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Stephenson KE, Keefer MC, Bunce CA, Frances D, Abbink P, Maxfield LF, Neubauer GH, Nkolola J, Peter L, Lane C, Park H, Verlinde C, Lombardo A, Yallop C, Havenga M, Fast P, Treanor J, Barouch DH. First-in-human randomized controlled trial of an oral, replicating adenovirus 26 vector vaccine for HIV-1. PLoS One 2018; 13:e0205139. [PMID: 30427829 PMCID: PMC6235250 DOI: 10.1371/journal.pone.0205139] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [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: 07/07/2018] [Accepted: 09/04/2018] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Live, attenuated viral vectors that express HIV-1 antigens are being investigated as an approach to generating durable immune responses against HIV-1 in humans. We recently developed a replication-competent, highly attenuated Ad26 vector that expresses mosaic HIV-1 Env (rcAd26.MOS1.HIV-Env, "rcAd26"). Here we present the results of a first-in-human, placebo-controlled clinical trial to test the safety, immunogenicity and mucosal shedding of rcAd26 given orally. METHODS Healthy adults were randomly assigned to receive a single oral dose of vaccine or placebo at 5:1 ratio in a dosage escalation of 10^8 to 10^11 rcAd26 VP (nominal doses) at University of Rochester Medical Center, Rochester, NY, USA. Participants were isolated and monitored for reactogenicity for 10 days post-vaccination, and adverse events were recorded up to day 112. Rectal and oropharyngeal secretions were evaluated for shedding of the vaccine. Humoral and cellular immune responses were measured. Household contacts were monitored for secondary vaccine transmission. RESULTS We enrolled 22 participants and 11 household contacts between February 7 and June 24, 2015. 18 participants received one dose of HIV-1 vaccine and 4 participants received placebo. The vaccine caused only mild to moderate adverse events. No vaccine-related SAEs were observed. No infectious rcAd26 viral particles were detected in rectal or oropharyngeal secretions from any participant. Env-specific ELISA and ELISPOT responses were undetectable. No household contacts developed vaccine-induced HIV-1 seropositivity or vaccine-associated illness. CONCLUSIONS The highly attenuated rcAd26.MOS1.HIV-Env vaccine was well tolerated up to 10^11 VP in healthy, HIV-1-uninfected adults, though the single dose was poorly immunogenic suggesting the replicative capacity of the vector was too attenuated. There was no evidence of shedding of infectious virus or secondary vaccine transmission following the isolation period. These data suggest the use of less attenuated viral vectors in future studies of live, oral HIV-1 vaccines. TRIAL REGISTRATION ClinicalTrials.gov NCT02366013.
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Affiliation(s)
- Kathryn E. Stephenson
- Center for Virology and Vaccine Research, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts, United States of America
| | - Michael C. Keefer
- University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Catherine A. Bunce
- University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Doreen Frances
- University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Peter Abbink
- Center for Virology and Vaccine Research, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Lori F. Maxfield
- Center for Virology and Vaccine Research, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - George H. Neubauer
- Center for Virology and Vaccine Research, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Joseph Nkolola
- Center for Virology and Vaccine Research, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Lauren Peter
- Center for Virology and Vaccine Research, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Christopher Lane
- University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Harriet Park
- International AIDS Vaccine Initiative, New York, New York, United States of America
| | - Carl Verlinde
- International AIDS Vaccine Initiative, New York, New York, United States of America
| | - Angela Lombardo
- International AIDS Vaccine Initiative, New York, New York, United States of America
| | | | | | - Patricia Fast
- International AIDS Vaccine Initiative, New York, New York, United States of America
| | - John Treanor
- University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, New York, United States of America
| | - Dan H. Barouch
- Center for Virology and Vaccine Research, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- Harvard Medical School, Boston, Massachusetts, United States of America
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts, United States of America
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Haut LH, Gill AL, Kurupati RK, Bian A, Li Y, Giles-Davis W, Xiang Z, Zhou XY, Ertl HCJ. A Partial E3 Deletion in Replication-Defective Adenoviral Vectors Allows for Stable Expression of Potentially Toxic Transgene Products. Hum Gene Ther Methods 2016; 27:187-196. [PMID: 27604324 DOI: 10.1089/hgtb.2016.044] [Citation(s) in RCA: 2] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Adenovirus (Ad) is used extensively for construction of viral vectors, most commonly with deletion in its E1 and/or E3 genomic regions. Previously, our attempts to insert envelope proteins (Env) of HIV-1 into such vectors based on chimpanzee-derived Ad (AdC) viruses were thwarted. Here, we describe that genetic instability of an E1- and E3-deleted AdC vector of serotype C6 expressing Env of HIV-1 can be overcome by reinsertion of E3 sequences with anti-apoptotic activities. This partial E3 deletion presumably delays premature death of HEK-293 packaging cell lines due to Env-induced cell apoptosis. The same partial E3 deletion also allows for the generation of stable glycoprotein 140 (gp140)- and gp160-expressing Ad vectors based on AdC7, a distinct AdC serotype. Env-expressing AdC vectors containing the partial E3 deletion are genetically stable upon serial cell culture passaging, produce yields comparable to those of other AdC vectors, and induce transgene product-specific antibody responses in mice. A partial E3 deletion thereby allows expansion of the repertoire of transgenes that can be expressed by Ad vectors.
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Affiliation(s)
| | - Amanda L Gill
- 1 The Wistar Institute , Philadelphia, Pennsylvania
- 2 Current address: Clinical Molecular Regulation Section/Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health , Bethesda, Maryland
| | | | - Ang Bian
- 1 The Wistar Institute , Philadelphia, Pennsylvania
| | - Yan Li
- 1 The Wistar Institute , Philadelphia, Pennsylvania
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Joshi A, Garg H, Ablan S, Freed EO, Nagashima K, Manjunath N, Shankar P. Targeting the HIV entry, assembly and release pathways for anti-HIV gene therapy. Virology 2011; 415:95-106. [PMID: 21529874 DOI: 10.1016/j.virol.2011.03.028] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 03/29/2011] [Accepted: 03/30/2011] [Indexed: 01/31/2023]
Abstract
Targeting the HIV entry and assembly pathways holds promise for development of novel anti-HIV gene therapy vectors. We characterized discrete dominant negative (DN) Gag and Envelope mutants for their anti-HIV-1 activity. We show here that capsid mutants (Q155N and Y164A) are more potent inhibitors of WT HIV than the matrix mutant 1GA. Both the Envelope mutants tested, V513E and R515A, were equally effective and a combination of Gag and Envelope DN genes significantly enhanced potency. Interestingly, the DN mutants acted at multiple steps in the virus life cycle rather than solely disrupting virus release or infection. Inhibition mediated by R515A could be partially attributed to the Envelope cytoplasmic tail, as deletion of R515A tail partially abrogated its DN effect. Finally, the Y164A/R515A double mutant expressed in a lentiviral vector was effective at inhibiting HIV replication in CD34+ hematopoietic stem cell-derived macrophages, demonstrating the therapeutic potential of our approach.
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Affiliation(s)
- Anjali Joshi
- Center of Excellence for Infectious Disease, Department of Biomedical Sciences, Texas Tech University Health Sciences Center, El Paso, TX 79905, USA.
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