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Browse 3,256 clinical trials for hiv/aids. Find studies that match your criteria and connect with research centers.
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NCT03207945
Atherosclerosis in the setting of HIV infection is distinct and includes increased vascular inflammation, worsened endothelial function, and a predominance of non-calcified plaque. These outcomes can be assessed using specialized noninvasive imaging which strongly predict future CV events in the general population. PCSK9 has emerged as an important pharmacologic target for cholesterol lowering in the general population and recent studies among individuals without HIV have shown that PCSK9 inhibitor therapy is safely tolerated and significantly reduces major CV events in the general population. The investigators will perform a clinical trial of PCSK9 inhibition in the setting of HIV infection. This will be a randomized, placebo-controlled study to evaluate the effects of PCSK9 inhibition on vascular inflammation, endothelial function, and non-calcified plaque using a PCSK9 inhibitor called alirocumab. This study will recruit 140 treated individuals with HIV who are aged 40 and older, with known CVD or risk factors for CVD and who have evidence of vascular inflammation at baseline. The primary and secondary objective of this study is to determine whether PCSK9 inhibition can improve arterial inflammation as assessed by FDG-PET/CT and endothelial function as assessed by flow mediated vasodilation. The investigators will correlate changes in arterial inflammation and endothelial function with lipids and markers of inflammation and immune activation. The tertiary objective is to perform a pilot evaluation of the impact of PCSK9 inhibition on non-calcified plaque as measured by coronary CT angiography. Non-calcified plaque measurements will be correlated with changes in lipid parameters and markers of inflammation and immune activation.
NCT05454839
With the advent of universal eligibility for HIV treatment ("treat all") and same-day and community-based antiretroviral therapy (ART) initiation, retention in care after a patient has started ART remains the main challenge to achieving optimal outcomes in HIV treatment programs. Consistently across both time and geography, the highest risk for loss from care is during a patient's first six months after ART initiation, with about quarter of all patients not retained by the end of month 6. One of the reasons for the high attrition from care in this early retention period is that the model of care offered to most newly-initiating and re-initiating patients has barely evolved from its original outlines. Patients in their first six months on ART are generally not eligible for lower-intensity, patient-centered "differentiated service delivery" models that make remaining in care easier for experienced patients. Instead, most early patients must still make multiple clinic visits that include clinical consultations with providers, and most can receive only 1-2 month supplies of medications at a time. This protocol is for the PREFER-South Africa study, an activity of the Retain6 project. Retain6 aims to develop new models of care for patients' first six months on ART. PREFER-South Africa will collect data on patients' characteristics, clinical and non-clinical needs, and preferences for different types of services during their first six months after initiating ART. The investigators will conduct an observational, prospective cohort survey of newly-initiated or re-initiated adult ART patients at a selected set of 18 healthcare facilities in South Africa. Results are expected to inform the design of better models of service delivery for the early treatment period.