detailed information on gut microbiota complexity and functional diversity accumulates, we are learning more about how diet-microbiota interactions can influence the immune system within and outside the gut and host health in general. Heat shock proteins are a set of highly conserved proteins that are present in all types of cells, from microbes to mammals. These proteins carry out crucial intracellular housekeeping functions and unexpected extracellular immuno-regulatory features in order to maintain the mucosal barrier integrity and gut homeostasis. It is becoming evident that the enteric microbiota is one of the major determinants of heat shock protein production in intestinal epithelial cells. This review will focus on the interactions between diet, gut microbiota and their role for regulating heat shock protein production and, furthermore, how these interactions influence the immune system and the integrity of the mucosal barrier.
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Mosenson JA, Flood K, Klarquist J, Eby JM, Koshoffer A, Boissy RE, Overbeck A, Tung RC, Le Poole IC. Preferential secretion of inducible HSP70 by vitiligo melanocytes under stress. Pigment Cell Melanoma Res 2014; 27:209-20. [PMID: 24354861 DOI: 10.1111/pcmr.12208] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 12/16/2013] [Indexed: 11/30/2022]
Abstract
Inducible HSP70 (HSP70i) chaperones peptides from stressed cells, protecting them from apoptosis. Upon extracellular release, HSP70i serves an adjuvant function, enhancing immune responses to bound peptides. We questioned whether HSP70i differentially protects control and vitiligo melanocytes from stress and subsequent immune responses. We compared expression of HSP70i in skin samples, evaluated the viability of primary vitiligo and control melanocytes exposed to bleaching phenols, and measured secreted HSP70i. We determined whether HSP70i traffics to melanosomes to contact immunogenic proteins by cell fractionation, western blotting, electron microscopy, and confocal microscopy. Viability of vitiligo and control melanocytes was equally affected under stress. However, vitiligo melanocytes secreted increased amounts of HSP70i in response to MBEH, corroborating with aberrant HSP70i expression in patient skin. Intracellular HSP70i colocalized with melanosomes, and more so in response to MBEH in vitiligo melanocytes. Thus, whereas either agent is cytotoxic to melanocytes, MBEH preferentially induces immune responses to melanocytes.
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Affiliation(s)
- Jeffrey A Mosenson
- Departments of Pathology and Microbiology & Immunology/Cardinal Bernardin Cancer Center, Loyola University Chicago, Maywood, IL, USA
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10
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Mosenson JA, Eby JM, Hernandez C, Le Poole IC. A central role for inducible heat-shock protein 70 in autoimmune vitiligo. Exp Dermatol 2013; 22:566-9. [PMID: 23786523 DOI: 10.1111/exd.12183] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2013] [Indexed: 12/14/2022]
Abstract
Inducible heat-shock protein 70 (HSP70i) is a protein regulated by stress that protects cells from undergoing apoptosis. Such proteins are marvellously well conserved throughout evolution, which has placed them in the spotlight for helping to understand the intriguing relationship between infection and immunity. In the presence of stress proteins, dendritic cells (DCs) will sense this alarm signal and respond by recruiting immune cells of different plumage to fit the occasion. In times of stress, melanocytes will secrete antigen-bound HSP70i to act as an alarm signal in activating DCs that comes equipped with an address of origin to drive the autoimmune response in vitiligo. Here we pose that if the autoimmune response is funnelled through HSP70i, then blocking the stress protein from activating DCs can lend new treatment opportunities for vitiligo.
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Affiliation(s)
- Jeffrey A Mosenson
- Department of Pathology, Cardinal Bernardin Cancer Center, Loyola University Chicago, Maywood, IL, USA
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11
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Borges TJ, Wieten L, van Herwijnen MJC, Broere F, van der Zee R, Bonorino C, van Eden W. The anti-inflammatory mechanisms of Hsp70. Front Immunol 2012; 3:95. [PMID: 22566973 PMCID: PMC3343630 DOI: 10.3389/fimmu.2012.00095] [Citation(s) in RCA: 176] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Accepted: 04/11/2012] [Indexed: 01/08/2023] Open
Abstract
Immune responses to heat shock proteins (Hsp) develop in virtually all inflammatory diseases; however, the significance of such responses is only now becoming clear. In experimental disease models, Hsp administration can prevent or arrest inflammatory damage, and in initial clinical trials in patients with chronic inflammatory diseases, Hsp peptides have been shown to promote the production of anti-inflammatory cytokines, indicating immunoregulatory potential of Hsp. Therefore, the presence of immune responses to Hsp in inflammatory diseases can be seen as an attempt of the immune system to correct the inflammatory condition. Hsp70 can modulate inflammatory responses in models of arthritis, colitis and graft rejection, and the mechanisms underlying this effect are now being elucidated. Incubation with microbial Hsp70 was seen to induce tolerogenic dendritic cells (DCs) and to promote a suppressive phenotype in myeloid-derived suppressor cells and monocytes. These DC could induce regulatory T cells (Tregs), independently of the antigens they presented. Some Hsp70 family members are associated with autophagy, leading to a preferential uploading of Hsp70 peptides in MHC class II molecules of stressed cells. Henceforth, conserved Hsp70 peptides may be presented in these situations and constitute targets of Tregs, contributing to downregulation of inflammation. Finally, an interfering effect in multiple intracellular inflammatory signaling pathways is also known for Hsp70. Altogether it seems attractive to use Hsp70, or its derivative peptides, for modulation of inflammation. This is a physiological immunotherapy approach, without the immediate necessity of defining disease-specific auto-antigens. In this article, we present the evidence on anti-inflammatory effects of Hsp70 and discuss the need for experiments that will be crucial for the further exploration of the immunosuppressive potential of this protein.
