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Lee H, Kim SM, Rahaman MI, Kang DJ, Kim C, Kim TI, Kim SW. Corticosteroid-Antibiotic Interactions in Bacteria that Cause Corneal Infection. Transl Vis Sci Technol 2023; 12:16. [PMID: 37184498 PMCID: PMC10187793 DOI: 10.1167/tvst.12.5.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 04/22/2023] [Indexed: 05/16/2023] Open
Abstract
Purpose Although a comprehensive knowledge of antibiotic/corticosteroid combinations is essential for the appropriate treatment of eye infections, the impact of their co-administration has not been well studied to date. A systematic pharmacodynamic/pharmacokinetic study to determine the effects of cotreatment with various antibiotics and corticosteroids was conducted. Methods Four bacterial strains, seven antibiotics, and four corticosteroids were used in the analyses. Drug interactions were evaluated by considering antibacterial effects with a checkerboard assay and intracellular concentrations in human corneal epithelial cells. Results The drug combinations that showed the most stable effects against Pseudomonas aeruginosa was levofloxacin-prednisolone. Stable combinations against the three types of Gram-positive bacteria were neomycin-prednisolone, ofloxacin-dexamethasone, ofloxacin-prednisolone, and polymyxin-dexamethasone. The cellular concentrations were changed for the gatifloxacin-fluorometholone, moxifloxacin-fluorometholone, tobramycin-dexamethasone, and tobramycin-prednisolone combinations. Conclusions Loteprednol and fluorometholone reduced the antibacterial effects of all of the tested antibiotics in this study. Dexamethasone and prednisolone showed various effects in this regard, depending on the co-administered antibiotic. Prior knowledge of specific antibiotic/corticosteroid interactions provides valuable information to clinical practitioners by combining data on the antibacterial and intracellular uptake effects of their co-administration. Translational Relevance When using antibiotics and corticosteroids, drug combinations can be selected by referring to the results of this study.
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Affiliation(s)
- Hun Lee
- Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - So Myoung Kim
- Department of Pharmacology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
- Bio-Medical Institute of Technology, University of Ulsan, Seoul, Republic of Korea
| | - Md. Intazur Rahaman
- Department of Pharmacology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
- Bio-Medical Institute of Technology, University of Ulsan, Seoul, Republic of Korea
| | - Dong Ju Kang
- College of Pharmacy, Korea University, Sejong, Republic of Korea
| | - Changhyun Kim
- Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Tae-im Kim
- The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
- Corneal Dystrophy Research Institute, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - So Won Kim
- Department of Pharmacology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
- Bio-Medical Institute of Technology, University of Ulsan, Seoul, Republic of Korea
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Lee DH, Hasanuzzaman M, Kwon D, Choi HY, Kim SM, Kim DJ, Kang DJ, Hwang TH, Kim HH, Shin HJ, Shin JG, Oh S, Lee S, Kim SW. 10-Phenyltriazoyl Artemisinin is a Novel P-glycoprotein Inhibitor that Suppresses the Overexpression and Function of P-glycoprotein. Curr Pharm Des 2019; 24:5590-5597. [DOI: 10.2174/1381612825666190222155700] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 02/13/2019] [Indexed: 12/11/2022]
Abstract
Background:
The effect of drugs on ATP-binding cassette transporters, especially permeabilityglycoprotein
(P-gp), is an important consideration during new anti-cancer drug development.
Objective:
In this context, the effects of a newly synthesized artemisinin derivative, 10-(4-phenyl-1H-1,2,3-
triazol)-artemisinin (5a), were evaluated on P-gp expression and function.
Methods:
Reverse transcript polymerase chain reaction and immunoblotting techniques were used to determine
the effect of 5a on P-gp expression in LS174T cells. In addition, the ability of 5a to work as either a substrate or
an inhibitor of P-gp was investigated through different methods.
Results:
The results revealed that 5a acts as a novel P-gp inhibitor that dually suppresses the overexpression and
function of P-glycoprotein. Co-treatment of LS174T cell line, human colon adenocarcinoma cell line, with 5a and
paclitaxel recovered the anticancer effect of paclitaxel by controlling the acquired drug resistance pathway. The
overexpression of P-gp induced by rifampin and paclitaxel in a colorectal cell line was suppressed by 5a which
could be a novel inhibitory substrate inhibiting the transport of paclitaxel by P-gp.
