Active clinical trials for "HIV Infections"

New treatment options are critical for treatment-experienced HIV infected patients with drug resistance. HIV entry inhibitors have been shown effective in patients with resistance to other anti-HIV drugs. This study will test the safety and anti-HIV activity of eight different doses of the HIV entry inhibitor AMD11070 (also known as AMD070) in HIV infected patients.

This study will examine the long-term effects, particularly on bone metabolism, of the drug tenofovir DF in children with HIV infection. Tenofovir DF is approved for treating HIV-infected adults, but its use in children has not yet been approved. The drug may be helpful for children who have been treated with many other drugs and still have detectable HIV in their blood despite ongoing therapy. In a previous study, many children given tenofovir DF responded well, with increases in T-cell counts and decreases in viral load. However, many children also experienced bone thinning. This study will explore the problem of bone thinning in children taking tenofovir DF in combination with highly active antiretroviral therapy (HAART). HIV-infected patients from 4 to 20 years old who are taking tenofovir DF or for whom tenofovir DF treatment has been recommended may be eligible for this 3-year study. Participants take tenofovir DF every day in addition to their antiretroviral therapy. They have frequent follow-up visits for tests and procedures as follows: Study days 0, 2, and 4: blood tests. Screening and every study visit starting day 6: Physical exam, medical history, blood and urine tests. Baseline and every 48 weeks: Dental and eye examinations, kidney ultrasound, tuberculin skin testing, chest x-ray, electrocardiogram and echocardiogram, computed tomography (CT) scan, neuropsychological testing and neurologic assessment. The bone age hand x-rays are done every 24 weeks, unless the growth plates are fused (i.e. the child has stopped growing) DEXAs are done at 0, 12, 24 weeks and every 24 weeks thereafter. Dual energy x-ray absorptionometry (DEXA) scan is used to assess bone density. The patient lies still on a table while the spine and hip are scanned using a small amount of radiation. Only the spine and hip are scanned in the DEXA scan test. Baseline and week 24: Optional bone biopsy. Some patients are asked to undergo a bone biopsy to better understand the effect of Tenofovir DF on bone. For the procedure, the child is given a sedative. The skin over the hipbone is numbed with a small needle, a small incision is made and a larger needle is inserted into the bone. Some of the bone tissue is withdrawn through the needle and the incision is closed. Possible lumbar puncture (spinal tap): This optional procedure analyzes cerebrospinal fluid (CSF), the fluid that bathes the brain and spinal cord. The patient is given a local anesthetic and a needle is inserted into the space between the bones in the lower back where the CSF circulates below the spinal cord. A small amount of fluid is collected through the needle. There is no specific schedule for this procedure if the patient opts for it. Patients who are benefiting from tenofovir DF therapy but show signs of bone effects are offered treatment with pamidronate (Aredia), a drug used to treat hypercalcemia (too much calcium in the blood). Patients who stop taking tenofovir DF because of bone toxicity continue to be followed on the regular study schedule. Those who stop the drug for toxicity other than bone toxicity or for toxicity not related to tenofovir DF are followed every 4 weeks until their laboratory test results improve.

This study was designed to evaluate if subjects who took 600 mg of abacavir and 300 mg of lamivudine once-daily as a single tablet were just as likely to have adverse events compared to subjects who took 300 mg of abacavir and 150 mg of lamivudine administered as separate tablets twice-daily.

This is a phase 1, randomized, placebo-controlled, dose-escalation study of CCR5mAb004 in HIV-1 seropositive individuals who are not receiving concurrent antiretroviral therapy. Subjects will be randomly assigned to receive a single intravenous (IV) infusion of one of four dose levels of CCR5mAb004 or matching placebo. A minimum of 10 subjects will be randomized to each cohort at a ratio of 4:1 (active:placebo). A minimum of 40 and maximum of 60 subjects will be enrolled. This study will be conducted at up to 10 sites in the United States. Subjects in each cohort will be followed for 56 days after study agent administration. The safety, tolerability, and immunogenicity of CCR5mAb004 will be evaluated based on physical examination, adverse event (AE) reporting, and clinical laboratory tests. Blood will be collected at specified times for the determination of CCR5mAb004 serum concentrations, HIV-1 RNA levels, and CD4+ and CD8+ cell counts. If CD4+ cell counts are less than 200 during the study period, the subject should be offered standard-of-care per HIV treatment guidelines that may include the initiation of appropriate anti-retroviral therapy (AVR). CCR5mAb004 pharmacokinetic (PK) and pharmacodynamics (PD) will be measured over the 56-day study period. Anti-CCR5mAb004 antibody titers will be assessed prior to dosing on Day 0 and on Day 28 and Day 56.

This is a Phase II, open-label, roll-over trial to evaluate the long term safety and tolerability of TMC125, administered as part of an individually optimized antiretroviral therapy, in HIV 1 infected subjects. In addition, the antiviral activity and immunological effect of TMC125 as part of an antiretroviral regimen over time, and the evolution of HIV phenotype and genotype will be evaluated.

The purpose of this study is to determine which of 3 different anti-HIV drug regimens given to HIV infected pregnant women during and after their pregnancies is most effective in reducing the incidence of nevirapine (NVP) resistance mutations. Blood levels of NVP and lopinavir/ritonavir (LPV/r) will also be studied. Study hypothesis: NVP resistance following single-dose NVP can be prevented with the concomitant administration of additional antiretroviral therapy (ART).

Racivir ® (RCV) is an experimental drug which means it is not approved for use by the United States Food and Drug Administration (FDA), but it can be used in research studies like this one. RCV (Racivir®) is part of a class of drugs known as "Nucleoside Reverse Transcriptase Inhibitors" (NRTIs), which are intended to block a further increase in the amount of HIV virus in the body. Laboratory research suggests that RCV (Racivir®) may be effective in patients who have developed resistance to other NRTIs, particularly 3TC (lamivudine, Epivir®). However, a study of RCV (Racivir®) has not been done with patients who have previously been treated with other HAART (Highly Active Antiretroviral Therapy -- taking multiple HIV drugs at once) medications including 3TC (lamivudine, Epivir®). The purpose of this study is to evaluate the safety and effectiveness of RCV (Racivir®) when used together with other HIV drugs in people who have previously been treated with 3TC (lamivudine, Epivir®) and are failing with their current HAART treatments. This study will include a total of 60 HIV infected, HAART-experienced subjects currently receiving 3TC (lamivudine, Epivir®) as part of their HAART therapy. The study will take place at approximately 11 study sites in the US and Latin America.

The purpose of this study is to try a known antiretroviral combination in HIV- infected children with only one intake a day, in order to simplify the prescription and improve adherence to treatment. This is what is called a phase II clinical trial, only recruiting and following a small number of children (50) during one year to evaluate the quantity of drug in the blood just before it is taken and one to three hours after it is taken. The other important objective is to study the tolerance of drugs in that mode of prescription of the triple combination.

This is an open-label safety study to provide early access to TMC114 for HIV-1 infected patients who have failed and exhausted regimens based on commercially available antiretroviral (ARV) therapy and who are ineligible for participation in any other Tibotec-sponsored trial.

The purpose of this study is to evaluate whether a therapy with an all once daily regimen of stavudine extended release (d4T XR), lamivudine (3TC), and efavirenz (EFV) leads to improved outcomes, as measured by viral load, CD4 counts, adherence, safety, and tolerability.