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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.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

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].]

Undersøgelsestype

Interventionel

Tilmelding

80

Fase

  • Fase 2

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

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

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

13 år og ældre (Barn, Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

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.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Maskning: Dobbelt

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Studiestol: Pablo Tebas
  • Studiestol: John Bartlett

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. november 1999

Studieafslutning

1. april 2001

Datoer for studieregistrering

Først indsendt

17. januar 2000

Først indsendt, der opfyldte QC-kriterier

30. august 2001

Først opslået (Skøn)

31. august 2001

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

9. september 2008

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

8. september 2008

Sidst verificeret

1. juni 2003

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • ACTG A5064
  • AACTG A5064

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .