1
|
Firstova VV, Shakhova AS, Riabko AK, Silkina MV, Zeninskaya NA, Romanenko YO, Marin MA, Rogozin MM, Kartseva AS, Dyatlov IA, Shemyakin IG. Characterization of the adaptive immune response of donors receiving live anthrax vaccine. PLoS One 2021; 16:e0260202. [PMID: 34928976 PMCID: PMC8687594 DOI: 10.1371/journal.pone.0260202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 11/04/2021] [Indexed: 11/19/2022] Open
Abstract
Live anthrax vaccine containing spores from attenuated strains STI-1 of Bacillus anthracis is used in Russia and former CIS (Commonwealth of Independent States) to prevent anthrax. In this paper we studied the duration of circulation of antibodies specific to spore antigens, the protective antigen (PA), the lethal factor (LF) and their domains (D) in donors’ blood at different times after their immunization with live anthrax vaccine. The relationship between the toxin neutralization activity level and the level of antibodies to PA, LF and their domains was tested. The effect of age, gender and number of vaccinations on the level of adaptive post-vaccination immune response has been studied. It was shown that antibodies against PA-D1 circulate in the blood of donors for 1 year or more after immunization with live anthrax vaccine. Antibodies against all domains of LF and PA-D4 were detected in 11 months after vaccination. Antibodies against the spores were detected in 8 months after vaccination. A moderate positive correlation was found between the titers of antibodies to PA, LF, or their domains, and the TNA of the samples of blood serum from the donors.
Collapse
Affiliation(s)
- Victoria V. Firstova
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Anastasia S. Shakhova
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Alena K. Riabko
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
- * E-mail:
| | - Marina V. Silkina
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Natalia A. Zeninskaya
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Yana O. Romanenko
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Maksim A. Marin
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Methun M. Rogozin
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Alena S. Kartseva
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Ivan A. Dyatlov
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| | - Igor G. Shemyakin
- Laboratory of Molecular Biology, Federal Budget Institution of Science «State Research Center for Applied Microbiology and Biotechnology» of Federal Service of Consumer Right Surveillance & Human Welfare, Ministry of Health & Welfare, Obolensk, Moscow Region, Russian Federation
| |
Collapse
|
2
|
Zorigt T, Furuta Y, Simbotwe M, Ochi A, Tsujinouchi M, Shawa M, Shimizu T, Isoda N, Enkhtuya J, Higashi H. Development of ELISA based on Bacillus anthracis capsule biosynthesis protein CapA for naturally acquired antibodies against anthrax. PLoS One 2021; 16:e0258317. [PMID: 34634075 PMCID: PMC8504768 DOI: 10.1371/journal.pone.0258317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/23/2021] [Indexed: 11/30/2022] Open
Abstract
Anthrax is a zoonotic disease caused by the gram-positive spore-forming bacterium Bacillus anthracis. Detecting naturally acquired antibodies against anthrax sublethal exposure in animals is essential for anthrax surveillance and effective control measures. Serological assays based on protective antigen (PA) of B. anthracis are mainly used for anthrax surveillance and vaccine evaluation. Although the assay is reliable, it is challenging to distinguish the naturally acquired antibodies from vaccine-induced immunity in animals because PA is cross-reactive to both antibodies. Although additional data on the vaccination history of animals could bypass this problem, such data are not readily accessible in many cases. In this study, we established a new enzyme-linked immunosorbent assay (ELISA) specific to antibodies against capsule biosynthesis protein CapA antigen of B. anthracis, which is non-cross-reactive to vaccine-induced antibodies in horses. Using in silico analyses, we screened coding sequences encoded on pXO2 plasmid, which is absent in the veterinary vaccine strain Sterne 34F2 but present in virulent strains of B. anthracis. Among the 8 selected antigen candidates, capsule biosynthesis protein CapA (GBAA_RS28240) and peptide ABC transporter substrate-binding protein (GBAA_RS28340) were detected by antibodies in infected horse sera. Of these, CapA has not yet been identified as immunoreactive in other studies to the best of our knowledge. Considering the protein solubility and specificity of B. anthracis, we prepared the C-terminus region of CapA, named CapA322, and developed CapA322-ELISA based on a horse model. Comparative analysis of the CapA322-ELISA and PAD1-ELISA (ELISA uses domain one of the PA) showed that CapA322-ELISA could detect anti-CapA antibodies in sera from infected horses but was non-reactive to sera from vaccinated horses. The CapA322-ELISA could contribute to the anthrax surveillance in endemic areas, and two immunoreactive proteins identified in this study could be additives to the improvement of current or future vaccine development.
Collapse
Affiliation(s)
- Tuvshinzaya Zorigt
- Division of Infection and Immunity, International Institute for Zoonosis Control (Former Research Center for Zoonosis Control), Hokkaido University, Sapporo, Japan
- Graduate School of Infectious Diseases, School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshikazu Furuta
- Division of Infection and Immunity, International Institute for Zoonosis Control (Former Research Center for Zoonosis Control), Hokkaido University, Sapporo, Japan
- Graduate School of Infectious Diseases, School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Manyando Simbotwe
- Division of Infection and Immunity, International Institute for Zoonosis Control (Former Research Center for Zoonosis Control), Hokkaido University, Sapporo, Japan
| | - Akihiro Ochi
- Equine Research Institute, Japan Racing Association, Shimotsuke, Tochigi, Japan
| | - Mai Tsujinouchi
- Division of Infection and Immunity, International Institute for Zoonosis Control (Former Research Center for Zoonosis Control), Hokkaido University, Sapporo, Japan
| | - Misheck Shawa
- Division of Infection and Immunity, International Institute for Zoonosis Control (Former Research Center for Zoonosis Control), Hokkaido University, Sapporo, Japan
- Graduate School of Infectious Diseases, School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | - Tomoko Shimizu
- Division of Infection and Immunity, International Institute for Zoonosis Control (Former Research Center for Zoonosis Control), Hokkaido University, Sapporo, Japan
| | - Norikazu Isoda
- Laboratory of Microbiology, School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
| | | | - Hideaki Higashi
- Division of Infection and Immunity, International Institute for Zoonosis Control (Former Research Center for Zoonosis Control), Hokkaido University, Sapporo, Japan
- Graduate School of Infectious Diseases, School of Veterinary Medicine, Hokkaido University, Sapporo, Japan
- * E-mail:
| |
Collapse
|
3
|
de Oliveira FFM, Mamillapalli S, Gonti S, Brey RN, Li H, Schiffer J, Casadevall A, Bann JG. Binding of the von Willebrand Factor A Domain of Capillary Morphogenesis Protein 2 to Anthrax Protective Antigen Vaccine Reduces Immunogenicity in Mice. mSphere 2020; 5:e00556-19. [PMID: 31941807 PMCID: PMC6968648 DOI: 10.1128/msphere.00556-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 12/09/2019] [Indexed: 11/24/2022] Open
Abstract
Protective antigen (PA) is a component of anthrax toxin that can elicit toxin-neutralizing antibody responses. PA is also the major antigen in the current vaccine to prevent anthrax, but stability problems with recombinant proteins have complicated the development of new vaccines containing recombinant PA. The relationship between antigen physical stability and immunogenicity is poorly understood, but there are theoretical reasons to think that this parameter can affect immune responses. We investigated the immunogenicity of anthrax PA, in the presence and absence of the soluble von Willebrand factor A domain of the human form of receptor capillary morphogenesis protein 2 (sCMG2), to elicit antibodies to PA in BALB/c mice. Prior studies showed that sCMG2 stabilizes the 83-kDa PA structure to pH, chemical denaturants, temperature, and proteolysis and slows the hydrogen-deuterium exchange rate of histidine residues far from the binding interface. In contrast to a vaccine containing PA without adjuvant, we found that mice immunized with PA in stable complex with sCMG2 showed markedly reduced antibody responses to PA, including toxin-neutralizing antibodies and antibodies to domain 4, which correlated with fewer toxin-neutralizing antibodies. In contrast, mice immunized with PA in concert with a nonbinding mutant of sCMG2 (D50A) showed anti-PA antibody responses similar to those observed with PA alone. Our results suggest that addition of sCMG2 to a PA vaccine formulation is likely to result in a significantly diminished immune response, but we discuss the multitude of factors that could contribute to reduced immunogenicity.IMPORTANCE The anthrax toxin PA is the major immunogen in the current anthrax vaccine (anthrax vaccine adsorbed). Improving the anthrax vaccine for avoidance of a cold chain necessitates improvements in the thermodynamic stability of PA. We address how stabilizing PA using sCMG2 affects PA immunogenicity in BALB/c mice. Although the stability of PA is increased by binding to sCMG2, PA immunogenicity is decreased. This study emphasizes that, while binding of a ligand retains or improves conformational stability without affecting the native sequence, epitope recognition or processing may be affected, abrogating an effective immune response.
Collapse
Affiliation(s)
- Fabiana Freire Mendes de Oliveira
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA
| | | | - Srinivas Gonti
- Department of Chemistry, Wichita State University, Wichita, Kansas, USA
| | | | - Han Li
- Division of Bacterial Disease, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Jarad Schiffer
- Division of Bacterial Disease, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Arturo Casadevall
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA
| | - James G Bann
- Department of Chemistry, Wichita State University, Wichita, Kansas, USA
| |
Collapse
|
4
|
Autumn Smiley M, Sanford DC, Triplett CA, Callahan D, Frolov V, Look J, Ruiz C, Reece JJ, Miles A, Ruiz E, Ionin B, Shearer JD, Savransky V. Comparative immunogenicity and efficacy of thermostable (lyophilized) and liquid formulation of anthrax vaccine candidate AV7909. Vaccine 2019; 37:6356-6361. [PMID: 31530467 PMCID: PMC6764848 DOI: 10.1016/j.vaccine.2019.09.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/22/2019] [Accepted: 09/05/2019] [Indexed: 11/16/2022]
Abstract
The anthrax vaccine candidate AV7909 is being developed as a next-generation vaccine for a post-exposure prophylaxis (PEP) indication against anthrax. AV7909 consists of the anthrax vaccine adsorbed (AVA) (Emergent BioSolutions Inc., Lansing, MI) bulk drug substance adjuvanted with the immunostimulatory oligodeoxynucleotide (ODN) compound, CPG 7909. The addition of CPG 7909 to AVA enhances both the magnitude and the kinetics of antibody responses in animals and human subjects, making AV7909 a suitable next-generation vaccine for use in a PEP setting. Emergent has produced a thermostable (lyophilized) formulation of AV7909 vaccine utilizing drying technology. The purpose of the study described here was to assess the immunogenicity and efficacy of the lyophilized formulation of the AV7909 vaccine candidate as compared with the liquid formulation in the guinea pig general-use prophylaxis (GUP) model. The study also provides initial information on the relationship between the immune response induced by the thermostable formulation of the vaccine, as measured by the toxin neutralization assay (TNA), and animal survival following lethal anthrax aerosol challenge. Results demonstrated that there were no significant differences in the immunogenicity or efficacy of lyophilized AV7909 against lethal anthrax spore aerosol challenge in the guinea pig model as compared to liquid AV7909. For both vaccine formulations, logistic regression modeling showed that the probability of survival increased as the pre-challenge antibody levels increased.
Collapse
Affiliation(s)
- M Autumn Smiley
- Battelle Biomedical Research Center, 1425 Plain City Georgesville Road, JM7, West Jefferson, OH 46162, USA
| | - Daniel C Sanford
- Battelle Biomedical Research Center, 1425 Plain City Georgesville Road, JM7, West Jefferson, OH 46162, USA
| | - Cheryl A Triplett
- Battelle Biomedical Research Center, 1425 Plain City Georgesville Road, JM7, West Jefferson, OH 46162, USA
| | - Daniel Callahan
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Vladimir Frolov
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Jee Look
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Christian Ruiz
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Joshua J Reece
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Aaron Miles
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Ericka Ruiz
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Boris Ionin
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Jeffry D Shearer
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA
| | - Vladimir Savransky
- Emergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA.
| |
Collapse
|
5
|
Żakowska D, Graniak G, Rutyna P, Naylor K, Głowacka P, Niemcewicz M. Protective antigen domain 4 of Bacillus anthracis as a candidate for use as vaccine for anthrax. Ann Agric Environ Med 2019; 26:392-395. [PMID: 31559791 DOI: 10.26444/aaem/99669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Existing research for using the protective antigen (PA) of Bacillus anthracis as a vaccine component shows that protection against anthrax may be obtained using fragments of this protein. The aim of the research is to check whether the selected protein fragment of the protective antigen (domain 4) encoded by an appropriate nucleotide sequence of gene pag of B. anthracis, was expressed in the bacterial system of E. coli. In order to examine the selected sequence of the pag gene, a PCR reaction and a highly effective TOPO cloning strategy were used, followed by purification of the recombinant proteins and their detection by a western-blot method. In the planning of the PA4 antigen expression a higher level of effectiveness in production of small protein - domain 4 - was anticipated. As a result, the 139 amino acids protein fragment of B. anthracis PA (domain 4) was isolated. The research may have found the basis for in vivo research aimed at finding potential anthrax vaccine components.
