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Wang Z, Zhang H, Qi C, Guo H, Jiao X, Yan J, Wang Y, Li Q, Zhao M, Guo X, Wan B, Li X. Ursolic acid ameliorates DNCB-induced atopic dermatitis-like symptoms in mice by regulating TLR4/NF-κB and Nrf2/HO-1 signaling pathways. Int Immunopharmacol 2023; 118:110079. [PMID: 36996741 DOI: 10.1016/j.intimp.2023.110079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/09/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023]
Abstract
BACKGROUND Ursolic acid (UA) is a triterpenoid compound found in natural plants. It has been reported to have anti-inflammatory, antioxidant, and immunomodulatory properties. However, its role in atopic dermatitis (AD) is unknown. This study aimed to evaluate the therapeutic effect of UA in AD mice and explore the underlying mechanisms. METHODS Balb/c mice were treated with 2, 4-dinitrochlorobenzene (DNCB) to induce AD-like lesions. During modeling and medication administration, dermatitis scores and ear thickness were measured. Subsequently, histopathological changes, levels of T helper cytokines, and oxidative stress markers levels were evaluated. Immunohistochemistry staining was used to assess changes in the expression of the nuclear factor of kappa B (NF-κB) and NF erythroid 2-related factor 2 (Nrf2). Furthermore, CCK8 assay, reactive oxygen species (ROS) assay, real-time PCR, and western blotting were employed to evaluate the effects of UA on ROS levels, inflammatory mediator production, and the NF-κB and Nrf2 pathways in TNF-α/IFN-γ-stimulated HaCaT cells. RESULTS The results showed that UA significantly reduced dermatitis score and ear thickness, effectively inhibited skin proliferation and mast cell infiltration in AD mice, and decreased the expression level of T helper cytokines. Meanwhile, UA improved oxidative stress in AD mice by regulating lipid peroxidation and increasing the activity of antioxidant enzymes. In addition, UA inhibited ROS accumulation and chemokine secretion in TNF-α/IFN-γ-stimulated HaCaT cells. It might exert anti-dermatitis effects by inhibiting the TLR4/NF-κB pathway and activating the Nrf2/HO-1 pathway. CONCLUSION Taken together, our results suggest that UA may have potential therapeutic effects on AD and could be further studied as a promising drug for AD treatment.
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Affiliation(s)
- Zhehuan Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Huiru Zhang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Caihong Qi
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Hui Guo
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Xiangyue Jiao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Jia Yan
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Yifei Wang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Qiangsheng Li
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Mingming Zhao
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Xinhao Guo
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China
| | - Baoluo Wan
- Henan Provincial People's Hospital, Zhengzhou 450001, Henan Province, China.
| | - Xiaotian Li
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan Province, China.
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Kiessling A, Ramanathan K, Nilsson OB, Notari L, Renken S, Kiessling R, Grönlund H, Wickström SL. Generation of Tumor-Specific Cytotoxic T Cells From Blood via In Vitro Expansion Using Autologous Dendritic Cells Pulsed With Neoantigen-Coupled Microbeads. Front Oncol 2022; 12:866763. [PMID: 35433456 PMCID: PMC9009257 DOI: 10.3389/fonc.2022.866763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
For the past decade, adoptive cell therapy including tumor-infiltrating lymphocytes, genetically modified cytotoxic lymphocytes expressing a chimeric antigen receptor, or a novel T-cell receptor has revolutionized the treatment of many cancers. Progress within exome sequencing and neoantigen prediction technologies provides opportunities for further development of personalized immunotherapies. In this study, we present a novel strategy to deliver in silico predicted neoantigens to autologous dendritic cells (DCs) using paramagnetic beads (EpiTCer beads). DCs pulsed with EpiTCer beads are superior in enriching for healthy donor and patient blood-derived tumor-specific CD8+ T cells compared to DC loaded with whole-tumor lysate or 9mer neoantigen peptides. A dose-dependent effect was observed, with higher EpiTCer bead per DC being favorable. We concluded that CD8+ T cells enriched by DC loaded with EpiTCer beads are tumor specific with limited tumor cross-reactivity and low recognition of autologous non-activated monocytes or CD8+ T cells. Furthermore, tumor specificity and recognition were improved and preserved after additional expansion using our Good Manufacturing Process (GMP)-compatible rapid expansion protocol. Phenotypic analysis of patient-derived EpiTCer DC expanded CD8+ T cells revealed efficient maturation, with high frequencies of central memory and effector memory T cells, similar to those observed in autologous expanded tumor-infiltrating lymphocytes. These results indicate that DC pulsed with EpiTCer beads enrich for a T-cell population with high capacity of tumor recognition and elimination, which are features needed for a T-cell product to be used for personalized adoptive cell therapy.
