1
|
LuTheryn G, Ho EML, Choi V, Carugo D. Cationic Microbubbles for Non-Selective Binding of Cavitation Nuclei to Bacterial Biofilms. Pharmaceutics 2023; 15:pharmaceutics15051495. [PMID: 37242736 DOI: 10.3390/pharmaceutics15051495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/06/2023] [Accepted: 05/12/2023] [Indexed: 05/28/2023] Open
Abstract
The presence of multi-drug resistant biofilms in chronic, persistent infections is a major barrier to successful clinical outcomes of therapy. The production of an extracellular matrix is a characteristic of the biofilm phenotype, intrinsically linked to antimicrobial tolerance. The heterogeneity of the extracellular matrix makes it highly dynamic, with substantial differences in composition between biofilms, even in the same species. This variability poses a major challenge in targeting drug delivery systems to biofilms, as there are few elements both suitably conserved and widely expressed across multiple species. However, the presence of extracellular DNA within the extracellular matrix is ubiquitous across species, which alongside bacterial cell components, gives the biofilm its net negative charge. This research aims to develop a means of targeting biofilms to enhance drug delivery by developing a cationic gas-filled microbubble that non-selectively targets the negatively charged biofilm. Cationic and uncharged microbubbles loaded with different gases were formulated and tested to determine their stability, ability to bind to negatively charged artificial substrates, binding strength, and, subsequently, their ability to adhere to biofilms. It was shown that compared to their uncharged counterparts, cationic microbubbles facilitated a significant increase in the number of microbubbles that could both bind and sustain their interaction with biofilms. This work is the first to demonstrate the utility of charged microbubbles for the non-selective targeting of bacterial biofilms, which could be used to significantly enhance stimuli-mediated drug delivery to the bacterial biofilm.
Collapse
Affiliation(s)
- Gareth LuTheryn
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), The Botnar Research Centre, University of Oxford, Windmill Road, Oxford OX3 7HE, UK
- Faculty of Engineering and Physical Sciences, University of Southampton, University Road, Southampton SO17 1BJ, UK
| | - Elaine M L Ho
- Faculty of Engineering and Physical Sciences, University of Southampton, University Road, Southampton SO17 1BJ, UK
- Artificial Intelligence and Informatics, The Rosalind Franklin Institute, Harwell Campus, Didcot OX11 0QX, UK
| | - Victor Choi
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK
| | - Dario Carugo
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), The Botnar Research Centre, University of Oxford, Windmill Road, Oxford OX3 7HE, UK
| |
Collapse
|
2
|
Liu W, Huang L, Hu J, Xing X. Various Bond Interactions between NO and Anionic Gold Clusters: A Theoretical Calculation. Phys Chem Chem Phys 2022; 24:13641-13650. [DOI: 10.1039/d1cp05213f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We studied the electronic and geometrical structures of AunNO- (n = 1-20) using the B3LYP method with relatively large basis sets to understand the size dependent reactivities of Aun- with...
Collapse
|
3
|
Conder CJ, Jawale H, Wenthold PG. Mass spectrometry studies of nitrene anions. MASS SPECTROMETRY REVIEWS 2021:e21751. [PMID: 34842299 DOI: 10.1002/mas.21751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 11/03/2021] [Indexed: 06/13/2023]
Abstract
Nitrene anions are a class of reactive intermediates that provide a means for studying the corresponding neutral molecules via electron photodetachment spectroscopy and photoelectron spectroscopy. The added electron makes it possible for protected nitrene anions to be manipulated by external electric and magnetic fields of a mass spectrometer. Nitrene anions also display their own unique reactivities as reagents, which have been investigated using ion/molecule reactions. Mass spectrometry of negative ions has thereby provided information on the electronic states, reactivities, and thermochemical properties of nitrene intermediates. This review also includes a discussion of condensed-phase nitrene anions.
