http://dx.doi.org/10.1016/j.jhazmat.2014.04.029">
 

Document Type

Journal Article

Department/Unit

Department of Biology

Title

Methionine oxidation in albumin by fine haze particulate matter: An in vitro and in vivo study

Language

English

Abstract

The potential effects of inhaled fine particulate matter (PM2.5), found in haze episodes, on the oxidation of the proteins in the lungs are not well understood. We investigated the effects of PM2.5 from haze episodes on protein oxidation. PM2.5 was collected from the air pollution in Beijing (BJ), Xian (XA), Xiamen (XM) and Hong Kong (HK) during a period of intensive haze episodes. The chemical characteristics of these samples and their effects on albumin oxidation were investigated. The levels of PM2.5 in BJ and XA were 4-6 times higher than in XM and HK. The concentrations of the polycyclic aromatic hydrocarbons (PAHs) components of the PM2.5 from BJ and XA were 10 times higher than those found in XM and HK. The haze PM2.5 increased oxidative stress. Addition of PM2.5 samples collected from haze episodes to albumin in vitro resulted in oxidation of methionine moieties; nasal instillation of PM2.5 suspensions in mice resulted in oxidation of methionine in the albumin in the bronchoalveolar lavage fluid. The methionine moieties participate in peptide chain crosslinking, and methionine oxidation in the albumin could be attributed to the PAH compounds. Our findings may be helpful in explaining the potential respiratory effects during haze episodes. © 2014 Elsevier B.V.

Keywords

Air pollution, Liquid chromatography-mass spectrometry, Polycyclic aromatic hydrocarbons, Protein structure, Pulmonary

Publication Date

2014

Source Publication Title

Journal of Hazardous Materials

Volume

274

Start Page

384

End Page

391

Publisher

Elsevier

ISSN (print)

03043894

ISSN (electronic)

18733336

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