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Affiliation(s)
- Adela Kiessling
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | | | - Ola B. Nilsson
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- NEOGAP Therapeutics AB, Stockholm, Sweden
| | - Luigi Notari
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- NEOGAP Therapeutics AB, Stockholm, Sweden
| | - Stefanie Renken
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Rolf Kiessling
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Theme Cancer, Patient Area Head and Neck, Lung and Skin, Karolinska University Hospital, Stockholm, Sweden
| | - Hans Grönlund
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- NEOGAP Therapeutics AB, Stockholm, Sweden
| | - Stina L. Wickström
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- NEOGAP Therapeutics AB, Stockholm, Sweden
- Theme Cancer, Patient Area Head and Neck, Lung and Skin, Karolinska University Hospital, Stockholm, Sweden
- *Correspondence: Stina L. Wickström,
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3
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Alam MM, Jarvis CM, Hincapie R, McKay CS, Schimer J, Sanhueza-Chavez CA, Xu K, Diehl RC, Finn MG, Kiessling LL. Glycan-Modified Virus-like Particles Evoke T Helper Type 1-like Immune Responses. ACS NANO 2021; 15:309-321. [PMID: 32790346 PMCID: PMC8249087 DOI: 10.1021/acsnano.0c03023] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Dendritic cells (DCs) are highly effective antigen-presenting cells that shape immune responses. Vaccines that deliver antigen to the DCs can harness their power. DC surface lectins recognize glycans not typically present on host tissue to facilitate antigen uptake and presentation. Vaccines that target these surface lectins should offer improved antigen delivery, but their efficacy will depend on how lectin targeting influences the T cell subtypes that result. We examined how antigen structure influences uptake and signaling from the C-type lectin DC-SIGN (dendritic cell-specific intercellular adhesion molecule-3-grabbing nonintegrin or CD209). Virus-like particles (VLPs) were engineered from bacteriophage Qβ to present an array of mannoside ligands. The VLPs were taken up by DCs and efficiently trafficked to endosomes. The signaling that ensued depended on the ligand displayed on the VLP: only those particles densely functionalized with an aryl mannoside, Qβ-Man540, elicited DC maturation and induced the expression of the proinflammatory cytokines characteristic of a T helper type 1 (TH1)-like immune response. This effect was traced to differential binding to DC-SIGN at the acidic pH of the endosome. Mice immunized with a VLP bearing the aryl mannoside, and a peptide antigen (Qβ-Ova-Man540) had antigen-specific responses, including the production of CD4+ T cells producing the activating cytokines interferon-γ and tumor necrosis factor-α. A TH1 response is critical for intracellular pathogens (e.g., viruses) and cancer; thus, our data highlight the value of targeting DC lectins for antigen delivery and validate the utility of DC-targeted VLPs as vaccine vehicles that induce cellular immunity.
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Affiliation(s)
- Mohammad Murshid Alam
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139 USA
| | - Cassie M. Jarvis
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139 USA
| | - Robert Hincapie
- School of Chemistry and Biochemistry and School of Biological Sciences, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332, USA
| | - Craig S. McKay
- School of Chemistry and Biochemistry and School of Biological Sciences, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332, USA
| | - Jiri Schimer
- School of Chemistry and Biochemistry and School of Biological Sciences, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332, USA
| | - Carlos A Sanhueza-Chavez
- School of Chemistry and Biochemistry and School of Biological Sciences, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332, USA
- Current address: Department of Pharmaceutical Sciences, St. John’s University, 8000 Utopia Pkwy. Queens, NY 11439, USA
| | - Ke Xu
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - Roger C Diehl
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139 USA
| | - M. G. Finn
- School of Chemistry and Biochemistry and School of Biological Sciences, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA, 30332, USA
| | - Laura L. Kiessling
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139 USA
- Corresponding Author: Laura L. Kiessling,
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4
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Bronge M, Ruhrmann S, Carvalho-Queiroz C, Nilsson OB, Kaiser A, Holmgren E, Macrini C, Winklmeier S, Meinl E, Brundin L, Khademi M, Olsson T, Gafvelin G, Grönlund H. Myelin oligodendrocyte glycoprotein revisited-sensitive detection of MOG-specific T-cells in multiple sclerosis. J Autoimmun 2019; 102:38-49. [PMID: 31054941 DOI: 10.1016/j.jaut.2019.04.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/09/2019] [Accepted: 04/12/2019] [Indexed: 12/20/2022]
Abstract
Autoreactive CD4+ T-cells are believed to be a main driver of multiple sclerosis (MS). Myelin oligodendrocyte glycoprotein (MOG) is considered an autoantigen, yet doubted in recent years. The reason is in part due to low frequency and titers of MOG autoantibodies and the challenge to detect MOG-specific T-cells. In this study we aimed to analyze T-cell reactivity and frequency utilizing a novel method for detection of antigen-specific T-cells with bead-bound MOG as stimulant. Peripheral blood mononuclear cells (PBMCs) from natalizumab treated persons with MS (n = 52) and healthy controls (HCs) (n = 24) were analyzed by IFNγ/IL-22/IL-17A FluoroSpot. A higher number of IFNγ (P = 0.001), IL-22 (P = 0.003), IL-17A (P < 0.0001) as well as double and triple cytokine producing MOG-specific T-cells were detected in persons with MS compared to HCs. Of the patients, 46.2-59.6% displayed MOG-reactivity. Depletion of CD4+ T-cells or monocytes or blocking HLA-DR completely eliminated the MOG specific response. Anti-MOG antibodies did not correlate with T-cell MOG-responses. In conclusion, we present a sensitive method to detect circulating autoreactive CD4+ T-cells producing IFNγ, IL-22 or IL-17A using MOG as a model antigen. Further, we demonstrate that MOG-specific T-cells are present in approximately half of persons with MS.
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Affiliation(s)
- Mattias Bronge
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
| | - Sabrina Ruhrmann
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
| | - Claudia Carvalho-Queiroz
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
| | - Ola B Nilsson
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
| | - Andreas Kaiser
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
| | - Erik Holmgren
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
| | - Caterina Macrini
- Institute of Clinical Neuroimmunology, Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München, Großhaderner Str. 9, 821 52, Planegg-Martinsried, Germany.
| | - Stephan Winklmeier
- Institute of Clinical Neuroimmunology, Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München, Großhaderner Str. 9, 821 52, Planegg-Martinsried, Germany.
| | - Edgar Meinl
- Institute of Clinical Neuroimmunology, Biomedical Center and University Hospitals, Ludwig-Maximilians-Universität München, Großhaderner Str. 9, 821 52, Planegg-Martinsried, Germany.
| | - Lou Brundin
- Neuroimmunology Unit, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:04, 171 76, Stockholm, Sweden.
| | - Mohsen Khademi
- Neuroimmunology Unit, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:04, 171 76, Stockholm, Sweden.
| | - Tomas Olsson
- Neuroimmunology Unit, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:04, 171 76, Stockholm, Sweden.
| | - Guro Gafvelin
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
| | - Hans Grönlund
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden.
