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Physical activity, black carbon exposure, and DNA methylation in the FOXP3 promoter

Stephanie Lovinsky-Desir; Kyung Hwa Jung; Jacqueline R. Jezioro; David Z. Torrone; Mariangels de Planell Saguer; Beizhan Yan; Frederica P. Perera; Andrew G. Rundle; Matthew S. Perzanowski; Steven N. Chillrud; Rachel L. Miller

Title:
Physical activity, black carbon exposure, and DNA methylation in the FOXP3 promoter
Author(s):
Lovinsky-Desir, Stephanie
Jung, Kyung Hwa
Jezioro, Jacqueline R.
Torrone, David Z.
de Planell Saguer, Mariangels
Yan, Beizhan
Perera, Frederica P.
Rundle, Andrew G.
Perzanowski, Matthew S.
Chillrud, Steven N.
Miller, Rachel L.
Date:
Type:
Articles
Department(s):
Pediatrics
Medicine
Lamont-Doherty Earth Observatory
Neurology
Environmental Health Sciences
Epidemiology
Volume:
9
Persistent URL:
Book/Journal Title:
Clinical Epigenetic
Abstract:
Background Physical activity is associated with improvement in lung function; however, pollution exposure during physical activity can lead to a transient reduction in lung function. This paradoxical relationship may be linked to altered T regulatory (Treg) cell activity, which increases with exercise and suppresses airway inflammation, but decreases in association with exposure to air pollution. To clarify these relationships, we investigated buccal cell DNA methylation of the forkhead box p3 (FOXP3) gene promoter, a proposed biomarker of Treg activity. We hypothesized that active urban children would have lower FOXP3 promoter methylation, associated with better lung function compared to non-active children. We also hypothesized that this relationship would be attenuated by high exposure to the air pollutant black carbon (BC). Methods We performed a cross-sectional study of 135 children ages 9–14 who live in New York City. Activity was measured across 6 days. BC exposure was assessed by personal monitors worn for two 24-h periods, followed by lung function assessment. Buccal swabs were collected for DNA methylation analysis of three regions (six CpG sites) in the FOXP3 promoter. Results In multivariable regression models, overall, there was no significant relationship between physical activity and FOXP3 promoter methylation (p > 0.05). However, in stratified analyses, among children with higher BC exposure (≥1200 ng/m3), physical activity was associated with 2.37% lower methylation in promoter 2 (CpGs −77, −65, and −58) (β estimate = −2.37%, p < 0.01) but not among those with lower BC exposure (β estimate = 0.54%, p > 0.05). Differences across strata were statistically significant (p interaction = 0.04). Among all children, after controlling for BC concentration, promoter 2 methylation was associated with reduced FEV1/FVC (β estimate = −0.40%, p < 0.01) and reduced FEF25–75% (β estimate = −1.46%, p < 0.01). Conclusions Physical activity in urban children appeared associated with lower FOXP3 promoter methylation, a possible indicator of greater Treg function, under conditions of high BC exposure. Reduced FOXP3 promoter methylation was associated with higher lung function. These findings suggest that physical activity may induce immunologic benefits, particularly for urban children with greater risk of impaired lung function due to exposure to higher air pollution. FOXP3 promoter buccal cell methylation may function as a useful biomarker of that benefit.
Subject(s):
DNA--Methylation
Forkhead transcription factors
Air--Pollution--Health aspects
Spirometry
Publisher DOI:
https://doi.org/10.1186/s13148-017-0364-0
Item views
42
Metadata:
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Suggested Citation:
Stephanie Lovinsky-Desir, Kyung Hwa Jung, Jacqueline R. Jezioro, David Z. Torrone, Mariangels de Planell Saguer, Beizhan Yan, Frederica P. Perera, Andrew G. Rundle, Matthew S. Perzanowski, Steven N. Chillrud, Rachel L. Miller, , Physical activity, black carbon exposure, and DNA methylation in the FOXP3 promoter, Columbia University Academic Commons, .

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