Toxicology of Inhaled Ultrafine Particles and Engineered Nanomaterials
Our laboratory has focused for several years on the toxicology of inhaled ultrafine particles (UFPs), the most numerous size fraction of particulate air pollution. Interests include the impacts of age, gaseous co-pollutant exposure, and health status on the response(s) to inhaled UFPs. We are also interested in determining the basis for potential adverse effects of inhaled particles in the cardiovascular and central nervous systems.
This research focus has naturally led to our work with engineered nanomaterials. The research commonalities between UFP and nanomaterials are numerous, including the kinetics of tissue distribution following exposure, mechanisms of response related to oxidative stress, particle-protein interactions, and the physicochemical characteristics of the particles that determine response. Our research aims are met by using a combination of animal and cell culture models as well as detailed particle characterization.
In addition to looking for nanosized particles in tissues via chemical and microscopic means, responses are determined by measuring markers of inflammation and oxidative stress in the lung lining fluid, lung tissue, blood, circulating inflammatory cells, and extrapulmonary tissues (e.g. heart, liver, spleen, kidney, brain regions). We also have specific projects focused on cardiovascular stability and neurodegeneration following exposures to UFPs and nanomaterials.
Current Research Projects
- Toxicology of wear particles of cobalt-chromium alloy metal-on-metal hip implants Part I: physicochemical properties in patient and simulator studies.Nanomedicine. 11, 1201-15. (2015 Jul 01).
- Toxicology of wear particles of cobalt-chromium alloy metal-on-metal hip implants Part II: Importance of physicochemical properties and dose in animal and in vitro studies as a basis for risk assessment.Nanomedicine. 11, 1285-98. (2015 Jul 01).
- Nanomaterial categorization for assessing risk potential to facilitate regulatory decision-making.ACS Nano. 9, 3409-17. (2015 Apr 28).