Comprehensive Analysis and Characterization of Linear Antigenic Domains on HN Protein from Genotype VII Newcastle Disease Virus Using Yeast Surface Display System.

Comprehensive Analysis and Characterization of Linear Antigenic Domains on HN Protein from Genotype VII Newcastle Disease Virus Using Yeast Surface Display System.
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DOI:
10.1371/journal.pone.0131723
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发表时间:
2015
期刊:
影响因子:
3.7
通讯作者:
Liu H
Liu H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Li T;Wang G;Shi B;Liu P;Si W;Wang B;Jiang L;Zhou L;Xiu J;Liu H

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基因VII型纽卡斯尔病病毒(NDV)的流行对世界范围内的养禽业构成了极大的威胁。血凝素-神经氨酸酶(HN)是NDV的一种膜蛋白,在NDV感染中起重要作用,已报道抗HN抗体可保护鸡免受NDV感染。在这项研究中,我们全面分析了在体内抗体反应的线性抗原结构域的HN蛋白基因型VII NDV使用酵母表面展示系统。结果表明,HN蛋白有4个不同的抗原区,分别为P1(1- 52 aa)、P2(53- 192 aa)、P3(193- 302 aa)和P4(303- 571 aa)。流式细胞仪和ELISA分析表明,P2是主要的线性抗原结构域,具有保护大多数鸡免受NDV攻击的免疫原性效力。而P1、P3和P4结构域在体内表现出较弱的抗原性,不能保护鸡免受NDV攻击。这些结果为进一步了解新城疫病毒HN株在体内诱导的体液免疫应答特性提供了重要依据。
Circulation of genotype VII Newcastle disease virus (NDV) has posed a great threat for the poultry industry worldwide. Antibodies against Hemagglutinin-neuraminidase (HN), a membrane protein of NDV with critical roles in NDV infection, have been reported to provide chickens protection from NDV infection. In this study, we comprehensively analyzed the in vivo antibody responses against the linear antigenic domains of the HN protein from genotype VII NDV using a yeast surface display system. The results revealed four distinct regions of HN, P1 (1-52aa), P2 (53-192aa), P3 (193-302aa) and P4 (303-571aa), respectively, according to their antigenic potency. Analysis by FACS and ELISA assay indicated P2 to be the dominant linear antigenic domain, with the immunogenic potency to protect the majority of chickens from NDV challenge. In contrast, the P1, P3 and P4 domains showed weak antigenicity in vivo and could not protect chickens from NDV challenge. These results provide important insight into the characteristic of humoral immune responses elicited by HN of NDV in vivo.
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