介质素17家族成员及其受体在两动物中的功能性表征
Haifeng Li1, Liping Zhang2, Zhuocheng Yao3
1Key Laboratory of Evolution & Marine Biodiversity (Ministry of Education), Institute of Evolution & Marine Biodiversity, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Qingdao 266237, China.
概括
这项研究确定了无脊椎动物衍生的 (i型) 和脊椎动物特有的 (v型) 两虫中介素17 (IL17) 配体和受体,揭示了它们在免疫防御和炎症调节中的古老作用.
科学领域:
- 免疫学 免疫学 免疫学
- 进化生物学 进化生物学
- 基因组学就是基因组学.
背景情况:
- 介素17 (IL17) 细胞因子家族对免疫防御至关重要,具有明显的无脊椎动物衍生 (i型) 和脊椎动物特异性 (v型) 血统.
- 基底状羊 (basal chordate amphioxus) 拥有两种IL17亚型,但它们的受体和功能以前是未知的.
研究的目的:
- 为了表征AmphioxusBranchiostoma japonicum中的IL17连接体-受体网络.
- 阐明i型和v型IL17s在免疫调节和平衡中发挥的功能作用.
主要方法:
- 在amphioxus中全基因组识别IL17配体和受体.
- 在体外功能测试以评估联体受体相互作用和信号传递.
- 分析与炎症和抗微生物防御有关的基因表达模式.
主要成果:
- 确定了四个i型 (BjIL17-i1至BjIL17-i4) 和四个v型 (BjIL17-v1至BjIL17-v4) 的IL17连接体,以及两个受体 (BjIL17R1,BjIL17R2).
- i型干主要激活了BjIL17R1/R2异构复合体,而v型干显示了BjIL17R1或BjIL17R2的异构体特异激活.
- 所有BjIL17异型都调节了炎症和抗菌反应;BjIL17-i2充当了促炎媒介,而BjIL17-v1诱导了ATP合成和DNA修复基因.
结论:
- 两体IL17连接体-受体网络代表了免疫和恒温的古老调节轴,早于脊椎动物的进化.
- i型和v型IL17s的不同功能专业化突出了它们在天生的免疫力中的保留和不同的作用.
- BjIL17-i2和BjIL17-v1显示出潜在的生物标志物,用于基础带动物的炎症状态和细胞修复机制.
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