A Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content>
ABSTRACT Many pathogens produce the β-(1−6)-linked poly-N-acetylglucosamine (PNAG) surface polysaccharide that is being developed as a broadly protective antimicrobial vaccine. However, it is unknown whether systemically injected PNAG vaccines or antibodies would provide protective immunity against...
Guardado en:
| Autores principales: | , , , , , , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
American Society for Microbiology
2014
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/c0a6644caac94e5d8275ec36054581d6 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:doaj.org-article:c0a6644caac94e5d8275ec36054581d6 |
|---|---|
| record_format |
dspace |
| spelling |
oai:doaj.org-article:c0a6644caac94e5d8275ec36054581d62021-11-15T15:45:12ZA Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content>10.1128/mBio.00974-142150-7511https://doaj.org/article/c0a6644caac94e5d8275ec36054581d62014-05-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mBio.00974-14https://doaj.org/toc/2150-7511ABSTRACT Many pathogens produce the β-(1−6)-linked poly-N-acetylglucosamine (PNAG) surface polysaccharide that is being developed as a broadly protective antimicrobial vaccine. However, it is unknown whether systemically injected PNAG vaccines or antibodies would provide protective immunity against pathogens confined to the gastrointestinal tract such as Shiga toxin (Stx)-producing Escherichia coli (STEC), an important group of gastrointestinal (GI) pathogens for which effective immunotherapeutics are lacking. To ascertain whether systemic IgG antibody to PNAG impacts this infectious situation, a vaccine consisting of a synthetic nonamer of nonacetylated PNAG, 9GlcNH2, conjugated to the Shiga toxin 1b subunit (9GlcNH2-Stx1b) was produced. Rabbit antibodies raised to the conjugate vaccine were tested for bacterial killing and toxin neutralization in vitro and protection against infection in infant mice. Cell surface PNAG was detected on all 9 STEC isolates tested, representing 6 STEC serogroups, including E. coli O157:H7. Antibody to the 9GlcNH2-Stx1b conjugate neutralized Stx1 potently and Stx2 modestly. For O157:H7 and O104:H4 STEC strains, antibodies elicited by the 9GlcNH2-Stx1b conjugate possessed opsonic killing and bactericidal activity. Following intraperitoneal injection, antibodies to both PNAG and Stx were needed for infant mouse protection against O157 STEC. These antibodies also mediated protection against the Stx2-producing O104:H4 strain that was the cause of a recent outbreak in Germany, although sufficient doses of antibody to PNAG alone were protective against this strain in infant mice. Our observations suggest that vaccination against both PNAG and Stx, using a construct such as the 9GlcNH2-Stx1b conjugate vaccine, would be protective against a broad range of STEC serogroups. IMPORTANCE The presence of poly-N-acetylglucosamine (PNAG) on many pathogens presents an opportunity to target this one structure with a multispecies vaccine. Whether antibodies to PNAG can protect against pathogens confined to the gastrointestinal tract is not known. As Shiga toxin (Stx)-producing Escherichia coli (STEC) bacteria are serious causes of infection whose virulence is dependent on elaboration of Stx, we prepared a vaccine containing a synthetic nonamer of PNAG (9GlcNH2) conjugated to Shiga toxin 1b subunit (9GlcNH2-Stx1b) to evaluate bacterial killing, toxin neutralization, and protective efficacy in infant mice. All nine (100%) clinical strains of STEC from different serogroups expressed PNAG. Vaccine-induced antibody mediated in vitro killing of STEC and neutralization of both Stx1 and Stx2. Passive administration of antibody to the conjugate showed protection requiring immunity to both PNAG and Stx for O157 strains, although for an O104 strain, antibody to PNAG alone was protective. Immunity to PNAG may contribute to protection against STEC infections.Xi LuDavid SkurnikClarissa PozziDamien RouxColette Cywes-BentleyJennifer M. RitchieDiana MuneraMarina L. GeningYury E. TsvetkovNikolay E. NifantievMatthew K. WaldorGerald B. PierAmerican Society for MicrobiologyarticleMicrobiologyQR1-502ENmBio, Vol 5, Iss 2 (2014) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Microbiology QR1-502 |
| spellingShingle |
Microbiology QR1-502 Xi Lu David Skurnik Clarissa Pozzi Damien Roux Colette Cywes-Bentley Jennifer M. Ritchie Diana Munera Marina L. Gening Yury E. Tsvetkov Nikolay E. Nifantiev Matthew K. Waldor Gerald B. Pier A Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content> |
| description |
