A shared antigen among Vibrio species: Outer membrane protein-OmpK as a versatile Vibriosis vaccine candidate in Orange-spotted grouper (Epinephelus coioides)
文献类型： 外文期刊
作者： Li, Ningqiu 1 ; Yang, Zhihui 1 ; Bai, Junjie 1 ; Fu, Xiaozhe 1 ; Liu, Lihui 1 ; Shi, Cunbin 1 ; Wu, Shuqin 1 ;
作者机构： 1.Pearl River Fisheries Res Inst, CAFS, Guangdong Key Lab Aquat Anim ImmunoTechnol, Guangzhou 510380, Guangdong, Peoples R China
关键词： cross-protective-cross-protective immune response
期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.581； 五年影响因子：4.851 ）
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收录情况： SCI
摘要： The outer membrane protein-OmpK has been considered as a vaccine candidate for the prevention of infections due to Vibrio harveyi, Vibrio alginolyticus and Vibrio parahaemolyticus in fish. Interestingly, the polyclonal antibody raised against the recombinant OmpK from V. harveyi strain EcGs020802 recognized the OmpK homologues from other strains of Vibrio species by immunoblotting. The ompK genes from 19 Vibrio strains including V. harveyi (11), V. alginolyticus (6) and V parahaemolyticus (2) were then cloned and sequenced. Alignment analysis based on the amino acid sequences indicated that the OmpK from V harveyi strain EcGs020802 had 71.7-99.2% of identities with those from V. harveyi, V. alginolyticus and V parahaemolyricus. Western blot analysis revealed that the corresponding native proteins ranged between 28 and 31 kDa, consistent with predicated molecular weight of OmpK in Vibrio strains. Furthermore, the cross-protective property of recombinant OmpK was evaluated through challenge with heterogeneous virulent Vibrio strains in Orange-spotted groupers (Epinephelus coioides). Orange-spotted groupers vaccinated with recombinant OmpK were more tolerant of the infection by virulent Vibrio strains and their relative percentage survival (RPS) was correlative with the degree of the identity of deduced amino acid sequences of their OmpK. Taken together, the OmpK is a conserved protective antigen among tested Vibrio species and might be a potentially versatile vaccine candidate for the prevention of infections due to V harveyi, V alginolyticus and V. parahaemolyticus. (C) 2010 Elsevier Ltd. All rights reserved.
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