Neutralizing Alpha-Toxin Accelerates Healing of Staphylococcus aureus-Infected Wounds in Nondiabetic and Diabetic Mice.
Antimicrob Agents Chemother
; 62(3)2018 03.
Article
em En
| MEDLINE
| ID: mdl-29311091
ABSTRACT
Staphylococcus aureus wound infections delay healing and result in invasive complications such as osteomyelitis, especially in the setting of diabetic foot ulcers. In preclinical animal models of S. aureus skin infection, antibody neutralization of alpha-toxin (AT), an S. aureus-secreted pore-forming cytolytic toxin, reduces disease severity by inhibiting skin necrosis and restoring effective host immune responses. However, whether therapeutic neutralization of alpha-toxin is effective against S. aureus-infected wounds is unclear. Herein, the efficacy of prophylactic treatment with a human neutralizing anti-AT monoclonal antibody (MAb) was evaluated in an S. aureus skin wound infection model in nondiabetic and diabetic mice. In both nondiabetic and diabetic mice, anti-AT MAb treatment decreased wound size and bacterial burden and enhanced reepithelialization and wound resolution compared to control MAb treatment. Anti-AT MAb had distinctive effects on the host immune response, including decreased neutrophil and increased monocyte and macrophage infiltrates in nondiabetic mice and decreased neutrophil extracellular traps (NETs) in diabetic mice. Similar therapeutic efficacy was achieved with an active vaccine targeting AT. Taken together, neutralization of AT had a therapeutic effect against S. aureus-infected wounds in both nondiabetic and diabetic mice that was associated with differential effects on the host immune response.
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Texto completo:
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Bases de dados:
MEDLINE
Assunto principal:
Toxinas Bacterianas
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Cicatrização
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Ferimentos não Penetrantes
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Infecções Cutâneas Estafilocócicas
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Diabetes Mellitus Experimental
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Anticorpos Neutralizantes
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Proteínas Hemolisinas
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Anticorpos Monoclonais
Idioma:
En
Revista:
Antimicrob Agents Chemother
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Estados Unidos