Conclusion:
The results revealed that 5a can be classified as a type B P-gp inhibitor (with both substrate and
inhibitor activities) with an additional function of suppressing P-gp overexpression. The results might be clinically
useful in the development of anticancer drugs against cancers with multidrug resistance.
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Affiliation(s)
- Dong-Hwan Lee
- Hallym Institute for Clinical Medicine, Hallym University Medical Center, Anyang, 14066, Korea
| | - Md. Hasanuzzaman
- Department of Pharmacy, Noakhali Science and Technology University, Sonapur, Noakhali 3814, Bangladesh
| | - Daeho Kwon
- Department of Microbiology, Catholic Kwandong University College of Medicine, Gangneung 25601, Korea
| | - Hye-Young Choi
- Department of Pharmacology, Catholic Kwandong University College of Medicine, Gangneung 25601, Korea
| | - So Myoung Kim
- Department of Pharmacology, Catholic Kwandong University College of Medicine, Gangneung 25601, Korea
| | - Dong Jin Kim
- Approval and Review Team, Medical Device Safety Bureau, Ministry of Food and Drug Safety, Cheongju 28159, Korea
| | - Dong Ju Kang
- Department of Pharmacology, Catholic Kwandong University College of Medicine, Gangneung 25601, Korea
| | - Tae-Ho Hwang
- Gene and Cell Therapy Research Center for Vessel-associated Diseases, Department of Pharmacology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Hyung-Hoi Kim
- Department of Laboratory Medicine, (Bio) Medical Research Institute, School of Medicine, Pusan National University, Pusan National University Hospital, Busan 4924, Korea
| | - Ho Jung Shin
- SPMED Co., Ltd., 111 Hyoyeol-ro, Buk-gu, Busan 46508, Korea
| | - Jae-Gook Shin
- Department of Pharmacology and Pharmacogenomics Research Center, Inje University College of Medicine, Busan 47392, Korea
| | - Sangtae Oh
- Department of Basic Science, Catholic Kwandong University College of Medicine, Gangneung 25601, Korea
| | - Seokjoon Lee
- Department of Pharmacology, Catholic Kwandong University College of Medicine, Gangneung 25601, Korea
| | - So Won Kim
- Department of Pharmacology, Catholic Kwandong University College of Medicine, Gangneung 25601, Korea
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Kang YT, Kang DP, Kang DJ, Chung ID. Synthesis and properties of nanohybrid materials with SiO2 and epoxy resin. J Nanosci Nanotechnol 2014; 14:3557-3560. [PMID: 24734587 DOI: 10.1166/jnn.2014.7797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
SiO2-epoxy nanohybrid materials were synthesized by hybridization of surface-modified colloidal silica nanoparticle (CS) and epoxy resin. The CS was surface-modified with either methyltrimethoxysilane (MTMS) or phenyltrimethoxysilane (PTMS) followed by the solvent exchange with dimethylacetamide (DMAc) to have a homogenous dispersion in epoxy resin. Various amounts of surface-modified CS were mixed with epoxy resin. The chemical structures of surface-modified CS were investigated with FT-IR spectroscopy. The particle sizes of CS and surface-modified CS were measured with DLS. The morphology of hybrid materials analyzed using FE-SEM and AFM showed homogeneous dispersion in epoxy resin. The optical and thermal properties of the hybrid materials determined by refractive index meter and DSC were lower in RI and higher in Tg than neat epoxy resin, respectively.
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Kang YT, Kang DP, Kang DJ, Chung ID. Effect of SiO2-acryl nanohybrid coating layers on transparent conducting oxide-poly(ethylene terephthalate) superstrate. J Nanosci Nanotechnol 2013; 13:3669-3673. [PMID: 23858925 DOI: 10.1166/jnn.2013.7241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
SiO2-acryl nanohybrid coating layers were produced by hybridizing acrylic resin and surface-modified colloidal silica (CS) nanoparticles. First, CS nanoparticles were modified with methyltrimethoxysilane (MTMS) and vinyltrimethoxysilane (VTMS) by a sol-gel process. The surface-modified CS nanoparticles were then solvent-exchanged to be homogeneous in acrylic resin. The Hybrid materials were mixed in variation with the amount of surface-modified CS nanoparticles, coated with poly(ethylene terephthalate) (PET), then finally cured by UV light to obtain a hybrid coating layer. Field emission scanning electron microscopy (FE-SEM), particle size analysis (using a Zetasizer), and atomic force microscopy (AFM) were performed to determine the morphology of the hybrid thin-films. Thermogravimetric analysis (TGA) was used to investigate the thermal properties. Fourier-transform infrared (FTIR), ultraviolet-visible (UVNis) spectroscopies, and pencil hardness were used to obtain the details of chemical structures, optical properties, and hardness, respectively. The hybrid thin films had shown to be enhanced properties compared to their urethane acrylate prepolymer (UAP) coating film.
