Short-term exposure to ambient air pollution and circulating biomarkers of endothelial cell activation: The Framingham Heart Study

  • Wenyuan Li
  • , Kirsten S. Dorans
  • , Elissa H. Wilker
  • , Mary B. Rice
  • , Petter L. Ljungman
  • , Joel D. Schwartz
  • , Brent A. Coull
  • , Petros Koutrakis
  • , Diane R. Gold
  • , John F. Keaney
  • , Ramachandran S. Vasan
  • , Emelia J. Benjamin
  • , Murray A. Mittleman

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Background: Short-term exposure to air pollution has been associated with cardiovascular events, potentially by promoting endothelial cell activation and inflammation. A few large-scale studies have examined the associations and have had mixed results. Methods: We included 3820 non-current smoking participants (mean age 56 years, 54% women) from the Framingham Offspring cohort examinations 7 (1998–2001) and 8 (2005–2008), and Third Generation cohort examination 1 (2002–2005), who lived within 50 km of a central monitoring station. We calculated the 1- to 7-day moving averages of fine particulate matter (PM2.5), black carbon (BC), sulfate (SO42-), nitrogen oxides (NOx), and ozone before examination visits. We used linear mixed effect models for P-selectin, monocyte chemoattractant protein 1 (MCP-1), intercellular adhesion molecule 1, lipoprotein-associated phospholipase A2 activity and mass, and osteoprotegerin that were measured up to twice, and linear regression models for CD40 ligand and interleukin-18 that were measured once, adjusting for demographics, life style and clinical factors, socioeconomic position, time, and meteorology. Results: We found negative associations of PM2.5 and BC with P-selectin, of ozone with MCP-1, and of SO42- and NOx with osteoprotegerin. At the 5-day moving average, a 5 µg/m3 higher PM2.5 was associated with 1.6% (95% CI: − 2.8, − 0.3) lower levels of P-selectin; a 10 ppb higher ozone was associated with 1.7% (95% CI: − 3.2, − 0.1) lower levels of MCP-1; and a 20 ppb higher NOx was associated with 2.0% (95% CI: − 3.6, − 0.4) lower levels of osteoprotegerin. Conclusions: We did not find evidence of positive associations between short-term air pollution exposure and endothelial cell activation. On the contrary, short-term exposure to higher levels of ambient pollutants were associated with lower levels of P-selectin, MCP-1, and osteoprotegerin in the Framingham Heart Study.

Original languageEnglish (US)
Pages (from-to)36-43
Number of pages8
JournalEnvironmental Research
Volume171
DOIs
StatePublished - Apr 2019
Externally publishedYes

Keywords

  • Air pollution
  • Biomarker
  • Endothelial dysfunction
  • Environment
  • Epidemiology
  • Inflammation

ASJC Scopus subject areas

  • General Environmental Science
  • Biochemistry

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