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Affiliation(s)
- Thiago J Borges
- Faculdade de Biociências e Instituto de Pesquisas Biomédicas, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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12
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An artificial PAP gene breaks self-tolerance and promotes tumor regression in the TRAMP model for prostate carcinoma. Mol Ther 2011; 20:555-64. [PMID: 22086231 DOI: 10.1038/mt.2011.241] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Prostate cancer (PCa) is the most commonly diagnosed type of cancer in men in western industrialized countries. As a public health burden, the need for the invention of new cost-saving PCa immunotherapies is apparent. In this study, we present a DNA vaccine encoding for the prostate-specific antigen prostatic acid phosphatase (PAP) linked to the J-domain and the SV40 enhancer sequence. The PAP DNA vaccine induced a strong PAP-specific cellular immune response after electroporation (EP)-based delivery in C57BL/6 mice. Splenocytes from mice immunized with PAP recognized the naturally processed PAP epitopes, indicating that vaccination with the PAP-J gene broke its self-tolerance against PAP. Remarkably, DNA vaccination with PAP-J inhibited tumor growth in the Transgenic Adenocarcinoma of the Mouse Prostate (TRAMP) mouse model that closely resembled human PCa. Therefore, this study highlights a novel cancer immunotherapy approach with the potential to control PCa in clinical settings.
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13
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van den Engel NK, Rüttinger D, Rusan M, Kammerer R, Zimmermann W, Hatz RA, Winter H. Combination immunotherapy and active-specific tumor cell vaccination augments anti-cancer immunity in a mouse model of gastric cancer. J Transl Med 2011; 9:140. [PMID: 21859450 PMCID: PMC3169470 DOI: 10.1186/1479-5876-9-140] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Accepted: 08/22/2011] [Indexed: 12/22/2022] Open
Abstract
Background Active-specific immunotherapy used as an adjuvant therapeutic strategy is rather unexplored for cancers with poorly characterized tumor antigens like gastric cancer. The aim of this study was to augment a therapeutic immune response to a low immunogenic tumor cell line derived from a spontaneous gastric tumor of a CEA424-SV40 large T antigen (CEA424-SV40 TAg) transgenic mouse. Methods Mice were treated with a lymphodepleting dose of cyclophosphamide prior to reconstitution with syngeneic spleen cells and vaccination with a whole tumor cell vaccine combined with GM-CSF (a treatment strategy abbreviated as LRAST). Anti-tumor activity to subcutaneous tumor challenge was examined in a prophylactic as well as a therapeutic setting and compared to corresponding controls. Results LRAST enhances tumor-specific T cell responses and efficiently inhibits growth of subsequent transplanted tumor cells. In addition, LRAST tended to slow down growth of established tumors. The improved anti-tumor immune response was accompanied by a transient decrease in the frequency and absolute number of CD4+CD25+FoxP3+ T cells (Tregs). Conclusions Our data support the concept that whole tumor cell vaccination in a lymphodepleted and reconstituted host in combination with GM-CSF induces therapeutic tumor-specific T cells. However, the long-term efficacy of the treatment may be dampened by the recurrence of Tregs. Strategies to counteract suppressive immune mechanisms are required to further evaluate this therapeutic vaccination protocol.
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Affiliation(s)
- Natasja K van den Engel
- Department of Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University, Munich, Germany.
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Li T, Li WY, Bai HL, Ma HB, Zhang H, Zhu JM, Li XH, Huang HY, Ma YF, Ji XY. The genetic profiling of preferentially expressed genes in murine splenic CD8α+ dendritic cells. Immunol Res 2011; 51:80-96. [PMID: 21814860 DOI: 10.1007/s12026-011-8237-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In the murine splenocytes, CD8α+ dendritic cells (abbreviated as 8+DC) and CD8α- dendritic cells (abbreviated as 8-DC) are identified with some vague features for each of them. 8+DCs but not 8-DCs cross-prime cytotoxic T cells in vivo. We aim to distinguish the two subtypes of DC based on gene expression profiling. Suppressive subtractive hybridization was undertaken to get differentially expressed genes from such subtracted cDNA library specific to 8+DC. A total of 114 sequences from the subtracted cDNA library specific to 8+DC library were analyzed. Most of them are known proteins, but some of them were novel, either totally novel genes or homologs to known genes, but with novel exon. About 55 probably novel exons were discovered, and 11 exons had longer length than those in gene bank. The clones 12, 44, 79, and 110 have no match with known sequences in gene bank. Then, semi-quantitative PCR was done to compare the expression of the enriched sequences between 8+DC and 8-DC. About 14 genes are differentially expressed in 8+DC. Therefore, SSH is an effective method to clone differentially expressed genes for 8+DC compared to 8-DC.
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Affiliation(s)
- Tao Li
- Henan Provincial Key Laboratory for Cellular and Molecular Immunology, School of Medicine, Henan University, 1000 Jinming-Dadao Ave, Kai-Feng, Henan 475004, China
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15
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Wei J, Waithman J, Lata R, Mifsud NA, Cebon J, Kay T, Smyth MJ, Sadler AJ, Chen W. Influenza A infection enhances cross-priming of CD8+ T cells to cell-associated antigens in a TLR7- and type I IFN-dependent fashion. THE JOURNAL OF IMMUNOLOGY 2010; 185:6013-22. [PMID: 20956347 DOI: 10.4049/jimmunol.1002129] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The initiation of antitumor immunity relies on dendritic cells (DCs) to cross-present cell-associated tumor Ag to CD8(+) T cells (T(CD8+)) due to a lack of costimulatory molecules on tumor cells. Innate danger signals have been demonstrated to enhance cross-priming of T(CD8+) to soluble as well as virally encoded Ags; however, their effect on enhancing T(CD8+) cross-priming to cell genome-encoded Ags remains unknown. Furthermore, influenza A virus (IAV) has not been shown to enhance antitumor immunity. Using influenza-infected allogeneic cell lines, we show in this study that T(CD8+) responses to cell-associated Ags can be dramatically enhanced due to enhanced T(CD8+) expansion. This enhanced cross-priming in part involves TLR7- but not TLR3-mediated sensing of IAV and is entirely dependent on MyD88 and IFN signaling pathways. We also showed that the inflammasome-induced IL-1 and IFN-γ did not play a role in enhancing cross-priming in our system. We further demonstrated in our ex vivo system that CD8(+) DCs are the only APCs able to prime TCR-transgenic T(CD8+). Importantly, plasmacytoid DCs and CD8(-) DCs were both able to enhance such priming when provided in coculture. These observations suggest that IAV infection of tumor cells may facilitate improved cross-presentation of tumor Ags and may be used to augment clinical vaccine efficacy.
