氨酸IXB保护免疫细胞免受病毒感染
Leticia Kogachi1, Taís Matozo1, Yuli Thamires Magalhães2
1Laboratory of Cell Biology of the Immune System, Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil.
The Journal of general virology
|April 1, 2025
概括
肌酸IXB (Myo9b) 蛋白阻碍病毒进入免疫细胞并感染免疫细胞. 沉默Myo9b通过促进病毒内部化和融合,显著增加了HIV-1感染.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 动因相关蛋白质在病毒感染中起作用.
- 菌素的功能,在病毒病原体中依赖于actin的电机,尚不清楚.
- 在免疫细胞中表达的Myosin IXB (Myo9b) 通过其RhoGTPase激活蛋白域调节了actin动态.
研究的目的:
- 为了研究Myosin IXB (Myo9b) 在病毒感染和病变发生中的作用.
- 确定Myo9b是否影响HIV-1感染免疫细胞.
主要方法:
- 在U937和Jurkat免疫细胞中,Myo9b被静止.
- 细胞被感染了带状口腔炎病毒糖蛋白 (VSV-G) 伪型的HIV-1.
- 分析了病毒感染的变化,actin聚合,cofilin酸化和RhoGTPase活性.
主要成果:
- 与对照细胞相比,myo9b沉默细胞显示HIV-1感染的增加是10倍.
- 在Myo9b沉默细胞中观察到高酸化的cofilin和减少的聚合的actin.
- 抑制RhoA/B/C和Rac1减少了病毒感染,而Myo9b的淘汰增加了病毒内部化和融合.
结论:
- 氨酸IXB (Myo9b) 作为病毒进入和感染免疫细胞的抑制剂.
- 通过调节RhoGTPase活性,Myo9b可能会抑制感染,从而控制actin动态.
- 这些发现凸显了Myo9b作为抗病毒策略的潜在目标.
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