Long-term exposure to arsenic, and the co-occurrence of uranium, in public and private drinking water: associations with cardiovascular and chronic kidney diseases in the California Teachers Study

公共和私人饮用水中长期接触砷以及同时存在铀:加州教师研究中与心血管和慢性肾脏疾病的关联

基本信息

  • 批准号:
    10677410
  • 负责人:
  • 金额:
    $ 3.47万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-09-01 至 2026-08-31
  • 项目状态:
    未结题

项目摘要

PROJECT SUMMARY/ABSTRACT The overarching objective of this proposal is to evaluate changes in levels of arsenic and uranium in public and private drinking water over several decades across the state of California, and to elucidate the relationship between long-term exposure to these contaminants and the risk of cardiovascular diseases (stroke, acute myocardial infarction) and chronic kidney disease in a large prospective cohort. Inorganic arsenic (As) naturally occurs in soil and groundwater globally. While arsenic in drinking water (wAs) is regulated in US community water supplies, the maximum contaminant level was recently reduced and enforced beginning in the early 2000s. Rural populations, however, rely on private wells which are not regulated for contaminants and may contain higher levels of wAs found in groundwater. Exposure to As has been linked to systemic inflammation and endothelial dysfunction, as well as kidney damage. A limited but growing body of evidence suggests that low-to-moderate levels of wAs present in the US increases the risk of cardiovascular disease (CVD) outcomes, including stroke and myocardial infarction. Few epidemiologic studies have evaluated the association between wAs and chronic kidney disease (CKD), a prevalent disease found at higher rates of unknown cause in some rural regions of California. Another drinking water contaminant, uranium (wU), which naturally occurs in groundwater, shares similar toxicologic properties to wAs and is particularly nephrotoxic. Given wU may co- occur with wAs, exposure to elevated levels of both contaminants may exacerbate the risk of CVD and CKD. In collaboration with the California Office of Environmental Health Hazard Assessment, a geospatial dataset of annual wAs and wU levels (1990-2020) has been developed using measurements from community water supplies and private wells, and spatially allocated to water system boundaries and private groundwater grids (1x1 mile grids), respectively. Our study proposes to first evaluate spatiotemporal trends and the co- occurrence of wAs and wU in community water supplies and private wells across California. We will leverage the geospatial dataset to estimate long-term residential drinking water levels of wAs and wU for participants in the California Teachers Study cohort (enrolled in 1995-96). We will conduct two epidemiologic studies evaluating the association between exposure to wAs and the prospective risks of CVD (including stroke and acute myocardial infarction) and CKD (stage 3 CKD to end stage renal disease) incidence/mortality. We will assess whether risk is greater for participants with the highest exposure levels of both wAs and wU. In summary, our study will describe trends in wAs and wU over time for both public and private water sources, identify regions in California with elevated exposure, as well as contribute to limited knowledge about exposure to low-to-moderate wAs levels and joint exposure to wU and the risks of CVD and CKD in the US.
项目摘要/摘要 这项建议的总体目标是评估公共场所和公共场所的砷和铀水平的变化 加利福尼亚州几十年来的私人饮用水,并阐明两者之间的关系 长期接触这些污染物与心血管疾病风险(中风、急性 在一个较大的前瞻性队列中,研究对象包括心肌梗死)和慢性肾脏疾病。天然无机砷(As) 出现在全球土壤和地下水中。而饮用水中的砷在美国社区是受监管的 在供水方面,最近降低了最高污染物水平,并从2008年初开始强制执行 2000年代。然而,农村人口依赖于私人水井,这些水井不受污染物监管,而且可能 在地下水中发现了更高水平的铅。暴露于AS与全身炎症有关 和内皮功能障碍,以及肾脏损伤。数量有限但不断增加的证据表明 在美国,低到中等水平的维生素A会增加心血管疾病(CVD)的风险, 包括中风和心肌梗塞。很少有流行病学研究评估两者之间的联系 和慢性肾脏疾病(CKD),这是一种在一些原因不明的情况下发现的较高比率的流行疾病 加利福尼亚州的农村地区。另一种饮用水污染物铀(吴),天然存在于 地下水具有与过去相似的毒理学特性,而且特别具有肾毒性。鉴于吴某可能-- 与风湿病一起发生时,暴露于这两种污染物水平升高可能会加剧心血管疾病和慢性肾脏病的风险。在……里面 与加州环境健康危险评估办公室合作,一个地理空间数据集 根据对社区水的测量,得出了每年的风能和水温水平(1990-2020) 供水和私人水井,并在空间上分配给供水系统边界和私人地下水网格 (1x1英里栅格)。我们的研究建议首先评估时空趋势和联合 在加利福尼亚州的社区供水和私人水井中出现了Was和Wu。我们将利用 该地理空间数据集用于估计以下项目的参与者的长期住宅饮用水水平 加州教师研究队列(1995-96年注册)。我们将进行两项流行病学研究 评估暴露于风湿性心脏病和心血管疾病(包括中风和 急性心肌梗死)和慢性肾脏病(CKD 3期至终末期肾病)的发病率/死亡率。我们会 评估暴露水平最高的参与者是否有更大的风险。在……里面 总结,我们的研究将描述公共和私人水源随时间的变化趋势, 确定加州暴露水平较高的地区,并提供有关暴露水平的有限知识 到低到中等的水平和联合暴露于吴某以及美国的心血管疾病和慢性肾脏病的风险。

项目成果

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