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Affiliation(s)
- Joe Wei
- Ludwig Institute for Cancer Research, Austin Health, Heidelberg, Melbourne, Victoria, Australia
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16
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Wieland A, Riedl P, Reimann J, Schirmbeck R. Silencing an immunodominant epitope of hepatitis B surface antigen reveals an alternative repertoire of CD8 T cell epitopes of this viral antigen. Vaccine 2009; 28:114-9. [DOI: 10.1016/j.vaccine.2009.09.096] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2009] [Revised: 08/28/2009] [Accepted: 09/23/2009] [Indexed: 10/20/2022]
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17
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Brosi H, Reiser M, Rajasalu T, Spyrantis A, Oswald F, Boehm BO, Schirmbeck R. Processing in the endoplasmic reticulum generates an epitope on the insulin A chain that stimulates diabetogenic CD8 T cell responses. THE JOURNAL OF IMMUNOLOGY 2009; 183:7187-95. [PMID: 19890053 DOI: 10.4049/jimmunol.0901573] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
RIP-B7.1 mice express the costimulator molecule B7.1 (CD80) on pancreatic beta cells and are a well-established model for studying de novo induction of diabetogenic CD8 T cells. Immunization of RIP-B7.1 mice with preproinsulin (ppins)-encoding plasmid DNA efficiently induces experimental autoimmune diabetes (EAD). EAD is associated with an influx of CD8 T cells specific for the K(b)/A(12-21) epitope into the pancreatic islets and the subsequent destruction of beta cells. In this study, we used this model to investigate how ppins-derived Ags are expressed and processed to prime diabetogenic, K(b)/A(12-21)-specific CD8 T cells. Targeting the K(b)/A(12-21) epitope, the insulin A chain, or the ppins to the endoplasmic reticulum (ER) (but not to the cytosol and/or nucleus) efficiently elicited K(b)/A(12-21)-specific CD8 T cell responses. The K(b)/A(12-21) epitope represents the COOH terminus of the ppins molecule and, hence, did not require COOH-terminal processing before binding its restriction element in the ER. However, K(b)/A(12-21)-specific CD8 T cells were also induced by COOH-terminally extended ppins-specific polypeptides expressed in the ER, indicating that the epitope position at the COOH terminus is less important for its diabetogenicity than is targeting the Ag to the ER. The K(b)/A(12-21) epitope had a low avidity for K(b) molecules. When epitopes of unrelated Ags were coprimed at the same site of Ag delivery, "strong" K(b)-restricted (but not D(b)-restricted) CD8 T cell responses led to the suppression of K(b)/A(12-21)-specific CD8 T cell priming and reduced EAD. Thus, direct expression and processing of the "weak" K(b)/A(12-21) epitope in the ER favor priming of autoreactive CD8 T cells.
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Affiliation(s)
- Helen Brosi
- Department of Internal Medicine I, University Hospital of Ulm, Ulm D-89081, Germany
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18
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Riedl P, Wieland A, Lamberth K, Buus S, Lemonnier F, Reifenberg K, Reimann J, Schirmbeck R. Elimination of Immunodominant Epitopes from Multispecific DNA-Based Vaccines Allows Induction of CD8 T Cells That Have a Striking Antiviral Potential. THE JOURNAL OF IMMUNOLOGY 2009; 183:370-80. [DOI: 10.4049/jimmunol.0900505] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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19
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Wieland A, Denzel M, Schmidt E, Kochanek S, Kreppel F, Reimann J, Schirmbeck R. Recombinant complexes of antigen with stress proteins are potent CD8 T-cell-stimulating immunogens. J Mol Med (Berl) 2008; 86:1067-79. [PMID: 18551265 DOI: 10.1007/s00109-008-0371-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Revised: 05/09/2008] [Accepted: 05/19/2008] [Indexed: 11/29/2022]
Abstract
Heat shock proteins (Hsp) of the Hsp70/90 families facilitate cellular immune responses to antigenic peptides or proteins bound to them and have therefore been used as vaccine vehicles. We developed an expression system in which chimeric proteins with an Hsp-capturing, viral J domain fused to diverse antigen-encoding sequences form stable complexes with eukaryotic (Hsp70, Hsp73) or bacterial (DnaK) stress proteins and accumulate to high steady-state levels. J domains from different species (viruses/SV40, bacteria/Chlamydia trachomatis or plants/Arabidopsis thaliana) efficiently capture murine or human stress proteins in this system, thus making different J domains available for vaccine production. A novel expression and purification method was developed to produce native Hsp/antigen complexes in transfectants. These purified Hsp/antigen complexes efficiently elicited antigen-specific CD8 T cell responses in mice when delivered as vaccines without adjuvants. In situ complex formation of antigen with Hsp was critical for CD8 T cell priming. Because the described expression system supports the flexible design of multivalent vaccines, it is an attractive strategy to elicit CD8 T cell responses either to recombinant proteins or to selected antigenic domains of these molecules.
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Affiliation(s)
- Andreas Wieland
- Department of Internal Medicine I, University of Ulm, Robert Koch Strasse 8, 89081 Ulm, Germany
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20
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Kamiguchi K, Torigoe T, Fujiwara O, Ohshima S, Hirohashi Y, Sahara H, Hirai I, Kohgo Y, Sato N. Disruption of the association of 73 kDa heat shock cognate protein with transporters associated with antigen processing (TAP) decreases TAP-dependent translocation of antigenic peptides into the endoplasmic reticulum. Microbiol Immunol 2008; 52:94-106. [DOI: 10.1111/j.1348-0421.2008.00017.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Brämswig KH, Knittelfelder R, Gruber S, Untersmayr E, Riemer AB, Szalai K, Horvat R, Kammerer R, Zimmermann W, Zielinski CC, Scheiner O, Jensen-Jarolim E. Immunization with mimotopes prevents growth of carcinoembryonic antigen positive tumors in BALB/c mice. Clin Cancer Res 2008; 13:6501-8. [PMID: 17975163 DOI: 10.1158/1078-0432.ccr-07-0692] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE The carcinoembryonic antigen (CEA) is a glycoprotein that is overexpressed in nearly 50% of all human and veterinarian tumors. At present, anti-CEA antibodies are being tested in clinical studies as passive immunotherapeutics. This study aims to establish an active immunotherapy for the poorly immunogenic CEA glycoprotein by generating antigen surrogates. EXPERIMENTAL DESIGN We used the monoclonal anti-CEA antibody Col-1 and the biopanning method to generate peptide mimics (mimotopes) of the Col-1 epitope. The peptide showing the highest specificity and mimicry was synthesized as an octameric multiple antigenic mimotope (MAM). Subsequently, immunogenicity of the selected mimotope was examined in BALB/c mice. We assessed antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity mediated by the induced antibodies on CEA-expressing HT29 tumor cells. Furthermore, after immunization, the BALB/c mice were transplanted s.c. with Meth-A/CEA tumor cells. RESULTS When BALB/c mice were immunized with this MAM, they generated a specific humoral immune response against CEA. The mimotope-induced polyclonal and poly-isotypic antibodies induced antibody-dependent cellular cytotoxicity and complement-dependent cytotoxicity in vitro. Furthermore, when MAM-immunized mice were transplanted s.c. with Meth-A/CEA cells expressing human CEA, a suppressed tumor growth was observed. CONCLUSION From our results, we can conclude that the Col-1 epitope of the glycoprotein CEA can be translated into an immunogenic peptide mimic. The mimotope-induced antibodies recognize CEA and do effectively inhibit growth of CEA-positive tumors. Based on these finding, we suggest that the generated mimotopes are candidates for active immunotherapy of CEA-expressing tumors.
