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Effectiveness of the Early Addition of Abacavir to an Anti-HIV Drug Combination

A Pilot Study of Early Treatment Intensification of Antiretroviral Therapy

The purpose of this study is to see if adding 1 drug to an anti-HIV drug combination early in treatment against HIV can lower the viral load (amount of HIV in the blood) to a level so low that it cannot be measured (undetectable). The drug that will be added to a treatment is abacavir (ABC).

Many patients who take 3 anti-HIV drugs together are able to achieve very low viral loads, for example, viral loads below 50 copies/ml. However, some patients taking only 3 drugs are not able to achieve a viral load this low. Doctors hope that, by adding the drug ABC to a current treatment, a viral load below 50 copies/ml can be achieved. Doctors would like to find out if it is effective to start patients on 3 drugs and then add another drug (treatment intensification) if the treatment is not working as well as hoped.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

Combination antiretroviral therapy can offer patients potent suppression of HIV replication and improved immunologic functioning. However, despite aggressive antiretroviral regimens currently in use, only about 50 to 60 percent of patients attain plasma viral loads below 50 copies/ml after 24 weeks. Initiating treatment with a 4-drug regimen may increase this percentage, but this may also contribute to patient non-adherence, drug-related toxicities, potential cross-resistance to drugs used in future regimens, and high financial costs. Another strategy is early intensification (adding a single drug to an existing regimen) in patients who are at risk for attaining incomplete viral suppression after 24 weeks of therapy. ABC may produce a significant antiviral effect when used as an intensification agent in patients on a stable antiretroviral regimen. The results of this study will offer insight into the potential benefits of early treatment intensification.

Patients entering this study will have initiated potent antiretroviral therapy. Between 60 and 90 days [AS PER AMENDMENT 1/9/01: 60 and 104 days] after beginning their background regimen, patients are randomized to add either ABC (Arm A) or a matching placebo (Arm B) for 12 weeks. Patients completing 12 weeks of treatment continue on study for an additional 24 weeks to Week 36. Patients discontinue treatment if virologic failure occurs at any time. Patients still return to the clinic for HIV-1 RNA measurements at Weeks 12 and 36, depending on when discontinuation occurred. Patients who discontinue treatment at or after Week 12 due to virologic failure are offered open-label ABC for the remainder of the study (through Week 36). Blood samples are collected at Weeks 4, 8, 12, 20, 28, and 36. Plasma samples for population sequencing of HIV-1 PR and RT genes are collected on all patients at study entry and at the time of virologic failure. Baseline genotype (presence or absence of PR and RT resistance mutations and number of resistance mutations) is correlated to treatment outcome. Samples from the time of failure are analyzed for the accumulation of additional resistance mutations. [AS PER AMENDMENT 5/5/00: Patients and their primary care physicians will be unblinded to the patient's treatment after the study is completed at Week 36 or if virologic failure occurs at or after Week 12 [AS PER AMENDMENT 1/9/01: or if ABC hypersensitivity is suspected].]

