PMID- 27010387 OWN - NLM STAT- MEDLINE DCOM- 20170222 LR - 20191210 IS - 1573-6776 (Electronic) IS - 0141-5492 (Linking) VI - 38 IP - 7 DP - 2016 Jul TI - Intracellularly expressed nanobodies against non-structural protein 4 of porcine reproductive and respiratory syndrome virus inhibit virus replication. PG - 1081-8 LID - 10.1007/s10529-016-2086-3 [doi] AB - OBJECTIVE: To isolate specific nanobodies to porcine reproductive and respiratory syndrome virus (PRRSV) non-structural protein 4 (Nsp4) and investigate their potential antiviral activities. RESULTS: Three PRRSV Nsp4-specific nanobodies were isolated from a phage display library of the variable domains of camelid heavy chain-only antibodies. Nanobody genes were introduced into MARC-145 cells using lentivirus vectors to establish cell lines stably expressing nanobodies. These intracellularly expressed nanobodies were tested for interaction with PRRSV-encoded Nsp4 within PRRSV-infected MARC-145 cells. Nb41 and Nb43 intrabodies each potently inhibited PRRSV replication, protected MARC-145 cells from PRRSV-induced cytopathic effect and fully blocked PRRSV replication at an MOI of 0.001 or lower. CONCLUSION: Intracellularly expressed Nb41 and Nb43 potently suppressed PRRSV replication in MARC-145 cells. Nanobodies hold great potential for development as novel antiviral treatments for PRRSV infection. FAU - Liu, Hongliang AU - Liu H AD - Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Liang, Chao AU - Liang C AD - Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Duan, Hong AU - Duan H AD - Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Zhang, Xiaobin AU - Zhang X AD - Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Wang, Xiangpeng AU - Wang X AD - Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Xiao, Shuqi AU - Xiao S AD - Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Zhou, En-Min AU - Zhou EM AUID- ORCID: 0000-0001-8942-013X AD - Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. zhouem@nwsuaf.edu.cn. LA - eng PT - Journal Article DEP - 20160324 PL - Netherlands TA - Biotechnol Lett JT - Biotechnology letters JID - 8008051 RN - 0 (Antiviral Agents) RN - 0 (Single-Domain Antibodies) RN - 0 (Viral Nonstructural Proteins) SB - IM MH - Animals MH - Antiviral Agents/immunology/*pharmacology MH - Cell Line MH - Chlorocebus aethiops MH - Porcine respiratory and reproductive syndrome virus/*drug effects MH - Single-Domain Antibodies/immunology/*pharmacology MH - Viral Nonstructural Proteins/*immunology MH - Virus Replication/*drug effects OTO - NOTNLM OT - Intrabody OT - Lentivirus OT - Nanobody OT - Non-structural protein 4 OT - Porcine reproductive and respiratory syndrome virus OT - Single-domain antibody EDAT- 2016/03/25 06:00 MHDA- 2017/02/23 06:00 CRDT- 2016/03/25 06:00 PHST- 2016/01/28 00:00 [received] PHST- 2016/03/17 00:00 [accepted] PHST- 2016/03/25 06:00 [entrez] PHST- 2016/03/25 06:00 [pubmed] PHST- 2017/02/23 06:00 [medline] AID - 10.1007/s10529-016-2086-3 [pii] AID - 10.1007/s10529-016-2086-3 [doi] PST - ppublish SO - Biotechnol Lett. 2016 Jul;38(7):1081-8. doi: 10.1007/s10529-016-2086-3. Epub 2016 Mar 24.