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Craft KM, Gaddy JA, Townsend SD. Human Milk Oligosaccharides (HMOs) Sensitize Group B Streptococcus to Clindamycin, Erythromycin, Gentamicin, and Minocycline on a Strain Specific Basis. ACS Chem Biol 2018; 13:2020-2026. [PMID: 30071726 DOI: 10.1021/acschembio.8b00661] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Human milk oligosaccharides (HMOs) possess antimicrobial and antibiofilm activity against Group B Streptococcus (GBS). HMOs were screened for their ability to potentiate antibiotic activity. We observed that HMOs potentiate the function of aminoglycosides, lincosamides, macrolides, and tetracyclines on a strain specific basis but not β-lactams or glycopeptides that inhibit cell wall synthesis. These findings are notable as GBS has evolved high levels of resistance toward aminoglycosides, macrolides, and tetracyclines. Finally, HMOs potentiate the function of aminoglycosides against both Staphylococcus aureus and Acinetobacter baumannii. On the basis of these observations, we hypothesized that HMOs act by increasing membrane permeability. This hypothesis was evaluated using a bacterial membrane permeability assay which revealed that HMOs increase membrane permeability toward propidium iodide.
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Affiliation(s)
- Kelly M. Craft
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, Nashville, Tennessee 37235, United States
| | - Jennifer A. Gaddy
- Department of Medicine, Vanderbilt University Medical Center, 1161 21st Avenue South, D-3100 Medical Center North, Nashville, Tennessee 37232, United States
- Tennessee Valley Healthcare Systems, Department of Veterans Affairs, 1310 24th Avenue South, Nashville, Tennessee 37212, United States
| | - Steven D. Townsend
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, Nashville, Tennessee 37235, United States
- Vanderbilt Institute of Chemical Biology, Vanderbilt University, 896 Preston Research Building, Nashville, Tennessee 37232, United States
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University, Medical Center North A-5302, 1161 21st Ave South, Nashville, Tennessee 37232, United States
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Del Rosso JQ, Webster GF, Rosen T, Thiboutot D, Leyden JJ, Gallo R, Walker C, Zhanel G, Eichenfield L. Status Report from the Scientific Panel on Antibiotic Use in Dermatology of the American Acne and Rosacea Society: Part 1: Antibiotic Prescribing Patterns, Sources of Antibiotic Exposure, Antibiotic Consumption and Emergence of Antibiotic Resistance, Impact of Alterations in Antibiotic Prescribing, and Clinical Sequelae of Antibiotic Use. THE JOURNAL OF CLINICAL AND AESTHETIC DERMATOLOGY 2016; 9:18-24. [PMID: 27462384 PMCID: PMC4898580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Oral and topical antibiotics are commonly prescribed in dermatologie practice, often for noninfectious disorders, such as acne vulgaris and rosacea. Concerns related to antibiotic exposure from both medical and nonmedical sources require that clinicians consider in each case why and how antibiotics are being used and to make appropriate adjustments to limit antibiotic exposure whenever possible. This first article of a three-part series discusses prescribing patterns in dermatology, provides an overview of sources of antibiotic exposure, reviews the relative correlations between the magnitude of antibiotic consumption and emergence of antibiotic resistance patterns, evaluates the impact of alterations in antibiotic prescribing, and discusses the potential relevance and clinical sequelae of antibiotic use, with emphasis on how antibiotics are used in dermatology.
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Affiliation(s)
| | - Guy F. Webster
- Department of Dermatology, Jefferson Medical College, Philadelphia, Pennsylvania
| | - Ted Rosen
- Department of Dermatology, Baylor College of Medicine, Houston, Texas
| | - Diane Thiboutot
- Department of Dermatology, Penn State University, Hershey, Pennsylvania
| | - James J. Leyden
- Department of Dermatology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Richard Gallo
- Department of Dermatology, University of California San Diego, San Diego, California
| | - Clay Walker
- University of Florida Dental School, Gainesville, Florida
| | - George Zhanel
- Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, Canada
| | - Lawrence Eichenfield
- Department of Dermatology (Pediatrics), University of California San Diego, San Diego, California
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