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Božić Nedeljković B, Ćilerdžić J, Zmijanjac D, Marković M, Džopalić T, Vasilijić S, Stajić M, Vučević D. Immunomodulatory effects of extract of Lingzhi or Reishi medicinal Mushroom Ganoderma lucidum (Agaricomycetes) basidiocarps cultivated on alternative substrate. Int J Med Mushrooms 2022; 24:45-59. [DOI: 10.1615/intjmedmushrooms.2022044452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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2
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Abstract
CpG Oligonucleotides (ODN) are immunomodulatory synthetic oligonucleotides specifically designed to stimulate Toll-like receptor 9. TLR9 is expressed on human plasmacytoid dendritic cells and B cells and triggers an innate immune response characterized by the production of Th1 and pro-inflammatory cytokines. This chapter reviews recent progress in understanding the mechanism of action of CpG ODN and provides an overview of human clinical trial results using CpG ODN to improve vaccines for the prevention/treatment of cancer, allergy, and infectious disease.
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Affiliation(s)
| | | | - Dennis M Klinman
- National Cancer Institute, NIH, Frederick, MD, USA.
- Leitman Klinman Consulting, Potomac, MD, USA.
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3
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Yang K, Liang Y, Sun Z, Liu L, Liao J, Xu H, Zhu M, Fu YX, Peng H. T cell-derived lymphotoxin limits Th1 response during HSV-1 infection. Sci Rep 2018; 8:17727. [PMID: 30531962 PMCID: PMC6286317 DOI: 10.1038/s41598-018-36012-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/30/2018] [Indexed: 11/09/2022] Open
Abstract
Though lymphotoxin (LT) is highly expressed by type I helper T (Th1) cells, its contribution to CD4+ T cell differentiation during infections and diseases remains a mystery. In HSV-1 infection, we observed that LTβR signaling is required to limit the Th1 response. Using bone marrow chimeric mice, mixed-T-cell chimeric mice, and LTβR in vivo blockades, we unexpectedly observed that LT, especially T cell-derived LT, played an indispensable role in limiting the Th1 response. The LTβR-Ig blockade promoted the Th1 response by increasing infiltration of monocytes and monocyte-derived DCs and up-regulating IL-12 secretion in the lymphoid environment. Our findings identified a novel role for T cell-derived LT in manipulating Th1 differentiation.
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Affiliation(s)
- Kaiting Yang
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yong Liang
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Zhichen Sun
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Longchao Liu
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Jing Liao
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Hairong Xu
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Mingzhao Zhu
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yang-Xin Fu
- Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.
| | - Hua Peng
- Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
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4
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Manrique SZ, Dominguez AL, Mirza N, Spencer CD, Bradley JM, Finke JH, Lee JJ, Pease LR, Gendler SJ, Cohen PA. Definitive activation of endogenous antitumor immunity by repetitive cycles of cyclophosphamide with interspersed Toll-like receptor agonists. Oncotarget 2018; 7:42919-42942. [PMID: 27341020 PMCID: PMC5189997 DOI: 10.18632/oncotarget.10190] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 04/29/2016] [Indexed: 01/04/2023] Open
Abstract
Many cancers both evoke and subvert endogenous anti-tumor immunity. However, immunosuppression can be therapeutically reversed in subsets of cancer patients by treatments such as checkpoint inhibitors or Toll-like receptor agonists (TLRa). Moreover, chemotherapy can leukodeplete immunosuppressive host elements, including myeloid-derived suppressor cells (MDSCs) and regulatory T-cells (Tregs). We hypothesized that chemotherapy-induced leukodepletion could be immunopotentiated by co-administering TLRa to emulate a life-threatening infection. Combining CpG (ODN 1826) or CpG+poly(I:C) with cyclophosphamide (CY) resulted in uniquely well-tolerated therapeutic synergy, permanently eradicating advanced mouse tumors including 4T1 (breast), Panc02 (pancreas) and CT26 (colorectal). Definitive treatment required endogenous CD8+ and CD4+ IFNγ-producing T-cells. Tumor-specific IFNγ-producing T-cells persisted during CY-induced leukopenia, whereas Tregs were progressively eliminated, especially intratumorally. Spleen-associated MDSCs were cyclically depleted by CY+TLRa treatment, with residual monocytic MDSCs requiring only continued exposure to CpG or CpG+IFNγ to effectively attack malignant cells while sparing non-transformed cells. Such tumor destruction occurred despite upregulated tumor expression of Programmed Death Ligand-1, but could be blocked by clodronate-loaded liposomes to deplete phagocytic cells or by nitric oxide synthase inhibitors. CY+TLRa also induced tumoricidal myeloid cells in naive mice, indicating that CY+TLRa's immunomodulatory impacts occurred in the complete absence of tumor-bearing, and that tumor-induced MDSCs were not an essential source of tumoricidal myeloid precursors. Repetitive CY+TLRa can therefore modulate endogenous immunity to eradicate advanced tumors without vaccinations or adoptive T-cell therapy. Human blood monocytes could be rendered similarly tumoricidal during in vitro activation with TLRa+IFNγ, underscoring the potential therapeutic relevance of these mouse tumor studies to cancer patients.
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Affiliation(s)
| | - Ana L Dominguez
- Department of Immunology, Mayo Clinic in Arizona, Scottsdale, AZ, USA
| | - Noweeda Mirza
- Department of Immunology, Mayo Clinic in Arizona, Scottsdale, AZ, USA
| | | | - Judy M Bradley
- Department of Immunology, Mayo Clinic in Arizona, Scottsdale, AZ, USA
| | - James H Finke
- Department of Immunology, Lerner Research Institute, Cleveland, OH, USA
| | - James J Lee
- Department of Biochemistry and Molecular Biology, Mayo Clinic in Arizona, Scottsdale, AZ, USA.,Division of Pulmonary Medicine, Mayo Clinic in Arizona, Scottsdale, AZ, USA
| | - Larry R Pease
- Department of Immunology, Mayo Clinic in Arizona, Scottsdale, AZ, USA
| | - Sandra J Gendler
- Department of Immunology, Mayo Clinic in Arizona, Scottsdale, AZ, USA.,Department of Biochemistry and Molecular Biology, Mayo Clinic in Arizona, Scottsdale, AZ, USA.,Division of Hematology/Oncology, Mayo Clinic in Arizona, Scottsdale, AZ, USA
| | - Peter A Cohen
- Department of Immunology, Mayo Clinic in Arizona, Scottsdale, AZ, USA.,Division of Hematology/Oncology, Mayo Clinic in Arizona, Scottsdale, AZ, USA
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5
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Yang C, Shi F, Li C, Wang Y, Wang L, Yang Z. Single Dose of Protein Vaccine with Peptide Nanofibers As Adjuvants Elicits Long-Lasting Antibody Titer. ACS Biomater Sci Eng 2017; 4:2000-2006. [DOI: 10.1021/acsbiomaterials.7b00488] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Chengbiao Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, P. R. China
- Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P. R. China
| | - Fang Shi
- Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P. R. China
| | - Can Li
- Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P. R. China
| | - Youzhi Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P. R. China
| | - Ling Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, P. R. China
| | - Zhimou Yang
- Key Laboratory of Bioactive Materials, Ministry of Education, and College of Life Sciences, Nankai University, and Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, P. R. China
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6
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Pathangey LB, McCurry DB, Gendler SJ, Dominguez AL, Gorman JE, Pathangey G, Mihalik LA, Dang Y, Disis ML, Cohen PA. Surrogate in vitro activation of innate immunity synergizes with interleukin-7 to unleash rapid antigen-driven outgrowth of CD4+ and CD8+ human peripheral blood T-cells naturally recognizing MUC1, HER2/neu and other tumor-associated antigens. Oncotarget 2017; 8:10785-10808. [PMID: 27974697 PMCID: PMC5355224 DOI: 10.18632/oncotarget.13911] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 11/23/2016] [Indexed: 01/21/2023] Open
Abstract
Effective adoptive immunotherapy has proved elusive for many types of human cancer, often due to difficulties achieving robust expansion of natural tumor-specific T-cells from peripheral blood. We hypothesized that antigen-driven T-cell expansion might best be triggered in vitro by acute activation of innate immunity to mimic a life-threatening infection. Unfractionated peripheral blood mononuclear cells (PBMC) were subjected to a two-step culture, first synchronizing their exposure to exogenous antigens with aggressive surrogate activation of innate immunity, followed by γ-chain cytokine-modulated T-cell hyperexpansion. Step 1 exposure to GM-CSF plus paired Toll-like receptor agonists (resiquimod and LPS), stimulated abundant IL-12 and IL-23 secretion, as well as upregulated co-stimulatory molecules and CD11c expression within the myeloid (CD33+) subpopulation. Added synthetic long peptides (>20aa) derived from widely expressed oncoproteins (MUC1, HER2/neu and CMVpp65), were reliably presented to CD4+ T-cells and cross-presented to CD8+ T-cells. Both presentation and cross-presentation demonstrated proteasomal and Sec61 dependence that could bypass the endoplasmic reticulum. Step 2 exposure to exogenous IL-7 or IL-7+IL-2 produced selective and sustained expansion of both CD4+ and CD8+ peptide-specific T-cells with a predominant interferon-γ-producing T1-type, as well as the antigen-specific ability to lyse tumor targets. Other γ-chain cytokines and/or combinations were initially proliferogenic, but followed by a contractile phase not observed with IL-7 or IL-7+IL-2. Regulatory T-cells were minimally propagated under these culture conditions. This mechanistically rational culture sequence, effective even for unvaccinated donors, enables rapid preparation of T-cells recognizing tumor-associated antigens expressed by the majority of human cancers, including pancreatic cancers, breast cancers and glioblastomas.