Collapse
Affiliation(s)
- Dorota Żakowska
- Biological Threats Identification and Countermeasure Center of the General Karol Kaczkowski Military Institute of Hygiene and Epidemiology, Puławy, Poland
| | - Grzegorz Graniak
- Biological Threats Identification and Countermeasure Center of the General Karol Kaczkowski Military Institute of Hygiene and Epidemiology, Puławy, Poland
| | - Paweł Rutyna
- Biological Threats Identification and Countermeasure Center of the General Karol Kaczkowski Military Institute of Hygiene and Epidemiology, Puławy, Poland
| | - Katarzyna Naylor
- Department of Didactics and Medical Simulation, Medical University, Lublin, Poland
| | - Patrycja Głowacka
- Biological Threats Identification and Countermeasure Center of the General Karol Kaczkowski Military Institute of Hygiene and Epidemiology, Puławy, Poland
| | - Marcin Niemcewicz
- Biological Threats Identification and Countermeasure Center of the General Karol Kaczkowski Military Institute of Hygiene and Epidemiology, Puławy, Poland
| |
Collapse
|
6
|
Aggarwal S, Somani VK, Gupta S, Garg R, Bhatnagar R. Development of a novel multiepitope chimeric vaccine against anthrax. Med Microbiol Immunol 2019; 208:185-195. [PMID: 30671633 DOI: 10.1007/s00430-019-00577-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 01/03/2019] [Indexed: 02/03/2023]
Abstract
Bacillus anthracis (BA), the etiological agent of anthrax, secretes protective antigen (PA), lethal factor (LF), and edema factor (EF) as major virulence mediators. Amongst these, PA-based vaccines are most effective for providing immunity against BA, but their low shelf life limits their usage. Previous studies showed that B-cell epitopes, ID II and ID III present in PA domain IV possess higher toxin neutralization activity and elicit higher antibody titer than ID I. Moreover, N-terminal region of both LF and EF harbors PA-binding sites which share 100% identity with each other. Here, in this study, we have developed an epitope-based chimeric vaccine (ID-LFn) comprising ID II-ID III region of PA and N-terminal region of LF. We have also evaluated its protective efficacy as well as stability and found it to be more stable than PA-based vaccine. Binding reactivities of ID-LFn with anti-PA/LF/EF antibodies were determined by ELISA. The stability of chimeric vaccine was assessed using circular dichroism spectroscopy. ID-LFn response was characterized by toxin neutralization, lymphocyte proliferation isotyping and cytokine profiling. The protective efficacy was analyzed by challenging ID-LFn-immunized mice with B. anthracis (pXO1+ and pXO2+). ID-LFn was found to be significantly stable as compared to PA. Anti-ID-LFn antibodies recognized PA, LF as well as EF. The T-cell response and the protective efficacy of ID-LFn were found to be almost similar to PA. ID-LFn exhibits equal protective efficacy in mice and possesses more stability as compared to PA along with the capability of recognizing PA, LF and EF at the same time. Thus, it can be considered as an improved vaccine against anthrax with better shelf life. ID-LFn, a novel multiepitope chimeric anthrax vaccine: ID-LFn comprises of immunodominant epitopes of domain 4 of PA and N-terminal homologous stretch of LF and EF. The administration of this protein as a vaccine provides protection against anthrax.
Collapse
Affiliation(s)
- Somya Aggarwal
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India
- Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, 63110, MO, USA
| | - Vikas Kumar Somani
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India
- Department of Oncology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Sonal Gupta
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Rajni Garg
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India
- Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru, Karnataka, 560064, India
| | - Rakesh Bhatnagar
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India.
- Banaras Hindu University, Banaras, Uttar Pradesh, 221005, India.
| |
Collapse
|
7
|
Weir GM, Karkada M, Hoskin D, Stanford MM, MacDonald L, Mansour M, Liwski RS. Combination of poly I:C and Pam3CSK4 enhances activation of B cells in vitro and boosts antibody responses to protein vaccines in vivo. PLoS One 2017; 12:e0180073. [PMID: 28662082 PMCID: PMC5491120 DOI: 10.1371/journal.pone.0180073] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 06/11/2017] [Indexed: 12/13/2022] Open
Abstract
Vaccines that can rapidly induce strong and robust antibody-mediated immunity could improve protection from certain infectious diseases for which current vaccine formulations are inefficient. For indications such as anthrax and influenza, antibody production in vivo is a correlate of efficacy. Toll-like receptor (TLR) agonists are frequently studied for their role as vaccine adjuvants, largely because of their ability to enhance initiation of immune responses to antigens by activating dendritic cells. However, TLRs are also expressed on B cells and may contribute to effective B cell activation and promote differentiation into antigen-specific antibody producing plasma cells in vivo. We sought to discover an adjuvant system that could be used to augment antibody responses to influenza and anthrax vaccines. We first characterized an adjuvant system in vitro which consisted of two TLR ligands, poly I:C (TLR3) and Pam3CSK4 (TLR2), by evaluating its effects on B cell activation. Each agonist enhanced B cell activation through increased expression of surface receptors, cytokine secretion and proliferation. However, when B cells were stimulated with poly I:C and Pam3CSK4 in combination, further enhancement to cell activation was observed. Using B cells isolated from knockout mice we confirmed that poly I:C and Pam3CSK4 were signaling through TLR3 and TLR2, respectively. B cells activated with Poly I:C and Pam3CSK4 displayed enhanced capacity to stimulate allogeneic CD4+ T cell activation and differentiate into antibody-producing plasma cells in vitro. Mice vaccinated with influenza or anthrax antigens formulated with poly I:C and Pam3CSK4 in DepoVax™ vaccine platform developed a rapid and strong antigen-specific serum antibody titer that persisted for at least 12 weeks after a single immunization. These results demonstrate that combinations of TLR adjuvants promote more effective B cell activation in vitro and can be used to augment antibody responses to vaccines in vivo.
Collapse
Affiliation(s)
- Genevieve M. Weir
- Research & Development, Immunovaccine Inc, Halifax, Nova Scotia, Canada
- Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
- * E-mail:
| | - Mohan Karkada
- Research & Development, Immunovaccine Inc, Halifax, Nova Scotia, Canada
- Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - David Hoskin
- Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Marianne M. Stanford
- Research & Development, Immunovaccine Inc, Halifax, Nova Scotia, Canada
- Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Lisa MacDonald
- Research & Development, Immunovaccine Inc, Halifax, Nova Scotia, Canada
| | - Marc Mansour
- Research & Development, Immunovaccine Inc, Halifax, Nova Scotia, Canada
| | - Robert S. Liwski
- Department of Microbiology & Immunology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Pathology and Laboratory Medicine, Division of Hematopathology, Queen Elizabeth II Health Sciences Centre, Halifax, Nova Scotia, Canada
| |
Collapse
|
8
|
Martin TL, Jee J, Kim E, Steiner HE, Cormet-Boyaka E, Boyaka PN. Sublingual targeting of STING with 3'3'-cGAMP promotes systemic and mucosal immunity against anthrax toxins. Vaccine 2017; 35:2511-2519. [PMID: 28343781 DOI: 10.1016/j.vaccine.2017.02.064] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 02/06/2017] [Accepted: 02/28/2017] [Indexed: 12/21/2022]
Abstract
Anthrax is caused by Bacillus anthracis, a zoonotic bacterial pathogen affecting humans and livestock worldwide. The current human anthrax vaccine, anthrax vaccine adsorbed (AVA), is an injected vaccine with a cumbersome administration schedule and fails to promote mucosal immunity. Bacterial enterotoxins, which stimulate production of the cyclic nucleotide cAMP are effective experimental mucosal vaccine adjuvants, but their inherent toxicity has precluded their use in humans. We investigated whether cyclic dinucleotides that target Stimulator of Interferon Gamma Genes (STING) in mammalian cells could represent an alternative to bacterial enterotoxins as adjuvant for sublingual immunization and promotion of mucosal immunity and secretory IgA responses in addition to systemic immunity. We found that sublingual immunization of mice with Bacillus anthracis protective antigen (PA) and the STING ligand 3'3'-cGAMP promotes PA-specific serum IgG Ab responses of the same magnitude as those induced after immunization with PA and the experimental adjuvant cholera toxin (CT). Interestingly, this STING ligand also promoted serum anti-PA IgA and IgA-producing cells in the bone marrow. Furthermore, the saliva of mice immunized with the STING ligand exhibited similar levels of PA-specific IgA Abs as groups immunized with CT as adjuvant. The adjuvant activity of 3'3'-cGAMP was associated with mixed Th1, Th2, and Th17 responses. This STING ligand also induced rapid IFN-β and IL-10 responses in sublingual tissues and cervical lymph nodes, and TGF-β responses in the cervical lymph nodes, which could contribute to promoting IgA responses after sublingual immunization.
Collapse
Affiliation(s)
- Tara L Martin
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Junbae Jee
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Eunsoo Kim
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Haley E Steiner
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Estelle Cormet-Boyaka
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States
| | - Prosper N Boyaka
- Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States.
| |
Collapse
|
9
|
Mamedov T, Chichester JA, Jones RM, Ghosh A, Coffin MV, Herschbach K, Prokhnevsky AI, Streatfield SJ, Yusibov V. Production of Functionally Active and Immunogenic Non-Glycosylated Protective Antigen from Bacillus anthracis in Nicotiana benthamiana by Co-Expression with Peptide-N-Glycosidase F (PNGase F) of Flavobacterium meningosepticum. PLoS One 2016; 11:e0153956. [PMID: 27101370 PMCID: PMC4839623 DOI: 10.1371/journal.pone.0153956] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 04/06/2016] [Indexed: 11/20/2022] Open
Abstract
Bacillus anthracis has long been considered a potential biological warfare agent, and therefore, there is a need for a safe, low-cost and highly efficient anthrax vaccine with demonstrated long-term stability for mass vaccination in case of an emergency. Many efforts have been made towards developing an anthrax vaccine based on recombinant protective antigen (rPA) of B. anthracis, a key component of the anthrax toxin, produced using different expression systems. Plants represent a promising recombinant protein production platform due to their relatively low cost, rapid scalability and favorable safety profile. Previous studies have shown that full-length rPA produced in Nicotiana benthamiana (pp-PA83) is immunogenic and can provide full protection against lethal spore challenge; however, further improvement in the potency and stability of the vaccine candidate is necessary. PA of B. anthracis is not a glycoprotein in its native host; however, this protein contains potential N-linked glycosylation sites, which can be aberrantly glycosylated during expression in eukaryotic systems including plants. This glycosylation could affect the availability of certain key epitopes either due to masking or misfolding of the protein. Therefore, a non-glycosylated form of pp-PA83 was engineered and produced in N. benthamiana using an in vivo deglycosylation approach based on co-expression of peptide-N-glycosidase F (PNGase F) from Flavobacterium meningosepticum. For comparison, versions of pp-PA83 containing point mutations in six potential N-glycosylation sites were also engineered and expressed in N. benthamiana. The in vivo deglycosylated pp-PA83 (pp-dPA83) was shown to have in vitro activity, in contrast to glycosylated pp-PA83, and to induce significantly higher levels of toxin-neutralizing antibody responses in mice compared with glycosylated pp-PA83, in vitro deglycosylated pp-PA83 or the mutated versions of pp-PA83. These results suggest that pp-dPA83 may offer advantages in terms of dose sparing and enhanced immunogenicity as a promising candidate for a safe, effective and low-cost subunit vaccine against anthrax.
Collapse
Affiliation(s)
- Tarlan Mamedov
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - Jessica A. Chichester
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - R. Mark Jones
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - Ananya Ghosh
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - Megan V. Coffin
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - Kristina Herschbach
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - Alexey I. Prokhnevsky
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - Stephen J. Streatfield
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| | - Vidadi Yusibov
- Fraunhofer USA Center for Molecular Biotechnology, Newark, Delaware, United States of America
| |
Collapse
|
10
|
Laws TR, Kuchuloria T, Chitadze N, Little SF, Webster WM, Debes AK, Saginadze S, Tsertsvadze N, Chubinidze M, Rivard RG, Tsanava S, Dyson EH, Simpson AJH, Hepburn MJ, Trapaidze N. A Comparison of the Adaptive Immune Response between Recovered Anthrax Patients and Individuals Receiving Three Different Anthrax Vaccines. PLoS One 2016; 11:e0148713. [PMID: 27007118 PMCID: PMC4805272 DOI: 10.1371/journal.pone.0148713] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 01/20/2016] [Indexed: 11/18/2022] Open
Abstract
Several different human vaccines are available to protect against anthrax. We compared the human adaptive immune responses generated by three different anthrax vaccines or by previous exposure to cutaneous anthrax. Adaptive immunity was measured by ELISPOT to count cells that produce interferon (IFN)-γ in response to restimulation ex vivo with the anthrax toxin components PA, LF and EF and by measuring circulating IgG specific to these antigens. Neutralising activity of antisera against anthrax toxin was also assayed. We found that the different exposures to anthrax antigens promoted varying immune responses. Cutaneous anthrax promoted strong IFN-γ responses to all three antigens and antibody responses to PA and LF. The American AVA and Russian LAAV vaccines induced antibody responses to PA only. The British AVP vaccine produced IFN-γ responses to EF and antibody responses to all three antigens. Anti-PA (in AVA and LAAV vaccinees) or anti-LF (in AVP vaccinees) antibody titres correlated with toxin neutralisation activities. Our study is the first to compare all three vaccines in humans and show the diversity of responses against anthrax antigens.
