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Matthews QL, Fatima A, Tang Y, Perry BA, Tsuruta Y, Komarova S, Timares L, Zhao C, Makarova N, Borovjagin AV, Stewart PL, Wu H, Blackwell JL, Curiel DT. HIV antigen incorporation within adenovirus hexon hypervariable 2 for a novel HIV vaccine approach. PLoS One 2010; 5:e11815. [PMID: 20676400 PMCID: PMC2910733 DOI: 10.1371/journal.pone.0011815] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Accepted: 06/27/2010] [Indexed: 11/18/2022] Open
Abstract
Adenoviral (Ad) vectors have been used for a variety of vaccine applications including cancer and infectious diseases. Traditionally, Ad-based vaccines are designed to express antigens through transgene expression of a given antigen. However, in some cases these conventional Ad-based vaccines have had sub-optimal clinical results. These sub-optimal results are attributed in part to pre-existing Ad serotype 5 (Ad5) immunity. In order to circumvent the need for antigen expression via transgene incorporation, the “antigen capsid-incorporation” strategy has been developed and used for Ad-based vaccine development in the context of a few diseases. This strategy embodies the incorporation of antigenic peptides within the capsid structure of viral vectors. The major capsid protein hexon has been utilized for these capsid incorporation strategies due to hexon's natural role in the generation of anti-Ad immune response and its numerical representation within the Ad virion. Using this strategy, we have developed the means to incorporate heterologous peptide epitopes specifically within the major surface-exposed domains of the Ad capsid protein hexon. Our study herein focuses on generation of multivalent vaccine vectors presenting HIV antigens within the Ad capsid protein hexon, as well as expressing an HIV antigen as a transgene. These novel vectors utilize HVR2 as an incorporation site for a twenty-four amino acid region of the HIV membrane proximal ectodomain region (MPER), derived from HIV glycoprotein gp41 (gp41). Our study herein illustrates that our multivalent anti-HIV vectors elicit a cellular anti-HIV response. Furthermore, vaccinations with these vectors, which present HIV antigens at HVR2, elicit a HIV epitope-specific humoral immune response.
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Affiliation(s)
- Qiana L. Matthews
- Division of Human Gene Therapy, Departments of Medicine, Pathology, Surgery, Obstetrics and Gynecology, and the Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Center for AIDS Research, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Aiman Fatima
- Division of Human Gene Therapy, Departments of Medicine, Pathology, Surgery, Obstetrics and Gynecology, and the Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Yizhe Tang
- Division of Human Gene Therapy, Departments of Medicine, Pathology, Surgery, Obstetrics and Gynecology, and the Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Vision Science Graduate Program, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Brian A. Perry
- Davidson College, Davidson, North Carolina, United States of America
| | - Yuko Tsuruta
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Svetlana Komarova
- Division of Human Gene Therapy, Departments of Medicine, Pathology, Surgery, Obstetrics and Gynecology, and the Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Laura Timares
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Chunxia Zhao
- Emory University, Atlanta, Georgia, United States of America
| | | | - Anton V. Borovjagin
- Institute of Oral Health Research, University of Alabama at Birmingham, School of Dentistry, Birmingham, Alabama, United States of America
| | - Phoebe L. Stewart
- Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Hongju Wu
- Division of Human Gene Therapy, Departments of Medicine, Pathology, Surgery, Obstetrics and Gynecology, and the Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | | | - David T. Curiel
- Division of Human Gene Therapy, Departments of Medicine, Pathology, Surgery, Obstetrics and Gynecology, and the Gene Therapy Center, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail:
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Vaccination with an adenoviral vector that encodes and displays a retroviral antigen induces improved neutralizing antibody and CD4+ T-cell responses and confers enhanced protection. J Virol 2009; 84:1967-76. [PMID: 20007267 DOI: 10.1128/jvi.01840-09] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We present a new type of adenoviral vector that both encodes and displays a vaccine antigen on the capsid, thus combining in itself gene-based and protein vaccination; this vector resulted in an improved vaccination outcome in the Friend virus (FV) model. For presentation of the envelope protein gp70 of Friend murine leukemia virus on the adenoviral capsid, gp70 was fused to the adenovirus capsid protein IX. When compared to vaccination with conventional FV Env- and Gag-encoding adenoviral vectors, vaccination with the adenoviral vector that encodes and displays pIX-gp70 combined with an FV Gag-encoding vector resulted in significantly improved protection against systemic FV challenge infection, with highly controlled viral loads in plasma and spleen. This improved protection correlated with improved neutralizing antibody titers and stronger CD4(+) T-cell responses. Using a vector that displays gp70 without encoding it, we found that while the antigen display on the capsid alone was sufficient to induce high levels of binding antibodies, in vivo expression was necessary for the induction of neutralizing antibodies. This new type of adenovirus-based vaccine could be a valuable tool for vaccination.
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Chapman NM, Kim KS, Tracy S, Jackson J, Höfling K, Leser JS, Malone J, Kolbeck P. Coxsackievirus expression of the murine secretory protein interleukin-4 induces increased synthesis of immunoglobulin G1 in mice. J Virol 2000; 74:7952-62. [PMID: 10933703 PMCID: PMC112326 DOI: 10.1128/jvi.74.17.7952-7962.2000] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/1999] [Accepted: 06/08/2000] [Indexed: 11/20/2022] Open
Abstract
We cloned the sequence encoding murine interleukin-4 (mIL-4), including the secretory signal, into the genome of CVB3/0, an artificially attenuated strain of coxsackievirus B3, at the junction of the capsid protein 1D and the viral protease 2Apro. Two strains of chimeric CVB3 were constructed using, in one case, identical sequences to encode 2Apro cleavage sites (CVB3/0-mIL4/47) on either side of the inserted coding sequence and, in the other case, nonidentical sequences that varied at the nucleotide level without changing the amino acid sequences (CVB3-PL2-mIL4/46). Transfection of HeLa cells yielded progeny viruses that replicated with rates similar to that of the parental CVB3/0 strain, although yields of mIL-4-expressing strains were approximately 10-fold lower than those of the parental virus. Western blot analysis of viral proteins isolated from HeLa cells inoculated with either strain of chimeric virus demonstrated that the chimeric viruses synthesized capsid protein 1D at approximately twofold-higher levels than the parental virus. mIL-4 protein was detected by enzyme-linked immunosorbent assay (ELISA) in HeLa cells inoculated with either strain of chimeric virus. Lysates of HeLa cells inoculated with either chimeric virus induced the proliferation of the mIL-4-requiring murine MC-9 cell line, demonstrating biological activity of the CVB3-expressed mIL-4. Reverse transcription (RT)-PCR analysis of viral RNA derived from sequential passaging of CVB3/0-mIL4/47 in HeLa cells demonstrated deletion of the mIL-4 coding sequence occurring by the fourth passage, while similar analysis of CVB3-PL2-mIL4/46 RNA demonstrated detection of the mIL-4 coding sequence in the virus population through 10 generations in HeLa cells. mIL-4 protein levels determined by ELISA were consistent with the stability and loss data determined by RT-PCR analysis of the passaged viral genomes. Studies of insert stability of CVB3-PL2-mIL4/46 during replication in mice showed the presence of the viral mIL-4 insert in pancreas, heart, and liver at 14 days postinfection. Comparison of the murine antibody responses to CVB3-PL2-mIL4/46 and the parental CVB3/0 strain demonstrated an increased level of CVB3-binding serum immunoglobulin G1 in mice inoculated with CVB3-PL2-mIL4/46.
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Affiliation(s)
- N M Chapman
- Enterovirus Research Laboratory, Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska 68198, USA.
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