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Affiliation(s)
- Kira H Brämswig
- Department of Pathophysiology, Medical University Vienna, Vienna, Austria
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22
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Kettner S, Kalthoff F, Graf P, Priller E, Kricek F, Lindley I, Schweighoffer T. EWI-2/CD316 is an inducible receptor of HSPA8 on human dendritic cells. Mol Cell Biol 2007; 27:7718-26. [PMID: 17785435 PMCID: PMC2169036 DOI: 10.1128/mcb.00180-07] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The activation of dendritic cells is marked by changes both on their cell surfaces and in their functions. We define EWI-2/CD316 as an early activation marker of dendritic cells upregulated by Toll-like receptor ligands clearly before CD86 and CD83. By expression cloning, human heat shock protein A8 (HSPA8), a member of the hsp70 family, was identified as the ligand for EWI-2. Soluble EWI-2 bound both to cells expressing HSPA8 and also to immobilized HSPA8 protein. Although heat shock proteins are evolutionarily well conserved, other members of this class, including human hsp60 and mycobacterial hsp65, did not bind to EWI-2. The ligation of EWI-2 enhanced the CCL21/SLC-dependent migration of activated mature dendritic cells but attenuated their antigen-specific stimulatory capacities. Important functions of recently activated dendritic cells are thus critically modulated by the newly discovered HSPA8-EWI-2 interaction.
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Affiliation(s)
- Sandra Kettner
- Novartis Institutes for Biomedical Research Vienna, A-1230 Vienna, Austria
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23
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Schirmbeck R, Riedl P, Kupferschmitt M, Wegenka U, Hauser H, Rice J, Kröger A, Reimann J. Priming Protective CD8 T Cell Immunity by DNA Vaccines Encoding Chimeric, Stress Protein-Capturing Tumor-Associated Antigen. THE JOURNAL OF IMMUNOLOGY 2006; 177:1534-42. [PMID: 16849460 DOI: 10.4049/jimmunol.177.3.1534] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
DNA vaccines encoding heat shock protein (hsp)-capturing, chimeric peptides containing antigenic determinants of the tumor-associated Ag (TAA) gp70 (an envelope protein of endogenous retrovirus) primed stable, specific, and tumor-protective CD8 T cell immunity. Expression of gp70 transcripts was detectable in most normal tissues but was particularly striking in some (but not all) tumor cell lines tested (including the adenocarcinoma cell line CT26). An approximately 200 residue gp70 fragment or its L(d)-binding antigenic AH1 peptide cloned in-frame behind an hsp-capturing (cT(272)) or noncapturing (T(60)) N-terminal large SV40 tumor Ag sequence was expressed as either hsp-binding or -nonbinding chimeric Ags. Only hsp-capturing, chimeric fusion proteins were expressed efficiently in transfected cell lines and primed TAA-specific CD8 T cell immunity. This immunity mediated protection in the CT26 and mKSA models. A vaccination strategy based on delivering antigenic, hsp-associated TAA fragments can thus prime protective CD8 T cell immunity even if these TAA are of low intrinsic immunogenicity.
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MESH Headings
- Adenocarcinoma/immunology
- Adenocarcinoma/prevention & control
- Animals
- Antigens, Neoplasm/administration & dosage
- Antigens, Neoplasm/biosynthesis
- Antigens, Neoplasm/genetics
- Antigens, Neoplasm/immunology
- CD8-Positive T-Lymphocytes/immunology
- Cancer Vaccines/administration & dosage
- Cancer Vaccines/genetics
- Cancer Vaccines/immunology
- Cell Line
- Cell Line, Tumor
- Coculture Techniques
- Colonic Neoplasms/immunology
- Colonic Neoplasms/prevention & control
- Female
- Glycoproteins/administration & dosage
- Glycoproteins/biosynthesis
- Glycoproteins/genetics
- Glycoproteins/immunology
- Heat-Shock Proteins/administration & dosage
- Heat-Shock Proteins/genetics
- Heat-Shock Proteins/immunology
- Lymphoma, T-Cell/immunology
- Lymphoma, T-Cell/prevention & control
- Mammary Neoplasms, Experimental/immunology
- Mammary Neoplasms, Experimental/prevention & control
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mutant Chimeric Proteins/administration & dosage
- Mutant Chimeric Proteins/genetics
- Mutant Chimeric Proteins/immunology
- Peptide Fragments/administration & dosage
- Peptide Fragments/genetics
- Peptide Fragments/immunology
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/immunology
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24
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Nöckel J, van den Engel NK, Winter H, Hatz RA, Zimmermann W, Kammerer R. Characterization of gastric adenocarcinoma cell lines established from CEA424/SV40 T antigen-transgenic mice with or without a human CEA transgene. BMC Cancer 2006; 6:57. [PMID: 16536871 PMCID: PMC1421424 DOI: 10.1186/1471-2407-6-57] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2006] [Accepted: 03/14/2006] [Indexed: 01/07/2023] Open
Abstract
Background Gastric carcinoma is one of the most frequent cancers worldwide. Patients with gastric cancer at an advanced disease stage have a poor prognosis, due to the limited efficacy of available therapies. Therefore, the development of new therapies, like immunotherapy for the treatment of gastric cancer is of utmost importance. Since the usability of existing preclinical models for the evaluation of immunotherapies for gastric adenocarcinomas is limited, the goal of the present study was to establish murine in vivo models which allow the stepwise improvement of immunotherapies for gastric cancer. Methods Since no murine gastric adenocarcinoma cell lines are available we established four cell lines (424GC, mGC3, mGC5, mGC8) from spontaneously developing tumors of CEA424/SV40 T antigen (CEA424/Tag) mice and three cell lines derived from double-transgenic offsprings of CEA424/Tag mice mated with human carcinoembryonic antigen (CEA)-transgenic (CEA424/Tag-CEA) mice (mGC2CEA, mGC4CEA, mGC11CEA). CEA424/Tag is a transgenic C57BL/6 mouse strain harboring the Tag under the control of a -424/-8 bp CEA gene promoter which leads to the development of invasive adenocarcinoma in the