PBP 4 Mediates High-Level Resistance to New-Generation Cephalosporins in Staphylococcus aureus

被引：32

作者：

Chan, Liana C. ^{[1
,3
]}

Gilbert, Aubre ^{[1
]}

Basuino, Li ^{[1
]}

da Costa, Thaina M. ^{[1
,2
]}

Hamilton, Stephanie M. ^{[1
]}

dos Santos, Katia R. ^{[2
]}

Chambers, Henry F. ^{[1
]}

Chatterjee, Som S. ^{[1
]}

机构：

[1] San Francisco Gen Hosp, Div Infect Dis, Dept Med, San Francisco, CA 94110 USA

[2] Univ Fed Rio de Janeiro, Inst Microbiol Paulo de Goes, Rio De Janeiro, Brazil

[3] Harbor UCLA Med Ctr, Div Mol Med, Torrance, CA 90509 USA

来源：

ANTIMICROBIAL AGENTS AND CHEMOTHERAPY | 2016年 / 60卷 / 07期

基金：

美国国家卫生研究院;

关键词：

PENICILLIN-BINDING PROTEINS; BETA-LACTAM RESISTANCE; METHICILLIN RESISTANCE; CEFTAROLINE; CEFTOBIPROLE; MUTATIONS; SUSCEPTIBILITY; INFECTIONS; VIRULENCE; GENE;

D O I：

10.1128/AAC.00358-16

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Staphylococcus aureus is an important cause of both hospital- and community-associated methicillin-resistant S. aureus (MRSA) infections worldwide. beta-Lactam antibiotics are the drugs of choice to treat S. aureus infections, but resistance to these and other antibiotics make treatment problematic. High-level beta-lactam resistance of S. aureus has always been attributed to the horizontally acquired penicillin binding protein 2a (PBP 2a) encoded by the mecA gene. Here, we show that S. aureus can also express high-level resistance to beta-lactams, including new-generation broad-spectrum cephalosporins that are active against methicillin-resistant strains, through an uncanonical core genome-encoded penicillin binding protein, PBP 4, a nonessential enzyme previously considered not to be important for staphylococcal beta-lactam resistance. Our results show that PBP 4 can mediate high-level resistance to beta-lactams.

引用

页码：3934 / 3941

页数：8

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