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Affiliation(s)
- Latha B Pathangey
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Dustin B McCurry
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Sandra J Gendler
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA.,Department of Immunology, Mayo Clinic, Scottsdale, AZ, USA.,Department of Hematology and Oncology, Mayo Clinic, Scottsdale, AZ, USA
| | - Ana L Dominguez
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Jessica E Gorman
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Girish Pathangey
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Scottsdale, AZ, USA
| | - Laurie A Mihalik
- Department of Hematology and Oncology, Mayo Clinic, Scottsdale, AZ, USA
| | - Yushe Dang
- Tumor Vaccine Group, Center for Translational Medicine in Women's Health, University of Washington, Seattle, WA, USA
| | - Mary L Disis
- Tumor Vaccine Group, Center for Translational Medicine in Women's Health, University of Washington, Seattle, WA, USA
| | - Peter A Cohen
- Department of Immunology, Mayo Clinic, Scottsdale, AZ, USA.,Department of Hematology and Oncology, Mayo Clinic, Scottsdale, AZ, USA
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7
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Kajihara M, Takakura K, Ohkusa T, Koido S. The impact of dendritic cell-tumor fusion cells on cancer vaccines - past progress and future strategies. Immunotherapy 2015; 7:1111-22. [PMID: 26507578 DOI: 10.2217/imt.15.73] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Dendritic cells (DCs) are potent antigen-presenting cells that can be used in cancer vaccines. Thus, various strategies have been developed to deliver tumor-associated antigens via DCs. One strategy includes administering DC-tumor fusion cells (DC-tumor FCs) to induce antitumor immune responses in cancer patients. However, clinical trials using this strategy have fallen short of expectations. Several factors might limit the efficacy of these anticancer vaccines. To induce efficient antitumor immune responses and enhance potential clinical benefits, DC-tumor FC-based cancer vaccines require manipulations that improve immunogenicity for both DCs and whole tumor cells. This review addresses recent progress in improving clinical outcomes using DC-tumor FC-based cancer vaccines.
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Affiliation(s)
- Mikio Kajihara
- Division of Gastroenterology & Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Kazuki Takakura
- Division of Gastroenterology & Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Toshifumi Ohkusa
- Division of Gastroenterology & Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Shigeo Koido
- Division of Gastroenterology & Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
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8
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Gene Expression Profile of Dendritic Cell-Tumor Cell Hybrids Determined by Microarrays and Its Implications for Cancer Immunotherapy. J Immunol Res 2015; 2015:789136. [PMID: 26605345 PMCID: PMC4641191 DOI: 10.1155/2015/789136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 10/08/2015] [Indexed: 12/24/2022] Open
Abstract
Background. Dendritic cell- (DC-) tumor fusion cells stimulate effective in vivo antitumor responses. However, therapeutic approaches are dependent upon the coadministration of exogenous 3rd signals. The purpose of this study was to determine the mechanisms for inadequate 3rd signaling by electrofused DC-tumor cell hybrids. Methods. Murine melanoma cells were fused with DCs derived from C57BL/6 mice. Quantitative real-time PCR (qPCR) was used to determine relative changes in Th (T helper) 1 and Th2 cytokine gene expression. In addition, changes in gene expression of fusion cells were determined by microarray. Last, cytokine secretion by fusion cells upon inhibition of signaling pathways was analyzed by ELISA. Results. qPCR analyses revealed that fusion cells exhibited a downregulation of Th1 associated cytokines IL-12 and IL-15 and an upregulation of the Th2 cytokine IL-4. Microarray studies further showed that the expression of chemokines, costimulatory molecules, and matrix-metalloproteinases was deregulated in fusion cells. Lastly, inhibitor studies demonstrate that inhibition of the PI3K/Akt/mTOR signaling pathway could restore the secretion of bioactive IL-12p70 by fusion cells. Conclusion. Our results suggest that combining fusion cell-based vaccination with administration of inhibitors of the PI3K/Akt/mTOR signaling pathway may enhance antitumor responses in patients.
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9
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Abstract
We have developed cell fusion vaccines generated with dendritic cells (DCs) and whole tumor cells to induce antigen-specific antitumor immunity. This approach allows DCs to be exposed to the entire repertoire of tumor-associated antigens (TAAs) originally expressed by the tumor cell, to process them endogenously, and to present antigenic epitopes thought the MHC class I and class II pathways to activate both CD8+ and CD4+ T cells, respectively. The therapeutic efficacy of DC/tumor fusion cell vaccines requires the improved immunogenicity of both cells. Here, we describe the strategy to generate DC/tumor fusion cells.
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Affiliation(s)
- Shigeo Koido
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba, 277-8564, Japan,
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10
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Ammi R, De Waele J, Willemen Y, Van Brussel I, Schrijvers DM, Lion E, Smits ELJ. Poly(I:C) as cancer vaccine adjuvant: knocking on the door of medical breakthroughs. Pharmacol Ther 2014; 146:120-31. [PMID: 25281915 DOI: 10.1016/j.pharmthera.2014.09.010] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Accepted: 09/22/2014] [Indexed: 01/03/2023]
Abstract
Although cancer vaccination has yielded promising results in patients, the objective response rates are low. The right choice of adjuvant might improve the efficacy. Here, we review the biological rationale, as well as the preclinical and clinical results of polyinosinic:polycytidylic acid and its derivative poly-ICLC as cancer vaccine adjuvants. These synthetic immunological danger signals enhanced vaccine-induced anti-tumor immune responses and contributed to tumor elimination in animal tumor models and patients. Supported by these results, poly-ICLC-containing cancer vaccines are currently extensively studied in the ongoing trials, making it highly plausible that poly-ICLC will be part of the future approved cancer immunotherapies.
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Affiliation(s)
- Rachid Ammi
- Laboratory of Physiopharmacology, University of Antwerp, B-2610 Antwerp, Belgium
| | - Jorrit De Waele
- Center for Oncological Research, University of Antwerp, B-2610 Antwerp, Belgium
| | - Yannick Willemen
- Tumor Immunology Group, Laboratory of Experimental Hematology, Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, B-2650 Edegem, Belgium
| | - Ilse Van Brussel
- Laboratory of Physiopharmacology, University of Antwerp, B-2610 Antwerp, Belgium
| | - Dorien M Schrijvers
- Laboratory of Physiopharmacology, University of Antwerp, B-2610 Antwerp, Belgium
| | - Eva Lion
- Tumor Immunology Group, Laboratory of Experimental Hematology, Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, B-2650 Edegem, Belgium; Center for Cell Therapy & Regenerative Medicine, Antwerp University Hospital, B-2650 Edegem, Belgium
| | - Evelien L J Smits
- Center for Oncological Research, University of Antwerp, B-2610 Antwerp, Belgium; Tumor Immunology Group, Laboratory of Experimental Hematology, Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, B-2650 Edegem, Belgium; Center for Cell Therapy & Regenerative Medicine, Antwerp University Hospital, B-2650 Edegem, Belgium.
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11
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Fu J, Malm IJ, Kadayakkara DK, Levitsky H, Pardoll D, Kim YJ. Preclinical evidence that PD1 blockade cooperates with cancer vaccine TEGVAX to elicit regression of established tumors. Cancer Res 2014; 74:4042-52. [PMID: 24812273 DOI: 10.1158/0008-5472.can-13-2685] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Biomarker studies have shown that expression of the T-cell coregulatory ligand PDL1 on tumor cells correlates with clinical responsiveness to the PD1 antibody nivolumab. Here, we report the findings of a preclinical cancer vaccine study demonstrating vaccine-dependent PDL1 upregulation in the tumor microenvironment. We formulated an IFNγ-inducing cancer vaccine called TEGVAX that combined GM-CSF and multiple Toll-like receptor agonists to increase the number of activated dendritic cells. Treatment of established tumors with TEGVAX retarded tumor growth in a manner associated with enhanced systemic antitumor immunity. Unexpectedly, TEGVAX also upregulated PDL1 expression in the tumor microenvironment, possibly explaining why tumors were not eliminated completely. In support of this likelihood, PDL1 upregulation in this setting relied upon IFNγ-expressing tumor-infiltrating CD4(+) and CD8(+) T cells and administration of a PD1-blocking antibody with TEGVAX elicited complete regression of established tumors. Taken together, our findings provide a mechanistic rationale to combine IFNγ-inducing cancer vaccines with immune checkpoint blockade.
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Affiliation(s)
- Juan Fu
- Department of Otolaryngology-Head and Neck Surgery
| | | | - Deepak K Kadayakkara
- Department of Oncology, and the Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Hy Levitsky
- Department of Oncology, and the Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Drew Pardoll
- Department of Oncology, and the Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Young J Kim
- Department of Otolaryngology-Head and Neck Surgery, Department of Oncology, and the Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
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12
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Pradhan P, Qin H, Leleux JA, Gwak D, Sakamaki I, Kwak LW, Roy K. The effect of combined IL10 siRNA and CpG ODN as pathogen-mimicking microparticles on Th1/Th2 cytokine balance in dendritic cells and protective immunity against B cell lymphoma. Biomaterials 2014; 35:5491-504. [PMID: 24720881 DOI: 10.1016/j.biomaterials.2014.03.039] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 03/17/2014] [Indexed: 02/01/2023]
Abstract
Success of an immunotherapy for cancer often depends on the critical balance of T helper 1 (Th1) and T helper 2 (Th2) responses driven by antigen presenting cells, specifically dendritic cells (DCs). Th1-driven cytotoxic T cell (CTL) responses are key to eliminating tumor cells. It is well established that CpG oligonucleotides (ODN), a widely studied Toll-like receptor 9 (TLR9) agonist, used to enhance Th1 response, also induces high levels of the anti-inflammatory, Th2-promoting cytokine IL10, which could dampen the resulting Th1 response. Biomaterials-based immunomodulatory strategies that can reduce IL10 production while maintaining IL12 levels during CpG delivery could further enhance the Th1/Th2 cytokine balance and improve anti-tumor immune response. Here we report that dual-delivery of IL10-silencing siRNA along with CpG ODN to the same DCs using pathogen-mimicking microparticles (PMPs), significantly enhances their Th1/Th2 cytokine ratio through concurrent inhibition of CpG-induced IL10 production. Co-delivery of poly(I:C), a TLR3 agonist had only minor effects on IL10 levels. Further, simultaneous immunotherapy with CpG ODN and IL10 siRNA enhanced immune protection of an idiotype DNA vaccine in a prophylactic murine model of B cell lymphoma whereas co-delivery of poly(I:C) and CpG did not enhance protection. These results suggest that PMPs can be used to precisely modulate TLR ligand-mediated immune-stimulation in DCs, through co-delivery of cytokine-silencing siRNAs and thereby boost antitumor immunity.
