простациклин合成酶的缺乏加剧了系统性炎症反应在脂肪多糖诱导的败血症休克在小鼠
Tsubasa Ochiai1, Toshiya Honsawa1, Keishi Yamaguchi1
1Division of Health Chemistry, Department of Healthcare and Regulatory Sciences, School of Pharmacy, Showa University, 1-5-8 Hatanodai, Shinagawa-Ku, Tokyo, 142-8555, Japan.
概括
由PGIS产生的前环素 (PGI2) 能防止感染性休克症状. 准PGI2-IP信号通路可能为严重的全身炎症提供新的治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 药理学 药理学是指药理学的学科.
- 生物化学 生物化学
背景情况:
- 败血症是一种危及生命的全身性炎症状况.
- 由PGI合成酶 (PGIS) 合成的前环素 (PGI2) 调节炎症和心血管功能.
- 在性休克中PGIS/PGI2通路的具体作用尚不清楚.
研究的目的:
- 调查PGIS和PGI2在宿主对败血症反应中的作用.
- 为了评估向PGI2受体 (IP) 的治疗潜力,我们用小鼠模型进行了败血性休克.
主要方法:
- 在野生型 (WT) 和PGIS淘汰赛 (KO) 小鼠中使用脂多糖 (LPS) 诱导系统性炎症.
- 小鼠接受了选择性IP受体激动剂selexipag的治疗.
- 监测了临床症状,基因表达 (Tnf,Il6) 和生存率.
主要成果:
- 与WT小鼠相比,PGIS KO小鼠表现出恶化的败血症症状,包括低温和腹.
- 在PGIS KO小鼠中,LPS挑战导致Tnf和Il6基因表达的增加.
- 虽然所有PGIS KO小鼠在72小时内死亡,但selexipag治疗显著提高了它们的生存率.
结论:
- 来自PGIS的PGI2在减轻LPS诱导的败血症休克方面发挥着至关重要的保护作用.
- PGI2-IP信号轴代表了一个有前途的治疗点,用于管理性休克时的全身炎症.
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