51
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Locher C, Conforti R, Aymeric L, Ma Y, Yamazaki T, Rusakiewicz S, Tesnière A, Ghiringhelli F, Apetoh L, Morel Y, Girard JP, Kroemer G, Zitvogel L. Desirable cell death during anticancer chemotherapy. Ann N Y Acad Sci 2010; 1209:99-108. [PMID: 20958322 DOI: 10.1111/j.1749-6632.2010.05763.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The concept of immunogenic chemotherapy that has recently emerged relies upon the capacity of a cytotoxic compound to trigger a cell-death modality. This modality elicits cross-priming by dendritic cells of tumor antigen-specific T cells that will contribute to the tumoricidal activity of the compound and protect the host against relapse. In contrast, most anticancer drugs elicit nonimmunogenic apoptosis that is not accompanied with an immunizing property. This review will discuss some molecular and metabolic changes required at the level of the tumor that must engage key pathways at the level of the host for the induction of Tc1 polarized-protective T cell responses during chemotherapy. We will summarize the immune adjuvants that can boost the immunogenicity of cell death to augment the efficacy of chemotherapy.
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Affiliation(s)
- Clara Locher
- Institut National de la Santé et de la Recherche Médicale, U1015, Villejuif, France
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52
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Dabbs RA, Wyatt AR, Yerbury JJ, Ecroyd H, Wilson MR. Extracellular Chaperones. Top Curr Chem (Cham) 2010. [PMID: 21516385 DOI: 10.1007/128_2010_85] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The maintenance of the levels and correct folding state of proteins (proteostasis) is a fundamental prerequisite for life. Life has evolved complex mechanisms to maintain proteostasis and many of these that operate inside cells are now well understood. The same cannot yet be said of corresponding processes in extracellular fluids of the human body, where inappropriate protein aggregation is known to underpin many serious diseases such as Alzheimer's disease, type II diabetes and prion diseases. Recent research has uncovered a growing family of abundant extracellular chaperones in body fluids which appear to selectively bind to exposed regions of hydrophobicity on misfolded proteins to inhibit their toxicity and prevent them from aggregating to form insoluble deposits. These extracellular chaperones are also implicated in clearing the soluble, stabilized misfolded proteins from body fluids via receptor-mediated endocytosis for subsequent lysosomal degradation. Recent work also raises the possibility that extracellular chaperones may play roles in modulating the immune response. Future work will better define the in vivo functions of extracellular chaperones in proteostasis and immunology and pave the way for the development of new treatments for serious diseases.
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53
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Ma CL, Wang GB, Gu RG, Wang F. Construction and characterization of calreticulin-HBsAg fusion gene recombinant adenovirus expression vector. World J Gastroenterol 2010; 16:3078-82. [PMID: 20572313 PMCID: PMC2890950 DOI: 10.3748/wjg.v16.i24.3078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To generate recombinant adenoviral vector containing calreticulin (CRT)-hepatitis B surface antigen (HBsAg) fusion gene for developing a safe, effective and HBsAg-specific therapeutic vaccine.
METHODS: CRT and HBsAg gene were fused using polymerase chain reaction (PCR), endonuclease digestion and ligation methods. The fusion gene was cloned into pENTR/D-TOPO transfer vector after the base pairs of DNA (CACC) sequence was added to the 5′ end. Adenoviral expression vector containing CRT-HBsAg fusion gene was constructed by homologous recombinantion. The human embryo kidney (HEK) 293A cells were transfected with linearized DNA plasmid of the recombinant adenoviral vector to package and amplify recombinant adenovirus. The recombinant adenovirus titer was characterized using the end-dilution assay. The expression of the CRT/HBsAg fusion protein in Ad-CRT/HBsAg infected 293A cells was detected by Western blotting.
RESULTS: The CRT-HBsAg fusion gene was characterized by PCR and sequencing and its length and sequence were confirmed to be accurate. The CRT-HBsAg fusion gene recombinant pENTR/D-TOPO transfer vector was constructed. The recombinant adenoviral vector, Ad-CRT/HBsAg, was generated successfully. The titer of Ad-CRT/HBsAg was characterized as 3.9 × 1011 pfu/mL. The CRT-HBsAg fusion protein was expressed by HEK 293A cells correctly.
CONCLUSION: CRT/HBsAg fusion gene recombinant replication-defective adenovirus expression vector is constructed successfully and this study has provided an experimental basis for further studies of Hepatitis B virus gene therapy.
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54
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Henderson B, Pockley AG. Molecular chaperones and protein-folding catalysts as intercellular signaling regulators in immunity and inflammation. J Leukoc Biol 2010; 88:445-62. [PMID: 20445014 DOI: 10.1189/jlb.1209779] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
This review critically examines the hypothesis that molecular chaperones and protein-folding catalysts from prokaryotes and eukaryotes can be secreted by cells and function as intercellular signals, principally but not exclusively, for leukocytes. A growing number of molecular chaperones have been reported to function as ligands for selected receptors and/or receptors for specific ligands. Molecular chaperones initially appeared to act primarily as stimulatory signals for leukocytes and thus, were seen as proinflammatory mediators. However, evidence is now emerging that molecular chaperones can have anti-inflammatory actions or, depending on the protein and concentration, anti- and proinflammatory functions. Recasting the original hypothesis, we propose that molecular chaperones and protein-folding catalysts are "moonlighting" proteins that function as homeostatic immune regulators but may also under certain circumstances, contribute to tissue pathology. One of the key issues in the field of molecular chaperone biology relates to the role of microbial contaminants in their signaling activity; this too will be evaluated critically. The most fascinating aspect of molecular chaperones probably relates to evidence for their therapeutic potential in human disease, and ongoing studies are evaluating this potential in a range of clinical settings.
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Affiliation(s)
- Brian Henderson
- Department of Microbial Diseases, UCL-Eastman Dental Institute, University College London, 256 Gray's Inn Rd., London, WC1X 8LD, UK.
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55
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Kropp LE, Garg M, Binder RJ. Ovalbumin-derived precursor peptides are transferred sequentially from gp96 and calreticulin to MHC class I in the endoplasmic reticulum. THE JOURNAL OF IMMUNOLOGY 2010; 184:5619-27. [PMID: 20410492 DOI: 10.4049/jimmunol.0902368] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Cellular peptides generated by proteasomal degradation of proteins in the cytosol and destined for presentation by MHC class I (MHC-I) are associated with several chaperones. Heat shock proteins 70, 90, and the TCP-1 ring complex have been implicated as important cytosolic players for chaperoning these peptides. In this study, we report that gp96 and calreticulin are essential for chaperoning peptides in the endoplasmic reticulum. Importantly, we demonstrate that cellular peptides are transferred sequentially from gp96 to calreticulin and then to MHC-I forming a relay line. Disruption of this relay line by removal of gp96 or calreticulin prevents the binding of peptides by MHC-I and hence presentation of the MHC-I-peptide complex on the cell surface. Our results are important for understanding how peptides are processed and trafficked within the endoplasmic reticulum before exiting in association with MHC-I H chains and beta2-microglobulin as a trimolecular complex.
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Affiliation(s)
- Laura E Kropp
- Department of Immunology, University of Pittsburgh, Pittsburgh, PA 15261, USA
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56
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Abstract
Advances in the understanding of the immunoregulatory functions of dendritic cells (DCs) in animal models and humans have led to their exploitation as anticancer vaccines. Although DC-based immunotherapy has proven clinically safe and efficient to induce tumor-specific immune responses, only a limited number of objective clinical responses have been reported in cancer patients. These relatively disappointing results have prompted the evaluation of multiple approaches to improve the efficacy of DC vaccines. The topic of this review focuses on personalized DC-based anticancer vaccines, which in theory have the potential to present to the host immune system the entire repertoire of antigens harbored by autologous tumor cells. We also discuss the implementation of these vaccines in cancer therapeutic strategies, their limitations and the future challenges for effective immunotherapy against cancer.
