Effect Of A CCR5 Coreceptor Antagonist On The Latency And Reservoir Of HIV-1

HIV-1 Clinical Trial

Official title:

Pilot Study Of The Effect Of A CCR5 Coreceptor Antagonist On The Latency And Reservoir Of HIV-1 In Patients Taking Highly Active Antiretroviral Therapy

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00795444
• Other study ID #: ERRADVIH-01
• Secondary ID: Eudra CT 2007-00
• Status: Completed
• Phase: Phase 2
• First received: November 10, 2008
• Last updated: January 23, 2015
• Start date: March 2008
• Est. completion date: January 2015

Study information

• Verified date: January 2015
• Source: Fundacion para la Investigacion Biomedica del Hospital Universitario Ramon y Cajal
• Contact: n/a
• Is FDA regulated: No
• Health authority: Spain: Spanish Agency of Medicines
• Study type: Interventional

Clinical Trial Summary

The presence of a pool of cells latently infected by HIV-1 in patients taking HAART and with a viral load below 50 copies/mL is the main limitation to eradication of the virus from the body. This viral reservoir prevents antiretroviral therapy from being interrupted; therefore, patients are obliged to continue with treatment for a period calculated to be greater than 60 years.

Despite the important advances in knowledge of the biology of this reservoir, we still have no real knowledge about its dynamics. The opportunity to carry out a clinical trial for the first time with CCR5 coreceptor antagonists is exceptional, since the results could provide important information on the nature of this reservoir.

If maintenance of the reservoir is a dynamic process, inclusion of CCR5 inhibitors is expected to lead to a reduction in the size of this reservoir. This effect could be critical when including IAT (viral reactivation), since, in theory, it would be necessary to act on a smaller reservoir. Current consensus is that it would be necessary to act on almost 100% of the viral reservoir (approximately 1,000,000 cells).

The study has also been designed to enable us to understand the biochemical and molecular mechanisms by which certain drugs can induce viral reactivation in vitro as a previous step to a clinical trial aimed at reactivating viral latency and eradicating HIV-1 from the body.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 10
• Est. completion date: January 2015
• Est. primary completion date: January 2015
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• After receiving information on the design and objectives of the study, the possible risks involved, and the fact that they can refuse to collaborate at any time, patients will give their informed consent to participate in the study and agree to provide material for the cellular and molecular studies.

• Aged over 18 years.

• Chronic HIV infection

• Antiretroviral therapy with at least 3 drugs for at least 2 years and with no modifications expected during the study. Antiretroviral drugs can be switched due to intolerance as long as plasma viremia remains controlled.

• Undetectable viral load determined by ultrasensitive techniques (<50 copies HIV RNA/mL) for at least 2 years.

• CD4+ T lymphocyte count above 350 cells/mm3.

• Demonstration of R5 viral tropism (use of CCR5 coreceptors) by phenotyping in plasma samples stored before antiretroviral therapy is started.

• Understand the objective of the study and be available to make frequent visits to the hospital.

Exclusion Criteria:

• Previous failure of antiretroviral therapy, understood as a rebound in viral load that can be detected after having reached undetectable levels. Low-grade increases (<200 copies of HIV RNA/mL) and transitory increases (blips) resolved without modifying antiretroviral therapy are excluded.

• Proven resistance against the antiretroviral drugs under study.

• Planned interruption of antiretroviral therapy.

• Taking immunosuppressive or immunostimulating medication of any type, including valproic acid.

• Taking a fusion inhibitor (enfuvirtide).

• Pregnancy or intention to become pregnant during the study.

Study Design

Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science

Related Conditions & MeSH terms

• HIV-1

Intervention

Drug:
• maraviroc
Maraviroc (INN), 300 mg tablets. A dose of 300 mg will be administered every 12 hours.

Locations

Country	Name	City	State
Spain	Hospital Universitario Ramon Y Cajal	Madrid

Sponsors (2)

Lead Sponsor	Collaborator
Fundacion para la Investigacion Biomedica del Hospital Universitario Ramon y Cajal	Pfizer

Country where clinical trial is conducted

Spain, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Frequency of resting CD4+ T cells infected by a replicative virus		18 months	No