StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice.
Infection with Streptococcus pyogenes (S. pyogenes) can result in several diseases, particularly in children. S. pyogenes M protein is the major virulence factor, and certain regions of its N-terminus can trigger autoimmune sequelae such as rheumatic fever in susceptible individuals with untreated g...
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doaj-0235416479ea4224bc8102df7085ffaf2020-11-25T01:19:56ZengPublic Library of Science (PLoS)PLoS ONE1932-62032013-01-0184e6096910.1371/journal.pone.0060969StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice.Edilberto PostolRaquel AlencarFabio T HigaSamar Freschi de BarrosLea M F DemarchiJorge KalilLuiza GuilhermeInfection with Streptococcus pyogenes (S. pyogenes) can result in several diseases, particularly in children. S. pyogenes M protein is the major virulence factor, and certain regions of its N-terminus can trigger autoimmune sequelae such as rheumatic fever in susceptible individuals with untreated group A streptococcal pharyngitis. In a previous study, we utilized a large panel of human peripheral blood cells to define the C-terminal protective epitope StreptInCor (medical identity), which does not induce autoimmune reactions. We recently confirmed the results in HLA-transgenic mice. In the present study, we extended the experimental assays to outbred animals (Swiss mice). Herein, we demonstrate high titers of StreptInCor-specific antibodies, as well as appropriate T-cell immune responses. No cross-reaction to cardiac myosin was detected. Additionally, immunized Swiss mice exhibited 87% survival one month after challenge with S. pyogenes. In conclusion, the data presented herein reinforce previous results in humans and animals and further emphasize that StreptInCor could be an effective and safe vaccine for the prevention of S. pyogenes infections.http://europepmc.org/articles/PMC3620221?pdf=render |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Edilberto Postol Raquel Alencar Fabio T Higa Samar Freschi de Barros Lea M F Demarchi Jorge Kalil Luiza Guilherme |
spellingShingle |
Edilberto Postol Raquel Alencar Fabio T Higa Samar Freschi de Barros Lea M F Demarchi Jorge Kalil Luiza Guilherme StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice. PLoS ONE |
author_facet |
Edilberto Postol Raquel Alencar Fabio T Higa Samar Freschi de Barros Lea M F Demarchi Jorge Kalil Luiza Guilherme |
author_sort |
Edilberto Postol |
title |
StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice. |
title_short |
StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice. |
title_full |
StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice. |
title_fullStr |
StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice. |
title_full_unstemmed |
StreptInCor: a candidate vaccine epitope against S. pyogenes infections induces protection in outbred mice. |
title_sort |
streptincor: a candidate vaccine epitope against s. pyogenes infections induces protection in outbred mice. |
publisher |
Public Library of Science (PLoS) |
series |
PLoS ONE |
issn |
1932-6203 |
publishDate |
2013-01-01 |
description |
Infection with Streptococcus pyogenes (S. pyogenes) can result in several diseases, particularly in children. S. pyogenes M protein is the major virulence factor, and certain regions of its N-terminus can trigger autoimmune sequelae such as rheumatic fever in susceptible individuals with untreated group A streptococcal pharyngitis. In a previous study, we utilized a large panel of human peripheral blood cells to define the C-terminal protective epitope StreptInCor (medical identity), which does not induce autoimmune reactions. We recently confirmed the results in HLA-transgenic mice. In the present study, we extended the experimental assays to outbred animals (Swiss mice). Herein, we demonstrate high titers of StreptInCor-specific antibodies, as well as appropriate T-cell immune responses. No cross-reaction to cardiac myosin was detected. Additionally, immunized Swiss mice exhibited 87% survival one month after challenge with S. pyogenes. In conclusion, the data presented herein reinforce previous results in humans and animals and further emphasize that StreptInCor could be an effective and safe vaccine for the prevention of S. pyogenes infections. |
url |
http://europepmc.org/articles/PMC3620221?pdf=render |
work_keys_str_mv |
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