glandular stomach. Tumor cell lines established from CEA424/Tag-CEA mice express the well defined tumor antigen CEA under the control of its natural regulatory elements. Results The epithelial origin of the tumor cells was proven by morphological criteria including the presence of mucin within the cells and the expression of the cell adhesion molecules EpCAM and CEACAM1. All cell lines consistently express the transgenes CEA and/or Tag and MHC class I molecules leading to their susceptibility to lysis by Tag-specific CTL in vitro. Despite the presentation of CTL-epitopes derived from the transgene products the tumor cell lines were tumorigenic when grafted into C57BL/6, CEA424/Tag or CEA424/Tag-CEA-transgenic hosts and no significant differences in tumor take and tumor growth were observed in the different hosts. Although no spontaneous tumor rejection was observed, vaccination of C57BL/6 mice with lysates from gastric carcinoma cell lines protected C57BL/6 mice from tumor challenge, demonstrating the tumorigenicity of the tumor cell lines in nontransgenic mice of the H-2b haplotype. Conclusion These tumor cell lines grafted in different syngeneic hosts should prove to be very useful to optimize immunotherapy regimens to be finally tested in transgenic animals developing primary gastric carcinomas.
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Affiliation(s)
- Jessica Nöckel
- Tumor Immunology Laboratory, LIFE-Center, Klinikum Grosshadern, Ludwig-Maximilians-University, Marchioninistrasse 23, 81377 Munich, Germany
- Department of Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University, 81377 Munich, Germany
| | - Natasja K van den Engel
- Department of Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University, 81377 Munich, Germany
| | - Hauke Winter
- Department of Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University, 81377 Munich, Germany
| | - Rudolf A Hatz
- Department of Surgery, Klinikum Grosshadern, Ludwig-Maximilians-University, 81377 Munich, Germany
| | - Wolfgang Zimmermann
- Tumor Immunology Laboratory, LIFE-Center, Klinikum Grosshadern, Ludwig-Maximilians-University, Marchioninistrasse 23, 81377 Munich, Germany
| | - Robert Kammerer
- Tumor Immunology Laboratory, LIFE-Center, Klinikum Grosshadern, Ludwig-Maximilians-University, Marchioninistrasse 23, 81377 Munich, Germany
- Institute for Molecular Immunology, GSF National Research Center for the Environment and Health, 81377 Munich, Germany
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25
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Affiliation(s)
- Min Yu
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261 USA
| | - Olivera J. Finn
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261 USA
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26
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Zeh HJ, Lotze MT. Addicted to death: invasive cancer and the immune response to unscheduled cell death. J Immunother 2005; 28:1-9. [PMID: 15614039 DOI: 10.1097/00002371-200501000-00001] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The development of an invasive cancer involves a progressive switch from predominantly apoptotic (scheduled) to necrotic (unscheduled) tumor cell death. This switch is associated with chronic and increasing release of intracellular factors that in turn promote reactive angiogenesis and stromal proliferation and mediates the disordered tumor microenvironment associated with local immune suppression. The authors review the relevant immunobiology of these factors, including the nuclear protein HMGB1; the products of purine metabolism (uric acid, ATP, and adenosine); the S100 family members; and the heat shock proteins, which we believe drive futile cycles of cell death followed by reparative cell growth. The authors also present a novel and provocative hypothesis that suggests that most of the derangements that we associate with progression of cancer and the associated immunologic consequences can indeed be ascribed to the consequences of disordered tumor cell death rather than cell growth. Thus the fundamental defect in invasive human cancers, in the authors' view, is not one of cell growth but rather one of disordered cell death, resulting in turn in a tumor microenvironment that encourages tumor growth, progression, and local immunosuppression, a condition the authors have termed "addicted to death." This new understanding could inform and drive the development of more effective biologic therapies for patients with cancer.
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Affiliation(s)
- Herbert J Zeh
- University of Pittsburgh School of Medicine Institute, Room 411, 300 Technology Drive, Pittsburgh, PA 15219, USA
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27
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Reimann J, Schirmbeck R. DNA vaccines expressing antigens with a stress protein-capturing domain display enhanced immunogenicity. Immunol Rev 2004; 199:54-67. [PMID: 15233726 DOI: 10.1111/j.0105-2896.2004.00136.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An expression system for DNA vaccines is described, in which a fusion protein with an N-terminal, viral J-domain that captures heat-shock proteins (Hsps) is translated in-frame with C-terminal antigen-encoding sequences (of various lengths and origins). The system supports enhanced expression of chimeric antigens (of >800 residues in length) with an extended half life (>8 h). When used as a DNA vaccine, it delivers antigen together with the intrinsic adjuvant activity provided by bound Hsps. We describe the design of vectors for DNA vaccination that support the expression of different immunogenic domains of different origins as large, Hsp-capturing chimeric fusion antigens. The immunogenicity of the antigens produced by this expression system (when it is built into DNA vaccines) has been characterized in detail, with particular emphasis on priming CD8+ T-cell responses. We also discuss areas of vaccine research to which the new technology may provide useful contributions.
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Affiliation(s)
- Jörg Reimann
- Institute for Medical Microbiology and Immunology, University of Ulm, Germany.