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Affiliation(s)
- Pallab Pradhan
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Hong Qin
- Department of Lymphoma and Myeloma, The Center for Cancer Immunology Research, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Jardin A Leleux
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Dongho Gwak
- Department of Lymphoma and Myeloma, The Center for Cancer Immunology Research, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Ippei Sakamaki
- Department of Lymphoma and Myeloma, The Center for Cancer Immunology Research, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Larry W Kwak
- Department of Lymphoma and Myeloma, The Center for Cancer Immunology Research, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Krishnendu Roy
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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13
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Shirota H, Klinman DM. Recent progress concerning CpG DNA and its use as a vaccine adjuvant. Expert Rev Vaccines 2013; 13:299-312. [PMID: 24308579 DOI: 10.1586/14760584.2014.863715] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
CpG Oligonucleotides (ODN) are immunomodulatory synthetic oligonucleotides designed to specifically agonize Toll-like receptor 9. Here, we review recent progress in understanding the mechanism of action of CpG ODN and provide an overview of human clinical trial results using CpG ODN to improve the vaccines for cancer, allergy and infectious disease.
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14
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Eigenbrod T, Dalpke AH. TLR7 inhibition: A novel strategy for pancreatic cancer treatment? JAKSTAT 2013; 2:e23011. [PMID: 24058792 PMCID: PMC3670268 DOI: 10.4161/jkst.23011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 11/23/2012] [Accepted: 11/27/2012] [Indexed: 02/07/2023] Open
Abstract
Pancreatic ductal adenocarcinoma is associated with a poor prognosis: For local disease, the 5-y survival rate is approximately 20% and median survival in locally advanced disease is only about 10 mo. Carcinogenesis is associated with chronic inflammation showing that innate immunity can be a double-edged sword. Here, we discuss recent findings of Ochi et al. in The Journal of Clinical Investigation who described a novel role for TLR7 in the development and progression of pancreatic cancer through interference with cell cycle regulation and by activation of multiple cell signaling pathways. Of note, inhibition of TLR7 signaling in a mouse p48Cre;KrasG12D pancreatic cancer model protected against tumor progression thus paving the road for TLR-blocking strategies to combat tumors.
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Affiliation(s)
- Tatjana Eigenbrod
- Department of Infectious Diseases; Medical Microbiology and Hygiene; University Heidelberg; Heidelberg, Germany
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15
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Koido S, Homma S, Okamoto M, Namiki Y, Takakura K, Uchiyama K, Kajihara M, Arihiro S, Imazu H, Arakawa H, Kan S, Komita H, Kamata Y, Ito M, Ohkusa T, Gong J, Tajiri H. Strategies to improve the immunogenicity of anticancer vaccines based on dendritic cell/malignant cell fusions. Oncoimmunology 2013; 2:e25994. [PMID: 24228229 PMCID: PMC3820816 DOI: 10.4161/onci.25994] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Accepted: 07/31/2013] [Indexed: 02/06/2023] Open
Abstract
The rationale for fusing dendritic cells (DCs) with whole tumor cells to generate anticancer vaccines resides in the fact that the former operate as potent antigen-presenting cells, whereas the latter express a constellation of tumor-associated antigens (TAAs). Although the administration of DC/malignant cell fusions to cancer patients is safe and this immunotherapeutic intervention triggers efficient tumor-specific T-cell responses in vitro, a limited number of objective clinical responses to DC/cancer cell fusions has been reported thus far. This review discusses novel approaches to improve the immunogenicity of DC/malignant cell fusions as anticancer vaccines.
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Affiliation(s)
- Shigeo Koido
- Division of Gastroenterology and Hepatology; Department of Internal Medicine; The Jikei University School of Medicine; Tokyo, Japan ; Institute of Clinical Medicine and Research; The Jikei University School of Medicine; Tokyo, Japan ; Department of Oncology; Institute of DNA Medicine; The Jikei University School of Medicine; Tokyo, Japan
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Tan C, Dannull J, Nair SK, Ding E, Tyler DS, Pruitt SK, Lee WT. Local secretion of IL-12 augments the therapeutic impact of dendritic cell-tumor cell fusion vaccination. J Surg Res 2013; 185:904-11. [PMID: 23891424 DOI: 10.1016/j.jss.2013.06.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 06/14/2013] [Accepted: 06/20/2013] [Indexed: 12/23/2022]
Abstract
BACKGROUND The development of dendritic cell (DC)-tumor fusion vaccines is a promising approach in cancer immunotherapy. Using fusion vaccines allows a broad spectrum of known and unidentified tumor-associated antigens to be presented in the context of MHC class I and class II molecules, with potent co-stimulation provided by the DCs. Although DC-tumor fusion cells are immunogenic, murine studies have shown that effective immunotherapy requires a third signal, which can be provided by exogenous interleukin 12 (IL-12). Unfortunately, systemic administration of IL-12 induces severe toxicity in cancer patients, potentially precluding clinical use of this cytokine to augment fusion vaccine efficacy. To overcome this limitation, we developed a novel approach in which DC-tumor fusion cells locally secrete IL-12, then evaluated the effectiveness of this approach in a murine B16 melanoma model. MATERIALS AND METHODS Tumor cells were stably transduced to secrete murine IL-12p70. These tumor cells were then electrofused to DC to form DC-tumor heterokaryons. These cells were used to treat established B16 pulmonary metastases. Enumeration of these metastases was performed and compared between experimental groups using Wilcoxon rank sum test. Interferon γ enzyme-linked immunosorbent spot assay was performed on splenocytes from treated mice. RESULTS We show that vaccination with DCs fused to syngeneic melanoma cells that stably express murine IL-12p70 significantly reduces counts of established lung metastases in treated animals when compared with DC-tumor alone (P = 0.029). Interferon γ enzyme-linked immunosorbent spot assays suggest that this antitumor response is mediated by CD4(+) T cells, in the absence of a tumor-specific CD8(+) T cell response, and that the concomitant induction of antitumor CD4(+) and CD8(+) T cell responses required exogenous IL-12. CONCLUSIONS This study is, to the best of our knowledge, the first report that investigates the impact of local secretion of IL-12 on antitumor immunity induced by a DC-tumor fusion cell vaccine in a melanoma model and may aid the rational design of future clinical trials.
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Affiliation(s)
- Chunrui Tan
- Division of Otolaryngology, Duke University Medical Center, Durham, North Carolina
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17
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Tan C, Reddy V, Dannull J, Ding E, Nair SK, Tyler DS, Pruitt SK, Lee WT. Impact of anti-CD25 monoclonal antibody on dendritic cell-tumor fusion vaccine efficacy in a murine melanoma model. J Transl Med 2013; 11:148. [PMID: 23768240 PMCID: PMC3691646 DOI: 10.1186/1479-5876-11-148] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 06/04/2013] [Indexed: 12/12/2022] Open
Abstract
Background A promising cancer vaccine involves the fusion of tumor cells with dendritic cells (DCs). As such, a broad spectrum of both known and unidentified tumor antigens is presented to the immune system in the context of the potent immunostimulatory capacity of DCs. Murine studies have demonstrated the efficacy of fusion immunotherapy. However the clinical impact of DC/tumor fusion vaccines has been limited, suggesting that the immunosuppresive milieu found in patients with malignancies may blunt the efficacy of cancer vaccination. Thus, novel strategies to enhance fusion vaccine efficacy are needed. Regulatory T cells (Tregs) are known to suppress anti-tumor immunity, and depletion or functional inactivation of these cells improves immunotherapy in both animal models and clinical trials. In this study, we sought to investigate whether functional inactivation of CD4+CD25+FoxP3+ Treg with anti-CD25 monoclonal antibody (mAb) PC61 prior to DC/tumor vaccination would significantly improve immunotherapy in the murine B16 melanoma model. Methods Treg blockade was achieved with systemic PC61 administration. This blockage was done in conjunction with DC/tumor fusion vaccine administration to treat established melanoma pulmonary metastases. Enumeration of these metastases was performed and compared between experimental groups using Wilcoxon Rank Sum Test. IFN-gamma ELISPOT assay was performed on splenocytes from treated mice. Results We demonstrate that treatment of mice with established disease using mAb PC61 and DC/tumor fusion significantly reduced counts of pulmonary metastases compared to treatment with PC61 alone (p=0.002) or treatment with control antibody plus fusion vaccine (p=0.0397). Furthermore, IFN-gamma ELISPOT analyses reveal that the increase in cancer immunity was mediated by anti-tumor specific CD4+ T-helper cells, without concomitant induction of CD8+ cytotoxic T cells. Lastly, our data provide proof of principle that combination treatment with mAb PC61 and systemic IL-12 can lower the dose of IL-12 necessary to obtain maximal therapeutic efficacy. Conclusions To our knowledge, this is the first report investigating the effects of anti-CD25 mAb administration on DC/tumor-fusion vaccine efficacy in a murine melanoma model, and our results may aide the design of future clinical trials with enhanced therapeutic impact.
