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Identification of β tubulin IVb as a pattern recognition receptor with opsonic activity.
Comparative Biochemistry and Physiology C: Toxicology & Pharmacology ( IF 3.9 ) Pub Date : 2020-05-06 , DOI: 10.1016/j.cbpc.2020.108781
Huimin Duan 1 , Shuaiqi Yang 1 , Shousheng Ni 1 , Zengyu Ma 1 , Jianrui Yuan 1 , Shicui Zhang 2
Affiliation  

Previous studies have shown that tubulins play important role in immune responses of both plants and animals, but no experiments have been performed to study the mode of action of tubulins in immune defense. In addition, there is little convincing experimental evidence of functional commitment for specific tubulin isotypes in animals. In the present, we showed that expression of β-tubulin IVb gene was affected by both LPS and LTA, hinting its involvement in anti-infectious response. We also showed that recombinant zebrafish β-tubulin IVb not only interacted with LPS and LTA as well as Gram-negative and -positive bacteria but also agglutinated both Gram-negative and -positive bacteria in a Ca2+-dependent fashion. Interestingly, recombinant β-tubulin IVb could enhance the phagocytosis of bacteria by macrophages. Moreover, we demonstrated that β-tubulin IVb was present extracellularly in the serum of zebrafish and mouse. Collectively, these suggest that β-tubulin IVb may be physiologically involved in the systematic immunity of host via acting as a pattern recognition receptor and an opsonin. This also provides a new angle to understand the roles of β-tubulin IVb.

中文翻译:

鉴定β微管蛋白IVb为具有调理活性的模式识别受体。

先前的研究表明,微管蛋白在动植物的免疫反应中均起着重要作用,但尚未进行实验来研究微管蛋白在免疫防御中的作用方式。此外,几乎没有令人信服的实验证据表明动物对特定微管蛋白同种型具有功能承诺。目前,我们表明LPS和LTA都影响β-微管蛋白IVb基因的表达,表明其参与抗感染反应。我们还显示,重组斑马鱼β-微管蛋白IVb不仅与LPS和LTA以及革兰氏阴性和阳性细菌相互作用,而且以Ca2 +依赖的方式凝集革兰氏阴性和阳性细菌。有趣的是,重组β-微管蛋白IVb可以增强巨噬细胞对细菌的吞噬作用。此外,我们证明了β-微管蛋白IVb存在于斑马鱼和小鼠的血清中。总的来说,这些提示β-微管蛋白IVb可能通过充当模式识别受体和调理素而在生理上参与宿主的系统免疫。这也为理解β-微管蛋白IVb的作用提供了新的视角。
更新日期:2020-05-06
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