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Efficacy testing of recombinant human immunodeficiency virus (HIV) gp160 as a therapeutic vaccine in early-stage HIV-1-infected volunteers

  • Deborah L. Birx*
  • , Lawrence D. Loomis-Price
  • , Naomi Aronson
  • , John Brundage
  • , Charles Davis
  • , Lawrence Deyton
  • , Robin Garner
  • , Fred Gordin
  • , David Henry
  • , William Holloway
  • , Thomas Kerkering
  • , Roberta Luskin-Hawk
  • , John McNeil
  • , Nelson Michael
  • , Phillip Foster Pierce
  • , Donald Poretz
  • , Silvia Ratto-Kim
  • , Phil Renzullo
  • , Nancy Ruiz
  • , Karl Sitz
  • Gale Smith, Carol Tacket, Melanie Thompson, Edmond Tramont, Bienvenido Yangco, Robert Yarrish, Robert R. Redfield
*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

A phase II efficacy trial was conducted with recombinant human immunodeficiency virus (HIV) type 1 envelope glycoprotein gp160 (rgp160) in 608 HIV-infected, asymptomatic volunteers with CD4+ cell counts >400 cells/mm3. During a 5-year study, volunteers received a 6-shot primary series of immunizations with either rgp160 or placebo over 6 months, followed by booster immunizations every 2 months. Repeated vaccination with rgp160 was safe and persistently immunogenic. Adequate follow-up and acquisition of endpoints allowed for definitive interpretation of the trial results. There was no evidence that rgp160 has efficacy as a therapeutic vaccine in early- stage HIV infection, as measured at primary endpoints (50% decline in CD4+ cell count or disease progression to Walter Reed stage 4, 5, or 6) or secondary endpoints. A transient improvement was seen in the secondary CD4 endpoint for the vaccination compared with the placebo arm, but this did not translate into improved clinical outcome.

Original languageEnglish
Pages (from-to)881-889
Number of pages9
JournalJournal of Infectious Diseases
Volume181
Issue number3
DOIs
StatePublished - 2000

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