Abstract:
:Multiple approaches utilizing viral and DNA vectors have shown promise in the development of an effective vaccine against HIV. In this study, an alternative replication-defective flavivirus vector, RepliVax (RV), was evaluated for the delivery of HIV-1 immunogens. Recombinant RV-HIV viruses were engineered to stably express clade C virus Gag and Env (gp120TM) proteins and propagated in Vero helper cells. RV-based vectors enabled efficient expression and correct maturation of Gag and gp120TM proteins, were apathogenic in a sensitive suckling mouse neurovirulence test, and were similar in immunogenicity to recombinant poxvirus NYVAC-HIV vectors in homologous or heterologous prime-boost combinations in mice. In a pilot NHP study, immunogenicity of RV-HIV viruses used as a prime or boost for DNA or NYVAC candidates was compared to a DNA prime/NYVAC boost benchmark scheme when administered together with adjuvanted gp120 protein. Similar neutralizing antibody titers, binding IgG titers measured against a broad panel of Env and Gag antigens, and ADCC responses were observed in the groups throughout the course of the study, and T cell responses were elicited. The entire data demonstrate that RV vectors have the potential as novel HIV-1 vaccine components for use in combination with other promising candidates to develop new effective vaccination strategies.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Giel-Moloney M,Esteban M,Oakes BH,Vaine M,Asbach B,Wagner R,Mize GJ,Spies AG,McElrath J,Perreau M,Roger T,Ives A,Calandra T,Weiss D,Perdiguero B,Kibler KV,Jacobs B,Ding S,Tomaras GD,Montefiori DC,Ferrari G,Yatesdoi
10.1038/s41598-019-56550-4subject
Has Abstractpub_date
2019-12-27 00:00:00pages
20005issue
1issn
2045-2322pii
10.1038/s41598-019-56550-4journal_volume
9pub_type
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