Investigation of V520 in an HIV Vaccine Proof-of-Concept Study (V520-023)

This study has been terminated.
Sponsor:
Collaborator:
HIV Vaccine Trials Network
Information provided by (Responsible Party):
Merck Sharp & Dohme Corp.
ClinicalTrials.gov Identifier:
NCT00095576
First received: November 5, 2004
Last updated: October 8, 2014
Last verified: October 2014
  Purpose

This study will test the safety and efficacy of an investigational Human Immunodeficiency Virus (HIV) vaccine. Efficacy will be measured by either prevention of HIV infection or control of HIV viral load in subjects who become HIV infected.

On September 18, 2007 the Protocol V520-023 DSMB (Data & Safety Monitoring Board) reviewed data from a planned interim analysis. These data demonstrated that the investigational vaccine candidate was not effective, and all vaccinations in the study were halted.

Participants were encouraged to continue to come to the clinic for scheduled visits and ongoing risk reduction counseling since the vaccine was not effective.


Condition Intervention Phase
AIDS
HIV Infections
Biological: Trivalent MRKAd5 HIV-1 gag/pol/nef (1.5x10^10 ad-vg/dose)
Drug: Comparator: placebo
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Prevention
Official Title: A Multicenter, Double-Blind, Randomized, Placebo-Controlled Phase II Proof-of-Concept Study to Evaluate the Safety and Efficacy of a 3-Dose Regimen of the Merck Adenovirus Serotype 5 HIV-1 Gag/Pol/Nef Vaccine (MRK AD5 HIV-1 Gag/Pol/Nef) in Adults at High Risk of HIV-1 Infection

Resource links provided by NLM:


Further study details as provided by Merck Sharp & Dohme Corp.:

Primary Outcome Measures:
  • Number of Participants With Clinical Adverse Experiences [ Time Frame: Day 1 to End of Study (Week 210 for HIV uninfected participants and Week 338 for HIV infected participants) ] [ Designated as safety issue: Yes ]

    Number of participants with non-serious AEs with an incidence cut-off of 5% (>5% in at least one treatment group) and number of participants with >1 SAE following administration of study vaccine.

    AEs collected include serious and non-serious systemic AEs, and injection-site AEs. All systemic AEs were collected up to 14 days after any vaccine dose, and serious AEs were collected for the entire study period (up to Week 210).

    Injection-site AEs are any swelling, redness, pain or tenderness at the injection site. All injection site AEs were collected up to Day 4 after any vaccine dose.


  • Number of Participants With Laboratory Adverse Experiences [ Time Frame: Day 1 to Week 208 ] [ Designated as safety issue: Yes ]

    Number of participants with laboratory adverse experiences with an incidence cut-off of 5% (events occurring > 5% in at least one treatment group) following administration of the first dose of study vaccine.

    Laboratory AEs were based on a grading system considering the severity of abnormal laboratory values in participants and reflect any unfavorable and unintentional change in function, or chemistry of the body.

    All laboratory AEs were collected up to 14 days after any vaccine dose.


  • Number of Participants With HIV-1 Infections [ Time Frame: Day 1 to End of Study (Week 210 for HIV uninfected participants and Week 338 for HIV infected participants) ] [ Designated as safety issue: Yes ]
    The number of participants with HIV-1 infections was to be determined with a periodic HIV-1 screening test to detect antibodies to recombinant HIV-1 envelope protein in the participants' serum.

  • HIV-1 Viral Load in Infected Participants [ Time Frame: Day 1 to End of Study (Week 210 for HIV uninfected participants and Week 338 for HIV infected participants) ] [ Designated as safety issue: Yes ]
    Plasma HIV-1 viral RNA was to be measured using a ribonucleic acid polymerase chain reaction (RNA PCR) on the last archived sample, and at Weeks 1, 2, 8, 12, and 26 post-HIV-1 infection, and subsequently every 6 months.