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5
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Bronge M, Kaiser A, Carvalho-Queiroz C, Nilsson OB, Ruhrmann S, Holmgren E, Olsson T, Gafvelin G, Grönlund H. Sensitive detection of antigen-specific T-cells using bead-bound antigen for in vitro re-stimulation. MethodsX 2019; 6:1635-1641. [PMID: 31367530 PMCID: PMC6651840 DOI: 10.1016/j.mex.2019.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 07/02/2019] [Indexed: 01/27/2023] Open
Abstract
Reliable and sensitive detection of antigen specific cells is essential in several fields of research, whether it concerns monitoring responses to infectious agents or exploring the auto-antigen repertoire in autoimmune diseases. Identification of these cells is however difficult, especially when the cells often are rare and methods not sensitive, specific or practical enough. We propose a novel method of processing antigens before stimulation of cells which consists of covalently binding protein antigen to superparamagnetic micro-beads and using denaturing washes to remove contaminants. Peripheral blood mononuclear cells (PBMCs) from healthy donors were stimulated using both cytomegalovirus and tetanus-diphtheria antigen-beads as well as non-antigenic protein-beads as negative control in an IFNγ FluoroSpot assay in order to detect Th1 and CD8+ responses. The responses toward the antigen beads were both antigen specific and sensitive, with a detection threshold of 1 IFNγ producing T-cell per 18,000 PBMCs. Covalently binding antigen to paramagnetic beads allows for harsh denaturing washes without loss of antigen. Microbeads are phagocytosed by antigen presenting cells, resulting in efficient uptake, processing and presentation of the antigens. The method allows the usage of relatively impure starting antigen material and whole PBMC samples without high background levels in follow up cellular assays.
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Affiliation(s)
- Mattias Bronge
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
- Corresponding author.
| | - Andreas Kaiser
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
| | - Claudia Carvalho-Queiroz
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
| | - Ola B. Nilsson
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
| | - Sabrina Ruhrmann
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
| | - Erik Holmgren
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
| | - Tomas Olsson
- Neuroimmunology Unit, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:04, 171 76, Stockholm, Sweden
| | - Guro Gafvelin
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
| | - Hans Grönlund
- Therapeutic Immune Design, Department of Clinical Neuroscience, Karolinska Institutet, Center for Molecular Medicine L8:02, 171 76, Stockholm, Sweden
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Molinari P, Peralta A, Maletto BA, Pistoresi-Palencia MC, Crespo MI, Morón G, Taboga O. Double-layered rotavirus-like particles are efficient carriers to elicit strong CTL responses to delivered heterologous antigens. Process Biochem 2014. [DOI: 10.1016/j.procbio.2014.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Alami Chentoufi A, Kritzer E, Yu DM, Nesburn AB, BenMohamed L. Towards a rational design of an asymptomatic clinical herpes vaccine: the old, the new, and the unknown. Clin Dev Immunol 2012; 2012:187585. [PMID: 22548113 PMCID: PMC3324142 DOI: 10.1155/2012/187585] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 01/10/2012] [Indexed: 11/17/2022]
Abstract
The best hope of controlling the herpes simplex virus type 1 and type 2 (HSV-1 and HSV-2) pandemic is the development of an effective vaccine. However, in spite of several clinical trials, starting as early as 1920s, no vaccine has been proven sufficiently safe and efficient to warrant commercial development. In recent years, great strides in cellular and molecular immunology have stimulated creative efforts in controlling herpes infection and disease. However, before moving towards new vaccine strategy, it is necessary to answer two fundamental questions: (i) why past herpes vaccines have failed? (ii) Why the majority of HSV seropositive individuals (i.e., asymptomatic individuals) are naturally "protected" exhibiting few or no recurrent clinical disease, while other HSV seropositive individuals (i.e., symptomatic individuals) have frequent ocular, orofacial, and/or genital herpes clinical episodes? We recently discovered several discrete sets of HSV-1 symptomatic and asymptomatic epitopes recognized by CD4(+) and CD8(+) T cells from seropositive symptomatic versus asymptomatic individuals. These asymptomatic epitopes will provide a solid foundation for the development of novel herpes epitope-based vaccine strategy. Here we provide a brief overview of past clinical vaccine trials, outline current progress towards developing a new generation "asymptomatic" clinical herpes vaccines, and discuss future mucosal "asymptomatic" prime-boost vaccines that could optimize local protective immunity.
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Affiliation(s)
- Aziz Alami Chentoufi
- Laboratory of Cellular and Molecular Immunology, School of Medicine, University of California, Irvine, Irvine, CA 92697-4375, USA
- Department of Immunology, Pathology and Clinical Laboratory Medicine, King Fahad Medical City, Riyadh 11525, Saudi Arabia
| | - Elizabeth Kritzer
- Laboratory of Cellular and Molecular Immunology, School of Medicine, University of California, Irvine, Irvine, CA 92697-4375, USA
| | - David M. Yu
- Laboratory of Cellular and Molecular Immunology, School of Medicine, University of California, Irvine, Irvine, CA 92697-4375, USA
| | - Anthony B. Nesburn
- Laboratory of Cellular and Molecular Immunology, School of Medicine, University of California, Irvine, Irvine, CA 92697-4375, USA
| | - Lbachir BenMohamed
- Laboratory of Cellular and Molecular Immunology, School of Medicine, University of California, Irvine, Irvine, CA 92697-4375, USA
- Institute for Immunology, School of Medicine, University of California, Irvine, Irvine, CA 92697-4120, USA
- Chao Family Comprehensive Cancer Center, University of California, Irvine Medical Center, Irvine, CA 92868-3201, USA
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8
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Abstract
Ultrafine particles and engineered nanoparticles have unique aerodynamic and biochemical properties that affect the immune system and human health in ways that are different from or exceed those seen with gases or larger particulates. These effects result from a unique set of physical characteristics and surface moieties, which generate an ability of UFPs to enter tissues and cells, interact with proteins and DNA at a molecular level and directly and indirectly modulate the immune system by novel mechanisms. In recent years, a new field known as nanotechnology has impacted multiple industries by taking advantage of the special qualities of these small "atomic-sized" particles. Nanomedicine has already opened up a new avenue of research in cancer therapy, drug delivery and immune regulation. While the benefits of this new science to human civilization are seemingly immeasurable, it is also important to appreciate that these particles can also lead to harmful effects on human health. In vitro and animal studies are showing that nanoparticles and UFPs are capable of activating proinflammatory cytokines, chemokines and adhesion molecules, with recruitment of inflammatory cells including basophils, macrophages, dendritic cells, T cells, neutrophils and eosinophils. These changes may have an impact on immune defense, but also on the Th1/Th2 balance, and even on non-immunologic function. Resulting immune system derangement can lead to increases in incidence of autoimmune, allergic and even neoplastic diseases. Cardiorespiratory effects have been observed to occur in humans. Much further research is needed to establish safe exposure levels for this important new class of particulates.
