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Frank I, Li SS, Grunenberg N, Overton ET, Robinson ST, Zheng H, Seaton KE, Heptinstall JR, Allen MA, Mayer KH, Culver DA, Keefer MC, Edupuganti S, Pensiero MN, Mehra VL, De Rosa SC, Morris DE, Wang S, Seaman MS, Montefiori DC, Ferrari G, Tomaras GD, Kublin JG, Corey L, Lu S. Safety and immunogenicity of a polyvalent DNA-protein HIV vaccine with matched Env immunogens delivered as a prime-boost regimen or coadministered in HIV-uninfected adults in the USA (HVTN 124): a phase 1, placebo-controlled, double-blind randomised controlled trial. Lancet HIV 2024; 11:e285-e299. [PMID: 38692824 PMCID: PMC11228966 DOI: 10.1016/s2352-3018(24)00036-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 01/23/2024] [Accepted: 02/12/2024] [Indexed: 05/03/2024]
Abstract
BACKGROUND An effective HIV vaccine will most likely need to have potent immunogenicity and broad cross-subtype coverage. The aim of the HIV Vaccine Trials Network (HVTN) 124 was to evaluate safety and immunogenicity of a unique polyvalent DNA-protein HIV vaccine with matching envelope (Env) immunogens. METHODS HVTN 124 was a randomised, phase 1, placebo-controlled, double-blind study, including participants who were HIV seronegative and aged 18-50 years at low risk for infection. The DNA vaccine comprised five plasmids: four copies expressing Env gp120 (clades A, B, C, and AE) and one gag p55 (clade C). The protein vaccine included four DNA vaccine-matched GLA-SE-adjuvanted recombinant gp120 proteins. Participants were enrolled across six clinical sites in the USA and were randomly assigned to placebo or one of two vaccine groups (ie, prime-boost or coadministration) in a 5:1 ratio in part A and a 7:1 ratio in part B. Vaccines were delivered via intramuscular needle injection. The primary outcomes were safety and tolerability, assessed via frequency, severity, and attributability of local and systemic reactogenicity and adverse events, laboratory safety measures, and early discontinuations. Part A evaluated safety. Part B evaluated safety and immunogenicity of two regimens: DNA prime (administered at months 0, 1, and 3) with protein boost (months 6 and 8), and DNA-protein coadministration (months 0, 1, 3, 6, and 8). All randomly assigned participants who received at least one dose were included in the safety analysis. The study is registered with ClinicalTrials.gov (NCT03409276) and is closed to new participants. FINDINGS Between April 19, 2018 and Feb 13, 2019, 60 participants (12 in part A [five men and seven women] and 48 in part B [21 men and 27 women]) were enrolled. All 60 participants received at least one dose, and 14 did not complete follow-up (six of 21 in the prime-boost group and eight of 21 in the coadminstration group). 11 clinical adverse events deemed by investigators as study-related occurred in seven of 48 participants in part B (eight of 21 in the prime-boost group and three of 21 in the coadministration group). Local reactogenicity in the vaccine groups was common, but the frequency and severity of reactogenicity signs or symptoms did not differ between the prime-boost and coadministration groups (eg, 20 [95%] of 21 in the prime-boost group vs 21 [100%] of 21 in the coadministration group had either local pain or tenderness of any severity [p=1·00], and seven [33%] vs nine [43%] had either erythema or induration [p=0·97]), nor did laboratory safety measures. There were no delayed-type hypersensitivity reactions or vasculitis or any severe clinical adverse events related to vaccination. The most frequently reported systemic reactogenicity symptoms in the active vaccine groups were malaise or fatigue (five [50%] of ten in part A and 17 [81%] of 21 in the prime-boost group vs 15 [71%] of 21 in the coadministration group in part B), headache (five [50%] and 18 [86%] vs 12 [57%]), and myalgia (four [40%] and 13 [62%] vs ten [48%]), mostly of mild or moderate severity. INTERPRETATION Both vaccine regimens were safe, warranting evaluation in larger trials. FUNDING US National Institutes of Health and US National Institute of Allergy and Infectious Diseases.
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Affiliation(s)
- Ian Frank
- Division of Infectious Disease, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Shuying S Li
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Nicole Grunenberg
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Edgar T Overton
- Division of Infectious Diseases, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Samuel T Robinson
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Hua Zheng
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA; Icon, Burlington, QC, Canada
| | - Kelly E Seaton
- Department of Surgery, Duke University, Durham, NC, USA; Department of Immunology, Duke University, Durham, NC, USA; Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Duke University, Durham, NC, USA; Center for Human Systems Immunology, Duke University, Durham, NC, USA
| | - Jack R Heptinstall
- Department of Surgery, Duke University, Durham, NC, USA; Department of Immunology, Duke University, Durham, NC, USA; Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Duke University, Durham, NC, USA; Center for Human Systems Immunology, Duke University, Durham, NC, USA
| | - Mary A Allen
- Vaccine Research Program, Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Kenneth H Mayer
- Division of Infectious Diseases, Beth Israel Deaconess Medical Center, Boston, MA, USA; The Fenway Institute, Fenway Health, Boston, MA, USA
| | - Daniel A Culver
- Department of Pulmonary and Critical Care Medicine, Integrated Hospital Care Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Pathobiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Michael C Keefer
- Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Sri Edupuganti
- Hope Clinic of the Emory Vaccine Center, Division of Infectious Diseases, Department of Medicine, School of Medicine, Emory University, Decatur, GA, USA
| | - Michael N Pensiero
- Vaccine Research Program, Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Vijay L Mehra
- Vaccine Research Program, Division of AIDS, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Stephen C De Rosa
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Daryl E Morris
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Shixia Wang
- Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Michael S Seaman
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - David C Montefiori
- Department of Surgery, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Duke University, Durham, NC, USA
| | - Guido Ferrari
- Department of Surgery, Duke University, Durham, NC, USA; Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Duke University, Durham, NC, USA; Center for Human Systems Immunology, Duke University, Durham, NC, USA
| | - Georgia D Tomaras
- Department of Surgery, Duke University, Durham, NC, USA; Department of Immunology, Duke University, Durham, NC, USA; Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA; Duke Human Vaccine Institute, Duke University, Durham, NC, USA; Center for Human Systems Immunology, Duke University, Durham, NC, USA
| | - James G Kublin
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Lawrence Corey
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Shan Lu
- Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA.
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Chung C, Kudchodkar SB, Chung CN, Park YK, Xu Z, Pardi N, Abdel-Mohsen M, Muthumani K. Expanding the Reach of Monoclonal Antibodies: A Review of Synthetic Nucleic Acid Delivery in Immunotherapy. Antibodies (Basel) 2023; 12:46. [PMID: 37489368 PMCID: PMC10366852 DOI: 10.3390/antib12030046] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/26/2023] Open
Abstract
Harnessing the immune system to combat disease has revolutionized medical treatment. Monoclonal antibodies (mAbs), in particular, have emerged as important immunotherapeutic agents with clinical relevance in treating a wide range of diseases, including allergies, autoimmune diseases, neurodegenerative disorders, cancer, and infectious diseases. These mAbs are developed from naturally occurring antibodies and target specific epitopes of single molecules, minimizing off-target effects. Antibodies can also be designed to target particular pathogens or modulate immune function by activating or suppressing certain pathways. Despite their benefit for patients, the production and administration of monoclonal antibody therapeutics are laborious, costly, and time-consuming. Administration often requires inpatient stays and repeated dosing to maintain therapeutic levels, limiting their use in underserved populations and developing countries. Researchers are developing alternate methods to deliver monoclonal antibodies, including synthetic nucleic acid-based delivery, to overcome these limitations. These methods allow for in vivo production of monoclonal antibodies, which would significantly reduce costs and simplify administration logistics. This review explores new methods for monoclonal antibody delivery, including synthetic nucleic acids, and their potential to increase the accessibility and utility of life-saving treatments for several diseases.
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Affiliation(s)
| | | | - Curtis N Chung
- GeneOne Life Science, Inc., Seoul 04500, Republic of Korea
| | - Young K Park
- GeneOne Life Science, Inc., Seoul 04500, Republic of Korea
| | - Ziyang Xu
- Massachusetts General Hospital, Harvard University, Boston, MA 02114, USA
| | - Norbert Pardi
- Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | | | - Kar Muthumani
- GeneOne Life Science, Inc., Seoul 04500, Republic of Korea
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Pushparajah D, Jimenez S, Wong S, Alattas H, Nafissi N, Slavcev RA. Advances in gene-based vaccine platforms to address the COVID-19 pandemic. Adv Drug Deliv Rev 2021; 170:113-141. [PMID: 33422546 PMCID: PMC7789827 DOI: 10.1016/j.addr.2021.01.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/23/2020] [Accepted: 01/01/2021] [Indexed: 01/07/2023]
Abstract
The novel betacoronavirus, SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), has spread across the globe at an unprecedented rate since its first emergence in Wuhan City, China in December 2019. Scientific communities around the world have been rigorously working to develop a potent vaccine to combat COVID-19 (coronavirus disease 2019), employing conventional and novel vaccine strategies. Gene-based vaccine platforms based on viral vectors, DNA, and RNA, have shown promising results encompassing both humoral and cell-mediated immune responses in previous studies, supporting their implementation for COVID-19 vaccine development. In fact, the U.S. Food and Drug Administration (FDA) recently authorized the emergency use of two RNA-based COVID-19 vaccines. We review current gene-based vaccine candidates proceeding through clinical trials, including their antigenic targets, delivery vehicles, and route of administration. Important features of previous gene-based vaccine developments against other infectious diseases are discussed in guiding the design and development of effective vaccines against COVID-19 and future derivatives.
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Affiliation(s)
- Deborah Pushparajah
- School of Pharmacy, University of Waterloo, 10A Victoria St S, Kitchener N2G 1C5, Canada
| | - Salma Jimenez
- School of Pharmacy, University of Waterloo, 10A Victoria St S, Kitchener N2G 1C5, Canada; Theraphage, 151 Charles St W Suite # 199, Kitchener, ON, N2G 1H6, Canada
| | - Shirley Wong
- School of Pharmacy, University of Waterloo, 10A Victoria St S, Kitchener N2G 1C5, Canada
| | - Hibah Alattas
- School of Pharmacy, University of Waterloo, 10A Victoria St S, Kitchener N2G 1C5, Canada
| | - Nafiseh Nafissi
- Mediphage Bioceuticals, 661 University Avenue, Suite 1300, Toronto, ON, M5G 0B7, Canada
| | - Roderick A Slavcev
- School of Pharmacy, University of Waterloo, 10A Victoria St S, Kitchener N2G 1C5, Canada; Mediphage Bioceuticals, 661 University Avenue, Suite 1300, Toronto, ON, M5G 0B7, Canada; Theraphage, 151 Charles St W Suite # 199, Kitchener, ON, N2G 1H6, Canada.