Collapse
Affiliation(s)
- Cory J Conder
- Department of Chemistry, Purdue University, West Lafayette, Indiana, USA
| | - Harshal Jawale
- Department of Chemistry, Purdue University, West Lafayette, Indiana, USA
| | - Paul G Wenthold
- Department of Chemistry, Purdue University, West Lafayette, Indiana, USA
| |
Collapse
|
4
|
Cederbaum LS. Ultrafast Intermolecular Energy Transfer from Vibrations to Electronic Motion. PHYSICAL REVIEW LETTERS 2018; 121:223001. [PMID: 30547622 DOI: 10.1103/physrevlett.121.223001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Indexed: 06/09/2023]
Abstract
It is discussed how vibrationally excited molecules in their electronic ground state can transfer their vibrational energy to the electronic motion of neighbors and ionize them. Based on explicit examples of vibrationally excited molecules and anionic neighbors, it is demonstrated that the transfer can be extremely efficient at intermolecular distances much beyond distances at which the molecule and its neighbor can form a bond.
Collapse
Affiliation(s)
- Lorenz S Cederbaum
- Theoretische Chemie, Physikalisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| |
Collapse
|
5
|
Hossain E, Deng SM, Gozem S, Krylov AI, Wang XB, Wenthold PG. Photoelectron Spectroscopy Study of Quinonimides. J Am Chem Soc 2017; 139:11138-11148. [DOI: 10.1021/jacs.7b05197] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Ekram Hossain
- The
Department of Chemistry Purdue University West Lafayette, Indiana 47906, United States
| | - Shihu M. Deng
- Physical
Sciences Division, Pacific Northwest National Laboratory P.O. Box 999, MS k8-88 Richland, Washington 99352, United States
| | - Samer Gozem
- Department
of Chemistry University of Southern California Los Angeles, 90089, United States
| | - Anna I. Krylov
- Department
of Chemistry University of Southern California Los Angeles, 90089, United States
| | - Xue-Bin Wang
- Physical
Sciences Division, Pacific Northwest National Laboratory P.O. Box 999, MS k8-88 Richland, Washington 99352, United States
| | - Paul G. Wenthold
- The
Department of Chemistry Purdue University West Lafayette, Indiana 47906, United States
| |
Collapse
|
6
|
Zhao YX, Liu QY, Zhang MQ, He SG. Reactions of metal cluster anions with inorganic and organic molecules in the gas phase. Dalton Trans 2016; 45:11471-95. [DOI: 10.1039/c6dt01246a] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Progress on the activation and transformation of important inorganic and organic molecules by negatively charged bare metal clusters as well as ligated systems with oxygen, carbon, and nitrogen, among others.
Collapse
Affiliation(s)
- Yan-Xia Zhao
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Qing-Yu Liu
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Mei-Qi Zhang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Sheng-Gui He
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| |
Collapse
|
7
|
Wright PA, Alex A, Pullen FS. Can computational chemistry be used to predict CID fragmentation of anions? RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2015; 29:2309-2315. [PMID: 26522325 DOI: 10.1002/rcm.7394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 09/10/2015] [Accepted: 09/10/2015] [Indexed: 06/05/2023]
Affiliation(s)
| | - Alexander Alex
- Evenor Consulting Ltd, The New Barn, Mill Lane, Eastry, UK
| | | |
Collapse
|
8
|
Oxidation of zeolite acid sites in NO/O2 mixtures and the catalytic properties of the new site in NO oxidation. J Catal 2015. [DOI: 10.1016/j.jcat.2015.02.009] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
9
|
van der Linde C, Höckendorf RF, Balaj OP, Beyer MK. Reactions of Hydrated Singly Charged First-Row Transition-Metal Ions M+(H2O)n(M=V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) toward Nitric Oxide in the Gas Phase. Chemistry 2013; 19:3741-50. [DOI: 10.1002/chem.201203459] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Indexed: 11/11/2022]
|
10
|
Rau NJ, Welles EA, Wenthold PG. Anionic Substituent Control of the Electronic Structure of Aromatic Nitrenes. J Am Chem Soc 2013; 135:683-90. [PMID: 23276248 DOI: 10.1021/ja306364z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nathan J. Rau
- The Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Emily A. Welles
- The Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| | - Paul G. Wenthold
- The Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084, United States
| |
Collapse
|
11
|
Gersch C, Palii SP, Kim KM, Angerhofer A, Johnson RJ, Henderson GN. Inactivation of nitric oxide by uric acid. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2008; 27:967-78. [PMID: 18696365 DOI: 10.1080/15257770802257952] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The 1980 identification of nitric oxide (NO) as an endothelial cell-derived relaxing factor resulted in an unprecedented biomedical research of NO and established NO as one of the most important cardiovascular, nervous and immune system regulatory molecule. A reduction in endothelial cell NO levels leading to "endothelial dysfunction" has been identified as a key pathogenic event preceding the development of hypertension, metabolic syndrome, and cardiovascular disease. The reduction in endothelial NO in cardiovascular disease has been attributed to the action of oxidants that either directly react with NO or uncouple its substrate enzyme. In this report, we demonstrate that uric acid (UA), the most abundant antioxidant in plasma, reacts directly with NO in a rapid irreversible reaction resulting in the formation of 6-aminouracil and depletion of NO. We further show that this reaction occurs preferentially with NO even in the presence of oxidants peroxynitrite and hydrogen peroxide and that the reaction is at least partially blocked by glutathione. This study shows a potential mechanism by which UA may deplete NO and cause endothelial dysfunction, particularly under conditions of oxidative stress in which UA is elevated and intracellular glutathione is depleted.
