Details

Autor(en) / Beteiligte

• Koenigsberg, Sarah H.
• Chang, Che-Jung
• Ish, Jennifer
• Xu, Zongli
• Kresovich, Jacob K.
• Lawrence, Kaitlyn G.
• Kaufman, Joel D.
• Sandler, Dale P.
• Taylor, Jack A.
• White, Alexandra J.

Titel

Air pollution and epigenetic aging among Black and White women in the US

Ist Teil von

• Environment international, 2023-11, Vol.181, p.108270-108270, Article 108270

Ort / Verlag

Netherlands: Elsevier Ltd

Erscheinungsjahr

2023

Quelle

MEDLINE

Beschreibungen/Notizen

• [Display omitted] •Novel findings of air pollution and DNA methylation patterns in Black women.•Black women had higher exposure to NO2 and PM than non-Hispanic White (NHW) women.•PM10 and NO2 were associated with higher biological aging in Black women.•Little evidence of associations among NHW women.•Identified 20 CpGs where DNA methylation was associated with NO2 or PM2.5. DNA methylation-based measures of biological aging have been associated with air pollution and may link pollutant exposures to aging-related health outcomes. However, evidence is inconsistent and there is little information for Black women. We examined associations of ambient particulate matter <2.5 μm and <10 μm in diameter (PM2.5 and PM10) and nitrogen dioxide (NO2) with DNA methylation, including epigenetic aging and individual CpG sites, and evaluated whether associations differ between Black and non-Hispanic White (NHW) women. Validated models were used to estimate annual average outdoor residential exposure to PM2.5, PM10, and NO2 in a sample of self-identified Black (n=633) and NHW (n=3493) women residing in the contiguous US. We used sampling-weighted generalized linear regression to examine the effects of pollutants on six epigenetic aging measures (primary: DunedinPACE, GrimAgeAccel, and PhenoAgeAccel; secondary: Horvath intrinsic epigenetic age acceleration [EAA], Hannum extrinsic EAA, and skin & blood EAA) and epigenome-wide associations for individual CpG sites. Wald tests of nested models with and without interaction terms were used to examine effect measure modification by race/ethnicity. Black participants had higher median air pollution exposure than NHW participants. GrimAgeAccel was associated with both PM10 and NO2 among Black participants, (Q4 versus Q1, PM10: β=1.09, 95% CI: 0.16–2.03; NO2: β=1.01, 95% CI 0.08–1.94) but not NHW participants (p-for-heterogeneity: PM10=0.10, NO2=0.20). In Black participants, we also observed a monotonic exposure–response relationship between NO2 and DunedinPACE (Q4 versus Q1, NO2: β=0.029, 95% CI: 0.004–0.055; p-for-trend=0.03), which was not observed in NHW participants (p-for-heterogeneity=0.09). In the EWAS, pollutants were significantly associated with differential methylation at 19 CpG sites in Black women and one in NHW women. In a US-wide cohort study, our findings suggest that air pollution is associated with DNA methylation alterations consistent with higher epigenetic aging among Black, but not NHW, women.