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4
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RETRACTED ARTICLE: Recent developments in DNA vaccination approaches against poultry coccidiosis and its future endeavours. WORLD POULTRY SCI J 2019. [DOI: 10.1017/s0043933914000336] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Jiang J, Ramos SJ, Bangalore P, Fisher P, Germar K, Lee BK, Williamson D, Kemme A, Schade E, McCoy J, Muthumani K, Weiner DB, Humeau LM, Broderick KE. Integration of needle-free jet injection with advanced electroporation delivery enhances the magnitude, kinetics, and persistence of engineered DNA vaccine induced immune responses. Vaccine 2019; 37:3832-3839. [DOI: 10.1016/j.vaccine.2019.05.054] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 05/14/2019] [Accepted: 05/18/2019] [Indexed: 01/08/2023]
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6
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Koday MT, Leonard JA, Munson P, Forero A, Koday M, Bratt DL, Fuller JT, Murnane R, Qin S, Reinhart TA, Duus K, Messaoudi I, Hartman AL, Stefano-Cole K, Morrison J, Katze MG, Fuller DH. Multigenic DNA vaccine induces protective cross-reactive T cell responses against heterologous influenza virus in nonhuman primates. PLoS One 2017; 12:e0189780. [PMID: 29267331 PMCID: PMC5739435 DOI: 10.1371/journal.pone.0189780] [Citation(s) in RCA: 22] [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: 02/06/2017] [Accepted: 12/01/2017] [Indexed: 01/19/2023] Open
Abstract
Recent avian and swine-origin influenza virus outbreaks illustrate the ongoing threat of influenza pandemics. We investigated immunogenicity and protective efficacy of a multi-antigen (MA) universal influenza DNA vaccine consisting of HA, M2, and NP antigens in cynomolgus macaques. Following challenge with a heterologous pandemic H1N1 strain, vaccinated animals exhibited significantly lower viral loads and more rapid viral clearance when compared to unvaccinated controls. The MA DNA vaccine induced robust serum and mucosal antibody responses but these high antibody titers were not broadly neutralizing. In contrast, the vaccine induced broadly-reactive NP specific T cell responses that cross-reacted with the challenge virus and inversely correlated with lower viral loads and inflammation. These results demonstrate that a MA DNA vaccine that induces strong cross-reactive T cell responses can, independent of neutralizing antibody, mediate significant cross-protection in a nonhuman primate model and further supports development as an effective approach to induce broad protection against circulating and emerging influenza strains.
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Affiliation(s)
- Merika T. Koday
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
| | - Jolie A. Leonard
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
| | - Paul Munson
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
| | - Adriana Forero
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
| | - Michael Koday
- Washington National Primate Research Center, University of Washington, Seattle, WA, United States of America
| | - Debra L. Bratt
- Washington National Primate Research Center, University of Washington, Seattle, WA, United States of America
| | - James T. Fuller
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
| | - Robert Murnane
- Washington National Primate Research Center, University of Washington, Seattle, WA, United States of America
| | - Shulin Qin
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Todd A. Reinhart
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Karen Duus
- Center for Immunology and Microbial Disease, Albany Medical College, Albany, NY, United States of America
- Basic Sciences Department, College of Osteopathic Medicine, Touro University Nevada, Henderson, NV, United States of America
| | - Ilhem Messaoudi
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Beaverton, OR, United States of America
| | - Amy L. Hartman
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Kelly Stefano-Cole
- Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, United States of America
| | - Juliet Morrison
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
| | - Michael G. Katze
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
- Washington National Primate Research Center, University of Washington, Seattle, WA, United States of America
| | - Deborah Heydenburg Fuller
- Department of Microbiology, University of Washington, Seattle, WA, United States of America
- Washington National Primate Research Center, University of Washington, Seattle, WA, United States of America
- * E-mail:
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7
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Adipose tissue: a new target for electroporation-enhanced DNA vaccines. Gene Ther 2017; 24:757-767. [PMID: 29106403 PMCID: PMC5746593 DOI: 10.1038/gt.2017.96] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/29/2017] [Accepted: 10/11/2017] [Indexed: 12/20/2022]
Abstract
DNA vaccines delivered using electroporation (EP) have had clinical success, but these EP methods generally utilize invasive needle electrodes. Here, we demonstrate the delivery and immunogenicity of a DNA vaccine into subcutaneous adipose tissue cells using noninvasive EP. Using finite element analysis, we predicted that plate electrodes, when oriented properly, could effectively concentrate the electric field within adipose tissue. In practice, these electrodes generated widespread gene expression persisting for at least 60 days in vivo within interscapular subcutaneous fat pads of guinea pigs. We then applied this adipose-EP protocol to deliver a DNA vaccine coding for an influenza antigen into guinea pigs. The resulting host immune responses elicited were of a similar magnitude to those achieved by skin delivery with EP. The onset of the humoral immune response was more rapid when the DNA dose was spread over multiple injection sites, and increasing the voltage of the EP device increased the magnitude of the immune response. This study supports further development of EP protocols delivering gene-based therapies to subcutaneous fat.
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Kulkarni S, Mukherjee S, Das KMP, Prabhudesai K, Deshpande N, Karnik S, Chowdhary AS, Padmanabhan U. Expression of domain III of the envelope protein from GP-78: a Japanese encephalitis virus. Virusdisease 2017; 28:209-212. [PMID: 28770248 DOI: 10.1007/s13337-017-0379-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 04/20/2017] [Indexed: 12/22/2022] Open
Abstract
Acute encephalitis caused by the Japanese encephalitis virus (JEV) represents a growing epidemic and is a cause for concern in Southeast Asia. JEV is transmitted to humans through the bite of the Culicine mosquito species. The virus genome comprising of an RNA strand also encodes the envelope protein (E) which surrounds the virus. The E protein aids in fusion of virus with the cellular membrane of the host cell with the help of three structurally distinct domains (DI, DII, DIII) that are connected by flexible hinge regions. Of these domains, DIII (JEV-DIII) has been reported to interact with the cellular membrane, aid viral entry and viral replication. Hence JEV-DIII has the potential to be an antigen that can provide immune protection to a JEV infection. In this study, we describe the cloning and expression of DIII of GP-78, a virulent strain of JEV prevalent in India. Our data clearly shows that JEV-DIII expressed from pVAC1 in HEK293T cells is membrane targeted. To our knowledge, this is the first demonstration of a recombinant construct that may block JEV entry into the cells and/or evoke specific antibodies against JEV. Future studies will reveal if our construct will elicit significant immune responses which will alleviate or ameliorate the pro-inflammatory responses induced by JEV.
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Affiliation(s)
- Sahil Kulkarni
- Department of Zoonosis, Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai, 400 012 India
| | - Sandeepan Mukherjee
- Department of Virology, Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai, 400 012 India
| | | | - Kaushiki Prabhudesai
- Department of Zoonosis, Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai, 400 012 India
| | - Nupur Deshpande
- Department of Zoonosis, Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai, 400 012 India
| | - Sushant Karnik
- Department of Zoonosis, Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai, 400 012 India
| | - Abhay S Chowdhary
- Department of Virology, Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai, 400 012 India
| | - Usha Padmanabhan
- Department of Cell Biology, Haffkine Institute for Training, Research and Testing, Acharya Donde Marg, Parel, Mumbai, 400 012 India
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10
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Chang DZ, Lomazow W, Joy Somberg C, Stan R, Perales MA. Granulocyte-Macrophage Colony Stimulating Factor: An Adjuvant for Cancer Vaccines. Hematology 2013; 9:207-15. [PMID: 15204102 DOI: 10.1080/10245330410001701549] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Granulocyte-macrophage colony stimulating factor (GM-CSF) enhances immune responses by inducing the proliferation, maturation, and migration of dendritic cells, and the expansion and differentiation of B and T lymphocytes. There is significant data in pre-clinical animal models demonstrating the adjuvant effects of GM-CSF in a variety of cancer vaccine approaches, including cellular vaccines, viral vaccines, peptide and protein vaccines, and DNA vaccines. GM-CSF is an attractive vaccine adjuvant because of its immune modulation effects and low toxicity profile. The results in animal models have been confirmed in pilot clinical trials and several clinical trials are currently ongoing.
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Affiliation(s)
- David Z Chang
- Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
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11
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Abstract
The use of gene constructs for DNA immunization offers several potential advantages over other commonly used vaccine approaches: (1) full-length cDNA provides multiple potential class I and class II epitopes, thus bypassing limitations of MHC restriction; (2) bacterial plasmid DNA contains immunogenic unmethylated CpG motifs (immunostimulatory sequences) that may act as a potent immunological adjuvant; and (3) DNA is relatively simple to purify in large quantities. The cDNA encoding the antigen of interest is cloned into a bacterial expression plasmid with a constitutively active promoter and this plasmid is injected into the skin or muscle where it is taken up by professional antigen-presenting cells, particularly dendritic cells, either through direct transfection or cross-priming. One can further enhance or modulate the immune response through co-delivery of DNA encoding cytokines or chemokines, including cytokine-Fc fusion molecules. The latter use molecular techniques to fuse a cytokine to the Fc portion of IgG1, creating a chimeric molecule with functional activity. In the present chapter, we will outline the approach to develop cytokine-Fc fusion genes as molecular adjuvants and will use GM-CSF as an example.
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12
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Medley CD, Muralidhara BK, Chico S, Durban S, Mehelic P, Demarest C. Quantitation of plasmid DNA deposited on gold particles for particle-mediated epidermal delivery using ICP-MS. Anal Bioanal Chem 2010; 398:527-35. [PMID: 20582693 DOI: 10.1007/s00216-010-3925-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Revised: 06/07/2010] [Accepted: 06/14/2010] [Indexed: 11/24/2022]
Abstract
DNA-plasmid-based vaccines are a promising class of next generation therapeutics. Particle-mediated epidermal delivery is an attractive method for the administration of DNA plasmid vaccines. This technology utilizes minute quantities of DNA plasmid which have been deposited onto the surface of 2-3-microm gold particles, and so the development of this technology requires the use of analytical methods that can accurately quantitate the amount of the DNA on the particle. Spectroscopic methods are generally insufficient for this task due to interference from the gold particle. ICP-MS circumvents this issue while allowing for the sensitive, reproducible, and accurate determination of the quantity of DNA on the particle surface. This report will detail the development and application of such a method.
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Affiliation(s)
- Colin D Medley
- Analytical Research and Development-Global Biologics, Pfizer Inc, St. Louis, MO 63017, USA.
