Clinical Research Directory

Effectiveness and Safety of Darunavir/Cobicistat Plus Lamivudine Compared With Darunavir/Cobicistat Plus Tenofovir Alafenamide/Emtricitabine in Virologically Suppressed People Living With HIV at 24 and 48 Weeks of Follow-up

A single-center, open-label, randomized pilot clinical trial between March 2025 and March 2026 at the Hospital de Infectología "La Raza" National Medical Center in Mexico City. Eligible participants were adult males (≥18 years) with HIV-1 infection who had maintained virological suppression (HIV-1 RNA \<50 copies/mL) for 48 weeks on either DRV/c + 3TC or DRV/c + TDF/FTC prior to enrollment (TLALOC-1 trial), and had an estimated glomerular filtration rate (eGFR) by CKD-EPI ≥60 mL/min/1.73 m². The primary endpoints were virological efficacy and safety at 24 weeks.

Intestinal Tissue-Resident Memory T Cells and HIV-1 Persistence During Antiretroviral Therapy

The study aims to better characterize intestinal tissue-resident memory T cells (TRM) in people living with HIV-1 receiving suppressive antiretroviral therapy (ART). TRM cells are key components of tissue immunity and may contribute to HIV-1 persistence within the intestinal mucosa, a major viral reservoir. The phenotypic, transcriptomic, and functional characteristics of intestinal CD4+ and CD8+ TRM cells, their susceptibility to HIV-1 infection, and their potential role as viral reservoirs will be investigated. Blood samples and additional colonic biopsies obtained during routine clinically indicated colonoscopy will be collected from HIV-1-infected participants and HIV-seronegative controls.

Impacts of HIV Treatment Regimens on Archived Drug Resistance

The study aims to determine the prevalence of drug resistance mutation (DRM) in virally suppressed HIV infection, and the impacts of regimen change and the presence of low level viremia. Adults living with HIV infection on antiretroviral therapy (ART) with full viral suppression would be recruited. Cases are patients planning for regimen switch, while controls are those with and without low level viraemia (LLV) not planned for switch. Blood samples would be collected before and after switch. Sequencing would be performed to identify DRM present in HIV-1 proviral DNA.

HIV Transmission in the Era of Scaling up Antiretroviral Therapy in Ethiopia

The goal of this observational study is to understand patterns of HIV transmission in a high-prevalence area in Ethiopia, and to compare viral genetic information in people with HIV who are newly diagnosed and have not been exposed to antiretroviral therapy with persons receiving antiretroviral therapy without viral suppression. The main questions it aims to answer are: * Do people with HIV who fail to achieve viral suppression contribute to the ongoing spread of HIV in Ethiopia, or does HIV transmission mainly occur between persons with no exposure to such therapy? * Are viruses with drug-resistance mutations transmitted onwards from people with HIV receiving antiretroviral therapy who fail to achieve viral suppression? \* Which factors are involved in treatment failure and emergence of drug-resistant viruses longitudinally? Participants will be enrolled with regard to history of antiretroviral therapy exposure (newly diagnosed/treatment-naïve vs. treatment-experienced with lack of viral suppression), using persons on antiretroviral therapy with viral suppression for control. We will compare the following outcomes between these groups: * Clustering of viral genetic sequences at inclusion (implying linked transmission) * Prevalence of drug-resistance-associated mutations at inclusion * Viral suppression and emergence of drug-resistance mutations during follow-up