PMID- 35452863 OWN - NLM STAT- MEDLINE DCOM- 20220524 LR - 20220524 IS - 1873-2542 (Electronic) IS - 0378-1135 (Linking) VI - 269 DP - 2022 Jun TI - miR-142-3p suppresses porcine reproductive and respiratory syndrome virus (PRRSV) infection by directly targeting Rac1. PG - 109434 LID - S0378-1135(22)00104-3 [pii] LID - 10.1016/j.vetmic.2022.109434 [doi] AB - Porcine reproductive and respiratory syndrome (PRRS) caused by PRRS virus (PRRSV) has been recognized as one of the severest epidemics in pigs worldwide. microRNAs (miRNAs) play important roles in a variety of biological processes, including cell differentiation, proliferation and death, as well as viral infections and antiviral immune responses. In this study, we found that miR-142-3p was expressed lower in cells susceptible to PRRSV infection than in cells less or no permissive to PRRSV infection. Subsequently, we showed that overexpression of miR-142-3p remarkably inhibited PRRSV infection in PAMs, while blockage of endogenous miR-142-3p significantly enhanced PRRSV replication. Then, we demonstrated that miR-142-3p directly targeted Ras-related C3 botulinum toxin substrate 1 (Rac1), a member of Rho GTPases family, by using luciferase reporter assay and UV cross-linking and immunoprecipitation (CLIP) assay. Importantly, we verified that miR-142-3p inhibited PRRSV entry into PAMs and accordingly suppressed PRRSV infection by downregulating Rac1 expression. These findings reveal an important role of miR-142-3p in modulating PRRSV infection and provide us with some ideas for developing novel antiviral therapy against PRRSV infection. CI - Copyright (c) 2022 Elsevier B.V. All rights reserved. FAU - Yao, Yao AU - Yao Y AD - State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China. FAU - Zhang, Xuan AU - Zhang X AD - State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China. FAU - Li, Sihan AU - Li S AD - State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China. FAU - Zhu, Yingqi AU - Zhu Y AD - State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China. FAU - Zheng, Xiaojie AU - Zheng X AD - State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China. FAU - Liu, Fang AU - Liu F AD - State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China. FAU - Feng, Wen-Hai AU - Feng WH AD - State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China. Electronic address: whfeng@cau.edu.cn. LA - eng PT - Journal Article DEP - 20220414 PL - Netherlands TA - Vet Microbiol JT - Veterinary microbiology JID - 7705469 RN - 0 (MicroRNAs) SB - IM MH - Animals MH - Cell Line MH - Host-Pathogen Interactions/genetics MH - *MicroRNAs/metabolism MH - *Porcine Reproductive and Respiratory Syndrome MH - *Porcine respiratory and reproductive syndrome virus/genetics/metabolism MH - Swine MH - *Swine Diseases MH - Virus Replication/physiology OTO - NOTNLM OT - Entry OT - MiR-142-3p OT - PRRSV OT - Rac1 EDAT- 2022/04/23 06:00 MHDA- 2022/05/25 06:00 CRDT- 2022/04/22 20:10 PHST- 2022/01/18 00:00 [received] PHST- 2022/03/23 00:00 [revised] PHST- 2022/04/10 00:00 [accepted] PHST- 2022/04/23 06:00 [pubmed] PHST- 2022/05/25 06:00 [medline] PHST- 2022/04/22 20:10 [entrez] AID - S0378-1135(22)00104-3 [pii] AID - 10.1016/j.vetmic.2022.109434 [doi] PST - ppublish SO - Vet Microbiol. 2022 Jun;269:109434. doi: 10.1016/j.vetmic.2022.109434. Epub 2022 Apr 14.