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Affiliation(s)
- Nona Janikashvili
- Department of Pediatrics, Steele Children’s Research Center, Arizona 85724, USA
| | - Nicolas Larmonier
- Department of Pediatrics, Steele Children’s Research Center, Arizona 85724, USA
- Department of Immunobiology, BIO5 Institute & Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, USA
| | - Emmanuel Katsanis
- Department of Pediatrics, Steele Children’s Research Center, Arizona 85724, USA
- Department of Immunobiology, BIO5 Institute & Arizona Cancer Center, University of Arizona, Tucson, AZ 85724, USA
- University of Arizona, Department of Pediatrics, 1501 N Campbell Ave, PO Box 245073, Tucson, AZ 85724-85073, USA
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57
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Pekáriková A, Sánchez D, Palová-Jelínková L, Simsová M, Benes Z, Hoffmanová I, Drastich P, Janatková I, Mothes T, Tlaskalová-Hogenová H, Tucková L. Calreticulin is a B cell molecular target in some gastrointestinal malignancies. Clin Exp Immunol 2009; 160:215-22. [PMID: 20030668 DOI: 10.1111/j.1365-2249.2009.04085.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Calreticulin, upon translocation to the cell surface, plays a critical role in the recognition of tumour cells and in experimentally induced cellular anti-tumour immunity. However, less is known about anti-calreticulin antibodies and their role in malignancies. Using enzyme-linked immunosorbent assay (ELISA), we found immunoglobulin (Ig)A and/or IgG anti-calreticulin antibodies in sera of approximately 63% of patients with hepatocellular carcinoma (HCC), 57% of patients with colorectal adenocarcinoma (CRA) and 47% of patients with pancreatic adenocarcinoma (PACA), while healthy controls, patients with viral hepatitis C and with chronic pancreatitis reached only 2%, 20% and 31% seropositivity, respectively. We found significantly elevated mean levels of IgA anti-calreticulin antibodies (P < 0.001) in patients with HCC (78.7 +/- 52.3 AU, mean +/- standard deviation), PACA (66.5 +/- 30.9 AU) and CRA (61.8 +/- 25.8 AU) when compared to healthy controls (41.4 +/- 19.2 AU). Significantly elevated mean levels of IgG anti-calreticulin antibodies (P < 0.001) were detected in patients with HCC (121.9 +/- 94.2 AU), gall bladder adenocarcinoma (118.4 +/- 80.0 AU) and PACA (88.7 +/- 55.6 AU) when compared to healthy controls (56.7 +/- 22.9 AU). Pepscan analysis revealed a large number of antigenic epitopes of calreticulin recognized by both IgA and IgG antibodies of patients with HCC and PACA, indicating robust systemic immune response. Moreover, significantly elevated levels of antibodies against peptide KGEWKPRQIDNP (P < 0.001) in these patients, tested by ELISA, confirmed the distinct character of antibody reactivity against calreticulin. The high occurrence and specificity of serum anti-calreticulin autoantibodies in the majority of patients with some gastrointestinal malignancies provide the evidence for their possible clinical relevance.
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Affiliation(s)
- A Pekáriková
- Department of Immunology, Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Prague, Czech Republic
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58
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Development of the hsp110–heparanase vaccine to enhance antitumor immunity using the chaperoning properties of hsp110. Mol Immunol 2009; 47:298-301. [DOI: 10.1016/j.molimm.2009.09.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Revised: 09/08/2009] [Accepted: 09/08/2009] [Indexed: 11/20/2022]
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59
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Locher C, Rusakiewicz S, Tesnière A, Ghiringhelli F, Apetoh L, Kroemer G, Zitvogel L. Witch Hunt against Tumor Cells Enhanced by Dendritic Cells. Ann N Y Acad Sci 2009; 1174:51-60. [DOI: 10.1111/j.1749-6632.2009.04940.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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60
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Fu H, Liu C, Flutter B, Tao H, Gao B. Calreticulin maintains the low threshold of peptide required for efficient antigen presentation. Mol Immunol 2009; 46:3198-206. [PMID: 19748124 DOI: 10.1016/j.molimm.2009.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2009] [Revised: 08/11/2009] [Accepted: 08/12/2009] [Indexed: 11/26/2022]
Abstract
Calreticulin (CRT) plays a critical role in MHC class I antigen processing and elicits peptide-specific CD8(+) T cell responses against tumours when administered with peptides. However, how CRT contributes to class I antigen processing and the mechanism of its adjuvant effect in anti-tumour responses, remain to be elucidated. Here we show that reduced class I expression in CRT deficient cells can be restored by the direct delivery of peptides into the ER or by incubation at low temperature. CRT deficient cells exhibited a TAP-deficient phenotype in terms of class I assembly, without loss of TAP expression or functionality. Furthermore, a higher concentration of antigen in the cytosol is required for specific T cell stimulation, suggesting that CRT has a functional role in the maintenance of the low peptide concentration threshold required in the ER for efficient antigen presentation. In the absence of CRT, ERp57 is up-regulated, which indicates that they collaborate with each other in class I antigen processing.
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Affiliation(s)
- Hongmei Fu
- Rheumatology Unit, UCL Institute of Child Health, University College London, London, UK
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61
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Abstract
Heat shock proteins (HSPs) are immunogenic, with the specificity of the immune response provided by the peptides that they chaperone. Binding of cell surface receptors by HSPs is central to the elicitation of the innate and adaptive immune responses obtained after vaccination and also plays a physiologic role in cross-priming. These effects of HSPs have been exploited in prophylaxis and therapy of cancer and infectious disease. The data obtained from murine studies have been translated into ongoing clinical trials of cancer of which the most recent results are provided here.
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Affiliation(s)
- Robert J Binder
- Center for Immunotherapy of Cancer and Infectious Diseases, Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut 06030-1920, USA.
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62
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Lévy F, Colombetti S. Promises and Limitations of Murine Models in the Development of Anticancer T-Cell Vaccines. Int Rev Immunol 2009; 25:269-95. [PMID: 17169777 DOI: 10.1080/08830180600992407] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Murine models have been instrumental in defining the basic mechanisms of antitumor immunity. Most of these mechanisms have since been shown to operate in humans as well. Based on these similarities, active vaccination strategies aimed at eliciting antitumor T-cell responses have been elaborated and successfully implemented in various mouse models. However, the results of human antitumor vaccination trials have been rather disappointing thus far. This review summarizes the different experimental approaches used in mice to induce antitumor T-cell responses and identifies some critical parameters that should be considered when evaluating results from murine models.
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Affiliation(s)
- Frédéric Lévy
- Ludwig Institute for Cancer Research, Lausanne Branch, University of Lausanne, Epalinges, Switzerland.
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63
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Abstract
Heat shock protein 70 (HSP70) has gained plenty of attention because of its adjuvant capability to induce CD8(+) cytotoxic T lymphocyte and CD4(+) T-helper cell responses. We investigated the behavior of T-cell subsets stimulated with endotoxin-free HSP70 with respect to proliferation, cytokine expression, cytotoxicity against allogeneic B-lymphoblastoid cell line and K562 cells, as well as target-independent cytotoxicity. CD4(+) cells exhibited a strong increase in proliferation after stimulation with HSP70 (29%). In the presence of targets, a 35-fold up-regulation of granzyme B was observed after stimulation of CD4(+) T cells with HSP70 in combination with interleukin-7 (IL-7)/IL-12/IL-15. The target cell-independent secretion of granzyme B by CD4(+) cells was greatly augmented after stimulation with HSP70 plus IL-2 or IL-7/IL-12/IL-15. In this study, we showed that HSP70 is capable of inducing a cytotoxic response of T-helper cells in the absence of lipopolysaccharide. The granzyme B secretion and cytolytic activity of T-helper cells are induced in a target-independent way, whereas the cytotoxic activity of CD3(+) and CD8(+) T cells can be further enhanced in the presence of target cells. Our data provide novel insights into the role of extracellular HSP70 on T-cell immune response concerning the induction of target-independent T-helper cell cytotoxicity.
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64
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Low-dose radiation enhances therapeutic HPV DNA vaccination in tumor-bearing hosts. Cancer Immunol Immunother 2008; 58:737-48. [PMID: 18815785 DOI: 10.1007/s00262-008-0596-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Accepted: 09/10/2008] [Indexed: 10/21/2022]
Abstract
Current therapeutic approaches to treatment of patients with bulky cervical cancer are based on conventional in situ ablative modalities including cisplatin-based chemotherapy and radiation therapy. The 5-year survival of patients with nonresectable disease is dismal. Because over 99% of squamous cervical cancer is caused by persistent infection with an oncogenic strain of human papillomavirus (HPV), particularly type 16 and viral oncoproteins E6 and E7 are functionally required for disease initiation and persistence, HPV-targeted immune strategies present a compelling opportunity in which to demonstrate proof of principle. Sublethal doses of radiation and chemotherapeutic agents have been shown to have synergistic effect in combination with either vaccination against cancer-specific antigens, or with passive transfer of tumor-specific cytotoxic T lymphocytes (CTLs). Here, we explored the combination of low-dose radiation therapy with DNA vaccination with calreticulin (CRT) linked to the mutated form of HPV-16 E7 antigen (E7(detox)), CRT/E7(detox) in the treatment of E7-expressing TC-1 tumors. We observed that TC-1 tumor-bearing mice treated with radiotherapy combined with CRT/E7(detox) DNA vaccination generated significant therapeutic antitumor effects and the highest frequency of E7-specific CD8(+) T cells in the tumors and spleens of treated mice. Furthermore, treatment with radiotherapy was shown to render the TC-1 tumor cells more susceptible to lysis by E7-specific CTLs. In addition, we observed that treatment with radiotherapy during the second DNA vaccination generated the highest frequency of E7-specific CD8(+) T cells in the tumors and spleens of TC-1 tumor-bearing mice. Finally, TC-1 tumor-bearing mice treated with the chemotherapy in combination with radiation and CRT/E7(detox) DNA vaccination generate significantly enhanced therapeutic antitumor effects. The clinical implications of the study are discussed.
