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Effectiveness of Giving an HIV Vaccine (Remune) to HIV-Positive Patients Receiving an Anti-HIV Drug Combination

28 oktober 2021 bijgewerkt door: National Institute of Allergy and Infectious Diseases (NIAID)

A Phase III, Randomized, Double-Blind, Placebo-Controlled Evaluation of the Effect of Immunization With an HIV Immunogen on the Time to Virologic Relapse in Individuals Receiving Potent, Suppressive Antiretroviral Therapies

The purpose of this study is to look at the effects of the HIV vaccine Remune on viral load (level of HIV in the blood) and on the way the immune system responds to HIV. This study will also try to see if the effects of the vaccine are different in patients entering the study with a viral load below 50 copies/ml compared to those who have a viral load from 50 to 500 copies/ml. (This study is currently being redesigned and the purpose may be revised.) Treatment with anti-HIV drugs does not always keep HIV viral load undetectable (so low that it cannot be measured). This study originally added an HIV vaccine called Remune to treat patients. Remune was thought to reduce viral load and improve immune responses. However, new information suggests that Remune may not be as effective as was first believed. The study has been changed to follow people already in the study and to let people enroll only if they participate in the substudy. The substudy will look at the effect of another HIV vaccine, vCP1452, on the immune response and how it works in combination with Remune. Information about the safety of these vaccines in HIV-positive patients will be gathered.

Studie Overzicht

Toestand

Voltooid

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Studies have shown that inactivated, gp120-depleted whole virus immunogen (Remune) boosts immune responses to HIV. One response, lymphocyte proliferative response (LPR) to p24, is correlated with a low viral load in some patients with long-term non-progression of disease. This study examines whether administering Remune vaccine may generate new immune responses or boost existing responses to keep the level of virus in the blood low for a longer period of time than antiretroviral therapy alone. [AS PER AMENDMENT 7/20/00: In a recent study using Remune, comparison of virologic failure and time to virologic failure between Remune and adjuvant placebo arms revealed no differences between the 2 arms of the study. Results of this study suggest that the hypothesis in A5057 (that recipients of Remune would have only 50 percent of the number of virologic relapses as occur in the control arm) is no longer plausible in its current design. This protocol is being redesigned.] A substudy adds the HIV canarypox vaccine (vCP1452) in patients in the parent study and evaluates whether canarypox vaccine can augment the immune responses of Remune.

Patients will add either Remune (Arm A), or the placebo Incomplete Freund's Adjuvant (Arm B), to their antiretroviral therapy. They will be stratified to 1 of the following 4 groups:

  1. Patients suppressed with 3 or more antiretroviral drugs for 15 months or longer, with an HIV-1 RNA below 50 copies/ml, and who may have substituted 1 antiretroviral medication during that time.
  2. Patients suppressed with 3 or more antiretroviral drugs, who have not taken antiretroviral medications for 15 months or longer, with an HIV-1 RNA below 50 copies/ml, and who may have substituted 1 antiretroviral medication during that time. [AS PER AMENDMENT 7/20/00: This stratum includes patients who have taken their current antiretroviral therapy for less than 15 months prior to screening viral load measurement. If these patients changed from prior antiretroviral regimen(s) during the 15 months prior to screening, they must have changed at least 2 antiretroviral drugs during this time.]
  3. Patients suppressed with 3 or more antiretroviral drugs and whose HIV-1 RNA is 50 copies/ml or higher.
  4. Patients suppressed with 2 antiretroviral drugs. Injections of either Remune or IFA are given at Day 1 and once every 12 weeks for 96 weeks. Patients remain at the clinic for observation for 30 minutes following the first and second injections. If a patient's HIV viral level rises above a certain level, the patient and his/her health care provider may decide to change antiretroviral drugs to try and lower it. Injections will be suspended until the lower level is achieved, then resumed on the regular 12-week schedule. If the decision is not to change therapy, or the viral load does not decrease to under 500 copies/ml within 3 to 4 months, injections may still be received as long as the HIV RNA level is below 5,000 copies/ml. Blood samples are collected prior to every injection to determine CD4/CD8 counts and viral load, to assay for viral presence in peripheral blood mononuclear cells, and to store for future studies. Pregnancy tests for women of reproductive potential, physical exams, and medical histories are done prior to every immunization.

An immunological substudy will randomize 80 of the eligible volunteers from the study cohort to additionally receive ALVAC vCP1452 or placebo (ALVAC) with equal probability. Arm A will receive ALVAC vCP1452; Arm B will be administered placebo.

[AS PER AMENDMENT 7/20/00: The study is closed to accrual except for patients who enroll into A5058s until the protocol can be redesigned. Patients enrolled under Version 1.0 continue to be followed every 12 weeks (plus or minus 14 days) until the end of the study. Patients should continue taking the same potent antiretroviral treatment that they were taking at study entry until reaching the primary endpoint of first virologic relapse.]