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Affiliation(s)
- Christopher Chang
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis School of Medicine, 451 Health Sciences Drive, Suite 6510, Davis, CA 95616, USA.
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9
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Wilson-Welder JH, Torres MP, Kipper MJ, Mallapragada SK, Wannemuehler MJ, Narasimhan B. Vaccine adjuvants: current challenges and future approaches. J Pharm Sci 2009; 98:1278-316. [PMID: 18704954 PMCID: PMC8092333 DOI: 10.1002/jps.21523] [Citation(s) in RCA: 184] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
For humans, companion animals, and food producing animals, vaccination has been touted as the most successful medical intervention for the prevention of disease in the twentieth century. However, vaccination is not without problems. With the development of new and less reactogenic vaccine antigens, which take advantage of molecular recombinant technologies, also comes the need for more effective adjuvants that will facilitate the induction of adaptive immune responses. Furthermore, current vaccine adjuvants are successful at generating humoral or antibody mediated protection but many diseases currently plaguing humans and animals, such as tuberculosis and malaria, require cell mediated immunity for adequate protection. A comprehensive discussion is presented of current vaccine adjuvants, their effects on the induction of immune responses, and vaccine adjuvants that have shown promise in recent literature.
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Affiliation(s)
- Jennifer H Wilson-Welder
- Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, Iowa 50011, USA
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10
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Mallapragada SK, Narasimhan B. Immunomodulatory biomaterials. Int J Pharm 2008; 364:265-71. [DOI: 10.1016/j.ijpharm.2008.06.030] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2008] [Revised: 06/20/2008] [Accepted: 06/25/2008] [Indexed: 12/26/2022]
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11
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Oliveira FM, Dos Santos EM, Alves AC, Campana-Pereira MA, Ramaldes GA, Cardoso VN, Ruiz-de-Souza V, Gontijo CM. Digestion, Absorption and Tissue Distribution of Ovalbumin and Palmitoyl-ovalbumin: Impact on Immune Responses Triggered by Orally Administered Antigens. Scand J Immunol 2007; 65:139-47. [PMID: 17257218 DOI: 10.1111/j.1365-3083.2006.01884.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Previous work in this laboratory has demonstrated that ovalbumin coupled to palmitoyl residues (palmitoyl-Ova) does not induce oral tolerance. The present study sought to determine whether this coupling affects digestion, absorption and transfer of antigen. Ova and palmitoyl-Ova were shown to be digested differently in vitro by proteolytic enzymes and presented different tissue distribution kinetics after being labelled with (99m)technetium and orally administered to animals. Palmitoyl-Ova remained longer in the stomach, while native Ova was quickly transferred to the gut and other organs. After 3 h, higher levels of palmitoyl-Ova were found in the blood, Peyer's patches, mesenteric lymph nodes, liver and, especially, the spleen, which appears to be essential for immunization with palmitoyl-Ova. In fact, splenectomized mice treated orally with palmitoyl-Ova became tolerant, while tolerance to Ova was not affected. Thus, palmitoyl coupling was demonstrated to affect antigen digestion, absorption and transport. This is the first time that the spleen has been shown to be required for oral immunization with palmitoyl-Ova.
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Affiliation(s)
- F M Oliveira
- Department of Biochemistry and Immunology, Federal University of Minas Gerais, UFMG, Belo Horizonte, MG, Brazil.
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12
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Kipper MJ, Wilson JH, Wannemuehler MJ, Narasimhan B. Single dose vaccine based on biodegradable polyanhydride microspheres can modulate immune response mechanism. J Biomed Mater Res A 2006; 76:798-810. [PMID: 16345084 DOI: 10.1002/jbm.a.30545] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This study focuses on the development of single dose vaccines based on biodegradable polyanhydride microspheres that have the unique capability to modulate the immune response mechanism. The polymer system employed consists of copolymers of 1,6-bis(p-carboxyphenoxy)hexane and sebacic acid. Two copolymer formulations that have been shown to provide extended release kinetics and protein stability were investigated. Using tetanus toxoid (TT) as a model antigen, in vivo studies in C3H/HeOuJ mice demonstrated that the encapsulation procedure preserves the immunogenicity of the TT. The polymer itself exhibited an adjuvant effect, enhancing the immune response to a small dose of TT. The microspheres provided a prolonged exposure to TT sufficient to induce both a primary and a secondary immune response (i.e., high antibody titers) with high-avidity antibody production, without requiring an additional administration. Antigen-specific proliferation 28 weeks after a single immunization indicated that immunization with the polyanhydride microspheres generated long-lived memory cells and plasma cells (antibody-secreting B cells) that generally do not occur without maturation signals from T helper cells. Furthermore, by altering the vaccine formulation, the overall strength of the T helper type 2 immune response was selectively diminished, resulting in a balanced immune response, without reducing the overall titer. This result is striking, considering free TT induces a T helper type 2 immune response, and has important implications for developing vaccines to intracellular pathogens. The ability to selectively tune the immune response without the administration of additional cytokines or noxious adjuvants is a unique feature of this delivery vehicle that may make it an excellent candidate for vaccine development.