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Affiliation(s)
- Y T Kang
- Advanced Materials and Application Research Division, Korea Electrotechnology Research Institute, Changwon 642-120, Korea
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Liu XG, Geng DY, Jiang JJ, Du J, Yang F, Xie ZG, Kang DJ, Zhang ZD. High dielectric loss in graphite-coated Ti nanocapsules. J Nanosci Nanotechnol 2010; 10:2366-2369. [PMID: 20355435 DOI: 10.1166/jnn.2010.2159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Graphite-coated Ti nanocapsules, with Ti nanoparticles as core and onion-like graphite layers as shell, have been prepared by a modified arc-discharge method in ethanol atmosphere, and characterized by means of X-ray diffraction, transmission electron microscopy and Raman spectroscopy. The dielectric properties of the graphite-coated Ti nanocapsules have been investigated in the 2-18 GHz range. An equivalent circuit model was used to interpret the non-linear dielectric resonance behavior of the graphite-coated Ti nanocapsules. The high dielectric loss is mainly attributed to conductance loss and dipole-relaxation loss in the graphite-coated Ti nanocapsules. The graphite-coated Ti nanocapsules exhibit promising properties for application as a new type of shield or absorbent of electromagnetic waves.
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Affiliation(s)
- X G Liu
- Shenyang National Laboratory for Material Science, Institute of Metal Research, and International Centre for Material Physics, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, People's Republic of China
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Cha SN, Song BG, Jang JE, Jung JE, Han IT, Ha JH, Hong JP, Kang DJ, Kim JM. Controlled growth of vertically aligned ZnO nanowires with different crystal orientation of the ZnO seed layer. Nanotechnology 2008; 19:235601. [PMID: 21825796 DOI: 10.1088/0957-4484/19/23/235601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A novel synthesis and growth method achieving vertically aligned zinc oxide (ZnO) nanowires on a silicon dioxide (SiO(2)) coated silicon (Si) substrate is demonstrated. The growth direction of the ZnO nanowires is determined by the crystal structure of the ZnO seed layer, which is formed by the oxidation of a DC-sputtered Zn film. The [002] crystal direction of the seed layer is dominant under optimized thickness of the Zn film and thermal treatment. Vertically aligned ZnO nanowires on SiO(2) coated Si substrate are realized from the appropriately thick oxidized Zn seed layer by a vapor-solid growth mechanism by catalyst-free thermal chemical vapor deposition (CVD). These experimental results raise the possibility of using the nanowires as functional blocks for high-density integration systems and/or photonic applications.
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Affiliation(s)
- S N Cha
- Samsung Advanced Institute of Technology, PO Box 111, Suwon 440-600, Korea
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Stevenson R, Milner RG, Richards D, Arias AC, MacKenzie JD, Halls JJ, Friend RH, Kang DJ, Blamire M. Fluorescence scanning near-field optical microscopy of polyfluorene composites. J Microsc 2001; 202:433-8. [PMID: 11309108 DOI: 10.1046/j.1365-2818.2001.00871.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Fluorescence scanning near-field optical microscopy (SNOM) is used to investigate binary polyfluorene-based composites of varying composition. The samples investigated contain blends of the polymer poly(9,9'-dioctylfluorene-cobenzothiadiazole), F8BT, with similar polyfluorenes of wider band gap. Images acquired from a film containing 50% by weight F8BT exhibit a high degree of correlation between the topography and fluorescence, with an F8BT-rich phase which protrudes from the surface of the film forming isolated regions with sizes from hundreds of nanometres to several micrometres. A film containing 10% by weight F8BT also has micrometre-size F8BT-rich regions, but also present are small and locally varying proportions of F8BT in the other polyfluorene component phase, indicating a hierarchy of phases within this sample. The fluorescence and topographic images of a third sample studied, containing 90% by weight F8BT, display no correlation, demonstrating that it is not always appropriate to use topographic information to determine the phase structure within polymer blends. The fluorescence SNOM images acquired from these samples are able to assist our understanding of the photovoltaic efficiency of devices fabricated from these films, which are governed by the extent of the interfacial area between these two constituent polymers.
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Affiliation(s)
- R Stevenson
- Department of Physics, Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, U.K
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