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Affiliation(s)
- Chunrui Tan
- Division of Otolaryngology, Duke University Medical Center, Durham, NC, USA
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Koido S, Homma S, Okamoto M, Namiki Y, Takakura K, Takahara A, Odahara S, Tsukinaga S, Yukawa T, Mitobe J, Matsudaira H, Nagatsuma K, Kajihara M, Uchiyama K, Arihiro S, Imazu H, Arakawa H, Kan S, Hayashi K, Komita H, Kamata Y, Ito M, Hara E, Ohkusa T, Gong J, Tajiri H. Augmentation of antitumor immunity by fusions of ethanol-treated tumor cells and dendritic cells stimulated via dual TLRs through TGF-β1 blockade and IL-12p70 production. PLoS One 2013; 8:e63498. [PMID: 23717436 PMCID: PMC3663747 DOI: 10.1371/journal.pone.0063498] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 04/02/2013] [Indexed: 12/13/2022] Open
Abstract
The therapeutic efficacy of fusion cell (FC)-based cancer vaccine generated with whole tumor cells and dendritic cells (DCs) requires the improved immunogenicity of both cells. Treatment of whole tumor cells with ethanol resulted in blockade of immune-suppressive soluble factors such as transforming growth factor (TGF)-β1, vascular endothelial growth factor, and IL-10 without decreased expression of major histocompatibility complex (MHC) class I and the MUC1 tumor-associated antigen. Moreover, the ethanol-treated tumor cells expressed “eat-me” signals such as calreticulin (CRT) on the cell surface and released immunostimulatory factors such as heat shock protein (HSP)90α and high-mobility group box 1 (HMGB1). A dual stimulation of protein-bound polysaccharides isolated from Coriolus versicolor (TLR2 agonist) and penicillin-inactivated Streptococcus pyogenes (TLR4 agonist) led human monocyte-derived DCs to produce HSP90α and multiple cytokines such as IL-12p70 and IL-10. Interestingly, incorporating ethanol-treated tumor cells and TLRs-stimulated DCs during the fusion process promoted fusion efficiency and up-regulated MHC class II molecules on a per fusion basis. Moreover, fusions of ethanol-treated tumor cells and dual TLRs-stimulated DCs (E-tumor/FCs) inhibited the production of multiple immune-suppressive soluble factors including TGF-β1 and up-regulated the production of IL-12p70 and HSP90α. Most importantly, E-tumor/FCs activated T cells capable of producing high levels of IFN-γ, resulting in augmented MUC1-specific CTL induction. Collectively, our results illustrate the synergy between ethanol-treated whole tumor cells and dual TLRs-stimulated DCs in inducing augmented CTL responses in vitro by FC preparations. The alternative system is simple and may provide a platform for adoptive immunotherapy.
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Affiliation(s)
- Shigeo Koido
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan.
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19
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Koido S, Homma S, Okamoto M, Namiki Y, Takakura K, Takahara A, Odahara S, Tsukinaga S, Yukawa T, Mitobe J, Matsudaira H, Nagatsuma K, Uchiyama K, Kajihara M, Arihiro S, Imazu H, Arakawa H, Kan S, Komita H, Ito M, Ohkusa T, Gong J, Tajiri H. Combined TLR2/4-activated dendritic/tumor cell fusions induce augmented cytotoxic T lymphocytes. PLoS One 2013; 8:e59280. [PMID: 23555011 PMCID: PMC3598755 DOI: 10.1371/journal.pone.0059280] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 02/13/2013] [Indexed: 12/01/2022] Open
Abstract
Induction of antitumor immunity by dendritic cell (DC)-tumor fusion cells (DC/tumor) can be modulated by their activation status. In this study, to address optimal status of DC/tumor to induce efficient antigen-specific cytotoxic T lymphocytes (CTLs), we have created various types of DC/tumor: 1) un-activated DC/tumor; 2) penicillin-killed Streptococcus pyogenes (OK-432; TLR4 agonist)-activated DC/tumor; 3) protein-bound polysaccharides isolated from Coriolus versicolor (PSK; TLR2 agonist)-activated DC/tumor; and 4) Combined OK-432- and PSK-activated DC/tumor. Moreover, we assessed the effects of TGF-β1 derived from DC/tumor on the induction of MUC1-specific CTLs. Combined TLR2- and TLR4-activated DC/tumor overcame immune-suppressive effect of TGF-β1 in comparison to those single activated or un-activated DC/tumor as demonstrated by: 1) up-regulation of MHC class II and CD86 expression on DC/tumor; 2) increased fusion efficiency; 3) increased production of fusions derived IL-12p70; 4) activation of CD4+ and CD8+ T cells that produce high levels of IFN-γ; 5) augmented induction of CTL activity specific for MUC1; and 6) superior efficacy in inhibiting CD4+CD25+Foxp3+ T cell generation. However, DC/tumor-derived TGF-β1 reduced the efficacy of DC/tumor vaccine in vitro. Incorporating combined TLRs-activation and TGF-β1-blockade of DC/tumor may enhance the effectiveness of DC/tumor-based cancer vaccines and have the potential applicability to the field of adoptive immunotherapy.
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Affiliation(s)
- Shigeo Koido
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan.
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Younesi V, Shirazi FG, Memarian A, Amanzadeh A, Jeddi-Tehrani M, Shokri F. Assessment of the effect of TLR7/8, TLR9 agonists and CD40 ligand on the transformation efficiency of Epstein-Barr virus in human B lymphocytes by limiting dilution assay. Cytotechnology 2013; 66:95-105. [PMID: 23404520 DOI: 10.1007/s10616-013-9542-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Accepted: 01/27/2013] [Indexed: 12/28/2022] Open
Abstract
Infection of human B cells with Epstein-Barr virus (EBV) induces polyclonal activation in almost all infected cells, but a small proportion of infected cells are transformed to immortalized lymphoblastoid cell lines. Since B cells are activated also by CD40 ligand (CD40L) and Toll-like receptor (TLR) agonists via a similar signaling pathway, it is likely that costimulation through these molecules could result in synergistic enhancement of the transformation efficiency of EBV. In this study, the stimulatory effect of TLR7/8 (R848), TLR9 (CpG) agonists and/or CD40L on transformation efficiency of EBV in normal human B cells was assessed using the limiting dilution assay. Costimulation of peripheral blood mononuclear cells (PBMCs) with CpG and R848, but not CD40L, increased significantly the frequency of EBV transformed B cells (p < 0.001). Neither synergistic nor additive effects were observed between TLR agonists and CD40L and also TLR7/8 and TLR9 agonists. Costimulation with R848, CpG and CD40L enhanced the proliferative response of B cells infected with EBV. This effect was more evident when enriched B cells were employed, compared to PBMCs. The promoting effect of TLR agonists stimulation, implies that EBV may take advantage of the genes induced by the TLR stimulation pathway for viral latency and oncogenesis.
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Affiliation(s)
- Vahid Younesi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, 14155, Tehran, Iran
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21
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Therapeutic applications of nucleic acids and their analogues in Toll-like receptor signaling. Molecules 2012; 17:13503-29. [PMID: 23151919 PMCID: PMC6269001 DOI: 10.3390/molecules171113503] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 11/07/2012] [Accepted: 11/09/2012] [Indexed: 02/07/2023] Open
Abstract
Toll-like receptors (TLRs) belong to a family of innate immune receptors that detect and clear invading microbial pathogens. Specifically intracellular TLRs such as TLR3, TLR7, TLR8 and TLR9 recognize nucleic acids such as double-stranded RNA, single-stranded RNA and CpG DNA respectively derived from microbial components. Upon infection, nucleic acid sensing TLRs signal within endosomal compartment triggering the induction of essential proinflammatory cytokines and type I interferons to initiate innate immune responses thereby leading to a critical role in the development of adaptive immune responses. Thus, stimulation of TLRs by nucleic acids is a promising area of research for the development of novel therapeutic strategies against pathogenic infection, allergies, malignant neoplasms and autoimmunity. This review summarizes the therapeutic applications of nucleic acids or nucleic acid analogues through the modulation of TLR signaling pathways.
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22
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Muccioli M, Sprague L, Nandigam H, Pate M, Benencia F. Toll-like receptors as novel therapeutic targets for ovarian cancer. ISRN ONCOLOGY 2012; 2012:642141. [PMID: 22530148 PMCID: PMC3317035 DOI: 10.5402/2012/642141] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 11/10/2011] [Indexed: 02/02/2023]
Abstract
Ovarian cancer (OC) is an aggressive disease that affects approximately 1 in 70 women and has a poor prognosis (<50%, 5-year survival rate), in part because it is often diagnosed at a late stage. There are three main types of OC: neoplasms of surface epithelial, germ cell, or stromal origin, with surface epithelial tumors comprising about 80% of all OCs. In addition to improving diagnostics, it is necessary to develop more effective treatments for epithelial-origin OC. Here, we describe the paradoxical roles of toll-like receptor (TLR) signaling in the progression of cancer and discuss how its modulation may result in decreased tumor growth and metastasis via the attenuation of proangiogenic cytokines and potentiation of proapoptotic factors. In particular, it has been found that TLR activity can behave like a “double-edged sword”, as its signaling pathways have been implicated as having both tumor-suppressive and tumor-promoting effects. With particular emphasis on OC, we discuss the need to consider the signaling details of TLRs and associated proteins in the multiple cell types present in the tumor milieu to achieve safe and effective design of TLR-based cancer therapies.