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Ilias Basha H, Tiriveedhi V, Fleming TP, Gillanders WE, Mohanakumar T. Identification of immunodominant HLA-B7-restricted CD8+ cytotoxic T cell epitopes derived from mammaglobin-A expressed on human breast cancers. Breast Cancer Res Treat 2010; 127:81-9. [PMID: 20544273 DOI: 10.1007/s10549-010-0975-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Accepted: 05/29/2010] [Indexed: 01/07/2023]
Abstract
Mammaglobin-A (MGBA), a 10-kD protein, is over expressed in 80% of primary and metastatic human breast cancers. Breast cancer patients demonstrate high frequencies of CD8(+) cytotoxic T lymphocytes (CTL) specific to MGBA. Defining CD8(+) CTL responses to HLA class I-restricted MGBA-derived epitopes assumes significance in the context of our ongoing efforts to clinically translate vaccine strategies targeting MGBA for prevention and/or treatment of human breast cancers. In this study, we define the CD8(+) CTL response to MGBA-derived candidate epitopes presented in the context of HLA-B7, which has a frequency of 17.7% in Caucasian and 15.5% in African American populations. We identified seven MGBA-derived candidate epitopes with high predicted binding scores for HLA-B7 using a computer algorithm. Membrane stabilization studies with TAP-deficient T2 cells transfected with HLA-B7 indicated that MGBA B7.3 (VSKTEYKEL), B7.6 (KLLMVLMLA), B7.7 (NPQVSKTEY), and B7.1 (YAGSGCPLL) have the highest HLA-B7 binding affinities. Further, two CD8(+) CTL cell lines generated in vitro against T2.B7 cells individually loaded with MGBA-derived candidate epitopes showed significant cytotoxic activity against MGBA B7.1, B7.3, B7.6, and B7.7. In addition, the same CD8(+) CTL lines lysed the HLA-B7(+)/MGBA(+) human breast cancer cell line DU-4475 but had no significant cytotoxicity against HLA-B7(-) or MGBA(-) breast cancer cell lines. Cold-target inhibition studies strongly suggest that MGBA B7.3 is an immunodominant epitope. In summary, our results define HLA-B7-restriced, MGBA-derived, CD8(+) CTL epitopes with all of the necessary features for developing novel vaccine strategies against HLA-B7 expressing breast cancer patients.
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Affiliation(s)
- Haseeb Ilias Basha
- Department of Surgery, Washington University School of Medicine, Box 8109, 3328 CSRB, 660 South Euclid Avenue, Saint Louis, MO 63110, USA
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Vaine M, Lu S, Wang S. Progress on the induction of neutralizing antibodies against HIV type 1 (HIV-1). BioDrugs 2009; 23:137-53. [PMID: 19627166 DOI: 10.2165/00063030-200923030-00001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Infection with HIV type 1 (HIV-1), the causative agent of AIDS, is one of the most catastrophic pandemics to affect human healthcare in the latter 20th century. The best hope of controlling this pandemic is the development of a successful prophylactic vaccine. However, to date, this goal has proven to be exceptionally elusive. The recent failure of an experimental vaccine in a phase IIb study, named the STEP trial, intended solely to elicit cell-mediated immune responses against HIV-1, has highlighted the need for a balanced immune response consisting of not only cellular immunity but also a broad and potent humoral antibody response that can prevent infection with HIV-1. This article reviews the efforts made up to this point to elicit such antibody responses, especially with regard to the use of a DNA prime-protein boost regimen, which has been proven to be a highly effective platform for the induction of neutralizing antibodies in both animal and early-phase human studies.
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Affiliation(s)
- Michael Vaine
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA
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15
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Bacardí D, Amador-Cañizares Y, Cosme K, Urquiza D, Suárez J, Marante J, Viña A, Vázquez A, Concepción J, Pupo M, Aldana L, Soria Y, Romero J, Madrigal R, Martínez L, Hernández L, González I, Dueñas-Carrera S. Toxicology and biodistribution study of CIGB-230, a DNA vaccine against hepatitis C virus. Hum Exp Toxicol 2009; 28:479-91. [DOI: 10.1177/0960327109106438] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
CIGB-230, a mixture of a DNA plasmid expressing hepatitis C virus (HCV) structural antigens and a HCV recombinant capsid protein, has demonstrated to elicit strong immune responses in animals. The present study evaluated the plasmid biodistribution after the administration of CIGB-230 in mice, as well as toxicity of this vaccine candidate in rats. In the biodistribution study, mice received single or repeated intramuscular injections of CIGB-230, 50 μg of plasmid DNA mixed with 5 μg of Co.120 protein. Plasmid presence was assessed in ovaries, kidney, liver, pancreas, mesenteric ganglion, blood, and muscle of the injection site by a qualitative polymerase chain reaction. The toxicology evaluation included treatment groups receiving doses 5, 15, or 50 times higher, according to the body weight, than the expected therapeutic clinical dose. During the first hour after repeated inoculation, a promiscuous distribution was observed. However, 3 months later, plasmid could not be detected in any tissue. There was an absence of detectable adverse effects on key toxicology parameters and no damage evidenced in inspected organs and tissues. These results indicate that CIGB-230 is nontoxic at local and systemic levels and no concerns about persistence are observed, which support clinical testing of this vaccine candidate against HCV.
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Affiliation(s)
- Dania Bacardí
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba,
| | | | - Karelia Cosme
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Dioslaida Urquiza
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - José Suárez
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Jeny Marante
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Ariel Viña
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Ariel Vázquez
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Joel Concepción
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Maylín Pupo
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Lizet Aldana
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Yordanka Soria
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Juan Romero
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Roberto Madrigal
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Leticia Martínez
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Lourdes Hernández
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
| | - Idania González
- Center for Genetic Engineering and Biotechnology, Cubanacán, Playa, Havana, Cuba
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16
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Abstract
As an attractive alternative to conventional vaccines, DNA vaccines play a critical role in inducing protection against several infectious diseases. In this review, we discuss the advantages that DNA vaccines offer in comparison to conventional protein-based vaccines. We discuss strategies to improve the potency and efficacy of DNA vaccines. Specifically, we focus on the potential use of DNA-based vaccines to elicit broad-spectrum humoral and cellular immunity against influenza virus. Finally, we discuss the advances made in the use of DNA vaccines to prevent avian H5N1 influenza.
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17
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Wang S, Kennedy JS, West K, Montefiori DC, Coley S, Lawrence J, Shen S, Green S, Rothman AL, Ennis FA, Arthos J, Pal R, Markham P, Lu S. Cross-subtype antibody and cellular immune responses induced by a polyvalent DNA prime-protein boost HIV-1 vaccine in healthy human volunteers. Vaccine 2008; 26:3947-57. [PMID: 18724414 PMCID: PMC3743087 DOI: 10.1016/j.vaccine.2007.12.060] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An optimally effective AIDS vaccine would likely require the induction of both neutralizing antibody and cell-mediated immune responses, which has proven difficult to obtain in previous clinical trials. Here we report on the induction of human immunodeficiency virus type-1 (HIV-1)-specific immune responses in healthy adult volunteers that received the multi-gene, polyvalent, DNA prime-protein boost HIV-1 vaccine formulation, DP6-001, in a Phase I clinical trial. Robust cross-subtype HIV-1 specific T cell responses were detected in IFN-gamma ELISPOT assays. Furthermore, we detected high titer serum antibody responses that recognized a wide range of primary HIV-1 Env antigens and also neutralized pseudotyped viruses that express the primary Env antigens from multiple HIV-1 subtypes. These findings demonstrate that the DNA prime-protein boost approach is an effective immunization method to elicit both humoral and cell-mediated immune responses in humans, and that a polyvalent Env formulation could generate broad immune responses against HIV-1 viruses with diverse genetic backgrounds.
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Affiliation(s)
- Shixia Wang
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - Jeffrey S. Kennedy
- Center for Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - Kim West
- Center for Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - David C. Montefiori
- Department of Surgery, Duke University Medical Center, Durham, NC 27710, United States
| | - Scott Coley
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - John Lawrence
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - Siyuan Shen
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - Sharone Green
- Center for Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - Alan L. Rothman
- Center for Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - Francis A. Ennis
- Center for Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
| | - James Arthos
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institute of Health, Bethesda 20892, United States
| | - Ranajit Pal
- Department of Cell Biology, Advanced BioScience Laboratories, Kensington, MD 20895, United States
| | - Phillip Markham
- Department of Cell Biology, Advanced BioScience Laboratories, Kensington, MD 20895, United States
| | - Shan Lu
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655, United States
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18
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Wang S, Kennedy JS, West K, Montefiori DC, Coley S, Lawrence J, Shen S, Green S, Rothman AL, Ennis FA, Arthos J, Pal R, Markham P, Lu S. Cross-subtype antibody and cellular immune responses induced by a polyvalent DNA prime-protein boost HIV-1 vaccine in healthy human volunteers. Vaccine 2008; 26:1098-110. [PMID: 18243434 PMCID: PMC2288749 DOI: 10.1016/j.vaccine.2007.12.024] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2007] [Revised: 12/03/2007] [Accepted: 12/13/2007] [Indexed: 01/01/2023]
Abstract
An optimally effective AIDS vaccine would likely require the induction of both neutralizing antibody and cell-mediated immune responses, which has proven difficult to obtain in previous clinical trials. Here we report on the induction of Human Immunodeficiency Virus Type-1 (HIV-1)-specific immune responses in healthy adult volunteers that received the multi-gene, polyvalent, DNA prime-protein boost HIV-1 vaccine formulation, DP6-001, in a Phase I clinical trial conducted in healthy adult volunteers of both genders. Robust cross-subtype HIV-1-specific T cell responses were detected in IFNgamma ELISPOT assays. Furthermore, we detected high titer serum antibody responses that recognized a wide range of primary HIV-1 Env antigens and also neutralized pseudotyped viruses that express the primary Env antigens from multiple HIV-1 subtypes. These findings demonstrate that the DNA prime-protein boost approach is an effective immunization method to elicit both humoral and cell-mediated immune responses in humans, and that a polyvalent Env formulation could generate broad immune responses against HIV-1 viruses with diverse genetic backgrounds.
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Affiliation(s)
- Shixia Wang
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - Jeffrey S. Kennedy
- Center of Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - Kim West
- Center of Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | | | - Scott Coley
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - John Lawrence
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - Siyuan Shen
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - Sharone Green
- Center of Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - Alan L. Rothman
- Center of Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - Francis A. Ennis
- Center of Infectious Disease and Vaccine Research, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
| | - James Arthos
- Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institute of Health, Bethesda, 20892
| | - Ranajit Pal
- Department of Cell Biology, Advanced BioScience Laboratories, Kensington, MD 20895
| | - Phillip Markham
- Department of Cell Biology, Advanced BioScience Laboratories, Kensington, MD 20895
| | - Shan Lu
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01655
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19
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Abstract
1. Allergic diseases are characterized by inappropriate immune responses to common environmental antigens. The prevalence of these diseases has been increasing worldwide for reasons that are not exactly clear. 2. Current treatment is largely symptomatic. Because the initial observation that simple plasmid DNA injections resulted in in vivo protein expression and induction of adaptive immune responses to the encoded antigen, the potential of modifying the allergic immune responses by DNA vaccination so as to treat and prevent these diseases has been explored extensively. 3. In the present paper we review preclinical studies using animal models of allergic diseases, with an emphasis on DNA vaccine design, for house dust mite allergens-related allergic asthma.