ABSTRACT Many pathogens produce the β-(1−6)-linked poly-N-acetylglucosamine (PNAG) surface polysaccharide that is being developed as a broadly protective antimicrobial vaccine. However, it is unknown whether systemically injected PNAG vaccines or antibodies would provide protective immunity against pathogens confined to the gastrointestinal tract such as Shiga toxin (Stx)-producing Escherichia coli (STEC), an important group of gastrointestinal (GI) pathogens for which effective immunotherapeutics are lacking. To ascertain whether systemic IgG antibody to PNAG impacts this infectious situation, a vaccine consisting of a synthetic nonamer of nonacetylated PNAG, 9GlcNH2, conjugated to the Shiga toxin 1b subunit (9GlcNH2-Stx1b) was produced. Rabbit antibodies raised to the conjugate vaccine were tested for bacterial killing and toxin neutralization in vitro and protection against infection in infant mice. Cell surface PNAG was detected on all 9 STEC isolates tested, representing 6 STEC serogroups, including E. coli O157:H7. Antibody to the 9GlcNH2-Stx1b conjugate neutralized Stx1 potently and Stx2 modestly. For O157:H7 and O104:H4 STEC strains, antibodies elicited by the 9GlcNH2-Stx1b conjugate possessed opsonic killing and bactericidal activity. Following intraperitoneal injection, antibodies to both PNAG and Stx were needed for infant mouse protection against O157 STEC. These antibodies also mediated protection against the Stx2-producing O104:H4 strain that was the cause of a recent outbreak in Germany, although sufficient doses of antibody to PNAG alone were protective against this strain in infant mice. Our observations suggest that vaccination against both PNAG and Stx, using a construct such as the 9GlcNH2-Stx1b conjugate vaccine, would be protective against a broad range of STEC serogroups. IMPORTANCE The presence of poly-N-acetylglucosamine (PNAG) on many pathogens presents an opportunity to target this one structure with a multispecies vaccine. Whether antibodies to PNAG can protect against pathogens confined to the gastrointestinal tract is not known. As Shiga toxin (Stx)-producing Escherichia coli (STEC) bacteria are serious causes of infection whose virulence is dependent on elaboration of Stx, we prepared a vaccine containing a synthetic nonamer of PNAG (9GlcNH2) conjugated to Shiga toxin 1b subunit (9GlcNH2-Stx1b) to evaluate bacterial killing, toxin neutralization, and protective efficacy in infant mice. All nine (100%) clinical strains of STEC from different serogroups expressed PNAG. Vaccine-induced antibody mediated in vitro killing of STEC and neutralization of both Stx1 and Stx2. Passive administration of antibody to the conjugate showed protection requiring immunity to both PNAG and Stx for O157 strains, although for an O104 strain, antibody to PNAG alone was protective. Immunity to PNAG may contribute to protection against STEC infections. |
| format |
article |
| author |
Xi Lu David Skurnik Clarissa Pozzi Damien Roux Colette Cywes-Bentley Jennifer M. Ritchie Diana Munera Marina L. Gening Yury E. Tsvetkov Nikolay E. Nifantiev Matthew K. Waldor Gerald B. Pier |
| author_facet |
Xi Lu David Skurnik Clarissa Pozzi Damien Roux Colette Cywes-Bentley Jennifer M. Ritchie Diana Munera Marina L. Gening Yury E. Tsvetkov Nikolay E. Nifantiev Matthew K. Waldor Gerald B. Pier |
| author_sort |
Xi Lu |
| title |
A Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content> |
| title_short |
A Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content> |
| title_full |
A Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content> |
| title_fullStr |
A Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content> |
| title_full_unstemmed |
A Poly-<italic toggle="yes">N</italic>-Acetylglucosamine−Shiga Toxin Broad-Spectrum Conjugate Vaccine for Shiga Toxin-Producing <named-content content-type="genus-species">Escherichia coli</named-content> |
| title_sort |
poly-<italic toggle="yes">n</italic>-acetylglucosamine−shiga toxin broad-spectrum conjugate vaccine for shiga toxin-producing <named-content content-type="genus-species">escherichia coli</named-content> |
| publisher |
American Society for Microbiology |
| publishDate |
2014 |
| url |
https://doaj.org/article/c0a6644caac94e5d8275ec36054581d6 |
| work_keys_str_mv |
AT xilu apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT davidskurnik apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT clarissapozzi apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT damienroux apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT colettecywesbentley apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT jennifermritchie apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT dianamunera apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT marinalgening apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT yuryetsvetkov apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT nikolayenifantiev apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT matthewkwaldor apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT geraldbpier apolyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT xilu polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT davidskurnik polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT clarissapozzi polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT damienroux polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT colettecywesbentley polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT jennifermritchie polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT dianamunera polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT marinalgening polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT yuryetsvetkov polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT nikolayenifantiev polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT matthewkwaldor polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent AT geraldbpier polyitalictoggleyesnitalicacetylglucosamineshigatoxinbroadspectrumconjugatevaccineforshigatoxinproducingnamedcontentcontenttypegenusspeciesescherichiacolinamedcontent |
| _version_ |
1718427609465880576 |