IKKβ调节黄粉,Tenebrio molitor的抗微生物天生的免疫反应
Hye Jin Ko1, Ho Am Jang2, Ki Beom Park1
1Division of Plant Biotechnology, Institute of Environmentally-Friendly Agriculture (IEFA), College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 61186, Republic of Korea.
Developmental and comparative immunology
|June 18, 2023
概括
这项研究确定了Tenebrio molitor IKKβ (TmIKKβ) 对于昆虫免疫力至关重要. 沉默TmIKKβ会损害宿主中的功能.
科学领域:
- 昆虫免疫学 昆虫免疫学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 收费和IMD通路是昆虫先天免疫的关键调节者,控制抗微生物 (AMP) 的产生.
- IKK激酶复合体 (IKKα,IKKβ和IKKγ/NEMO) 是NF-κB信号传递的核心,它协调免疫反应.
- 了解昆虫的免疫机制对于控制农业害虫和疾病载体至关重要.
研究的目的:
- 识别和描述Tenebrio molitor IKKβ (TmIKKβ) 的同类物,并阐明其在抗菌天生的免疫力中的作用.
- 研究微生物挑战后TmIKKβ的表达模式和调节.
- 确定TmIKKβ对宿主敏感性和免疫相关基因表达的影响.
主要方法:
- 查RNA-seq数据以识别TmIKKβ同类在Tenebrio molitor中的同类.
- 基因表征包括ORF分析,域识别和家族遗传学分析.
- 在不同发育阶段和组织以及感染后对TmIKKβ的定量表达分析 (qRT-PCR).
- RNA干扰 (RNAi) 沉默TmIKKβ表达并评估其对宿主生存和AMP基因表达的影响.
主要成果:
- 确定了一种TmIKKβ同源物 (TmIrd5),它编码了一种703氨基酸蛋白质,具有氨酸/氨酸激酶域,与TcIKKβ系遗传相关.
- 在幼和成年阶段,tmIKKβ表达高,在幼整体和成年脂肪体/血细胞中显著存在.
- 在大肠杆菌挑战后,tmIKKβmRNA水平增加,而RNAi介导的tmIKKβ沉默显著增加了对大肠杆菌,黄金色杆菌和白杆菌的敏感性,同时降低了关键的AMP基因和NF-κB因子.
结论:
- 在Tenebrio molitor的抗菌天生的免疫反应中,TmIKKβ起着至关重要的作用.
- 该基因对于调节多个抗微生物基因和NF-κB通路组件的表达至关重要.
- 在昆虫对抗细菌和真菌病原体的免疫信号级联中,tmIKKβ起着关键的调解作用.
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