的表面活性蛋白A1激活了巨细胞细胞分裂,并通过TLR4介导的NF-kB通路减弱了LPS诱导的炎症反应
Qian Zhou1, Haifeng Xiong1, Hanwen Wu1
1College of Veterinary Medicine, Anhui Agricultural University, 130 West Changjiang Road, Hefei, Anhui 230036, China.
Poultry science
|January 29, 2025
概括
表面活性蛋白A1 (cSP-A1) 增强了细菌的聚合和细胞化. 它还通过调节TLR4/NF-κB通路来减少免疫细胞的炎症.
科学领域:
- 免疫学 免疫学 免疫学
- 生物化学 生物化学
- 细胞生物学 细胞生物学
背景情况:
- 表面活性蛋白A1 (cSP-A1) 是一种主要存在于肺中的C型乳素.
- 其精确的功能和生物活性在很大程度上仍未被描述.
研究的目的:
- 为了表达,净化和描述重组cSP-A1 (RcSP-A1).
- 为了研究RcSP-A1对巨HD11细胞的影响.
- 评估RcSP-A1在调节脂聚糖 (LPS) 诱导的炎症反应中的作用.
主要方法:
- 重组cSP-A1 (RcSP-A1) 在HEK 293F细胞中产生,并通过Ni2+亲和力染色学进行净化.
- 进行了细菌聚合和巨细胞灭菌试验.
- HD11细胞被RcSP-A1治疗,并用LPS刺激,以评估炎症性细胞因子的产生和氧化的释放.
- 分析了涉及TLR4,MyD88,p65,IкB-α和NF-κB信号通路激活的机制.
主要成果:
- 净化RcSP-A1 (7.5μg/mL) 聚合细菌和显著增加的巨细胞化率 (p < 0.01).
- RcSP-A1 (12.550 μg/mL) 减弱了IL-1β,IL-6和TNF-α的LPS诱导的转录和蛋白质表达,并抑制了氧化的产生.
- RcSP-A1降低了TLR4,MyD88和p65,上调了IкB-α,并抑制了NF-κB通路的激活.
结论:
- RcSP-A1促进细菌聚合和细胞分裂,有助于天生的免疫防御.
- 在LPS刺激的巨中,RcSP-A1通过抑制TLR4/NF-κB信号通路来表现出抗炎性质.
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