Collapse
Affiliation(s)
- Thomas R. Laws
- Defence Science and Technology Laboratory, DSTL Porton Down, Salisbury, United Kingdom
- * E-mail:
| | - Tinatin Kuchuloria
- Department of Public Health, Tbilisi State University, Tbilisi, Georgia
- Clinical Research Unit (CRU), Technology Management Company (TMC), Tbilisi, Georgia
| | - Nazibriola Chitadze
- National Center for Disease Control and Public Health (NCDC), Tbilisi, Georgia
| | - Stephen F. Little
- U. S. Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, MD, United States of America
| | - Wendy M. Webster
- U. S. Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, MD, United States of America
| | - Amanda K. Debes
- U. S. Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, MD, United States of America
| | - Salome Saginadze
- National Center for Disease Control and Public Health (NCDC), Tbilisi, Georgia
| | - Nikoloz Tsertsvadze
- National Center for Disease Control and Public Health (NCDC), Tbilisi, Georgia
| | - Mariam Chubinidze
- National Center for Disease Control and Public Health (NCDC), Tbilisi, Georgia
| | - Robert G. Rivard
- U. S. Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, MD, United States of America
| | - Shota Tsanava
- Department of Public Health, Tbilisi State University, Tbilisi, Georgia
- National Center for Disease Control and Public Health (NCDC), Tbilisi, Georgia
| | - Edward H. Dyson
- Defence Science and Technology Laboratory, DSTL Porton Down, Salisbury, United Kingdom
| | - Andrew J. H. Simpson
- Defence Science and Technology Laboratory, DSTL Porton Down, Salisbury, United Kingdom
| | - Matthew J. Hepburn
- U. S. Army Medical Research Institute of Infectious Diseases (USAMRIID), Fort Detrick, MD, United States of America
| | - Nino Trapaidze
- Clinical Research Unit (CRU), Technology Management Company (TMC), Tbilisi, Georgia
- National Center for Disease Control and Public Health (NCDC), Tbilisi, Georgia
| |
Collapse
|
11
|
Popova PY, Mikshis NI. [PERSPECTIVES OF DEVELOPMENT OF LIVE RECOMBINANT ANTHRAX VACCINES BASED ON OPPORTUNISTIC AND APATHOGENIC MICROORGANISMS]. Zh Mikrobiol Epidemiol Immunobiol 2016:79-89. [PMID: 27029122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Live genetic engineering anthrax vaccines on the platform of avirulent and probiotic micro-organisms are a safe and adequate alternative to preparations based on attenuated Bacillus anthracis strains. Mucosal application results in a direct contact of the vaccine preparations with mucous membranes in those organs arid tissues of the macro-organisms, that are exposed to the pathogen in the first place, resulting in a development of local and systemic immune response. Live recombinant anthrax vaccines could be used both separately as well as in a prime-boost immunization scheme. The review focuses on immunogenic and protective properties of experimental live genetic engineering prearations, created based on members of geni of Salmonella, Lactobacillus and adenoviruses.
Collapse
|
12
|
McComb RC, Martchenko M. Neutralizing antibody and functional mapping of Bacillus anthracis protective antigen-The first step toward a rationally designed anthrax vaccine. Vaccine 2015; 34:13-9. [PMID: 26611201 DOI: 10.1016/j.vaccine.2015.11.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 10/05/2015] [Accepted: 11/09/2015] [Indexed: 12/14/2022]
Abstract
Anthrax is defined by the Centers for Disease Control and Prevention as a Category A pathogen for its potential use as a bioweapon. Current prevention treatments include Anthrax Vaccine Adsorbed (AVA). AVA is an undefined formulation of Bacillus anthracis culture supernatant adsorbed to aluminum hydroxide. It has an onerous vaccination schedule, is slow and cumbersome to produce and is slightly reactogenic. Next-generation vaccines are focused on producing recombinant forms of anthrax toxin in a well-defined formulation but these vaccines have been shown to lose potency as they are stored. In addition, studies have shown that a proportion of the antibody response against these vaccines is focused on non-functional, non-neutralizing regions of the anthrax toxin while some essential functional regions are shielded from eliciting an antibody response. Rational vaccinology is a developing field that focuses on designing vaccine antigens based on structural information provided by neutralizing antibody epitope mapping, crystal structure analysis, and functional mapping through amino acid mutations. This information provides an opportunity to design antigens that target only functionally important and conserved regions of a pathogen in order to make a more optimal vaccine product. This review provides an overview of the literature related to functional and neutralizing antibody epitope mapping of the Protective Antigen (PA) component of anthrax toxin.
Collapse
Affiliation(s)
- Ryan C McComb
- Keck Graduate Institute, School of Applied Life Science, 535 Watson Dr., Claremont, CA, United States
| | - Mikhail Martchenko
- Keck Graduate Institute, School of Applied Life Science, 535 Watson Dr., Claremont, CA, United States.
| |
Collapse
|
13
|
Devera TS, Prusator DK, Joshi SK, Ballard JD, Lang ML. Immunization of Mice with Anthrax Protective Antigen Limits Cardiotoxicity but Not Hepatotoxicity Following Lethal Toxin Challenge. Toxins (Basel) 2015; 7:2371-84. [PMID: 26120785 PMCID: PMC4516918 DOI: 10.3390/toxins7072371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 06/15/2015] [Accepted: 06/18/2015] [Indexed: 11/16/2022] Open
Abstract
Protective immunity against anthrax is inferred from measurement of vaccine antigen-specific neutralizing antibody titers in serum samples. In animal models, in vivo challenges with toxin and/or spores can also be performed. However, neither of these approaches considers toxin-induced damage to specific organ systems. It is therefore important to determine to what extent anthrax vaccines and existing or candidate adjuvants can provide organ-specific protection against intoxication. We therefore compared the ability of Alum, CpG DNA and the CD1d ligand α-galactosylceramide (αGC) to enhance protective antigen-specific antibody titers, to protect mice against challenge with lethal toxin, and to block cardiotoxicity and hepatotoxicity. By measurement of serum cardiac Troponin I (cTnI), and hepatic alanine aminotransferase (ALT), and aspartate aminotransferase (AST), it was apparent that neither vaccine modality prevented hepatic intoxication, despite high Ab titers and ultimate survival of the subject. In contrast, cardiotoxicity was greatly diminished by prior immunization. This shows that a vaccine that confers survival following toxin exposure may still have an associated morbidity. We propose that organ-specific intoxication should be monitored routinely during research into new vaccine modalities.
Collapse
Affiliation(s)
- T Scott Devera
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| | - Dawn K Prusator
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
- Oklahoma Center for Neuroscience, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| | - Sunil K Joshi
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
- Frank Reidy Research Center for Bioelectrics, Old Dominion University, Norfolk, VA 23508, USA.
| | - Jimmy D Ballard
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| | - Mark L Lang
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
| |
Collapse
|
14
|
Köhler SM, Baillie LW, Beyer W. BclA and toxin antigens augment each other to protect NMRI mice from lethal Bacillus anthracis challenge. Vaccine 2015; 33:2771-7. [PMID: 25917676 DOI: 10.1016/j.vaccine.2015.04.049] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 03/16/2015] [Accepted: 04/13/2015] [Indexed: 11/17/2022]
Abstract
While proving highly effective in controlling Anthrax in farm animals all over the world currently attenuated live anthrax vaccines employed in a veterinary context suffer from drawbacks such as residual virulence, short term protection, variation in quality and, most importantly, lack of efficacy if administered simultaneously with antibiotics. These limitations have stimulated the development of non-living component vaccines which induce a broad spectrum immune response capable of targeting both toxaemia (as in the case of PA based vaccines) and bacteraemia. To contribute to this several new approaches were tested in outbred NMRI mice for antibody titres and protectiveness. Plasmids encoding a recombinant toxin derived fusion peptide and a spore surface derived peptide were tested as DNA-vaccines in comparison to their protein counterparts utilising two adjuvant approaches and two DNA-vector backbones. The combination of two plasmids encoding LFD1PAD4-mIPS1 and TPA-BclAD1D3-LAMP1, when delivered by GeneGun, protected 90% of the animals against a lethal challenge with 25LD50 spores of the Ames strain of Bacillus anthracis. Single applications of either antigen component showed significantly lower protection rates, indicating the beneficial interaction between anti-spore and anti-toxin components for an acellular vaccine formulation.
Collapse
MESH Headings
- Adjuvants, Immunologic
- Animals
- Animals, Outbred Strains
- Anthrax/prevention & control
- Anthrax Vaccines/administration & dosage
- Anthrax Vaccines/immunology
- Antibodies, Bacterial/immunology
- Antigens, Bacterial/immunology
- Bacillus anthracis/immunology
- Biolistics
- Disease Models, Animal
- Female
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/immunology
- Mice
- Spores, Bacterial/immunology
- Toxins, Biological/genetics
- Toxins, Biological/immunology
- Vaccines, Acellular/immunology
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/immunology
Collapse
Affiliation(s)
- Susanne M Köhler
- Institute of Environmental and Animal Hygiene, University of Hohenheim, Garbenstr. 30, D-70599 Stuttgart, Germany.
| | - Les W Baillie
- Cardiff School of Pharmacy and Pharmaceutical Science, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, UK
| | - Wolfgang Beyer
- Institute of Environmental and Animal Hygiene, University of Hohenheim, Garbenstr. 30, D-70599 Stuttgart, Germany
| |
Collapse
|
15
|
Wobeser BK. Anthrax vaccine associated deaths in miniature horses. Can Vet J 2015; 56:359-360. [PMID: 25829553 PMCID: PMC4357906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
During a widespread anthrax outbreak in Canada, miniature horses were vaccinated using a live spore anthrax vaccine. Several of these horses died from an apparent immune-mediated vasculitis temporally associated with this vaccination. During the course of the outbreak, other miniature horses from different regions with a similar vaccination history, clinical signs, and necropsy findings were found.
Collapse
|
16
|
Vance DJ, Rong Y, Brey RN, Mantis NJ. Combination of two candidate subunit vaccine antigens elicits protective immunity to ricin and anthrax toxin in mice. Vaccine 2015; 33:417-21. [PMID: 25475957 PMCID: PMC4274239 DOI: 10.1016/j.vaccine.2014.11.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Revised: 09/30/2014] [Accepted: 11/17/2014] [Indexed: 10/24/2022]
Abstract
In an effort to develop combination vaccines for biodefense, we evaluated a ricin subunit antigen, RiVax, given in conjunction with an anthrax protective antigen, DNI. The combination led to high endpoint titer antibody response, neutralizing antibodies, and protective immunity against ricin and anthrax lethal toxin. This is a natural combination vaccine, since both antigens are recombinant subunit proteins that would be given to the same target population.
Collapse
Affiliation(s)
- David J Vance
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | - Yinghui Rong
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY, USA
| | | | - Nicholas J Mantis
- Division of Infectious Disease, Wadsworth Center, New York State Department of Health, Albany, NY, USA; Department of Biomedical Sciences, University at Albany, Albany, NY, USA.
| |
Collapse
|
17
|
Rijpkema SG, Adams T, Rigsby P, Xing DK, Corbel MJ. Investigation in a Model System of the Effects of Combinations of Anthrax and Pertussis Vaccines Administered to Service Personnel in the 1991Gulf War. Human Vaccines 2014; 1:165-9. [PMID: 17012879 DOI: 10.4161/hv.1.4.1989] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The toxicity and immunogenicity of the anthrax and pertussis vaccine combinations used in the 1991 Gulf War was assessed in NIH, A/J and Balb/c mice. Inoculation of pertussis vaccines, vaccine combinations, or aluminium salt caused illness, splenomegaly and significant weight loss. Although some animals recovered eventually, a lethal form of ascites developed in some NIH mice and body weights of A/J and Balb/c mice remained below normal levels. Inoculation of anthrax vaccine produced little effect. Exposure to diluted vaccine combinations produced less serious side effects of shorter duration. Single vaccinations induced specific IgG1 antibodies whereas a mixture of IgG1 and IgG2a was produced after multiple injections. Antigen stimulation of spleen cells from mice exposed to pertussis vaccines induced high levels of NO and IL-6, whereas stimulated spleen cells from mice exposed to anthrax vaccine produced only low levels of IL-6. In mice, pertussis vaccines act as an adjuvant for anthrax vaccine, but these vaccines are also the major cause of toxicity of the vaccine combination. The relatively high vaccine dose used, together with the low sensitivity of mice to anthrax toxin, emphasises that caution should be exercised in applying these results to human recipients of these vaccines.
Collapse
Affiliation(s)
- Sjoerd G Rijpkema
- Division of Bacteriology, National Institute for Biological Standards and Control, Blanche Lane, South Mimms, Potters Bar, UK
| | | | | | | | | |
Collapse
|
18
|
Huang J, Mikszta JA, Ferriter MS, Jiang G, Harvey NG, Dyas B, Roy CJ, Ulrich RG, Sullivan VJ. Intranasal Administration of Dry Powder Anthrax Vaccine Provides Protection Against Lethal Aerosol Spore Challenge. Human Vaccines 2014; 3:90-3. [PMID: 17375001 DOI: 10.4161/hv.3.3.4011] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The use of an aerosolizable form of anthrax as a biological weapon is considered to be among the most serious bioterror threats. Intranasal (IN) delivery of a dry powder anthrax vaccine could provide an effective and non-invasive administration alternative to traditional intramuscular (IM) or subcutaneous (SC) injection. We evaluated a dry powder vaccine based on the recombinant Protective Antigen (rPA) of Bacillus anthracis for vaccination against anthrax via IN immunization in a rabbit model. rPA powders were formulated and administered IN using a prototype powder delivery device. We compared serum IgG and toxin neutralizing antibody (TNA) titers of rabbits immunized IN with 10 microg rPA of a powder formulation with those immunized with the same dose of liquid rPA vaccine, delivered either IN or by IM injection. In addition, each group was tested for survival after aerosol spore challenge. Our results showed that IN vaccination with rPA powders elicited serum PA-specific IgG and TNA titers that were equivalent to those raised by liquid rPA administered IN. Serum PA-specific IgG and TNA titers after IN delivery were lower than for IM injection, however, after aerosol spore challenge, rabbits immunized IN with powders displayed 100% protection versus 63% for the group immunized IN with the liquid vaccine and 86% for the group immunized by IM injection. The results suggest that an IN powder vaccine based on rPA is at least as protective as a liquid delivered by IM injection.
