The novel fish miRNA pol-miR-novel_171 and its target gene FAM49B play a critical role in apoptosis and bacterial infection

doi:10.1016/j.dci.2020.103616

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	The novel fish miRNA pol-miR-novel_171 and its target gene FAM49B play a critical role in apoptosis and bacterial infection
	Li, Wen-rui 1,2,3; Guan, Xiao-lu 1,2; Jiang, Shuai 1,2; Sun, Li 1,2
刊名	DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
	2020-05-01
卷号	106 页码:10
关键词	Paralichthys olivaceus Edwardsiella tarda microRNA Family with sequence similarity 49 Apoptosis Infection Immune defense
ISSN号	0145-305X
DOI	10.1016/j.dci.2020.103616
通讯作者	Sun, Li(lsun@qdio.ac.cn)
英文摘要	MicroRNAs (miRNAs) are a type of small, non-coding RNAs that participate in many cellular and biological processes by regulating mRNA stability. In a previous study, we identified 96 Japanese flounder (Paralichthys olivaceus) miRNAs responsive to the infection of Edwardsiella tarda, a bacterial pathogen to fish as well as humans. In the current study, we examined the regulation and function of one novel miRNA, i.e., pol-miR-novel_171, from the above 96 miRNA pool. We found that pol-miR-novel_171 expression was regulated by E. tarda and megalocytivirus in a pathogen-specific manner, and that pol-miR-novel_171 targeted the gene of FAM49B (family with sequence similarity 49 member B) of flounder (named PoFAM49B) by negative interaction with the 3'-UTR of PoFAM49B. To date, the function fish FAM49B is unknown. We found that PoFAM49B expressed in multiple tissues of flounder, and recombinant PoFAM49B interacted with and inhibited the growth of Gram-negative bacterial pathogens. Interference with PoFAM49B expression in flounder cells promoted E. tarda infection. Similar effects on E. tarda infection were observed with pol-miR-novel_171 overexpression. Consistently, in vivo knockdown of PoFAM49B in flounder enhanced E. tarda dissemination in fish tissues. Furthermore, interference with PoFAM49B expression, or overexpression of pol-miR-novel_171, promoted apoptosis of flounder cells, while in vitro and in vivo knockdown of PoFAM49B augmented the expressions of key apoptosis-associated genes. These results revealed for the first time the immune function of fish FAM49B and the regulatory mechanism of a novel fish miRNA by demonstrating that pol-miR-novel_171, via PoFAM49B, played a critical role in apoptosis and anti-bacterial immunity.
资助项目	National Natural Science Foundation of China[31730100] ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2018SDKJ0302-2] ; National Key R&D Program of China[2018YFD0900500] ; AoShan Talents Program - Qingdao National Laboratory for Marine Science and Technology[2015ASTP] ; Taishan Scholar Program of Shandong Province
WOS研究方向	Fisheries ; Immunology ; Zoology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000517853000017
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/165574]
专题	海洋研究所_实验海洋生物学重点实验室
通讯作者	Sun, Li
作者单位	1.Chinese Acad Sci, Ctr Ocean Megasci, Inst Oceanol, CAS Key Lab Expt Marine Biol, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Biol & Biotechnol, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Li, Wen-rui,Guan, Xiao-lu,Jiang, Shuai,et al. The novel fish miRNA pol-miR-novel_171 and its target gene FAM49B play a critical role in apoptosis and bacterial infection[J]. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY,2020,106:10.
APA	Li, Wen-rui,Guan, Xiao-lu,Jiang, Shuai,&Sun, Li.(2020).The novel fish miRNA pol-miR-novel_171 and its target gene FAM49B play a critical role in apoptosis and bacterial infection.DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY,106,10.
MLA	Li, Wen-rui,et al."The novel fish miRNA pol-miR-novel_171 and its target gene FAM49B play a critical role in apoptosis and bacterial infection".DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 106(2020):10.