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Stamo DF, Nagpal P, Chatterjee A. Light-activated quantum dot potentiation of antibiotics to treat drug-resistant bacterial biofilms. NANOSCALE ADVANCES 2021; 3:2782-2786. [PMID: 36134178 PMCID: PMC9419411 DOI: 10.1039/d1na00056j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/10/2021] [Indexed: 05/10/2023]
Abstract
CdTe-2.4 eV quantum dots (QDs) show excellent efficacy due to their tunability and photo-potentiation for sterilizing drug-resistant planktonic cultures without harming mammalian cells but this QD fabrication has not been tested against biofilms. While the QD attack mechanism-production of superoxide radicals-is known to stimulate biofilm formation, here we demonstrate that CdTe-2.4 eV QD-antibiotic combination therapy can nearly eradicate Escherichia coli, methicillin-resistant Staphylococcus aureus, and Pseudomonas aeruginosa biofilms. CdTe-2.4 eV QD versatility, safety, and ability to potentiate antibiotics makes them a potential treatment strategy for biofilm-associated infections.
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Affiliation(s)
- Dana F Stamo
- Chemical and Biological Engineering, University of Colorado Boulder Boulder CO 80303 USA
| | - Prashant Nagpal
- Antimicrobial Regeneration Consortium Boulder CO 80301 USA
- Sachi Bioworks, Inc. Boulder CO 80301 USA
- Quantum Biology, Inc. Boulder CO 80301 USA
| | - Anushree Chatterjee
- Chemical and Biological Engineering, University of Colorado Boulder Boulder CO 80303 USA
- Sachi Bioworks, Inc. Boulder CO 80301 USA
- Quantum Biology, Inc. Boulder CO 80301 USA
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2
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Gunjal VB, Thakare R, Chopra S, Reddy DS. Teixobactin: A Paving Stone toward a New Class of Antibiotics? J Med Chem 2020; 63:12171-12195. [PMID: 32520557 DOI: 10.1021/acs.jmedchem.0c00173] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Antimicrobial resistance is a serious threat to human health worldwide, prompting research efforts on a massive scale in search of novel antibiotics to fill an urgent need for a remedy. Teixobactin, a macrocyclic depsipeptide natural product, isolated from uncultured bacteria (Eleftheria terrae), displayed potent activity against several Gram-positive pathogenic bacteria. The distinct pharmacological profile and interesting structural features of teixobactin with nonstandard amino acid (three d-amino acids and l-allo-enduracididine) residues attracted several research groups to work on this target molecule in search of novel antibiotics with new mechanism. Herein, we present a comprehensive and critical perspective on immense possibilities offered by teixobactin in the domain of drug discovery. Efforts made by various research groups since its isolation are discussed, highlighting the molecule's considerable potential with special emphasis on replacement of amino acids. Critical analysis of synthetic efforts, SAR studies, and the way forward are provided hereunder.
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Affiliation(s)
- Vidya B Gunjal
- CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ritesh Thakare
- CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow 226031, Uttar Pradesh, India
| | - Sidharth Chopra
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.,CSIR-Central Drug Research Institute, Sector 10, Janakipuram Extension, Sitapur Road, Lucknow 226031, Uttar Pradesh, India
| | - D Srinivasa Reddy
- CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Guo C, Mandalapu D, Ji X, Gao J, Zhang Q. Chemistry and Biology of Teixobactin. Chemistry 2017; 24:5406-5422. [PMID: 28991382 DOI: 10.1002/chem.201704167] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Indexed: 11/06/2022]
Abstract
Bacterial resistance to existing drugs is becoming a serious public health issue, urging extensive search for new antibiotics. Teixobactin, a cyclic depsipeptide discovered in a screen of uncultured bacteria, shows potent activity against all the tested Gram-positive bacteria. Remarkably, no teixobactin-resistant bacterial strain has been obtained despite extensive efforts, highlighting the great potential of teixobactin as a lead compound in the fight against antimicrobial resistance (AMR). This review summarizes recent progresses in the understanding of many aspects of teixobactin, including chemical structure, biological activity, biosynthetic pathway, and mode of action. We also discuss the different synthetic strategies in producing teixobactin and its analogues, and the structure-activity relationship (SAR) studies.
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Affiliation(s)
- Chuchu Guo
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | | | - Xinjian Ji
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
| | - Jiangtao Gao
- College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002, P. R. China
| | - Qi Zhang
- Department of Chemistry, Fudan University, Shanghai, 200433, P. R. China
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Dhara S, Gunjal VB, Handore KL, Srinivasa Reddy D. Solution-Phase Synthesis of the Macrocyclic Core of Teixobactin. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600778] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Santu Dhara
- Division of Organic Chemistry; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road 411008 Pune India
| | - Vidya B. Gunjal
- Division of Organic Chemistry; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road 411008 Pune India
- Academy of Scientific and Innovative Research (AcSIR); 110025 New Delhi India
| | - Kishor L. Handore
- Division of Organic Chemistry; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road 411008 Pune India
- Academy of Scientific and Innovative Research (AcSIR); 110025 New Delhi India
| | - D. Srinivasa Reddy
- Division of Organic Chemistry; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road 411008 Pune India
- Academy of Scientific and Innovative Research (AcSIR); 110025 New Delhi India
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Guillard T, Pons S, Roux D, Pier GB, Skurnik D. Antibiotic resistance and virulence: Understanding the link and its consequences for prophylaxis and therapy. Bioessays 2016; 38:682-93. [PMID: 27248008 DOI: 10.1002/bies.201500180] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
"Antibiotic resistance is usually associated with a fitness cost" is frequently accepted as common knowledge in the field of infectious diseases. However, with the advances in high-throughput DNA sequencing that allows for a comprehensive analysis of bacterial pathogenesis at the genome scale, including antibiotic resistance genes, it appears that this paradigm might not be as solid as previously thought. Recent studies indicate that antibiotic resistance is able to enhance bacterial fitness in vivo with a concomitant increase in virulence during infections. As a consequence, strategies to minimize antibiotic resistance turn out to be not as simple as initially believed. Indeed, decreased antibiotic use may not be sufficient to let susceptible strains outcompete the resistant ones. Here, we put in perspective these findings and review alternative approaches, such as preventive and therapeutic anti-bacterial immunotherapies that have the potential to by-pass the classic antibiotics.
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Affiliation(s)
- Thomas Guillard
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Laboratoire de Bactériologie-Virologie-Hygiène hospitalière, Hôpital Robert Debré - CHU de Reims, UFR de Médecine, Université de Reims Champagne-Ardenne, Reims, France
| | - Stéphanie Pons
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Damien Roux
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,INSERM, IAME, UMR 1137, Paris, France.,Univ Paris Diderot, IAME, UMR 1137, Sorbonne Paris Cité, Paris, France.,AP-HP, Hôpital Louis Mourier, Service de Réanimation Médico-Chirurgicale, Colombes, France
| | - Gerald B Pier
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - David Skurnik
- Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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Abstract
The practice of medicine was profoundly transformed by the introduction of the antibiotics (compounds isolated from Nature) and the antibacterials (compounds prepared by synthesis) for the control of bacterial infection. As a result of the extraordinary success of these compounds over decades of time, a timeless biological activity for these compounds has been presumed. This presumption is no longer. The inexorable acquisition of resistance mechanisms by bacteria is retransforming medical practice. Credible answers to this dilemma are far better recognized than they are being implemented. In this perspective we examine (and in key respects, reiterate) the chemical and biological strategies being used to address the challenge of bacterial resistance.
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Affiliation(s)
- Jed F. Fisher
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame IN 46556–5670, USA
| | - Shahriar Mobashery
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame IN 46556–5670, USA
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References. Antibiotics (Basel) 2015. [DOI: 10.1128/9781555819316.refs] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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