Short-Term Exposure to Urban Air Pollution and Influences on Placental Vascularization Indexes

Author(s)

Hettfleisch, Karen ; Bernardes, Lisandra Stein ; Carvalho, Mariana Azevedo ; Manfre Pastro, Luciana Duzolina ; Vieira, Sandra Elisabete ; Saldiva, Silvia R. D. M. ; Saldiva, Paulo ; Vieira Francisco, Rossana Pulcineli

• Document type: Journal article
• Source: ENVIRONMENTAL HEALTH PERSPECTIVES; v. 125, n. 4, p. 753-759, APR 2017.
• Web of Science Citations: 12

Abstract

Background: It has been widely demonstrated that air pollution can affect human health and that certain pollutant gases lead to adverse obstetric outcomes, such as preeclampsia and fetal growth restriction. Objectives: We evaluated the influence of individual maternal exposure to air pollution on placental volume and vascularization evaluated in the first trimester of pregnancy. Methods: This was a cross-sectional study on low-risk pregnant women living in Sao Paulo, Brazil. The women carried passive personal NO2 and O-3 monitors in the week preceding evaluation. We employed the virtual organ computer-aided analysis (VOCAL) technique using three-dimensional power Doppler ultrasound to evaluate placental volume and placental vascular indexes {[}vascularization index (VI), flow index (FI), and vascularization flow index (VFI)]. We analyzed the influence of pollutant levels on log-transformed placental vascularization and volume using multiple regression models. Results: We evaluated 229 patients. Increased NO2 levels had a significant negative association with log of VI (p = 0.020 and beta = -0.153) and VFI (p = 0.024 and beta = -0.151). NO2 and O-3 had no influence on the log of placental volume or FI. Conclusions: NO2, an estimator of primary air pollutants, was significantly associated with diminished VI and VFI in the first trimester of pregnancy. (AU)

• FAPESP's process: 08/57717-6 - National Institute for Integrated Analysis of Environmental Risk
• Grantee: Thais Mauad
• Support Opportunities: Research Projects - Thematic Grants