Collapse
Affiliation(s)
- Joanne Huang
- BD Technologies, Research Triangle Park, North Carolina 27709, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Mikshis NI, Popova PI, Kudriavtseva OM, Semakova AP, Novikova LN, Kravtsov AL, Bugorkova SA, Shchukovskaia TN, Popov IA, Kutyrev VV. [Immunogenicity and safety of a prototype chemical anthrax vaccine in laboratory animal models]. Zh Mikrobiol Epidemiol Immunobiol 2014:22-30. [PMID: 25286524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM Evaluation of immune stimulating and toxic effects of a vaccine prototype protein components. MATERIALS AND METHODS Linear mice, guinea pigs and rabbits were immunized subcutaneously once or twice by recombinant protective antigen (rPA), S-layer protein (EA1) or their complex. Innate immunity structure activation was registered by changes in Toll-like receptor (TLR) expression. Adaptive immune response parameters were determined by established methods. Toxicity of the preparations was determined using flow cytofluorometry and densitomorphometry. RESULTS The ability of rPA and EA1 to activate structures of innate immunity - TLR 2 and 6 - was established. Features of anti-PA antibody titer dynamics for each of the animal species was determined, a comparison with antibody formation during immunization with Bacillus anthracis STI- 1 was carried out. 2 immunizations ofbiomodels with a complex preparation combined with an adjuvant provides protection from infection by a test-strain that is comparable with protectivity of a live vaccine. Evidences regarding damaging effect of rPA and EAI on cells and tissues of macro organism were not detected throughout the study. CONCLUSION Aprototype of a chemical anthrax vaccine under development has high immunogenicity and its protein components are not toxic for laboratory animals based on the results of complex testing.
Collapse
|
20
|
Gorantala J, Grover S, Rahi A, Chaudhary P, Rajwanshi R, Sarin NB, Bhatnagar R. Generation of protective immune response against anthrax by oral immunization with protective antigen plant-based vaccine. J Biotechnol 2014; 176:1-10. [PMID: 24548460 DOI: 10.1016/j.jbiotec.2014.01.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/30/2013] [Accepted: 01/29/2014] [Indexed: 01/04/2023]
Abstract
In concern with frequent recurrence of anthrax in endemic areas and inadvertent use of its spores as biological weapon, the development of an effective anthrax vaccine suitable for both human and veterinary needs is highly desirable. A simple oral delivery through expression in plant system could offer promising alternative to the current methods that rely on injectable vaccines extracted from bacterial sources. In the present study, we have expressed protective antigen (PA) gene in Indian mustard by Agrobacterium-mediated transformation and in tobacco by plastid transformation. Putative transgenic lines were verified for the presence of transgene and its expression by molecular analysis. PA expressed in transgenic lines was biologically active as evidenced by macrophage lysis assay. Intraperitoneal (i.p.) and oral immunization with plant PA in murine model indicated high serum PA specific IgG and IgA antibody titers. PA specific mucosal immune response was noted in orally immunized groups. Further, antibodies indicated lethal toxin neutralizing potential in-vitro and conferred protection against in-vivo toxin challenge. Oral immunization experiments demonstrated generation of immunoprotective response in mice. Thus, our study examines the feasibility of oral PA vaccine expressed in an edible plant system against anthrax.
Collapse
Affiliation(s)
- Jyotsna Gorantala
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Sonam Grover
- Molecular Technology Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Amit Rahi
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Prerna Chaudhary
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Ravi Rajwanshi
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Neera Bhalla Sarin
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Rakesh Bhatnagar
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India.
| |
Collapse
|
21
|
Abstract
The terrorist attacks of 2001 involving anthrax underscore the imperative that safe and effective medical countermeasures should be readily available. Vaccination appears to be the most effective form of mass protection against a biological attack, but the current vaccines have drawbacks that justify the enormous amount of effort currently being put into developing more effective vaccines and other treatment modalities. After providing a comprehensive overview of the organism Bacillus anthracis as a biological weapon and its pathogenicity, this review briefly summarizes the current knowledge vital to the management of anthrax disease. This knowledge has been acquired since 2001 as a result of the progress on anthrax research and focuses on the possible development of improved human anti-infective strategies targeting B. anthracis spore components, as well as strategies based on host-pathogen interactions.
Collapse
Affiliation(s)
- Dimitrios G Bouzianas
- Department of Medical Laboratories, Faculty of Health and Care Professions, University-level Technological Educational Institute of Thessaloniki, Greece.
| |
Collapse
|
22
|
Ndumnego OC, Crafford J, Beyer W, van Heerden H. Quantitative anti-PA IgG ELISA; assessment and comparability with the anthrax toxin neutralization assay in goats. BMC Vet Res 2013; 9:265. [PMID: 24373579 PMCID: PMC3892015 DOI: 10.1186/1746-6148-9-265] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 12/20/2013] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Presently, few data exist on the level and duration of anti-protective antigen (PA) IgG in vaccinated livestock. Various adaptation of enzyme-linked immunosorbent assays (ELISAs) have been developed in studies to assess immune response following vaccination, albeit mostly in laboratory rodent models. The quantitative anti-anthrax IgG ELISA in this study describes a method of enumerating the concentration of anti-PA specific IgG present in sera of immunized goats, with the aid of an affinity-purified caprine polyclonal anti-anthrax PA-83 IgG standard. This was compared with the anthrax toxin neutralization assay (TNA) which measures a functional subset of toxin neutralizing anti-PA IgG. RESULTS The measured concentrations obtained in the standard curve correlated with the known concentration at each dilution. Percentage recovery of the standard concentrations ranged from 89 to 98% (lower and upper asymptote respectively). Mean correlation coefficient (r2) of the standard curve was 0.998. Evaluation of the intra-assay coefficient of variation showed ranges of 0.23-16.90% and 0.40-12.46% for days 28 and 140 sera samples respectively, following vaccination. The mean inter-assay coefficient of variation for triplicate samples repeated on 5 different days was 18.53 and 12.17% for days 28 and 140 sera samples respectively. Spearman's rank correlation of log-transformed IgG concentrations and TNA titres showed strong positive correlation (rs = 0.942; p = 0.01). CONCLUSION This study provides evidence that an indirect ELISA can be used for the quantification of anti-anthrax PA IgG in goats with the added advantage of using single dilutions to save time and resources. The use of such related immunoassays can serve as potential adjuncts to potency tests for Sterne and other vaccine types under development in ruminant species. This is the first report on the correlation of polyclonal anti-anthrax PA83 antibody with the TNA in goats.
Collapse
Affiliation(s)
- Okechukwu C Ndumnego
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort 0110, South Africa
| | - Jannie Crafford
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort 0110, South Africa
| | - Wolfgang Beyer
- Institute of Environmental and Animal Hygiene, University of Hohenheim, Stuttgart, Germany
| | - Henriette van Heerden
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort 0110, South Africa
| |
Collapse
|
23
|
Mamedov T, Yusibov V. In vivo deglycosylation of recombinant proteins in plants by co-expression with bacterial PNGase F. Bioengineered 2013; 4:338-42. [PMID: 23328084 PMCID: PMC3813534 DOI: 10.4161/bioe.23449] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 12/25/2012] [Accepted: 12/30/2012] [Indexed: 11/19/2022] Open
Abstract
At present, several eukaryotic expression systems including yeast, insect and mammalian cells and plants are used for the production of recombinant proteins. Proteins with potential N-glycosylation sites are efficiently glycosylated when expressed in these systems. However, the ability of the eukaryotic expression systems to glycosylate may be not desirable for some proteins. If target proteins that do not carry N-linked glycans in the native host contain potential N-linked glycosylation sites, they can be aberrantly glycosylated in the eukaryotic expression systems, thus, potentially impairing biological activity. Recently, we have developed a strategy of enzymatic deglycosylation of proteins in vivo by co-introducing bacterial PNGase F via agroinfiltration followed by transient expression in plants. (1) Here, we summarize our work on this topic and its potential implications.
Collapse
Affiliation(s)
- Tarlan Mamedov
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| | - Vidadi Yusibov
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| |
Collapse
|
24
|
Ovsyannikova IG, Pankratz VS, Vierkant RA, Pajewski NM, Quinn CP, Kaslow RA, Jacobson RM, Poland GA. Human leukocyte antigens and cellular immune responses to anthrax vaccine adsorbed. Infect Immun 2013; 81:2584-91. [PMID: 23649091 PMCID: PMC3697592 DOI: 10.1128/iai.00269-13] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 04/28/2013] [Indexed: 01/21/2023] Open
Abstract
Interindividual variations in vaccine-induced immune responses are in part due to host genetic polymorphisms in the human leukocyte antigen (HLA) and other gene families. This study examined associations between HLA genotypes, haplotypes, and homozygosity and protective antigen (PA)-specific cellular immune responses in healthy subjects following immunization with Anthrax Vaccine Adsorbed (AVA). While limited associations were observed between individual HLA alleles or haplotypes and variable lymphocyte proliferative (LP) responses to AVA, analyses of homozygosity supported the hypothesis of a "heterozygote advantage." Individuals who were homozygous for any HLA locus demonstrated significantly lower PA-specific LP than subjects who were heterozygous at all eight loci (median stimulation indices [SI], 1.84 versus 2.95, P = 0.009). Similarly, we found that class I (HLA-A) and class II (HLA-DQA1 and HLA-DQB1) homozygosity was significantly associated with an overall decrease in LP compared with heterozygosity at those three loci. Specifically, individuals who were homozygous at these loci had significantly lower PA-specific LP than subjects heterozygous for HLA-A (median SI, 1.48 versus 2.13, P = 0.005), HLA-DQA1 (median SI, 1.75 versus 2.11, P = 0.007), and HLA-DQB1 (median SI, 1.48 versus 2.13, P = 0.002) loci, respectively. Finally, homozygosity at an increasing number (≥ 4) of HLA loci was significantly correlated with a reduction in LP response (P < 0.001) in a dose-dependent manner. Additional studies are needed to reproduce these findings and determine whether HLA-heterozygous individuals generate stronger cellular immune response to other virulence factors (Bacillus anthracis LF and EF) than HLA-homozygous subjects.
Collapse
Affiliation(s)
- Inna G. Ovsyannikova
- Mayo Clinic Vaccine Research Group, Mayo Clinic, Rochester, Minnesota, USA
- Program in Translational Immunovirology and Biodefense, Mayo Clinic, Rochester, Minnesota, USA
| | - V. Shane Pankratz
- Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota, USA
| | - Robert A. Vierkant
- Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota, USA
| | - Nicholas M. Pajewski
- Department of Biostatistical Sciences, Wake Forest University Health Sciences, Winston Salem, North Carolina, USA
| | - Conrad P. Quinn
- Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Richard A. Kaslow
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Robert M. Jacobson
- Mayo Clinic Vaccine Research Group, Mayo Clinic, Rochester, Minnesota, USA
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Gregory A. Poland
- Mayo Clinic Vaccine Research Group, Mayo Clinic, Rochester, Minnesota, USA
- Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, Minnesota, USA
- Program in Translational Immunovirology and Biodefense, Mayo Clinic, Rochester, Minnesota, USA
| |
Collapse
|
25
|
Falola MI, Wiener HW, Wineinger NE, Cutter GR, Kimberly RP, Edberg JC, Arnett DK, Kaslow RA, Tang J, Shrestha S. Genomic copy number variants: evidence for association with antibody response to anthrax vaccine adsorbed. PLoS One 2013; 8:e64813. [PMID: 23741398 PMCID: PMC3669407 DOI: 10.1371/journal.pone.0064813] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 04/09/2013] [Indexed: 01/09/2023] Open
Abstract
Background Anthrax and its etiologic agent remain a biological threat. Anthrax vaccine is highly effective, but vaccine-induced IgG antibody responses vary widely following required doses of vaccinations. Such variation can be related to genetic factors, especially genomic copy number variants (CNVs) that are known to be enriched among genes with immunologic function. We have tested this hypothesis in two study populations from a clinical trial of anthrax vaccination. Methods We performed CNV-based genome-wide association analyses separately on 794 European Americans and 200 African-Americans. Antibodies to protective antigen were measured at week 8 (early response) and week 30 (peak response) using an enzyme-linked immunosorbent assay. We used DNA microarray data (Affymetrix 6.0) and two CNV detection algorithms, hidden markov model (PennCNV) and circular binary segmentation (GeneSpring) to determine CNVs in all individuals. Multivariable regression analyses were used to identify CNV-specific associations after adjusting for relevant non-genetic covariates. Results Within the 22 autosomal chromosomes, 2,943 non-overlapping CNV regions were detected by both algorithms. Genomic insertions containing HLA-DRB5, DRB1 and DQA1/DRA genes in the major histocompatibility complex (MHC) region (chromosome 6p21.3) were moderately associated with elevated early antibody response (β = 0.14, p = 1.78×10−3) among European Americans, and the strongest association was observed between peak antibody response and a segmental insertion on chromosome 1, containing NBPF4, NBPF5, STXMP3, CLCC1, and GPSM2 genes (β = 1.66, p = 6.06×10−5). For African-Americans, segmental deletions spanning PRR20, PCDH17 and PCH68 genes on chromosome 13 were associated with elevated early antibody production (β = 0.18, p = 4.47×10−5). Population-specific findings aside, one genomic insertion on chromosome 17 (containing NSF, ARL17 and LRRC37A genes) was associated with elevated peak antibody response in both populations. Conclusion Multiple CNV regions, including the one consisting of MHC genes that is consistent with earlier research, can be important to humoral immune responses to anthrax vaccine adsorbed.
