在一项随机交叉暴露研究中,吸入内毒素诱导全身中性粒细胞反应而不会影响心血管措施
Stephen A Schworer1,2,3, Alan L Hinderliter4, Melissa C Caughey5
1Division of Allergy and Immunology, Department of Pediatrics, UNC School of Medicine, University of NC at Chapel Hill, NC, USA.
Inhalation toxicology
|February 18, 2024
概括
吸入脂聚糖 (LPS) 在健康成年人中引起全身炎症,但没有急性影响心血管措施. 需要对颗粒物成分和心血管健康进行进一步的研究.
科学领域:
- 环境健康 环境健康
- 心血管生理学心血管生理学
- 免疫学 免疫学 免疫学
背景情况:
- 暴露于颗粒物 (PM) 与心血管疾病有关.
- 脂多糖 (LPS) 是PM的组成部分,可能会导致心血管影响.
- 由于LPS引起的炎症对心血管功能的急性影响尚不清楚.
研究的目的:
- 调查LPS吸入是否会导致健康成年人心血管生理测量的急性变化.
- 为了评估对LPS暴露的全身炎症反应.
主要方法:
- 这是一项双盲,安慰剂控制的交叉研究,涉及15名成年志愿者.
- 吸入暴露于LPS (20,000欧盟CCRE) 或安慰剂.
- 在暴露前和之后测量血压,左心室功能 (LVEF,LVGLS) 和内皮功能 (FMD,VTIhyp).
- 对周围血液和唾液中性粒细胞的分析.
主要成果:
- 吸入LPS显著增加了周围血液和唾液中性粒细胞,表明系统性炎症.
- 在LPS暴露后的血压,LVGLS,LVEF,口腔炎或VTIhyp中没有观察到显著的变化.
- 炎症反应并没有转化为急性心血管生理变化.
结论:
- 由LPS吸入引起的系统性炎症不会在健康成年人中急性改变心血管生理学.
- 颗粒物中的其他成分可能在炎症引起的心血管功能障碍中发挥作用.
- 需要进行更大规模的研究来探索PM对心血管健康的长期和成分特异性影响.
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