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Infection and adaption-based proteomic changes of Streptococcus suis serotype 2 in a pig model

文献类型： 外文期刊

作者： Yu, Yanfei 1 ; Qian, Yunyun 1 ; Du, Dechao 1 ; Li, Quan 1 ; Xu, Chenyang 1 ; Liu, Hanze 1 ; Chen, Mianmian 1 ; Yao, Huoch 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Vet Med, Minist Agr, Key Lab Anim Bacteriol, Nanjing 210095, Jiangsu, Peoples R China

2.Nanjing Agr Univ, OIE Swine Streptococcosis Diagnost Lab, Nanjing 210095, Jiangsu, Peoples R China

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

关键词： Streptococcus suis serotype 2; Comparative proteomics; In vivo; Virulence; adhE

期刊名称：JOURNAL OF PROTEOMICS （ 影响因子：4.044； 五年影响因子：4.02 ）

ISSN： 1874-3919

年卷期： 2018 年 180 卷

页码：

收录情况： SCI

摘要： Streptococcus suis (S. suis) is an emerging zoonotic agent that is responsible for significant economic losses to the porcine industry worldwide. However, most research regarding the pathogenic mechanisms has used in vitro cultures of S. suis, which may not provide an accurate representation of the in vivo biological activities. In this study, 188 differential abundance S. suis proteins were identified in in vivo samples obtained from the blood of the infected pigs These were compared with in vitro samples by a Tandem Mass Tags (TMT) experiment. Thus, a virulence associated network was established using the enriched differential abundance proteins (obtained via bioinformatics analysis in this study) and the previously reported putative virulence factors associated with in vivo infection. One of the most important up-regulated hubs in this network, adhE (an acetaldehyde-CoA/alcohol dehydrogenase) was found. Furthermore, knocking out adhE in S. suis serotype 2 strain ZY05719 decreased virulence Cell culture experiments and far western blot analysis showed that adhE is involved in adhesion to Caco-2 cells, Hsp60 could be one of the receptors for this protein. Significance: This study is a systematical research to identify in vivo regulated virulence associated proteins of S. suis in pigs. It constructs a network consisting of in vivo infection related factors for the first time to get to know the coordinated actions of a multitude of factors that lead to host pathogenicity and filter the most important hubs. The individual factors that contribute to infection is also identified. A novel differential protein adhE which is one of the most important hubs of this network and is up regulated in abundance in vivo is found to moonlight as an important adhesion by binding Hsp60 and finally contributes to virulence.

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