Enrollment: 3000
Study Start Date: November 2004
Study Completion Date: September 2009
Primary Completion Date: September 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Trivalent MRKAd5 HIV-1 gag/pol/nef
Participants randomized to receive three 1.0-ml intramuscular (IM) injections of Merck Trivalent Adenovirus Serotype 5 HIV-1 gag/pol/nef (MRKAd5 HIV-1 gag/pol/nef) Vaccine at a dose of 1.5x10^10 adenovirus genomes (Ad vg) per dose at Day 1, Week 4, and Week 26.
Biological: Trivalent MRKAd5 HIV-1 gag/pol/nef (1.5x10^10 ad-vg/dose)

Trivalent MRKAd5 HIV-1 gag/pol/nef (1.5x10^10 adenovirus genomes [ad-vg]/dose).

This dose is equivalent to 3x10^10 vp/dose used in study V520-016.

Other Name: V520
Placebo Comparator: Placebo
Participants randomized to receive three 1.0-ml intramuscular (IM) injections of placebo to MRKAd5 HIV-1 gag/pol/nef at Day 1, Week 4, and Week 26.
Drug: Comparator: placebo
Placebo to Trivalent MRKAd5 HIV-1 gag/pol/nef in three 1 mL doses at Day 1, Week 4, and Week 26 administered intramuscularly.

Detailed Description:

No further treatment was given in V520-023, however participants were followed. V520-023 protocol ended earlier than originally planned per protocol and participants (HIV infected and uninfected) had the option of participating in an observational long term follow up protocol called V520-030/HVTN 504, which served as an extension of V520-023 and would continue through the end of 2009.

  Eligibility

Ages Eligible for Study:   18 Years to 45 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Healthy, HIV seronegative adults at high risk of acquiring HIV infection
  • Cannot have previously received an investigational vaccine

Exclusion Criteria:

  • In a monogamous relationship with an HIV-1 seronegative partner for > 1 year
  • History of anaphylaxis and/or allergy to vaccine components, including Tris buffer, MgCl2, and polysorbate 80 (TWEEN)
  • Received an immune globulin or blood derived products 3 months before injection with the first dose of vaccine/placebo or scheduled within 14 days after injection
  • Previously vaccinated with a live virus vaccine within 30 days before injection with the first dose of vaccine or scheduled within 14 days after injection
  • Previously vaccinated with an inactivated vaccine within 5 days before injection with the first dose of vaccine or scheduled within 14 days after injection
  • Known history of immunodeficiency
  • History of malignancy (with some exceptions)
  • Contraindication to intramuscular (IM) injection such as anticoagulant therapy or thrombocytopenia
  • Female subject who is pregnant or breast feeding, or expecting to conceive or donate eggs through Week 30 of the study
  • Male subject who is planning to impregnate or provide sperm donation through Week 30 of the study
  • Previously received an investigational HIV vaccine
  • Has active drug or alcohol abuse or dependence that would interfere with adherence to study requirements, or endanger the subject's health while on the study
  • Has a condition that might endanger the subject's health or interfere with the evaluation of the study objectives
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00095576

Sponsors and Collaborators
Merck Sharp & Dohme Corp.
HIV Vaccine Trials Network
Investigators
Study Director: Medical Monitor Merck Sharp & Dohme Corp.
  More Information

Publications:
Additional publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Responsible Party: Merck Sharp & Dohme Corp.
ClinicalTrials.gov Identifier: NCT00095576     History of Changes
Obsolete Identifiers: NCT00770549
Other Study ID Numbers: V520-023, 2004_091
Study First Received: November 5, 2004
Results First Received: July 20, 2011
Last Updated: October 8, 2014
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Acquired Immunodeficiency Syndrome
Communicable Diseases
HIV Infections
Infection
Immune System Diseases
Immunologic Deficiency Syndromes
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Sexually Transmitted Diseases
Sexually Transmitted Diseases, Viral
Slow Virus Diseases
Virus Diseases

ClinicalTrials.gov processed this record on October 21, 2014