Effect of Vicriviroc on HIV Ribonucleic Acid (RNA) Levels in Cerebrospinal Fluid (Study P05241)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00632073
Recruitment Status : Completed
First Posted : March 10, 2008
Last Update Posted : February 23, 2015
Information provided by (Responsible Party):
Merck Sharp & Dohme Corp.

January 24, 2008
March 10, 2008
February 23, 2015
March 2008
July 2009   (Final data collection date for primary outcome measure)
Change in HIV RNA levels in CSF [ Time Frame: Pretreatment and Week 2 visits ]
Same as current
Complete list of historical versions of study NCT00632073 on Archive Site
Proportion of subjects achieving CSF HIV RNA <50 copies/mL [ Time Frame: Week 2 ]
Same as current
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Effect of Vicriviroc on HIV Ribonucleic Acid (RNA) Levels in Cerebrospinal Fluid (Study P05241)
Effect of Vicriviroc on HIV RNA Levels in Cerebrospinal Fluid
Vicriviroc (vye-kri-VYE-rock) is an investigational drug (not yet approved by Government Regulatory Authorities for commercial use) that belongs to a new class of drugs, called CCR5 receptor blockers. This group of drugs blocks one of the ways HIV enters T-cells (the cells that fight infection). Previous studies in HIV treatment-experienced patients have shown that vicriviroc is safe and effective. The purpose of this study is to determine the effect of vicriviroc on HIV RNA levels in cerebrospinal fluid (CSF).
This is a nonrandomized, open-label, multicenter study to investigate the HIV antiviral response in CSF when vicriviroc is added for 2 weeks to the subject's failing antiretroviral background regimen. The primary efficacy endpoint of this study is the mean change in log10 CSF HIV RNA from baseline at Week 2. The secondary efficacy endpoint is the proportion of subjects achieving CSF HIV RNA <50 copies/mL at Week 2. At Week 2, the subject's background regimen will be optimized and vicriviroc continued up to Week 24. After completing Week 24 of the study, subjects will be offered the option to continue on open-label VCV 30 mg once daily, if appropriate, until commercially available or until the sponsor terminates the clinical development of VCV. Subjects who discontinue vicriviroc for any reason will be requested to participate in long-term follow up.
Phase 1
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
HIV Infections
Drug: Vicriviroc
One tablet of vicriviroc maleate 30 mg once daily for 24 weeks (added to the subject's failing antiretroviral background regimen for 2 weeks, and then administered with optimized background therapy).
Other Name: Vicriviroc maleate, SCH-D, SCH 417690, VCV
Experimental: VCV + Failing HAART
Vicriviroc plus failing highly-active antiretroviral therapy
Intervention: Drug: Vicriviroc
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
March 2010
July 2009   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • A subject must be at least 18 years of age at the time of study entry, of either sex, and of any race.
  • A subject must be infected with HIV-1 virus, as documented by a positive assay for HIV-1 RNA in plasma, prior to Screening.
  • A subject's HIV isolate must be solely CCR5-tropic at Screening (ie, a subject must not have detectable CXCR4-tropic or dual/mixed CCR5/CXCR4-tropic HIV isolates).
  • Subjects must be failing their current antiretroviral regimen with plasma HIV RNA >=1000 copies/mL at the time of screening. (Note: The failing background regimen must contain a ritonavir-boosted PI, and may not include an NNRTI.)
  • A subject must be willing to undergo study procedures including lumbar punctures, and to adhere to the chosen antiretroviral regimen.
  • A subject must have a pretreatment CSF HIV RNA of >=200 copies/mL.

Exclusion Criteria:

  • A subject must not be taking medication for seizure control or have any condition that, in the judgment of the investigator, is likely to increase the risk of seizures.
  • A subject must not have a prior history of malignancy (with the exception of surgically resected basal cell carcinoma with clear margins or Kaposi's sarcoma without visceral or mucosal involvement that resolved without systemic anticancer treatment).
  • A subject must not have a contraindication to lumbar puncture (eg, bleeding diathesis or use of anticoagulants).
Sexes Eligible for Study: All
18 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
Not Provided
Chile,   Puerto Rico,   United States
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Merck Sharp & Dohme Corp.
Merck Sharp & Dohme Corp.
Not Provided
Not Provided
Merck Sharp & Dohme Corp.
February 2015

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP