Authors: Hogervorst, Janneke¹; de Kok, Theo²; Briedé, Jacob²; Wesseling, Geertjan³; Kleinjans, Jos²; van Schayck, Constant¹

Source: Journal of Toxicology and Environmental Health Part A, Volume 69, Number 3, February 2006 , pp. 245-262(18)

Publisher: Taylor and Francis Ltd

Abstract:

The mechanisms by which particulate matter (PM) produces adverse effects on the respiratory system, such as pulmonary dysfunction in children, are largely unknown. However, oxidative stress is thought to play an important role. Various chemical compounds in ambient particulate matter, including transition metals and aromatic organic compounds, may contribute to adverse effects through intrinsic generation of reactive oxygen species (ROS). It was hypothesized that ROS generation by PM, as determined through electron spin resonance (ESR) spectroscopy, may be negatively associated with pulmonary function in school children. PM 2.5 , PM 10 , and total suspended particulates (TSP) were sampled at the playgrounds of six elementary schools in the city of Maastricht, the Netherlands. All children (8–13 yr) from the six schools were asked to undergo spirometry. Multivariate linear regression models were constructed to evaluate associations between oxygen radical formation by PM and lung function. The radical-generating capacity per microgram PM correlated negatively to forced expiratory volume in 1 s (FEV 1 ) and forced expiratory flow at 50% (FEF 50% ) of forced vital capacity (FVC). The data indicate that chemical features that contribute to intrinsic generation of ROS may be relevant for PM risk assessment.

Document Type: Research article

DOI: http://dx.doi.org/10.1080/15287390500227431

Affiliations: 1: Research Institute CAPHRI 2: Department of Health Risk Analysis and Toxicology 3: Department of Pulmonology, Maastricht University, Maastricht, The Netherlands

Publication date: 2006-02-01

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