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Ndugire W, Truong D, Hasitha Raviranga NG, Lao J, Ramström O, Yan M. Turning on the Antimicrobial Activity of Gold Nanoclusters Against Multidrug-Resistant Bacteria. Angew Chem Int Ed Engl 2023; 62:e202214086. [PMID: 36642692 PMCID: PMC10356176 DOI: 10.1002/anie.202214086] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 01/05/2023] [Accepted: 01/12/2023] [Indexed: 01/17/2023]
Abstract
In this work, we show that the addition of thiourea (TU) initiated broad-spectrum antimicrobial activity of otherwise inactive D-maltose-capped gold nanoclusters (AuNC-Mal). For example, AuNC-Mal/TU was effective against multidrug-resistant Pseudomonas aeruginosa with a minimum inhibitory concentration (MIC) of 1 μg mL-1 (2.5 μM [Au]) while having 30-60 times lower in vitro cytotoxicity against mammalian cells. The reaction of AuNC-Mal and TU generated the antimicrobial species of [Au(TU)2 ]+ and smaller AuNCs. TU increased the accumulation of Au in bacteria and helped maintain the oxidation state as AuI (vs. AuIII ). The modes of action included the inhibition of thioredoxin reductase, interference with the CuI regulation and depletion of ATP. Moreover, the antimicrobial activity did not change in the presence of colistin or carbonyl cyanide 3-chlorophenylhydrazone, suggesting that AuNC-Mal/TU was indifferent to the outer membrane barrier and to bacterial efflux pumps.
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Affiliation(s)
- William Ndugire
- Department of Chemistry, University of Massachusetts Lowell, One University Ave., Lowell, MA-01854, USA
| | - Dang Truong
- Department of Chemistry, University of Massachusetts Lowell, One University Ave., Lowell, MA-01854, USA
| | - N G Hasitha Raviranga
- Department of Chemistry, University of Massachusetts Lowell, One University Ave., Lowell, MA-01854, USA
| | - Jingzhe Lao
- Department of Chemistry, University of Massachusetts Lowell, One University Ave., Lowell, MA-01854, USA
| | - Olof Ramström
- Department of Chemistry, University of Massachusetts Lowell, One University Ave., Lowell, MA-01854, USA
- Department of Chemistry and Biomedical Sciences, Linnaeus University, 39182, Kalmar, Sweden
| | - Mingdi Yan
- Department of Chemistry, University of Massachusetts Lowell, One University Ave., Lowell, MA-01854, USA
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2
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Liu W, Miao L, Li X, Xu Z. Development of fluorescent probes targeting the cell wall of pathogenic bacteria. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213646] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Long J, Parker HE, Ehrlich K, Tanner MG, Dhaliwal K, Mills B. Frugal filtering optical lenses for point-of-care diagnostics. BIOMEDICAL OPTICS EXPRESS 2020; 11:1864-1875. [PMID: 32341853 PMCID: PMC7173883 DOI: 10.1364/boe.381014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/13/2020] [Accepted: 02/17/2020] [Indexed: 05/11/2023]
Abstract
Infectious diseases are the leading cause of morbidity and mortality in low and middle income countries (LMICs). Rapid diagnosis of infections in LMICs presents many challenges, especially in rural areas where access to health care, including diagnostics, is poor. Microscopy is one of the most commonly used platforms to diagnose bacterial infections on clinical samples. Fluorescence microscopy has high sensitivity and specificity but to date is mostly performed within a laboratory setting due to the high-cost, low portability and highly specialist nature of equipment. Point-of-care diagnostics could offer a solution to the challenge of infection diagnosis in LMICs. In this paper we present frugal, easy to manufacture, doped polydimethylsiloxane filtering optical lenses that can be integrated into smartphone microscopes for immediate detection of fluorescently labelled bacteria. This provides a breakthrough technology platform for point-of-care diagnostics.