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65
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Kim SG, Park MY, Kim CH, Sohn HJ, Kim HS, Park JS, Kim HJ, Oh ST, Kim TG. Modification of CEA with both CRT and TAT PTD induces potent anti-tumor immune responses in RNA-pulsed DC vaccination. Vaccine 2008; 26:6433-40. [PMID: 18812201 DOI: 10.1016/j.vaccine.2008.08.072] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Revised: 08/20/2008] [Accepted: 08/25/2008] [Indexed: 12/11/2022]
Abstract
Carcinoembryonic antigen (CEA) is expressed on human colon carcinomas, is well characterized, and continues to be a promising target for cancer immunotherapy in humans. To enhance the immunogenecity of CEA, we developed a fusion gene (CRT-TAT-DeltaCEA) of the TAT protein transduction domain (PTD) and calreticulin (CRT) with human CEA devoid of its signal sequences (DeltaCEA) and evaluated anti-tumor immunity using RNA-pulsed dendritic cell (DC) vaccination. Mice vaccinated with DC by electroporation with mRNA encoding TAT-DeltaCEA (DC/TAT-DeltaCEA) and CRT-DeltaCEA (DC/CRT-DeltaCEA) had enhanced induction of tumor-specific cytotoxic T lymphocyte (CTL) and increased numbers of IFN-gamma-secreting T cells by ELISPOT, as compared to mice vaccinated with DC/DeltaCEA. DC/CRT-DeltaCEA and DC/TAT-DeltaCEA vaccines preferentially stimulated CD4+ and CD8+ T cells, respectively. The DC vaccine by electroporation with mRNA encoding CRT-TAT-DeltaCEA (DC/CRT-TAT-DeltaCEA) enhanced both CD4+ and CD8+ T cells. DC/CRT-TAT-DeltaCEA had the additional effects of CRT and TAT PTD and enhanced the anti-tumor effect against CEA-expressing tumors compared to DC/CRT-DeltaCEA or DC/TAT-DeltaCEA. These findings suggest that modification of CEA with both CRT and TAT PTD induces potent anti-tumor immune responses in RNA-pulsed DC vaccination and may be a useful approach for DC-based immunotherapy.
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Affiliation(s)
- Sung-Guh Kim
- Department of Microbiology and Immunology, Kang-Nam St. Mary's Hospital, The Catholic University of Korea, 505 Banpo-Dong, Seocho-Gu, Seoul 137-701, Republic of Korea
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66
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Hodge JW, Guha C, Neefjes J, Gulley JL. Synergizing radiation therapy and immunotherapy for curing incurable cancers. Opportunities and challenges. ONCOLOGY (WILLISTON PARK, N.Y.) 2008; 22:1064-70; discussion 1075, 1080-1, 1084. [PMID: 18777956 PMCID: PMC3474236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The combination of radiation therapy and immunotherapy holds particular promise as a strategy for cancer therapeutics. Evidence suggests that immunotherapy is most beneficial alone when employed early in the disease process or in combination with standard therapies (eg, radiation) later in the disease process. Indeed, radiation may act synergistically with immunotherapy to enhance immune responses, inhibit immunosuppression, and/or alter the phenotype of tumor cells, thus rendering them more susceptible to immune-mediated killing. As monotherapies, both immunotherapy and radiation may be insufficient to eliminate tumor masses. However, following immunization with a cancer vaccine, the destruction of even a small percentage of tumor cells by radiation could result in crosspriming and presentation of tumor antigens to the immune system, thereby potentiating antitumor responses. Learning how to exploit radiation-induced changes to tumor-cell antigens, and how to induce effective immune responses to these cumulatively immunogenic stimuli, is an exciting frontier in cancer therapy research. This review examines mechanisms by which many forms of radiation therapy can induce or augment antitumor immune responses as well as preclinical systems demonstrating that immunotherapy can be effectively combined with radiation therapy. Finally, we review current clinical trials where standard-of-care radiation therapy is being combined with immunotherapy.
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Affiliation(s)
- James W Hodge
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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67
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Sánchez D, Palová-Jelínková L, Felsberg J, Simsová M, Pekáriková A, Pecharová B, Swoboda I, Mothes T, Mulder CJJ, Benes Z, Tlaskalová-Hogenová H, Tucková L. Anti-calreticulin immunoglobulin A (IgA) antibodies in refractory coeliac disease. Clin Exp Immunol 2008; 153:351-9. [PMID: 18637103 DOI: 10.1111/j.1365-2249.2008.03701.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Refractory coeliac disease (RCD) is a very rare and dangerous form of CD, in which gluten-free diet loses its therapeutic effect and the damage of intestinal mucosa persists. Because of the adherence to the diet, serological markers of CD [immunoglobulin A (IgA) antibodies against gliadin, tissue transglutaminase (tTG) and endomysium] are often missing in RCD patients. We found substantially elevated levels of IgA anti-calreticulin (CRT) antibodies in the sera of almost all RCD patients tested. These sera were negative for IgA antibodies to gliadin and tTG and only some of them showed IgA antibodies to enterocytes. Analysis of patients' IgA reactivity to CRT fragments (quarters and halves) by Western blotting revealed differences in the specificity of IgA antibodies between RCD and CD patients. We therefore used the Pepscan technique with synthetic overlapping decapeptides of CRT to characterize antigenic epitopes recognized by serum IgA antibodies of RCD patients. Employing this method we demonstrated several dominant antigenic epitopes recognized by IgA antibodies of RCD patients on the CRT molecule. Epitope GVTKAAEKQMKD was recognized predominantly by serum IgA of RCD patients. Our results suggest that testing for serum IgA antibodies against CRT and its selected peptide could be a very useful tool in RCD differential diagnosis.
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Affiliation(s)
- D Sánchez
- Department of Immunology, Institute of Microbiology, Czech Academy of Sciences, Prague, Czech Republic.
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68
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Abstract
Heat-shock proteins (HSPs), or stress proteins, are highly conserved and present in all organisms and in all cells of all organisms. Selected HSPs, also known as chaperones, play crucial roles in folding/unfolding of proteins, assembly of multiprotein complexes, transport/sorting of proteins into correct subcellular compartments, cell-cycle control and signaling, and protection of cells against stress/apoptosis. More recently, HSPs have been implicated in antigen presentation with the role of chaperoning and transferring antigenic peptides to the class I and class II molecules of the major histocompatibility complexes. In addition, extracellular HSPs can stimulate professional antigen-presenting cells of the immune system, such as macrophages and dendritic cells. HSPs constitute a large family of proteins that are often classified based on their molecular weight: hsp10, hsp40, hsp60, hsp70, hsp90, etc. This unit contains a table that lists common HSPs and summarizes their characteristics including (a) name, (b) subcellular localization, (c) known function, (d) chromosome assignment, (e) brief comments, and (f) references.
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Affiliation(s)
- Zihai Li
- University of Connecticut School of Medicine, Farmington, Connecticut, USA
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69
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Abstract
Almost 60 years ago, the pioneering work of George Klein and others showed that cancers could be made targets for the immune system. Identification of the tumor targets, known as tumor antigens, became a focus in cancer biology that led to the discovery of the immunological properties of heat-shock proteins (HSPs) in 1986 by Pramod Srivastava and colleagues. Since then, the use of HSPs in the therapeutics of cancer and infectious disease in several clinical trials has been guided by our understanding of the role and effects of HSPs in adaptive and innate immune responses, investigated primarily in mice. This review will highlight the immunological properties of HSPs as we understand them today and review the clinical work on human cancers. Several Phase I and II clinical trials in different types of cancer that have been completed, as well as ongoing Phase III trials, will be summarized.
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Affiliation(s)
- Robert J Binder
- University of Pittsburgh, E1051, BSTWR, 200 Lothrop Street, Pittsburgh, PA 15261, USA.
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70
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Vangheluwe P, Raeymaekers L, Dode L, Wuytack F. Modulating sarco(endo)plasmic reticulum Ca2+ ATPase 2 (SERCA2) activity: cell biological implications. Cell Calcium 2008; 38:291-302. [PMID: 16105684 DOI: 10.1016/j.ceca.2005.06.033] [Citation(s) in RCA: 157] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2005] [Accepted: 06/28/2005] [Indexed: 11/20/2022]
Abstract
Of the three mammalian members belonging to the sarco(endo)plasmic reticulum Ca2+ ATPase (SERCA) family, SERCA2 is evolutionary the oldest and shows the most wide tissue-expression pattern. Two major SERCA2 splice variants are well-characterized: the muscle-specific isoform SERCA2a and the housekeeping isoform SERCA2b. Recently, several interacting proteins and post-translational modifications of SERCA2 were identified which may modulate the activity of the Ca2+ pump. This review aims to give an overview of the vast literature concerning the cell biological implications of the SERCA2 isoform diversity and the factors regulating SERCA2. Proteins reported to interact with SERCA2 from the cytosolic domain involve the anti-apoptotic Bcl-2, the insulin receptor substrates IRS1/2, the EF-hand Ca2+-binding protein S100A1 and acylphosphatase. We will focus on the very particular position of SERCA2 as an enzyme functioning in a thin, highly fluid, leaky and cholesterol-poor membrane. Possible differential interactions of SERCA2b and SERCA2a with calreticulin, calnexin and ERp57, which could occur within the lumen of the endoplasmic reticulum will be discussed. Reported post-translational modifications possibly affecting pump activity involve N-glycosylation, glutathionylation and Ca2+/calmodulin kinase II-dependent phosphorylation. Finally, the pronounced vulnerability to oxidative damage of SERCA2 appears to be pivotal in the etiology of various pathologies.
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Affiliation(s)
- Peter Vangheluwe
- Laboratory of Physiology, O.&N. Gasthuisberg, K.U. Leuven, Campus Gasthuisberg, Herestraat 49, B-3000 Leuven, Belgium
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71
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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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72
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Obeid M, Tesniere A, Panaretakis T, Tufi R, Joza N, van Endert P, Ghiringhelli F, Apetoh L, Chaput N, Flament C, Ullrich E, de Botton S, Zitvogel L, Kroemer G. Ecto-calreticulin in immunogenic chemotherapy. Immunol Rev 2008; 220:22-34. [PMID: 17979837 DOI: 10.1111/j.1600-065x.2007.00567.x] [Citation(s) in RCA: 169] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The conventional treatment of cancer relies upon radiotherapy and chemotherapy. Such treatments supposedly mediate their effects via the direct elimination of tumor cells. Nonetheless, there are circumstances in which conventional anti-cancer therapy can induce a modality of cellular demise that elicits innate and cognate immune responses, which in turn mediate part of the anti-tumor effect. Although different chemotherapeutic agents may kill tumor cells through an apparently homogeneous apoptotic pathway, they differ in their capacity to stimulate immunogenic cell death. We discovered that the pre-apoptotic translocation of intracellular calreticulin (endo-CRT) to the plasma membrane surface (ecto-CRT) is critical for the recognition and engulfment of dying tumor cells by dendritic cells. Thus, anthracyclines and gamma-irradiation that induce ecto-CRT cause immunogenic cell death, while other pro-apoptotic agents (such as mitomycin C and etoposide) induce neither ecto-CRT nor immunogenic cell death. Depletion of CRT abolishes the immunogenicity of cell death elicited by anthracyclines, while exogenous supply of CRT or enforcement of CRT exposure by pharmacological agents that favor CRT translocation can enhance the immunogenicity of cell death. For optimal anti-tumor vaccination and immunogenic chemotherapy, the same cells have to expose ecto-CRT and to succumb to apoptosis; if these events affect different cells, no anti-tumor immune response is elicited. These results may have far reaching implications for tumor immunology because (i) ecto-CRT exposure by tumor cells allows for the prediction of therapeutic outcome and because (ii) the re-establishment of ecto-CRT may ameliorate the efficacy of chemotherapy.
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73
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Pagh R, Duus K, Laursen I, Hansen PR, Mangor J, Thielens N, Arlaud GJ, Kongerslev L, Højrup P, Houen G. The chaperone and potential mannan-binding lectin (MBL) co-receptor calreticulin interacts with MBL through the binding site for MBL-associated serine proteases. FEBS J 2008; 275:515-26. [DOI: 10.1111/j.1742-4658.2007.06218.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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74
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Generation and characterization of a preventive and therapeutic HPV DNA vaccine. Vaccine 2007; 26:351-60. [PMID: 18096279 DOI: 10.1016/j.vaccine.2007.11.019] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2007] [Revised: 10/26/2007] [Accepted: 11/07/2007] [Indexed: 12/12/2022]
Abstract
Cervical cancer is one of the most common cancers in women worldwide. Persistent infection with human papillomavirus (HPV) is considered to be the etiological factor for cervical cancer. Therefore, an effective vaccine against HPV infections may lead to the control of cervical cancer. An ideal HPV vaccine should aim to generate both humoral immune response to prevent new infections as well as cell-mediated immunity to eliminate established infection or HPV-related disease. In the current study, we have generated a potential preventive and therapeutic HPV DNA vaccine using human calreticulin (CRT) linked to HPV16 early proteins, E6 and E7 and the late protein L2 (hCRTE6E7L2). We found that vaccination with hCRTE6E7L2 DNA vaccine induced a potent E6/E7-specific CD8+ T cell immune response, resulting in a significant therapeutic effect against E6/E7 expressing tumor cells. In addition, vaccination with hCRTE6E7L2 DNA generated significant L2-specific neutralizing antibody responses, protecting against pseudovirion infection. Thus, the hCRTE6E7L2 DNA vaccines are capable of generating potent preventive and therapeutic effects in vaccinated mice. Our data has significant clinical implications.
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Abstract
Apoptotic cell death is initiated by a morphologically homogenous entity that was considered to be non-immunogenic and non-inflammatory in nature. However, recent advances suggest that apoptosis, under certain circumstances, can be immunogenic. In particular, some characteristics of the plasma membrane, acquired at preapoptotic stage, can cause immune effectors to recognize and attack preapoptotic tumor cells. The signals that mediate the immunogenicity of tumor cells involve elements of the DNA damage response (such as ataxia telangiectasia mutated and p53 activation), elements of the endoplasmic reticulum stress response (such as eukaryotic initiation factor 2alpha phosphorylation), as well as elements of the apoptotic response (such as caspase activation). Depending on the signal-transduction pathway, tumor cells responding to chemotherapy or radiotherapy can express 'danger' and 'eat me' signals on the cell surface (such as NKG2D ligands, heat-shock proteins and calreticulin) or can secrete/release immunostimulatory factors (such as cytokines and high-mobility group box 1) to stimulate innate immune effectors. Likewise, the precise sequence of such events influences the 'decision' of the immune system to mount a cognate response or not. We therefore anticipate that the comprehension of the mechanisms governing the immunogenicity of cell death will have a profound impact on the design of anticancer therapies.
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76
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Hayashi E, Matsuzaki Y, Hasegawa G, Yaguchi T, Kurihara S, Fujita T, Kageshita T, Sano M, Kawakami Y. Identification of a Novel Cancer-Testis Antigen CRT2 Frequently Expressed in Various Cancers Using Representational Differential Analysis. Clin Cancer Res 2007; 13:6267-74. [DOI: 10.1158/1078-0432.ccr-07-1374] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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77
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Obeid M, Panaretakis T, Tesniere A, Joza N, Tufi R, Apetoh L, Ghiringhelli F, Zitvogel L, Kroemer G. Leveraging the immune system during chemotherapy: moving calreticulin to the cell surface converts apoptotic death from "silent" to immunogenic. Cancer Res 2007; 67:7941-4. [PMID: 17804698 DOI: 10.1158/0008-5472.can-07-1622] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In contrast to prior belief, tumor cell apoptosis is not necessarily silent but can be immunogenic. By tracing how anthracyclines and gamma-irradiation trigger immunogenic cell deaths, we found that they were causally connected to the exposure of calreticulin on the tumor cell surface, before apoptosis in the tumor cell itself occurred. Furthermore, we showed that calreticulin exposure was necessary and sufficient to increase proimmunogenic killing by other chemotherapies. Our findings suggest that calreticulin could serve as a biomarker to predict therapy-associated immune responses, and that tactics to expose calreticulin might improve the clinical efficacy of many cancer therapies.
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78
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Bak SP, Amiel E, Walters JJ, Berwin B. Calreticulin requires an ancillary adjuvant for the induction of efficient cytotoxic T cell responses. Mol Immunol 2007; 45:1414-23. [PMID: 17936359 DOI: 10.1016/j.molimm.2007.08.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2007] [Revised: 08/29/2007] [Accepted: 08/30/2007] [Indexed: 01/14/2023]
Abstract
Molecular chaperones stimulate the immune system to induce both protective immune responses and therapeutic tumor rejection. However, the underlying basis for this immunogenic activity is not well understood. A variety of chaperones, including calreticulin, hsp70 and grp94, function as vehicles to efficiently traffic associated peptides into professional antigen presenting cells. Importantly, these chaperones have also been proposed to function as adjuvants by stimulating the dendritic cell activation and co-stimulatory responses required to elicit peptide-specific CD8(+) T cell cytolytic activity. The efficacy of chaperone-mediated tumor rejection has been attributed to the ability of chaperones to function in both of these capacities. However, purified calreticulin has not previously been assessed for its ability to elicit DC maturation and, moreover, recent data indicates that it is not efficient at inducing Nf-kappaB activity which often accompanies or stimulates DC maturation. Here we use two complementary methods to produce endotoxin-free calreticulin and demonstrate that it does not measurably mature or activate dendritic cells both in vitro and in vivo. Additionally, a calreticulin/peptide complex required the addition of an exogenous adjuvant to elicit in vivo cytotoxic CD8(+) T cell responses. These data are discussed with respect to current models for chaperone-derived immune responses and in regard to rational vaccine design.
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Affiliation(s)
- S Peter Bak
- Department of Microbiology and Immunology, Dartmouth Medical School, Lebanon, NH 03755, USA
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79
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Gomez-Gutierrez JG, Elpek KG, Montes de Oca-Luna R, Shirwan H, Sam Zhou H, McMasters KM. Vaccination with an adenoviral vector expressing calreticulin-human papillomavirus 16 E7 fusion protein eradicates E7 expressing established tumors in mice. Cancer Immunol Immunother 2007; 56:997-1007. [PMID: 17146630 PMCID: PMC11030956 DOI: 10.1007/s00262-006-0247-2] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2006] [Accepted: 09/26/2006] [Indexed: 12/19/2022]
Abstract
BACKGROUND Cervical cancer remains a leading cause of cancer-related mortality in women, particularly in developing countries. The causal association between genital human papilloma virus (HPV) infection and cervical cancer has been firmly established, and the oncogenic potential of certain HPV types has been clearly demonstrated. Vaccines targeting the oncogenic proteins, E6 and E7 of HPV-16 and -18 are the focus of current vaccine development. Previous studies have shown that calreticulin (CRT) enhances the MHC class I presentation of linked peptide/protein and may serve as an effective vaccination strategy for antigen-specific cancer treatment. METHODS Two replication-deficient adenoviruses, one expressing HPV-16 E7 (Ad-E7) and the other expressing CRT linked to E7 (Ad-CRT/E7), were assessed for their ability to induce cellular immune response and tested for prophylactic and therapeutic effects in an E7-expressing mouse tumor model. RESULTS Vaccination with Ad-CRT/E7 led to a dramatic increase in E7-specific T cell proliferation, interferon (IFN)-gamma-secretion, and cytotoxic activity. Immunization of mice with Ad-CRT/E7 was effective in preventing E7-expressing tumor growth, as well as eradicating established tumors with long-term immunological memory. CONCLUSION Vaccination with an adenoviral vector expressing CRT-E7 fusion protein represents an effective strategy for immunotherapy of cervical cancer in rodents, with possible therapeutic potential in clinical settings.
