PMID- 30619352 OWN - NLM STAT- MEDLINE DCOM- 20191125 LR - 20200309 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 9 DP - 2018 TI - Shrimp miR-1000 Functions in Antiviral Immunity by Simultaneously Triggering the Degradation of Two Viral mRNAs. PG - 2999 LID - 10.3389/fimmu.2018.02999 [doi] LID - 2999 AB - MicroRNAs (miRNAs) function as crucial suppressors of gene expression via translational repression or direct mRNA degradation. However, the mechanism of multi-gene regulation by a host miRNA in antiviral immunity has not been extensively explored. In this study, the regulation of two white spot syndrome virus (WSSV) genes by its host (Marsupenaeus japonicus shrimp) miRNA (shrimp miR-1000) was characterized. The miRNA target gene prediction showed that only two virus genes (wsv191 and wsv407) might be the targets of miR-1000. The results of insect cell transfection assays revealed that shrimp miR-1000 could target multiple virus genes (wsv191 and wsv407). The mRNA degradation analysis and RNA FISH (fluorescence in situ hybridization) analysis indicated that miR-1000 triggered the mRNA degradation of target genes through 5'-3' exonucleolytic digestion in vivo and thereby inhibited the virus infection in shrimp. The miRNA-mediated 5'-3' exonucleolytic digestion of target mRNAs stopped near the 3'UTR (3'untranslated region) sequence complementary to the seed sequence of miR-1000. Therefore, our study provided novel insights into how a host miRNA targeted multiple viral genes and prevented host from virus infection. FAU - Gong, Yi AU - Gong Y AD - Laboratory for Marine Biology and Biotechnology of Qingdao National Laboratory for Marine Science and Technology, College of Life Sciences, Zhejiang University, Hangzhou, China. FAU - Ju, Chenyu AU - Ju C AD - Laboratory for Marine Biology and Biotechnology of Qingdao National Laboratory for Marine Science and Technology, College of Life Sciences, Zhejiang University, Hangzhou, China. FAU - Zhang, Xiaobo AU - Zhang X AD - Laboratory for Marine Biology and Biotechnology of Qingdao National Laboratory for Marine Science and Technology, College of Life Sciences, Zhejiang University, Hangzhou, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20181218 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (MicroRNAs) RN - 0 (RNA, Messenger) RN - 0 (RNA, Viral) SB - IM MH - Animals MH - Genes, Viral MH - Host-Pathogen Interactions/*genetics/immunology MH - MicroRNAs/*immunology/metabolism MH - Penaeidae/genetics/*immunology/virology MH - RNA, Messenger/metabolism MH - RNA, Viral/metabolism MH - Up-Regulation MH - Virus Diseases/genetics/*immunology/veterinary/virology MH - White spot syndrome virus 1/genetics/*immunology PMC - PMC6305465 OTO - NOTNLM OT - mRNA degradation OT - shrimp miR-1000 OT - virus-host interactions OT - white spot syndrome virus gene OT - wsv191 and wsv407 EDAT- 2019/01/09 06:00 MHDA- 2019/11/26 06:00 PMCR- 2018/01/01 CRDT- 2019/01/09 06:00 PHST- 2018/06/01 00:00 [received] PHST- 2018/12/04 00:00 [accepted] PHST- 2019/01/09 06:00 [entrez] PHST- 2019/01/09 06:00 [pubmed] PHST- 2019/11/26 06:00 [medline] PHST- 2018/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2018.02999 [doi] PST - epublish SO - Front Immunol. 2018 Dec 18;9:2999. doi: 10.3389/fimmu.2018.02999. eCollection 2018.