Collapse
Affiliation(s)
- Michael I. Falola
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Howard W. Wiener
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Nathan E. Wineinger
- Scripps Translational Science Institute, La Jolla, California, United States of America
| | - Gary R. Cutter
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Robert P. Kimberly
- Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Jeffrey C. Edberg
- Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Donna K. Arnett
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Richard A. Kaslow
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Jianming Tang
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Sadeep Shrestha
- Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail:
| |
Collapse
|
26
|
Manish M, Rahi A, Kaur M, Bhatnagar R, Singh S. A single-dose PLGA encapsulated protective antigen domain 4 nanoformulation protects mice against Bacillus anthracis spore challenge. PLoS One 2013; 8:e61885. [PMID: 23637922 PMCID: PMC3639271 DOI: 10.1371/journal.pone.0061885] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 03/14/2013] [Indexed: 12/11/2022] Open
Abstract
Bacillus anthracis, the etiological agent of anthrax, is a major bioterror agent. Vaccination is the most effective prophylactic measure available against anthrax. Currently available anthrax vaccines have issues of the multiple booster dose requirement, adjuvant-associated side effects and stability. Use of biocompatible and biodegradable nanoparticles to deliver the antigens to immune cells could solve the issues associated with anthrax vaccines. We hypothesized that the delivery of a stable immunogenic domain 4 of protective antigen (PAD4) of Bacillus anthracis encapsulated in a poly (lactide-co-glycolide) (PLGA)--an FDA approved biocompatible and biodegradable material, may alleviate the problems of booster dose, adjuvant toxicity and stability associated with anthrax vaccines. We made a PLGA based protective antigen domain 4 nanoparticle (PAD4-NP) formulation using water/oil/water solvent evaporation method. Nanoparticles were characterized for antigen content, morphology, size, polydispersity and zeta potential. The immune correlates and protective efficacy of the nanoparticle formulation was evaluated in Swiss Webster outbred mice. Mice were immunized with single dose of PAD4-NP or recombinant PAD4. The PAD4-NP elicited a robust IgG response with mixed IgG1 and IgG2a subtypes, whereas the control PAD4 immunized mice elicited low IgG response with predominant IgG1 subtype. The PAD4-NP generated mixed Th1/Th2 response, whereas PAD4 elicited predominantly Th2 response. When we compared the efficacy of this single-dose vaccine nanoformulation PAD4-NP with that of the recombinant PAD4 in providing protective immunity against a lethal challenge with Bacillus anthracis spores, the median survival of PAD4-NP immunized mice was 6 days as compared to 1 day for PAD4 immunized mice (p<0.001). Thus, we demonstrate, for the first time, the possibility of the development of a single-dose and adjuvant-free protective antigen based anthrax vaccine in the form of PAD4-NP. Further work in this direction may produce a better and safer candidate anthrax vaccine.
Collapse
Affiliation(s)
- Manish Manish
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Amit Rahi
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Manpreet Kaur
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Rakesh Bhatnagar
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | - Samer Singh
- Special Centre for Nano Sciences, Jawaharlal Nehru University, New Delhi, India
| |
Collapse
|
27
|
Liu X, Wang D, Ren J, Tong C, Feng E, Wang X, Zhu L, Wang H. Identification of the immunogenic spore and vegetative proteins of Bacillus anthracis vaccine strain A16R. PLoS One 2013; 8:e57959. [PMID: 23516421 PMCID: PMC3596338 DOI: 10.1371/journal.pone.0057959] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 01/29/2013] [Indexed: 01/03/2023] Open
Abstract
Immunoproteomics was used to screen the immunogenic spore and vegetative proteins of Bacillus anthracis vaccine strain A16R. The spore and vegetative proteins were separated by 2D gel electrophoresis and transferred to polyvinylidene difluoride membranes, and then western blotting was performed with rabbit immune serum against B.anthracis live spores. Immunogenic spots were cut and digested by trypsin. Matrix-assisted laser desorption ionization time-of-flight mass spectrometry was performed to identify the proteins. As a result, 11 and 45 immunogenic proteins were identified in the spores and vegetative cells, respectively; 26 of which have not been reported previously. To verify their immunogenicity, 12 of the identified proteins were selected to be expressed, and the immune sera from the mice vaccinated by the 12 expressed proteins, except BA0887, had a specific western blot band with the A16R whole cellular lytic proteins. Some of these immunogenic proteins might be used as novel vaccine candidates themselves or for enhancing the protective efficacy of a protective-antigen-based vaccine.
Collapse
Affiliation(s)
- Xiankai Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
| | - Dongshu Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
| | - Jingxiao Ren
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
| | - Chao Tong
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
| | - Erling Feng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
| | - Xuefang Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
| | - Li Zhu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
- * E-mail: (LZ); (HW)
| | - Hengliang Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Biotechnology, Beijing, People's Republic of China
- * E-mail: (LZ); (HW)
| |
Collapse
|
28
|
Chichester JA, Manceva SD, Rhee A, Coffin MV, Musiychuk K, Mett V, Shamloul M, Norikane J, Streatfield SJ, Yusibov V. A plant-produced protective antigen vaccine confers protection in rabbits against a lethal aerosolized challenge with Bacillus anthracis Ames spores. Hum Vaccin Immunother 2013; 9:544-52. [PMID: 23324615 PMCID: PMC3891710 DOI: 10.4161/hv.23233] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 11/21/2012] [Indexed: 11/19/2022] Open
Abstract
The potential use of Bacillus anthracis as a bioterrorism weapon threatens the security of populations globally, requiring the immediate availability of safe, efficient and easily delivered anthrax vaccine for mass vaccination. Extensive research efforts have been directed toward the development of recombinant subunit vaccines based on protective antigen (PA), the principal virulence factor of B. anthracis. Among the emerging technologies for the production of these vaccine antigens is our launch vector-based plant transient expression system. Using this system, we have successfully engineered, expressed, purified and characterized full-length PA (pp-PA83) in Nicotiana benthamiana plants using agroinfiltration. This plant-produced antigen elicited high toxin neutralizing antibody titers in mice and rabbits after two vaccine administrations with Alhydrogel. In addition, immunization with this vaccine candidate protected 100% of rabbits from a lethal aerosolized B. anthracis challenge. The vaccine effects were dose-dependent and required the presence of Alhydrogel adjuvant. In addition, the vaccine antigen formulated with Alhydrogel was stable and retained immunogenicity after two-week storage at 4°C, the conditions intended for clinical use. These results support the testing of this vaccine candidate in human volunteers and the utility of our plant expression system for the production of a recombinant anthrax vaccine.
Collapse
MESH Headings
- Adjuvants, Immunologic/administration & dosage
- Aerosols
- Aluminum Hydroxide/administration & dosage
- Animals
- Anthrax/immunology
- Anthrax/prevention & control
- Anthrax Vaccines/administration & dosage
- Anthrax Vaccines/immunology
- Antibodies, Bacterial/blood
- Antibodies, Neutralizing/blood
- Antigens, Bacterial/administration & dosage
- Antigens, Bacterial/genetics
- Antigens, Bacterial/immunology
- Antigens, Bacterial/isolation & purification
- Bacterial Toxins/administration & dosage
- Bacterial Toxins/genetics
- Bacterial Toxins/immunology
- Bacterial Toxins/isolation & purification
- Disease Models, Animal
- Inhalation Exposure
- Mice, Inbred BALB C
- Plants, Genetically Modified/genetics
- Rabbits
- Survival Analysis
- Nicotiana/genetics
- Treatment Outcome
- Vaccines, Subunit/administration & dosage
- Vaccines, Subunit/immunology
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/immunology
Collapse
Affiliation(s)
| | | | - Amy Rhee
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| | - Megan V. Coffin
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| | | | - Vadim Mett
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| | - Moneim Shamloul
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| | - Joey Norikane
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| | | | - Vidadi Yusibov
- Fraunhofer USA Center for Molecular Biotechnology; Newark, DE USA
| |
Collapse
|
29
|
Corey A, Migone TS, Bolmer S, Fiscella M, Ward C, Chen C, Meister G. Bacillus anthracis protective antigen kinetics in inhalation spore-challenged untreated or levofloxacin/ raxibacumab-treated New Zealand white rabbits. Toxins (Basel) 2013; 5:120-38. [PMID: 23344456 PMCID: PMC3564073 DOI: 10.3390/toxins5010120] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 09/29/2012] [Accepted: 12/17/2012] [Indexed: 11/26/2022] Open
Abstract
Inhaled Bacillus anthracis spores germinate and the subsequent vegetative growth results in bacteremia and toxin production. Anthrax toxin is tripartite: the lethal factor and edema factor are enzymatic moieties, while the protective antigen (PA) binds to cell receptors and the enzymatic moieties. Antibiotics can control B. anthracis bacteremia, whereas raxibacumab binds PA and blocks lethal toxin effects. This study assessed plasma PA kinetics in rabbits following an inhaled B. anthracis spore challenge. Additionally, at 84 h post-challenge, 42% of challenged rabbits that had survived were treated with either levofloxacin/placebo or levofloxacin/raxibacumab. The profiles were modeled using a modified Gompertz/second exponential growth phase model in untreated rabbits, with added monoexponential PA elimination in treated rabbits. Shorter survival times were related to a higher plateau and a faster increase in PA levels. PA elimination half-lives were 10 and 19 h for the levofloxacin/placebo and levofloxacin/raxibacumab groups, respectively, with the difference attributable to persistent circulating PA-raxibacumab complex. PA kinetics were similar between untreated and treated rabbits, with one exception: treated rabbits had a plateau phase nearly twice as long as that for untreated rabbits. Treated rabbits that succumbed to disease had higher plateau PA levels and shorter plateau duration than surviving treated rabbits.
Collapse
MESH Headings
- Adjuvants, Immunologic/administration & dosage
- Administration, Inhalation
- Animals
- Anthrax/immunology
- Anthrax/mortality
- Anthrax/prevention & control
- Anthrax Vaccines/administration & dosage
- Anthrax Vaccines/immunology
- Anti-Bacterial Agents/pharmacology
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal, Humanized
- Antigens, Bacterial/administration & dosage
- Antigens, Bacterial/immunology
- Antigens, Bacterial/metabolism
- Bacillus anthracis/immunology
- Bacterial Toxins/immunology
- Disease Models, Animal
- Female
- Kinetics
- Levofloxacin
- Male
- Ofloxacin/pharmacology
- Rabbits
- Spores, Bacterial/immunology
- Survival Analysis
Collapse
Affiliation(s)
- Alfred Corey
- Human Genome Sciences, Inc., 14200 Shady Grove Road, Rockville, MD 20850, USA; E-Mails: (T.-S.M.); (S.B.); (M.F.); (C.W.); (C.C.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-919-483-7032; Fax: +1-919-483-7032
| | - Thi-Sau Migone
- Human Genome Sciences, Inc., 14200 Shady Grove Road, Rockville, MD 20850, USA; E-Mails: (T.-S.M.); (S.B.); (M.F.); (C.W.); (C.C.)
| | - Sally Bolmer
- Human Genome Sciences, Inc., 14200 Shady Grove Road, Rockville, MD 20850, USA; E-Mails: (T.-S.M.); (S.B.); (M.F.); (C.W.); (C.C.)
| | - Michele Fiscella
- Human Genome Sciences, Inc., 14200 Shady Grove Road, Rockville, MD 20850, USA; E-Mails: (T.-S.M.); (S.B.); (M.F.); (C.W.); (C.C.)
| | - Chris Ward
- Human Genome Sciences, Inc., 14200 Shady Grove Road, Rockville, MD 20850, USA; E-Mails: (T.-S.M.); (S.B.); (M.F.); (C.W.); (C.C.)
| | - Cecil Chen
- Human Genome Sciences, Inc., 14200 Shady Grove Road, Rockville, MD 20850, USA; E-Mails: (T.-S.M.); (S.B.); (M.F.); (C.W.); (C.C.)
| | - Gabriel Meister
- Battelle Biomedical Research Center, 505 King Ave., JM-7, Columbus, OH 43201, USA; E-Mail:
| |
Collapse
|
30
|
Verma A, McNichol B, Domínguez-Castillo RI, Amador-Molina JC, Arciniega JL, Reiter K, Meade BD, Ngundi MM, Stibitz S, Burns DL. Use of site-directed mutagenesis to model the effects of spontaneous deamidation on the immunogenicity of Bacillus anthracis protective antigen. Infect Immun 2013; 81:278-84. [PMID: 23115046 PMCID: PMC3536148 DOI: 10.1128/iai.00863-12] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 10/25/2012] [Indexed: 12/25/2022] Open
Abstract
Long-term stability is a desired characteristic of vaccines, especially anthrax vaccines, which must be stockpiled for large-scale use in an emergency situation; however, spontaneous deamidation of purified vaccine antigens has the potential to adversely affect vaccine immunogenicity over time. In order to explore whether spontaneous deamidation of recombinant protective antigen (rPA)--the major component of new-generation anthrax vaccines--affects vaccine immunogenicity, we created a "genetically deamidated" form of rPA using site-directed mutagenesis to replace six deamidation-prone asparagine residues, at positions 408, 466, 537, 601, 713, and 719, with either aspartate, glutamine, or alanine residues. We found that the structure of the six-Asp mutant rPA was not significantly altered relative to that of the wild-type protein as assessed by circular dichroism (CD) spectroscopy and biological activity. In contrast, immunogenicity of aluminum-adjuvanted six-Asp mutant rPA, as measured by induction of toxin-neutralizing antibodies, was significantly lower than that of the corresponding wild-type rPA vaccine formulation. The six-Gln and six-Ala mutants also exhibited lower immunogenicity than the wild type. While the wild-type rPA vaccine formulation exhibited a high level of immunogenicity initially, its immunogenicity declined significantly upon storage at 25°C for 4 weeks. In contrast, the immunogenicity of the six-Asp mutant rPA vaccine formulation was low initially but did not change significantly upon storage. Taken together, results from this study suggest that spontaneous deamidation of asparagine residues predicted to occur during storage of rPA vaccines would adversely affect vaccine immunogenicity and therefore the storage life of vaccines.
