Repeated measures of inflammation, blood pressure, and heart rate variability associated with traffic exposures in healthy adults

Jaime E. Mirowsky, Richard E. Peltier, Morton Lippmann, George Thurston, Lung Chi Chen, Lucas Neas, David Diaz-Sanchez, Robert Laumbach, Jacqueline D. Carter, Terry Gordon

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Background: Previous human exposure studies of traffic-related air pollutants have demonstrated adverse health effects in human populations by comparing areas of high and low traffic, but few studies have utilized microenvironmental monitoring of pollutants at multiple traffic locations while looking at a vast array of health endpoints in the same population. We evaluated inflammatory markers, heart rate variability (HRV), blood pressure, exhaled nitric oxide, and lung function in healthy participants after exposures to varying mixtures of traffic pollutants. Methods: A repeated-measures, crossover study design was used in which 23 healthy, non-smoking adults had clinical cardiopulmonary and systemic inflammatory measurements taken prior to, immediately after, and 24 hours after intermittent walking for two hours in the summer months along three diverse roadways having unique emission characteristics. Measurements of PM2.5, PM10, black carbon (BC), elemental carbon (EC), and organic carbon (OC) were collected. Mixed effect models were used to assess changes in health effects associated with these specific pollutant classes. Results: Minimal associations were observed with lung function measurements and the pollutants measured. Small decreases in BP measurements and rMSSD, and increases in IL-1β and the low frequency to high frequency ratio measured in HRV, were observed with increasing concentrations of PM2.5 EC. Conclusions: Small, acute changes in cardiovascular and inflammation-related effects of microenvironmental exposures to traffic-related air pollution were observed in a group of healthy young adults. The associations were most profound with the diesel-source EC.

Original languageEnglish (US)
Article number66
JournalEnvironmental Health: A Global Access Science Source
Volume14
Issue number1
DOIs
StatePublished - Aug 15 2015

All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

Keywords

  • Air pollution
  • Biomarkers
  • Health effects
  • Traffic

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