Particle pollution in Rio de Janeiro, Brazil: increase and decrease of pro-inflammatory cytokines IL-6 and IL-8 in human lung cells

Environ Pollut. 2014 Nov:194:112-120. doi: 10.1016/j.envpol.2014.07.010. Epub 2014 Aug 6.

Abstract

Particle pollution from urban and industrialized regions in Rio de Janeiro (RJ), Brazil was analyzed for toxic and pro-inflammatory (cytokines: IL-6, IL-8, IL-10) responses in human bronchial epithelial cells. Trace elements contribution was studied. Airborne particulate matter was collected at: three industrial sites Ind-1 (PM10) and Ind-2a and 2b (PM2.5); Centro urban area (PM10) and two rural sites (PM2.5, PM10). PM10 acetone extracts were toxic and did not elicit cytokine release; aqueous extracts were less toxic and stimulated the release of IL-6 and IL-8. PM2.5 aqueous extracts from Ind-2 decreased the release of IL-6 and IL-8. Zinc concentration was higher at the industrial and rural reference sites (Ref-1-2) although metals were not associated to cytokines changes. These results demonstrate that PM from RJ can either increase or decrease cytokine secretion in vitro while being site specific and time dependent.

Keywords: BEAS-2B; Cytokines; Decrease; Industry; Metals; Particles.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Air Pollutants / analysis*
  • Air Pollutants / toxicity
  • Air Pollution / statistics & numerical data*
  • Brazil
  • Environmental Monitoring
  • Epithelial Cells / metabolism
  • Humans
  • Inhalation Exposure / statistics & numerical data*
  • Interleukin-6 / metabolism*
  • Interleukin-8 / metabolism*
  • Particulate Matter / analysis*
  • Particulate Matter / toxicity

Substances

  • Air Pollutants
  • Interleukin-6
  • Interleukin-8
  • Particulate Matter