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Article ; Online: The effect of photolysis of sodium citrate treated with gold chloride using coloured light on the generation of gold nanoparticles and the repression of WiDr colon cancer cells.

Cheng, Chien-Wei / Lee, Shwu-Yuan / Zhan, Shao-Qi / Huang, Cheng-Liang / Chen, Tang-Yu / Yuann, Jeu-Ming P / Huang, Shiuh-Tsuen / Chiu, Chi-Ming / Liang, Ji-Yuan

Journal of photochemistry and photobiology. B, Biology

2024 Volume 251, Page(s) 112844

Abstract: Gold nanoparticles (GNPs) are usually formed via a wet chemical method using gold (III) chloride trihydrate (GC), which is treated with stable reducing agents such as sodium citrate (SC). This study determines the effect of coloured light on the ... ...

Abstract	Gold nanoparticles (GNPs) are usually formed via a wet chemical method using gold (III) chloride trihydrate (GC), which is treated with stable reducing agents such as sodium citrate (SC). This study determines the effect of coloured light on the formation of GNPs by irradiation of SC after the addition of GC (SCGC) and the effect of the SCGC photolytic procedure on the suppression of WiDr colon cancer cells by forming reactive oxygen species. The absorbance of surface plasmon resonance peaks at 523 nm are 0.069 and 0.219 for SCGC when treated with blue light illumination (BLI) and violet light irradiation (VLI), respectively, whereas green and red light treatments have little or no effect. Most GNPs have diameters ranging from 3 to 15 nm, with a mean of 6 nm, when SCGC is exposed to VLI for 1.5 h. Anionic superoxide radicals (O
MeSH term(s)	Humans ; Sodium Citrate ; Metal Nanoparticles/toxicity ; Gold/pharmacology ; Photolysis ; Propidium ; Colonic Neoplasms/drug therapy ; Gold Compounds
Chemical Substances	Sodium Citrate (1Q73Q2JULR) ; Gold (7440-57-5) ; gold chloride (11118-27-7) ; Propidium (36015-30-2) ; Gold Compounds
Language	English
Publishing date	2024-01-10
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	623022-2
ISSN	1873-2682 ; 1011-1344
ISSN (online)	1873-2682
ISSN	1011-1344
DOI	10.1016/j.jphotobiol.2024.112844
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Article ; Online: Inactivation of Pathogens via Visible-Light Photolysis of Riboflavin-5'-Phosphate.

Cheng, Chien-Wei / Lee, Shwu-Yuan / Chen, Tang-Yu / Yuann, Jeu-Ming P / Chiu, Chi-Ming / Huang, Shiuh-Tsuen / Liang, Ji-Yuan

Journal of visualized experiments : JoVE

2022 , Issue 182

Abstract: Riboflavin-5'-phosphate (or flavin mononucleotide; FMN) is sensitive to visible light. Various compounds, including reactive oxygen species (ROS), can be generated from FMN photolysis upon irradiation with visible light. The ROS generated from FMN ... ...

Abstract	Riboflavin-5'-phosphate (or flavin mononucleotide; FMN) is sensitive to visible light. Various compounds, including reactive oxygen species (ROS), can be generated from FMN photolysis upon irradiation with visible light. The ROS generated from FMN photolysis are harmful to microorganisms, including pathogenic bacteria such as Staphylococcus aureus (S. aureus). This article presents a protocol for deactivating S. aureus, as an example, via photochemical reactions involving FMN under visible light irradiation. The superoxide radical anion () generated during the FMN photolysis is evaluated via nitro blue tetrazolium (NBT) reduction. The microbial viability of S. aureus that is attributed to reactive species was used to determine the effectiveness of the process. The bacterial inactivation rate is proportional to FMN concentration. Violet light is more efficient in inactivating S. aureus than blue light irradiation, while the red or green light does not drive FMN photolysis. The present article demonstrates FMN photolysis as a simple and safe method for sanitary processes.
MeSH term(s)	Flavin Mononucleotide/chemistry ; Light ; Phosphates ; Photolysis ; Reactive Oxygen Species ; Staphylococcus aureus
Chemical Substances	Phosphates ; Reactive Oxygen Species ; Flavin Mononucleotide (7N464URE7E)
Language	English
Publishing date	2022-04-06
Publishing country	United States
Document type	Journal Article ; Video-Audio Media
ZDB-ID	2259946-0
ISSN	1940-087X ; 1940-087X
ISSN (online)	1940-087X
ISSN	1940-087X
DOI	10.3791/63531
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Article: Effects of free radicals from doxycycline hyclate and minocycline hydrochloride under blue light irradiation on the deactivation of Staphylococcus aureus, including a methicillin-resistant strain

