Exposure to different fractions of diesel exhaust PM2.5 induces different levels of pulmonary inflammation and acute phase response.

Abstract:

AIM:Ambient fine particulate matter (PM2.5) consists of various components, and their respective contributions to the toxicity of PM2.5 remains to be determined. To provide specific recommendations for preventing adverse effects due to PM2.5 pollution, we determined whether the induction of pulmonary inflammation, the putative pathogenesis for the morbidity and mortality due to PM2.5 exposure, was fractioned through solubility-dependent fractioning. METHODS:In the present study, the water and heptane solubilities-dependent serial fractioning of diesel exhaust particulate matter (DEP), a prominent source of urban PM2.5 pollution, was performed. The pro-inflammatory actions of these resultant fractions were then determined using both an intratracheal instillation mouse model and cultured BEAS-2B cells, a human bronchial epithelial cell line. RESULTS:Instillation of the water-insoluble, but not -soluble fraction elicited significant pulmonary inflammatory and acute phase responses, comparable to those induced by instillation of DEP. The water-insoluble fraction was further fractioned using heptane, a polar organic solvent, and instillation of heptane-insoluble, but not -soluble fraction elicited significant pulmonary inflammation and acute phase responses. Furthermore, we showed that DEP and water-insoluble DEP, but not water-soluble DEP, activated pro-inflammatory signaling in cultured BEAS-2B cells, ruling out the possibility that the solubility impacts the in vivo distribution and thus the pulmonary inflammatory response.

journal_name

Ecotoxicol Environ Saf

authors

Tao S,Xu Y,Chen M,Zhang H,Huang X,Li Z,Pan B,Peng R,Zhu Y,Kan H,Li W,Ying Z

doi

10.1016/j.ecoenv.2020.111871

subject

Has Abstract

pub_date

2021-03-01 00:00:00

pages

111871

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(20)31707-3

journal_volume

210

pub_type

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