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Affiliation(s)
- Maria Muccioli
- Molecular and Cell Biology Program, Ohio University, Athens, OH, USA
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23
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Li Y, Wang LX, Pang P, Cui Z, Aung S, Haley D, Fox BA, Urba WJ, Hu HM. Tumor-derived autophagosome vaccine: mechanism of cross-presentation and therapeutic efficacy. Clin Cancer Res 2011; 17:7047-57. [PMID: 22068657 DOI: 10.1158/1078-0432.ccr-11-0951] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE We previously reported that autophagy in tumor cells plays a critical role in cross-presentation of tumor antigens and that autophagosomes are efficient antigen carriers for cross-priming of tumor-reactive CD8(+) T cells. Here, we sought to characterize further the autophagosome-enriched vaccine named DRibble (DRiPs-containing blebs), which is derived from tumor cells after inhibition of protein degradation, and to provide insights into the mechanisms responsible for their efficacy as a novel cancer immunotherapy. EXPERIMENTAL DESIGN DRibbles were characterized by Western blot and light or transmission electron microscopy. The efficiency of cross-presentation mediated by DRibbles was first compared with that of whole-tumor cells and pure proteins. The mechanisms of antigen cross-presentation by DRibbles were analyzed, and the antitumor efficacy of the DRibble vaccine was tested in 3LL Lewis lung tumors and B16F10 melanoma. RESULTS The DRibbles sequester both long-lived and short-lived proteins, including defective ribosomal products (DRiP), and damage-associated molecular pattern molecules exemplified by HSP90, HSP94, calreticulin, and HMGB1. DRibbles express ligands for CLEC9A, a newly described C-type lectin receptor expressed by a subset of conventional and plasmacytoid dendritic cells (DC), and cross-presentation was partially CLEC9A dependent. Furthermore, this autophagy-assisted antigen cross-presentation pathway involved both caveolae- and clathrin-mediated endocytosis and endoplasmic reticulum-associated degradation machinery. It depends on proteasome and TAP1, but not lysosome functions of antigen-presenting cells. Importantly, DCs loaded with autophagosome-enriched DRibbles can eradicate 3LL Lewis lung tumors and significantly delay the growth of B16F10 melanoma. CONCLUSIONS These data documented the unique characteristics and potent antitumor efficacy of the autophagosome-based DRibble vaccine. The efficacy of DRibble cancer vaccine will be further tested in clinical trials.
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Affiliation(s)
- Yuhuan Li
- Laboratory of Cancer Immunobiology, Robert W. Franz Cancer Research Center, Earle A. Chiles Research Institute, Providence Portland Medical Center, Portland, Oregon 97213, USA
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24
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Immunostimulatory CpG-DNA and PSA-peptide vaccination elicits profound cytotoxic T cell responses. Urol Oncol 2011; 31:1395-401. [PMID: 21982682 DOI: 10.1016/j.urolonc.2011.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 09/02/2011] [Accepted: 09/06/2011] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Novel strategies for the treatment of advanced prostate cancer (CaP), including immunotherapy or gene therapy, are currently under evaluation with Sipuleucel-T as first FDA-approved immunotherapeutic. Here, we examine cytosine-phosphorothioate-guanine (CpG)-DNA oligonucleotides (ODN) to boost cytokine responses and costimulatory molecule expression on murine bone marrow-derived dendritic cells (mBMDC). Furthermore, we evaluate the potency of a PSA-peptide based vaccine in combination with CpG-DNA to elicit specific cytotoxic T cell (CTL) responses. MATERIALS AND METHODS mBMDC were stimulated with CpG-DNA (1668: 5'-TCCATGACGTTCCTGATGCT-3') or non-stimulatory control-ODN (1720: 5'-TCCATGAGCTTCCTGATGCT-3'). Subsequently, expression of the costimulatory molecules CD40 and CD86 and induction of proinflammatory cytokines (interleukin (IL)-6 and IL-12) were analyzed. For induction of PSA-peptide specific CTL, female C57BL/6 mice were immunized with PSA-peptide 65-73 (HCIRNKSVI) alone or in combination with 1668 or 1720-ODN. In vivo cytotoxicity assay determined PSA-peptide specific cytotoxicity 1 week after vaccination. RESULTS Treatment of mBMDC with stimulatory CpG-DNA ODN resulted in pronounced up-regulation of costimulatory molecule expression on mBMDC in a dose-dependent manner. CpG-ODN significantly increased production of IL-6 and IL-12 in mBMDC (P < 0.001). Induction of PSA-peptide specific CTL responses in mice immunized with PSA-peptide and CpG-DNA were significantly greater than those of PSA-peptide and control-ODN immunized mice or PSA-peptide only vaccination. CONCLUSIONS CpG-DNA acts as potent adjuvant for vaccination therapies and elicits profound PSA-peptide specific CTL responses in combination with an immunodominant PSA-peptide. CpG-ODN mediated immunotherapy represents a potentially inexpensive, safe, easy-to-produce, and easy-to-handle treatment alternative. Therefore, further evaluation of CpG-DNA in immunization therapies against CaP is warranted.
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Immunologic monitoring of cellular responses by dendritic/tumor cell fusion vaccines. J Biomed Biotechnol 2011; 2011:910836. [PMID: 21541197 PMCID: PMC3085507 DOI: 10.1155/2011/910836] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 11/11/2010] [Accepted: 02/27/2011] [Indexed: 12/22/2022] Open
Abstract
Although dendritic cell (DC)- based cancer vaccines induce effective antitumor activities in murine models, only limited therapeutic results have been obtained in clinical trials. As cancer vaccines induce antitumor activities by eliciting or modifying immune responses in patients with cancer, the Response Evaluation Criteria in Solid Tumors (RECIST) and WHO criteria, designed to detect early effects of cytotoxic chemotherapy in solid tumors, may not provide a complete assessment of cancer vaccines. The problem may, in part, be resolved by carrying out immunologic cellular monitoring, which is one prerequisite for rational development of cancer vaccines. In this review, we will discuss immunologic monitoring of cellular responses for the evaluation of cancer vaccines including fusions of DC and whole tumor cell.
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Basith S, Manavalan B, Lee G, Kim SG, Choi S. Toll-like receptor modulators: a patent review (2006-2010). Expert Opin Ther Pat 2011; 21:927-44. [PMID: 21406035 DOI: 10.1517/13543776.2011.569494] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
INTRODUCTION The immune response is mediated via two parallel immune components, innate and adaptive, whose effector functions are highly integrated and coordinated for the protection of the human body against invading pathogens and transformed cells. The discovery of pathogen recognition receptors (PRRs), most notably toll-like receptors (TLRs), in innate immunity has evoked increased interest in the therapeutic handling of the innate immune system. TLRs are germ line-encoded receptors that play a potent role in the recognition of a diverse variety of ligands ranging from hydrophilic nucleic acids to lipopolysaccharide (LPS) or peptidoglycan (PGN) structures in pathogens. AREAS COVERED This review discusses recent updates (2006-2010) in completed, ongoing and planned clinical trials of TLR immunomodulator-based therapies for the treatment of infectious diseases, inflammatory disorders and cancer. EXPERT OPINION Since the discovery of human TLRs, modulating immune responses using TLR agonists or antagonists for therapeutic purposes has provoked intense activity in the pharmaceutical industry. The ability of TLRs to initiate and propagate inflammation makes them attractive therapeutic targets. We are now at the stage of evaluating such molecules in human diseases. Additionally, there is also extensive literature available on TLRs in diseased states. These data provide a basis for the identification of novel immunomodulators (agonists and antagonists) for the therapeutic targeting of TLRs.
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Affiliation(s)
- Shaherin Basith
- Ajou University, Department of Molecular Science and Technology, Suwon 443 749, Korea
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Lin Y, Zhang L, Cai AX, Lee M, Zhang W, Neuberg D, Canning CM, Soiffer RJ, Alyea EP, Ritz J, Hacohen N, Means TK, Wu CJ. Effective posttransplant antitumor immunity is associated with TLR-stimulating nucleic acid-immunoglobulin complexes in humans. J Clin Invest 2011; 121:1574-84. [PMID: 21403403 DOI: 10.1172/jci44581] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 01/19/2011] [Indexed: 12/27/2022] Open
Abstract
Donor lymphocyte infusion (DLI), whereby donor mononuclear cells are infused into patients, is one of the few effective immunotherapeutic strategies that generate long-lasting tumor remissions. We previously demonstrated that chronic myelogenous leukemia (CML) patients treated with DLI develop high-titer plasma antibodies specific for CML-associated antigens, the majority of which have been reported to bind nucleic acids These observations led us to predict that circulating antibody-antigen complexes in DLI-responsive patients carry nucleic acids that can engage innate immune sensors. Consistent with this, we report here that post-DLI plasma from 5 CML patients that responded to DLI treatment induced massive upregulation of MIP-1α, IP-10, and IFN-α in normal blood mononuclear cells. Importantly, this was not observed with plasma obtained before DLI and from DLI nonresponders and imatinib-treated patients. This endogenous immunostimulatory activity required nucleic acid and protein for its adjuvant effect and activated antigen-presenting cells through the RNA and DNA sensors TLR8 and TLR9. Presence of the immunoglobulin Fc receptor CD32 enhanced cellular responses, suggesting that immunoglobulins associate with this activity. Finally, a TLR-induced expression signature was detectable in post-DLI but not pre-DLI blood, consistent with an active circulating TLR8/9-stimulating factor. We have therefore demonstrated that effective tumor immunity correlates with the presence of endogenous nucleic acid-immunoglobulin complexes in patient plasma, thus providing a putative mechanism for the induction of potent antigen-specific immunity against malignant cells.
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Affiliation(s)
- Yun Lin
- Cancer Vaccine Center, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA
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Koido S, Hara E, Homma S, Ohkusa T, Gong J, Tajiri H. Cancer immunotherapy by fusions of dendritic cells and tumor cells. Immunotherapy 2011; 1:49-62. [PMID: 20635973 DOI: 10.2217/1750743x.1.1.49] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dendritic cells (DCs) are potent professional antigen-presenting cells and play a critical role in the induction of primary immune responses. DC-based vaccination represents a potentially powerful strategy for cancer immunotherapy. Thus, the use of cancer vaccines to eliminate residual tumor cells is a promising area of investigation. The immunotherapy of tumor antigen-loaded DCs has now been demonstrated in cancer patients and some clinical responses without any significant toxicity. Fusions of DCs and tumor cells represent an alternative but promising approach to overcome the inability of tumor antigens to induce a sustainable T-cell response. This review deals with recent progress in the immunotherapy of cancer with fusions of DCs and tumor cells.
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Affiliation(s)
- Shigeo Koido
- Department of Internal Medicine, The Jikei University, Tokyo, Japan.
