肺部葡萄糖的酶调节增加了对Streptococcus pneumoniae的敏感性
Cengiz Goekeri1,2, Kerstin A K Linke1, Karen Hoffmann1
1Department of Infectious Diseases, Respiratory Medicine and Critical Care.
概括
完好无损的肺部糖氨基甘氨酸,如氨酸和硫酸肝,限制了在Streptococcus pneumoniae感染期间的肺损伤. 它们的降解会恶化肺炎,增加炎症和屏障功能障碍.
科学领域:
- 肺免疫学 肺免疫学
- 微生物学 微生物学
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- 肺上皮质葡萄糖含有糖氨基甘油 (GAG),如氨酸和硫酸肝.
- 这些GAG在细菌性肺部感染,特别是肺炎球菌性肺炎中的作用尚不清楚.
研究的目的:
- 为了研究肺部和肝硫酸盐在宿主防御中对Streptococcus pneumoniae感染的作用.
- 确定这些GAG的酶性向如何影响疾病病理,炎症和肺壁垒完整性.
主要方法:
- 用Streptococcus pneumoniae对小鼠进行鼻腔内接种,有或没有向氨酸和肝硫酸盐的酶.
- 评估疾病严重程度,肺炎,肺屏障功能和细菌负载.
- 验证使用人体膜片上芯片模型和横体电阻测量.
主要成果:
- 硫酸甲和硫酸甲的酶降解加剧了肺炎,增加了疾病得分和中性粒细胞的招募.
- 向氨酸加剧了全身性疾病,而向硫酸肝素增加了细菌负担,肺损伤和炎症.
- 在小鼠和人类肺模型中,肝酶治疗破坏了肺屏障的完整性,增加了对肺炎球菌引起的损伤的易感性.
结论:
- 完整的氨酸和肝素硫酸盐对于限制Streptococcus pneumoniae引起的肺损伤,炎症和保持上皮屏障完整性至关重要.
- 这些GAG的降解损害了肺部的防御机制,并加剧了肺炎球菌性肺炎.
- 这些发现突出了在治疗细菌性肺部感染时保存GAG的治疗潜力.
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