Collapse
MESH Headings
- Animals
- Anthrax/immunology
- Anthrax/prevention & control
- Anthrax Vaccines/genetics
- Anthrax Vaccines/immunology
- Anthrax Vaccines/metabolism
- Antibodies, Bacterial/biosynthesis
- Antibodies, Bacterial/immunology
- Antibodies, Neutralizing/biosynthesis
- Antibodies, Neutralizing/immunology
- Antibody Formation/genetics
- Antibody Formation/immunology
- Antigens, Bacterial/chemistry
- Antigens, Bacterial/genetics
- Antigens, Bacterial/immunology
- Antigens, Bacterial/metabolism
- Asparagine/immunology
- Asparagine/metabolism
- Bacillus anthracis/genetics
- Bacillus anthracis/immunology
- Bacillus anthracis/metabolism
- Cells, Cultured
- Female
- Macrophages/immunology
- Macrophages/metabolism
- Mice
- Mutagenesis, Site-Directed/methods
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Vaccines, Synthetic/metabolism
Collapse
Affiliation(s)
- Anita Verma
- Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, USA
| | - Beth McNichol
- Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, USA
| | | | - Juan C. Amador-Molina
- Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, USA
| | - Juan L. Arciniega
- Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, USA
| | - Karine Reiter
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, USA
| | | | - Miriam M. Ngundi
- Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, USA
| | - Scott Stibitz
- Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, USA
| | - Drusilla L. Burns
- Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland, USA
| |
Collapse
|
31
|
|
32
|
Fay MP, Follmann DA, Lynn F, Schiffer JM, Stark GV, Kohberger R, Quinn CP, Nuzum EO. Anthrax vaccine-induced antibodies provide cross-species prediction of survival to aerosol challenge. Sci Transl Med 2012; 4:151ra126. [PMID: 22972844 PMCID: PMC3668972 DOI: 10.1126/scitranslmed.3004073] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Because clinical trials to assess the efficacy of vaccines against anthrax are not ethical or feasible, licensure for new anthrax vaccines will likely involve the Food and Drug Administration's "Animal Rule," a set of regulations that allow approval of products based on efficacy data only in animals combined with immunogenicity and safety data in animals and humans. U.S. government-sponsored animal studies have shown anthrax vaccine efficacy in a variety of settings. We examined data from 21 of those studies to determine whether an immunological bridge based on lethal toxin neutralization activity assay (TNA) can predict survival against an inhalation anthrax challenge within and across species and genera. The 21 studies were classified into 11 different settings, each of which had the same animal species, vaccine type and formulation, vaccination schedule, time of TNA measurement, and challenge time. Logistic regression models determined the contribution of vaccine dilution dose and TNA on prediction of survival. For most settings, logistic models using only TNA explained more than 75% of the survival effect of the models with dose additionally included. Cross-species survival predictions using TNA were compared to the actual survival and shown to have good agreement (Cohen's κ ranged from 0.55 to 0.78). In one study design, cynomolgus macaque data predicted 78.6% survival in rhesus macaques (actual survival, 83.0%) and 72.6% in rabbits (actual survival, 64.6%). These data add support for the use of TNA as an immunological bridge between species to extrapolate data in animals to predict anthrax vaccine effectiveness in humans.
Collapse
Affiliation(s)
- Michael P Fay
- Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, 6700B Rockledge Drive, Bethesda, MD 20892-7630, USA.
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Kwok WW, Tan V, Gillette L, Littell CT, Soltis MA, LaFond RB, Yang J, James EA, DeLong JH. Frequency of epitope-specific naive CD4(+) T cells correlates with immunodominance in the human memory repertoire. J Immunol 2012; 188:2537-44. [PMID: 22327072 PMCID: PMC3997369 DOI: 10.4049/jimmunol.1102190] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The frequency of epitope-specific naive CD4(+) T cells in humans has not been extensively examined. In this study, a systematic approach was used to examine the frequency of CD4(+) T cells that recognize the protective Ag of Bacillus anthracis in both anthrax vaccine-adsorbed vaccinees and nonvaccinees with HLA-DRB1*01:01 haplotypes. Three epitopes were identified that had distinct degrees of immunodominance in subjects that had received the vaccine. Average naive precursor frequencies of T cells specific for these different epitopes in the human repertoire ranged from 0.2 to 10 per million naive CD4(+) T cells, which is comparable to precursor frequencies observed in the murine repertoire. Frequencies of protective Ag-specific T cells were two orders of magnitude higher in immunized subjects than in nonvaccinees. The frequencies of epitope-specific memory CD4(+) T cells in vaccinees were directly correlated with the frequencies of precursors in the naive repertoire. At the level of TCR usage, at least one preferred Vβ in the naive repertoire was present in the memory repertoire. These findings implicate naive frequencies as a crucial factor in shaping the epitope specificity of memory CD4(+) T cell responses.
Collapse
Affiliation(s)
- William W Kwok
- Benaroya Research Institute at Virginia Mason, Seattle, WA 98101-2795, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Wang SH, Kirwan SM, Abraham SN, Staats HF, Hickey AJ. Stable dry powder formulation for nasal delivery of anthrax vaccine. J Pharm Sci 2012; 101:31-47. [PMID: 21905034 PMCID: PMC3725471 DOI: 10.1002/jps.22742] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 08/04/2011] [Accepted: 08/10/2011] [Indexed: 11/12/2022]
Abstract
There is a current biodefense interest in protection against anthrax. Here, we developed a new generation of stable and effective anthrax vaccine. We studied the immune response elicited by recombinant protective antigen (rPA) delivered intranasally with a novel mucosal adjuvant, a mast cell activator compound 48/80 (C48/80). The vaccine formulation was prepared in a powder form by spray-freeze-drying (SFD) under optimized conditions to produce particles with a target size of D(50) = 25 μm, suitable for delivery to the rabbit nasal cavity. Physicochemical properties of the powder vaccines were characterized to assess their delivery and storage potential. Structural stability of rPA was confirmed by circular dichroism and attenuated total reflectance-Fourier transform infrared spectroscopy, whereas functional stability of rPA and C48/80 was monitored by cell-based assays. Animal study was performed using a unit-dose powder device for direct nasal application. Results showed that C48/80 provided effective mucosal adjuvant activity in rabbits. Freshly prepared SFD powder vaccine formulations or powders stored for over 2 years at room temperature elicited significantly elevated serum PA-specific and lethal toxin neutralization antibody titers that were comparable to that induced by intramuscular immunization with rPA. Nasal delivery of this vaccine formulation may be a viable alternative to the currently licensed vaccine or an attractive vaccine platform for other mucosally transmitted diseases.
Collapse
Affiliation(s)
- Sheena H. Wang
- Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7571, USA
| | - Shaun M. Kirwan
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | - Soman N. Abraham
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | - Herman F. Staats
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | - Anthony J. Hickey
- Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7571, USA
| |
Collapse
|
35
|
Gorantala J, Grover S, Goel D, Rahi A, Jayadev Magani SK, Chandra S, Bhatnagar R. A plant based protective antigen [PA(dIV)] vaccine expressed in chloroplasts demonstrates protective immunity in mice against anthrax. Vaccine 2011; 29:4521-33. [PMID: 21504775 DOI: 10.1016/j.vaccine.2011.03.082] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 03/11/2011] [Accepted: 03/22/2011] [Indexed: 12/29/2022]
Abstract
The currently available anthrax vaccines are limited by being incompletely characterized, potentially reactogenic and have an expanded dosage schedule. Plant based vaccines offer safe alternative for vaccine production. In the present study, we expressed domain IV of Bacillus anthracis protective antigen gene [PA(dIV)] in planta (by nuclear agrobacterium and chloroplast transformation) and E. coli [rPA(dIV)]. The presence of transgene and the expression of PA(dIV) in planta was confirmed by molecular analysis. Expression levels up to 5.3% of total soluble protein (TSP) were obtained with AT rich (71.8% AT content) PA(dIV) gene in transplastomic plants while 0.8% of TSP was obtained in nuclear transformants. Further, we investigated the protective response of plant and E. coli derived PA(dIV) in mice by intraperitoneal (i.p.) and oral immunizations with or without adjuvant. Antibody titers of >10(4) were induced upon i.p. and oral immunizations with plant derived PA(dIV) and oral immunization with E. coli derived PA(dIV). Intraperitoneal injections with adjuvanted E. coli derived PA(dIV), generated highest antibody titers of >10(5). All the immunized groups demonstrated predominant IgG1 titers over IgG2a indicating a polarized Th2 type response. We also evaluated the mucosal antibody response in orally immunized groups. When fecal extracts were analyzed, low sIgA titer was demonstrated in adjuvanted plant and E. coli derived PA(dIV) groups. Further, PA(dIV) antisera enhanced B. anthracis spore uptake by macrophages in vitro and also demonstrated an anti-germinating effect suggesting a potent role at mucosal surfaces. The antibodies from various groups were efficient in neutralizing the lethal toxin in vitro. When mice were challenged with B. anthracis, mice immunized with adjuvanted plant PA(dIV) imparted 60% and 40% protection while E. coli derived PA(dIV) conferred 100% and 80% protection upon i.p. and oral immunizations. Thus, our study is the first attempt in highlighting the efficacy of plant expressed PA(dIV) by oral immunization in murine model.
Collapse
MESH Headings
- Animals
- Anthrax/immunology
- Anthrax/prevention & control
- Anthrax Vaccines/administration & dosage
- Anthrax Vaccines/genetics
- Anthrax Vaccines/immunology
- Anthrax Vaccines/metabolism
- Antibodies, Bacterial/blood
- Antibodies, Bacterial/immunology
- Antibodies, Neutralizing/blood
- Antibodies, Neutralizing/immunology
- Antigens, Bacterial/genetics
- Antigens, Bacterial/immunology
- Antigens, Bacterial/metabolism
- Bacillus anthracis/immunology
- Bacterial Toxins/genetics
- Bacterial Toxins/immunology
- Bacterial Toxins/metabolism
- Chloroplasts/genetics
- Chloroplasts/metabolism
- Immunity, Mucosal
- Immunoglobulin A/blood
- Immunoglobulin A/immunology
- Immunoglobulin A, Secretory/immunology
- Immunoglobulin G/blood
- Immunoglobulin G/immunology
- Mice
- Mice, Inbred BALB C
- Molecular Sequence Data
- Plants, Genetically Modified
- Rhizobium/genetics
- Rhizobium/metabolism
- Nicotiana/genetics
- Nicotiana/metabolism
- Nicotiana/microbiology
- Transformation, Genetic
- Vaccination
- Vaccines, DNA/administration & dosage
- Vaccines, DNA/genetics
- Vaccines, DNA/immunology
- Vaccines, DNA/metabolism
Collapse
Affiliation(s)
- Jyotsna Gorantala
- Laboratory of Molecular Biology and Genetic Engineering, School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | | | | | | | | | | | | |
Collapse
|
36
|
Rynkiewicz D, Rathkopf M, Sim I, Waytes AT, Hopkins RJ, Giri L, DeMuria D, Ransom J, Quinn J, Nabors GS, Nielsen CJ. Marked enhancement of the immune response to BioThrax® (Anthrax Vaccine Adsorbed) by the TLR9 agonist CPG 7909 in healthy volunteers. Vaccine 2011; 29:6313-20. [PMID: 21624418 DOI: 10.1016/j.vaccine.2011.05.047] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 05/10/2011] [Accepted: 05/14/2011] [Indexed: 11/19/2022]
Abstract
Immunization with BioThrax(®) (Anthrax Vaccine Adsorbed) is a safe and effective means of preventing anthrax. Animal studies have demonstrated that the addition of CpG DNA adjuvants to BioThrax can markedly increase the immunogenicity of the vaccine, increasing both serum anti-protective antigen (PA) antibody and anthrax toxin-neutralizing antibody (TNA) concentrations. The immune response to CpG-adjuvanted BioThrax in animals was not only stronger, but was also more rapid and led to higher levels of protection in spore challenge models. The B-class CpG DNA adjuvant CPG 7909, a 24-base synthetic, single-strand oligodeoxynucleotide, was evaluated for its safety profile and adjuvant properties in a Phase 1 clinical trial. A double-blind study was performed in which 69 healthy subjects, age 18-45 years, were randomized to receive three doses of either: (1) BioThrax alone, (2) 1 mg of CPG 7909 alone or (3) BioThrax plus 1 mg of CPG 7909, all given intramuscularly on study days 0, 14 and 28. Subjects were monitored for IgG to PA by ELISA and for TNA titers through study day 56 and for safety through month 6. CPG 7909 increased the antibody response by 6-8-fold at peak, and accelerated the response by 3 weeks compared to the response seen in subjects vaccinated with BioThrax alone. No serious adverse events related to study agents were reported, and the combination was considered to be reasonably well tolerated. The marked acceleration and enhancement of the immune response seen by combining BioThrax and CPG 7909 offers the potential to shorten the course of immunization and reduce the time to protection, and may be particularly useful in the setting of post-exposure prophylaxis.