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Affiliation(s)
- Jorge G. Gomez-Gutierrez
- Louisville, KY USA
- Department of Surgery, University of Louisville School of Medicine; James Graham Brown Cancer Center, 40292 Louisville, KY USA
- Facultad de Ciencias Biológicas, Departamanto de Microbiología e Inmunología, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, NL México
| | - Kutlu G. Elpek
- Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY USA
- Institute for Cellular Therapeutics, University of Louisville School of Medicine, Louisville, KY USA
| | - Roberto Montes de Oca-Luna
- Departamento de Histología, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, NL México
| | - Haval Shirwan
- Louisville, KY USA
- Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY USA
- Institute for Cellular Therapeutics, University of Louisville School of Medicine, Louisville, KY USA
- Microbiology and Immunology, University of Louisville School of Medicine; James Graham Brown Cancer Center, Louisville, KY USA
| | - H. Sam Zhou
- Louisville, KY USA
- Department of Medicine, University of Louisville School of Medicine; James Graham Brown Cancer Center, Louisville, KY USA
- Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY USA
- Microbiology and Immunology, University of Louisville School of Medicine; James Graham Brown Cancer Center, Louisville, KY USA
| | - Kelly M. McMasters
- Louisville, KY USA
- Department of Surgery, University of Louisville School of Medicine; James Graham Brown Cancer Center, 40292 Louisville, KY USA
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80
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Slack LK, Muthana M, Hopkinson K, Suvarna SK, Espigares E, Mirza S, Fairburn B, Pockley AG. Administration of the stress protein gp96 prolongs rat cardiac allograft survival, modifies rejection-associated inflammatory events, and induces a state of peripheral T-cell hyporesponsiveness. Cell Stress Chaperones 2007; 12:71-82. [PMID: 17441509 PMCID: PMC1852895 DOI: 10.1379/csc-237r.1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
High-dose gp96 has been shown to inhibit experimental autoimmune disease by a mechanism that appears to involve immunoregulatory CD4+ T cells. This study tested the hypothesis that high-dose gp96 administration modifies allograft rejection and associated inflammatory events. Wistar cardiac allografts were transplanted into Lewis recipient rats and graft function was monitored daily by palpation. Intradermal administration of gp96 purified from Wistar rat livers (100 microg) at the time of transplantation and 3 days later significantly prolonged allograft survival (14 vs 8 days in phosphate-buffered saline [PBS]-treated recipients; P = 0.009). Rejected allografts from gp96-treated animals were significantly less enlarged than allografts from their PBS-treated counterparts (2.8 vs 4.3 g; P < 0.004). Gp96 was also effective when administered on days 1 and 8 (13 vs 7 days), but not if it was derived from recipient (Lewis) liver tissue or administered on days 0, 3, and 6. In parallel studies, CD3+ T cells from gp96-treated untransplanted animals secreted less interleukin (IL)-4, IL-10, and interferon (IFN)-gamma after in vitro polyclonal stimulation than CD3+ T cells from PBS-treated animals. Gp96 administration might therefore influence the induction of immunity to coencountered antigenic challenges and inflammatory events by inducing what appears to be a state of peripheral T-cell hyporesponsiveness.
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Affiliation(s)
- Laura K Slack
- Immunobiology Research Unit, School of Medicine and Biomedical Sciences (University of Sheffield), L Floor, Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, UK
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81
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Purcell AW, McCluskey J, Rossjohn J. More than one reason to rethink the use of peptides in vaccine design. Nat Rev Drug Discov 2007; 6:404-14. [PMID: 17473845 DOI: 10.1038/nrd2224] [Citation(s) in RCA: 586] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The use of peptides as therapeutics is experiencing renewed enthusiasm owing to advances in delivery, stability and design. Moreover, there is a growing emphasis on the use of peptides in vaccine design as insights into tissue-specific processing of the immunogenic epitopes of proteins and the discovery of unusually long cytotoxic T-lymphocyte epitopes broaden the range of targets and give clues to enhancing peptide immunogenicity. Peptides can also be synthesized with known post-translational modifications and/or deliberately introduced protease-resistant peptide bonds to regulate their processing independent of tissue-specific proteolysis and to stabilize these compounds in vivo. We discuss the potential of peptide-based vaccines for the treatment of chronic viral diseases and cancer, and review recent developments in the field of peptide-based vaccines.
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Affiliation(s)
- Anthony W Purcell
- The Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Victoria 3010, Australia
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82
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Friedl J, Riss S, Stift A. Is immunotherapy a reasonable approach for the treatment of esophageal cancer? Eur Surg 2007. [DOI: 10.1007/s10353-007-0334-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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83
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Li G, Zeng Y, Chen X, Larmonier N, Sepassi M, Graner MW, Andreansky S, Brewer MA, Katsanis E. Human ovarian tumour-derived chaperone-rich cell lysate (CRCL) elicits T cell responses in vitro. Clin Exp Immunol 2007; 148:136-45. [PMID: 17349014 PMCID: PMC1868858 DOI: 10.1111/j.1365-2249.2007.03323.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Tumour-derived chaperone-rich cell lysate (CRCL), which is made up of numerous heat shock proteins, has been used successfully to generate tumour-specific T cell responses and protective immunity against a wide range of murine tumours. In this study, we have investigated the potency of human ovarian cancer-derived CRCL to activate dendritic cells (DC) and to generate tumour-specific T cells in vitro. CRCL was generated from primary ovarian cancers and SKOV3-A2, a HER2/neu, Wilm's tumour gene 1 (WT1) and human leucocyte antigen (HLA)-A2 positive human ovarian tumour cell line. Peripheral blood mononuclear cells from both HLA-A2(+) healthy donors and HLA-A2(+) ovarian cancer patients were stimulated weekly with autologous DC loaded with ovarian tumour-derived CRCL. After four to six stimulations in vitro, specific cytokine secretion and cytotoxicity were measured. CRCL promoted interleukin (IL)-12 secretion and enhanced the immunostimulatory capacity of DC. T cells from healthy controls and from ovarian cancer patients secreted higher amounts of interferon-gamma following in vitro restimulation with ovarian cancer-derived CRCL than with HER2/neu or WT1 peptide-pulsed DC. We were also able to generate cytotoxic T lymphocyte activity against cancer-specific antigens such as HER2/neu and WT1 from all healthy donors, but from only one of the four ovarian cancer patients with bulky disease. These preliminary results substantiate further the concept that CRCL may prove to be a potent adjuvant for women suffering from ovarian cancer and that this personalized vaccine may be a promising approach for active immunotherapy.
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Affiliation(s)
- G Li
- Department of Pediatrics, University of Arizona, Tucson, AZ 85724,USA
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84
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Sandhu N, Duus K, Jørgensen CS, Hansen PR, Bruun SW, Pedersen LØ, Højrup P, Houen G. Peptide binding specificity of the chaperone calreticulin. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2007; 1774:701-13. [PMID: 17499031 DOI: 10.1016/j.bbapap.2007.03.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2006] [Revised: 03/28/2007] [Accepted: 03/29/2007] [Indexed: 10/23/2022]
Abstract
Calreticulin is a molecular chaperone with specificity for polypeptides and N-linked monoglucosylated glycans. In order to determine the specificity of polypeptide binding, the interaction of calreticulin with polypeptides was investigated using synthetic peptides of different length and composition. A large set of available synthetic peptides (n=127) was tested for binding to calreticulin and the results analysed by multivariate data analysis. The parameter that correlated best with binding was hydrophobicity while beta-turn potential disfavoured binding. Only hydrophobic peptides longer than 5 amino acids showed binding and a clear correlation with hydrophobicity was demonstrated for oligomers of different hydrophobic amino acids. Insertion of hydrophilic amino acids in a hydrophobic sequence diminished or abolished binding. In conclusion our results show that calreticulin has a peptide-binding specificity for hydrophobic sequences and delineate the fine specificity of calreticulin for hydrophobic amino acid residues.
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Affiliation(s)
- Noreen Sandhu
- Department of Autoimmunology, Statens Serum Institut, Artillerivej 5, DK-2300 Copenhagen, Denmark
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85
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Abstract
Heat-shock or stress proteins (HSPs) are intracellular molecules that are expressed under cellular stress and have housekeeping and cytoprotective functions. Many of them act also as molecular chaperones, assisting the correct folding, stabilization, and translocation of proteins. In pathological situations, such as necrotic cell death, they can be released into the extracellular environment complexed with intact or fragmented cellular proteins. Evidence is now accumulating to indicate that, under certain circumstances, these complexes can contribute to induction of autoimmunity by receptor-mediated activation of the innate immune response (signaling the "danger") and by participation in the presentation of autoantigens for the adaptive immune response (acting as natural adjuvants). In addition, the conservation of HSPs through prokaryotes and eukaryotes, together with the increased production of host and microbial HSPs at the site of infection, has led to the proposition that these proteins may provide a link between infection and autoimmunity. This review outlines the mechanisms for the potential involvement of chaperones in the induction of autoimmune disease.
