CClinicalTrials.gg
CompletedNCT00000755Updated Nov 4, 2021

A Phase I/II Trial of Vaccine Therapy of HIV-1 Infected Individuals With 50-500 CD4 Cells/mm3

A Phase 1 interventional study of rgp120/HIV-1MN and Zidovudine in HIV Infections, sponsored by National Institute of Allergy and Infectious Diseases (NIAID). Completed at 10 sites in United States. Open to participants aged 13 Years and older. Per ClinicalTrials.gov, last updated 2021-11-04.

Sponsored by National Institute of Allergy and Infectious Diseases (NIAID) · Phase 1, Interventional, and Prevention

Phase
Phase 1
Study type
Interventional
Enrollment
168
Ages
13 Years and older
Sex
All
01

Study summary

To examine the response of HIV-1 infected patients to vaccination with gp120/HIV-1MN antigen. To determine the effect of antiretroviral therapy on vaccine responsiveness.

Fifty percent of HIV-1 infected individuals remain symptom free for 8-12 years. It has been hypothesized that HIV-specific immune responses are responsible for the period of relative quiescence of viral replication. Recent studies suggest that these immune functions can be augmented by vaccination with HIV-derived antigens.

Read the detailed description

Fifty percent of HIV-1 infected individuals remain symptom free for 8-12 years. It has been hypothesized that HIV-specific immune responses are responsible for the period of relative quiescence of viral replication. Recent studies suggest that these immune functions can be augmented by vaccination with HIV-derived antigens.

Patients are randomized to receive rgp120/HIV-1MN vaccine or alum adjuvant placebo by intramuscular injection at weeks 0, 4, 8, 12, 16, and 20, with or without daily oral zidovudine (AZT) or their current stable dose of antiretroviral therapy. After completing the primary vaccination series, patients are permitted to continue into an extension phase, in which they receive a booster vaccination at weeks 28, 36, and 44. Patients will be stratified by CD4 count: 350-500, 200-349, and 50-199 cells/mm3. A fourth group with counts of 350-500 cells/mm3 will serve as a pilot group and receive vaccine only.

02

Conditions studied

  • HIV Infections

Browse trials for

Keywords

  • Vaccines, Synthetic
  • HIV-1
  • Acquired Immunodeficiency Syndrome
  • AIDS-Related Complex
  • Zidovudine
  • HIV Envelope Protein gp120
  • AIDS Vaccines
  • HIV Therapeutic Vaccine
03

In context

HIV Infections

4,258 studies on the registry are indexed under HIV Infections; 240 are open to participants now.

This study's enrollment of 168 is above the median of 83 across 3,251 interventional studies indexed under HIV Infections.

Browse HIV Infections studies →

Lead sponsor

National Institute of Allergy and Infectious Diseases (NIAID) is the lead sponsor of 2,401 studies on the registry; 179 are open to participants now.

Of its 396 completed or terminated interventional studies of FDA-regulated products, 294 (74%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
13 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

Required immediately prior to study entry:

  • A minimum of 2 and a maximum of 12 months of AZT therapy at 500-600 mg/day (does not apply to the pilot group patients receiving vaccine only and to patients with CD4 counts of 50-199 cells/mm3).

Concurrent Medication:

Allowed:

  • PCP prophylaxis.
  • Rifabutin and clarithromycin (in patients with CD4 counts of 50-199 cells/mm3 only).
  • Short-term nonsteroidal anti-inflammatory therapy for acute conditions.
  • Short intermittent cycles of acyclovir.

Patients must have:

  • HIV infection, with CD4 count of 50-500 cells/mm3.
  • No active opportunistic infection (patients with CD4 counts of 50-199 cells/mm3 may have a history of an opportunistic infection).
  • Consent of parent, guardian, or person with power of attorney, if less than 18 years of age.
  • B-cell lines established in order to be vaccinated.

Exclusion criteria

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms or conditions are excluded:

  • Known or suspected allergies to any vaccine components.

Concurrent Medication:

Excluded:

  • Agents with immunosuppressive activity.
  • Antiretroviral therapies other than AZT (except in patients with CD4 counts of 50-199 cells/mm3).
  • Interferon.
  • Parenteral therapies (including SC allergy medications and chemotherapy for Kaposi's sarcoma).
  • Steroids.
  • Hematopoietins.

Prior Medication:

Excluded within 12 weeks prior to study entry:

  • Agents with immunosuppressive activity.
  • Antiretroviral therapies other than AZT (except in patients with CD4 counts of 50-349 cells/mm3).
  • Interferon.
  • Parenteral therapies (including SC allergy medications and chemotherapy for Kaposi's sarcoma).
  • Steroids.
  • Hematopoietins.

Active drug abuse.

05

Study design

Phase
Phase 1
Primary purpose
Prevention
Intervention model
Parallel assignment
Enrollment
168 participants

Interventions

  • Biologicalrgp120/HIV-1MN
  • DrugZidovudine
06

Study locations

10 sites
  • UCLA CARE Center CRS
    Los Angeles, California 90095, United States
  • Stanford CRS
    Palo Alto, California 943055107, United States
  • Ucsf Aids Crs
    San Francisco, California 941102859, United States
  • University of Colorado Hospital CRS
    Aurora, Colorado 80262, United States
  • Massachusetts General Hospital ACTG CRS
    Boston, Massachusetts 02114, United States
  • Bmc Actg Crs
    Boston, Massachusetts 02118, United States
  • Beth Israel Deaconess - East Campus A0102 CRS
    Boston, Massachusetts 02215, United States
  • Beth Israel Deaconess Med. Ctr., ACTG CRS
    Boston, Massachusetts 02215, United States
  • NY Univ. HIV/AIDS CRS
    New York, New York 10016, United States
  • University of Washington AIDS CRS
    Seattle, Washington 981224304, United States
07

References and documents

Publications

  • Kuritzkes DR, Spino C, Valentine F, Schooley RT. Association of plasma HIV-1 RNA, CD4 count, and immune response in patients with 50-500 CD4 cells/ul. Conf Retroviruses Opportunistic Infect. 1997 Jan 22-26;4th:204 (abstract no 757)
  • Schooley RT, Spino C, Chiu S, DeGruttola V, Kuritzkes DR. Poor immunogenicity of HIV-1 envelope vaccines with alum or MF59 aduvant in HIV-infected individuals: results of two randomized trials. Conf Retroviruses Opportunistic Infect. 1997 Jan 22-26;4th:204 (abstract no 756)
  • Schooley RT, Spino C, Kuritzkes D, Walker BD, Valentine FA, Hirsch MS, Cooney E, Friedland G, Kundu S, Merigan TC Jr, McElrath MJ, Collier A, Plaeger S, Mitsuyasu R, Kahn J, Haslett P, Uherova P, deGruttola V, Chiu S, Zhang B, Jones G, Bell D, Ketter N, Twadell T, Chernoff D, Rosandich M. Two double-blinded, randomized, comparative trials of 4 human immunodeficiency virus type 1 (HIV-1) envelope vaccines in HIV-1-infected individuals across a spectrum of disease severity: AIDS Clinical Trials Groups 209 and 214. J Infect Dis. 2000 Nov;182(5):1357-64. doi: 10.1086/315860. Epub 2000 Oct 9. PubMed 11023459 ↗
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 4, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00000755
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
Collaborators
Genentech, Inc., Glaxo Wellcome
Responsible party
Sponsor
First posted
Aug 31, 2001
Completion
Mar 1993
Last update
Nov 4, 2021

Study contacts

Schooley RT
study chair
Walker B
study chair
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2021. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion