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StAP1 phage: an effective tool for treating methicillin-resistant Staphylococcus aureus infections

INTRODUCTION: Staphylococcus aureus infection has long been a serious concern in the medical field, with methicillin-resistant Staphylococcus aureus (MRSA) posing a considerable challenge to public health. Given the escalating bacterial resistance and the favorable biosafety and environmental proper...

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Detalles Bibliográficos
Autores principales: Lu, Yuwen, Lu, Yifei, Li, Baobao, Liu, Jiazhen, Wang, Lixin, Zhang, Lianyang, Li, Yang, Zhong, Qiu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10570516/
https://www.ncbi.nlm.nih.gov/pubmed/37840707
http://dx.doi.org/10.3389/fmicb.2023.1267786
Descripción
Sumario:INTRODUCTION: Staphylococcus aureus infection has long been a serious concern in the medical field, with methicillin-resistant Staphylococcus aureus (MRSA) posing a considerable challenge to public health. Given the escalating bacterial resistance and the favorable biosafety and environmental properties of phages, the resurgence of phage therapy offers a promising alternative to antibiotics. METHODS: In this study, we isolated and characterized a MRSA phage named StAP1 from a Chinese hospital. Phenotypic and molecular analyses revealed its broad-spectrum characteristics, genomic background, and potential application in MRSA infection treatment. RESULTS: Morphological examination classified the phage as a member of the Herelleviridae phage family, displaying a typical hexagonal head and a slender fibrous tail. Genomic analysis unveiled a size of ~144,705 bp for the StAP1 genome, encompassing 215 open reading frames (ORFs). The one-step growth curve demonstrated a 20-min incubation period for the phage, with an optimal multiplicity of infection (MOI) of 0.1. Moreover, StAP1 exhibited stability across a wide range of temperatures and pH levels. Further investigation of its broad-spectrum characteristics confirmed its ability to effectively infect all staphylococcal cassette chromosomal mec (SCCmec) types found in MRSA strains, notably displaying a remarkable lysis rate of 76.7% against the prevalent ST239 strain in China. In vivo studies show cased significant efficacy of the StAP1 phage against MRSA infection. DISCUSSION: Overall, StAP1 phage presents a broad infection spectrum and exhibits strong lytic effects on various MRSA strains, highlighting its tremendous potential as a powerful tool for MRSA infection treatment.