微生物组分内毒素与大气颗粒的协同炎症效应

来源 :中国环境科学学会室内环境与健康分会第八届学术年会( IEHB 2017) | 被引量 : 0次 | 上传用户:lianglianghepan
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  越来越多的研究表明空气污染和呼吸系统疾病、心脑血管疾病等现代疾病相关,但具体致病机制仍不明确。一方面,人体持续暴露于空气污染物,其中微生物气溶胶是重要组分之一。另一方面,人体内也有大量微生物,数量是人体细胞的十倍左右,作为体内的一个特殊“器官”,对健康的重要性日益凸显。源于微生物的组分,如内毒素、葡聚糖等,对维持机体免疫系统平衡有重要作用。本研究针对微生物源的内毒素和大气颗粒物的潜在协同健康效应开展了研究,有助于揭示大气污染健康效应机制。研究结果表明,大气颗粒物中的内毒素组分,和颗粒物的促炎症效应有显著关系。当考虑到呼吸道内的微生物时,实验室的模拟实验表明,颗粒物可以显著增强由内毒素导致的促炎症效应。基因表达分析结果表明,颗粒物的增强效应和其氧化还原活性有密切关系。本研究进一步表明了颗粒物氧化性对机体健康的危害性。
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