Screening and identification of nucleocapsid protein-nanobodies that inhibited Newcastle disease virus replication in DF-1 cells

被引:3
|
作者
Fan, Wenqi [1 ,2 ]
Ji, Pinpin [1 ,2 ]
Sun, Xuwen [1 ,2 ]
Kong, Min [1 ,2 ]
Zhou, Ning [1 ,2 ]
Zhang, Qiang [1 ,2 ]
Wang, Ying [1 ,2 ]
Liu, Qianqian [1 ,2 ]
Li, Xiaoxuan [1 ,2 ]
Zhou, En-Min [1 ,2 ]
Zhao, Qin [1 ,2 ]
Sun, Yani [1 ,2 ]
机构
[1] Northwest Agr & Forestry Univ, Coll Vet Med, Dept Prevent Vet Med, Xianyang, Peoples R China
[2] Minist Agr, Sci Observing & Expt Stn Vet Pharmacol & Diagnost, Yangling, Peoples R China
基金
国家重点研发计划;
关键词
nanobody; Newcastle disease virus; nucleocapsid protein; viral replication; inhibition; ANTIBODIES; STRAINS; CHINA;
D O I
10.3389/fmicb.2022.956561
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Newcastle disease (ND) is an acute and highly contagious infectious disease found in poultry. Although commercial ND virus (NDV) vaccines are universally used, some case reports persistently documented vaccination failure. Therefore, novel strategies are still required to control the occurrence of the disease in chickens. Recently, nanobodies (Nbs), which have the advantages of small molecular weight and low production costs, have been shown to be promising therapeutics against viral infection. In the present study, a total of 16 Nbs against NDV nucleocapsid protein (NP) were screened from two libraries against NDV using phage display technology. Of the 16 screened Nbs, eight were prevented from binding to NDV NP protein through administering positive chicken sera for anti-NDV antibodies, indicating that the epitopes recognized by these eight Nbs were able to induce the immune response after the chickens were infected with NDV stock. Subsequently, transfection assay, construction of recombinant DF-1 cells capable of expressing different nanobodies and viral inhibition assay were used to screen the nanobodies inhibiting NDV replication. The results demonstrated that Nb18, Nb30, and Nb88 significantly inhibited the replication of Class I and different genotypes of Class II NDV strains in DF-1 cells when they were expressed in the cytoplasm. Collectively, these nanobodies provided new tools for researching the functions of NDV NP protein and may be used as a novel strategy for designing drugs against NDV infection in chickens.
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页数:12
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