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Affiliation(s)
- Joanna Long
- EPSRC Proteus IRC Hub in Optical Molecular Sensing and Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Helen E. Parker
- EPSRC Proteus IRC Hub in Optical Molecular Sensing and Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
- Department of Applied Physics, Royal Institute of Technology, Stockholm, Sweden
| | - Katjana Ehrlich
- EPSRC Proteus IRC Hub in Optical Molecular Sensing and Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Michael G. Tanner
- EPSRC Proteus IRC Hub in Optical Molecular Sensing and Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
- Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Science (IPAQS), Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Kevin Dhaliwal
- EPSRC Proteus IRC Hub in Optical Molecular Sensing and Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Bethany Mills
- EPSRC Proteus IRC Hub in Optical Molecular Sensing and Imaging, Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
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Gubala V, Giovannini G, Kunc F, Monopoli MP, Moore CJ. Dye-doped silica nanoparticles: synthesis, surface chemistry and bioapplications. Cancer Nanotechnol 2020. [DOI: 10.1186/s12645-019-0056-x] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Abstract
Background
Fluorescent silica nanoparticles have been extensively utilised in a broad range of biological applications and are facilitated by their predictable, well-understood, flexible chemistry and apparent biocompatibility. The ability to couple various siloxane precursors with fluorescent dyes and to be subsequently incorporated into silica nanoparticles has made it possible to engineer these fluorophores-doped nanomaterials to specific optical requirements in biological experimentation. Consequently, this class of nanomaterial has been used in applications across immunodiagnostics, drug delivery and human-trial bioimaging in cancer research.
Main body
This review summarises the state-of-the-art of the use of dye-doped silica nanoparticles in bioapplications and firstly accounts for the common nanoparticle synthesis methods, surface modification approaches and different bioconjugation strategies employed to generate biomolecule-coated nanoparticles. The use of dye-doped silica nanoparticles in immunoassays/biosensing, bioimaging and drug delivery is then provided and possible future directions in the field are highlighted. Other non-cancer-related applications involving silica nanoparticles are also briefly discussed. Importantly, the impact of how the protein corona has changed our understanding of NP interactions with biological systems is described, as well as demonstrations of its capacity to be favourably manipulated.
Conclusions
Dye-doped silica nanoparticles have found success in the immunodiagnostics domain and have also shown promise as bioimaging agents in human clinical trials. Their use in cancer delivery has been restricted to murine models, as has been the case for the vast majority of nanomaterials intended for cancer therapy. This is hampered by the need for more human-like disease models and the lack of standardisation towards assessing nanoparticle toxicity. However, developments in the manipulation of the protein corona have improved the understanding of fundamental bio–nano interactions, and will undoubtedly assist in the translation of silica nanoparticles for disease treatment to the clinic.
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Kirla H, Hughes L, Henry DJ. Carbohydrate coated fluorescent mesoporous silica particles for bacterial imaging. Colloids Surf B Biointerfaces 2020; 188:110751. [PMID: 31901686 DOI: 10.1016/j.colsurfb.2019.110751] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 12/15/2022]
Abstract
This work investigated the synthesis of carbohydrate functionalized methylene blue doped amine grafted mesoporous silica nanoparticles (MB AMSN) and their application in bioimaging. A single-pot synthesis methodology was developed via a modified co-condensation sol-gel technique for simultaneous incorporation of the dye molecule in the nanoparticles, with amine grafting for subsequent functionalization. The obtained nanoparticles (∼ 450 nm) are mesoporous and have a high surface area (538 m2/g), pore-volume (0.3 cm3/g), showed excellent UV-vis absorbance, and dye encapsulation efficiency (> 75 %). These fluorescent nanoparticles were further functionalized with carbohydrate molecules before application as contrast agents in bacterial cells. In the present study, gram-positive (E. coli) and gram-negative (B. subtilis) bacteria were used as model organisms. Confocal laser microscopy results showed that the nanoparticles are highly fluorescent, and SEM of glucose conjugated MB doped nanoparticles indicated close interaction with E. coli with no toxicity observed towards either bacterial cells. The results demonstrate that by suitable surface functionalization, the methylene blue doped silica nanoparticles can be used as bioimaging agents.
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Affiliation(s)
- Haritha Kirla
- Chemistry and Physics, College of Science, Health, Engineering and Education, Murdoch University, WA 6150, Australia
| | - Leonie Hughes
- Chemistry and Physics, College of Science, Health, Engineering and Education, Murdoch University, WA 6150, Australia
| | - David J Henry
- Chemistry and Physics, College of Science, Health, Engineering and Education, Murdoch University, WA 6150, Australia.
