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艾格尔热性调节了奥斯特尼亚香虫幼虫的免疫力

Honglun Bi¹, Wenlong Guo¹, Shiqi Lu¹

¹Department of Entomology, College of Plant Protection, Yangzhou University, Yangzhou, Jiangsu, China.

|July 2, 2025

概括

艾格,在Ostrinia furnacalis中的瘤亡因子同类物,对昆虫免疫至关重要. 它的调节会影响天生的免疫路径,抗菌素的产生,以及细胞防御机制对抗细菌感染.

科学领域:

昆虫免疫学昆虫免疫学
分子生物学分子生物学
天生的免疫信号通路的信号通路.

背景情况:

瘤亡因子 (TNF) 受体超级家族在炎症反应中发挥着关键作用.
艾格,Drosophila中的TNF同类物,参与天生的免疫力.
艾格尔在白斑的免疫反应中的功能和调节在很大程度上是未知的.

研究的目的:

来自Ostrinia furnacalis (OfEiger) 的艾格尔的克隆和特征.
调查OfEiger在O.furnacalis幼虫的免疫反应中的作用.
为了阐明Ofeiger免疫路径调节的基础分子机制.

主要方法:

来自O. furnacalis. 的OfEiger的克隆.
分析不同年龄和不同组织的幼虫的OfEiger表达模式.
在细菌挑战 (Pseudomonas aeruginosa,Micrococcus luteus) 之后,OfEiger表达的升级.
使用双链艾格尔 (dsEiger) 评估基因功能的RNA干扰 (RNAi).
免疫通路基因表达的定量分析 (IMD,Toll,NO,MAPK).
对抗微生物 (AMP) 基因表达的测量.
对抗大肠杆菌的血细胞细胞活性的评估.
评估RNAi后的细菌感染后幼虫存活率.
对氧化酶 (PO) 活性进行分析.

主要成果:

OfEiger具有保存的TNF家族结构域,其表达随着幼虫年龄的增加而增加,主要在血细胞中.
细菌感染显著提升了Ofeiger表达的调节.
OfEiger RNAi降低了关键的免疫通路 (IMD,Toll,NO,MAPK),降低了AMP的表达,损害了血细胞细胞分裂,并降低了幼虫的存活率.
OfEiger RNAi还抑制PO活动和特定的免疫基因表达 (OfNOS1,AMPs),同时在细菌挑战后升调其他 (OfMyD88,OfJNK).

结论:

在O. furnacalis.中,OfEiger是昆虫天生的免疫的关键调节者.
它协同调节多个免疫信号通路,包括IMD,Toll,NO和MAPK.
OfEiger影响细胞免疫力,抗菌的产生和氧化酶的活性,强调其在宿主防御中的重要作用.

关键词:

艾格尔山 (Eiger) 是一个高山.这种虫是Ostrinia furnacalis.细胞因子细胞因子免疫调节免疫调节天生的免疫力天生的免疫力.

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