The swine CD81 enhances E2-based DNA vaccination against classical swine fever

被引：7

作者：

Li, Wenliang ^{[1
]}

Mao, Li

Zhou, Bin ^{[1
,2
]}

Liu, Xia ^{[1
]}

Yang, Leilei ^{[1
]}

Zhang, Wenwen ^{[1
]}

Jiang, Jieyuan ^{[1
]}

机构：

[1] Jiangsu Acad Agr Sci, Inst Vet Med, Key Lab Vet Biol Engn & Technol, Minist Agri,Natl Ctr Engn Res Vet Bioprod, Nanjing 210014, Jiangsu, Peoples R China

[2] Nanjing Agr Univ, Coll Vet Med, Nanjing 210095, Jiangsu, Peoples R China

来源：

VACCINE | 2015年 / 33卷 / 30期

关键词：

CSFV; DNA vaccine; CD81; E2; glycoprotein; Adjuvant; ANTIBODY-PRODUCTION; MARKER VACCINE; PIG CD81; VIRUS; RESPONSES; IMMUNIZATION; EXPRESSION; PROTECTION; CHALLENGE; PROTEINS;

D O I：

10.1016/j.vaccine.2015.05.055

中图分类号：

R392 [医学免疫学]; Q939.91 [免疫学];

学科分类号：

100102 ;

摘要：

Classical swine fever (CSF) is a highly contagious and economically important viral disease that affects the pig industry worldwide. The glycoprotein E2 of CSFV can induce neutralizing antibodies and protective immunity, and is widely used for novel vaccine development. The objective of this study was to explore whether a tetraspanin molecule CD81 could improve the immune responses of an E2-based DNA vaccine. Plasmids pVAX-CD81, pVAX-E2 and pVAX-CD81-E2 were constructed and the expression of target proteins was confirmed in BHK-21 cells by indirect immunofluorescence assay. BALB/c mice were divided into 5 groups and immunized with different plasmids (pVAX-E2, pVAX-CD81-E2, pVAX-E2 + pVAX-CD81, pVAX-CD81 and PBS) three times with two weeks interval. The results showed that the introduction of CD81 promoted higher humoral and cellular immune responses than E2 expression alone (P < 0.05). In addition, immunization with pVAX-CD81-E2 induced stronger immune responses than pVAX-E2 + pVAX-CD81. Furthermore, four groups of pigs were immunized with pVAX-E2, pVAX-CD81-E2, pVAX-CD81 and PBS, respectively. Humoral and cellular immune responses detection showed similar results with those in mice. Compared to pVAX-E2, pVAX-CD81-E2 induced higher titers of neutralizing antibodies after viral challenge and conferred stronger protection. These results confirmed the capacity of swine CD81 enhancing the humoral and cellular responses with an adjuvant effect on CSFV DNA vaccine. This is the first report demonstrating the adjuvant effect of CD81 to enhance the DNA vaccination for swine pathogen. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：3542 / 3548

页数：7

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