Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patie...
- Autores
- Di Gregorio, Sabrina Noelia; Weltman, Gabriela; Fabbri, Carolina; Fernández, Silvina; Zárate, Soledad; Smayevsky, Jorgelina; Power, Pablo; Campos, Josefina; Llarrull, Leticia Irene; Mollerach, Marta Eugenia
- Año de publicación
- 2024
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The mec-independent oxacillin non-susceptible S. aureus (MIONSA) strains represent a great clinical challenge, as they are not easily detected and can lead to treatment failure. However, the responsible molecular mechanisms are still very little understood. Here, we studied four clinical ST8-MSSA-t024 isolates recovered during the course of antibiotic treatment from a patient suffering successive ep-isodes of bacteremia. The first isolates (SAMS1, SAMS2, and SAMS3) were susceptible to cefoxitin and oxacillin. The last one (SA2) was susceptible to cefoxitin, resistant to oxacillin, lacked mecA/mecC genes, and had reduced susceptibility to teicoplanin. SA2 showed higher b-lactamase activity than SAMS1. However, b-lactamase hyperproduction could not be linked to oxacillin resistance as it was not inhibited by clavulanic acid, and no genetic changes that could account for its hyperproduction were found. Importantly, we hereby report the in vivo acquisition and coexistence of different adaptive mutations in genes associated with peptidoglycan synthesis (pbp2, rodA, stp1, yjbH, and yvqF/vraT), which is possibly related with the development of oxacillin resistance and reduced susceptibility to teicoplanin in SA2. Using three-dimensional models and PBP binding assays, we demonstrated the high contribution of the SA2 PBP2 Ala450Asp mutation to the observed oxacillin resistance phenotype. Our results should be considered as a warning for physicians and microbi-ologists in the region, as MIONSA detection and treatment represent an important clinical challenge.
Fil: Di Gregorio, Sabrina Noelia. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Weltman, Gabriela. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires;
Fil: Fabbri, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
Fil: Fernández, Silvina. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires;
Fil: Zárate, Soledad. Centro de Educaciones Médicas e Investigación Clínica "Norberto Quirno"; Argentina
Fil: Smayevsky, Jorgelina. Centro de Educaciones Médicas e Investigación Clínica "Norberto Quirno"; Argentina
Fil: Power, Pablo. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Campos, Josefina. Dirección Nacional de Instituto de Investigación.Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos G. Malbrán"; Argentina
Fil: Llarrull, Leticia Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina
Fil: Mollerach, Marta Eugenia. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina - Materia
-
Staphylococcus aureus
MIONSA
WGS
ST8
PBP2 - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/265764
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CONICET Digital (CONICET) |
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Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with BacteremiaDi Gregorio, Sabrina NoeliaWeltman, GabrielaFabbri, CarolinaFernández, SilvinaZárate, SoledadSmayevsky, JorgelinaPower, PabloCampos, JosefinaLlarrull, Leticia IreneMollerach, Marta EugeniaStaphylococcus aureusMIONSAWGSST8PBP2https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The mec-independent oxacillin non-susceptible S. aureus (MIONSA) strains represent a great clinical challenge, as they are not easily detected and can lead to treatment failure. However, the responsible molecular mechanisms are still very little understood. Here, we studied four clinical ST8-MSSA-t024 isolates recovered during the course of antibiotic treatment from a patient suffering successive ep-isodes of bacteremia. The first isolates (SAMS1, SAMS2, and SAMS3) were susceptible to cefoxitin and oxacillin. The last one (SA2) was susceptible to cefoxitin, resistant to oxacillin, lacked mecA/mecC genes, and had reduced susceptibility to teicoplanin. SA2 showed higher b-lactamase activity than SAMS1. However, b-lactamase hyperproduction could not be linked to oxacillin resistance as it was not inhibited by clavulanic acid, and no genetic changes that could account for its hyperproduction were found. Importantly, we hereby report the in vivo acquisition and coexistence of different adaptive mutations in genes associated with peptidoglycan synthesis (pbp2, rodA, stp1, yjbH, and yvqF/vraT), which is possibly related with the development of oxacillin resistance and reduced susceptibility to teicoplanin in SA2. Using three-dimensional models and PBP binding assays, we demonstrated the high contribution of the SA2 PBP2 Ala450Asp mutation to the observed oxacillin resistance phenotype. Our results should be considered as a warning for physicians and microbi-ologists in the region, as MIONSA detection and treatment represent an important clinical challenge.Fil: Di Gregorio, Sabrina Noelia. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Weltman, Gabriela. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires;Fil: Fabbri, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Fernández, Silvina. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires;Fil: Zárate, Soledad. Centro de Educaciones Médicas e Investigación Clínica "Norberto Quirno"; ArgentinaFil: Smayevsky, Jorgelina. Centro de Educaciones Médicas e Investigación Clínica "Norberto Quirno"; ArgentinaFil: Power, Pablo. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Campos, Josefina. Dirección Nacional de Instituto de Investigación.Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos G. Malbrán"; ArgentinaFil: Llarrull, Leticia Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Mollerach, Marta Eugenia. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaMDPI2024-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/265764Di Gregorio, Sabrina Noelia; Weltman, Gabriela; Fabbri, Carolina; Fernández, Silvina; Zárate, Soledad ; et al.; Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia; MDPI; Antibiotics; 13; 6; 6-2024; 554-5712079-6382CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3390/antibiotics13060554info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:21:50Zoai:ri.conicet.gov.ar:11336/265764instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:21:50.719CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia |
title |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia |
spellingShingle |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia Di Gregorio, Sabrina Noelia Staphylococcus aureus MIONSA WGS ST8 PBP2 |
title_short |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia |
title_full |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia |
title_fullStr |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia |
title_full_unstemmed |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia |
title_sort |
Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia |
dc.creator.none.fl_str_mv |
Di Gregorio, Sabrina Noelia Weltman, Gabriela Fabbri, Carolina Fernández, Silvina Zárate, Soledad Smayevsky, Jorgelina Power, Pablo Campos, Josefina Llarrull, Leticia Irene Mollerach, Marta Eugenia |
author |
Di Gregorio, Sabrina Noelia |
author_facet |
Di Gregorio, Sabrina Noelia Weltman, Gabriela Fabbri, Carolina Fernández, Silvina Zárate, Soledad Smayevsky, Jorgelina Power, Pablo Campos, Josefina Llarrull, Leticia Irene Mollerach, Marta Eugenia |
author_role |
author |
author2 |
Weltman, Gabriela Fabbri, Carolina Fernández, Silvina Zárate, Soledad Smayevsky, Jorgelina Power, Pablo Campos, Josefina Llarrull, Leticia Irene Mollerach, Marta Eugenia |
author2_role |
author author author author author author author author author |
dc.subject.none.fl_str_mv |
Staphylococcus aureus MIONSA WGS ST8 PBP2 |
topic |
Staphylococcus aureus MIONSA WGS ST8 PBP2 |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
The mec-independent oxacillin non-susceptible S. aureus (MIONSA) strains represent a great clinical challenge, as they are not easily detected and can lead to treatment failure. However, the responsible molecular mechanisms are still very little understood. Here, we studied four clinical ST8-MSSA-t024 isolates recovered during the course of antibiotic treatment from a patient suffering successive ep-isodes of bacteremia. The first isolates (SAMS1, SAMS2, and SAMS3) were susceptible to cefoxitin and oxacillin. The last one (SA2) was susceptible to cefoxitin, resistant to oxacillin, lacked mecA/mecC genes, and had reduced susceptibility to teicoplanin. SA2 showed higher b-lactamase activity than SAMS1. However, b-lactamase hyperproduction could not be linked to oxacillin resistance as it was not inhibited by