A Phase I Safety and Immunogenicity Study of HIV p17/p24:Ty-VLP in HIV-1 Seronegative Subjects

October 28, 2021 updated by: National Institute of Allergy and Infectious Diseases (NIAID)

To evaluate the safety and immunogenicity of HIV p17/p24:Ty-VLP (virus-like particles) vaccine in uninfected volunteers. Specifically, to determine whether the vaccine formulated with and without alum induces CD8+ cytotoxic T lymphocytes ( CTLs ) that may be cross-reactive against multiple HIV-1 stains. Also, to determine whether boosting with the vaccine orally or rectally will help induce mucosal antibody responses.

Induction of CD8+ CTL activity is considered a critical property for a candidate vaccine. Additionally, since the majority of HIV-1 infections occur after inoculation of a mucosal surface, it is desirable to induce mucosal immunity as well as systemic immunity. The HIV p17/p24:Ty-VLP vaccine may potentially induce both CTL and mucosal antibody responses against HIV-1.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Induction of CD8+ CTL activity is considered a critical property for a candidate vaccine. Additionally, since the majority of HIV-1 infections occur after inoculation of a mucosal surface, it is desirable to induce mucosal immunity as well as systemic immunity. The HIV p17/p24:Ty-VLP vaccine may potentially induce both CTL and mucosal antibody responses against HIV-1.

Volunteers receive HIV p17/p24:Ty-VLP vaccine or placebo by IM injection (with or without alum adjuvant) at months 0, 2, and 6, and then either by mouth or rectal enema at months 10 and 11. Volunteers who receive oral vaccine boosting will receive concurrent omeprazole to decrease stomach acid.

Study Type

Interventional

Enrollment (Actual)

36

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New York
      • Rochester, New York, United States, 14642
        • Univ. of Rochester AVEG

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria

Concurrent Medication: Required:

  • Omeprazole given concurrently in patients receiving the oral vaccine dose.

Volunteers must have:

  • HIV-1 negativity.
  • Normal history and physical exam.
  • Lower risk for HIV infection.
  • CD4 count >= 400 cells/mm3.
  • Normal urine dipstick with esterase and nitrite.

NOTE:

  • No more than 10 percent of volunteers may be over age 50.

Exclusion Criteria

Co-existing Condition:

Volunteers with the following conditions are excluded:

  • Positive for hepatitis B surface antigen.
  • Medical or psychiatric condition (including recent suicidal ideation or present psychosis) that precludes compliance.
  • Occupational responsibilities that preclude compliance.
  • Active syphilis (NOTE: If serology is documented to be a false positive or due to a remote (> 6 months) infection, subject is eligible).
  • Active tuberculosis (NOTE: Subjects with a positive PPD and normal x-ray showing no evidence of TB and who do not require INH therapy are eligible).

Volunteers with the following prior conditions are excluded:

  • History of immunodeficiency, chronic illness, malignancy, autoimmune disease, or use of immunosuppressive medications.
  • History of cancer unless surgically excised with reasonable assurance of cure.
  • History of suicide attempts or past psychosis.
  • History of anaphylaxis or other serious adverse reactions to vaccines.
  • History of serious allergic reaction requiring hospitalization or emergent medical care.

Prior Medication:

Excluded:

  • Prior HIV-1 vaccines or placebo in an HIV vaccine trial.
  • Live attenuated vaccines within the past 60 days. NOTE: Medically indicated subunit or killed vaccines (e.g., influenza, pneumococcal) do not exclude but should be administered at least 2 weeks prior to HIV immunizations.
  • Experimental agents within the past 30 days.

Prior Treatment: Excluded:

  • Blood products or immunoglobulin within the past 6 months.

Higher risk behavior for HIV infection as determined by screening questionnaire, including:

  • History of injection drug use within the past year.
  • Higher or intermediate risk sexual behavior.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Masking: Double

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

Investigators

  • Study Chair: Graham B
  • Study Chair: Spearman P

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Completion (Actual)

March 1, 1996

Study Registration Dates

First Submitted

November 2, 1999

First Submitted That Met QC Criteria

August 30, 2001

First Posted (Estimate)

August 31, 2001

Study Record Updates

Last Update Posted (Actual)

November 4, 2021

Last Update Submitted That Met QC Criteria

October 28, 2021

Last Verified

October 1, 2021

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • AVEG 019
  • 10569 (Registry Identifier: DAIDS ES Registry Number)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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