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Huang L, Yang S, Chen J, Tian J, Huang Q, Huang H, Wen Y, Deng F, Zhang X, Wei Y. A facile surface modification strategy for fabrication of fluorescent silica nanoparticles with the aggregation-induced emission dye through surface-initiated cationic ring opening polymerization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 94:270-278. [PMID: 30423709 DOI: 10.1016/j.msec.2018.09.042] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 08/21/2018] [Accepted: 09/14/2018] [Indexed: 12/16/2022]
Abstract
Fluorescent silica nanoparticles (FSNPs) have attracted great interest for potential applications in biological and biomedical fields because they possess higher fluorescence quantum yield and better fluorescence stability as comparison with small organic fluorescent molecules. The encapsulation of covalent linkage with fluorescent organic dyes or fluorescent metal complexes has demonstrated to be the commonly adopted strategies for fabrication of FSNPs previously. However, it is still challengeable to obtain FSNPs based polymer composites with intensive fluorescence and good water dispersibility through a one-pot surface modification strategy. In this paper, we developed a facile method to fabricate novel FSNPs based polymer composites (PhE@MSNs-PEtOx) through introducing the aggregation-induced emission (AIE) dye (PhE-OH) and poly(2-ethyl-2-oxazoline) (PEtOx) onto mesoporous silica nanoparticles (MSNs) based on cationic ring opening polymerization (CROP). The resulting PhE@MSNs-PEtOx composites possess strong fluorescence emission, excellent hydrophilicity and biocompatibility. These features make the final FSNPs based polymer composites great potential for biomedical applications. Taken together, we have developed for the first time that FSNPs based polymer composites can be facilely prepared through the one-pot introduction of AIE dyes and hydrophilic PEtOx on MSNs. Moreover, the novel FSNPs based composites could also be utilized for other biomedical applications considered their properties.
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Affiliation(s)
- Long Huang
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Saijiao Yang
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Junyu Chen
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Jianwen Tian
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Qiang Huang
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Hongye Huang
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Yuanqing Wen
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China
| | - Fengjie Deng
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China.
| | - Xiaoyong Zhang
- Department of Chemistry, Nanchang University, Nanchang 330031, PR China.
| | - Yen Wei
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing 100084, PR China; Department of Chemistry and Center for Nanotechnology, Chung-Yuan Christian University, Chung-Li 32023, Taiwan.
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Sundhoro M, Park J, Wu B, Yan M. Synthesis of Polyphosphazenes by a Fast Perfluoroaryl Azide-Mediated Staudinger Reaction. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00618] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Madanodaya Sundhoro
- University of
Massachusetts Lowell, 1 University Ave., Lowell, Massachusetts 01854, United States
| | - Jaehyeung Park
- University of
Massachusetts Lowell, 1 University Ave., Lowell, Massachusetts 01854, United States
- Division of Advanced Materials Engineering, Dong-Eui University, Busan 47340, Korea
| | - Bin Wu
- University of
Massachusetts Lowell, 1 University Ave., Lowell, Massachusetts 01854, United States
| | - Mingdi Yan
- University of
Massachusetts Lowell, 1 University Ave., Lowell, Massachusetts 01854, United States
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Taniguchi H, Busche T, Patschkowski T, Niehaus K, Pátek M, Kalinowski J, Wendisch VF. Physiological roles of sigma factor SigD in Corynebacterium glutamicum. BMC Microbiol 2017; 17:158. [PMID: 28701150 PMCID: PMC5508688 DOI: 10.1186/s12866-017-1067-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 07/04/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Sigma factors are one of the components of RNA polymerase holoenzymes, and an essential factor of transcription initiation in bacteria. Corynebacterium glutamicum possesses seven genes coding for sigma factors, most of which have been studied to some detail; however, the role of SigD in transcriptional regulation in C. glutamicum has been mostly unknown. RESULTS In this work, pleiotropic effects of sigD overexpression at the level of phenotype, transcripts, proteins and metabolites were investigated. Overexpression of sigD decreased the growth rate of C. glutamicum cultures, and induced several physiological effects such as reduced culture foaming, turbid supernatant and cell aggregation. Upon overexpression of sigD, the level of Cmt1 (corynomycolyl transferase) in the supernatant was notably enhanced, and carbohydrate-containing compounds were excreted to the supernatant. The real-time PCR analysis revealed that sigD overexpression increased the expression of genes related to corynomycolic acid synthesis (fadD2, pks), genes encoding corynomycolyl transferases (cop1, cmt1, cmt2, cmt3), L, D-transpeptidase (lppS), a subunit of the major cell wall channel (porH), and the envelope lipid regulation factor (elrF). Furthermore, overexpression of sigD resulted in trehalose dicorynomycolate accumulation in the cell envelope. CONCLUSIONS This study demonstrated that SigD regulates the synthesis of corynomycolate and related compounds, and expanded the knowledge of regulatory functions of sigma factors in C. glutamicum.
