Abstract
Highly active antiretroviral therapy (HAART) has significantly improved the prognosis of HIV-1-infected patients but is associated with significant side effects such as diabetes, atherosclerosis, and cardiovascular complications. Oxidative stress can disrupt endothelial homeostasis by dysregulating the balance between pro- and antiatherogenic factors. We hypothesized that chronic exposure to HAART results in endothelial oxidative stress and activation of mononuclear cell recruitment, an early event in atherosclerosis. We studied the effects of HAART drug combinations, consisting of zidovudine, a nucleoside reverse transcriptase inhibitor; efavirenz, a nonnucleosiee reverse transcriptase inhibitor; and either of the two protease inhibitors (PIs), indinavir or nelfinavir, on human aortic endothelial cells (HAECs) by monitoring the following parameters: (1) generation of reactive oxygen species (ROS), (2) mononuclear cell (Jurkat or U-937) adhesion, and (3) expression of cell adhesion molecules (CAMs). HAART exposure increased ROS formation in HAECs. Exposure to Pls alone and in HAART combinations increased mononuclear cell adhesion to HAECs in a concentration-dependent manner. Mononuclear cell adhesion to HAART-exposed HAECs was significantly enhanced following acute (24-h) exposure to the inflammatory cytokines, tumor necrosis factor (TNF)-α or interleukin (IL)-1β and was suppressed by the antioxidants N-acetylcysteine and glutathione. Exposure to HAART increased intercellular adhesion molecule-1 (ICAM-1) gene expression and concomitant exposure to TNF-α, further increased ICAM-1, vascular cell adhesion molecule-1 (VCAM-1), and endothelial-leukocyte adhesion molecule cell surface protein levels. These studies indicate that chronic HAART exposure increases oxidative stress in endothelial cells and induces mononuclear cell recruitment, which may eventually precipitate the cardiovascular disease observed in HIV-1+ individuals on antiretroviral therapy.
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Mondal, D., Pradhan, L., Ali, M. et al. HAART drugs induce oxidative stress in human endothelial cells and increase endothelial recruitment of mononuclear cells. Cardiovasc Toxicol 4, 287–302 (2004). https://doi.org/10.1385/CT:4:3:287
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DOI: https://doi.org/10.1385/CT:4:3:287