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Interaction of Sirtuin 1 (SIRT1) Candidate Longevity Gene and Particulate Matter (PM2.5) on All-Cause Mortality: A Longitudinal Cohort Study in China

Citation

Yao, Yao; Liu, Linxin; Guo, Guang; Zeng, Yi; & Ji, John S. (2021). Interaction of Sirtuin 1 (SIRT1) Candidate Longevity Gene and Particulate Matter (PM2.5) on All-Cause Mortality: A Longitudinal Cohort Study in China. Environmental Health, 20(1), 25. PMCID: PMC7958462

Abstract

BACKGROUND: The SIRT1 gene was associated with the lifespan in several organisms through inflammatory and oxidative stress pathways. Long-term air particulate matter (PM) is detrimental to health through the same pathways.
METHODS: We used the Chinese Longitudinal Healthy Longevity Survey (CLHLS) to investigate whether there is a gene-environment (G × E) interaction of SIRT1 and air pollution on mortality in an older cohort in China. Among 7083 participants with a mean age of 81.1 years, we genotyped nine SIRT1 alleles for each participant and assessed PM(2.5) concentration using 3-year average concentrations around each participant's residence. We used Cox-proportional hazards models to estimate the independent and joint effects of SIRT1 polymorphisms and PM(2.5) exposure on all-cause mortality, adjusting for a set of confounders.
RESULTS: There were 2843 deaths over 42,852 person-years. The mortality hazard ratio (HR) and 95% confidence interval (CI) for each 10 μg/m(3) increase in PM(2·5) was 1.08 (1.05-1.11); for SIRT1_391 was 0.77 (0.61, 0.98) in the recessive model after adjustment. In stratified analyses, participants carrying two SIRT1_391 minor alleles had a significantly higher HR for each 10 μg/m(3) increase in PM(2.5) than those carrying zero minor alleles (1.323 (95% CI: 1.088, 1.610) vs. 1.062 (1.028, 1.096) p for interaction = 0.03). Moreover, the interaction of SIRT1 and air pollution on mortality is significant among women but not among men. We did not see significant relationships for SIRT1_366, SIRT1_773, and SIRT1_720.
CONCLUSION: We found a gene-environment interaction of SIRT1 and air pollution on mortality, future experimental studies are warranted to depict the mechanism observed in this study.

URL

http://dx.doi.org/10.1186/s12940-021-00718-x

Reference Type

Journal Article

Article Type

Regular

Year Published

2021

Journal Title

Environmental Health

Author(s)

Yao, Yao
Liu, Linxin
Guo, Guang
Zeng, Yi
Ji, John S.

PMCID

PMC7958462

Data Set/Study

Chinese Longitudinal Healthy Longevity Study (CLHLS)

Continent/Country

China