Collapse
Affiliation(s)
- Dianna Rynkiewicz
- University of Texas Health Sciences Center and Veterans' Administration Hospital, San Antonio, TX, UsA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Crowe SR, Garman L, Engler RJ, Farris AD, Ballard JD, Harley JB, James JA. Anthrax vaccination induced anti-lethal factor IgG: fine specificity and neutralizing capacity. Vaccine 2011; 29:3670-8. [PMID: 21420416 PMCID: PMC3233230 DOI: 10.1016/j.vaccine.2011.03.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 02/24/2011] [Accepted: 03/03/2011] [Indexed: 10/18/2022]
Abstract
The efficacy biomarker of the currently licensed anthrax vaccine (AVA) is based on quantity and neutralizing capacity of anti-protective antigen (anti-PA) antibodies. However, animal studies have demonstrated that antibodies to lethal factor (LF) can provide protection against in vivo bacterial spore challenges. Improved understanding of the fine specificities of humoral immune responses that provide optimum neutralization capacity may enhance the efficacy of future passive immune globulin preparations to treat and prevent inhalation anthrax morbidity and mortality. This study (n=1000) was designed to identify AVA vaccinated individuals who generate neutralizing antibodies and to determine what specificities correlate with protection. The number of vaccine doses, years post vaccination, and PA titer were associated with in vitro neutralization, reinforcing previous reports. In addition, African American individuals had lower serologic neutralizing activity than European Americans, suggesting a genetic role in the generation of these neutralizing antibodies. Of the vaccinated individuals, only 69 (6.9%) had moderate levels of anti-LF IgG compared to 244 (24.4%) with low and 687 (68.7%) with extremely low levels of IgG antibodies to LF. Using overlapping decapeptide analysis, we identified six common LF antigenic regions targeted by those individuals with moderate levels of antibodies to LF and high in vitro toxin neutralizing activity. Affinity purified antibodies directed against antigenic epitopes within the PA binding and ADP-ribotransferase-like domains of LF were able to protect mice against lethal toxin challenge. Findings from these studies have important implications for vaccine design and immunotherapeutic development.
Collapse
Affiliation(s)
- Sherry R. Crowe
- Oklahoma Medical Research Foundation, 825 N.E. 13 Street, Oklahoma City, OK, U.S.A. 73104
| | - Lori Garman
- Oklahoma Medical Research Foundation, 825 N.E. 13 Street, Oklahoma City, OK, U.S.A. 73104
- Oklahoma University Health Science Center, 1100 N. Lindsay, Oklahoma City, OK, U.S.A. 73104
| | - Renata J.M. Engler
- Vaccine Healthcare Centers (VHC) Network, Walter Reed Army Medical Center, Red Cross Building 41 Suite 021 PO Box 6900 Georgia Avenue, NW Washington, DC, U.S.A. 20012
| | - A. Darise Farris
- Oklahoma Medical Research Foundation, 825 N.E. 13 Street, Oklahoma City, OK, U.S.A. 73104
- Oklahoma University Health Science Center, 1100 N. Lindsay, Oklahoma City, OK, U.S.A. 73104
| | - Jimmy D. Ballard
- Oklahoma University Health Science Center, 1100 N. Lindsay, Oklahoma City, OK, U.S.A. 73104
| | - John B. Harley
- Oklahoma University Health Science Center, 1100 N. Lindsay, Oklahoma City, OK, U.S.A. 73104
- Cincinnati Children's Hospital Medical Center, 3333 Burnet, ML 4010, Cincinnati, OH, U.S.A. 45229
| | - Judith A. James
- Oklahoma Medical Research Foundation, 825 N.E. 13 Street, Oklahoma City, OK, U.S.A. 73104
- Oklahoma University Health Science Center, 1100 N. Lindsay, Oklahoma City, OK, U.S.A. 73104
| |
Collapse
|
38
|
Shen F, Yuan S, Zhan D, Wang Y, Ren M, Tao H, Wang P, Wang L, Chen D, Liu C. [Development of a killed but metabolically active anthracis vaccine candidate strain]. Sheng Wu Gong Cheng Xue Bao 2011; 27:781-789. [PMID: 21845845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Anthrax is a zoonosis caused by Bacillus anthracis, which seriously affects human health. In recent years, a special phenomenon is found that the metabolic active of a bacterium remains after it is killed. To development of a KBMA (killed but metabolically active) Bacillus anthracis vaccine candidate strain, a plasmid pMAD and a recombinase system Cre-loxP were used to knockout the uvrAB gene of B. anthracis AP422 which lacks both of two plasmids pXO1 and pXO2. The results of PCR and RT-PCR shows that uvrAB genes were deleted from B. anthracis AP422 chromosome successfully. The constructed B. anthracis AP422deltauvrAB was inactivated by photochemical treatment (PCT) including an exposure in a long-wave-length ultraviolet (UVA) light and a treatment of 8-Methoxypsoralen (8-MOP), then the metabolic activity were detected by the method of MTS. The results showed that the killed B. anthracis AP422deltauvrAB maintained a highly metabolic activity for at least 4 hours, showing a state of KBMA. The KBMA strain of B. anthracis AP422deltauvrAB provides the prospective vaccine candidate strain for anthrax.
Collapse
Affiliation(s)
- Fei Shen
- College of Life Sciences, Anhui Normal University, Wuhu 241000, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Mikshis NI, Popova PI, Kudriavtseva OM, Goncharova AI, Popov IA, Kutyrev VV. [Immunogenicity of protective antigen extracted from asporogenic recombinant strain Bacillus anthracis]. Zh Mikrobiol Epidemiol Immunobiol 2011:44-48. [PMID: 21446166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To study the ability of recombinant protective antigen (PA) to stimulate adaptive immune response in laboratory animals. MATERIALS AND METHODS Vaccine, recombinant, and reference strains of Bacillus anthracis were used in the study. Laboratory animals were immunized subcutaneously with two doses of antigenic preparation or one dose of B. anthracis strain. After inoculation with reference strain of B. anthracis, measurement of LD50 as well as indexes of immunity was performed by specified methods. RESULTS It was revealed that asporogenic recombinant strain has stable biological characteristics during passages in vitro and is effective producer of PA. Using 2-stage chromatography, highly purified protein was obtained. Experiments on different biomodels--BALB/c mice, guinea pigs, and rabbits--demonstrated high protective activity of PA obtained from asporogenic producer. Increase of immunity index was noted when EA1 protein from S-layer was added to preparation for immunization. CONCLUSION Immunity indexes determined in experiments on laboratory animals point to high protective efficacy of recombinant PA. Further studies of its interaction with macroorganism's innate and adaptive immunity systems are promising.
Collapse
|
40
|
Rao M, Peachman KK, Li Q, Matyas GR, Shivachandra SB, Borschel R, Morthole VI, Fernandez-Prada C, Alving CR, Rao VB. Highly effective generic adjuvant systems for orphan or poverty-related vaccines. Vaccine 2010; 29:873-7. [PMID: 21115053 DOI: 10.1016/j.vaccine.2010.11.049] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Revised: 11/14/2010] [Accepted: 11/15/2010] [Indexed: 11/19/2022]
Abstract
Safe and effective adjuvants are needed for many vaccines with limited commercial appeal, such as vaccines to infrequent (orphan) diseases or to neglected and poverty-related diseases. Here we found that three nonproprietary liposome formulations containing monophosphoryl lipid A each induced 3-fold to 5-fold increased titers of binding and neutralizing antibodies to anthrax protective antigen compared to aluminum hydroxide-adsorbed antigen in monkeys. All vaccinated monkeys were protected against lethal challenge with aerosolized Ames strain spores.
Collapse
Affiliation(s)
- Mangala Rao
- Division of Retrovirology, U.S. Military HIV Research Program, Walter Reed Army Institute of Research, 1600 East Gude Drive, Rockville, MD 20850, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Brown BK, Cox J, Gillis A, VanCott TC, Marovich M, Milazzo M, Antonille TS, Wieczorek L, McKee KT, Metcalfe K, Mallory RM, Birx D, Polonis VR, Robb ML. Phase I study of safety and immunogenicity of an Escherichia coli-derived recombinant protective antigen (rPA) vaccine to prevent anthrax in adults. PLoS One 2010; 5:e13849. [PMID: 21079762 PMCID: PMC2974626 DOI: 10.1371/journal.pone.0013849] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Accepted: 10/10/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The fatal disease caused by Bacillus anthracis is preventable with a prophylactic vaccine. The currently available anthrax vaccine requires a lengthy immunization schedule, and simpler and more immunogenic options for protection against anthrax are a priority for development. In this report we describe a phase I clinical trial testing the safety and immunogenicity of an anthrax vaccine using recombinant Escherichia coli-derived, B. anthracis protective antigen (rPA). METHODOLOGY/PRINCIPAL FINDINGS A total of 73 healthy adults ages 18-40 were enrolled and 67 received 2 injections separated by 4 weeks of either buffered saline placebo, or rPA formulated with or without 704 µg/ml Alhydrogel® adjuvant in increasing doses (5, 25, 50, 100 µg) of rPA. Participants were followed for one year and safety and immunologic data were assessed. Tenderness and warmth were the most common post-injection site reactions. No serious adverse events related to the vaccine were observed. The most robust humoral immune responses were observed in subjects receiving 50 µg of rPA formulated with Alhydrogel® with a geometric mean concentration of anti-rPA IgG antibodies of 283 µg/ml and a toxin neutralizing geometric 50% reciprocal geometric mean titer of 1061. The highest lymphoproliferative peak cellular response (median Lymphocyte Stimulation Index of 29) was observed in the group receiving 25 µg Alhydrogel®-formulated rPA. CONCLUSIONS/SIGNIFICANCE The vaccine was safe, well tolerated and stimulated a robust humoral and cellular response after two doses. TRIAL REGISTRATION ClinicalTrials.gov NCT00057525.
Collapse
Affiliation(s)
- Bruce K. Brown
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| | - Josephine Cox
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| | - Anita Gillis
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| | - Thomas C. VanCott
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| | - Mary Marovich
- United States Military HIV Research Program, Walter Reed Army Institute of Research, Rockville, Maryland, United States of America
| | - Mark Milazzo
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| | - Tanya Santelli Antonille
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| | - Lindsay Wieczorek
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| | - Kelly T. McKee
- DynPort Vaccine Company LLC, Frederick, Maryland, United States of America
| | - Karen Metcalfe
- DynPort Vaccine Company LLC, Frederick, Maryland, United States of America
| | - Raburn M. Mallory
- DynPort Vaccine Company LLC, Frederick, Maryland, United States of America
| | - Deborah Birx
- United States Military HIV Research Program, Walter Reed Army Institute of Research, Rockville, Maryland, United States of America
| | - Victoria R. Polonis
- United States Military HIV Research Program, Walter Reed Army Institute of Research, Rockville, Maryland, United States of America
| | - Merlin L. Robb
- United States Military HIV Research Program, Henry M. Jackson Foundation, Rockville, Maryland, United States of America
| |
Collapse
|
42
|
Bogacheva NV, Darmov IV, Borisevich IV, Kriuchkov AV, Pechenkin DV. [The time course of changes in cell immunological parameters during administration of live dry plague vaccine]. Klin Lab Diagn 2009:24-27. [PMID: 19827193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The study of the time course of changes in cell immunological parameters by a magnetic separation technique in human beings during the administration of plague vaccine in relation to the immunological load revealed the higher blood levels of all T lymphocyte subpopulations on day 14 after vaccination. These changes are most typical of a primary vaccinated cohort. The increased frequency of plague vaccine administration and multiple immunizations with live plague, anthrax, and tularemia vaccines produce the time-course of changes in T lymphocyte populations (subpopulations) in response to the regular administration of plague vaccine. A high immunological load in man also promotes a significant reduction in the level of B lymphocytes.
Collapse
|
43
|
Leoff C, Saile E, Rauvolfova J, Quinn CP, Hoffmaster AR, Zhong W, Mehta AS, Boons GJ, Carlson RW, Kannenberg EL. Secondary cell wall polysaccharides of Bacillus anthracis are antigens that contain specific epitopes which cross-react with three pathogenic Bacillus cereus strains that caused severe disease, and other epitopes common to all the Bacillus cereus strains tested. Glycobiology 2009; 19:665-73. [PMID: 19270075 PMCID: PMC2682610 DOI: 10.1093/glycob/cwp036] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2009] [Revised: 02/27/2009] [Accepted: 02/27/2009] [Indexed: 11/12/2022] Open
Abstract
The immunoreactivities of hydrogen fluoride (HF)-released cell wall polysaccharides (HF-PSs) from selected Bacillus anthracis and Bacillus cereus strains were compared using antisera against live and killed B. anthracis spores. These antisera bound to the HF-PSs from B. anthracis and from three clinical B. cereus isolates (G9241, 03BB87, and 03BB102) obtained from cases of severe or fatal human pneumonia but did not bind to the HF-PSs from the closely related B. cereus ATCC 10987 or from B. cereus type strain ATCC 14579. Antiserum against a keyhole limpet hemocyanin conjugate of the B. anthracis HF-PS (HF-PS-KLH) also bound to HF-PSs and cell walls from B. anthracis and the three clinical B. cereus isolates, and B. anthracis spores. These results indicate that the B. anthracis HF-PS is an antigen in both B. anthracis cell walls and spores, and that it shares cross-reactive, and possibly pathogenicity-related, epitopes with three clinical B. cereus isolates that caused severe disease. The anti-HF-PS-KLH antiserum cross-reacted with the bovine serum albumin (BSA)-conjugates of all B. anthracis and all B. cereus HF-PSs tested, including those from nonclinical B. cereus ATCC 10987 and ATCC 14579 strains. Finally, the serum of vaccinated (anthrax vaccine adsorbed (AVA)) Rhesus macaques that survived inhalation anthrax contained IgG antibodies that bound the B. anthracis HF-PS-KLH conjugate. These data indicate that HF-PSs from the cell walls of the bacilli tested here are (i) antigens that contain (ii) a potentially virulence-associated carbohydrate antigen motif, and (iii) another antigenic determinant that is common to B. cereus strains.
