Protective efficacy of adenovirus/protein vaccines against SIV challenges in rhesus monkeys

Dan H. Barouch, Galit Alter, Thomas Broge, Caitlyn Linde, Margaret E. Ackerman, Eric P. Brown, Erica N. Borducchi, Kaitlin M. Smith, Joseph P. Nkolola, Jinyan Liu, Jennifer Shields, Lily Parenteau, James B. Whitney, Peter Abbink, David M. Ng'ang'a, Michael S. Seaman, Christy L. Lavine, James R. Perry, Wenjun Li, Arnaud D. ColantonioMark G. Lewis, Bing Chen, Holger Wenschuh, Ulf Reimer, Michael Piatak, Jeffrey D. Lifson, Scott A. Handley, Herbert W. Virgin, Marguerite Koutsoukos, Clarisse Lorin, Gerald Voss, Mo Weijtens, Maria G. Pau, Hanneke Schuitemaker

Research output: Contribution to journalArticlepeer-review

232 Scopus citations


Preclinical studies of viral vector-based HIV-1 vaccine candidates have previously shown partial protection against neutralization-resistant virus challenges in rhesus monkeys. In this study, we evaluated the protective efficacy of adenovirus serotype 26 (Ad26) vector priming followed by purified envelope (Env) glycoprotein boosting. Rhesus monkeys primed with Ad26 vectors expressing SIVsmE543 Env, Gag, and Pol and boosted with AS01B-adjuvanted SIVmac32H Env gp140 demonstrated complete protection in 50% of vaccinated animals against a series of repeated, heterologous, intrarectal SIVmac251 challenges that infected all controls. Protective efficacy correlated with the functionality of Env-specific antibody responses. Comparable protection was also observed with a similar Ad/Env vaccine against repeated, heterologous, intrarectal SHIV-SF162P3 challenges. These data demonstrate robust protection by Ad/Env vaccines against acquisition of neutralization-resistant virus challenges in rhesus monkeys.

Original languageEnglish
Pages (from-to)320-324
Number of pages5
Issue number6245
StatePublished - Jul 17 2015


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