PMID- 29920289 OWN - NLM STAT- MEDLINE DCOM- 20181023 LR - 20181023 IS - 1872-7492 (Electronic) IS - 0168-1702 (Linking) VI - 253 DP - 2018 Jul 15 TI - Galectin-3 inhibits replication of porcine reproductive and respiratory syndrome virus by interacting with viral Nsp12 in vitro. PG - 87-91 LID - S0168-1702(18)30197-7 [pii] LID - 10.1016/j.virusres.2018.06.006 [doi] AB - Porcine galectin-3 (GAL3) is a 29-kDa protein encoded by a single gene, LGALS3, located on chromosome 1. Here, using a yeast two-hybrid screen of a cDNA library from porcine alveolar macrophage cells (PAMs), we report for the first time that GAL3 interacts with nonstructural protein 12 (Nsp12) of the porcine reproductive and respiratory syndrome virus (PRRSV). Although extensive research has focused on porcine reproductive and respiratory syndrome (PRRS), little is known about the pathogen and host interactions involving individual nonstructural viral proteins, especially Nsp12. Here, we showed that GAL3 interacted with viral Nsp12 following co-transfection of HEK293 cells with GAL3- and Nsp12-expressing plasmids. Additionally, we observed that PPRSV infection led to reduced GAL3 levels during the late phase of infection in both MARC-145 cells and PAMs. Importantly, GAL3 overexpression significantly suppressed the replication of both type 1 and 2 PRRSV strains, whereas knockout of endogenous LGALS3 in MARC-145 cells significantly increased viral titer and expression of the nucleocapsid protein. These results strongly support a direct inhibitory effect of GAL3 on PRRSV replication, which might contribute to an overall antiviral effect. Furthermore, our findings provide insights into the molecular basis of the role Nsp12 plays in PRRSV pathogenesis. CI - Copyright (c) 2018 Elsevier B.V. All rights reserved. FAU - Li, Liwei AU - Li L AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou 225009, PR China. FAU - Zhou, Yanjun AU - Zhou Y AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou 225009, PR China. FAU - Jiang, Yifeng AU - Jiang Y AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou 225009, PR China. FAU - Gao, Fei AU - Gao F AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou 225009, PR China. FAU - Shan, Tongling AU - Shan T AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou 225009, PR China. FAU - Zhao, Kuan AU - Zhao K AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China. FAU - Zhang, Yujiao AU - Zhang Y AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China. FAU - Li, Lin AU - Li L AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China. FAU - Tong, Guangzhi AU - Tong G AD - Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, PR China; Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonose, Yangzhou University, Yangzhou 225009, PR China. Electronic address: gztong@shvri.ac.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180618 PL - Netherlands TA - Virus Res JT - Virus research JID - 8410979 RN - 0 (Galectin 3) RN - 0 (Viral Nonstructural Proteins) SB - IM MH - Animals MH - Galectin 3/genetics/*metabolism MH - Host-Pathogen Interactions MH - Porcine Reproductive and Respiratory Syndrome/genetics/*metabolism/virology MH - Porcine respiratory and reproductive syndrome virus/genetics/*physiology MH - Protein Binding MH - Swine MH - Viral Nonstructural Proteins/genetics/*metabolism MH - *Virus Replication OTO - NOTNLM OT - Galectin-3 OT - Nsp12 OT - PRRSV EDAT- 2018/06/20 06:00 MHDA- 2018/10/24 06:00 CRDT- 2018/06/20 06:00 PHST- 2018/04/02 00:00 [received] PHST- 2018/06/05 00:00 [revised] PHST- 2018/06/15 00:00 [accepted] PHST- 2018/06/20 06:00 [pubmed] PHST- 2018/10/24 06:00 [medline] PHST- 2018/06/20 06:00 [entrez] AID - S0168-1702(18)30197-7 [pii] AID - 10.1016/j.virusres.2018.06.006 [doi] PST - ppublish SO - Virus Res. 2018 Jul 15;253:87-91. doi: 10.1016/j.virusres.2018.06.006. Epub 2018 Jun 18.