Collapse
Affiliation(s)
- Christine Gersch
- Department of Medicine, Division of Nephrology and Hypertension, University of Florida, Gainesville, Florida 32610, USA
| | | | | | | | | | | |
Collapse
|
12
|
Wijeratne NR, Wenthold PG. Structure and Reactivity of Benzoylnitrene Radical Anion in the Gas Phase. J Org Chem 2007; 72:9518-22. [PMID: 18001090 DOI: 10.1021/jo701407n] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Neloni R. Wijeratne
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084
| | - Paul G. Wenthold
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-2084
| |
Collapse
|
13
|
|
14
|
Velarde L, Habteyes T, Grumbling ER, Pichugin K, Sanov A. Solvent resonance effect on the anisotropy of NO−(N2O)n cluster anion photodetachment. J Chem Phys 2007; 127:084302. [PMID: 17764243 DOI: 10.1063/1.2766948] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photodetachment from NO(-)(N(2)O)(n) cluster anions (n< or =7) is investigated using photoelectron imaging at 786, 532, and 355 nm. Compared to unsolvated NO(-), the photoelectron anisotropy with respect to the laser polarization direction diminishes drastically in the presence of the N(2)O solvent, especially in the 355 nm data. In contrast, a less significant anisotropy loss is observed for NO(-)(H(2)O)(n). The effect is attributed to photoelectron scattering on the solvent, which in the N(2)O case is mediated by the (2)Pi anionic resonance. No anionic resonances exist for H(2)O in the applicable photoelectron energy range, in line with the observed difference between the photoelectron images obtained with the two solvents. The momentum-transfer cross section, rather than the total scattering cross section, is argued to be an appropriate physical parameter predicting the solvent effects on the photoelectron angular distributions in these cluster anions.
Collapse
Affiliation(s)
- Luis Velarde
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721-0041, USA
| | | | | | | | | |
Collapse
|
15
|
Chacko SA, Wenthold PG. Studies of the electron-promoted cope cyclization of 2,5-phenyl-substituted 1,5-hexadiene radical anions. J Org Chem 2007; 72:494-501. [PMID: 17221966 DOI: 10.1021/jo0618775] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This work describes studies of the electron-promoted Cope cyclization of 2,5-phenyl-1,5-hexadiene radical anions in a flowing afterglow triple quadrupole mass spectrometer. The electronic properties of the hexadienes have been systematically modified by using aromatic substituents at the 2- and 5-positions of the hexedienes, including those with nitro, trifluoromethyl, fluoro, chloro, and acetyl groups. Ions were formed by the thermal attachment of electrons in the gas phase. Structures of the molecular radical anions were probed to determine whether they undergo cyclization to a cyclohexane-1,4-diyl anion structure by examining chemical reactivity with neutral reagents including carbon dioxide, carbon disulfide, and nitric oxide. First-order rate constants for the reactions of ions were measured, and the reaction efficiencies were determined. Based on the reactivity results, a thermochemical model has been developed, which predicts the reaction thermochemistry by using thermochemical properties of model systems. The observed reactivity from ion-molecule reactions and the study of reaction rates show that the ion of 2,5-dicyanohexadiene and 2,5-di(4,4'-trifluoromethyl phenyl)-1,5-hexadiene undergo Cope cyclization, whereas the radical anions having substituents such as the fluoro, nitro, chloro, and acetyl groups do not.
Collapse
Affiliation(s)
- Silvi A Chacko
- The Department of Chemistry, Purdue University, West Lafayette, Indiana 47906-2084, USA
| | | |
Collapse
|