聚I:C疫苗接种通过I型和II型干扰素信号传递驱动短暂的CXCL9表达在淋巴结中的B细胞毛囊附近
Alexander G Ball1, Katerina Morgaenko2, Parastoo Anbaei3
1Department of Microbiology Cancer Biology and Immunology, University of Virginia, Charlottesville, VA 22903, USA; Carter Immunology Center and UVA Cancer Center, University of Virginia, Charlottesville, VA 22903, USA.
Th1极化疫苗,如Poly I:C,独特地增加了淋巴结中的化学因子CXCL9. 这种由I型干扰素和IFNγ驱动的反应对于疫苗诱导的免疫细胞相互作用至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 疫苗学 疫苗学 疫苗学
- 分子生物学分子生物学
背景情况:
- 亚单元疫苗促进淋巴结 (LN) 内的免疫细胞相互作用.
- 不同辅助剂对LN化学因子的影响仍然不太清楚.
- 不同的辅助剂可能会引起独特的化学因子配置,从而影响疫苗的疗效.
研究的目的:
- 调查Th1极化疫苗是否会在LN中诱导一种独特的化学签名.
- 为了确定参与辅助剂介导免疫反应的特定化学因子和途径.
- 了解化基因在疫苗诱导的抗体两极化中的作用.
主要方法:
- 在体内小鼠模型和活体外体内LN切片实验.
- 用Poly I:C,或/Poly I:C组合进行疫苗接种.
- 测量化学激素 (CXCL9) 和细胞激素 (I型IFN,IFNγ) 的表达.
- 对CXCL9受体和抗体同型分析 (IgG2c) 的遗传衰竭.
主要成果:
- 聚I:C疫苗接种在LN的毛囊间区域独特上调了CXCL9.
- 第一种类型的IFN和IFNγ信号对于Poly I:C诱导的CXCL9表达是必不可少的.
- CXCL9上调与IgG2c抗体两极化相关,尽管不依赖于CXCL9受体.
- 诱导IFNγ的辅助剂也促进了从LN切片中CXCL9的分泌.
结论:
- 一个独特的CXCL9化学基因特征与Th1极化辅助剂有关.
- 涉及I型IFN和IFNγ的途径驱动LN中的CXCL9表达.
- 准CXCL9通路为未来的疫苗开发提供了机会.
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