疹病毒感染导致溶酶体的功能障碍,因为它降低了LAMP1和LAMP2的表达
Xingmiao Yang1, Zheng Wang1, Shengda Xie1
1MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
日本脑炎病毒 (JEV) 感染通过降低LAMP1/2水平,破坏细胞代谢,损害了溶酶体功能. JEV NS4B蛋白触发ER压力介导的自,这是这个过程中的关键机制.
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:
- 日本脑炎病毒 (JEV) 是亚洲病毒性脑炎的主要原因.
- 溶解体对于细胞代谢至关重要,调节生物发生和自.
- 溶解体功能障碍与各种疾病有关.
研究的目的:
- 为了研究JEV感染对 lysosomal 功能的影响.
- 阐明JEV非结构蛋白4B (NS4B) 在调节 lysosomal 途径中的作用.
- 了解JEV诱导的细胞破坏的机制.
主要方法:
- 在被JEV感染的细胞中分析溶酶相关膜蛋白 (LAMP1和LAMP2) 表达.
- 对自-溶酶体通路的研究.
- 检查JEV NS4B与GRP78的相互作用和内质网膜 (ER) 的压力.
- 绘制NS4B的功能域,负责自诱导.
主要成果:
- 疹病毒感染降低了LAMP1和LAMP2的调节,减少了酸性溶解体,并破坏了代谢.
- JEV NS4B被确定为通过自-溶酶体通路减少LAMP1/2的关键因素.
- NS4B诱导了ER压力和自,其中131-204 aa区域是必不可少的.
- 观察到猪SLA-DR的异常聚合,影响了抗原呈现.
结论:
- 热血球病毒感染会破坏 lysosomal 功能和细胞代谢.
- JEV NS4B在诱导自和减少 lysosomal 蛋白质方面发挥着至关重要的作用.
- 这项研究揭示了一种新的JEV诱导途径,涉及ER压力和自,损害了溶酶体功能.
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