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- W2897779604 abstract "Streptococcus agalactiae is the major etiological agent of streptococcosis, which is responsible for huge economic losses in fishery, particularly in tilapia (Oreochromis niloticus) aquaculture. A research priority to control streptococcosis is to develop vaccines, so we sought to figure out the immunogenic proteins of S. agalactiae and screen the vaccine candidates for streptococcosis in the present study. Immunoproteomics, a technique involving two-dimensional gel electrophoresis (2-DE) followed by immunoblotting and mass spectrometry (MS), was employed to investigate the immunogenic proteins of S. agalactiae THN0901. Whole-cell soluble proteins were separated using 2-DE, and the immunogenic proteins were detected by western blotting using rabbit anti-S. agalactiae sera. A total of 17 immunoreactive spots on the soluble protein profile, corresponding to 15 different proteins, were identified by MALDI-TOF/TOF MS. Among the immunogenic proteins, GroEL attracted our attention as it was demonstrated to be immunogenic and protective against other streptococci. Nevertheless, to date, there have been no published reports on the immunogenicity and protective efficacy of GroEL against piscine S. agalactiae. Therefore, recombinant GroEL (rGroEL) was expressed in Escherichia coli BL21 (DE3) and purified by affinity chromatography. Immunization of tilapia with rGroEL resulted in an increase in antibody titers and conferred protection against S. agalactiae, with the relative percentage survival of 68.61 ± 7.39%. The immunoproteome in the present study narrows the scope of vaccine candidates, and the evaluation of GroEL immunogenicity and protective efficacy shows that GroEL forms an ideal candidate molecule in subunit vaccine against S. agalactiae." @default.
- W2897779604 created "2018-10-26" @default.
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- W2897779604 date "2019-01-01" @default.
- W2897779604 modified "2023-09-24" @default.
- W2897779604 title "GroEL, a novel vaccine candidate of piscine Streptococcus agalactiae identified by immunoproteome" @default.
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- W2897779604 doi "https://doi.org/10.1016/j.fsi.2018.10.020" @default.
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