View clinical trials related to HIV Infections.
Filter by:The aim is to investigate the hypothesis that IL7-receptor polymorphisms contribute to the differential immune recovery of CD4 + T cells following HAART
It remains unclear why some individuals are able to clear HBV from their bodies while in others HBV is a persistent infection. We plan to investigate this process by collecting blood and analysing how the patient's white blood cells respond to different pieces of the HBV virus. We will use new tools that can precisely tell us which component of the immune response may be different in individuals who are chronically infected with HBV and also in individuals who are also infected with HIV. The primary aims are therefore: 1. To characterize HBV-specific T cell responses in HBV chronic carriers, and identify novel immunogenic regions in both HLA-A2+ and non-HLA-A2+ individuals. 2. To determine the effect of HIV infection on HBV-specific T-cell responses
Identifying new approaches for preventing breastmilk transmission of HIV-1 is an important research priority. To this end, clinical trials are underway to evaluate the efficacy of HAART (zidovudine, lamivudine, nevirapine) during late pregnancy/lactation versus zidovudine/nevirapine peripartum for prevention of breastmilk HIV-1 transmission. It is important to understand the mechanism of effect of these antiretroviral (ARV) strategies on prevention of breastmilk HIV-1 transmission. This phase II trial will compare HAART vs peripartum zidovudine/nevirapine for effect on breastmilk HIV-1, breastmilk HIV-1 specific immune responses, and infant HIV-1 specific immune responses. 100 pregnant HIV-1 seropositive women in Nairobi with CD4 counts between 200 to 500 who have chosen to breastfeed will receive either ARV regimen. Mother-infant pairs will be followed for 1 year after delivery. Home visits will be conducted in the first month (~10 visits) to collect 2-5 mls of breastmilk per visit. Mother-infant pairs will be seen in the study clinic with maternal blood and breastmilk and infant blood collected at months 1, 3, and 6 for HIV-1 and HIV-1 Elispot assays. Breastmilk HIV-1 RNA and DNA levels will be quantified in Dr. Overbaugh's laboratory in Seattle and Elispot assays conducted in Nairobi with validation of a subset in Dr. Rowland-Jones laboratory in Oxford. Viral loads, decay curves, half-life, and re-population following ARV cessation will be estimated for each regimen and regimens compared. These studies will provide insight into the viral and immune responses to ARV regimens proposed for prevention of breastfeeding HIV-1 transmission and will be important for rational design of future interventions. After taking into account, estimated loss to follow-up, the targeted sample size with outcome data was 80 women, 40 in each trial arm, estimating undetectable breast milk HIV-1 RNA levels in the HAART arm and median breast milk HIV-1 RNA levels of 3.0 log10 in women receiving ZDV/NVP.
This study will evaluate the efficacy of two curricula relative to standard care. The first is a sexual risk avoidance curriculum for middle school students that included abstinence until marriage and complies with Title V Section 510 A-H abstinence education requirements. The second is a sexual risk reduction curriculum for middle school students that included abstinence and condom/contraceptive information and skills. Each intervention consists of an age-appropriate classroom curriculum and a CD-ROM-based tailored intervention delivered in 7th and 8th grade. The overall goal of the study is to identify common elements of effective sexuality education curricula that will be of benefit to youth.
The purpose of the study is to investigate the immune response to hepatitis C virus to determine why some people clear the virus and others develop chronic infection. Changes in immune response once hepatitis C therapy is begun will also be examined. If patients are also HIV+, the effect of antiretroviral therapy on the recovery of hepatitis C immunity will be investigated.
The purpose of this study is to determine whether the addition of zidovudine (ZDV) and lamivudine (3TC) at the onset of labor and for up to seven days postpartum to single-dose nevirapine (NVP) is associated with a lower prevalence of NVP-resistant HIV compared to single-dose NVP without ZDV+3TC.
This is a comparative clinical trial among HIV-infected women and their infants to determine: 1. the benefit of nutritional supplementation given to women during breastfeeding 2. the benefit and safety of antiretroviral (ARV) medications given either to infants or to their mothers to prevent HIV transmission during breastfeeding 3. the feasibility of exclusive breastfeeding followed by early, rapid breastfeeding cessation
The purpose of this study is to test whether a multi-component, community-level, HIV-prevention intervention is more effective than existing HIV prevention activities in reducing unprotected anal intercourse (UAI) among men ages 15-25 who have sex with men.
The purpose of this study is to determine if acyclovir episodic treatment has an effect in ulcer healing and if it should be added to the syndromic management of genital ulcer disease.
The purpose is to encourage Provider participants to evaluate high risk HIV transmission behaviors and offer prevention messages to their HIV+ patients which will, in turn, reduce rates of unprotected anal and/or vaginal sex with partners of known HIV sero-negativity or unknown HIV serostatus. It is hypothesized that patients of providers participating in the HIP intervention will report higher reduction in sexual risk practices, when compared to the patients of the providers who were randomized into the control condition.