A Prospective, Randomised Study to Assess Safety, Changes in Platelet Reactivity, Plasma Cardiac Biomarkers, Immunological and Metabolic Parameters in HIV-1 Infected Subjects Undergoing a Switch in Antiretroviral Therapy
试验速览
- 阶段
- 4 期
- 状态
- 终止
- 入组人数
- 18
- 试验地点
- 3
- 主要终点
- Mean change from baseline in platelet reactivity between treatment arms at week 12
研究概览
简要总结
The aim of the study is to determine whether switching from an antiretroviral regimen containing abacavir and/or didanosine to one containing maraviroc will lead to a reduction in platelet reactivity and inflammatory markers at weeks 12 and 24 thereby conferring a reduction in cardiac risk.
In addition the study will assess the efficacy of a maraviroc containing regimen in combination with a boosted protease inhibitor in terms of tolerability and achieving long term viral suppression as assessed at week 48.
The investigators hypothesize that there will be a rapid reduction in platelet reactivity on switching to maraviroc and that a boosted protease inhibitor in combination with maraviroc will provide a safe and efficacious antiretroviral regimen enabling a reduction in cardiac risk whilst maintaining virological suppression.
详细描述
To assess the safety, changes in platelet reactivity, plasma cardiac biomarkers and metabolic parameters in HIV 1 infected subjects undergoing a switch in ART from a nucleoside containing regimen which includes abacavir and / or didanosine to a maraviroc containing regimen.
40 HIV-1 infected subjects currently receiving stable antiretroviral therapy consisting of a boosted protease inhibitor and two NRTIs including abacavir and / or didanosine will be recruited. Subjects will be randomized on a 1:1 basis to one of two arms:
Arm 1 (immediate switch in antiretroviral therapy)
- Continue current boosted protease inhibitor
- Switch NRTI backbone to maraviroc 150 mg bid
Arm 2 (continue current antiretroviral therapy)
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •HIV-1 infected males or females
- •Between 18 and 65 years of age
- •Signed informed consent
- •Currently receiving a stable antiretroviral regimen comprising of:
- •two licensed NRTIs including abacavir and/or didanosine
- •any licensed boosted protease inhibitor at any dose (excluding tipranavir*)
- •Undetectable plasma HIV RNA to less than 50 copies/mL for at least 24 weeks prior to screening
- •Availability of stored plasma with which to perform a tropism assay
- •CCR5 tropic HIV virus based on a tropism assay from a stored plasma sample
- •Willing to continue unchanged, or to modify antiretroviral therapy, in accordance with the randomisation assignment
- •No documented viral resistance to currently licensed HIV-1 protease inhibitors based either on previous HIV-1 genotypic resistance testing or in the judgement of the study investigators
- •No previous exposure to maraviroc or CCR5 receptor antagonists
- •Subjects in good health upon medical history, physical exam, and laboratory testing in the opinion of the investigator
- •Female subjects who are heterosexually active and of childbearing potential (i.e., not surgically sterile or at least two years post menopausal) must avoid becoming pregnancy as follows from screening through completion of the study using one or both of the following methods:
- •barrier contraceptives (condom, diaphragm with spermicide)
- •IUD PLUS a barrier contraceptive
- •Female subjects of childbearing potential must have a negative pregnancy test
排除标准
- •failure of current antiretroviral regimen due to virological failure
- •active opportunistic infection, malignancy or significant co-morbidities in the opinion of the investigator
- •pregnancy
- •current prohibited concomitant medication (as listed in section 4.1.4)
- •no available stored plasma sample predating their current antiretroviral regimen upon which a tropism assay can be performed
- •active HBV infection as evidenced by positive hepatitis B surface antigen
- •active hepatitis C virus infection as evidenced by positive HCV PCR or HCV antibody.
研究组 & 干预措施
Immediate switch
- Continue current boosted protease inhibitor
- Switch NRTI backbone to maraviroc 150 mg bid
干预措施: Maraviroc (Drug)
Continue current antiretroviral therapy
- Continue current antiretroviral regimen until week 12 then switch therapy as per arm 1.
干预措施: Maraviroc (Drug)
结局指标
主要结局
Mean change from baseline in platelet reactivity between treatment arms at week 12
时间窗: 48 weeks
次要结局
- To assess for the following: Mean change over 24 weeks and mean difference at week 12 between study groups in plasma inflammatory and cardiac biomarkers and markers of immune activation(48 weeks)