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Affiliation(s)
- John G Routsias
- Department of Pathophysiology, School of Medicine, University of Athens, 11527 Athens, Greece
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86
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Ohno M, Kitabatake N, Tani F. Functional region of mouse heat shock protein 72 for its binding to lymphoid neoplastic P388D1 cells. Mol Immunol 2007; 44:2344-54. [PMID: 17126904 DOI: 10.1016/j.molimm.2006.10.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2006] [Accepted: 10/20/2006] [Indexed: 10/23/2022]
Abstract
Extracellular heat shock proteins have been reported to participate in both innate and adaptive immune responses. We have found that recombinant mouse inducible heat shock protein 72 (Hsp72) bound to lymphoid neoplastic P388D1 cells. In the present study, we examined which region of mouse Hsp72 interacted with this cell line by using truncated variants that are sequentially lacking sections of the C-terminal region. The full-length mouse Hsp72 specifically bound to P388D1 cells, but not to mastocytoma P815 cells. Deletion of the C-terminal tail portion of mouse Hsp72 markedly decreased the binding to P388D1 cells and the sequential truncation of the C-terminal helical region led to a loss of binding activity. Specific binding was not observed for either the variant with a minimal substrate-binding structure or the ATP-binding domain alone. On the other hand, two truncated variants lacking the ATP-binding domain significantly bound to P388D1 cells. However, the variant lacking the substrate-binding domain did not show any binding to this cell line. These results suggest that the activity to bind P388D1 cells is attributable to the C-terminal region of mouse Hsp72 in combination with the substrate-binding domain. Interestingly, the binding of mouse Hsp72 to P388D1 cells was competed by the variant with the C-terminal flexible tail sequence, but not by the variant without that sequence. These competitive experiments imply that there may be at least two membrane receptors on P388D1 cells and also that both receptors may recognize the various structures in the C-terminal region of the Hsp70 family for regulation of innate immunity.
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Affiliation(s)
- Michiko Ohno
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Goka-sho, Uji, Kyoto 611-011, Japan
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87
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Mastrolorenzo A, Supuran CT, Zuccati G. The sexually transmitted papillomavirus infections: clinical manifestations, current and future therapies. Expert Opin Ther Pat 2007. [DOI: 10.1517/13543776.17.2.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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88
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Obeid M, Tesniere A, Ghiringhelli F, Fimia GM, Apetoh L, Perfettini JL, Castedo M, Mignot G, Panaretakis T, Casares N, Métivier D, Larochette N, van Endert P, Ciccosanti F, Piacentini M, Zitvogel L, Kroemer G. Calreticulin exposure dictates the immunogenicity of cancer cell death. Nat Med 2006; 13:54-61. [PMID: 17187072 DOI: 10.1038/nm1523] [Citation(s) in RCA: 2268] [Impact Index Per Article: 126.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Accepted: 11/20/2006] [Indexed: 02/07/2023]
Abstract
Anthracyclin-treated tumor cells are particularly effective in eliciting an anticancer immune response, whereas other DNA-damaging agents such as etoposide and mitomycin C do not induce immunogenic cell death. Here we show that anthracyclins induce the rapid, preapoptotic translocation of calreticulin (CRT) to the cell surface. Blockade or knockdown of CRT suppressed the phagocytosis of anthracyclin-treated tumor cells by dendritic cells and abolished their immunogenicity in mice. The anthracyclin-induced CRT translocation was mimicked by inhibition of the protein phosphatase 1/GADD34 complex. Administration of recombinant CRT or inhibitors of protein phosphatase 1/GADD34 restored the immunogenicity of cell death elicited by etoposide and mitomycin C, and enhanced their antitumor effects in vivo. These data identify CRT as a key feature determining anticancer immune responses and delineate a possible strategy for immunogenic chemotherapy.
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Affiliation(s)
- Michel Obeid
- INSERM U848, 39 Rue Camille-Desmoulins, F-94805 Villejuif, France
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89
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Segal BH, Wang XY, Dennis CG, Youn R, Repasky EA, Manjili MH, Subjeck JR. Heat shock proteins as vaccine adjuvants in infections and cancer. Drug Discov Today 2006; 11:534-40. [PMID: 16713905 DOI: 10.1016/j.drudis.2006.04.016] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2005] [Revised: 03/17/2006] [Accepted: 04/18/2006] [Indexed: 01/04/2023]
Abstract
In addition to maintaining cell homeostasis under physiological and stress conditions, some heat shock proteins (HSPs) are potent inducers of immunity and have been harnessed as vaccine adjuvants targeted to cancers and infections. HSPs are a group of ubiquitous intracellular molecules that function as molecular chaperones in numerous processes, such as protein folding and transport, and are induced under stress conditions, such as fever and radiation. Certain HSPs are potent inducers of innate and antigen-specific immunity. They activate dendritic cells partly through toll-like receptors, activate natural killer cells, increase presentation of antigens to effector cells and augment T-cell and humoral immune responses against their associated antigens. Their roles in priming multiple host defense pathways are being exploited in vaccine development for cancer and infectious diseases.
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Affiliation(s)
- Brahm H Segal
- Department of Medicine, Immunology, Cellular Stress Biology, and Urologic Oncology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA.
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90
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Watanabe K, Ohira H, Orikasa H, Saito K, Kanno K, Shioya Y, Obara K, Sato Y. Anti-calreticulin antibodies in patients with inflammatory bowel disease. Fukushima J Med Sci 2006; 52:1-11. [PMID: 16995349 DOI: 10.5387/fms.52.1] [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: 11/12/2022] Open
Abstract
PURPOSE Although the pathogenesis of inflammatory bowel disease (IBD) is unclear, autoimmune processes seem to play roles in IBD because several types of autoantibodies have been found in it. Calreticulin (CRT) is a soluble Ca2+ binding protein which is present in a wide variety of cells. CRT is localized mainly in the endoplasmic reticulum and is often a target for autoantibodies. The aim of this study was to evaluate the clinical significance of anti-CRT antibodies measured by enzyme-linked immunosorbent assay (ELISA) using the sera of patients with ulcerative colitis (UC) and Crohn's disease (CD). METHODS We measured the serum anti-CRT antibodies of 31 Japanese patients with UC and 24 with CD by ELISA. The controls were 105 subjects: 30 healthy persons, 44 patients with primary biliary cirrhosis (PBC), 21 with systemic lupus erythematosus (SLE) and 10 with acute colitis (AC). RESULTS The mean titer of anti-CRT antibodies was significantly higher in patients with UC than in healthy individuals (p <0.05). The prevalence of anti-CRT antibodies in these patients was significantly higher during the initial phase than during the passing phase (p <0.05). In patients with CD, the mean titer of anti-CRT antibodies was not significantly higher than in healthy individuals. The positivity for anti-CRT antibodies, however, was about 30% in those patients, which was as high as in patients with UC, SLE and PBC. In patients with AC, anti-CRT antibodies were all negative. CONCLUSIONS The positivity of anti-CRT antibodies may have a diagnostic value for IBD, especially in the initial phase of UC.
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Affiliation(s)
- Kenya Watanabe
- Department of Internal Medicine II, Fukushima Medical University School of Medicine, Japan
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91
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Hayashida Y, Urata Y, Muroi E, Kono T, Miyata Y, Nomata K, Kanetake H, Kondo T, Ihara Y. Calreticulin Represses E-cadherin Gene Expression in Madin-Darby Canine Kidney Cells via Slug. J Biol Chem 2006; 281:32469-84. [PMID: 16943193 DOI: 10.1074/jbc.m607240200] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Calreticulin (CRT) is a multifunctional Ca(2+)-binding molecular chaperone in the endoplasmic reticulum. In mammals, the expression level of CRT differs markedly in a variety of organs and tissues, suggesting that CRT plays a specific role in each cell type. In the present study, we focused on CRT functions in the kidney, where overall expression of CRT is quite low, and established CRT-overexpressing kidney epithelial cell-derived Madin-Darby canine kidney cells by gene transfection. We demonstrated that, in CRT-overexpressing cells, the morphology was apparently changed, and the original polarized epithelial cell phenotype was destroyed. Furthermore, CRT-overexpressing cells showed enhanced migration through Matrigel-coated Boyden chamber wells, compared with controls. E-cadherin expression was significantly suppressed at the protein and transcriptional levels in CRT-overexpressing cells compared with controls. On the other hand, the expression of mesenchymal protein markers, such as N-cadherin and fibronectin, was up-regulated. We also found that the expression of Slug, a repressor of the E-cadherin promoter, was up-regulated by overexpression of CRT through altered Ca(2+) homeostasis, and this led to enhanced binding of Slug to the E-box element in the E-cadherin promoter. Thus, we conclude that CRT regulates the epithelial-mesenchymal transition-like change of cellular phenotype by modulating the Slug/E-cadherin pathway through altered Ca(2+) homeostasis in cells, suggesting a novel function of CRT in cell-cell interaction of epithelial cells.