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Affiliation(s)
- Kaw Yan Chua
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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20
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Mo Y, Quanquin NM, Vecino WH, Ranganathan UD, Tesfa L, Bourn W, Derbyshire KM, Letvin NL, Jacobs WR, Fennelly GJ. Genetic alteration of Mycobacterium smegmatis to improve mycobacterium-mediated transfer of plasmid DNA into mammalian cells and DNA immunization. Infect Immun 2007; 75:4804-16. [PMID: 17664267 PMCID: PMC2044538 DOI: 10.1128/iai.01877-06] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Mycobacteria target and persist within phagocytic monocytes and are strong adjuvants, making them attractive candidate vectors for DNA vaccines. We characterized the ability of mycobacteria to deliver transgenes to mammalian cells and the effects of various bacterial chromosomal mutations on the efficiency of transfer in vivo and in vitro. First, we observed green fluorescent protein expression via microscopy and fluorescence-activated cell sorting analysis after infection of phagocytic and nonphagocytic cell lines by Mycobacterium smegmatis or M. bovis BCG harboring a plasmid encoding the fluorescence gene under the control of a eukaryotic promoter. Next, we compared the efficiencies of gene transfer using M. smegmatis or BCG containing chromosomal insertions or deletions that cause early lysis, hyperconjugation, or an increased plasmid copy number. We observed a significant-albeit only 1.7-fold-increase in the level of plasmid transfer to eukaryotic cells infected with M. smegmatis hyperconjugation mutants. M. smegmatis strains that overexpressed replication proteins (Rep) of pAL5000, a plasmid whose replicon is incorporated in many mycobacterial constructs, generated a 10-fold increase in plasmid copy number and 3.5-fold and 3-fold increases in gene transfer efficiency to HeLa cells and J774 cells, respectively. Although BCG strains overexpressing Rep could not be recovered, BCG harboring a plasmid with a copy-up mutation in oriM resulted in a threefold increase in gene transfer to J774 cells. Moreover, M. smegmatis strains overexpressing Rep enhanced gene transfer in vivo compared with a wild-type control. Immunization of mice with mycobacteria harboring a plasmid (pgp120(h)(E)) encoding human immunodeficiency virus gp120 elicited gp120-specific CD8 T-cell responses among splenocytes and peripheral blood mononuclear cells that were up to twofold (P < 0.05) and threefold (P < 0.001) higher, respectively, in strains supporting higher copy numbers. The magnitude of these responses was approximately one-half of that observed after intramuscular immunization with pgp120(h)(E). M. smegmatis and other nonpathogenic mycobacteria are promising candidate vectors for DNA vaccine delivery.
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Affiliation(s)
- Yongkai Mo
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, NY 10461, USA
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21
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Lu S. Combination DNA plus protein HIV vaccines. ACTA ACUST UNITED AC 2006; 28:255-65. [PMID: 17021720 DOI: 10.1007/s00281-006-0028-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2006] [Accepted: 03/10/2006] [Indexed: 12/01/2022]
Abstract
A major challenge in developing an HIV vaccine is to identify immunogens and delivery methods that will elicit balanced humoral and cell mediate immunities against primary isolates of HIV with diverse sequence variations. Since the discovery of using protein coding nucleic acids (mainly DNA but also possible RNA) as a means of immunization in the early 1990s, there has been rapid progress in the creative use of this novel approach for the development of HIV vaccines. Although the initial impetus of using DNA immunization was for the induction of strong cell-mediated immunity, recent studies have greatly expanded our understanding on the potential role of DNA immunization to elicit improved quality of antibody responses. This function is particularly important to the development of HIV vaccines due to the inability of almost every previous attempt to develop broadly reactive neutralizing antibodies against primary HIV-1 isolates. Similar to the efforts of developing cell mediated immunity by using a DNA prime plus viral vector boost approach, the best antibody responses with DNA immunization were achieved when a protein boost component was included as part of the immunization schedule. Current experience has suggested that a combination DNA plus protein vaccination strategy is able to utilize the benefits of DNA and protein vaccines to effectively induce both cell-mediated immunity and antibody responses against invading organisms.
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Affiliation(s)
- Shan Lu
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
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22
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Zhao YG, Peng B, Deng H, Chen G, Yang F, Shao M, Lu H, Li Y, Peng J, Xu L, Xu Y. Anti-HBV immune responses in rhesus macaques elicited by electroporation mediated DNA vaccination. Vaccine 2006; 24:897-903. [PMID: 16253404 DOI: 10.1016/j.vaccine.2005.08.093] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2005] [Revised: 05/25/2005] [Accepted: 08/25/2005] [Indexed: 11/27/2022]
Abstract
Electroporation has been shown to be an effective method to improve the efficiency of gene expression and the immunogenicity of DNA vaccines. In order to optimize the procedure and test for its efficacy in more clinically relevant large animal models, we examined the detailed immune responses in rhesus macaques after vaccination intramuscularly with electroporation using the plasmid encoding for HBV preS(2)-S antigen and an adjuvant plasmid encoding for hIL-2 and hIFN-gamma. Several important factors were examined, including the dose response relationships, the effect of various prime and boost regimens, and different combinations of electro-pulse parameters. The immune responses were closely followed for more than a year. The results showed that in rhesus macaques, electroporation can significantly enhance the immunogenicity of the DNA vaccines, resulting in greatly improved antibody responses as well as peptide-stimulated IFN-gamma producing T cell responses. In addition, we also reported the different antibody response behaviors resulted from different electro-pulse parameters. The detailed data would be useful to suggest possible optimization strategies for better DNA vaccine efficacy.
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Affiliation(s)
- Yong-Gang Zhao
- School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, PR China
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23
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Kuck D, Leder C, Kern A, Müller M, Piuko K, Gissmann L, Kleinschmidt JA. Efficiency of HPV 16 L1/E7 DNA immunization: influence of cellular localization and capsid assembly. Vaccine 2005; 24:2952-65. [PMID: 16414157 DOI: 10.1016/j.vaccine.2005.12.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Revised: 11/11/2005] [Accepted: 12/06/2005] [Indexed: 02/02/2023]
Abstract
Infections by human papillomaviruses (HPV) are the major cause of uterine cancer in women worldwide. Aiming to develop a combined prophylactic and therapeutic vaccine we have previously demonstrated immunogenicity of chimeric virus-like particles consisting of a C-terminally truncated HPV 16 L1 capsid protein fused to an E7 portion. Here we show that genetic vaccination with a corresponding DNA was inefficient in the induction of a L1-specific prophylactic immune response. DNA immunization with C-terminally truncated HPV 16 L1 genes of different lengths revealed that only short deletions (L1(1-498)) were tolerated for eliciting a humoral immune response against viral capsids. This correlates with the observation that the C-terminal sequences are critical for nuclear localization, capsomere and capsid assembly. However, only the ability of L1 protein to form capsomeres or capsids showed a direct influence on the outcome of the immune response. C-terminal insertion of 60 amino acids of E7 was tolerated in fusion constructs, whereas insertion of full-length E7(1-98) or shuffled E7 (149 aa) completely abolished the humoral immune response. The L1(1-498)/E7(1-60) fusion construct not only induced L1-specific antibodies but also L1- and E7-specific CTL responses after DNA vaccination.
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MESH Headings
- Animals
- Antibodies, Viral/blood
- Capsid/immunology
- Capsid Proteins/genetics
- Capsid Proteins/immunology
- Cell Nucleus
- Enzyme-Linked Immunosorbent Assay
- Female
- HeLa Cells
- Human papillomavirus 16/genetics
- Human papillomavirus 16/immunology
- Humans
- Mice
- Mice, Inbred C57BL
- Nuclear Localization Signals
- Oncogene Proteins, Viral/genetics
- Oncogene Proteins, Viral/immunology
- Papillomavirus E7 Proteins
- Protein Structure, Tertiary
- Sequence Deletion
- T-Lymphocytes, Cytotoxic/immunology
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Viral Vaccines/genetics
- Viral Vaccines/immunology
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Affiliation(s)
- Dirk Kuck
- German Cancer Research Center, Programme Infection and Cancer, 69120 Heidelberg, Germany
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24
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Peng B, Zhao Y, Lu H, Pang W, Xu Y. In vivo plasmid DNA electroporation resulted in transfection of satellite cells and lasting transgene expression in regenerated muscle fibers. Biochem Biophys Res Commun 2005; 338:1490-8. [PMID: 16271701 DOI: 10.1016/j.bbrc.2005.10.111] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2005] [Accepted: 10/13/2005] [Indexed: 11/24/2022]
Abstract
In vivo plasmid DNA electroporation resulted in elevated and lasting transgene expression in skeletal muscles. But the nature of the cells that contributed to sustained gene expression remains unknown. We followed the fate of plasmid DNA delivered with electroporation and systematically investigated the time course and location of transgene expression in muscle tissues both with GFP and luciferase. Furthermore, satellite cell activation after electroporation was confirmed by RT-PCR and immunohistochemistry analysis. The activated satellite cells were shown to be able to uptake the injected plasmid DNA and express transgene products as regenerated myocytes. We found that cells with longer gene expression durations were mostly regenerated muscle fibers. In contrast, expression in pre-existing muscle fibers was rather transient. We also presented in this study that immune response to transgene products might hamper the lasting gene expression. Based on these observations, we proposed that the underlying mechanism for prolonged transgene expression in the muscles after electroporation is related to the activation and transfection of myogenic satellite cells which subsequently developed into regenerated muscle fibers.