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Lu H, Yang Y, Gad E, Wenner CA, Chang A, Larson ER, Dang Y, Martzen M, Standish LJ, Disis ML. Polysaccharide krestin is a novel TLR2 agonist that mediates inhibition of tumor growth via stimulation of CD8 T cells and NK cells. Clin Cancer Res 2010; 17:67-76. [PMID: 21068144 DOI: 10.1158/1078-0432.ccr-10-1763] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE Polysaccharide krestin (PSK) is a mushroom extract that has been long used in Asia and recently in Western countries as a treatment for cancer due to its presumed immune potentiating effects. Although there have been reports of clinical responses after patients have ingested PSK, the mechanism of action of the agent remains undefined. The current study was undertaken to investigate the mechanism of the antitumor actions of PSK. EXPERIMENTAL DESIGN The immunostimulatory effect of PSK was first evaluated in vitro using splenocytes from neu transgenic mice and Toll-like receptor (TLR) 2 knockout (TLR2(-/-)) mice. Then the immunostimualtory and antitumor effect of PSK was determined using tumor-bearing neu transgenic mice, TLR2(-/-), and wild-type C57BL/6 mice. RESULTS We demonstrate that PSK is a selective TLR2 agonist, and the activation of dendritic cells (DC) and T cells by PSK is dependent on TLR2. Oral administration of PSK in neu transgenic mice significantly inhibits breast cancer growth. Selective depletion of specific cell populations suggests that the antitumor effect of PSK is dependent on both CD8(+) T cell and NK cells, but not CD4(+) T cells. PSK does not inhibit tumor growth in TLR2(-/-) mice suggesting that the antitumor effect is mediated by TLR2. CONCLUSION These results demonstrate that PSK, a natural product commonly used for the treatment of cancer, is a specific TLR2 agonist and has potent antitumor effects via stimulation of both innate and adaptive immune pathways.
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Affiliation(s)
- Hailing Lu
- Tumor Vaccine Group, Center for Translational Medicine in Women's Health, University of Washington, Seattle, Washington 98109, USA
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Regulation of tumor immunity by tumor/dendritic cell fusions. Clin Dev Immunol 2010; 2010:516768. [PMID: 21048993 PMCID: PMC2964897 DOI: 10.1155/2010/516768] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2010] [Accepted: 09/22/2010] [Indexed: 02/07/2023]
Abstract
The goal of cancer vaccines is to induce antitumor immunity that ultimately will reduce tumor burden in tumor environment. Several strategies involving dendritic cells- (DCs)- based vaccine incorporating different tumor-associated antigens to induce antitumor immune responses against tumors have been tested in clinical trials worldwide. Although DCs-based vaccine such as fusions of whole tumor cells and DCs has been proven to be clinically safe and is efficient to enhance antitumor immune responses for inducing effective immune response and for breaking T-cell tolerance to tumor-associated antigens (TAAs), only a limited success has occurred in clinical trials. This paper reviews tumor immune escape and current strategies employed in the field of tumor/DC fusions vaccine aimed at enhancing activation of TAAs-specific cytotoxic T cells in tumor microenvironment.
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Cho EI, Tan C, Koski GK, Cohen PA, Shu S, Lee WT. Toll-like receptor agonists as third signals for dendritic cell-tumor fusion vaccines. Head Neck 2010; 32:700-7. [PMID: 19908319 DOI: 10.1002/hed.21241] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND The aim of the present study was to evaluate the therapeutic efficacy of dendritic cell (DC)-tumor fusion hybrids with Toll-like receptor (TLR) agonists. METHODS DC-tumor fusion hybrids were generated by electrofusion and injected into the inguinal lymph nodes of C57BL/6 mice with 3-day established pulmonary metastases. Paired TLR agonists polyinosine:polycytadilic acid [poly(I:C)] and cytosine-phosphate-guanine (CpG) were then injected intraperitoneally. Enzyme-linked immunosorbent assay (ELISA) was used to evaluate interleukin (IL)-12 production from the DC-tumor fusion hybrids in vitro. RESULTS Fusion + TLR agonists (60 metastases) had significantly fewer metastases than did the untreated control (262 metastases, p = .0001) and fusion alone (150 metastases, p = .02). ELISA showed that the DC-tumor fusion hybrids yielded 90 pg of IL-12 after TLR stimulation compared with 1610 pg from dendritic cells alone. CONCLUSIONS CpG and poly(I:C) administered as a third signal with fusion hybrids as described significantly reduce melanoma metastasis compared with fusion hybrids alone. Fusion hybrids do not appear to be a significant source for IL-12 secretion.
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Affiliation(s)
- Edward I Cho
- Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio, USA
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Abstract
Toll-like receptors (TLRs) are part of the innate immune system, and they belong to the pattern recognition receptors (PRR) family. The PRR family is designed to recognize and bind conserved pathogen-associated molecular patterns, which are not generated by the host and are restricted and essential to micro-organisms. TLR9, which recognizes unmethylated CpG (cytosine guanosine dinucleotide), is a very promising target for therapeutic activation. Stimulation of TLR9 activates human plasmacytoid dendritic cells and B cells, and results in potent T helper-1 (T(h)1)-type immune responses and antitumor responses in mouse tumor models and in patients. Several pharmaceutical companies, such as Pfizer, Idera, and Dynavax, are developing CpG oligodeoxynucleotides (ODNs) for the treatment of cancer, along with other conditions, such as infections and allergy. CpG ODNs have shown promising results as vaccine adjuvants and in combination with cancer immunotherapy. Several TLR9 agonists are being developed and have entered clinical trials to evaluate their safety and efficacy for the treatment of several hematopoietic and solid tumors. In this review, we discuss the use of CpG ODNs in several phase I and II clinical trials for the treatment of NHL, renal cell carcinoma, melanoma, and non-small cell lung cancer, either alone or in combination with other agents.
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Affiliation(s)
- Yanal M Murad
- Duke University Medical Center, Department of Surgery, Program in Molecular Therapeutics, Comprehensive Cancer Center, 401 MSRB, Research Drive, Durham, NC 27710, USA
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Taylor PR, Koski GK, Paustian CC, Bailey E, Cohen PA, Moore FBG, Zimmerman DH, Rosenthal KS. J-LEAPS vaccines initiate murine Th1 responses by activating dendritic cells. Vaccine 2010; 28:5533-42. [PMID: 20600501 DOI: 10.1016/j.vaccine.2010.06.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2010] [Revised: 04/29/2010] [Accepted: 06/10/2010] [Indexed: 11/29/2022]
Abstract
The Ligand Epitope Antigen Presentation System (LEAPS) converts a peptide containing a T cell epitope as small as 8 amino acids into an immunogen and directs the nature of the subsequent response. Tandem synthesis of the J peptide (a peptide from the beta-2-microglobulin) with peptides of 15 or 30 amino acids from HSV-1 or HIV made them immunogenic and promoted Th1 immune responses. Immunization of A/J or C57BL/6 mice with J-LEAPS heteroconjugates containing an epitope from the HSV-1 glycoprotein D (JgD) or an epitope from the HIV gag protein (JH) emulsified with Seppic ISA51 induced increased levels of IL-12p70 by day 3 and increased levels of interferon gamma (IFN-gamma) on days 10 and 24. Interestingly, levels of IL-10, TNF-alpha, and IL-6 did not change. Neither the H nor the gD peptides alone elicited responses and only weak responses followed immunization with the J peptide. Bone marrow (BM) cells became CD86 and CD11c positive within 48 h of treatment with JgD or JH. JH or JgD treatment promoted IL-12p70 production and expression of CD8 denoting the maturation and activation of a subclass of myeloid DCs. Pure cultures of immature myeloid DCs also responded to JgD treatment, forming clusters, developing dendrites, and producing IL-12p70 within 24 h. The JH or JgD treated bone marrow cells (JgD-DC) were necessary and sufficient to activate splenic T cells to produce IFN-gamma and the JgD-DC provided an antigen specific booster response to T cells from JgD immunized mice. Adoptive transfer of JgD-DC was also sufficient to initiate protective antigen specific immunity from lethal challenge with HSV-1. The J-LEAPS vaccines appear to act as an adjuvant and immunogen on DC precursors in a unique manner to promote activation and maturation into IL-12p70 producing DCs which then can initiate sufficient Th1 immune responses to elicit protection without production of acute phase cytokines.
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Affiliation(s)
- P R Taylor
- Northeastern Ohio Universities Colleges of Medicine and Pharmacy, Rootstown, OH 44272, United States
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TLR-2 independent recognition of Mycobacterium tuberculosis by CD11c+ pulmonary cells from old mice. Mech Ageing Dev 2010; 131:405-14. [PMID: 20566357 DOI: 10.1016/j.mad.2010.05.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2009] [Revised: 04/30/2010] [Accepted: 05/20/2010] [Indexed: 01/06/2023]
Abstract
The elderly are particularly susceptible to infectious diseases such as influenza, bacterial pneumonia, and tuberculosis. Current vaccines are only partially protective in old age, which makes the elderly a critical target group for the development of new vaccine strategies. The recognition of pathogens via toll like receptors (TLR) and the subsequent generation of pro-inflammatory cytokines has generated interest in incorporating TLR agonists into new vaccines to enhance immunogenicity. However, TLR function is reportedly decreased in old age, leading to questions regarding the benefit of including TLR agonists into vaccines for the elderly. It is critical that we understand the function and role of TLRs in aged hosts prior to approving new TLR based adjuvants for vaccines that will be delivered to the elderly. In this study we determine the ability of TLRs on pulmonary macrophages from old mice to recognize and respond to infection with the virulent pathogen Mycobacterium tuberculosis (M. tb). Although pulmonary (CD11c(+)) cells from old mice were fully capable of producing cytokines in response to M. tb infection, we demonstrate that in contrast to young mice, M. tb induced cytokine production occurred independently of TLR-2. Our data indicate that the inclusion of TLR-2 agonists into new vaccines may not be fully effective in the elderly population. Investigation into such age-related differences in TLR function is of critical importance for the design of effective vaccines that will protect the elderly against infectious diseases.