Studietype

Ingrijpend

Inschrijving

472

Fase

  • Fase 3

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

  • Verenigde Staten
    • California
      • Los Angeles, California, Verenigde Staten, 900331079
        • USC CRS
      • Palo Alto, California, Verenigde Staten, 943055107
        • Stanford CRS
      • San Francisco, California, Verenigde Staten, 941102859
        • Ucsf Aids Crs
    • Florida
      • Miami, Florida, Verenigde Staten, 331361013
        • Univ. of Miami AIDS CRS
    • Hawaii
      • Honolulu, Hawaii, Verenigde Staten, 96816
        • Univ. of Hawaii at Manoa, Leahi Hosp.
    • Maryland
      • Baltimore, Maryland, Verenigde Staten, 21287
        • Johns Hopkins Adult AIDS CRS
    • Massachusetts
      • Boston, Massachusetts, Verenigde Staten, 02114
        • Massachusetts General Hospital ACTG CRS
      • Boston, Massachusetts, Verenigde Staten, 02215
        • Beth Israel Deaconess Med. Ctr., ACTG CRS
      • Boston, Massachusetts, Verenigde Staten, 02215
        • Brigham and Women's Hosp. ACTG CRS
      • Boston, Massachusetts, Verenigde Staten
        • Bmc Actg Crs
    • New York
      • New York, New York, Verenigde Staten, 10003
        • Beth Israel Med. Ctr., ACTU
      • New York, New York, Verenigde Staten, 10016
        • NY Univ. HIV/AIDS CRS
      • Rochester, New York, Verenigde Staten, 14642
        • Univ. of Rochester ACTG CRS
    • North Carolina
      • Chapel Hill, North Carolina, Verenigde Staten, 275997215
        • Unc Aids Crs
    • Ohio
      • Cleveland, Ohio, Verenigde Staten, 44106
        • Case CRS
    • Pennsylvania
      • Philadelphia, Pennsylvania, Verenigde Staten, 19104
        • Hosp. of the Univ. of Pennsylvania CRS
    • Tennessee
      • Nashville, Tennessee, Verenigde Staten, 37203
        • Vanderbilt Therapeutics CRS

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

14 jaar en ouder (Kind, Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria

Patients may be eligible for this study if they:

  • Are HIV-positive.
  • Have been on certain anti-HIV drugs for at least 3 months and intend to continue the same anti-HIV drugs unless they develop side effects to the drugs or their viral load rises above a certain level.
  • Have a viral load of less than 500 copies/ml for at least 3 months before entering the study.
  • Have a CD4 count of at least 300 cells/mm3.
  • Are at least 14 years old (consent of parent or guardian required if under 18).
  • Agree to practice barrier methods of birth control (such as condoms) while on the study and for 3 months after the study ends.
  • Patients may be eligible for the substudy if they:
  • Are at least 18 years old.
  • Have a plasma HIV viral load below 50 copies/ml.

Exclusion Criteria

Patients will not be eligible for this study if they:

  • Are pregnant or breast-feeding.
  • Have had an infection requiring antibiotics, an outbreak of herpes simplex virus (HSV) or herpes zoster, or other illness or surgery within 30 days of study entry. (This study has been changed to exclude patients who have had an outbreak of HSV or herpes zoster or have had surgery within 30 days of study entry.)
  • Currently have any long-term infection other than HIV.
  • Have cancer that requires chemotherapy.
  • Have had lymph node irradiation.
  • Have ever received an HIV vaccine.
  • Have taken certain drugs affecting the immune system within 30 days of study entry.
  • Have taken hydroxyurea within 30 days of study entry.
  • Have received any vaccine within 30 days of study entry.
  • Patients will not be eligible for the substudy if they:
  • Have a history of allergies to egg proteins or neomycin, or a history of other serious allergic reactions.
  • Ever worked closely with canaries in a bird shop or breeding farm.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Masker: Dubbele

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

Onderzoekers

  • Studie stoel: Fred Valentine
  • Studie stoel: Laurence Peiperl

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie voltooiing (Werkelijk)

1 september 2005

Studieregistratiedata

Eerst ingediend

23 mei 2000

Eerst ingediend dat voldeed aan de QC-criteria

30 augustus 2001

Eerst geplaatst (Schatting)

31 augustus 2001

Updates van studierecords

Laatste update geplaatst (Werkelijk)

1 november 2021

Laatste update ingediend die voldeed aan QC-criteria

28 oktober 2021

Laatst geverifieerd

1 oktober 2021

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • A5057
  • A5058s
  • 10673 (Register-ID: DAIDS ES Registry Number)
  • ACTG A5057
  • AACTG A5057

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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