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28
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Chen K, Lu J, Wang L, Gan YH. Mycobacterial heat shock protein 65 enhances antigen cross-presentation in dendritic cells independent of Toll-like receptor 4 signaling. J Leukoc Biol 2003; 75:260-6. [PMID: 14597728 DOI: 10.1189/jlb.0703341] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Heat shock proteins (HSP) have been shown to enhance antigen processing and presentation through their association with antigenic peptides and delivery of these moieties into major histocompatibility complex class I pathways. In this study, mycobacterial Hsp65 is demonstrated to have the ability to help cross-present an exogenous protein by dendritic cells (DC) to CD8 T cells without the need for complex formation between Hsp65 and the protein. This ability of Hsp65 to enhance cross-presentation is independent of its weak stimulatory effect on DC, the latter seen only after prolonged incubation. When the effect of lipopolysaccharide contamination is abrogated, Hsp65 is unable to activate Toll-like receptor (TLR)4 in the presence of CD14 and MD2. This accounts for the inability of Hsp65 to drive maturation of DC and shows that Hsp65 is not a potent stimulator of DC. Thus, Hsp65 enhances the cross-presentation of a soluble, free antigen by DC, independent of TLR4 signaling and up-regulation of costimulatory molecules.
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Affiliation(s)
- Kang Chen
- Department of Biochemistry, Faculty of Medicine, National University of Singapore, Singapore 117597.
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29
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Schirmbeck R, Fissolo N, Chaplin P, Reimann J. Enhanced priming of multispecific, murine CD8+ T cell responses by DNA vaccines expressing stress protein-binding polytope peptides. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2003; 171:1240-6. [PMID: 12874211 DOI: 10.4049/jimmunol.171.3.1240] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A polytope DNA vaccine (pCI/pt10) was used that encodes within a 106-residue sequence 10-well characterized epitopes binding MHC class I molecules encoded by the K, D, or L locus (of H-2(d), H-2(b), and H-2(k) haplotype mice). The pCI/pt10 DNA vaccine efficiently primed all four K(b)/D(b)-restricted CD8(+) T cell responses in H-2(b) mice, but was deficient in stimulating most CD8(+) T cell responses in H-2(d) mice. Comparing CD8(+) T cell responses elicited with the pCI/pt10 DNA vaccine in L(d+) BALB/c and L(d-) BALB/c(dm2) (dm2) mice revealed that L(d)-restricted CD8(+) T cell responses down-regulated copriming of CD8(+) T cell responses to other epitopes regardless of their restriction or epitope specificity. Although the pt10 vaccine could thus efficiently co prime multispecific CD8(+) T cell responses, this priming was impaired by copriming L(d)-restricted CD8(+) T cell responses. When the pt10 sequence was fused to a 77-residue DnaJ-homologous, heat shock protein 73-binding domain (to generate a 183-residue cT(77)-pt10 fusion protein), expression and immunogenicity (for CD8(+) T cells) of the chimeric Ag were greatly enhanced. Furthermore, priming of multispecific CD8(+) T cell responses was readily elicited even under conditions in which the suppressive, L(d)-dependent immunodominance operated. The expression of polytope vaccines as chimeric peptides that endogenously capture stress proteins during in situ production thus facilitates copriming of CD8(+) T cell populations with a diverse repertoire.
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MESH Headings
- Animals
- Antigen Presentation/genetics
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Carrier Proteins/administration & dosage
- Carrier Proteins/genetics
- Carrier Proteins/immunology
- Carrier Proteins/metabolism
- Chickens
- Cytotoxicity, Immunologic/genetics
- Down-Regulation/genetics
- Down-Regulation/immunology
- Epitopes, T-Lymphocyte/immunology
- Epitopes, T-Lymphocyte/metabolism
- Female
- Genetic Vectors
- H-2 Antigens/biosynthesis
- H-2 Antigens/immunology
- H-2 Antigens/metabolism
- HSC70 Heat-Shock Proteins
- HSP70 Heat-Shock Proteins
- Histocompatibility Antigen H-2D
- Injections, Intramuscular
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Mutant Strains
- Peptide Fragments/administration & dosage
- Peptide Fragments/genetics
- Peptide Fragments/immunology
- Peptide Fragments/metabolism
- Protein Binding/genetics
- Protein Binding/immunology
- Recombinant Fusion Proteins/administration & dosage
- Recombinant Fusion Proteins/genetics
- Recombinant Fusion Proteins/immunology
- Recombinant Fusion Proteins/metabolism
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- Tumor Cells, Cultured
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, DNA/metabolism
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Affiliation(s)
- Reinhold Schirmbeck
- Institute of Medical Microbiology and Immunology, University of Ulm, Ulm, Germany
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30
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Abstract
The role of host defense in cancer is highly variable. Although there are cases where spontaneous cures of cancer appear to be mediated by immunologic mechanisms, malignant disease generally progresses even in patients where tumor-specific immunity can be demonstrated. It is apparent that there are complex interactions between tumor cells and dendritic cells, the dominant antigen-presenting cells of the immune system. Through their inhibitory actions upon dendritic cells, tumor cells can negatively regulate priming of tumor-specific immunity. Recent work has also shown that dendritic cells have direct cytotoxic effects upon tumor cells. These interactions may impact on the efficacy of current strategies using dendritic cell-based vaccines for tumor immunotherapy.
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Affiliation(s)
- Hearn Jay Cho
- Department of Medicine, Weill Medical College of Cornell University, New York, NY 10021, USA.
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31
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Purcell AW, Todd A, Kinoshita G, Lynch TA, Keech CL, Gething MJ, Gordon TP. Association of stress proteins with autoantigens: a possible mechanism for triggering autoimmunity? Clin Exp Immunol 2003; 132:193-200. [PMID: 12699405 PMCID: PMC1808692 DOI: 10.1046/j.1365-2249.2003.02153.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Patterns of autoantibody production are diagnostic of many autoimmune disorders; the recent observation of additional autospecificities towards stress-induced proteins may also provide insight into the mechanisms by which such responses arise. Grp78 (also known as BiP) is a target of autoaggressive B and T cell responses in our murine model of anti-Ro (SS-A) autoimmunity and also in rheumatoid arthritis. In this report we demonstrate reciprocal intermolecular spreading occurs between Ro52 and Grp78 in immunized mice, reflecting physiological association of these molecules in vivo. Moreover, we provide direct biochemical evidence that Grp78 associates with the clinically relevant autoantigen, Ro52 (SS-A). Due to the discrete compartmentalization of Ro52 (nucleocytoplasmic) and Grp78 (endoplasmic reticulum; ER) we propose that association of these molecules occurs either in apoptotic cells, where they have been demonstrated indirectly to co-localize in discrete apoptotic bodies, or in B cells themselves where both Ro52 and Grp78 are known to bind to immunoglobulin heavy chains. Tagging of molecules by association with Grp78 may facilitate receptor mediated phagocytotsis of the complex; we show evidence that exogenous Grp78 can associate with cell surface receptors on a subpopulation of murine splenocytes. Given the likelihood that Grp78 will associate with viral glycoproteins in the ER it is possible that it may become a bystander target of the spreading antiviral immune response. Thus, we propose a model whereby immunity elicited towards Grp78 leads to the selection of responses towards the Ro polypeptides and the subsequent cascade of responses observed in human disease.
