Cumulative Community-Level Lead Exposure and Pulse Pressure: The Normative Aging Study

作者：Todd S. Perlstein, Jennifer Weuve, Joel Schwartz, David Sparrow, Robert E. Wright, Augusto A. Litonjua, Huiling Nie, Howard Hu · 发表于：Environmental Health Perspectives · 年份：2007 · DOI：10.1289/ehp.10350 · 被引用次数：35 · 研究领域：Heavy Metal Exposure and Toxicity、Sodium Intake and Health、Bone health and osteoporosis research

BACKGROUND: Pulse pressure increases with age in industrialized societies as a manifestation of arterial stiffening. Lead accumulates in the vasculature and is associated with vascular oxidative stress, which can promote functional and structural vascular disease. OBJECTIVES: We tested the hypothesis that cumulative community-level lead exposure, measured with K-X-ray fluorescence, is associated with pulse pressure in a cohort of adult men. METHODS AND RESULTS: In a cross-sectional analysis of 593 men not treated with antihypertensive medication, tibia lead was positively associated with pulse pressure (p < 0.001). Adjusting for age, race, diabetes, family history of hypertension, education, waist circumference, alcohol intake, smoking history, height, heart rate, fasting glucose, and total cholesterol-to-HDL ratio, increasing quintiles of tibia lead remained associated with increased pulse pressure (ptrend = 0.02). Men with tibia lead above the median (19.0 microg/g) had, on average, a 4.2-mmHg (95% confidence interval, 1.9-6.5) higher pulse pressure than men with tibia lead level below the median. In contrast, blood lead level was not associated with pulse pressure. CONCLUSIONS: These data indicate that lead exposure may contribute to the observed increase in pulse pressure that occurs with aging in industrialized societies. Lead accumulation may contribute to arterial aging, perhaps providing mechanistic insight into the observed association of low-level lead exposure with...