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Avigan D, Tzachanis D. Cancer vaccines in hematologic malignancies: advances, challenges and therapeutic potential. Expert Rev Vaccines 2010; 9:451-4. [DOI: 10.1586/erv.10.44] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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36
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Antigen-specific polyclonal cytotoxic T lymphocytes induced by fusions of dendritic cells and tumor cells. J Biomed Biotechnol 2010; 2010:752381. [PMID: 20379390 PMCID: PMC2850552 DOI: 10.1155/2010/752381] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2009] [Revised: 01/21/2010] [Accepted: 02/01/2010] [Indexed: 01/26/2023] Open
Abstract
The aim of cancer vaccines is induction of tumor-specific cytotoxic T lymphocytes (CTLs) that can reduce the tumor mass. Dendritic cells (DCs) are potent antigen-presenting cells and play a central role in the initiation and regulation of primary immune responses. Thus, DCs-based vaccination represents a potentially powerful strategy for induction of antigen-specific CTLs. Fusions of DCs and whole tumor cells represent an alternative approach to deliver, process, and subsequently present a broad spectrum of antigens, including those known and unidentified, in the context of costimulatory molecules. Once DCs/tumor fusions have been infused back into patient, they migrate to secondary lymphoid organs, where the generation of antigen-specific polyclonal CTL responses occurs. We will discuss perspectives for future development of DCs/tumor fusions for CTL induction.
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Dendritic/pancreatic carcinoma fusions for clinical use: Comparative functional analysis of healthy- versus patient-derived fusions. Clin Immunol 2010; 135:384-400. [PMID: 20226739 DOI: 10.1016/j.clim.2010.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2009] [Revised: 02/06/2010] [Accepted: 02/09/2010] [Indexed: 12/13/2022]
Abstract
Fetal calf serum (FCS)-independent pancreatic cancer cells were established in plasma protein fraction (PPF)-supplemented medium that is an agent of good manufacturing practice (GMP) grade. Dendritic cells (DCs) were activated with the Toll-like receptor agonist, penicillin-inactivated Streptococcus pyogenes (OK-432) that is also a GMP grade agent. Therefore, sufficient amounts of FCS-independent fusions were successfully generated with decreased potential hazards of FCS. The FCS-independent fusions expressed tumor-associated antigens, HLA-DR, costimulatory molecules, IL-12, and IL-10. Stimulation of T cells with fusions from healthy donors resulted in proliferation of T cells with high expression levels of perforin/granzyme B and IFN-gamma and efficient induction of antigen-specific cytotoxic T lymphocytes (CTLs). Selection and expansion of T-cell clones were confirmed by TCR Vbeta analysis. However, fusions from patients with metastatic pancreatic cancer induced increased expression levels of TGF-beta1 in CD4+ CD25high T cells and low levels of CTLs with decreased IFN-gamma production.
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Taylor PR, Paustian CC, Koski GK, Zimmerman DH, Rosenthal KS. Maturation of dendritic cell precursors into IL12-producing DCs by J-LEAPS immunogens. Cell Immunol 2010; 262:1-5. [PMID: 20163792 DOI: 10.1016/j.cellimm.2010.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 01/21/2010] [Accepted: 01/22/2010] [Indexed: 11/30/2022]
Abstract
LEAPS (ligand epitope antigen presentation system) vaccines consist of a peptide containing a major histocompatibility antigen binding peptide conjugated to an immune cell binding ligand (ICBL) such as the 'J' peptide from beta-2-microglobulin. Treatment of monocytes, monocytes plus GMCSF, or monocytes plus GMCSF and IL4 with JgD (containing a peptide from gD of herpes simplex virus type 1) or JH (with a peptide from HIV p17 gag protein) was sufficient to promote their maturation into Interleukin 12 producing dendritic cells. JgD-dendritic cells supported allotypic activation of T cells to produce Th1-related cytokines.
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Affiliation(s)
- Patricia R Taylor
- Northeastern Ohio Universities Colleges of Medicine and Pharmacy, Rootstown, OH 44272, USA
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Double stranded RNA- relative to other TLR ligand-activated dendritic cells induce extremely polarized human Th1 responses. Cell Immunol 2010; 264:119-26. [DOI: 10.1016/j.cellimm.2010.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 05/11/2010] [Accepted: 05/17/2010] [Indexed: 01/25/2023]
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40
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Stone GW, Barzee S, Snarsky V, Santucci C, Tran B, Langer R, Zugates GT, Anderson DG, Kornbluth RS. Nanoparticle-delivered multimeric soluble CD40L DNA combined with Toll-Like Receptor agonists as a treatment for melanoma. PLoS One 2009; 4:e7334. [PMID: 19812695 PMCID: PMC2754331 DOI: 10.1371/journal.pone.0007334] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Accepted: 09/16/2009] [Indexed: 01/08/2023] Open
Abstract
Stimulation of CD40 or Toll-Like Receptors (TLR) has potential for tumor immunotherapy. Combinations of CD40 and TLR stimulation can be synergistic, resulting in even stronger dendritic cell (DC) and CD8+ T cell responses. To evaluate such combinations, established B16F10 melanoma tumors were injected every other day X 5 with plasmid DNA encoding a multimeric, soluble form of CD40L (pSP-D-CD40L) either alone or combined with an agonist for TLR1/2 (Pam3CSK4 ), TLR2/6 (FSL-1 and MALP2), TLR3 (polyinosinic-polycytidylic acid, poly(I:C)), TLR4 ( monophosphoryl lipid A, MPL), TLR7 (imiquimod), or TLR9 (Class B CpG phosphorothioate oligodeoxynucleotide, CpG). When used by itself, pSP-D-CD40L slowed tumor growth and prolonged survival, but did not lead to cure. Of the TLR agonists, CpG and poly(I:C) also slowed tumor growth, and the combination of these two TLR agonists was more effective than either agent alone. The triple combination of intratumoral pSP-D-CD40L + CpG + poly(I:C) markedly slowed tumor growth and prolonged survival. This treatment was associated with a reduction in intratumoral CD11c+ dendritic cells and an influx of CD8+ T cells. Since intratumoral injection of plasmid DNA does not lead to efficient transgene expression, pSP-D-CD40L was also tested with cationic polymers that form DNA-containing nanoparticles which lead to enhanced intratumoral gene expression. Intratumoral injections of pSP-D-CD40L-containing nanoparticles formed from polyethylenimine (PEI) or C32 (a novel biodegradable poly(B-amino esters) polymer) in combination with CpG + poly(I:C) had dramatic antitumor effects and frequently cured mice of B16F10 tumors. These data confirm and extend previous reports that CD40 and TLR agonists are synergistic and demonstrate that this combination of immunostimulants can significantly suppress tumor growth in mice. In addition, the enhanced effectiveness of nanoparticle formulations of DNA encoding immunostimulatory molecules such as multimeric, soluble CD40L supports the further study of this technology for tumor immunotherapy.
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Affiliation(s)
- Geoffrey W. Stone
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
- Department of Medicine, VA San Diego Healthcare System, La Jolla, California, United States of America
| | - Suzanne Barzee
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
- Department of Medicine, VA San Diego Healthcare System, La Jolla, California, United States of America
| | - Victoria Snarsky
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
- Department of Medicine, VA San Diego Healthcare System, La Jolla, California, United States of America
| | - Camila Santucci
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
- Department of Medicine, VA San Diego Healthcare System, La Jolla, California, United States of America
| | - Brian Tran
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
- Department of Medicine, VA San Diego Healthcare System, La Jolla, California, United States of America
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts, United States of America
- Chemical Engineering Department, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Gregory T. Zugates
- David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts, United States of America
| | - Daniel G. Anderson
- David H. Koch Institute for Integrative Cancer Research at MIT, Cambridge, Massachusetts, United States of America
| | - Richard S. Kornbluth
- Department of Medicine, University of California San Diego, La Jolla, California, United States of America
- Department of Medicine, VA San Diego Healthcare System, La Jolla, California, United States of America
- * E-mail:
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Regression of established AB1 murine mesothelioma induced by peritumoral injections of CpG oligodeoxynucleotide either alone or in combination with poly(I:C) and CD40 ligand plasmid DNA. J Thorac Oncol 2009; 4:802-8. [PMID: 19550243 DOI: 10.1097/jto.0b013e3181a8634d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Stimulation of the CD40 receptor using an agonistic anti-CD40 antibody can slow the growth of AB1 tumors. Stimulation of the GITR receptor may also have antitumor activity by countering the immunosuppressive effects of regulatory CD4 T cells. Similarly, agonists for Toll-Like Receptors (TLR) such as CpG oligodeoxynucleotides (TLR9 agonist) have activity against AB1 tumors. Combinations of CpG with CD40 ligand and polyinosinic-polycytidylic acid (poly(I:C), TLR3 agonist) may be even stronger than CpG alone. The synergistic effects of these combinations have been tested in other tumor types but not in mesothelioma. METHODS Established AB1 mesothelioma tumors were injected with either plasmid DNA encoding a novel 4-trimer form of murine CD40 ligand (pSP-D-CD40L), GITR ligand (GITRL), or control plasmid DNA. In addition, CpG with or without poly(I:C) was also injected intratumorally. RESULTS Plasmid injections of pSP-D-CD40L or pSP-D-GITRL, had no significant antitumor effect, possibly reflecting the difficulty of administering DNA injections into this very dense tissue. However, the injection of CpG with or without poly(I:C) strongly suppressed tumor growth and led to long-term tumor-free survival. The response to a triple combination of pSP-D-CD40L + CpG + poly(I:C) was demonstrated by an increase in intratumoral CD8 T cells and a dramatic increase in F4/80 macrophages. CONCLUSIONS Intratumoral injections of plasmid DNAs encoding highly active forms of either CD40 ligand or GITR ligand had no significant antitumor effects in this model, although improved DNA delivery techniques could possibly improve this strategy. In contrast, intratumoral CpG injections had significant antitumor effects and there were indications that CpG plus poly(I:C) was even more effective. Taken together, these data confirm previous reports that immune stimulants, especially CpG TLR9 agonists, have potential as a treatment for mesothelioma.
