Cardiopulmonary Risk Assessment from Smoke Exposure at the Wildland Urban Interface

项目总结 急性和慢性吸入野地火灾烟雾与死亡率增加和呼吸系统疾病有关。 和心血管发病率，尽管暴露的频率和持续时间或 烟雾的化学成分和颗粒物对观察到的健康影响的影响尚不清楚。作为 荒地火灾的发生和居住在荒地城市界面(WUI)的人数继续 增加，长期吸入野地火灾烟雾对公众健康构成严重威胁。正因为如此，那里 是否迫切需要更好地了解与接触放射性物质有关的不良心肺后果 荒野的城市烟雾。WUI野地大火产生的烟雾是一种复杂的气体混合物， 痕量金属，以及微细和超细颗粒。后者对人类健康尤其危险，因为它们 沉积在肺的深部区域，并可能转移到血流中，增加氧化和 炎症负担，无论是局部的还是系统的。长期的炎症会导致 阻塞性肺病和动脉粥样硬化。为了调查暴露在WUI烟雾和 对于心肺功能障碍的发展，我们的跨学科团队汇集了火灾方面的专业知识 发生和特征、啮齿动物气溶胶暴露、呼吸力学、肺部生物学和 心血管生理学。为了实现我们的目标，我们将使用具有代表性的材料制造实验室规模的烟雾 在南加州的WUI地区，我们将把它传递给MICE。在目标1中，我们将调查 暴露的频率和持续时间，以及野地火灾烟雾的颗粒浓度。在AIM 2、我们将重点研究不同燃料源对WUI的相对贡献。此外，由于 作为这一早期调查员项目的一部分，PI和共同信息系统将产生一个外部咨询小组 由吸入毒理学研究人员、公共健康倡导者和消防专家组成。 向社会传播从这项建议中获得的新知识将是这项工作的重要组成部分 努力吧。

PROJECT SUMMARY Acute and chronic wildland fire smoke inhalation have been linked to increased mortality as well as respiratory and cardiovascular morbidity, though the extent to which the frequency and duration of exposure or the chemical and particle profiles of the smoke contribute to the observed health effects remains unknown. As the occurrences of wildland fires and number of people living at the wildland urban interface (WUI) continue to increase, prolonged inhalation of wildland fire smoke poses a serious threat to public health. Due to this, there is an urgent need to better understand the adverse cardiopulmonary outcomes associated with the exposure to wildland urban smoke. The smoke that arises from wildland fires at the WUI is a complex mixture of gases, trace metals, and fine and ultrafine particles. The latter are particularly dangerous for human health, since they deposit in the deep regions of the lungs and may translocate into the blood stream, increasing the oxidative and inflammatory burden, both locally and systemically. Prolonged inflammation can lead to the development of obstructive lung disease and atherosclerosis. To investigate the link between exposure to WUI smoke and development of cardiopulmonary dysfunction, our interdisciplinary team brings together expertise in fire generation and characterization, rodent aerosol exposures, respiratory mechanics, lung biology, and cardiovascular physiology. To fulfill our goals, we will create lab-scale smoke using materials representative of WUI regions in Southern California and we will deliver it to mice. In Aim 1, we will investigate the role of frequency and duration of the exposure, as well as particulate concentration of the wildland fire smoke. In Aim 2, we will focus on the relative contribution of different fuel sources characteristic of the WUI. Furthermore, as part of this ONES early-stage-investigator project, the PI and co-Is will generate an external advisory panel consisting of inhalation toxicology researchers, public health advocates, and fire protection experts. Dissemination of new knowledge gained from this proposal to the community will be a vital part of this endeavor.