- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT00238459
Controlling Acute or Early HIV Infection With Antiretroviral Drugs, Without a Candidate Vaccine.As Reported Previously, the Candidate Vaccie Was Not Provided by the Maufacturer as Promised
Immunopathogenesis of Acute and Early HIV Infection and the Role of HIV-Specific CD4 T Cell Responses and the Effect of Their Enhancement by Potent Antiretroviral Drugs and an HIV Vaccine Adequate Vaccine Was Not Provided.
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
- Arzneimittel: multiple licensed drugs not randomized
- Arzneimittel: Patients elected to take licensed drugs. The vaccine was not provided for evaluation
- Arzneimittel: multiple licensed antiretroviral drugs; not randomized
- Sonstiges: Intended vaccine not provided, Licensed drugs provided, but were not investigated
Detaillierte Beschreibung
In some HIV patients with acute or early infection, effective long-term immunological control of HIV occurs, indicating that before HIV caused irreparable damage, their immune systems were able to mount an effective immune response to HIV. However, it is unknown how the immune systems of such patients with acute or early infection are able to develop and maintain effective memory CD4 immune responses. In other HIV patients, it is the destruction of CD4 cells and an ever-weakening immune system that leads to the progression of HIV disease. HIV-1 immunogen is a whole killed gp120-depleted HIV vaccine composed of an HIV-1 isolate (HZ321) from serum collected from a patient in Zaire in 1976. The vaccine contains proteins from HIV subtypes A and G. By injecting these particles into HIV infected people, the immune system may be stimulated to mount a greater immune response not only to the killed HIV particles of the vaccine but also to real virus particles and HIV infected cells in these people. Also, because HIV-1 immunogen is based on whole inactivated virus, it may stimulate broader immune responses that are capable of suppressing more diverse HIV strains than currently available vaccine preparations that are based on single subunit proteins of HIV. This study was planned to evaluate the safety and efficacy of a therapeutic HIV vaccine, HIV-1 immunogen, in conjunction with STIs, in controlling HIV infection during acute or early infection. Participants will be antiretroviral therapy (ART)-naive and will choose to either start or not start ART in this study.
Participants will elect to start or not start ART at the start of this study. Those participants who choose not to begin ART will not receive any intervention during this study but will be followed for the entire length of the study. Those participants that choose to begin ART will start taking study-approved ART in Step 1 of the study. Only patients who have a viral load of less than 50 copies/ml by Week 24 will proceed to Step 2; all other patients who begin ART will continue on study-approved ART but will not receive any vaccinations over the course of the study. Step 2 is the STI part of the study. In Step 2, patients will stop ART and will be randomly assigned to receive therapeutic vaccine or placebo injections at three timepoints: at the start of Step 2 and 12 and 24 weeks after starting Step 2. Injections will be given only to patients who have been on ART for at least 48 weeks; patients will receive their assigned injections 36 weeks after their first viral load reading of less than 50 copies/ml. A patient will enter Step 3 after having restarted ART for a minimum of 8 weeks after Step 2 ends, when the patient's viral load is less than 400 copies/ml and CD4 count is greater than 250 cells/ml. Entry into Step 4, which will include additional retreatment and revaccination, may be necessary for some participants, depending on individual immune response to the study-given ART and the injections.
The ART participants in this study will receive either study-provided ART or another approved ART; however, only study-provided ART will be provided by the study. Viral load and CD4 count will be closely monitored and will guide retreatment and revaccination as necessary. Blood collection will occur at all visits. A physical exam will occur at most visits. Urine collection and quality of life and adherence questionnaires will occur at selected visits.
NOTE: In August 2007 we were notified by the manufacturer of the candidate vaccine that they were no longer making the vaccine, and that the vaccine would no longer be available. Unfortunately too few participants have received either the vaccine or placebo to conclude anything about efficacy. No safety problems occurred.
Studientyp
Einschreibung (Tatsächlich)
Kontakte und Standorte
Studienorte
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Quebec
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Montreal, Quebec, Kanada
- McGill University and University of Montreal
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New York
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New York, New York, Vereinigte Staaten, 10016
- New York University School of Medicine
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Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
- Acute or early HIV infection
- ART naive
- Willing to use acceptable forms of contraception
Exclusion Criteria:
- Allergy/sensitivity to any components of the vaccine
- Currently involuntarily incarcerated
- Pregnant or breastfeeding
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
Kohorten und Interventionen
Gruppe / Kohorte |
Intervention / Behandlung |
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Recently infected patients
Cohort 1)Patients elcted to be immediately treated with licensed drugs:21 patients Cohort 2) Or to delay treatment until clinically indicated:16 patieints
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A vaccine,HIV-1 immunogen was not provided for evaluation
In the intial design, acandiate HIV vaccine was to be evaluated, but in August 2007 the manufacturer refused to provide vaccine to allow this study to evaluate the effect of a vaccine on control of HIV.
Therefore the study became an observational study of the effects of early versus delayed initiation of antiretrovral therapy on the preservation of anti-HIV immune responses and the ability of patients to control virus after a closely monitored discontinuation of therapy.
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Note:In August 2007 we were notified by the manufacturer that the experimental vaccine was no longer being made and would no longer be available for this study.
Too few participants have received the vaccine or placebo to conclude anything about potential efficacy
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Zeitfenster |
---|---|
Effects of treatment on HIV-specific immune responses.
Zeitfenster: Weekly and then monthly after stopping antiretroviral drugs
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Weekly and then monthly after stopping antiretroviral drugs
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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Zeitfenster |
---|---|
Immune control of HIV after stopping antiretroviral drugs.
Zeitfenster: Weekly and then monthly after stopping antirretroviral drugs
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Weekly and then monthly after stopping antirretroviral drugs
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Mitarbeiter und Ermittler
Ermittler
- Hauptermittler: Fred Valentine, MD, NYU Langone Health
Publikationen und hilfreiche Links
Allgemeine Veröffentlichungen
- Peters BS. The basis for HIV immunotherapeutic vaccines. Vaccine. 2001 Dec 12;20(5-6):688-705. doi: 10.1016/s0264-410x(01)00394-2.
- Stekler J, Collier AC. Primary HIV Infection. Curr HIV/AIDS Rep. 2004 Jun;1(2):68-73. doi: 10.1007/s11904-004-0010-2.
- Wahren B, Liu M. Therapeutic vaccination against HIV. Expert Rev Vaccines. 2004 Aug;3(4 Suppl):S179-88. doi: 10.1586/14760584.3.4.s179.
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn
Primärer Abschluss (Tatsächlich)
Studienabschluss (Tatsächlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Schätzen)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Pathologische Prozesse
- RNA-Virusinfektionen
- Viruserkrankungen
- Durch Blut übertragene Infektionen
- Sexuell übertragbare Krankheiten, viral
- Sexuell übertragbare Krankheiten
- Lentivirus-Infektionen
- Retroviridae-Infektionen
- Immunologische Mangelsyndrome
- Erkrankungen des Immunsystems
- Krankheitsattribute
- Langsame Viruserkrankungen
- HIV-Infektionen
- Infektionen
- Übertragbare Krankheiten
- Erworbenes Immunschwächesyndrom
- Physiologische Wirkungen von Arzneimitteln
- Antiinfektiva
- Antivirale Mittel
- Immunologische Faktoren
- Impfungen
- Antiretrovirale Mittel
Andere Studien-ID-Nummern
- 5P01AI57127-2
- 5P01AI057127 (US NIH Stipendium/Vertrag)
Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .
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