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Affiliation(s)
- Baowei Peng
- School of Life Sciences and Biotechnology, Shanghai Jiaotong University, Shanghai, PR China
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25
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Sypniewska RK, Hoflack L, Tarango M, Gauntt S, Leal BZ, Reddick RL, Gravekamp C. Prevention of metastases with a Mage-b DNA vaccine in a mouse breast tumor model: potential for breast cancer therapy. Breast Cancer Res Treat 2005; 91:19-28. [PMID: 15868428 DOI: 10.1007/s10549-004-6454-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Anti-tumor vaccines are a relatively non-toxic alternative to conventional chemotherapeutic strategies to control breast cancer. Immunization with tumor-associated antigens (TAAs) triggers anti-tumor cytotoxic T lymphocytes (CTL), which can limit tumor progression. Here we report on the development and effectiveness of a TAA-based DNA vaccine encoding Mage-b1/2, the mouse homologue of the human MAGE-B1/2. As model system, we used immune competent Balb/c mice with syngeneic non-metastatic (64pT) or metastatic (4TO7cg) breast tumors. First, the presence of Mage-btranscripts in the 64pT and 4TO7cg breast tumors and metastases was demonstrated by RT-PCR, Southern blotting, and DNA sequencing. A DNA-based vaccine was developed from transcripts of one of the 64pT tumors, encoding the complete Mage-b1/2 protein, and subsequently tested for its preventive efficacy in both breast tumor models. Mice were immunized two times intramuscularly with the vaccine (pcDNA3.1-Mage-b1/2-V5), the control vector (pcDNA3.1-V5), or saline. Two weeks after the last immunization, the syngeneic 4TO7cg or 64pT tumor cell lines were injected in a mammary fat pad. Mice were monitored during the next 4 weeks for tumor formation, latency and size, and subsequently sacrificed for analysis. While the Mage-b1/2 vaccine had only a minor effect on the latency and growth of primary tumors, a significant and reproducible reduction in the number of 4TO7cg metastases was observed (vaccine versus control vector, p=0.0329; vaccine versus saline, p=0.0128). The observed protective efficacy of the Mage-b DNA vaccine correlated with high levels of vaccine-induced IFNgamma in spleen and lymph nodes upon re-stimulation in vitro. These results demonstrate the potential of TAA-based DNA vaccines in controlling metastatic disease in breast cancer patients.
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Affiliation(s)
- Roza K Sypniewska
- Department of Cellular and Structural Biology, University of Texas Health Science Center, STCBM building, 15355 Lambda Drive, San Antonio, TX 78245, USA
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26
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Rosati M, von Gegerfelt A, Roth P, Alicea C, Valentin A, Robert-Guroff M, Venzon D, Montefiori DC, Markham P, Felber BK, Pavlakis GN. DNA vaccines expressing different forms of simian immunodeficiency virus antigens decrease viremia upon SIVmac251 challenge. J Virol 2005; 79:8480-92. [PMID: 15956591 PMCID: PMC1143718 DOI: 10.1128/jvi.79.13.8480-8492.2005] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2004] [Accepted: 03/07/2005] [Indexed: 01/16/2023] Open
Abstract
We have tested the efficacy of DNA immunization as a single vaccination modality for rhesus macaques followed by highly pathogenic SIVmac251 challenge. To further improve immunogenicity of the native proteins, we generated expression vectors producing fusion of the proteins Gag and Env to the secreted chemokine MCP3, targeting the viral proteins to the secretory pathway and to a beta-catenin (CATE) peptide, targeting the viral proteins to the intracellular degradation pathway. Macaques immunized with vectors expressing the MCP3-tagged fusion proteins developed stronger antibody responses. Following mucosal challenge with pathogenic SIVmac251, the vaccinated animals showed a statistically significant decrease in viral load (P = 0.010). Interestingly, macaques immunized with a combination of vectors expressing three forms of antigens (native protein and MCP3 and CATE fusion proteins) showed the strongest decrease in viral load (P = 0.0059). Postchallenge enzyme-linked immunospot values for Gag and Env as well as gag-specific T-helper responses correlated with control of viremia. Our data show that the combinations of DNA vaccines producing native and modified forms of antigens elicit more balanced immune responses able to significantly reduce viremia for a long period (8 months) following pathogenic challenge with SIVmac251.
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Affiliation(s)
- Margherita Rosati
- Human Retrovirus Section, Vaccine Branch, Center for Cancer Research, Bldg. 535, Rm. 210, National Cancer Institute at Frederick, Frederick, Maryland 21702, USA
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27
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Dean HJ, Haynes J, Schmaljohn C. The role of particle-mediated DNA vaccines in biodefense preparedness. Adv Drug Deliv Rev 2005; 57:1315-42. [PMID: 15935876 DOI: 10.1016/j.addr.2005.01.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2004] [Accepted: 01/25/2005] [Indexed: 10/25/2022]
Abstract
Particle-mediated epidermal delivery (PMED) of DNA vaccines is based on the acceleration of DNA-coated gold directly into the cytoplasm and nuclei of living cells of the epidermis, facilitating DNA delivery and gene expression. Professional antigen-presenting cells and keratinocytes in the skin are both targeted, resulting in antigen presentation via direct transfection and cross-priming mechanisms. Only a small number of cells need to be transfected to elicit humoral, cellular and memory responses, requiring only a low DNA dose. In recent years, data have accumulated on the utility of PMED for delivery of DNA vaccines against a number of viral pathogens, including filoviruses, flaviviruses, poxviruses, togaviruses and bunyaviruses. PMED DNA immunization of rodents and nonhuman primates results in the generation of neutralizing antibody, cellular immunity, and protective efficacy against a broad range of viruses of public health concern.
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Affiliation(s)
- Hansi J Dean
- PowderJect Vaccines, Inc. 8551 Research Way, Middleton, WI 53562, USA.
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28
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Wang X, Wang JP, Rao XM, Price JE, Zhou HS, Lachman LB. Prime-boost vaccination with plasmid and adenovirus gene vaccines control HER2/neu+ metastatic breast cancer in mice. Breast Cancer Res 2005; 7:R580-8. [PMID: 16168101 PMCID: PMC1242122 DOI: 10.1186/bcr1199] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2005] [Revised: 04/05/2005] [Accepted: 04/21/2005] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Once metastasis has occurred, the possibility of completely curing breast cancer is unlikely, particularly for the 30 to 40% of cancers overexpressing the gene for HER2/neu. A vaccine targeting p185, the protein product of the HER2/neu gene, could have therapeutic application by controlling the growth and metastasis of highly aggressive HER2/neu+ cells. The purpose of this study was to determine the effectiveness of two gene vaccines targeting HER2/neu in preventive and therapeutic tumor models. METHODS The mouse breast cancer cell line A2L2, which expresses the gene for rat HER2/neu and hence p185, was injected into the mammary fat pad of mice as a model of solid tumor growth or was injected intravenously as a model of lung metastasis. SINCP-neu, a plasmid containing Sindbis virus genes and the gene for rat HER2/neu, and Adeno-neu, an E1,E2a-deleted adenovirus also containing the gene for rat HER2/neu, were tested as preventive and therapeutic vaccines. RESULTS Vaccination with SINCP-neu or Adeno-neu before tumor challenge with A2L2 cells significantly inhibited the growth of the cells injected into the mammary fat or intravenously. Vaccination 2 days after tumor challenge with either vaccine was ineffective in both tumor models. However, therapeutic vaccination in a prime-boost protocol with SINCP-neu followed by Adeno-neu significantly prolonged the overall survival rate of mice injected intravenously with the tumor cells. Naive mice vaccinated using the same prime-boost protocol demonstrated a strong serum immunoglobulin G response and p185-specific cellular immunity, as shown by the results of ELISPOT (enzyme-linked immunospot) analysis for IFNgamma. CONCLUSION We report herein that vaccination of mice with a plasmid gene vaccine and an adenovirus gene vaccine, each containing the gene for HER2/neu, prevented growth of a HER2/neu-expressing breast cancer cell line injected into the mammary fat pad or intravenously. Sequential administration of the vaccines in a prime-boost protocol was therapeutically effective when tumor cells were injected intravenously before the vaccination. The vaccines induced high levels of both cellular and humoral immunity as determined by in vitro assessment. These findings indicate that clinical evaluation of these vaccines, particularly when used sequentially in a prime-boost protocol, is justified.
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MESH Headings
- Animals
- Cancer Vaccines
- Cell Line, Tumor
- Female
- Genes, erbB-2/immunology
- Immunization, Secondary
- Interferon-gamma/biosynthesis
- Lung Neoplasms/pathology
- Lung Neoplasms/secondary
- Mammary Glands, Animal/pathology
- Mammary Neoplasms, Experimental/genetics
- Mammary Neoplasms, Experimental/immunology
- Mammary Neoplasms, Experimental/pathology
- Mice
- Mice, Inbred BALB C
- Mice, Transgenic
- Neoplasm Metastasis/immunology
- Neoplasm Metastasis/prevention & control
- Rats
- Receptor, ErbB-2/genetics
- Receptor, ErbB-2/immunology
- Sindbis Virus/immunology
- Spleen/immunology
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Affiliation(s)
- Xiaoyan Wang
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Program in Immunology, The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA
| | - Jian-Ping Wang
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Xiao-Mei Rao
- Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Janet E Price
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Heshan S Zhou
- Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Lawrence B Lachman
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Program in Immunology, The University of Texas Graduate School of Biomedical Sciences at Houston, Houston, TX, USA
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29
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Abstract
Targeting vaccines to the skin epidermis results in the activation of an immune inductive site that is rich in antigen-presenting cells. The superficial location of the skin makes it accessible to vaccine delivery. However, it is difficult to access the epidermis using needle and syringe delivery, and vaccine antigens are too large to be effectively delivered using standard topical formulations. Needle-free vaccine delivery systems have been developed for efficient delivery of particulate vaccines into the epidermal tissue. Particle-mediated epidermal delivery of DNA vaccines is based on the delivery of DNA-coated gold particles directly into the cytoplasm and nuclei of living cells of the epidermis, facilitating DNA delivery and gene expression. Alternatively, protein vaccines can be formulated into a dense powder, which can be propelled into the skin epidermis by epidermal powder immunisation using similar delivery devices and principles, but in this instance the protein is delivered to the extracellular space. Preclinical and clinical data will be reviewed, demonstrating applications of epidermal vaccine delivery to a wide range of experimental infectious disease vaccines.
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30
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Stambas J, Brown SA, Gutierrez A, Sealy R, Yue W, Jones B, Lockey TD, Zirkel A, Freiden P, Brown B, Surman S, Coleclough C, Slobod KS, Doherty PC, Hurwitz JL. Long lived multi-isotype anti-HIV antibody responses following a prime-double boost immunization strategy. Vaccine 2005; 23:2454-64. [PMID: 15752831 DOI: 10.1016/j.vaccine.2004.10.030] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2004] [Revised: 10/10/2004] [Accepted: 10/28/2004] [Indexed: 10/26/2022]
Abstract
Despite decades of work, an effective HIV vaccine remains elusive. In an effort to elicit protective immunity, investigators have sought to define vaccines able to elicit durable HIV-specific B-cell and T-cell activities. Additionally, vaccines are sought which can induce antibodies of a variety of isotypes, as each isotype possesses unique attributes in terms of opsonization, Fc receptor binding capacity, complement fixation and location. One prominent new vaccine strategy, applied to numerous distinct antigenic systems is the prime boost-regimen, with DNA, vaccinia virus (VV), and/or purified recombinant protein. To examine the durability, location and isotype distribution of responses induced by prime-boost regimens, we tested successive immunizations with DNA, VV and protein (D-V-P), comparing three forms of protein inoculations: (i) purified protein administered intramuscularly with complete Freunds adjuvant, (ii) purified protein administered intranasally, and (iii) purified protein conjugated to oxidized mannan, administered intranasally. We found that all three protocols elicited serum antibodies of multiple isotypes, with serum IgA being most prominent among mice immunized with mannan-conjugated protein. All D-V-P protocols, regardless of protein form or route, also elicited antibody responses at mucosal surfaces. In bronchoalveolar lavage, a tendency toward IgA production was again most prominent in mice boosted with the protein-mannan conjugate. Both B-cell and T-cell responses were sustained for more than 1 year post-immunization following each form of vaccination. Contemporaneous with long-lasting serum and mucosal antibodies were antibody forming cells in the bone marrow of primed animals. Results highlight the D-V-P vaccination strategy as a promising approach for attaining durable, multi-isotype B-cell and T-cell activities toward HIV.
