@article {7663, title = {Outdoor air pollution and mosaic loss of chromosome Y in older men from the Cardiovascular Health Study.}, journal = {Environ Int}, volume = {116}, year = {2018}, month = {2018 Apr 23}, pages = {239-247}, abstract = {

BACKGROUND: Mosaic loss of chromosome Y (mLOY) can occur in a fraction of cells as men age, which is potentially linked to increased mortality risk. Smoking is related to mLOY; however, the contribution of air pollution is unclear.

OBJECTIVE: We investigated whether exposure to outdoor air pollution, age, and smoking were associated with mLOY.

METHODS: We analyzed baseline (1989-1993) blood samples from 933 men >=65 years of age from the prospective Cardiovascular Health Study. Particulate matter <=10 μm (PM), carbon monoxide, nitrogen dioxide, sulfur dioxide, and ozone data were obtained from the U.S. EPA Aerometric Information Retrieval System for the year prior to baseline. Inverse-distance weighted air monitor data were used to estimate each participants{\textquoteright} monthly residential exposure. mLOY was detected with standard methods using signal intensity (median log-R ratio (mLRR)) of the male-specific chromosome Y regions from Illumina array data. Linear regression models were used to evaluate relations between mean exposure in the prior year, age, smoking and continuous mLRR.

RESULTS: Increased PM was associated with mLOY, namely decreased mLRR (p-trend = 0.03). Compared with the lowest tertile (<=28.5 μg/m), the middle (28.5-31.0 μg/m; β = -0.0044, p = 0.09) and highest (>=31 μg/m; β = -0.0054, p = 0.04) tertiles had decreased mLRR, adjusted for age, clinic, race/cohort, smoking status and pack-years. Additionally, increasing age (β = -0.00035, p = 0.06) and smoking pack-years (β = -0.00011, p = 1.4E-3) were associated with decreased mLRR, adjusted for each other and race/cohort. No significant associations were found for other pollutants.

CONCLUSIONS: PM may increase leukocyte mLOY, a marker of genomic instability. The sample size was modest and replication is warranted.

}, issn = {1873-6750}, doi = {10.1016/j.envint.2018.04.030}, author = {Wong, Jason Y Y and Margolis, Helene G and Machiela, Mitchell and Zhou, Weiyin and Odden, Michelle C and Psaty, Bruce M and Robbins, John and Jones, Rena R and Rotter, Jerome I and Chanock, Stephen J and Rothman, Nathaniel and Lan, Qing and Lee, Jennifer S} }