Spodoptera frugiperda Sf9 cells as a model system to investigate the role of detoxification gene expression in response to xenobiotics

IF 2.2 Q1 ENTOMOLOGY
Dries Amezian , Sonja Mehlhorn , Calypso Vacher-Chicane , Ralf Nauen , Gaëlle Le Goff
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引用次数: 3

Abstract

Spodoptera frugiperda (fall armyworm) is a highly destructive invasive pest that feeds on numerous crops including maize and rice. It has developed sophisticated mechanisms to detoxify xenobiotics such as secondary plant metabolites as well as manmade insecticides. The aim of the study was to explore the detoxification response to plant secondary metabolites and insecticides employing a S. frugiperda Sf9 cell model exposed to indole 3-carbinol (I3C) and methoprene. The cell Inhibitory Concentration 50 (IC50) for these molecules was determined and IC10, IC20 and IC30 doses were used to monitor the induction profiles of detoxification genes. Cytochrome P450 monooxygenases (P450s) of the CYP9A subfamily were the most inducible genes of the seven examined. Our results also showed the induction of the transcription factor Cap‘n'collar isoform C (CncC). Transient transformation of Sf9 cells overexpressing CncC and its partner muscle aponeurosis fibromatosis (Maf) induces overexpression of CYP4M14, CYP4M15, CYP321A9 and GSTE1 while CYP9As were not induced. Next, we determined the capacity of recombinantly expressed CYP9A30, CYP9A31 and CYP9A32 to interact with methoprene and I3C. Fluorescence-based biochemical assays revealed an interaction of methoprene with functionally expressed CYP9A30, CYP9A31 and CYP9A32 whereas almost no interaction was detected for I3C, suggesting the ability of CYP9As to metabolize methoprene. Our results showed that Sf9 cells could be a useful model to decipher detoxification pathways of S. frugiperda.

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以夜蛾Sf9细胞为模型系统,研究其解毒基因表达在外源药物应答中的作用
夜蛾(Spodoptera frugiperda)是一种极具破坏性的入侵害虫,以包括玉米和水稻在内的许多作物为食。它已经开发出复杂的机制来解毒外来生物,如次生植物代谢物以及人造杀虫剂。本研究采用吲哚- 3-甲醇(I3C)和甲氧丁二烯暴露的S. frugiperda Sf9细胞模型,探讨其对植物次生代谢物和杀虫剂的解毒反应。测定这些分子的细胞抑制浓度50 (IC50),并使用IC10、IC20和IC30剂量监测解毒基因的诱导谱。CYP9A亚家族的细胞色素P450单加氧酶(P450)是7个检测基因中最易诱导的基因。我们的结果还显示了转录因子Cap 'n 'collar isoform C (CncC)的诱导作用。过表达CncC及其伴侣肌腱膜纤维瘤病(Maf)的Sf9细胞的瞬时转化诱导CYP4M14、CYP4M15、CYP321A9和GSTE1过表达,而CYP9As未被诱导。接下来,我们确定了重组表达的CYP9A30、CYP9A31和CYP9A32与甲基戊二烯和I3C相互作用的能力。基于荧光的生化分析显示,甲基戊二烯与功能表达的CYP9A30、CYP9A31和CYP9A32相互作用,而I3C几乎没有检测到相互作用,这表明CYP9As能够代谢甲基戊二烯。结果表明Sf9细胞可以作为解毒途径的有效模型。
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来源期刊
Current Research in Insect Science
Current Research in Insect Science Agricultural and Biological Sciences-Animal Science and Zoology
CiteScore
3.20
自引率
0.00%
发文量
22
审稿时长
36 days
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