PMID- 32092857 OWN - NLM STAT- MEDLINE DCOM- 20210218 LR - 20210218 IS - 1999-4915 (Electronic) IS - 1999-4915 (Linking) VI - 12 IP - 2 DP - 2020 Feb 19 TI - Novel Lentivirus-Based Method for Rapid Selection of Inhibitory Nanobody against PRRSV. LID - 10.3390/v12020229 [doi] LID - 229 AB - The emergence and re-emergence of porcine reproductive and respiratory syndrome virus (PRRSV) has resulted in huge economic losses for the swine industry. Current vaccines are of limited efficacy against endemic circulating PRRSV variants. New strategies against PRRSV infection are in urgent need. Here, a nanobody library in Marc-145 cells is constructed for antiviral nanobodies. Nanobody encoding sequences from two non-immunized llamas were cloned to generate a pseudotyped lentiviral library. Several candidates were selected from survival cells post-PRRSV inoculation and further characterized. Nb9 was identified with strong antiviral activity. Moreover, Nb9 exerted antiviral activity via its interaction with PRRSV viral proteins, as revealed by immunofluorescence assay and Western blot. Taken together, the novel function-based screen of the lentivirus nanobody library, instead of the conventional affinity-based screen, offers an alternative strategy for antiviral reagents against PRRSV and other pathogens. FAU - Liu, Ze-Hui AU - Liu ZH AD - Institute of Preventive Veterinary Medicine, College of Animal Sciences of Zhejiang University, Hangzhou 310058, China. AD - Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou 310058, China. FAU - Lei, Kai-Xia AU - Lei KX AD - Institute of Preventive Veterinary Medicine, College of Animal Sciences of Zhejiang University, Hangzhou 310058, China. AD - Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou 310058, China. FAU - Han, Guang-Wei AU - Han GW AD - Institute of Preventive Veterinary Medicine, College of Animal Sciences of Zhejiang University, Hangzhou 310058, China. AD - Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou 310058, China. FAU - Xu, Hui-Ling AU - Xu HL AD - Institute of Preventive Veterinary Medicine, College of Animal Sciences of Zhejiang University, Hangzhou 310058, China. AD - Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou 310058, China. FAU - He, Fang AU - He F AD - Institute of Preventive Veterinary Medicine, College of Animal Sciences of Zhejiang University, Hangzhou 310058, China. AD - Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou 310058, China. LA - eng PT - Journal Article DEP - 20200219 PL - Switzerland TA - Viruses JT - Viruses JID - 101509722 RN - 0 (Antiviral Agents) RN - 0 (Peptide Library) RN - 0 (Single-Domain Antibodies) SB - IM MH - Animals MH - Antiviral Agents/*pharmacology MH - Camelids, New World MH - Cell Line MH - Lentivirus/*genetics MH - Peptide Library MH - Porcine respiratory and reproductive syndrome virus/*drug effects MH - Single-Domain Antibodies/genetics/*pharmacology MH - Swine MH - Virus Replication/drug effects PMC - PMC7077216 OTO - NOTNLM OT - PRRSV OT - antiviral strategy OT - lentivirus based nanobody library OT - nanobody selection COIS- The authors declare no conflict of interests. EDAT- 2020/02/26 06:00 MHDA- 2021/02/20 06:00 PMCR- 2020/02/01 CRDT- 2020/02/26 06:00 PHST- 2019/12/16 00:00 [received] PHST- 2020/02/11 00:00 [revised] PHST- 2020/02/17 00:00 [accepted] PHST- 2020/02/26 06:00 [entrez] PHST- 2020/02/26 06:00 [pubmed] PHST- 2021/02/20 06:00 [medline] PHST- 2020/02/01 00:00 [pmc-release] AID - v12020229 [pii] AID - viruses-12-00229 [pii] AID - 10.3390/v12020229 [doi] PST - epublish SO - Viruses. 2020 Feb 19;12(2):229. doi: 10.3390/v12020229.