Longitudinal Associations Between Ambient Air Pollution With Insulin Sensitivity, β-Cell Function, and Adiposity in Los Angeles Latino Children

Diabetes. 2017 Jul;66(7):1789-1796. doi: 10.2337/db16-1416. Epub 2017 Jan 30.

Abstract

Evidence suggests that ambient air pollution (AAP) exposure may contribute to the development of obesity and type 2 diabetes. The objective of this study was to determine whether exposure to elevated concentrations of nitrogen dioxide (NO2) and particulate matter with aerodynamic diameter <2.5 (PM2.5) had adverse effects on longitudinal measures of insulin sensitivity (SI), β-cell function, and obesity in children at high risk for developing diabetes. Overweight and obese Latino children (8-15 years; n = 314) were enrolled between 2001 and 2012 from Los Angeles, CA, and followed for an average of 3.4 years (SD 3.1 years). Linear mixed-effects models were fitted to assess relationships between AAP exposure and outcomes after adjusting for covariates including body fat percent. Higher NO2 and PM2.5 were associated with a faster decline in SI and a lower SI at age 18 years, independent of adiposity. NO2 exposure negatively affected β-cell function, evidenced by a faster decline in disposition index (DI) and a lower DI at age 18 years. Higher NO2 and PM2.5 exposures over follow-up were also associated with a higher BMI at age 18 years. AAP exposure may contribute to development of type 2 diabetes through direct effects on SI and β-cell function.

Publication types

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

MeSH terms

  • Adiposity
  • Adolescent
  • Air Pollution / statistics & numerical data*
  • Blood Glucose / metabolism
  • Body Mass Index
  • Child
  • Diabetes Mellitus, Type 2 / epidemiology
  • Diabetes Mellitus, Type 2 / metabolism
  • Environmental Exposure / statistics & numerical data*
  • Female
  • Hispanic Americans / statistics & numerical data*
  • Humans
  • Insulin / metabolism
  • Insulin Resistance*
  • Insulin-Secreting Cells / metabolism*
  • Linear Models
  • Longitudinal Studies
  • Los Angeles / epidemiology
  • Male
  • Nitrogen Dioxide*
  • Particulate Matter*
  • Pediatric Obesity / epidemiology*
  • Pediatric Obesity / metabolism

Substances

  • Blood Glucose
  • Insulin
  • Particulate Matter
  • Nitrogen Dioxide