Phase 3b Open Label Study to Evaluate Switching From Regimens Consisting of a Ritonavir-boosted Protease Inhibitor Plus Emtricitabine/Tenofovir Fixed-Dose Combination to the Elvitegravir/Cobicistat/Emtricitabine/Tenofovir DF Single-Tablet Regimen in Virologically Suppressed, HIV 1 Infected Patients

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Gilead Sciences
ClinicalTrials.gov Identifier:
NCT01475838
First received: November 17, 2011
Last updated: January 22, 2015
Last verified: January 2015
  Purpose

This study will evaluate the non-inferiority of Stribild (elvitegravir/cobicistat/ emtricitabine/tenofovir disoproxil fumarate [EVG/COBI/FTC/TDF]) single-tablet regimen relative to regimens consisting of a ritonavir-boosted protease inhibitor (PI+RTV) plus truvada (FTC/TDF) fixed-dose combination in maintaining HIV-1 RNA < 50 copies/mL at Week 48 in virologically suppressed, HIV-1 infected adults. This study will also evaluate the safety, tolerability, and efficacy of the two regimens through 96 weeks of treatment.


Condition Intervention Phase
Acquired Immunodeficiency Syndrome
HIV Infections
Drug: Stribild
Drug: RTV
Drug: FTC/TDF
Drug: PI
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Safety/Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Phase 3b Randomized, Open-Label Study to Evaluate Switching From Regimens Consisting of a Ritonavir-boosted Protease Inhibitor (PI + RTV) Plus Emtricitabine/Tenofovir Disoproxil Fumarate (FTC/TDF) to the Elvitegravir/Cobicistat/Emtricitabine/Tenofovir Disoproxil Fumarate Single-Tablet Regimen (EVG/COBI/FTC/TDF) in Virologically-Suppressed, HIV-1 Infected Patients

Resource links provided by NLM:


Further study details as provided by Gilead Sciences:

Primary Outcome Measures:
  • Percentage of Participants With HIV-1 RNA < 50 Copies/mL at Week 48 [ Time Frame: Week 48 ] [ Designated as safety issue: No ]
    The FDA-defined Snapshot algorithm was used, which defines a patient's virologic response status using only the viral load at the predefined time point within an allowed window of time.


Secondary Outcome Measures:
  • Change From Baseline in CD4+ Cell Count at Week 48 [ Time Frame: Baseline; Week 48 ] [ Designated as safety issue: No ]

Enrollment: 438
Study Start Date: November 2011
Study Completion Date: December 2014
Primary Completion Date: November 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Stribild
Participants will be randomized to switch to Stribild for 96 weeks.
Drug: Stribild
Elvitegravir (EVG) 150 mg/cobicistat (COBI) 150 mg/emtricitabine (FTC) 200 mg/tenofovir disoproxil fumarate (TDF) 300 mg single-tablet regimen (STR) administered orally once daily with food
Active Comparator: PI+RTV+FTC/TDF
Participants will be randomized to remain on their current antiretroviral regimen consisting of an RTV-boosted PI plus FTC/TDF for 96 weeks.
Drug: RTV
Ritonavir (RTV) administered according to prescribing information
Drug: FTC/TDF
FTC/TDF administered according to prescribing information
Other Name: Truvada®
Drug: PI
Protease inhibitor (PI) administered according to prescribing information, which may include atazanavir (ATV), darunavir (DRV), fosamprenavir (FPV), lopinavir (LPV), or saquinavir (SQV)

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Ability to understand and sign a written informed consent form
  • Be on a stable antiretroviral regimen consisting of a ritonavir boosted PI plus FTC/TDF continuously for ≥ 6 consecutive months preceding the screening visit
  • Be on the first or second antiretroviral drug regimen documented undetectable plasma HIV 1 RNA levels for ≥ 6 months preceding the screening visit
  • No previous use of any approved or experimental integrase strand transfer inhibitor (INSTI) for any length of time
  • Documented historical genotype prior to starting initial antiretroviral therapy showing no known resistance to TDF or FTC
  • HIV RNA < 50 copies/mL
  • Normal ECG
  • Hepatic transaminases ≤ 5 × the upper limit of the normal range (ULN)
  • Total bilirubin ≤ 1.5 mg/dL, or normal direct bilirubin
  • Adequate hematologic function
  • Serum amylase ≤ 5 × ULN
  • Estimated glomerular filtration rate ≥ 70 mL/min according to the Cockcroft-Gault formula
  • Females of childbearing potential must agree to utilize highly effective contraception methods, or be nonheterosexually active, practice sexual abstinence from screening throughout the duration of the study period and for 30 days following the last dose of study drug
  • Female subjects who utilize hormonal contraceptive as one of their birth control methods must have used the same method for at least three months prior to study dosing
  • Male subjects must agree to utilize a highly effective method of contraception during heterosexual intercourse from the screening visit, throughout the duration of the study and for 30 days following discontinuation of investigational medicinal product, or must be non-heterosexually active, or practice sexual abstinence

Exclusion Criteria:

  • A new AIDS-defining condition diagnosed within the 30 days prior to screening
  • Females who are breastfeeding
  • Positive serum pregnancy test (female of childbearing potential)
  • Receiving drug treatment for hepatitis C, or subjects who are anticipated to receive treatment for hepatitis C during the course of the study
  • Experiencing decompensated cirrhosis
  • Have an implanted defibrillator or pacemaker
  • Current alcohol or substance abuse that would interfere with compliance
  • A history of malignancy within the past 5 years or ongoing malignancy other than cutaneous Kaposi's sarcoma, basal cell carcinoma, or resected, noninvasive cutaneous squamous carcinoma
  • Active, serious infections requiring parenteral antibiotic or antifungal therapy within 30 days prior to Baseline, except for intramuscular penicillin for the treatment of syphilis
  • Have been treated with immunosuppressant therapies or chemotherapeutic agents within 3 months of study screening, or expected to receive these agents or systemic steroids during the study
  • Subjects receiving ongoing therapy with any of the medications, including drugs not to be used with EVG, COBI, FTC, TDF or subjects with any known allergies to the excipients of EVG/COBI/FTC/TDF tablets, or Truvada® tablets.
  • No anticipated need to initiate drugs during the study that are contraindicated
  • Receiving other investigational drugs
  • Participation in any other clinical trial
  • Any other clinical condition or prior therapy that would make the subject unsuitable for the study or unable to comply with the dosing requirements
  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: NCT01475838

  Show 99 Study Locations
Sponsors and Collaborators
Gilead Sciences
Investigators
Study Director: Thai Nguyen, MD Gilead Sciences
  More Information

Publications:
Responsible Party: Gilead Sciences
ClinicalTrials.gov Identifier: NCT01475838     History of Changes
Other Study ID Numbers: GS-US-236-0115, 2011-004483-30
Study First Received: November 17, 2011
Results First Received: January 8, 2015
Last Updated: January 22, 2015
Health Authority: United States: Food and Drug Administration

Keywords provided by Gilead Sciences:
HIV-1
HIV
Treatment Experienced

Additional relevant MeSH terms:
Acquired Immunodeficiency Syndrome
HIV Infections
Immunologic Deficiency Syndromes
Immune System Diseases
Lentivirus Infections
RNA Virus Infections
Retroviridae Infections
Sexually Transmitted Diseases
Sexually Transmitted Diseases, Viral
Slow Virus Diseases
Virus Diseases
Emtricitabine
HIV Protease Inhibitors
Protease Inhibitors
Ritonavir
Tenofovir
Tenofovir disoproxil
Anti-HIV Agents
Anti-Infective Agents
Anti-Retroviral Agents
Antiviral Agents
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Nucleic Acid Synthesis Inhibitors
Pharmacologic Actions
Reverse Transcriptase Inhibitors
Therapeutic Uses

ClinicalTrials.gov processed this record on September 01, 2015