Study 105 Atazanavir + [Cobicistat or Ritonavir] + TDF-FTC (Phase 2) - - PowerPoint PPT Presentation

Atazanavir + [Cobicistat or Ritonavir] + TDF-FTC (Phase 2)

Study 105

Atazanavir + [Cobicistat or Ritonavir] + TDF-FTC (Phase 2)

Study 105: Study Design

Source: Elion R, et al. AIDS. 2011;25:1881-6.

Atazanavir-cobicistat + Tenofovir DF-Emtricitabine

(n = 50)

Atazanavir + Ritonavir + Tenofovir DF-Emtricitabine

(n = 29)

Study Design: 105

• Background: Randomized, partially placebo-

controlled, double-blind phase 2 trial to compare the safety and efficacy of cobicistat and ritonavir as pharmacokinetic enhancers administered with atazanavir and fixed-dose tenofovir DF- emtricitabine in treatment-naïve adults with HIV infection

• Inclusion Criteria (n = 85)
• Age ≥18
• Antiretroviral treatment-naïve
• HIV RNA ≥5000 copies/ml
• CD4 count >50 cells/mm3
• Treatment Arms (all once daily)
• Atazanavir-cobicistat (300/150 mg) + TDF-FTC
• Atazanavir 300 mg + Ritonavir 100 mg + TDF-FTC

2x 1x

Atazanavir + [Cobicistat or Ritonavir] + TDF-FTC (Phase 2)

Study 105: Results

Week 24 and 48: Virologic Response (ITT, Missing=Failure)

Source: Elion R, et al. AIDS. 2011;25:1881-6.

84 82 86 86 20 40 60 80 100 24 Weeks 48 Weeks HIV RNA <50 copies/mL (%)

Study Week

Atazanavir-cobicistat + TDF-FTC Atazanavir + Ritonavir + TDF-FTC

Atazanavir + [Cobicistat or Ritonavir] + TDF-FTC (Phase 2)

Study 105: Results

Adverse Events and Treatment Discontinuations

Source: Elion R, et al. AIDS. 2011;25:1881-6.

36 4 14 96 48 3 17 100

20 40 60 80 100 Treatment-related AEs Treatment discontinuation due to AEs Ocular icterus/jaundice Hyperbilirubinemia Patients (%) Atazanavir/cobicistat + FTC-TDF Atazanavir/ritonavir + FTC-TDF

Atazanavir + [Cobicistat or Ritonavir] + TDF-FTC (Phase 2)

Study 105: Conclusions

Source: Elion R, et al. AIDS. 2011;25:1881-6.

Conclusion: “Using cobicistat and ritonavir as pharmacoenhancers for atazanavir and administered with emtricitabine/tenofovir DF achieved comparable rates of virologic suppression and CD4 cell count increase with satisfactory safety profiles.”

Acknowledgment

The National HIV Curriculum is an AIDS Education and Training Center (AETC) Program resource funded by the United States Health Resources and Services Administration. The project is led by the University of Washington and the AETC National Coordinating Resource Center.

The content in this slide set does not represent the official views of the U.S. Department of Health and Human Services, Health Resources & Services Administration.