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Affiliation(s)
- Yasushi Hayashida
- Department of Biochemistry and Molecular Biology in Disease, Atomic Bomb Disease Institute, and Department of Urology, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
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92
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Abstract
Exosomes are small vesicles originating from late endosomes, 30–100 nm in diameter with typical cup-shape morphology. They are reported to bear high levels of a narrow spectrum of molecules involved in immune response and signal transduction. Apart from removing obsolete membrane proteins, some surprising biological functions of exosomes were unveiled recently and their applications in immunotherapy of tumors are currently intensively investigated. Dendritic cell- (DC) and tumor-derived exosomes have considerable anti-tumor effects in experimental studies and several clinical trials. Despite their potential applications in eliciting a “positive” immune response, exosomes might induce some “unwanted” immune responses, such as immune tolerance and immune evasion. Therefore further investigations about the physiological functions of exosomes and the optimal way of exosome application in tumor immunotherapy are necessary. This review presents recent developments in the field of exosome research and focuses on its applications to tumor immunotherapy.
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Affiliation(s)
- Xiao-Bo Li
- Institute of Environmental Medicine, Tongji Medical College, Huazhong University of Science and TechnologyWuhan, P.R. China
| | - Zhi-Ren Zhang
- Institute of Brain Research, University of TuebingenTuebingen, Germany
| | | | - Shun-Qing Xu
- Institute of Environmental Medicine, Tongji Medical College, Huazhong University of Science and TechnologyWuhan, P.R. China
- * Shun-Qing XU Institute of Environmental Medicine, Tongji Medical College, Huazhong University of Science and Technology, Road 13, Wuhan 430030, P. R. China. Tel.: 0086–27–83692721; E-mail:
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93
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Lund BT, Chakryan Y, Ashikian N, Mnatsakanyan L, Bevan CJ, Aguilera R, Gallaher T, Jakowec MW. Association of MBP peptides with Hsp70 in normal appearing human white matter. J Neurol Sci 2006; 249:122-34. [PMID: 16842822 DOI: 10.1016/j.jns.2006.05.066] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Revised: 05/04/2006] [Accepted: 05/26/2006] [Indexed: 10/24/2022]
Abstract
Multiple Sclerosis is an autoimmune disease directed against myelin proteins. The etiology of MS is poorly defined though, with no definitive causative agent yet identified. It has been hypothesized that MS may be a multifactorial disease resulting in the same end product: the destruction of myelin by the immune system. In this report we describe a potential role for heat shock proteins in the pathogenesis of MS. We isolated Hsp70 from the normal appearing white matter of both MS and normal human brain and found this was actively associated with, among other things, immunodominant MBP peptides. Hsp70-MBP peptide complexes prepared in vitro were shown to be highly immunogenic, with adjuvant-like effects stimulating MBP peptide-specific T cell lines to respond to normally sub-optimal concentrations of peptide. This demonstration of a specific interaction between Hsp70 and different MBP peptides, coupled with the adjuvanticity of this association is suggestive of a possible role for Hsp70 in the immunopathology associated with MS.
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Affiliation(s)
- Brett T Lund
- Department of Neurology, Keck School of Medicine, University of Southern California, McKibben Annex, Room 246, 1333 San Pablo Street, Los Angeles, California 90033, United States.
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94
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Torronteguy C, Frasson A, Zerwes F, Winnikov E, da Silva VD, Ménoret A, Bonorino C. Inducible heat shock protein 70 expression as a potential predictive marker of metastasis in breast tumors. Cell Stress Chaperones 2006; 11:34-43. [PMID: 16572727 PMCID: PMC1402360 DOI: 10.1379/csc-159r.1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Heat shock protein (Hsp)-peptide complexes purified from tumors can prime the immune system against tumor antigens, but how they contribute to the generation of immune responses against naturally occurring tumors is unknown. Murine tumors expressing high amounts of Hsp70 are preferentially rejected by the immune system, suggesting that low Hsp70 expression is advantageous for tumor growth in the host. To determine whether Hsp70 was differentially expressed in human tumors, inducible Hsp70 expression was quantitatively (by Western blot) and qualitatively (by immunohistology) analyzed in 53 biopsies of tumor and normal breast tissue. The mean expression of inducible Hsp70 was significantly higher in tumor compared with normal tissue (U = 899.0; P = 0.0033). However, a significant negative association of the amount of Hsp70 expressed by tumor tissue was found with metastasis (r = -0.309; P = 0.05). After 3 years, follow-up analysis determined that 7 of the 53 patients relapsed, and 5 died. Hsp70 expression in tumor (but not normal) cells was significantly lower in relapse patients and patients with metastatic disease than in patients with no relapse or metastasis. Together, these observations support the hypothesis that Hsp70 plays a role in tumor expansion in vivo, and tumors that downregulate it may be able to evade immunosurveillance and grow.
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Affiliation(s)
- Carolina Torronteguy
- Faculdade de Biociencias e, Instituto de Pesquisas Biomédicas, PUCRS, Avenida Ipiranga, 6690 2o andar, 90010, Porto Alegre, RS, Brazil
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95
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Fairburn B, Muthana M, Hopkinson K, Slack LK, Mirza S, Georgiou AS, Espigares E, Wong C, Pockley AG. Analysis of purified gp96 preparations from rat and mouse livers using 2-D gel electrophoresis and tandem mass spectrometry. Biochimie 2006; 88:1165-74. [PMID: 16690194 DOI: 10.1016/j.biochi.2006.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Accepted: 04/03/2006] [Indexed: 11/25/2022]
Abstract
The stress protein gp96 exhibits a number of immunological activities, the majority of studies into which have used gp96 purified from a variety of tissues. On the basis of 1-D gel electrophoresis, the purity of these preparations has been reported to range between 70% and 99%. This study analyzed gp96 preparations from rat and mouse livers using 2-D gel electrophoresis and liquid chromatography electrospray ionization tandem mass spectrometry (MS-MS). The procedure for purifying gp96 was reproducible, as similar protein profiles were observed in replicate gels of gp96 preparations. The purity of the preparations was typically around 70%, with minor co-purified proteins of varying molecular weights and mobilities being present. Dominant bands at 95-100 kDa in preparations from Wistar rats and C57BL/6 mice were identified as gp96 by ECL Western blotting. Multiple bands having similar, yet distinct molecular weights and differing pI mobility on ECL Western blots were confirmed as being gp96 in preparations from Wistar rats using MS-MS. The most striking feature of the 2-D gel analysis was the presence of additional dominant bands at 55 kDa in preparations from Wistar rats, and at 75-90 kDa in preparations from C57BL/6 mice. These were identified as gp96 by ECL Western blotting and, in the case of preparations from Wistar rats, by MS-MS. Although the lower molecular weight, gp96-related molecules might be partially degraded gp96, their reproducible presence, definition and characteristics suggest that they are alternative, species-specific isoforms of the molecule. A 55 kDa protein which exhibited a lower pI value than gp96 was present in all preparations and this was identified as calreticulin, another putative immunoregulatory molecule. This study confirms the reproducibility of the gp96 purification protocol and reveals the presence of multiple gp96 isoforms, some of which likely result from post-translational modifications such as differential glycosylation and phosphorylation.
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Affiliation(s)
- B Fairburn
- Immunobiology Research Unit, Clinical Sciences Centre, University of Sheffield, Northern General Hospital, Herries Road, Sheffield S5 7AU, UK
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96
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Cheng WF, Lee CN, Su YN, Chai CY, Chang MC, Polo JM, Hung CF, Wu TC, Hsieh CY, Chen CA. Sindbis virus replicon particles encoding calreticulin linked to a tumor antigen generate long-term tumor-specific immunity. Cancer Gene Ther 2006; 13:873-85. [PMID: 16645621 DOI: 10.1038/sj.cgt.7700956] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Alphavirus vectors have emerged as a promising strategy for the development of cancer vaccines and gene therapy applications. In this study, we used the replication-defective vaccine vector SIN replicon particles from a new packaging cell line (PCL) to develop SIN replicon particles encoding calreticulin (CRT) linked to a model tumor antigen, human papillomavirus type 16 (HPV16) E7 protein. The linkage of CRT to E7 in SIN replicon particles resulted in a significant increase in E7-specific CD8(+) T-cell precursors and a strong antitumor effect against E7-expressing tumors in vaccinated mice. SINrep5-CRT/E7 replicon particles enhanced presentation of E7 through the major histocompatibility complex (MHC) class I pathway by infecting dendritic cells (DCs) directly and pulsing DCs with lysates of cells infected by SINrep5-CRT/E7 replicons. Vaccination of immunocompromised (BALB/c nu/nu) mice with SINrep5-CRT/E7 replicon particles also generated significant reduction of lung tumor nodules, suggesting that antiangiogenesis may contribute to the antitumor effect of SINrep5-CRT/E7 replicon particles. Furthermore, SINrep5-CRT/E7 replicon particles generated long-term in vivo tumor protection effects and antigen-specific memory immunities. We concluded that the CRT strategy used in the context of SIN replicon particles facilitated the generation of a highly effective vaccine for cancer prophylaxis and immunotherapy.