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Affiliation(s)
- Matt J Kipper
- Department of Chemical and Biological Engineering, Iowa State University, 2035 Sweeney Hall, Ames, 50011-2230, USA
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13
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Sinyakov MS, Dror M, Lublin-Tennenbaum T, Salzberg S, Margel S, Avtalion RR. Nano- and microparticles as adjuvants in vaccine design: success and failure is related to host natural antibodies. Vaccine 2006; 24:6534-41. [PMID: 16842893 DOI: 10.1016/j.vaccine.2006.06.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2006] [Revised: 05/30/2006] [Accepted: 06/14/2006] [Indexed: 10/24/2022]
Abstract
Bovine serum albumin (BSA) and the surface A-layer protein (AP) of an atypical strain of fish bacterial pathogen Aeromonas salmonicida were covalently linked with polymeric nano- and microparticles, and antigenicity of the resulted conjugates was compared in mice and goldfish. Distinct albeit different levels of natural BSA and AP antibodies were present in both animal species. Significant stimulation of the anti-AP antibody response in mice strikingly contrasted to unresponsiveness or even suppression in fish. The results negatively correlate with the levels of respective natural antibodies in the host and are discussed in context of problems related to fish vaccination. The work reinforces the instructive role of natural antibodies in adaptive immune response.
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14
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Nikou KN, Stivaktakis N, Avgoustakis K, Sotiropoulou PA, Perez SA, Baxevanis CN, Papamichail M, Leondiadis L. A HER-2/neu peptide admixed with PLA microspheres induces a Th1-biased immune response in mice. Biochim Biophys Acta Gen Subj 2005; 1725:182-9. [PMID: 16126344 DOI: 10.1016/j.bbagen.2005.07.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2005] [Revised: 07/13/2005] [Accepted: 07/14/2005] [Indexed: 12/12/2022]
Abstract
The elimination of cancer cells requires strong cellular immune responses, and these responses are induced by the activation of Th1 lymphocytes. In this work, the possibility of inducing a Th1 type of immune response in vivo by mixing a HER-2/neu synthetic CTL (cytotoxic T lymphocyte) peptide [HER-2/neu (789-797)], with poly-lactide (PLA) microspheres was investigated. Various formulations of the peptide were administered to HLA-A2.1 transgenic (HHD) mice. Cellular experiments, assessing proliferation and cytokine determination in splenocyte culture supernatants, were carried out in order to evaluate the type of immune response to the antigen. The in vivo administration of the peptide antigen admixed with the PLA microspheres induced a potent immune response which was comparable to that induced by the combination of the antigen in complete Freund's adjuvant (CFA). Furthermore, the cytokine profile produced by the T lymphocytes of the immunized animals indicated that the combination of the peptide antigen with the PLA microspheres induced a strong Th1 biased immune response to the antigen. The time of peptide incubation with the microspheres prior to administration did not affect the immune response, which further simplifies the preparation of this type of vaccine. The results justify further investigation of the possibility of inducing effective cellular immune responses against cancer cells overexpressing HER-2/neu molecules by simply mixing appropriate HER-2/neu peptide antigens with PLA microspheres.
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Affiliation(s)
- Konstantina N Nikou
- Mass Spectrometry and Dioxin Analysis Laboratory, IRRP, National Centre for Scientific Research "Demokritos", 15310 Athens, Greece
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15
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Regner M, Martinez X, Belnoue E, Sun CM, Boisgerault F, Lambert PH, Leclerc C, Siegrist CA. Partial activation of neonatal CD11c+ dendritic cells and induction of adult-like CD8+ cytotoxic T cell responses by synthetic microspheres. THE JOURNAL OF IMMUNOLOGY 2004; 173:2669-74. [PMID: 15294984 DOI: 10.4049/jimmunol.173.4.2669] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Neonatal cytotoxic T cell responses have only been elicited to date with immunogens or delivery systems inducing potent direct APC activation. To define the minimal activation requirements for the induction of neonatal CD8(+) cytotoxic responses, we used synthetic microspheres (MS) coated with a single CD8(+) T cell peptide from lymphocytic choriomeningitis virus (LCMV) or HIV-1. Unexpectedly, a single injection of peptide-conjugated MS without added adjuvant induced CD4-dependent Ag-specific neonatal murine cytotoxic responses with adult-like CTL precursor frequency, avidity for Ag, and frequency of IFN-gamma-secreting CD8(+) splenocytes. Neonatal CD8(+) T cell responses to MS-LCMV were elicited within 2 wk of a single immunization and, upon challenge, provided similar protection from viral replication as adult CTLs, demonstrating their in vivo competence. As previously reported, peptide-coated MS elicited no detectable activation of adult CD11c(+) dendritic cells (DC). In contrast, CTL responses were associated with a partial activation of neonatal CD11c(+) DC, reflected by the up-regulation of CD80 and CD86 expression but no concurrent changes in MHC class II or CD40 expression. However, this partial activation of neonatal DC was not sufficient to circumvent the requirement for CD4(+) T cell help. The effective induction of neonatal CD8(+) T cell responses by this minimal Ag delivery system demonstrates that neonatal CD11c(+) DC may mature sufficiently to stimulate naive CD8(+) neonatal T cells, even in the absence of strong maturation signals.