Collapse
Affiliation(s)
| | | | - Jana Rauvolfova
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602
| | - Conrad P Quinn
- Centers for Disease Control and Prevention, 1600 Clifton Rd., MS D-11, Atlanta, GA 30333, USA
| | - Alex R Hoffmaster
- Centers for Disease Control and Prevention, 1600 Clifton Rd., MS D-11, Atlanta, GA 30333, USA
| | - Wei Zhong
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602
| | - Alok S Mehta
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602
| | - Geert-Jan Boons
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602
| | - Russell W Carlson
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602
| | | |
Collapse
|
44
|
McGowen AL, Hale LP, Shelburne CP, Abraham SN, Staats HF. The mast cell activator compound 48/80 is safe and effective when used as an adjuvant for intradermal immunization with Bacillus anthracis protective antigen. Vaccine 2009; 27:3544-52. [PMID: 19464533 DOI: 10.1016/j.vaccine.2009.03.069] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Revised: 03/20/2009] [Accepted: 03/24/2009] [Indexed: 11/18/2022]
Abstract
We evaluated the safety and efficacy of the mast cell activator compound 48/80 (C48/80) when used as an adjuvant delivered intradermally (ID) with recombinant anthrax protective antigen (rPA) in comparison with two well-known adjuvants. Mice were vaccinated in the ear pinnae with rPA or rPA+C48/80, CpG oligodeoxynucleotides (CpG), or cholera toxin (CT). All adjuvants induced similar increases in serum anti-rPA IgG and lethal toxin neutralizing antibodies. C48/80 induced a balanced cytokine production (Th1/Th2/Th17) by antigen-restimulated splenocytes, minimal injection site inflammation, and no antigen-specific IgE. Histological analysis demonstrated that vaccination with C48/80 reduced the number of resident mast cells and induced an injection site neutrophil influx within 24h. Our data demonstrate that C48/80 is a safe and effective adjuvant, when used by the intradermal route, to induce protective antibody and balanced Th1/Th2/Th17 responses.
Collapse
Affiliation(s)
- Afton L McGowen
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | | | | | | | | |
Collapse
|
45
|
Mohamadzadeh M, Duong T, Sandwick SJ, Hoover T, Klaenhammer TR. Dendritic cell targeting of Bacillus anthracis protective antigen expressed by Lactobacillus acidophilus protects mice from lethal challenge. Proc Natl Acad Sci U S A 2009; 106:4331-6. [PMID: 19246373 PMCID: PMC2647975 DOI: 10.1073/pnas.0900029106] [Citation(s) in RCA: 157] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2008] [Indexed: 02/06/2023] Open
Abstract
Efficient vaccines potentiate antibody avidity and increase T cell longevity, which confer protection against microbial lethal challenge. A vaccine strategy was established by using Lactobacillus acidophilus to deliver Bacillus anthracis protective antigen (PA) via specific dendritic cell-targeting peptides to dendritic cells (DCs), which reside in the periphery and mucosal surfaces, thus directing and regulating acquired immunity. The efficiency of oral delivery of L. acidophilus expressing a PA-DCpep fusion was evaluated in mice challenged with lethal B. anthracis Sterne. Vaccination with L. acidophilus expressing PA-DCpep induced robust protective immunity against B. anthracis Sterne compared with mice vaccinated with L. acidophilus expressing PA-control peptide or an empty vector. Additionally, serum anti-PA titers, neutralizing PA antibodies, and the levels of IgA-expressing cells were all comparable with the historical recombinant PA plus aluminum hydroxide vaccine administered s.c. Collectively, development of this strategy for oral delivery of DC-targeted antigens provides a safe and protective vaccine via a bacterial adjuvant that may potentiate mucosal immune responses against deadly pathogens.
Collapse
Affiliation(s)
- M. Mohamadzadeh
- School of Medicine, Northwestern University, Chicago, IL 60611
| | - T. Duong
- Genomic Sciences Graduate Program and
- Department of Food, Bioprocessing, and Nutrition Sciences, North Carolina State University, Raleigh, NC 27695
| | - S. J. Sandwick
- United States Army Medical Research Institute of Infectious Diseases, Frederick, MD 21792; and
| | - T. Hoover
- United States Army Medical Research Institute of Infectious Diseases, Frederick, MD 21792; and
| | - T. R. Klaenhammer
- Genomic Sciences Graduate Program and
- Department of Food, Bioprocessing, and Nutrition Sciences, North Carolina State University, Raleigh, NC 27695
| |
Collapse
|
46
|
Midha S, Bhatnagar R. Anthrax protective antigen administered by DNA vaccination to distinct subcellular locations potentiates humoral and cellular immune responses. Eur J Immunol 2009; 39:159-77. [PMID: 19130551 DOI: 10.1002/eji.200838058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Based on the hypothesis that immune outcome can be influenced by the form of antigen administered and its ability to access various antigen-processing pathways, we targeted the 63 kDa fragment of protective antigen (PA) of Bacillus anthracis to various subcellular locations by DNA chimeras bearing a set of signal sequences. These targeting signals, namely, lysosome-associated membrane protein 1 (LAMP1), tissue plasminogen activator (TPA) and ubiquitin, encoded various forms of PA viz. lysosomal, secreted and cytosolic, respectively. Examination of IgG subclass distribution arising as a result of DNA vaccination indicated a higher IgG1:IgG2a ratio whenever the groups were immunized with chimeras bearing TPA, LAMP1 signals alone or when combined together. Importantly, high end-point titers of IgG antibodies were maintained until 24 wk. It was paralleled by high avidity toxin neutralizing antibodies (TNA) and effective cellular adaptive immunity in the systemic compartment. Anti-PA and TNA titers of approximately 10(5) and approximately 10(3), respectively, provided protection to approximately 90% of vaccinated animals in the group pTPA-PA63-LAMP1. A significant correlation was found between survival percentage and post-challenge anti-PA titers and TNA titers. Overall, immune kinetics pointed that differential processing through various compartments gave rise to qualitative differences in the immune response generated by various chimeras.
Collapse
Affiliation(s)
- Shuchi Midha
- School of Biotechnology, Jawaharlal Nehru University, New Delhi, India
| | | |
Collapse
|
47
|
Zakowska D, Kocik J, Bartoszcze M. [Selected research problems of anthrax vaccine development]. Przegl Epidemiol 2009; 63:505-512. [PMID: 20120948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The threat of bioterrorism with B. anthracis against civilian population is one of major concern. After successful bioterroristic attack in 2001 in US renewed research interest has prompted in the development of new and more effective vaccine against anthrax. There are two licensed vaccines against anthrax--AVA-Bio-Thrax US and UK--sterile culture filtrate prepared by alum precipitation. Both vaccines are based on PA antigen. There are several concerns regarding PA based vaccines. They require six sc injections and yearly booster, high rates of local reaction after vaccination is observed, the immunity is not long lasting, vaccination do not protect animals against different strains of B. anthracis. New strategies in the development of anthrax vaccines have been presented (recombinant PA, subunits vaccine, mutants, conjugated). Using proteomic approaches new antigens have been also identified as candidates for future vaccines. More effective and easy to perform methods of vaccination have been reviewed.
Collapse
|
48
|
Marano N, Plikaytis BD, Martin SW, Rose C, Semenova VA, Martin SK, Freeman AE, Li H, Mulligan MJ, Parker SD, Babcock J, Keitel W, El Sahly H, Poland GA, Jacobson RM, Keyserling HL, Soroka SD, Fox SP, Stamper JL, McNeil MM, Perkins BA, Messonnier N, Quinn CP. Effects of a reduced dose schedule and intramuscular administration of anthrax vaccine adsorbed on immunogenicity and safety at 7 months: a randomized trial. JAMA 2008; 300:1532-43. [PMID: 18827210 DOI: 10.1001/jama.300.13.1532] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
CONTEXT In 1999, the US Congress directed the Centers for Disease Control and Prevention to conduct a pivotal safety and efficacy study of anthrax vaccine adsorbed (AVA). OBJECTIVE To determine the effects on serological responses and injection site adverse events (AEs) resulting from changing the route of administration of AVA from subcutaneous (s.q.) to intramuscular (i.m.) and omitting the week 2 dose from the licensed schedule. DESIGN, SETTING, AND PARTICIPANTS Assessment of the first 1005 enrollees in a multisite, randomized, double-blind, noninferiority, phase 4 human clinical trial (ongoing from May 2002). INTERVENTION Healthy adults received AVA by the s.q. (reference group) or i.m. route at 0, 2, and 4 weeks and 6 months (4-SQ or 4-IM; n = 165-170 per group) or at a reduced 3-dose schedule (3-IM; n = 501). A control group (n = 169) received saline injections at the same time intervals. MAIN OUTCOME MEASURES Noninferiority at week 8 and month 7 of anti-protective antigen IgG geometric mean concentration (GMC), geometric mean titer (GMT), and proportion of responders with a 4-fold rise in titer (%4 x R). Reactogenicity outcomes were proportions of injection site and systemic AEs. RESULTS At week 8, the 4-IM group (GMC, 90.8 microg/mL; GMT, 1114.8; %4 x R, 97.7) was noninferior to the 4-SQ group (GMC, 105.1 microg/mL; GMT, 1315.4; %4 x R, 98.8) for all 3 primary end points. The 3-IM group was noninferior for only the %4 x R (GMC, 52.2 microg/mL; GMT, 650.6; %4 x R, 94.4). At month 7, all groups were noninferior to the licensed regimen for all end points. Solicited injection site AEs assessed during examinations occurred at lower proportions in the 4-IM group compared with 4-SQ. The odds ratio for ordinal end point pain reported immediately after injection was reduced by 50% for the 4-IM vs 4-SQ groups (P < .001). Route of administration did not significantly influence the occurrence of systemic AEs. CONCLUSIONS The 4-IM and 3-IM regimens of AVA provided noninferior immunological priming by month 7 when compared with the 4-SQ licensed regimen. Intramuscular administration significantly reduced the occurrence of injection site AEs. Trial Registration clinicaltrials.gov Identifier: NCT00119067.
Collapse
Affiliation(s)
- Nina Marano
- Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Lü J, He R, Dong M, Zhang L, Wang X. Immunological dynamics in response to two anthrax vaccines in mice. ACTA ACUST UNITED AC 2008; 51:872-8. [PMID: 18815750 DOI: 10.1007/s11427-008-0119-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Accepted: 06/02/2008] [Indexed: 11/28/2022]
Abstract
In order to understand the variation of humoral and cellular immune responses to A16R live spore and AVA vaccine and to identify efficient immunological parameters for the early evaluation of post immunization in mice, we dynamically monitored the antibody production and cellular responses after the vaccination of Balb/C mice with the anthrax vaccines. The results show that both anti-AVA and anti-Spore antibodies were detectable in the A16R live spore vaccinated group while high titers of anti-AVA antibodies but not anti-Spore antibodies existed in the AVA-immunized group. IgG1 and IgG2 were the major subtypes of IgG in both of the two groups. However, the IgG2a level was significantly higher in the A16R group than in the AVA group. At the cellular level, responses of antigen-specific TH2, TH1 and plasma cells were detected. The peripheral T(H)2 responses could be seen on day 5 after vaccination, and remained at a high level throughout the experiment (from day 5 post primary immunization to day 60 post the tertiary immunization); the T(H)1 responses to A16R vaccine appeared on day 5, while the responses to AVA could only be detected by day 7 after the secondary immunization; a low level of T(H)1 responses could be observed at the end of the experiment. Antigen-specific plasma cells could be found in the peripheral blood of both the immunized groups, however, the responses in the A16R group appeared earlier, lasted longer, and shown an ascending tendency until the end of the experiment when the plasma cell responses in the AVA group were reduced to a very low level. The results suggest that the multiple antigen containing A16R live spore vaccine induces better immune responses than AVA. Combined with serum antibody titers, T(H)2, T(H)1 and plasma cell responses could be used as immunological parameters for the evaluation of vaccine efficacy. These findings may afford new insight into the early evaluation of vaccination as well as being a powerful strategy for vaccine development.
Collapse
Affiliation(s)
- Jin Lü
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | | | | | | | | |
Collapse
|
50
|
Bandurska K, Brodzik R, Spitsin S, Kohl T, Portocarrero C, Smirnov Y, Pogrebnyak N, Sirko A, Koprowski H, Golovkin M. Plant-produced hepatitis B core protein chimera carrying anthrax protective antigen domain-4. Hybridoma (Larchmt) 2008; 27:241-7. [PMID: 18707542 DOI: 10.1089/hyb.2008.0008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The hepatitis B core antigen (HBcAg) can generate a strong immune response and is recognized as an effective carrier for foreign epitopes. The domain-4 epitope of the anthrax protective antigen (PA-D4) plays an essential role in generating protective immunity against virulent Bacillus anthracis. Here we report the successful production of a recombinant protein comprised of the antigenic PA-D4 integrated into the c/e1 loop of HBcAg in transgenic low-alkaloid Nicotiana tabacum. Sera of mice injected with the plant-derived purified HB/PA-D4 protein exhibited significant anti-PA- and anti-HBcAg-specific IgG titers; however, formation of virus-like particles (VLP) was not observed. These data support the feasibility of producing complex protein chimeras in plants.
Collapse
Affiliation(s)
- Katarzyna Bandurska
- Biotechnology Foundation Laboratories, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|