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Affiliation(s)
- W-F Cheng
- Department of Obstetrics and Gynecology, National Taiwan University Hospital, Taipei
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97
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Zhao KJ, Cheng H, Zhu KJ, Xu Y, Chen ML, Zhang X, Song T, Ye J, Wang Q, Chen DF. Recombined DNA vaccines encoding calreticulin linked to HPV6bE7 enhance immune response and inhibit angiogenic activity in B16 melanoma mouse model expressing HPV 6bE7 antigen. Arch Dermatol Res 2006; 298:64-72. [PMID: 16710741 DOI: 10.1007/s00403-006-0659-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2005] [Revised: 01/28/2006] [Accepted: 03/08/2006] [Indexed: 11/30/2022]
Abstract
Calreticulin (CRT) has been reported to have an effect of upregulating MHC class I presentation as well as inhibiting angiogenesis in vitro and in vivo. Combination of dual mechanisms of enhanced immunogenicity of human papillomavirus (HPV) 6bE7 antigen and antiangiogenesis may be introduced in the strategy of vaccines against condyloma acuminatum (CA) resulting from HPV infection. Therefore, we constructed DNA vaccines by employing different lengths of CRT chimerically linked to a model antigen HPV6bE7 and investigated the immunological and antiangiogenic effects of these vaccines in a B16 melanoma model that express HPV6bE7 antigen. Our results showed that vaccination with CRT180/HPV6bE7 or CRT120/HPV6bE7 enhanced the presence of CD8(+) T cells and TCRgammadelta T cells in vivo, increased the specific lysis activity against E7-expressing cells and secretion levels of IL-2 and IFN-gamma by activating T cells in vitro significantly. Moreover, recombined CRT180 or CRT120 with HPV6bE7 vaccines could elicit a more efficient E7-specific immune response than HPV6bE7 alone. The similarity of immunological enhancement of CRT180/HPV6bE7 and CRT120/HPV6bE7 implies that the immunologically active region mainly exist in fragment 1-120 aa. Furthermore, CRT180/HPV6bE7 and CRT180 displayed remarkable superiority over CRT120/HPV6bE7 in vivo angiogenesis assay, suggesting that the antiangiogenic activity of CRT resides in a domain between aa 120 and 180. Vaccination with CRT180/HPV6bE7 generated the best protective effect of delaying tumor formation and reduction of tumor size in tumor growth inhibition experiment among all DNA constructs. Therefore, CRT180/HPV6bE7 vaccine may enhance the immunological response to HPV6bE7 and inhibit angiogenesis. This construct may be useful in preventing HPV-associated dermatosis and may be developed as a promising strategy to control CA.
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MESH Headings
- Animals
- Antigens, Viral/genetics
- Base Sequence
- Calbindin 2
- Cell Line, Tumor
- Condylomata Acuminata/immunology
- Condylomata Acuminata/pathology
- Condylomata Acuminata/therapy
- DNA Primers/genetics
- Female
- Human papillomavirus 6/genetics
- Human papillomavirus 6/immunology
- Human papillomavirus 6/pathogenicity
- Humans
- Interferon-gamma/biosynthesis
- Interleukin-2/biosynthesis
- Melanoma, Experimental/blood supply
- Melanoma, Experimental/immunology
- Melanoma, Experimental/pathology
- Melanoma, Experimental/therapy
- Mice
- Mice, Inbred C57BL
- Neovascularization, Pathologic/prevention & control
- Oncogene Proteins, Viral/genetics
- Oncogene Proteins, Viral/immunology
- Plasmids/genetics
- S100 Calcium Binding Protein G/genetics
- S100 Calcium Binding Protein G/immunology
- T-Lymphocytes, Cytotoxic/immunology
- Transfection
- Vaccines, DNA/genetics
- Vaccines, DNA/pharmacology
- Viral Vaccines/genetics
- Viral Vaccines/pharmacology
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Affiliation(s)
- Ke-Jia Zhao
- Department of Dermatology and Venereology, Sir Run Run Shaw Hospital, Zhejiang University Medical School, 3 East Qing Chun Road, Hangzhou, 310016, People's Republic of China
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98
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Galazka G, Stasiolek M, Walczak A, Jurewicz A, Zylicz A, Brosnan CF, Raine CS, Selmaj KW. Brain-derived heat shock protein 70-peptide complexes induce NK cell-dependent tolerance to experimental autoimmune encephalomyelitis. THE JOURNAL OF IMMUNOLOGY 2006; 176:1588-99. [PMID: 16424188 DOI: 10.4049/jimmunol.176.3.1588] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Heat shock proteins (Hsp) are markedly up-regulated at sites of inflammation during autoimmune diseases like experimental autoimmune encephalomyelitis (EAE). In this study, we show that Hsp70-peptide complexes (pc) isolated from brains of mice with EAE prevented the development of EAE clinically and pathologically when administered before proteolipid protein 139-151 (PLP139-151) immunization. In contrast, pure Hsp70 or Hsp70-pc derived from brains of healthy mice or other inflamed tissue did not modulate the expression of EAE. In animals in which EAE had been suppressed by Hsp70-pc, lymphocytes showed increased cell death in response to PLP139-151 that correlated with elevated IFN-gamma and NO production. Coculture of spleen cells from Hsp70-pc immunized mice with spleen cells from untreated EAE mice, in addition to depletion experiments, showed that NK cells reduced reactivity to PLP139-151. Transfer of NK cells from Hsp70-pc-immunized mice to recipients sensitized for EAE abolished disease development. Thus, we propose that Hsp70 demonstrate the ability to bind to peptides generated during brain inflammation and to induce a regulatory NK cell population that is capable of preventing subsequent autoimmunization for EAE.
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Affiliation(s)
- Grazyna Galazka
- Department of Neurology, Medical University of Lodz, Lodz, Poland
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99
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Zeng Y, Graner MW, Katsanis E. Chaperone-rich cell lysates, immune activation and tumor vaccination. Cancer Immunol Immunother 2006; 55:329-38. [PMID: 15887013 PMCID: PMC11030847 DOI: 10.1007/s00262-005-0694-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2004] [Accepted: 02/21/2005] [Indexed: 10/25/2022]
Abstract
We have utilized a free-solution-isoelectric focusing technique (FS-IEF) to obtain chaperone-rich cell lysates (CRCL) fractions from clarified tumor homogenates. The FS-IEF technique for enriching multiple chaperones from tumor lysate is relatively easy and rapid, yielding sufficient immunogenic material for clinical use. We have shown that tumor-derived CRCL carry antigenic peptides. Dendritic cells (DCs) uptake CRCL and cross-present the chaperoned peptides to T cells. Tumor-derived CRCL induce protective immune responses against a diverse range of murine tumor types in different genetic backgrounds. When compared to purified heat shock protein 70 (HSP70), single antigenic peptide or unfractionated lysate, CRCL have superior ability to activate/mature DCs and are able to induce potent, long lasting and tumor specific T-cell-mediated immunity. While CRCL vaccines were effective as stand-alone therapies, the enhanced immunogenicity arising from CRCL-pulsed DC as a vaccine indicates that CRCL could be the antigen source of choice for DC-based anti-cancer immunotherapies. The nature of CRCL's enhanced immunogenicity may lie in the broader antigenic peptide repertoire as well as the superior immune activation capacity of CRCL. Exongenous CRCL also supply danger signals in the context of apoptotic tumor cells and enhance the immunogenicity of apoptotic tumor cells, leading to tumor-specific T cell dependent long-term immunity. Moreover, CRCL based vaccines can be effectively combined with chemotherapy to treat cancer. Our findings indicate that CRCL have prominent adjuvant effects and are effective sources of tumor antigens for pulsing DCs. Tumor-derived CRCL are promising anti-cancer vaccines that warrant clinical research and development.
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Affiliation(s)
- Yi Zeng
- Department of Pediatrics, Steele Memorial Children’s Research Center, University of Arizona, 1501 N. Campbell Ave., PO Box 245073, Tucson, AZ 85724-5073 USA
| | - Michael W. Graner
- Department of Pediatrics, Steele Memorial Children’s Research Center, University of Arizona, 1501 N. Campbell Ave., PO Box 245073, Tucson, AZ 85724-5073 USA
- Present Address: Department of Pathology, Duke University, Durham, NC 27710 USA
| | - Emmanuel Katsanis
- Department of Pediatrics, Steele Memorial Children’s Research Center, University of Arizona, 1501 N. Campbell Ave., PO Box 245073, Tucson, AZ 85724-5073 USA
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100
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Facciponte JG, Wang XY, MacDonald IJ, Park JE, Arnouk H, Grimm MJ, Li Y, Kim H, Manjili MH, Easton DP, Subjeck JR. Heat shock proteins HSP70 and GP96: structural insights. Cancer Immunol Immunother 2006; 55:339-46. [PMID: 16032399 PMCID: PMC11031057 DOI: 10.1007/s00262-005-0020-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2005] [Accepted: 04/25/2005] [Indexed: 10/25/2022]
Abstract
Several heat shock proteins (HSPs) act as potent adjuvants for eliciting anti-tumor immunity. HSP-based tumor vaccine strategies have been highly successful in animal models and are undergoing testing in clinical trials. It is generally accepted that HSPs, functioning as chaperones for tumor antigens, elicit tumor-specific adaptive immune responses. HSPs also appear to induce innate immune responses in an antigen-independent fashion. Innate responses generated by HSPs may contribute to anti-tumor immunity. Immunologically active chaperones with anti-tumor activity are referred to as "immunochaperones". Here, we review the studies that address the role of structural domains or regions of the immunochaperones HSP70 and GP96 that may be involved in the induction of adaptive or innate immune responses.
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Affiliation(s)
- John G Facciponte
- Department of Immunology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA.
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