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Affiliation(s)
- Matthias Regner
- World Health Organization Collaborating Center for Neonatal Vaccinology, Department of Pathology, University of Geneva Medical School, Geneva, Switzerland
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16
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Gilliet M, Kleinhans M, Lantelme E, Schadendorf D, Burg G, Nestle FO. Intranodal injection of semimature monocyte-derived dendritic cells induces T helper type 1 responses to protein neoantigen. Blood 2003; 102:36-42. [PMID: 12560234 DOI: 10.1182/blood-2002-07-2274] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Dendritic cells (DCs) represent the most potent antigen-presenting cells of the immune system capable of initiating primary immune responses to neoantigens. Here we characterize the primary CD4 T-cell immune response to protein keyhole limpet hemocyanin (KLH) in 5 metastatic melanoma patients undergoing a tumor peptide-based dendritic cell vaccination trial. Monocyte-derived dendritic cells displaying a semimature phenotype, as defined by surface markers, were loaded ex vivo with antigen and injected intranodally at weekly intervals for 4 weeks. All patients developed a strong and long-lasting delayed-type hypersensitivity reactivity to KLH, which correlated with the induction of KLH-dependent proliferation of CD4 T cells in vitro. Secondary in vitro stimulation with KLH showed significant increase in interferon-gamma and interleukin-2 (IL-2) but not IL-4, IL-5, nor IL-10 secretion by bulk T cells. On the single-cell level, most TH1 cells among in vitro-generated KLH-specific T-cell lines confirmed the preferential induction of a KLH-specific type 1 T helper immune response. Furthermore, the induction of KLH-specific antibodies of the IgG2 subtype may reflect the induction of a type 1 cytokine profile in vivo after vaccination. Our results indicate that intranodal vaccination with semimature DCs can prime strong, long-lasting CD4 T-cell responses with a TH1-type cytokine profile in cancer patients.
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Affiliation(s)
- Michel Gilliet
- Department of Dermatology, University of Zürich, Gloriastrasse 31, 8091 Zürich, Switzerland
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17
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Grönlund H, Vrtala S, Wiedermann U, Dekan G, Kraft D, Valenta R, Van Hage-Hamsten M. Carbohydrate-based particles: a new adjuvant for allergen-specific immunotherapy. Immunology 2002; 107:523-9. [PMID: 12460198 PMCID: PMC1782826 DOI: 10.1046/j.1365-2567.2002.01535.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The occurrence of systemic anaphylactic side-effects in the course of allergen-specific immunotherapy has been strongly reduced by the adsorption of allergens to aluminium hydroxide, the most frequently used adjuvant in humans. Using the major timothy grass pollen allergen, Phl p 5b, in its recombinant form for immunization of mice, we demonstrate that carbohydrate-based particles (CBP) exhibit several potential advantages over aluminium-hydroxide as adjuvant for immunotherapy. Similar to alum-bound rPhl p 5b, CBP-bound rPhl p 5b induced a stronger antibody and cytokine response than unbound rPhl p 5b after subcutaneous injection in mice. The antibodies induced by CBP-bound rPhl p 5b, exhibited potentially beneficial activities as they cross-reacted with group 5 allergens from five other grass species and inhibited the binding of grass pollen allergic patients IgE to Phl p 5b. Alum-bound rPhl p 5b induced a preferential allergen-specific Th2-response characterized by high immunoglobulin G1 (IgG1) antibody levels and elevated interleukin (IL)-4 and IL-5 production in cultured splenocytes. By contrast, CBP-bound rPhl p 5b, but not rPhl p 5b alone or coadministered with CBP, induced a mixed allergen-specific T helper 1 (Th1)/Th2 immune response characterized by the additional production of allergen-specific IgG2a/b antibody responses and elevated interferon-gamma production. Conjugation of rPhl p 5b to CBP yielded a stable vaccine formulation with preserved immunogenic features of the allergen and, in contrast to alum, induced no granulomatous tissue reactions. Based on these results, CBP is suggested as a potentially useful adjuvant for specific immunotherapy of IgE-mediated allergies.
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Affiliation(s)
- Hans Grönlund
- Unit of Clinical Immunology and Allergy, Karolinska Institutet, Stockholm, Sweden.
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18
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Maletto B, Rópolo A, Morón V, Pistoresi‐Palencia MC. CpG‐DNA stimulates cellular and humoral immunity and promotes Th1 differentiation in aged BALB/c mice. J Leukoc Biol 2002. [DOI: 10.1189/jlb.72.3.447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Belkys Maletto
- Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
| | - Andrea Rópolo
- Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
| | - Victor Morón
- Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina
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19
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Lomer MCE, Thompson RPH, Powell JJ. Fine and ultrafine particles of the diet: influence on the mucosal immune response and association with Crohn's disease. Proc Nutr Soc 2002; 61:123-30. [PMID: 12002786 DOI: 10.1079/pns2001134] [Citation(s) in RCA: 285] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Crohn's disease is a modern Western disease characterised by transmural inflammation of the gastrointestinal tract. It is of unknown aetiology, but evidence suggests that it results from a combination of genetic predisposition and environmental factors. Bacterial-sized microparticles (0.1-1.0 microm) are potent adjuvants in model antigen-mediated immune responses and are increasingly associated with disease. Microparticles of TiO2 and aluminosilicate accumulate in macrophages of human gut-associated lymphoid tissue where the earliest signs of lesions in Crohn's disease are observed. Dietary microparticles are of endogenous or exogenous origin. Endogenous microparticles dominate and are calcium phosphate (most probably hydroxyapatite), which precipitates in the lumen of the mid-distal gastrointestinal tract due to secretion of Ca and phosphate in the succus entericus. Exogenous dietary microparticles are contaminants (soil and/or dust) and food additives. TiO2, for example, is a food colourant, and aluminosilicates are anti-caking agents, although some aluminosilicates occur as natural contaminants. Food additives alone account for ingestion of approximately 10(12) particles/person per d. Possible mechanisms for the role of exogenous and endogenous dietary microparticles in promoting toleragenic or immune responses of gastrointestinal mucosal phagocytosis are discussed. In a double-blind randomised pilot study we have shown that a diet low in Ca and exogenous microparticles appears to alleviate the symptoms of ileal Crohn's disease, with a significant (P= 0.002) improvement in the Crohn's disease activity index. A multi-centre trial and further mechanistic studies at the cellular level are underway.