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Affiliation(s)
- Hironori Taniguchi
- Genetics of Prokaryotes, Faculty of Biology, Bielefeld University, Bielefeld, Germany
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Tobias Busche
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Thomas Patschkowski
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
- Proteome and Metabolome Research, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Karsten Niehaus
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
- Proteome and Metabolome Research, Faculty of Biology, Bielefeld University, Bielefeld, Germany
| | - Miroslav Pátek
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Jörn Kalinowski
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany
| | - Volker F Wendisch
- Genetics of Prokaryotes, Faculty of Biology, Bielefeld University, Bielefeld, Germany.
- Center for Biotechnology, Bielefeld University, Bielefeld, Germany.
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Kong N, Xie S, Zhou J, Menéndez M, Solís D, Park J, Proietti G, Ramström O, Yan M. Catalyst-Free Cycloaddition Reaction for the Synthesis of Glyconanoparticles. ACS APPLIED MATERIALS & INTERFACES 2016; 8:28136-28142. [PMID: 27649792 DOI: 10.1021/acsami.6b07471] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A new conjugation method for the immobilization of carbohydrates on nanomaterials was demonstrated simply by mixing perfluorophenyl azide-functionalized silica nanoparticles (SNPs), an amine-derivatized carbohydrate, and phenylacetaldehyde under ambient conditions without any catalyst. The density of carbohydrates on the glyconanoparticles was determined using the quantitative 19F NMR (19F qNMR) technique; for example, the density of d-mannose (Man) on Man-SNPs was 2.5 ± 0.2 × 10-16 nmol/nm2. The glyconanoparticles retained their binding affinity and selectivity toward cognate lectins. The apparent dissociation constant of the glyconanoparticles was measured by a fluorescence competition assay, where the binding affinity of Man-SNPs was almost 4 orders of magnitude higher than that of Man with concanavalin A. Moreover, even with a ligand density of 2.6 times lower than Man-SNPs synthesized by the copper-catalyzed azide-alkyne cycloaddition, the binding affinity of Man-SNPs prepared by the current method was more than 4 times higher.
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Affiliation(s)
- Na Kong
- Department of Chemistry, KTH-Royal Institute of Technology , Teknikringen 30, S-10044 Stockholm, Sweden
| | - Sheng Xie
- Department of Chemistry, KTH-Royal Institute of Technology , Teknikringen 30, S-10044 Stockholm, Sweden
| | - Juan Zhou
- Department of Chemistry, KTH-Royal Institute of Technology , Teknikringen 30, S-10044 Stockholm, Sweden
| | - Margarita Menéndez
- Instituto de Química Física Rocasolano , Consejo Superior de Investigaciones Científicas, and Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), ISCIII, Madrid, Spain
| | - Dolores Solís
- Instituto de Química Física Rocasolano , Consejo Superior de Investigaciones Científicas, and Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), ISCIII, Madrid, Spain
| | - JaeHyeung Park
- Department of Chemistry, University of Massachusetts Lowell , 1 University Avenue, Lowell, Massachusetts 01854, United States
| | - Giampiero Proietti
- Department of Chemistry, KTH-Royal Institute of Technology , Teknikringen 30, S-10044 Stockholm, Sweden
| | - Olof Ramström
- Department of Chemistry, KTH-Royal Institute of Technology , Teknikringen 30, S-10044 Stockholm, Sweden
| | - Mingdi Yan
- Department of Chemistry, KTH-Royal Institute of Technology , Teknikringen 30, S-10044 Stockholm, Sweden
- Department of Chemistry, University of Massachusetts Lowell , 1 University Avenue, Lowell, Massachusetts 01854, United States
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Abstract
Bacterial infections constitute an increasing problem to human health in response to build-up of resistance to present antibiotics and sluggish development of new pharmaceuticals. However, a means to address this problem is to pinpoint the drug delivery to-and into-the bacteria. This results in a high local concentration of the drug, circumventing the increasingly high doses otherwise necessary. Combined with other effectors, such as covalent attachment to carriers, rendering the drugs less degradable, and the combination with efflux inhibitors, old drugs can be revived. In this context, glyconanomaterials offer exceptional potential, since these materials can be tailored to accommodate different effectors. In this Concept article, we describe the different advantages of glyconanomaterials, and point to their potential in antibiotic "revitalization".
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Affiliation(s)
- Olof Ramström
- Department of Chemistry, KTH - Royal Institute of Technology, Stockholm (Sweden).
| | - Mingdi Yan
- Department of Chemistry, KTH - Royal Institute of Technology, Stockholm (Sweden).
- Department of Chemistry, University of Massachusetts Lowell, Lowell, MA (USA).
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