Identification and immunoprotective analysis of an in vivo-induced Edwardsiella tarda antigen

doi:10.1016/j.fsi.2009.08.006

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	Identification and immunoprotective analysis of an in vivo-induced Edwardsiella tarda antigen
	Jiao, Xu-dong 1,2; Dang, Wei 1,2; Hu, Yong-hua 1; Sun, Li 1
刊名	FISH & SHELLFISH IMMUNOLOGY
	2009-11-01
卷号	27 期号:5 页码:633-638
关键词	Antigen Edwardsiella Tarda Iviat Subunit Vaccine Vaccine Delivery
ISSN号	1050-4648
DOI	10.1016/j.fsi.2009.08.006
文献子类	Article
英文摘要	Edwardsiella tarda is a severe aquaculture pathogen that can infect many important fish species cultured worldwide. The aim of this study was to evaluate the vaccine potential of an E. tarda antigen, Eta21, which was identified from a pathogenic E. tarda strain via the method of in vivo-induced antigen technology (IVIAT). Eta21 is 510-amino acid in length and shares similar to 58% sequence identity with a putative peptidase of several bacterial species. eta21 was subcloned into Escherichia colt, and recombinant Eta21 was purified as a histidine-tagged protein. When used as a subunit vaccine, purified recombinant Eta21 was effective against lethal E. tarda challenge in a Japanese flounder model. In order to improve the immunoprotective efficacy of Eta21, the chimera AgaV-Eta21 was constructed, which consists of Eta21 fused in-frame to the secretion domain of AgaV, an extracellular beta-agarase. E. coli DH5 alpha harboring plasmid pTAET21, which constitutively expresses agaV-eta21, was able to produce and secret AgaV-Eta21 into the extracellular milieu. Vaccination of Japanese flounder with live DH5 alpha/pTAET21 elicited immunoprotection that is significantly higher in level than that induced by vaccination with purified recombinant Eta21. Vaccination with DH5 alpha/pTAET21 and recombinant Eta21 both induced the production of specific serum antibodies at four to eight weeks post-vaccination. Taken together, these results demonstrate that Eta21, especially that delivered by DH5 alpha/pTAET21, is an effective vaccine candidate against E. tarda infection. (C) 2009 Elsevier Ltd. All rights reserved.; Edwardsiella tarda is a severe aquaculture pathogen that can infect many important fish species cultured worldwide. The aim of this study was to evaluate the vaccine potential of an E. tarda antigen, Eta21, which was identified from a pathogenic E. tarda strain via the method of in vivo-induced antigen technology (IVIAT). Eta21 is 510-amino acid in length and shares similar to 58% sequence identity with a putative peptidase of several bacterial species. eta21 was subcloned into Escherichia colt, and recombinant Eta21 was purified as a histidine-tagged protein. When used as a subunit vaccine, purified recombinant Eta21 was effective against lethal E. tarda challenge in a Japanese flounder model. In order to improve the immunoprotective efficacy of Eta21, the chimera AgaV-Eta21 was constructed, which consists of Eta21 fused in-frame to the secretion domain of AgaV, an extracellular beta-agarase. E. coli DH5 alpha harboring plasmid pTAET21, which constitutively expresses agaV-eta21, was able to produce and secret AgaV-Eta21 into the extracellular milieu. Vaccination of Japanese flounder with live DH5 alpha/pTAET21 elicited immunoprotection that is significantly higher in level than that induced by vaccination with purified recombinant Eta21. Vaccination with DH5 alpha/pTAET21 and recombinant Eta21 both induced the production of specific serum antibodies at four to eight weeks post-vaccination. Taken together, these results demonstrate that Eta21, especially that delivered by DH5 alpha/pTAET21, is an effective vaccine candidate against E. tarda infection. (C) 2009 Elsevier Ltd. All rights reserved.
学科主题	Fisheries ; Immunology ; Marine & Freshwater Biology ; Veterinary Sciences
URL标识	查看原文
语种	英语
WOS记录号	WOS:000271931000007
公开日期	2010-12-22
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/2931]
专题	海洋研究所_实验海洋生物学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jiao, Xu-dong,Dang, Wei,Hu, Yong-hua,et al. Identification and immunoprotective analysis of an in vivo-induced Edwardsiella tarda antigen[J]. FISH & SHELLFISH IMMUNOLOGY,2009,27(5):633-638.
APA	Jiao, Xu-dong,Dang, Wei,Hu, Yong-hua,&Sun, Li.(2009).Identification and immunoprotective analysis of an in vivo-induced Edwardsiella tarda antigen.FISH & SHELLFISH IMMUNOLOGY,27(5),633-638.
MLA	Jiao, Xu-dong,et al."Identification and immunoprotective analysis of an in vivo-induced Edwardsiella tarda antigen".FISH & SHELLFISH IMMUNOLOGY 27.5(2009):633-638.