Increased aluminum and lithium and decreased zinc levels in plasma is related to cognitive impairment in workers at an aluminum factory in China: A cross-sectional study

蒙特利尔认知评估 认知 锂(药物) 心理学 工作记忆 贝叶斯多元线性回归 横断面研究 线性回归 化学 听力学 认知障碍 医学 统计 数学 精神科
作者
Nan Shang,Lan Zhang,Shuo Wang,Tao Huang,Yan‐Hong Wang,Xiaocheng Gao,Shimeng Xu,Jingqi Zhang,Ling Zhang,Qiao Niu,Qinli Zhang
出处
期刊:Ecotoxicology and Environmental Safety [Elsevier]
卷期号:214: 112110-112110 被引量:30
标识
DOI:10.1016/j.ecoenv.2021.112110
摘要

Previous studies have shown that multiple imbalances of metal ions in the brain are closely associated with the neurodegenerative disorders. Our studies have shown that long-term working exposure to aluminum induces increased plasma aluminum levels and causes cognitive impairment in workers at aluminum factories. To explore the levels of nine metals in plasma and the effect on cognitive function among in-service workers. In this cross-sectional study, cognitive function was assessed using the Montreal Cognitive Assessment (MoCA), which included seven subitems: executive/visuospatial abilities; naming; attention and calculation; language; abstract; recall; and orientation. The plasma levels of nine kinds of metals were measured by inductively coupled plasma-mass spectrometry (ICP-MS). A multivariate generalized linear regression model and Bayesian kernel machine regression (BKMR) were selected to estimate the relationship between metal plasma level and MoCA scores with adjustment for confounders. One hundred and eighty-seven workers participated in this study. In the multivariable generalized linear model, among these nine metals studied, five were related to the MoCA score: aluminum, lithium, cobalt, zinc and chromium. In the BKMR model, a significantly negative correlation between the plasma aluminum, lithium and the total MoCA score was observed. Moreover, for subitems on the MoCA scale, the plasma levels of lithium, aluminum, and zinc had a significant correlation with the executive/visuospatial abilities, naming, and orientation abilities, respectively. The log-transformation concentrations of plasma aluminum and lithium were negatively correlated with the executive/visuospatial abilities and naming abilities, respectively. The log-transformation plasma zinc concentration was positively correlated with orientation abilities. Based on the results, we determined that increased aluminum and lithium and decreased zinc levels in plasma were associated with the incidence of mild cognitive impairment (MCI) in workers at a Chinese aluminum plant.

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