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Affiliation(s)
- Miranda C E Lomer
- Gastrointestinal Laboratory, The Rayne Institute, St Thomas' Hospital, London, UK.
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20
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Gounni AS, Spanel-Borowski K, Palacios M, Heusser C, Moncada S, Lobos E. Pulmonary Inflammation Induced by a Recombinant Brugia malayi γ-glutamyl transpeptidase Homolog: Involvement of Humoral Autoimmune Responses. Mol Med 2001. [DOI: 10.1007/bf03402217] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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21
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Mejri N, Franscini N, Rutti B, Brossard M. Th2 polarization of the immune response of BALB/c mice to Ixodes ricinus instars, importance of several antigens in activation of specific Th2 subpopulations. Parasite Immunol 2001; 23:61-9. [PMID: 11240897 DOI: 10.1046/j.1365-3024.2001.00356.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BALB/c mice were infested with Ixodes ricinus larvae, nymphs or adults. Expression of IL-4 and IFN-gamma mRNA in axillary and brachial draining lymph node cells were measured by competitive quantitative reverse transcription-polymerase chain reaction 9 days after the beginning of primary-infestation. IL-4 mRNA was always higher than that of IFN-gamma mRNA for all tick instars. Moreover, IL-4 mRNA expression progressively increased during nymphal primary-infestation with a high burst of expression 7 days after the beginning of infestation. No evolution of IFN-gamma mRNA expression was detected. Draining lymph node cells of infested BALB/c produced higher level of IL-4 than IFN-gamma following in vitro restimulation with adult tick saliva, salivary gland extract (SGE) or with five selected different chromatographic fractions of SGE. Anti-tick IgG1 antibodies but no IgG2a were detected in BALB/c pluri-infested with I. ricinus nymphs, which confirmed the Th2 polarization of the immune response.
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Affiliation(s)
- N Mejri
- Institute of Zoology, Neuchâtel, Switzerland
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22
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Sedlik C, Dadaglio G, Saron MF, Deriaud E, Rojas M, Casal SI, Leclerc C. In vivo induction of a high-avidity, high-frequency cytotoxic T-lymphocyte response is associated with antiviral protective immunity. J Virol 2000; 74:5769-75. [PMID: 10846055 PMCID: PMC112070 DOI: 10.1128/jvi.74.13.5769-5775.2000] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Many approaches are currently being developed to deliver exogenous antigen into the major histocompatibility complex class I-restricted antigen pathway, leading to in vivo priming of CD8(+) cytotoxic T cells. One attractive possibility consists of targeting the antigen to phagocytic or macropinocytic antigen-presenting cells. In this study, we demonstrate that strong CD8(+) class I-restricted cytotoxic responses are induced upon intraperitoneal immunization of mice with different peptides, characterized as CD8(+) T-cell epitopes, bound to 1-microm synthetic latex microspheres and injected in the absence of adjuvant. The cytotoxic response induced against a lymphocytic choriomeningitis virus (LCMV) peptide linked to these microspheres was compared to the cytotoxic T-lymphocyte (CTL) response obtained upon immunization with the nonreplicative porcine parvovirus-like particles (PPV:VLP) carrying the same peptide (PPV:VLP-LCMV) previously described (C. Sedlik, M. F. Saron, J. Sarraseca, I. Casal, and C. Leclerc, Proc. Natl. Acad. Sci. USA 94:7503-7508, 1997). We show that the induction of specific CTL activity by peptides bound to microspheres requires CD4(+) T-cell help in contrast to the CTL response obtained with the peptide delivered by viral pseudoparticles. Furthermore, PPV:VLP are 100-fold more efficient than microspheres in generating a strong CTL response characterized by a high frequency of specific T cells of high avidity. Moreover, PPV:VLP-LCMV are able to protect mice against a lethal LCMV challenge whereas microspheres carrying the LCMV epitope fail to confer such protection. This study demonstrates the crucial involvement of the frequency and avidity of CTLs in conferring antiviral protective immunity and highlights the importance of considering these parameters when developing new vaccine strategies.
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Affiliation(s)
- C Sedlik
- Unité de Biologie des Régulations Immunitaires, 75724 Paris Cedex 15, France, and Ingenasa, 28037 Madrid, Spain
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23
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Dadaglio G, Moukrim Z, Lo-Man R, Sheshko V, Sebo P, Leclerc C. Induction of a polarized Th1 response by insertion of multiple copies of a viral T-cell epitope into adenylate cyclase of Bordetella pertussis. Infect Immun 2000; 68:3867-72. [PMID: 10858196 PMCID: PMC101660 DOI: 10.1128/iai.68.7.3867-3872.2000] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The adenylate cyclase (CyaA) of Bordetella pertussis delivers the N-terminal catalytic domain into the cytosol of a large number of eukaryotic cells, in particular, professional antigen-presenting cells. This allows the delivery of CD8(+) T-cell epitopes to the major histocompatibility complex class I presentation pathway. We have previously shown that immunization of mice with CyaA carrying a single CD8(+) T-cell epitope leads to antiviral protection as well as to protective and therapeutic antitumor immunity associated with the induction of specific cytotoxic T-lymphocyte (CTL) responses. Here, we evaluated the capacity of CyaA carrying one to four copies of the CD8(+) CD4(+) T-cell epitope from the nucleoprotein of the lymphocytic choriomeningitis virus to induce T-cell responses. Both CTL and Th1-like specific responses were detected in mice immunized with recombinant CyaA with or without adjuvant. Although the insertion of the larger peptides resulted in partial loss of the invasive capacity of recombinant CyaA, insertion of several copies of the same epitope led to a strong enhancement of Th1 responses and, to a lesser degree, CTL responses. These results underscore the potency of CyaA for vaccine design with a new impact on diseases in which the Th1 response has been described to have a beneficial effect.
