细胞外矩阵的刚性调节了子囊鼻巨细胞-B细胞免疫突触的物理性质
Maro Iliopoulou1, Anna T Bajur2, Hannah C W McArthur1
1Department of Physics, King's College London, London, United Kingdom.
Biophysical journal
|October 16, 2023
概括
亚囊性鼻巨细胞 (SSM) 使用其活性细胞骨架来控制抗原呈现. 机械环境影响SSM和B细胞,影响免疫突触持续时间和免疫反应期间的抗原呈现.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 囊下鼻巨细胞 (SSM) 对于免疫防御至关重要,控制抗原的运输和呈现给B细胞.
- 它们在适应性免疫中的复杂作用受到体外研究中的挑战的阻碍.
- 了解SSM细胞生物学对于破译免疫反应至关重要.
研究的目的:
- 为了研究actin细胞骨在SSM抗原呈现中的作用.
- 确定SSM是否具有机械敏感性以及这如何影响抗原呈现.
- 探索细胞外矩阵刚度对SSM-B细胞相互作用的影响.
主要方法:
- 多色光显微镜被用来识别和研究淋巴结衍生在培养中的SSMs.
- 研究了由actin细胞骨架调节免疫复合体 (IC) 运动的调节.
- 评估了SSM和B细胞对不同细胞外矩阵刚性的反应.
主要成果:
- 亚丁细胞骨调节细胞表面免疫复合体 (IC) 的空间组织和流动性.
- SSM是机械敏感的,在对矩阵刚性的反应中改变了actin细胞骨架,形态和IC移动性.
- 细胞外矩阵刚性调节SSM-B细胞免疫突触中的actin重塑,影响突触持续时间,但不影响IC内化或NF-κB激活.
结论:
- 乙细胞骨架是SSM对抗原呈现的关键调节者.
- 对机械微环境的SSM机械敏感性和反应影响抗原呈现.
- 物理微环境通过SSM改变抗原呈现来调节B细胞反应.
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