Completed

Evaluation of Tolerability and Safety of a Recombinant Purified HIV Envelope Vaccine

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What is being tested

Data Collection

Who is being recruted

Blood-Borne Infections
+11

+ Urogenital Diseases
+ Genital Diseases
Over 18 Years
See all eligibility criteria
How is the trial designed

Prevention Study

Phase 1
Interventional
Study Start: August 2003
See protocol details

Summary

Principal SponsorNational Institute of Allergy and Infectious Diseases (NIAID)
Last updated: January 14, 2026
Sourced from a government-validated database.Claim as a partner
Study start date: August 1, 2003Actual date on which the first participant was enrolled.

EnvPro is a recombinant, purified envelope protein vaccine with an aluminum hydroxide (alum) adjuvant. Aluminum hydroxide is licensed as an adjuvant in other vaccines, such as the hepatitis B vaccine. This study will examine the safety and tolerability of EnvPro with alum adjuvant in healthy, HIV uninfected adults. All participants in this study will receive vaccine injections in the upper arm muscle. Participants will receive a second vaccine injection eight weeks after the first injection. Blood tests will be performed at study visits before the vaccine is given, during the eight weeks between injections, and at selected times for up to three years after the vaccine is given.

Official TitleEvaluation of Tolerability and Safety of a Recombinant Purified HIV Envelope Vaccine 
NCT00076947P01AI045142-04
Principal SponsorNational Institute of Allergy and Infectious Diseases (NIAID)
Last updated: January 14, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.
Design Details
10 patients to be enrolledTotal number of participants that the clinical trial aims to recruit.
Prevention Study
Prevention studies aim to stop a disease from developing. They often involve people at risk and test things like vaccines, lifestyle changes, or preventive medications.

How participants are assigned to different groups/arms
In this clinical study, participants are assigned to groups based on specific criteria, such as their medical history or a doctor's recommendation. This approach ensures that treatments are given to those who may benefit the most, based on known factors.

Other Ways to Assign Participants
Randomized allocation: Participants are assigned randomly, like flipping a coin, to ensure fairness and reduce bias.
None (Single-arm trial): If the study has only one group, all participants receive the same treatment, and no allocation is needed.

How treatments are given to participants
In this study, all participants receive the same treatment. This approach is often used to evaluate the effects of a single intervention without comparing it to another.

Other Ways to Assign Treatments
Parallel assignment: Participants are split into separate groups, each receiving a different treatment.
Cross-over assignment: Participants switch between treatments during the study.
Factorial assignment: Participants receive different combinations of treatments.
Sequential assignment: Participants receive treatments one after another in a specific order, possibly based on individual responses.
Other assignment: Treatment assignment does not follow a standard or predefined design.

How the interventions assigned to participants is kept confidential
Everyone involved in the study knows which treatment is being given. This is typically used when it's not possible or necessary to hide the treatment details from participants or researchers.

Other Ways to Mask Information
Single-blind: Participants do not know which treatment they are receiving, but researchers do.
Double-blind: Neither participants nor researchers know which treatment is given.
Triple-blind: Participants, researchers, and outcome assessors do not know which treatment is given.
Quadruple-blind: Participants, researchers, outcome assessors, and care providers all do not know which treatment is given.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria
Any sexBiological sex of participants that are eligible to enroll.
Over 18 YearsRange of ages for which participants are eligible to join.
Healthy volunteers allowedIf individuals who are healthy and do not have the condition being studied can participate.
Conditions
Pathology
Blood-Borne Infections
Urogenital Diseases
Genital Diseases
Communicable Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Infections
Retroviridae Infections
RNA Virus Infections
Sexually Transmitted Diseases
Virus Diseases
Sexually Transmitted Diseases, Viral
HIV Infections
Lentivirus Infections
Criteria

Inclusion Criteria: * HIV uninfected * Normal medical history and physical exam * Normal complete blood count * Normal liver function * Normal renal function * Normal serum creatine phosphokinase (CPK) * Availability for at least 1 year follow-up Exclusion Criteria: * History of immunosuppressive illness, chronic illness, or use of any immunosuppressive medications * Medical or psychiatric condition or occupational responsibilities which preclude compliance with the study * Live attenuated vaccines within 60 days of study entry * Use of experimental agents within 30 days of study entry

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.
This study has 1 location
Suspended
St. Jude Children's Research HospitalMemphis, United StatesSee the location
CompletedOne Study Center
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