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Affiliation(s)
- G Dadaglio
- Unité de Biologie des Régulations Immunitaires, Institut Pasteur, Paris, France.
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24
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Lo-Man R, Langeveld JP, Dériaud E, Jehanno M, Rojas M, Clément JM, Meloen RH, Hofnung M, Leclerc C. Extending the CD4(+) T-cell epitope specificity of the Th1 immune response to an antigen using a Salmonella enterica serovar typhimurium delivery vehicle. Infect Immun 2000; 68:3079-89. [PMID: 10816447 PMCID: PMC97535 DOI: 10.1128/iai.68.6.3079-3089.2000] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We analyzed the CD4 T-cell immunodominance of the response to a model antigen (Ag), MalE, when delivered by an attenuated strain of Salmonella enterica serovar Typhimurium (SL3261*pMalE). Compared to purified MalE Ag administered with adjuvant, the mapping of the peptide-specific proliferative responses showed qualitative differences when we used the Salmonella vehicle. We observed the disappearance of one out of eight MalE peptides' T-cell reactivity upon SL3261*pMalE immunization, but this phenomenon was probably due to a low level of T-cell priming, since it could be overcome by further immunization. The most striking effect of SL3261*pMalE administration was the activation and stimulation of new MalE peptide-specific T-cell responses that were silent after administration of purified Ag with adjuvant. Ag presentation assays performed with MalE-specific T-cell hybridomas showed that infection of Ag-presenting cells by this intracellular attenuated bacterium did not affect the processing and presentation of the different MalE peptides by major histocompatibility complex (MHC) class II molecules and therefore did not account for immunodominance modulation. Thus, immunodominance of the T-cell response to microorganisms is governed not only by the frequency of the available T-cell repertoire or the processing steps in Ag-presenting cells that lead to MHC presentation but also by other parameters probably related to the infectious process and to the bacterial products. Our results indicate that, upon infection by a microorganism, the specificity of the T-cell response induced against its Ags can be much more effective than with purified Ags and that it cannot completely be mimicked by purified Ags administered with adjuvant.
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Affiliation(s)
- R Lo-Man
- Unité de Biologie des Régulations Immunitaires, Institut Pasteur, Paris, France.
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25
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Newman KD, Sosnowski DL, Kwon GS, Samuel J. Delivery of MUC1 mucin peptide by Poly(d,l-lactic-co-glycolic acid) microspheres induces type 1 T helper immune responses. J Pharm Sci 1998; 87:1421-7. [PMID: 9811500 DOI: 10.1021/js980070s] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthetic peptides corresponding to the variable tandem repeat domain of the cancer-associated antigen MUC1 mucin are candidates for cancer vaccines. In our investigation mice were immunized via subcutaneous injection with poly(d,l-lactic-co-glycolic acid) (PLGA) microspheres containing a MUC1 mucin peptide. It was hypothesized that microencapsulation of the MUC1 mucin peptide would prime for antigen-specific Th1 responses while avoiding the need for traditional adjuvants and carrier proteins. Furthermore, an immunomodulator, monophosphoryl lipid A (MPLA), was incorporated into the peptide-loaded PLGA microspheres based on its ability to enhance Th1 responses. The results revealed T cell specific immune responses. The cytokine secretion profiles of the T cells consisted of high levels of interferon-gamma with undetectable levels of interleukin-4 and interleukin-10. Moreover, incorporation of MPLA in the MUC1 peptide-loaded PLGA microspheres resulted in an increase in interferon-gamma production. The antibody response was negative for IgM and IgG in the absence of MPLA; however, in the presence of MPLA antibody production was negative for IgM with a minimal IgG response consisting of IgG2a, IgG2b, and IgG3. Based on the antibody and cytokine profiles, it was concluded that MUC1 mucin peptide-loaded PLGA microspheres are capable of eliciting specific Th1 responses, which may be enhanced through the use of MPLA.
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Affiliation(s)
- K D Newman
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton Alberta, Canada
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26
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Lo-Man R, Rueda P, Sedlik C, Deriaud E, Casal I, Leclerc C. A recombinant virus-like particle system derived from parvovirus as an efficient antigen carrier to elicit a polarized Th1 immune response without adjuvant. Eur J Immunol 1998; 28:1401-7. [PMID: 9565380 DOI: 10.1002/(sici)1521-4141(199804)28:04<1401::aid-immu1401>3.0.co;2-m] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Hybrid virus-like particles (VLP) were prepared by self-assembly of the modified porcine parvovirus (PPV) VP2 capsid protein carrying a CD8+ or CD4+ T cell epitope. Immunization of mice with a single dose of these hybrid pseudo-particles, without adjuvant, induced strong cytotoxic T lymphocyte and T helper (Th) responses against the reporter epitope. The Th response was characterized by a Th1 phenotype. We also analyzed in vitro the uptake mechanism of these parvovirus-like particles and the processing requirements associated with presentation by MHC molecules. Although previously shown to be presented by MHC class I molecules, these particles also enter very efficiently the MHC class II endocytic pathway, and behave as conventional exogenous antigens. Indeed, the processing of chimeric PPV:VLP was performed in endosomal/lysosomal acidic vesicles and the presentation of the foreign epitope carried by these particles was sensitive to brefeldin A and cycloheximide, showing that the foreign peptide was loaded on nascent MHC class II molecules. These results give some indication of how PPV:VLP can be presented by MHC class I and class II molecules, and underscore the wide potency of such VLP system to deliver foreign antigens for vaccine design.
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Affiliation(s)
- R Lo-Man
- Unité de Biologie des Régulations Immunitaires, Institut Pasteur, Paris, France.
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