clavulanic acid, and no genetic changes that could account for its hyperproduction were found. Importantly, we hereby report the in vivo acquisition and coexistence of different adaptive mutations in genes associated with peptidoglycan synthesis (pbp2, rodA, stp1, yjbH, and yvqF/vraT), which is possibly related with the development of oxacillin resistance and reduced susceptibility to teicoplanin in SA2. Using three-dimensional models and PBP binding assays, we demonstrated the high contribution of the SA2 PBP2 Ala450Asp mutation to the observed oxacillin resistance phenotype. Our results should be considered as a warning for physicians and microbi-ologists in the region, as MIONSA detection and treatment represent an important clinical challenge. Fil: Di Gregorio, Sabrina Noelia. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Weltman, Gabriela. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; Fil: Fabbri, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina Fil: Fernández, Silvina. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; Fil: Zárate, Soledad. Centro de Educaciones Médicas e Investigación Clínica "Norberto Quirno"; Argentina Fil: Smayevsky, Jorgelina. Centro de Educaciones Médicas e Investigación Clínica "Norberto Quirno"; Argentina Fil: Power, Pablo. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Campos, Josefina. Dirección Nacional de Instituto de Investigación.Administración Nacional de Laboratorios e Institutos de Salud "Dr. Carlos G. Malbrán"; Argentina Fil: Llarrull, Leticia Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; Argentina Fil: Mollerach, Marta Eugenia. Instituto de Investigaciones En Bacteriologia y Virologia Molecular (ibavim) ; Facultad de Farmacia y Bioquimica ; Universidad de Buenos Aires; . Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
description |
The mec-independent oxacillin non-susceptible S. aureus (MIONSA) strains represent a great clinical challenge, as they are not easily detected and can lead to treatment failure. However, the responsible molecular mechanisms are still very little understood. Here, we studied four clinical ST8-MSSA-t024 isolates recovered during the course of antibiotic treatment from a patient suffering successive ep-isodes of bacteremia. The first isolates (SAMS1, SAMS2, and SAMS3) were susceptible to cefoxitin and oxacillin. The last one (SA2) was susceptible to cefoxitin, resistant to oxacillin, lacked mecA/mecC genes, and had reduced susceptibility to teicoplanin. SA2 showed higher b-lactamase activity than SAMS1. However, b-lactamase hyperproduction could not be linked to oxacillin resistance as it was not inhibited by clavulanic acid, and no genetic changes that could account for its hyperproduction were found. Importantly, we hereby report the in vivo acquisition and coexistence of different adaptive mutations in genes associated with peptidoglycan synthesis (pbp2, rodA, stp1, yjbH, and yvqF/vraT), which is possibly related with the development of oxacillin resistance and reduced susceptibility to teicoplanin in SA2. Using three-dimensional models and PBP binding assays, we demonstrated the high contribution of the SA2 PBP2 Ala450Asp mutation to the observed oxacillin resistance phenotype. Our results should be considered as a warning for physicians and microbi-ologists in the region, as MIONSA detection and treatment represent an important clinical challenge. |
publishDate |
2024 |
dc.date.none.fl_str_mv |
2024-06 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/265764 Di Gregorio, Sabrina Noelia; Weltman, Gabriela; Fabbri, Carolina; Fernández, Silvina; Zárate, Soledad ; et al.; Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia; MDPI; Antibiotics; 13; 6; 6-2024; 554-571 2079-6382 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/265764 |
identifier_str_mv |
Di Gregorio, Sabrina Noelia; Weltman, Gabriela; Fabbri, Carolina; Fernández, Silvina; Zárate, Soledad ; et al.; Genetic and Phenotypic Changes Related to the Development of mec-Independent Oxacillin Non-Susceptibility in ST8 Staphylococcus aureus Recovered after Antibiotic Therapy in a Patient with Bacteremia; MDPI; Antibiotics; 13; 6; 6-2024; 554-571 2079-6382 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.3390/antibiotics13060554 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844614208373653504 |
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13.070432 |