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β2-上腺体信号传递促进了更高亲和度的B细胞和抗体
Noam Ben-Shalom1, Elad Sandbank2, Lilach Abramovitz1
1Department of Clinical Microbiology and Immunology, Faculty of Medicine, Tel Aviv University, 6997801 Israel.
Brain, behavior, and immunity
|June 27, 2023
概括
压力激活B细胞上的β-2上腺素受体 (β2AR),增强抗体亲和力. 这种机制涉及PI3K/AKT信号传递,从而改善B细胞受体激活和更高质量的抗体.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- 压力会影响免疫反应,包括B细胞功能.
- 已知B细胞上的β2上腺素受体 (β2AR) 激活会增加IgG分泌.
- β2AR激活对抗体亲和力的确切影响以及潜在的分子机制尚未完全理解.
研究的目的:
- 研究压力诱导的β2AR激活对抗体亲和力和B细胞反应的影响.
- 阐明参与β2AR介导B细胞功能的调制的分子途径.
- 为了确定β2AR激活是否提高了抗体质量.
主要方法:
- 免疫的小鼠模型 (卵泡蛋白和SARS-CoV-2 RBD) 受到压力.
- 药理 β2AR 阻断和使用 β2AR 淘汰小鼠的实验.
- 单个B细胞分类和单克隆抗体 (mAbs) 的表征.
- 活体B细胞培养与β2AR激活.
- 用于途径分析的mRNA测序.
主要成果:
- 压力显著增加了小鼠的血清和表面IgG与免疫原体的结合.
- 在体外和体内β2AR激活导致抗RBDmAb亲和力增加100倍.
- 这些效应被β2AR阻断或β2AR淘汰小鼠消除.
- β2AR激活降低了表面IgG水平和B细胞克隆扩张.
- 观察到PI3K通路的升级,AKT酸化和B细胞运动的增强.
结论:
- 在B细胞中,压力介导的β2AR激活增强了抗体亲和力.
- 该机制涉及PI3K/AKT信号传递和B细胞受体激活.
- β2AR激活促进产生更高亲和力的抗体,这表明它在适应性免疫调节中的作用.
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