用EpOME/DiHOME解决昆虫免疫系统,并通过其类似物对其失调,从而导致病原体过敏
Tafim Hossain Hrithrik1, Dong-Hee Lee2, Nalin Singh3,4
1Department of Plant Medicals, Andong National University, Andong 36729, Korea.
bioRxiv : the preprint server for biology
|July 18, 2023
概括
环氧十甲胺酸 (EpOMEs) 抑制了昆虫的免疫力,而它们的代谢物 (DiHOMEs) 恢复了免疫力. 这种平衡调节了昆虫的免疫反应和对诸如Bacillus thuringiensis之类的病原体的敏感性.
科学领域:
- 昆虫免疫学和脂质介质信号传递.
- 在无脊椎动物中氧利平的代谢和功能.
- 在Lepidoptera中免疫调节的分子机制.
背景情况:
- 环氧十甲胺酸 (Epoxyoctadecamonoic acid,简称EPOME) 是一种有着已知作用于哺乳动物的氨酸衍生物.
- 在昆虫中,EpOMEs作为免疫抑制剂起作用,但它们与亲免疫介质的联系以及它们的代谢物 (DiHOMEs) 的作用仍然不清楚.
- 了解这些C18氧利平对于昆虫害虫管理和疾病耐药性至关重要.
研究的目的:
- 为了研究 EpOMEs 和 DiHOMEs 在虫虫害虫 Spodoptera exigua 的生理作用.
- 阐明 EpOMEs,像 PGE2 这样的亲免疫媒介和昆虫免疫反应之间的功能联系.
- 为了确定DiHOMEs在昆虫免疫力中的重要性.
主要方法:
- 在免疫挑战后对基因表达 (脂酶A2,EpOME合成酶,可溶性环氧化酶) 的分析.
- 量化EpOMEs和DiHOMEs,并评估它们对细胞和幽默免疫的影响.
- 使用合成类似物和可溶性环氧化酶 (sEH) 的特定抑制剂进行验证.
- 评估昆虫易受 Bacillus thuringiensis 在改变的氧利平水平下.
主要成果:
- 免疫挑战对PGE2,EpOME合成酶和sEH的基因进行上调,导致EpOME和DiHOME的产生增加.
- EpOMEs抑制了细胞和幽默免疫反应,其中12,13-EpOME比9,10-EpOME更强大.
- 通过上调抗微生物表达的调节,DiHOMEs抵消了EpOME诱导的抑制.
- sEH抑制增强了免疫抑制,增加了对Bacillus thuringiensis的敏感性.
结论:
- C18氧利平,特别是EpOMEs和DiHOMEs,在调节昆虫免疫反应方面发挥着至关重要的作用.
- EpOMEs充当免疫抑制剂,而DiHOMEs促进免疫防御,建立了昆虫免疫的解决机制.
- 通过EpOME类似物或sEH抑制剂来调节这种系统的失调,会损害昆虫的免疫力,并增加病原体的易感性.
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