Exposure to fine particles and ultrafine particles in contaminated Superfund soils or produced from thermal treatment of hazardous substances may present health hazards, such as the exacerbation of pulmonary and cardiovascular diseases. The program objective includes determining the involvement of particle-generated reactive oxygen species (ROS) and oxidative stress mechanisms in toxicities observed within target tissues. The Oxidative Stress Core will provide support for Non-biomedical Project 1 and Biomedical projects 2, 4 and 5. Project 1 will determine how the molecular pollutants react with surfaces to form environmentally-persistent free radicals (EPFR) and why they are stabilized. Critical to this effort is elucidating whether the particles themselves redox-cycle to generate ROS. The core will assist with measurements of ROS produced in particle systems in vitro. Project 5 will determine the role of cytochrome P450 in the initiation/exacerbation of particle-induced ROS production. The core will provide support for the measurements of ROS and lipid oxidation in lung microsomes isolated from UFP-treated rats. Projects 2 and 4 will assess the role of UFP in exacerbating ischemia-reperfusion injury in the heart, as well as chronic obstructive pulmonary disease, through mechanisms involving oxidative stress. The core will service these projects by conducting measurements of ROS production and oxidative stress. This proposal describes assays that will be conducted and expertise to be provided. We will utilize the most current technologies, but will also use well-established approaches to measuring the necessary endpoints. Importantly, the core will adapt to the changing needs of the projects and will develop new techniques as necessary. The core is well equipped with the necessary expertise and personnel, and all relevant instrumentation available in the core Leader's laboratory, including spectrophotometers, HPLC, and LC-MS/MS, will be made available to the core. The strengths of the core include the breadth of expertise of the Core Leader and personnel, the accessibility/cooperativity of the core personnel, and the strong collaboration already in place between the core and the described projects.
Oxygen is critical to life. However, in the cell, it can be converted to reactive forms that damage tissues and induce/exacerbate diseases. This condition, oxidative stress, is implicated in cancer, cardiovascular disease and aging. The Oxidative Stress Core will determine the role of oxidative stress in the exacerbation of diseases following exposure to airborne pollutants generated during thermal processing of organic wastes.
|Huang, Huaqiong; Saravia, Jordy; You, Dahui et al. (2015) Impaired gamma delta T cell-derived IL-17A and inflammasome activation during early respiratory syncytial virus infection in infants. Immunol Cell Biol 93:126-35|
|Park, Ji Won; Reed, James R; Brignac-Huber, Lauren M et al. (2014) Cytochrome P450 system proteins reside in different regions of the endoplasmic reticulum. Biochem J 464:241-9|
|Cormier, Stephania A; Shrestha, Bishwas; Saravia, Jordy et al. (2014) Limited type I interferons and plasmacytoid dendritic cells during neonatal respiratory syncytial virus infection permit immunopathogenesis upon reinfection. J Virol 88:9350-60|
|Lee, Greg I; Saravia, Jordy; You, Dahui et al. (2014) Exposure to combustion generated environmentally persistent free radicals enhances severity of influenza virus infection. Part Fibre Toxicol 11:57|
|Saravia, J; You, D; Thevenot, P et al. (2014) Early-life exposure to combustion-derived particulate matter causes pulmonary immunosuppression. Mucosal Immunol 7:694-704|
|Gehling, William; Khachatryan, Lavrent; Dellinger, Barry (2014) Hydroxyl radical generation from environmentally persistent free radicals (EPFRs) in PM2.5. Environ Sci Technol 48:4266-72|
|Kiruri, Lucy W; Khachatryan, Lavrent; Dellinger, Barry et al. (2014) Effect of copper oxide concentration on the formation and persistency of environmentally persistent free radicals (EPFRs) in particulates. Environ Sci Technol 48:2212-7|
|Schwingshackl, Andreas; Teng, Bin; Makena, Patrudu et al. (2014) Deficiency of the two-pore-domain potassium channel TREK-1 promotes hyperoxia-induced lung injury. Crit Care Med 42:e692-701|
|dela Cruz, Albert Leo N; Cook, Robert L; Dellinger, Barry et al. (2014) Assessment of environmentally persistent free radicals in soils and sediments from three Superfund sites. Environ Sci Process Impacts 16:44-52|
|Hettiarachchi, Suraj U; Prasai, Bijeta; McCarley, Robin L (2014) Detection and cellular imaging of human cancer enzyme using a turn-on, wavelength-shiftable, self-immolative profluorophore. J Am Chem Soc 136:7575-8|
Showing the most recent 10 out of 33 publications