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Affiliation(s)
- J Stambas
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
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31
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Abstract
The DNA vaccine has proven to be one of the most promising applications in the field of gene therapy. Due to its unique ability to readily induce humoral as well as cellular immune responses, it attracted great interest when the concept was first confirmed in the early 1990s. After thousands of articles related to the DNA vaccine were published, scientists began to realize that although the DNA vaccine is very effective in small animal models, its effectiveness in recent clinical trails is rather disappointing. Therefore, current effort has been shifted to understanding the different performance of the DNA vaccine in mouse and large animal models and on how to transfer the success of the DNA vaccine in small animals to large animals and humans.
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Affiliation(s)
- Zhengrong Cui
- Department of Pharmaceutical Sciences, College of Pharmacy Oregon State University, Corvallis, Oregon 97331, USA
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32
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Abstract
Development of a vaccine against human immunodeficiency virus type 1 (HIV-1) is the main hope for controlling the acquired immunodeficiency syndrome pandemic. An ideal HIV vaccine should induce neutralizing antibodies, CD4+ helper T cells, and CD8+ cytotoxic T cells. While the induction of broadly neutralizing antibodies remains a highly challenging goal, there are a number of technologies capable of inducing potent cell-mediated responses in animal models, which are now starting to be tested in humans. Naked DNA immunization is one of them. This review focuses on the stimulation of HIV-specific T cells and discusses in the context of the current 'state-of-art' of DNA vaccines, the areas where this technology might assist either alone or as a part of more complex vaccine formulations in the HIV vaccine development.
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Affiliation(s)
- Marie J Estcourt
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Oxford, UK
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33
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Babiuk S, Mookherjee N, Pontarollo R, Griebel P, van Drunen Littel-van den Hurk S, Hecker R, Babiuk L. TLR9-/- and TLR9+/+ mice display similar immune responses to a DNA vaccine. Immunology 2004; 113:114-20. [PMID: 15312142 PMCID: PMC1782555 DOI: 10.1111/j.1365-2567.2004.01938.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Plasmid DNA continues to attract interest as a potential vaccine-delivery vehicle. However, the mechanisms whereby immune responses are elicited by plasmids are not fully understood. Although there have been suggestions regarding the importance of CpG motifs in plasmid immunogenicity, the molecular mechanisms by which CpG motifs enhance immune responses to DNA vaccines are not well understood. As Toll-like receptor 9-deficient (TLR9-/-) mice fail to respond to the adjuvant effects of CpG oligonucleotides, we used these mice to determine the effect of CpG motifs in plasmids used for DNA immunization. In the study described below, we report that DNA immunization was as effective in eliciting antigen-specific antibody and at stimulating antigen-specific interferon-gamma (IFN-gamma)-secreting cells in TLR9-/- mice as in TLR9+/+ mice. This study illustrates that DNA vaccines elicit immune responses by multiple mechanisms and demonstrates that TLR9 is not essential for the induction of immune responses following DNA immunization.
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Affiliation(s)
- Shawn Babiuk
- Pyxis Genomics Canada, Saskatoon, Saskatchewan, Canada
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34
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Wang S, Heilman D, Liu F, Giehl T, Joshi S, Huang X, Chou TH, Goguen J, Lu S. A DNA vaccine producing LcrV antigen in oligomers is effective in protecting mice from lethal mucosal challenge of plague. Vaccine 2004; 22:3348-57. [PMID: 15308359 PMCID: PMC7126436 DOI: 10.1016/j.vaccine.2004.02.036] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2003] [Accepted: 02/29/2004] [Indexed: 11/26/2022]
Abstract
There is an urgent need to develop effective vaccines against pneumonic plague, a highly lethal and contagious disease caused by the Gram-negative bacterium Yersinia pestis. Here we demonstrate that a novel DNA vaccine expressing a modified V antigen (LcrV) of Y. pestis, with a human tissue plasminogen activator (tPA) signal sequence, elicited strong V-specific antibody responses in BALB/c mice. This tPA-V DNA vaccine protected mice from intranasal challenge with lethal doses of Y. pestis. In comparison, a DNA vaccine expressing the wild type V antigen was much less effective. Only tPA-V formed oligomers spontaneously, and elicited a higher IgG2a anti-V antibody response in immunized mice, suggesting increased TH1 type cellular immune response. Our data indicate that antigen engineering is effective in inducing high quality protective immune responses against conformationally sensitive antigens. These results support that optimized DNA vaccines have the potential to protect against bacterial pathogens than is generally recognized.
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Affiliation(s)
- Shixia Wang
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
| | - Destin Heilman
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
| | - Fangjun Liu
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
| | - Theodore Giehl
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
| | - Swati Joshi
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
| | - Xiaoyun Huang
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
| | - Te-hui Chou
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
| | - Jon Goguen
- Department of Molecular Genetics and Microbiology, University of Massachusetts Medical School, Worcester, MA 01655, USA
| | - Shan Lu
- Laboratory of Nucleic Acid Vaccines, Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
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35
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Otero M, Calarota SA, Felber B, Laddy D, Pavlakis G, Boyer JD, Weiner DB. Resiquimod is a modest adjuvant for HIV-1 gag-based genetic immunization in a mouse model. Vaccine 2004; 22:1782-90. [PMID: 15068862 DOI: 10.1016/j.vaccine.2004.01.037] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
DNA vaccines have been effective at generating useful immune responses in many animal species. However, it is clearly desirable to increase their potency. The identification of adjuvants that increase their cell-mediated immune (CMI) response is therefore an important goal. Resiquimod is an imiquimod analog proven to activate dendritic cells through TLR-7. The adjuvant capacity of resiquimod has not, to our knowledge, been studied in the context of genetic immunization. Here, we studied resiquimod as an adjuvant for plasmid vaccine therapy by intra-muscular immunization of BALB/c mice with HIV-1 gag DNA vaccine without and with several concentrations of resiquimod (ranging from 5-100nM). We observed that resiquimod moderately enhanced IFN-gamma production as measured by a peptide-based ELISPOT assay compared to that obtained in mice immunized with DNA gag only. Antigen-specific T-cell proliferation studies showed a several-fold increase in the stimulation index in mice immunized with DNA gag +50 nM of resiquimod as compared to mice receiving DNA gag alone. Antibody titer also increased, while the antibody isotyping data showed a strong Th1 biased type response. Analysis of cytokine production in serum samples demonstrated a stronger Th1 cytokine bias in the presence of resiquimod. Furthermore, relevant increase in IL-4 production, as measured by ELISPOT assay, was not observed. Our results show that resiquimod can have modest adjuvant activity, in a DNA formulation, driving the immune system towards a cell-mediated immune response. Additional studies involving this adjuvant for DNA vaccines are underway.
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Affiliation(s)
- Miguel Otero
- Department of Pathology, School of Medicine, University of Pennsylvania, 422 Curie Blvd., 505 Stellar-Chance Bldg., Philadelphia, PA 19104-6100, USA
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36
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Mwau M, Cebere I, Sutton J, Chikoti P, Winstone N, Wee EGT, Beattie T, Chen YH, Dorrell L, McShane H, Schmidt C, Brooks M, Patel S, Roberts J, Conlon C, Rowland-Jones SL, Bwayo JJ, McMichael AJ, Hanke T. A human immunodeficiency virus 1 (HIV-1) clade A vaccine in clinical trials: stimulation of HIV-specific T-cell responses by DNA and recombinant modified vaccinia virus Ankara (MVA) vaccines in humans. J Gen Virol 2004; 85:911-919. [PMID: 15039533 DOI: 10.1099/vir.0.19701-0] [Citation(s) in RCA: 171] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The immunogenicities of candidate DNA- and modified vaccinia virus Ankara (MVA)-vectored human immunodeficiency virus (HIV) vaccines were evaluated on their own and in a prime-boost regimen in phase I clinical trials in healthy uninfected individuals in the United Kingdom. Given the current lack of approaches capable of inducing broad HIV-neutralizing antibodies, the pTHr.HIVA DNA and MVA.HIVA vaccines focus solely on the induction of cell-mediated immunity. The vaccines expressed a common immunogen, HIVA, which consists of consensus HIV-1 clade A Gag p24/p17 proteins fused to a string of clade A-derived epitopes recognized by cytotoxic T lymphocytes (CTLs). Volunteers' fresh peripheral blood mononuclear cells were tested for HIV-specific responses in a validated gamma interferon enzyme-linked immunospot (ELISPOT) assay using four overlapping peptide pools across the Gag domain and three pools of known CTL epitopes present in all of the HIVA protein. Both the DNA and the MVA vaccines alone and in a DNA prime-MVA boost combination were safe and induced HIV-specific responses in 14 out of 18, seven out of eight and eight out of nine volunteers, respectively. These results are very encouraging and justify further vaccine development.