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Affiliation(s)
- A W Purcell
- Department of Microbiology and Immunology, University of Melbourne, Victoria, Australia.
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32
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Abstract
Dendritic cells (DCs) are potent antigen presenting cells that exist in virtually every tissue, and from which they capture antigens and migrate to secondary lymphoid organs where they activate naïve T cells. Although DCs are normally present in extremely small numbers in the circulation, recent advances in DC biology have allowed the development of methods to generate large numbers of these cells in vitro. Because of their immunoregulatory capacity, vaccination with tumor antigen-presenting DCs has been proposed as a treatment modality for cancer. In animal models, vaccination with DCs pulsed with tumor peptides, lysates, or RNA or loaded with apoptotic/necrotic tumor cells could induce significant antitumor CTL responses and antitumor immunity. However, the results from early clinical trails pointed to a need for additional improvement of DC-based vaccines before they could be considered as practical alternatives to the existing cancer treatment strategies. In this regard, subsequent studies have shown that DCs that express transgenes encoding tumor antigens are more potent primers of antitumor immunity both in vitro and in vivo than DCs simply pulsed with tumor peptides. Furthermore, DCs that have been engineered to express certain cytokines or chemokines can display a substantially improved maturation status, capacity to migrate to secondary lymphoid organs in vivo, and abilities to stimulate tumor-specific T cell responses and induce tumor immunity in vivo. In this review we also discuss a number of factors that are important considerations in designing DC vaccine strategies, including (i) the type and concentrations of tumor peptides used for pulsing DCs; (ii) the timing and intervals for DC vaccination/boostable data on DC vaccination portends bright prospects for this approach to tumor immune therapy, either alone or in conjunction with other therapies.
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Affiliation(s)
- Xueshu Zhang
- Research Unit, Health Research Division, Saskatchewan Cancer Agency, Department of Oncology, Saskatoon, Saskatchewan, Canada
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33
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Noessner E, Gastpar R, Milani V, Brandl A, Hutzler PJS, Kuppner MC, Roos M, Kremmer E, Asea A, Calderwood SK, Issels RD. Tumor-derived heat shock protein 70 peptide complexes are cross-presented by human dendritic cells. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 169:5424-32. [PMID: 12421917 DOI: 10.4049/jimmunol.169.10.5424] [Citation(s) in RCA: 213] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Our study demonstrates that tumor-derived heat shock protein (HSP)70 chaperones a tyrosinase peptide and mediates its transfer to human immature dendritic cells (DCs) by receptor-dependent uptake. Human tumor-derived HSP70 peptide complexes (HSP70-PC) thus have the immunogenic potential to instruct DCs to cross-present endogenously expressed, nonmutated, and tumor antigenic peptides that are shared among tumors of the melanocytic lineage for T cell recognition. T cell stimulation by HSP70-instructed DCs is dependent on the Ag bound to HSP70 in that only DCs incubated with HSP70-PC purified from tyrosinase-positive (HSP70-PC/tyr(+)) but not from tyrosinase-negative (HSP70-PC/tyr(-)) melanoma cells resulted in the specific activation of the HLA-A*0201-restricted tyrosinase peptide-specific cytotoxic T cell clone. HSP70-PC-mediated T cell stimulation is very efficient, delivering the tyrosinase peptide at concentrations as low as 30 ng/ml of HSP70-PC for T cell recognition. Receptor-dependent binding of HSP70-PC and active cell metabolism are prerequisites for MHC class I-restricted cross-presentation and T cell stimulation. T cell stimulation does not require external DC maturation signals (e.g., exogenously added TNF-alpha), suggesting that signaling DC maturation is an intrinsic property of the HSP70-PC itself and related to receptor-mediated binding. The cross-presentation of a shared human tumor Ag together with the exquisite efficacy are important new aspects for HSP70-based immunotherapy in clinical anti-cancer vaccination strategies, and suggest a potential extension of HSP70-based vaccination protocols from a patient-individual treatment modality to its use in an allogeneic setting.
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Affiliation(s)
- Elfriede Noessner
- Clinical Cooperation Group Hyperthermie, Institute of Molecular Immunology, GSF National Research Center for Environment and Health, 81377 Munich, Germany.
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34
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Tang ZH, Qiu WH, Wu GS, Yang XP, Zou SQ, Qiu FZ. The immunotherapeutic effect of dendritic cells vaccine modified with interleukin-18 gene and tumor cell lysate on mice with pancreatic carcinoma. World J Gastroenterol 2002; 8:908-12. [PMID: 12378640 PMCID: PMC4656585 DOI: 10.3748/wjg.v8.i5.908] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To estimate the effect of a therapeutic vaccine against pancreatic carcinoma based on dendritic cell (DC) vaccine modified with tumor lysate and Interleukin-18 gene.
METHODS: The BALB/C mice model of pancreatic carcinoma was induced with DMBA. DC vaccine was constructed through pulsed with tumor lysate and transfected by the recombinant adenoviral vector encoding IL-18 gene. The immnotherapeutic effects of DC vaccine on mice with pancreatic carcinoma were assessed (divided into DC-IL18-Lysate group, DC-Lysate group, DC-IL18 group, DC group, PBS group).