Tipo di studio

Interventistico

Iscrizione

80

Fase

  • Fase 2

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

      • San Juan, Porto Rico, 009365067
        • Univ of Puerto Rico
    • California
      • Los Angeles, California, Stati Uniti, 90095
        • UCLA CARE Ctr
      • Menlo Park, California, Stati Uniti, 94025
        • Willow Clinic
      • San Jose, California, Stati Uniti, 951282699
        • Santa Clara Valley Med Ctr / AIDS Community Rsch Consortium
      • Stanford, California, Stati Uniti, 943055107
        • San Mateo AIDS Program / Stanford Univ
      • Stanford, California, Stati Uniti, 943055107
        • Stanford Univ Med Ctr
      • Torrance, California, Stati Uniti, 90502
        • Harbor UCLA Med Ctr
    • Colorado
      • Denver, Colorado, Stati Uniti, 80262
        • Univ of Colorado Health Sciences Ctr
    • Florida
      • Miami, Florida, Stati Uniti, 331361013
        • Univ of Miami School of Medicine
    • Georgia
      • Atlanta, Georgia, Stati Uniti, 30308
        • Emory Univ
    • Illinois
      • Chicago, Illinois, Stati Uniti, 60611
        • Northwestern Univ Med School
      • Chicago, Illinois, Stati Uniti, 60612
        • Cook County Hosp
    • Maryland
      • Baltimore, Maryland, Stati Uniti, 21287
        • Johns Hopkins Hosp
      • Baltimore, Maryland, Stati Uniti, 212052196
        • State of MD Div of Corrections / Johns Hopkins Univ Hosp
    • Missouri
      • St Louis, Missouri, Stati Uniti, 63112
        • St Louis Regional Hosp / St Louis Regional Med Ctr
    • New York
      • Buffalo, New York, Stati Uniti, 14215
        • SUNY / Erie County Med Ctr at Buffalo
      • New York, New York, Stati Uniti, 10003
        • Beth Israel Med Ctr
      • New York, New York, Stati Uniti, 10016
        • Bellevue Hosp / New York Univ Med Ctr
      • New York, New York, Stati Uniti, 10032
        • Columbia Presbyterian Med Ctr
      • New York, New York, Stati Uniti, 10021
        • Aaron Diamond AIDS Rsch Ctr / Rockefeller Univ
      • Rochester, New York, Stati Uniti, 14642
        • Univ of Rochester Medical Center
    • North Carolina
      • Chapel Hill, North Carolina, Stati Uniti, 275997215
        • Univ of North Carolina
      • Durham, North Carolina, Stati Uniti, 27710
        • Duke Univ Med Ctr
    • Ohio
      • Cincinnati, Ohio, Stati Uniti, 452670405
        • Univ of Cincinnati
    • Pennsylvania
      • Philadelphia, Pennsylvania, Stati Uniti, 19104
        • Univ of Pennsylvania at Philadelphia
      • Philadelphia, Pennsylvania, Stati Uniti, 19104
        • Philadelphia Veterans Administration Med Ctr
    • South Carolina
      • West Columbia, South Carolina, Stati Uniti, 29169
        • Julio Arroyo
    • Tennessee
      • Nashville, Tennessee, Stati Uniti, 37203
        • Vanderbilt Univ Med Ctr
    • Texas
      • Dallas, Texas, Stati Uniti, 75390
        • Univ of Texas, Southwestern Med Ctr of Dallas
    • Washington
      • Seattle, Washington, Stati Uniti, 98104
        • Univ of Washington

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

13 anni e precedenti (Bambino, Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria

Patients may be eligible for this study if they:

  • Are HIV-positive.
  • Have been taking anti-HIV therapy that includes at least 3 anti-HIV drugs and is an acceptable anti-HIV drug combination for 60 to 104 days before study treatment. Patients must not have changed any of the drugs in the 28 days before study entry. (This study has been changed by extending the number of days that anti-HIV therapy has been received.)
  • Have a viral load greater than 500 but less than or equal to 10,000 copies/ml and have had a significant decrease in viral load between 49 and 84 days after starting this anti-HIV therapy. (This study has been changed by extending the length of time of viral load decrease.)
  • Are at least 13 years old (consent of parent or guardian required if under 18).
  • Agree to practice abstinence or use barrier method of birth control (such as condoms) during the study and for 3 months after.

Exclusion Criteria

Patients will not be eligible for this study if they:

  • Have ever taken ABC.
  • Have received anti-HIV therapy for more than 104 days in the past. (This study has been changed by extending the number of days that anti-HIV therapy has been received.)
  • Have a fever for 7 days in the 30 days before study entry.
  • Have cancer, including Kaposi's sarcoma, that requires chemotherapy.
  • Have an active infection that requires treatment in the 21 days before study entry.
  • Have any opportunistic (AIDS-related) infection or disease that requires a change in medication in the 14 days before study entry.
  • Have any medical condition or history of an illness that the doctor feels would place them at risk or make them unable to complete the study.
  • Are taking drugs that affect the immune system or any experimental anti-HIV drugs, except for their current drug combination.
  • Are taking St. John's wort. (This study has been changed. Previously, patients taking St. John's wort were eligible.)
  • Have received a vaccine in the 21 days before study entry.
  • Are pregnant or breast-feeding.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Mascheramento: Doppio

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Investigatori

  • Cattedra di studio: Pablo Tebas
  • Cattedra di studio: John Bartlett

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio

1 novembre 1999

Completamento dello studio

1 aprile 2001

Date di iscrizione allo studio

Primo inviato

17 gennaio 2000

Primo inviato che soddisfa i criteri di controllo qualità

30 agosto 2001

Primo Inserito (Stima)

31 agosto 2001

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Stima)

9 settembre 2008

Ultimo aggiornamento inviato che soddisfa i criteri QC

8 settembre 2008

Ultimo verificato

1 giugno 2003

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • ACTG A5064
  • AACTG A5064

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .