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微RNA-375通过向斑马鱼中的Cathepsin B来调节中性粒细胞化学反应

Decheng Wang¹, Tianqi Wang¹, Daniel Kim¹

¹Department of Biological Sciences, Purdue University, West Lafayette, IN, 47907, USA.

Fish & shellfish immunology

|September 29, 2024

概括

微RNA-375 (miR-375) 通过向Cathepsin B (Ctsba) 来调节中性粒细胞活动,影响细菌感染和组织损伤期间的免疫细胞迁移和存活.

科学领域:

免疫学免疫学免疫学
分子生物学分子生物学
细胞生物学细胞生物学

背景情况:

中性粒细胞是对抗感染的重要免疫细胞.
必须精确控制它们的迁移和激活,以防止组织损伤.
微RNAs (miRNAs) 是细胞过程的关键调节者,包括免疫细胞功能.

研究的目的:

研究miR-375在调节中性粒细胞活动中的作用.
为了确定参与中性粒细胞功能的miR-375的下游点.
阐明miR-375影响中性粒细胞迁移和对感染的反应的机制.

主要方法:

在斑马鱼中对中性粒细胞特异的miRNA过度表达查.
基因表达分析以确定miR-375的目标.
在斑马鱼和人类细胞中检测中性粒细胞运动和化学反应的功能性试验.
药理抑制和基因淘汰策略.
在细菌感染模型中评估生存率.

主要成果:

过度表达miR-375减少了中性粒细胞的运动和迁移.
甲素B (Ctsba) 被确定为miR-375的直接标,对中性粒细胞化学反应至关重要.
抑制或淘汰Ctsba损害了中性粒细胞迁移,减少了细菌感染期间的存活率.
抑制整合素功能的RGDS治疗在miR-375过度表达和Ctsba淘汰模式中挽救了迁移缺陷.

结论:

miR-375通过对Ctsba.的调节来调节中性粒细胞活动,包括迁移和化学反应.
在组织损伤和细菌感染期间,Ctsba在中性粒细胞功能中发挥着至关重要的作用.
整蛋白信号传递是受中性粒细胞中 miR-375 和 Ctsba 影响的关键下游通路.

关键词:

感染感染感染中性粒细胞的迁移.斑马鱼是一种斑马鱼.这是一个微型RNA.

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MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...