RESULTS: After vaccination of the DC vaccine, the concentration of IL-18 and IFN-γ were 2161 ± 439 ng·L-1 and 435 ± 72 ng·L-1 in DC-IL18-Lysate group and there was significant difference compared with other groups (P < 0.01). After vaccination of the DC vaccine, the transplanted tumors were observed on 30 d in DC-Lysate groups, on 16 d in DC-IL18 groups, on 3 d in control group, but mice remained tumor-free for at least 50 d in DC-IL18-Lysate group and there was significant difference between DC-IL18-Lysate group and other groups (P < 0.01). The median survival exceeds 62 d in DC-IL18-Lysate group. But the median survival was 48.6 d in DC-Lysate group, 33 d in DC-IL18 group, 17 d in PBS group. The survival period was obviously prolonged in DC-IL18-Lysate group than in other groups (P < 0.05, P < 0.01). The weight of pancreatic tumor was 0.22 ± 0.083 g in DC-IL18-Lysate group, 1.45 ± 0.74 g in DC-Lysate group, 1.89 ± 1.34 g in DC-IL18 group, 3.0 ± 1.6 g in DC group, 2.9 ± 2.0 g in PBS group and the weight of tumor obviously reduced in DC-IL18-Lysate group than in other groups (P < 0.05, P < 0.01).
CONCLUSION: DC vaccine modified with tumor lysate and Interleukin-18 gene can induce a specific and effective immune response against pancreatic carcinoma cell.
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Affiliation(s)
- Zhao-Hui Tang
- Department of General Surgery of Tong Ji Hospital, Wuhan 430030, Hubei Province, China.
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Schirmbeck R, Reimann J. Alternative processing of endogenous or exogenous antigens extends the immunogenic, H-2 class I-restricted peptide repertoire. Mol Immunol 2002; 39:249-59. [PMID: 12200054 DOI: 10.1016/s0161-5890(02)00105-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We investigated the murine, MHC class I-restricted cytotoxic T lymphocyte (CTL) response to a viral antigen delivered by different vaccination strategies to either the endogenous, or an alternative exogenous processing pathway. The immunization techniques used primed distinct (though overlapping) repertoires of CTL epitopes. In vitro studies revealed evidence for the generation of immunogenic, L(d)- and K(b)-binding peptides from endocytosed, exogenous antigen by alternative (endolysosomal) processing. Endogenous antigens expressed by DNA vaccines as a stress protein-associated fusion proteins gains access from the cytosol to endolysosomal processing. Hence, exogenous as well as endogenous protein antigens can gain access to alternative processing pathways and can give rise to an extended repertoire of antigenic epitopes. These studies indicate novel ways for the rational design of vaccine candidates that can prime CTL responses.
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Affiliation(s)
- Reinhold Schirmbeck
- Institute of Medical Microbiology and Immunology, University of Ulm, Helmholtzstr 8/1, Albert Einstein Allee 11, D-89081, Ulm, Germany
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Riedl P, El-Kholy S, Reimann J, Schirmbeck R. Priming biologically active antibody responses against an isolated, conformational viral epitope by DNA vaccination. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2002; 169:1251-60. [PMID: 12133946 DOI: 10.4049/jimmunol.169.3.1251] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The immunodominant, conformational "a" determinant of hepatitis B surface Ag (HBsAg) elicits Ab responses. We selectively expressed the Ab-binding, glycosylated, native a determinant (residue 120-147) of HBsAg in a fusion protein containing C-terminally the HBsAg fragment SII (residue 80-180) fused to a SV40 T-Ag-derived hsp73-binding 77 aa (T(77)) or non-hsp-binding 60 aa (T(60)) N terminus. A DNA vaccine encoding non-hsp-binding secreted T(60)-SII fusion protein-stimulated murine Ab responses with a similar efficacy as a DNA vaccine encoding the secreted, native, small HBsAg. A DNA vaccine encoding hsp73-binding, intracellular T(77)-SII fusion protein-stimulated murine Ab responses less efficiently but comparable to a DNA vaccine encoding the intracellular, native, large HBsAg. HBsAg-specific Abs elicited by either the T(60)-SII-expressing or the T(77)-SII-expressing DNA vaccine suppressed HBsAg antigenemia in transgenic mice that produce HBsAg from a transgene in the liver; hence, a biologically active B cell response cross-reacting with the native, viral envelope epitope was primed by both DNA vaccine constructs. HBsAg-specific Ab and CTL responses were coprimed when an S(20-50) fragment (containing the immunodominant, L(d)-binding epitope S(28-39)) of HBsAg was fused C-terminally to the pCI/T(77)-SII sequence (pCI/T(77)-SII-L(d) DNA vaccine). Chimeric, polyepitope DNA vaccines encoding conformational, Ab-binding epitopes and MHC class I-binding epitopes can thus efficiently deliver antigenic information to different compartments of the immune system in an immunogenic way.
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Affiliation(s)
- Petra Riedl
- Institute of Medical Microbiology and Immunology, University of Ulm, Ulm, Germany
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Schirmbeck R, Kwissa M, Fissolo N, Elkholy S, Riedl P, Reimann J. Priming polyvalent immunity by DNA vaccines expressing chimeric antigens with a stress protein-capturing, viral J-domain. FASEB J 2002; 16:1108-10. [PMID: 12039856 DOI: 10.1096/fj.01-0993fje] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The N-terminal domain of large tumor antigens (T-Ag) of polyomaviruses forms a DnaJ-like structure with a conserved J domain that associates with constitutively expressed stress protein heat shock protein (hsp)73. Mutant (but not wild-type) SV40 T-Ag show stable, ATP-dependent binding to the stress protein hsp73 when expressed in cells from different vertebrate tissues. Intracellular T/hsp73 complexes accumulate to high steady-state levels. From this observation, we designed a vector system that supports stable expression of a large variety of hsp73-capturing, chimeric antigens containing an N-terminal, T-Ag-derived domain, and different C-terminal antigenic domains from unrelated antigens. Most antigenic domains tested could be stably expressed only in eukaryotic cells as fusion protein/hsp73 complexes. The N-terminal 77 residues representing the J domain of T-Ag were required for stable hsp73 binding and efficient expression of chimeric antigens. Hsp73-bound chimeric antigens expressed by DNA vaccines showed strikingly enhanced immunogenicity evident in humoral (antibody) and cellular cytolytic T lymphocytes (CTL) responses. The described system supports efficient expression of chimeric, polyvalent antigens and their codelivery with hsp73 as a "natural adjuvant" for enhanced immunogenicity for T and B cells.
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Affiliation(s)
- Reinhold Schirmbeck
- Institute of Medical Microbiology and Immunology, University of Ulm, Ulm, Germany.
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