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MESH Headings
- AIDS Vaccines/adverse effects
- AIDS Vaccines/genetics
- AIDS Vaccines/immunology
- AIDS Vaccines/pharmacology
- Adolescent
- Adult
- Female
- Gene Products, gag
- HIV Antibodies/biosynthesis
- HIV Antigens
- HIV Core Protein p24
- HIV-1/immunology
- Humans
- Immunization, Secondary
- Injections, Intradermal
- Injections, Intramuscular
- Male
- Middle Aged
- Safety
- T-Lymphocytes/immunology
- Vaccines, DNA/adverse effects
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, DNA/pharmacology
- Vaccines, Synthetic/adverse effects
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Vaccines, Synthetic/pharmacology
- Vaccinia virus/genetics
- Vaccinia virus/immunology
- Viral Proteins
- gag Gene Products, Human Immunodeficiency Virus
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Affiliation(s)
- Matilu Mwau
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Inese Cebere
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Julian Sutton
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Priscilla Chikoti
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Nicola Winstone
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Edmund G-T Wee
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Tara Beattie
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | | | - Lucy Dorrell
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Helen McShane
- Nuffield Department of Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Claudia Schmidt
- International AIDS Vaccine Initiative, 110 William Street, New York, NY 10038, USA
| | - Mary Brooks
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Sandip Patel
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Joanna Roberts
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Christopher Conlon
- Nuffield Department of Medicine, John Radcliffe Hospital, Oxford OX3 9DU, UK
| | - Sarah L Rowland-Jones
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Job J Bwayo
- Department of Medical Microbiology, University of Nairobi, Nairobi, Kenya
| | - Andrew J McMichael
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
| | - Tomáš Hanke
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, The John Radcliffe, Oxford OX3 9DS, UK
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37
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Mimran A, Mor F, Carmi P, Quintana FJ, Rotter V, Cohen IR. DNA vaccination with CD25 protects rats from adjuvant arthritis and induces an antiergotypic response. J Clin Invest 2004; 113:924-32. [PMID: 15067325 PMCID: PMC362112 DOI: 10.1172/jci17772] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2003] [Accepted: 01/13/2004] [Indexed: 11/17/2022] Open
Abstract
Ab's to the alpha-chain of the IL-2 receptor (anti-CD25) are used clinically to achieve immunosuppression. Here we investigated the effects of DNA vaccination with the whole CD25 gene on the induction of rat adjuvant arthritis. The DNA vaccine protected the rats and led to a shift in the cytokine profile of T cells responding to disease target antigens from Th1 to Th2. The mechanism of protection was found to involve the induction of an antiergotypic response, rather than the induction of anti-CD25 Ab's. Antiergotypic T cells respond to activation molecules, ergotopes, expressed on syngeneic activated, but not resting, T cells. CD25-derived peptides function as ergotopes that can be recognized by the antiergotypic T cells. Antiergotypic T cells taken from control sick rats did not proliferate against activated T cells and secreted mainly IFN-gamma. In contrast, antiergotypic cells from CD25-DNA-protected rats proliferated against activated T cells and secreted mainly IL-10. Protective antiergotypic T cells were found in both the CD4+ and CD8+ populations and expressed alpha/beta or gamma/delta T cell receptors. Antiergotypic alpha/beta T cells were MHC restricted, while gamma/delta T cells were MHC independent. Thus, CD25 DNA vaccination may induce protection from autoimmunity by inducing a cytokine shift in both the antiergotypic response and the response to the antigens targeted in the disease.
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Affiliation(s)
- Avishai Mimran
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
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38
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Mimran A, Mor F, Carmi P, Quintana FJ, Rotter V, Cohen IR. DNA vaccination with CD25 protects rats from adjuvant arthritis and induces an antiergotypic response. J Clin Invest 2004. [PMID: 15067325 DOI: 10.1172/jci200417772] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Ab's to the alpha-chain of the IL-2 receptor (anti-CD25) are used clinically to achieve immunosuppression. Here we investigated the effects of DNA vaccination with the whole CD25 gene on the induction of rat adjuvant arthritis. The DNA vaccine protected the rats and led to a shift in the cytokine profile of T cells responding to disease target antigens from Th1 to Th2. The mechanism of protection was found to involve the induction of an antiergotypic response, rather than the induction of anti-CD25 Ab's. Antiergotypic T cells respond to activation molecules, ergotopes, expressed on syngeneic activated, but not resting, T cells. CD25-derived peptides function as ergotopes that can be recognized by the antiergotypic T cells. Antiergotypic T cells taken from control sick rats did not proliferate against activated T cells and secreted mainly IFN-gamma. In contrast, antiergotypic cells from CD25-DNA-protected rats proliferated against activated T cells and secreted mainly IL-10. Protective antiergotypic T cells were found in both the CD4+ and CD8+ populations and expressed alpha/beta or gamma/delta T cell receptors. Antiergotypic alpha/beta T cells were MHC restricted, while gamma/delta T cells were MHC independent. Thus, CD25 DNA vaccination may induce protection from autoimmunity by inducing a cytokine shift in both the antiergotypic response and the response to the antigens targeted in the disease.
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Affiliation(s)
- Avishai Mimran
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
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39
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Srinivasan R, Wolchok JD. Tumor antigens for cancer immunotherapy: therapeutic potential of xenogeneic DNA vaccines. J Transl Med 2004; 2:12. [PMID: 15090064 PMCID: PMC419720 DOI: 10.1186/1479-5876-2-12] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2004] [Accepted: 04/16/2004] [Indexed: 12/11/2022] Open
Abstract
Preclinical animal studies have convincingly demonstrated that tumor immunity to self antigens can be actively induced and can translate into an effective anti-tumor response. Several of these observations are being tested in clinical trials. Immunization with xenogeneic DNA is an attractive approach to treat cancer since it generates T cell and antibody responses. When working in concert, these mechanisms may improve the efficacy of vaccines. The use of xenogeneic DNA in overcoming immune tolerance has been promising not only in inbred mice with transplanted tumors but also in outbred canines, which present with spontaneous tumors, as in the case of human. Use of this strategy also overcomes limitations seen in other types of cancer vaccines. Immunization against defined tumor antigens using a xenogeneic DNA vaccine is currently being tested in early phase clinical trials for the treatment of melanoma and prostate cancers, with proposed trials for breast cancer and Non-Hodgkin's Lymphoma.
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Affiliation(s)
- Roopa Srinivasan
- Division of Tumor Immunology, Dept. of Research, CancerVaxCorporation, 2110 Rutherford Road, Carlsbad, CA 92008, USA
| | - Jedd D Wolchok
- Swim Across America Laboratory, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, NY 10021, USA
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40
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Liu F, Mboudjeka I, Shen S, Chou THW, Wang S, Ross TM, Lu S. Independent but not synergistic enhancement to the immunogenicity of DNA vaccine expressing HIV-1 gp120 glycoprotein by codon optimization and C3d fusion in a mouse model. Vaccine 2004; 22:1764-72. [PMID: 15068860 DOI: 10.1016/j.vaccine.2003.09.054] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The ability to elicit humoral and cell-mediated immune (CMI) responses from DNA immunization by combinational use of codon optimization and C3d component of complement was evaluated in this study. DNA vaccines that express either the wild type or the codon optimized gp120 gene coding for the envelope (Env) glycoprotein of human immunodeficiency virus (HIV-1) from the primary isolate JR-FL strain were compared to the same forms fused to three tandem copies of the murine C3d genes. Either codon optimization or C3d fusion alone was effective at generating early appearance, higher binding and neutralizing antibody responses. We also observed that cell-mediated immune responses against HIV Env could also be enhanced by C3d fusion. However, for both humoral and CMI responses, there were no synergistic effects when the combination of codon optimization and C3d fusion was employed.
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Affiliation(s)
- Fangjun Liu
- Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, Lazare Research Building, Worcester, MA 01605, USA
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41
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Wilson CC, McKinney D, Anders M, MaWhinney S, Forster J, Crimi C, Southwood S, Sette A, Chesnut R, Newman MJ, Livingston BD. Development of a DNA vaccine designed to induce cytotoxic T lymphocyte responses to multiple conserved epitopes in HIV-1. THE JOURNAL OF IMMUNOLOGY 2004; 171:5611-23. [PMID: 14607970 DOI: 10.4049/jimmunol.171.10.5611] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Epitope-based vaccines designed to induce CTL responses specific for HIV-1 are being developed as a means for addressing vaccine potency and viral heterogeneity. We identified a set of 21 HLA-A2, HLA-A3, and HLA-B7 restricted supertype epitopes from conserved regions of HIV-1 to develop such a vaccine. Based on peptide-binding studies and phenotypic frequencies of HLA-A2, HLA-A3, and HLA-B7 allelic variants, these epitopes are predicted to be immunogenic in greater than 85% of individuals. Immunological recognition of all but one of the vaccine candidate epitopes was demonstrated by IFN-gamma ELISPOT assays in PBMC from HIV-1-infected subjects. The HLA supertypes of the subjects was a very strong predictor of epitope-specific responses, but some subjects responded to epitopes outside of the predicted HLA type. A DNA plasmid vaccine, EP HIV-1090, was designed to express the 21 CTL epitopes as a single Ag and tested for immunogenicity using HLA transgenic mice. Immunization of HLA transgenic mice with this vaccine was sufficient to induce CTL responses to multiple HIV-1 epitopes, comparable in magnitude to those induced by immunization with peptides. The CTL induced by the vaccine recognized target cells pulsed with peptide or cells transfected with HIV-1 env or gag genes. There was no indication of immunodominance, as the vaccine induced CTL responses specific for multiple epitopes in individual mice. These data indicate that the EP HIV-1090 DNA vaccine may be suitable for inducing relevant HIV-1-specific CTL responses in humans.
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MESH Headings
- AIDS Vaccines/administration & dosage
- AIDS Vaccines/chemical synthesis
- AIDS Vaccines/immunology
- Adult
- Amino Acid Motifs/immunology
- Animals
- Cell Line, Transformed
- Conserved Sequence/immunology
- Cytotoxicity Tests, Immunologic/methods
- Drug Evaluation, Preclinical
- Enzyme-Linked Immunosorbent Assay
- Epitopes, T-Lymphocyte/immunology
- Epitopes, T-Lymphocyte/isolation & purification
- HIV Infections/immunology
- HIV-1/immunology
- HIV-1/isolation & purification
- HLA-A2 Antigen/genetics
- HLA-A2 Antigen/immunology
- HLA-A3 Antigen/genetics
- HLA-A3 Antigen/immunology
- HLA-B7 Antigen/genetics
- HLA-B7 Antigen/immunology
- Histocompatibility Testing
- Humans
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/virology
- Mice
- Mice, Transgenic
- Predictive Value of Tests
- Superantigens/immunology
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/virology
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/chemical synthesis
- Vaccines, DNA/immunology
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Affiliation(s)
- Cara C Wilson
- University of Colorado Health Sciences Center, Denver, CO 80262, USA
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42
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Babiuk S, Baca-Estrada ME, Foldvari M, Baizer L, Stout R, Storms M, Rabussay D, Widera G, Babiuk L. Needle-free topical electroporation improves gene expression from plasmids administered in porcine skin. Mol Ther 2003; 8:992-8. [PMID: 14664802 DOI: 10.1016/j.ymthe.2003.09.008] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Electroporation has been shown to increase the potency of DNA vaccines that have demonstrated significant potential in mice. However, there is a need to develop noninvasive or minimally invasive vaccination methods. In pigs, in vivo gene expression was assessed to compare intradermal needle injection to a needle-free dermal BioJect as a means of delivery of plasmids. Each administration method was further tested with and without surface electroporation. Experiments with plasmid DNA encoding luciferase demonstrated that needle-free administration results in higher gene expression levels than needle injection. Electroporation enhanced gene expression for both intradermal delivery methods. Needle-free plasmid injection in combination with electroporation led to a more rapid induction of immune responses compared to other methods of plasmid administration. It was concluded that needle-free topical electroporation significantly enhances gene expression, possibly by improving cellular uptake of plasmid DNA.