Yuann, Jeu-Ming P. / Lee, Shwu-Yuan / He, Sin / Wong, Tak-Wah / Yang, Meei-Ju / Cheng, Chien-Wei / Huang, Shiuh-Tsuen / Liang, Ji-Yuan

Journal of photochemistry and photobiology. 2022 Jan., v. 226

2022

Abstract: Doxycycline hyclate (DCH) and minocycline hydrochloride (MH) are tetracycline antibiotics and broad-spectrum antimicrobial agents. The changes in DCH and MH under blue light (λ = 462 nm) irradiation in alkaline conditions (BLIA) were investigated. ... ...

Abstract	Doxycycline hyclate (DCH) and minocycline hydrochloride (MH) are tetracycline antibiotics and broad-spectrum antimicrobial agents. The changes in DCH and MH under blue light (λ = 462 nm) irradiation in alkaline conditions (BLIA) were investigated. Deactivation caused by superoxide anion radical (O₂•⁻) and deactivation from DCH and MH during photolysis on Staphylococcus aureus (S. aureus), including methicillin-resistant S. aureus (MRSA), were studied. DCH is relatively unstable compared to MH under BLIA. The level of O₂•⁻ generated from the MH-treated photoreaction is lower than that from DCH photolysis, and the DCH-treated photoreaction is more efficient at inactivating S. aureus and MRSA at the same radiant intensity. DCH subjected to BLIA decreased the viability of S. aureus and MRSA by 3.84 and 5.15 log, respectively. Two photolytic products of DCH (PPDs) were generated under BLIA. The mass spectra of the PPDs featured molecular ions at m/z 460.8 and 458.8. The molecular formulas of the PPDs were C₂₁H₂₂N₂O₁₀ and C₂₂H₂₄N₂O₉, and their exact masses were 462.44 and 460.44 g/mol, respectively. These results bolster the photolytic oxidation that leads to DCH-enhanced deactivation of S. aureus and MRSA. Photochemical treatment of DCH could be applied as a supplement in hygienic processes.
Keywords	blue light ; doxycycline ; hygiene ; irradiation ; light intensity ; methicillin-resistant Staphylococcus aureus ; minocycline ; oxidation ; photobiology ; photolysis ; superoxide anion ; tetracycline ; viability
Language	English
Dates of publication	2022-01
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	623022-2
ISSN	1873-2682 ; 1011-1344
ISSN (online)	1873-2682
ISSN	1011-1344
DOI	10.1016/j.jphotobiol.2021.112370
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: An investigation of the influence of reactive oxygen species produced from riboflavin-5'-phosphate by blue or violet light on the inhibition of WiDr colon cancer cells.

Chiu, Chi-Ming / Lee, Shwu-Yuan / Chen, Pin-Rong / Zhan, Shao-Qi / Yuann, Jeu-Ming P / Huang, Shiuh-Tsuen / Wu, Ming-Fang / Cheng, Chien-Wei / Chang, Yu-Chung / Liang, Ji-Yuan

Photodiagnosis and photodynamic therapy

2023 Volume 44, Page(s) 103810

Abstract: Riboflavin-5'-phosphate (FMN), an innocuous product of riboflavin (RF) phosphorylation, is vital for humans. FMN is sensitive to light illumination, as indicated by reactive oxygen species (ROS) formation. This investigation was undertaken to evaluate ... ...

Abstract	Riboflavin-5'-phosphate (FMN), an innocuous product of riboflavin (RF) phosphorylation, is vital for humans. FMN is sensitive to light illumination, as indicated by reactive oxygen species (ROS) formation. This investigation was undertaken to evaluate the influence of blue light illumination (BLI) and violet light illumination (VLI) upon FMN to develop a method to inhibit WiDr colon cancer cells by FMN photolysis. When FMN is subjected to BLI and VLI, it inhibits WiDr colon cancer cells by generating superoxide radical anions (O
MeSH term(s)	Humans ; Reactive Oxygen Species/metabolism ; Light ; Photochemotherapy/methods ; Photosensitizing Agents/pharmacology ; Riboflavin/pharmacology ; Colonic Neoplasms/drug therapy ; Phosphates
Chemical Substances	Reactive Oxygen Species ; Photosensitizing Agents ; Riboflavin (TLM2976OFR) ; Phosphates
Language	English
Publishing date	2023-09-23
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2149918-4
ISSN	1873-1597 ; 1572-1000
ISSN (online)	1873-1597
ISSN	1572-1000
DOI	10.1016/j.pdpdt.2023.103810
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Article ; Online: Effects of free radicals from doxycycline hyclate and minocycline hydrochloride under blue light irradiation on the deactivation of Staphylococcus aureus, including a methicillin-resistant strain.

