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Nguyen VT, Birhanu BT, Miguel-Ruano V, Kim C, Batuecas M, Yang J, El-Araby AM, Jiménez-Faraco E, Schroeder VA, Alba A, Rana N, Sader S, Thomas CA, Feltzer R, Lee M, Fisher JF, Hermoso JA, Chang M, Mobashery S. Restoring susceptibility to β-lactam antibiotics in methicillin-resistant Staphylococcus aureus. Nat Chem Biol 2024:10.1038/s41589-024-01688-0. [PMID: 39060390 DOI: 10.1038/s41589-024-01688-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 06/26/2024] [Indexed: 07/28/2024]
Abstract
Infections by Staphylococcus aureus have been treated historically with β-lactam antibiotics. However, these antibiotics have become obsolete in methicillin-resistant S. aureus by acquisition of the bla and mec operons. The presence of the β-lactam antibiotic is detected by the sensor domains of BlaR and/or MecR, and the information is transmitted to the cytoplasm, resulting in derepression of the antibiotic-resistance genes. We hypothesized that inhibition of the sensor domain would shut down this response system, and β-lactam susceptibility would be restored. An in silico search of 11 million compounds led to a benzimidazole-based hit and, ultimately, to the boronate 4. The X-ray structure of 4 is covalently engaged with the active-site serine of BlaR. Compound 4 potentiates by 16- to 4,096-fold the activities of oxacillin and of meropenem against methicillin-resistant S. aureus strains. The combination of 4 with oxacillin or meropenem shows efficacy in infected mice, validating the strategy.
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Affiliation(s)
- Van T Nguyen
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Biruk T Birhanu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Vega Miguel-Ruano
- Department of Crystallography and Structural Biology, Instituto de Química-Física 'Blas Cabrera', Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Choon Kim
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Mayte Batuecas
- Department of Crystallography and Structural Biology, Instituto de Química-Física 'Blas Cabrera', Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Jingdong Yang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Amr M El-Araby
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Eva Jiménez-Faraco
- Department of Crystallography and Structural Biology, Instituto de Química-Física 'Blas Cabrera', Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Valerie A Schroeder
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Alejandra Alba
- Department of Crystallography and Structural Biology, Instituto de Química-Física 'Blas Cabrera', Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Neha Rana
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Safaa Sader
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Caitlyn A Thomas
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Rhona Feltzer
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Mijoon Lee
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Jed F Fisher
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Juan A Hermoso
- Department of Crystallography and Structural Biology, Instituto de Química-Física 'Blas Cabrera', Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Mayland Chang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA
| | - Shahriar Mobashery
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA.
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Gill J, Kumar R, Todd J, Wiskin C. Methicillin-resistant Staphylococcus aureus: awareness and perceptions. J Hosp Infect 2006; 62:333-7. [PMID: 16377028 DOI: 10.1016/j.jhin.2005.09.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2005] [Accepted: 09/06/2005] [Indexed: 10/25/2022]
Abstract
The purpose of this study was to investigate levels of awareness and the perceived risk of contracting methicillin-resistant Staphylococcus aureus (MRSA) amongst patients/visitors and employees of the UK National Health Service (NHS). Differences between the two cohorts were also investigated, particularly sources of information about MRSA. In March 2005, a piloted questionnaire was circulated to 50 patients/visitors and 100 NHS employees (25 doctors, 25 nurses, 25 domestics and 25 porters). No information was returned from porters, but the overall response rate was 67%. There was a high level of awareness of MRSA among both patients/visitors (94%) and NHS employees (100%). General media was the most common source of information for patients/visitors (68%) compared with 24% of NHS employees (P < 0.01). Perceived risk of contracting MRSA was very similar among patients/visitors and NHS employees (34% vs 35%, P > 0.10). Fifty-two percent of doctors felt that they were at risk compared with 13% of domestic employees. In conclusion, this study showed a high level of awareness among the general public and healthcare workers alike.
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Affiliation(s)
- J Gill
- Division of Primary Care, Public and Occupational Health, Primary Care Clinical Sciences Building, School of Medicine, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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