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Huebener N, Fest S, Hilt K, Schramm A, Eggert A, Durmus T, Woehler A, Stermann A, Bleeke M, Baykan B, Weixler S, Gaedicke G, Lode HN. Xenogeneic immunization with human tyrosine hydroxylase DNA vaccines suppresses growth of established neuroblastoma. Mol Cancer Ther 2009; 8:2392-401. [PMID: 19671753 DOI: 10.1158/1535-7163.mct-09-0107] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Neuroblastoma (NB) is a challenging malignancy of the sympathetic nervous tissue characterized by a very poor prognosis. One important marker for NB is the expression of tyrosine hydroxylase (TH), the first-step enzyme of catecholamine biosynthesis. We could show stable and high TH gene expression in 67 NB samples independent of the clinical stage. Based on this observation, we addressed the question of whether xenogeneic TH DNA vaccination is effective in inducing an anti-NB immune response. For this purpose, we generated three DNA vaccines based on pCMV-F3Ub and pBUD-CE4.1 plasmids encoding for human (h)THcDNA (A), hTH minigene (B), and hTHcDNA in combination with the proinflammatory cytokine interleukin 12 (C), and tested prophylactic and therapeutic efficacy to suppress primary tumor growth and spontaneous metastasis. Here we report that xenogeneic TH DNA vaccination was effective in eradicating established primary tumors and inhibiting metastasis. Interestingly, this effect could not be enhanced by adding the Th1 cytokine interleukin 12. However, increased IFN-gamma production and NB cytotoxicity of effector cells harvested from vaccinated mice suggested the participation of tumor-specific CTLs in the immune response. The depletion of CD8(+)T cells completely abrogated the hTH vaccine-mediated anti-NB immune response. Furthermore, rechallenging of surviving mice resulted in reduced primary tumor growth, indicating the induction of a memory immune response. In conclusion, xenogeneic immunization with TH-derived DNA vaccines is effective against NB, and may open a new venue for a novel and effective immunotherapeutic strategy against this challenging childhood tumor.
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Affiliation(s)
- Nicole Huebener
- Department of Pediatrics, Allergy Center Charité, Charité-University Medicine Berlin, Berlin, Germany
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Grossmann C, Tenbusch M, Nchinda G, Temchura V, Nabi G, Stone GW, Kornbluth RS, Uberla K. Enhancement of the priming efficacy of DNA vaccines encoding dendritic cell-targeted antigens by synergistic toll-like receptor ligands. BMC Immunol 2009; 10:43. [PMID: 19650904 PMCID: PMC2731061 DOI: 10.1186/1471-2172-10-43] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2009] [Accepted: 08/03/2009] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Targeting of protein antigens to dendritic cells (DC) via the DEC205 receptor enhances presentation of antigen-derived peptides on MHC-I and MHC-II molecules and, in the presence of costimulatory signals, antigen-specific immune responses. The immunogenicity and efficacy of DNA vaccination can also be enhanced by fusing the encoded antigen to single chain antibodies directed against DEC205. To further improve this strategy, we evaluated different toll-like receptor ligands (TLR) and CD40 ligands (CD40L) as adjuvants for DNA vaccines encoding a DEC205-single-chain antibody fused to the ovalbumin model antigen or HIV-1 Gag and assessed the priming efficacy of DNA in a DNA prime adenoviral vector boost immunization regimen. RESULTS Mice were primed with the adjuvanted DEC-205 targeted DNA vaccines and boosted with adenoviral vectors encoding the same antigens. CD8+ T cell responses were determined after the adenoviral booster immunization, to determine how well the different DNA immunization regimens prime for the adenoviral boost. In the absence of adjuvants, targeting of DNA-encoded ovalbumin to DCs suppressed CD8+ T-cell responses after the adenoviral booster immunization. CD8+ T-cell responses to the DEC205 targeted DNA vaccines increased only slightly by adding either the TLR-9 ligand CpG, the TLR-3 ligand Poly I:C, or CD40 ligand expression plasmids. However, the combination of both TLR-ligands led to a strong enhancement of CD8+ T-cell responses compared to a non-targeted DNA vaccine. This finding was confirmed using HIV Gag as antigen. CONCLUSION Although DNA prime adenoviral vector boost immunizations belong to the strongest inducers of cytotoxic T cell responses in different animal models and humans, the CD8+ T cell responses can be further improved by targeting the DNA encoded antigen to DEC205 in the presence of synergistic TLR ligands CpG and Poly I:C.
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Affiliation(s)
- Claudius Grossmann
- Department of Molecular and Medical Virology, Ruhr-Universität Bochum, Universitätsstrasse 150, 44801 Bochum, Germany.
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Global changes in gene expression and synergistic interactions induced by TLR9 and TLR3. Mol Immunol 2009; 46:2557-64. [PMID: 19535142 DOI: 10.1016/j.molimm.2009.05.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 04/15/2009] [Accepted: 05/11/2009] [Indexed: 11/24/2022]
Abstract
The innate immune system is triggered when pathogen-associated molecular patterns (PAMPs) expressed by infectious microorganisms interact with toll-like receptors (TLR) present on immune cells. Individual TLRs signal through distinct molecular pathways. For example, TLR9 interacts with unmethylated CpG motifs expressed by bacterial DNA and triggers via a MyD88 dependent pathway whereas TLR3 recognizes viral RNA through a MyD88-independent pathway. Bioinformatic analysis of microarray data was used to identify the regulatory patterns underlying changes in gene expression induced when RAW 264.7 macrophages were stimulated via TLR9 by CpG oligonucleotides (ODN) and/or via TLR3 by poly (I:C). While the genes activated by each ligand mediated similar functions, poly (I:C) elicited a larger and more diverse change in gene expression. Co-stimulation with both ligands accelerated gene expression and synergistically activated genes primarily associated with immune function. This is the first work to compare global changes in gene regulation triggered by distinct TLR pathways and clarify their impact on gene expression.
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Chang CC, Liu Z, Vlad G, Qin H, Qiao X, Mancini DM, Marboe CC, Cortesini R, Suciu-Foca N. Ig-like transcript 3 regulates expression of proinflammatory cytokines and migration of activated T cells. THE JOURNAL OF IMMUNOLOGY 2009; 182:5208-16. [PMID: 19380766 DOI: 10.4049/jimmunol.0804048] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Ig-like transcript 3 (ILT3), an inhibitory receptor expressed by APC is involved in functional shaping of T cell responses toward a tolerant state. We have previously demonstrated that membrane (m) and soluble (s) ILT3 induce allogeneic tolerance to human islet cells in humanized NOD/SCID mice. Recombinant sILT3 induces the differentiation of CD8(+) T suppressor cells both in vivo and in vitro. To better understand the molecular mechanisms by which ILT3 suppresses immune responses, we have generated ILT3 knockdown (ILT3KD) dendritic cells (DC) and analyzed the phenotypic and functional characteristics of these cells. In this study, we report that silencing of ILT3 expression in DC (ILT3KD DC) increases TLR responsiveness to their specific ligands as reflected in increased synthesis and secretion of proinflammatory cytokines such as IL-1alpha, IL-1beta, and IL-6 and type I IFN. ILT3KD-DC also secretes more CXCL10 and CXCL11 chemokines in response to TLR ligation, thus accelerating T cell migration in diffusion chamber experiments. ILT3KD-DC elicit increased T cell proliferation and synthesis of proinflammatory cytokines IFN-gamma and IL-17A both in MLC and in culture with autologous DC pulsed with CMV protein. ILT3 signaling results in inhibition of NF-kappaB and, to a lesser extent, MAPK p38 pathways in DC. Our results suggest that ILT3 plays a critical role in the control of inflammation.
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Affiliation(s)
- Chih-Chao Chang
- Department of Pathology, Columbia University, NewYork, NY 10032, USA
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Yagui-Beltrán A, Coussens LM, Jablons DM. Respiratory Homeostasis and Exploitation of the Immune System for Lung Cancer Vaccines. ACTA ACUST UNITED AC 2009; 58:40-48. [PMID: 22368692 DOI: 10.17925/ohr.2009.05.1.40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Lung cancer is the leading cause of all cancer deaths in the US. The international scientific and clinical community has made significant advances toward understanding specific molecular mechanisms underlying lung carcinogenesis; however, despite these insights and advances in surgery and chemoradiotherapy, the prognosis for non-small-cell lung cancer (NSCLC) remains poor. Nonetheless, significant effort is being focused on advancing translational research evaluating the efficacy of novel targeted therapeutic strategies for lung cancer. Illustrative examples of this include antagonists of the epidermal growth factor receptor (EGFR), tyrosine kinase inhibitors (TKIs) such as gefitinib and erlotinib, and a diverse assortment of anti-angiogenic compounds targeting growth factors and/or their receptors that regulate tumor-associated angiogenic programs. In addition, with the increased awareness of the significant role chronically activated leukocytes play as potentiators of solid-tumor development, the role of innate and adaptive immune cells as regulators of lung carcinogenesis is being examined. While some of these studies are examining how novel therapeutic strategies may enhance the efficacy of lung cancer vaccines, others are evaluating the intrinsic characteristics of the immune response to lung cancer in order to identify rate-limiting molecular and/or cellular programs to target with novel anticancer therapeutics. In this article, we explore important aspects of the immune system and its role in regulating normal respiratory homeostasis compared with the immune response accompanying development of lung cancer. These hallmarks are then discussed in the context of recent efforts to develop lung cancer vaccines, where we have highlighted important concepts that must be taken into consideration for future development of novel therapeutic strategies and clinical trials assessing their efficacy.
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Affiliation(s)
- Adam Yagui-Beltrán
- Post-doctoral Fellow, Helen Diller Family Comprehensive Cancer Center, University of California San Francisco
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