A review of effects of particulate matter-associated nickel and vanadium species on cardiovascular and respiratory systems

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Abstract
Many epidemiological investigations indicate that excess risks of mortality and morbidity may vary among specific PM2.5 components. Nickel (Ni) and vanadium (V) particulate metal species may potentially be related to increasing respiratory and cardiovascular mortality and morbidity. This review focuses on exposure concentrations of these two species in various settings, their health effects based on epidemiological and toxicological studies and the underlying mechanisms. The evidence shows that environmental exposure concentrations of Ni and V in general setting are lower than the World Health Organization standard (V, 1 μg/m3/day) in 2000, or the European Environment Agency standard (Ni, 1 μg/m3/day) in 2003, but their associations with cardiopulmonary diseases can still be found. The toxicological mechanism can be explained by laboratory-based studies. Updated safe guidelines on environmental and human exposure of Ni and V are necessary in order to clarify the associations between them and cardiopulmonary diseases and provide environmental intervention policies.

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