通过双色球微型炎的Innexin hemichannel激活ecSOD单聚合物减少了ROS
Jiang-Hui Meng1,2,3, Yong-Biao Huang1,2,3, Jin Long1,2,3
1School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China.
iScience
|April 5, 2024
概括
来自Microplitis bicoloratus的细胞外超氧化解酶 (ecSOD) 通过特定的动机结合细胞膜,打开半通道以减少活性氧物种 (ROS). 这种机制对寄生虫的发展至关重要,可以为抗氧化剂治疗提供信息.
科学领域:
- 昆虫与微生物的相互作用
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 双色球微型炎分泌细胞外超氧化物脱酶 (ecSODs),以抵消由双色球微型炎手腕病毒诱导的活性氧物种 (ROS).
- ROS的升高可能会损害宿主血细胞功能和寄生虫发育.
研究的目的:
- 阐明 ecSODs 降低 ROS 的机制.
- 确定负责ecSOD细胞膜结合和半通道活动的特定域和动机.
- 研究ecSODs在宿主-寄生虫相互作用中的作用.
主要方法:
- 在体内用于ecSOD沉默的RNA干扰 (RNAi).
- 在体外测试以评估ecSOD-单聚合物结合和半通道活性.
- 分析特定的ecSOD域 (六基因,BIg类域) 和它们在膜结合和ROS减少中的作用.
主要成果:
- 细菌转移酶六 (hexapep) 基因和eCSODs的细菌免疫球蛋白样 (BIg-like) 域通过结合细胞膜和打开半通道来促进ROS的减少.
- 在体内,ecSOD沉默导致宿主血细胞中的ROS增加,阻碍了寄生虫的发展.
- 特定的基因 (ecSOD49/58中的hexapep,ecSOD67中的BIg-like) 对于膜结合,半通道开放和ROS减少至关重要,通过内素上调和半通道稳定来调节结合.
结论:
- ecSODs利用特定的动机来结合宿主细胞膜,暂时打开半通道,并减少ROS,这是寄生虫生存和发育的关键过程.
- 这些发现揭示了昆虫分泌的蛋白质对ROS调节的新机制.
- 这项研究为开发针对半导体通道功能的新型抗氧化剂疗法提供了洞察力.
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