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Affiliation(s)
- Shawn Babiuk
- Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E3, Canada.
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43
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Leifert JA, Holler PD, Harkins S, Kranz DM, Whitton JL. The cationic region from HIV tat enhances the cell-surface expression of epitope/MHC class I complexes. Gene Ther 2003; 10:2067-73. [PMID: 14595379 DOI: 10.1038/sj.gt.3302115] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The potential of genetic immunization has been acknowledged for almost a decade, but disappointing immunogenicity in humans has delayed its introduction into the clinical arena. To try to increase the potency of genetic immunization, we and others have evaluated 'translocatory' proteins, which are thought to exit living cells by an uncharacterized pathway, and enter neighboring cells in an energy-independent manner. Several laboratories, including our own, have begun to question these remarkable properties. Our previous studies showed that the ability of an epitope to induce major histocompatibility complex (MHC) class I restricted CD8(+) T cells was, indeed, enhanced by its being attached to the proposed translocatory sequence of the HIV-1 tat protein. However, we found little evidence that the increased immunogenicity resulted from transfer of the fusion peptide between living cells, and we proposed that it resulted instead from an increased epitope/MHC expression on the surface of transfected cells. Here, we directly test this hypothesis. We show that cells cotransfected with plasmids encoding an epitope, and the relevant MHC class I allele, can stimulate epitope-specific T cells, and that attachment of the epitope to a putative translocatory sequence - which we term herein an 'integral cationic region' (ICR) - leads to a marked increase in stimulatory activity. This elevated stimulatory capacity does not result from a nonspecific increase in MHC class I expression. We use a high-affinity T-cell receptor (TcR) specific for the epitope/MHC combination to quantitate directly the cell-surface expression of the immunogenic complex, and we show that the attachment of the tat ICR to an epitope results in a substantial enhancement of its cell-surface presentation. These data suggest an alternative explanation for the immune enhancement seen with ICRs.
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Affiliation(s)
- J A Leifert
- Department of Neuropharmacology, The Scripps Research Institute, La Jolla, CA 92037, USA
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44
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Abstract
Gene therapy is envisioned as a potentially definitive treatment for a variety of diseases that have a genetic etiology. We reviewed trials of clinical gene therapy for nonmalignant, single-gene, and multifactorial disorders and infectious diseases, and found limited evidence suggesting that gene therapy may benefit patients who have severe, combined, immunodeficiency disorder; cystic fibrosis; coronary artery disease or peripheral arterial disease; or hemophilia. Effective gene therapy requires the targeted transfer of exogenous genetic material into human cells and the subsequent regulated expression of the corresponding gene product. Because no phase 3 randomized controlled trials have been completed that fulfill these criteria, it is difficult to correlate signs of clinical benefit with the administration of gene therapy in any disease. Additional clinical and basic research is needed to determine the future role of gene therapy.
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Affiliation(s)
- Thomas A Ratko
- Clinical Knowledge Services, University HealthSystem Consortium, Oak Brook, Illinois 60523-1890, USA.
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45
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Dayball K, Millar J, Miller M, Wan YH, Bramson J. Electroporation Enables Plasmid Vaccines to Elicit CD8+T Cell Responses in the Absence of CD4+T Cells. THE JOURNAL OF IMMUNOLOGY 2003; 171:3379-84. [PMID: 14500631 DOI: 10.4049/jimmunol.171.7.3379] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In vivo electroporation dramatically enhances plasmid vaccine efficacy. This enhancement can be attributed to increased plasmid delivery and, possibly, to some undefined adjuvant properties. Previous reports have demonstrated CD8(+) T cell priming by plasmid vaccines is strongly dependent upon CD4(+) T cell help. Indeed, the efficacy of a plasmid vaccine expressing Escherichia coli beta-galactosidase was severely attenuated in MHC class II-deficient (C2D) mice. To determine whether electroporation could compensate for the absence of CD4(+) T cell help, C2D mice were immunized by a single administration of plasmid in combination with electroporation using two conditions which differed only by the duration of the pulse (20 or 50 msec). Both conditions elicited robust cellular and humoral responses in wild-type mice, as measured by IFN-gamma ELISPOT, anti-beta-galactosidase ELISA, and protection from virus challenge. In C2D mice, the cellular response produced by the vaccine combined with the 50-msec pulse, as measured by ELISPOT, was identical to the response in wild-type mice. The 20-msec pulse elicited a milder response that was approximately one-fifth that of the response elicited by the 50-msec pulse. By contrast, the 20-msec conditions provided comparable protection in both wild-type and C2D recipients whereas the protection elicited by the 50-msec conditions in C2D mice was weaker than in wild-type mice. Further investigation is required to understand the discordance between the ELISPOT results and outcome of virus challenge in the C2D mice. Nonetheless, using this technique to prime CD8(+) T cells using plasmid vaccines may prove extremely useful when immunizing hosts with limiting CD4(+) T cell function, such as AIDS patients.
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Affiliation(s)
- Kelley Dayball
- Center for Gene Therapeutics, Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
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46
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Abstract
DNA vaccines have been widely used in laboratory animals and non-human primates over the last decade to induce antibody and cellular immune responses. This approach has shown some promise, in models of infectious diseases of both bacterial and viral origin as well as in tumour models. Clinical trials have shown that DNA vaccines appear safe and well tolerated, but need to be made much more potent to be candidates for preventive immunisation of humans. This review describes recent work to improve the delivery of plasmid DNA vaccines and also to increase the immunogenicity of antigens expressed from the DNA vaccine plasmids, including various formulations and molecular adjuvants. Because DNA vaccines are relatively new and represent a novel vaccine technology, certain safety issues, such as the potential for induction of autoimmune disease and integration into the host genome, must be examined carefully. If potency can be improved and safety established, plasmid DNA vaccines offer advantages in speed, simplicity, and breadth of immune response that may be useful for the immunisation of humans against infectious diseases and cancers.
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Affiliation(s)
- John Donnelly
- Chiron Corporation, 4560 Horton Street--M/S 4.3, Emeryville, CA 94608, USA
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47
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Abstract
The DNA vaccines are simple rings of DNA containing a gene encoding an antigen, and a promoter/terminator to make the gene express in mammalian cells. They are a promising new approach for generating all types of desired immunity: cytolytic T lymphocytes (CTL), T helper cells and antibodies, whilst being a technology that has the potential for global usage in terms of manufacturing ease, broad population administration and safety. This review gives an overview of the mechanisms, preclinical and clinical efficacy of DNA vaccines, and point out the limitations of the first generation of such vaccines, and some of the promising second-generation developments. This technology is also being utilized in the field of proteomics as a tool to elucidate the function of genes. The breadth of applications for DNA vaccines thus ranges from prophylactic vaccines to immunotherapy for infectious diseases, cancer, and autoimmune and allergic diseases.
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Affiliation(s)
- M A Liu
- Transgene, Strasbourg, France.
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48
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Kamata M, Denda-Nagai K, Kubota N, Aida S, Takeda K, Irimura T. Vaccination of mice with MUC1 cDNA suppresses the development of lung metastases. Clin Exp Metastasis 2003; 19:689-96. [PMID: 12553374 DOI: 10.1023/a:1021332932531] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
C57BL/6 mice were immunized intradermally with various doses of purified pCEP4 plasmid DNA containing full-length MUC1 cDNA (22 tandem repeats). Mice immunized with MUC1 DNA three times at weekly intervals had serum antibodies to a synthetic peptide corresponding to the tandem repeats of MUC1. The antibody titer correlated with the plasmid DNA dose. After the third immunization mice were injected intravenously with 5 x 10(5) 16-F10 melanoma cells that had been stably transfected with MUC1 cDNA (F10-MUC1-C8 clone cells). The number of lung metastatic nodules three weeks after inoculation of F10-MUC1-C8 cells was significantly lower in mice immunized with MUC1 plasmid DNA than in mice immunized with the vector DNA alone. Thus, the suppression of lung metastasis was antigen-specific. In vivo depletion of lymphocyte subpopulations by specific antibodies revealed that natural killer cells are the major effector cells responsible for the suppression of lung metastasis. CD4+ cells and CD8+ cells apparently played some roles too.
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Affiliation(s)
- Mika Kamata
- Laboratory of Cancer Biology and Molecular Immunology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo,Japan
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49
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Abstract
The identification of antigens on tumor cells has led to significant contributions to the field of immunotherapy. One of the most active areas under investigation in cancer immunotherapy is the development of vaccines against melanoma antigens. Induction of immunity against tumor antigens can follow multiple routes using different mechanisms. Crucial to the development of active immunization and other immunotherapies is the discovery and understanding of the molecular identity of antigens and the mechanisms involved in tumor immunity, as well as escape from immunity. In this review, we will discuss strategies to induce active immunity against melanoma.
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Affiliation(s)
- Miguel-Angel Perales
- Clinical Immunology Service, Department of Medicine, Memorial Sloan-Kettering Cancer Center and Joan and Sanford I. Weill Medical College of Cornell University, 1275 York Avenue, New York, NY 10021, USA.
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50
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Edgeworth RL, San JH, Rosenzweig JA, Nguyen NL, Boyer JD, Ugen KE. Vaccine development against HIV-1: current perspectives and future directions. Immunol Res 2002; 25:53-74. [PMID: 11868934 DOI: 10.1385/ir:25:1:53] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The development of an efficacious vaccine against the human immunodeficiency virus (HIV) is of great urgency, because it is accepted that vaccination is the only means capable of controlling the AIDS pandemic. The foundation of HIV vaccine development is the analysis of immune responses during natural infection and the utilization of this knowledge for the development of protective immunization strategies. Initial vaccine development and experimentation are usually in animal models, including murine, feline, and nonhuman primates. Experimental vaccine candidates are closely studied for both efficacy and safety before proceeding to human clinical trials. There are a number of different therapeutic and prophylactic vaccine strategies currently being studied in human clinical trials. Vaccine strategies that are being tested, or have previously been tested, in humans include subunit, DNA plasmid, and viral vector, and combinations of these various strategies. Some of the results of these trials are promising, and additional research has focused on the development of appropriate chemical and genetic adjuvants as well as methods of vaccine delivery to improve the host immune response. This review summarizes the vaccine strategies that have been tested in both animal models and human clinical trials.
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Affiliation(s)
- Rebecca L Edgeworth
- Department of Medical Microbiology and Immunology, University of South Florida, College of Medicine, Tampa 33612, USA
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