卡斯巴酶介导的互白金-18成熟促进了与膜相关的非传统分泌和信号转导在远鱼中
Liming Yuan1,2, Hang Xu2,3,4, Shuai Jiang2,3,4
1College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109 China.
Marine life science & technology
|March 5, 2026
概括
这项研究揭示了Interleukin-18 (IL-18) 如何成熟,并在远鱼中分泌,增强对细菌感染的免疫反应. 这种独特的机制为古代脊椎动物的免疫调节提供了洞察力.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 进化生物学 进化生物学
背景情况:
- 介素-18 (IL-18) 是一种关键的促炎细胞因子,参与免疫调节.
- 它的非活性前体形式需要成熟和分泌功能.
- 在早期脊椎动物中IL-18的调节机制尚不清楚.
研究的目的:
- 为了研究IL-18的成熟,分泌和信号传导在远鱼,半平滑舌 (Cynoglossus semilaevis) 中.
- 为了阐明在亲IL-18加工中涉及的特定caspases.
- 了解IL-18在远程生物中的抗菌免疫力中的作用.
主要方法:
- 通过各种caspase (caspase-1, -3/7, -6) 进行亲IL-18裂变的分析.
- 成熟的IL-18特性 (电荷,定位) 的表征.
- 通过微和受体结合 (IL-18Rα和IL-18Rβ) 检测IL-18分泌的研究.
- 评估IL-18在细菌挑战后免疫反应中的作用.
主要成果:
- 亲IL-18被酶-1,-3/7和-6分裂,产生了三个成熟的IL-18形式.
- 成熟的IL-18具有正电荷,与膜相关,并通过微小分泌.
- 分泌的IL-18与IL-18Rα和IL-18Rβ结合,形成一个活性信号复合体.
- 细菌挑战可提高IL-18的调节,促进促炎性细胞因子的表达,增强抗菌免疫力.
- 激活IL-18可以降低感染引起的死亡率.
结论:
- 在远鱼中存在一种独特的IL-18成熟和非传统分泌机制.
- IL-18信号通路在远程天生的免疫和宿主防御中起着至关重要的作用.
- 这项研究为脊椎动物中IL-18介导的免疫调节的演变和功能提供了新的见解.
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