Yuann, Jeu-Ming P / Lee, Shwu-Yuan / He, Sin / Wong, Tak-Wah / Yang, Meei-Ju / Cheng, Chien-Wei / Huang, Shiuh-Tsuen / Liang, Ji-Yuan

Journal of photochemistry and photobiology. B, Biology

2021 Volume 226, Page(s) 112370

Abstract	Doxycycline hyclate (DCH) and minocycline hydrochloride (MH) are tetracycline antibiotics and broad-spectrum antimicrobial agents. The changes in DCH and MH under blue light (λ = 462 nm) irradiation in alkaline conditions (BLIA) were investigated. Deactivation caused by superoxide anion radical (O
MeSH term(s)	Staphylococcus aureus
Language	English
Publishing date	2021-11-27
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	623022-2
ISSN	1873-2682 ; 1011-1344
ISSN (online)	1873-2682
ISSN	1011-1344
DOI	10.1016/j.jphotobiol.2021.112370
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Article ; Online: A study of the effect of reactive oxygen species induced by violet and blue light from oxytetracycline on the deactivation of Escherichia coli.

Cheng, Chien-Wei / Lee, Shwu-Yuan / Chen, Tang-Yu / Yang, Meei-Ju / Yuann, Jeu-Ming P / Chiu, Chi-Ming / Huang, Shiuh-Tsuen / Liang, Ji-Yuan

Photodiagnosis and photodynamic therapy

2022 Volume 39, Page(s) 102917

Abstract: Oxytetracycline (OTC), a tetracycline antibiotic, is a broad-spectrum antibacterial agent. In this investigation, liquid chromatography-mass spectrometry (LC-MS) is utilized to determine the effects of blue light (λ = 448 nm) illumination (BLIA) and ... ...

Abstract	Oxytetracycline (OTC), a tetracycline antibiotic, is a broad-spectrum antibacterial agent. In this investigation, liquid chromatography-mass spectrometry (LC-MS) is utilized to determine the effects of blue light (λ = 448 nm) illumination (BLIA) and violet light (λ = 403 nm) illumination (VLIA) on conformational changes in OTC at pH 7.8. The photochemical effect of OTC that is exposed to BLIA and VLIA on the deactivation of Escherichia coli (E. coli) is studied. The deactivation of E. coli has an insignificant effect on treatment with OTC alone. OTC is relatively unstable under BLIA and VLIA illumination in an alkaline solution, and OTC has been shown to inactivate E. coli by generating reactive oxygen species (ROS). Less anionic superoxide radicals (O
MeSH term(s)	Anti-Bacterial Agents/chemistry ; Anti-Bacterial Agents/pharmacology ; Escherichia coli ; Light ; Oxytetracycline/analysis ; Oxytetracycline/chemistry ; Oxytetracycline/pharmacology ; Photochemotherapy/methods ; Reactive Oxygen Species
Chemical Substances	Anti-Bacterial Agents ; Reactive Oxygen Species ; Oxytetracycline (X20I9EN955)
Language	English
Publishing date	2022-05-18
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	2149918-4
ISSN	1873-1597 ; 1572-1000
ISSN (online)	1873-1597
ISSN	1572-1000
DOI	10.1016/j.pdpdt.2022.102917
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Article ; Online: Effects of Epigallocatechin Gallate on the Stability of Epicatechin in a Photolytic Process.

Huang, Shiuh-Tsuen / Hung, Yi-An / Yang, Meei-Ju / Chen, Iou-Zen / Yuann, Jeu-Ming P / Liang, Ji-Yuan

Molecules (Basel, Switzerland)

2019 Volume 24, Issue 4

Abstract: Catechins belonging to polyhydroxylated polyphenols are the primary compounds found in green tea. They are associated with many physiological properties. Epicatechin (EC) is a non-gallate-type catechin with four phenolic hydroxyl groups attached. The ... ...

Abstract	Catechins belonging to polyhydroxylated polyphenols are the primary compounds found in green tea. They are associated with many physiological properties. Epicatechin (EC) is a non-gallate-type catechin with four phenolic hydroxyl groups attached. The changes in EC treated with color light illumination in an alkaline condition were investigated by chromatographic and mass analyses in this study. In particular, the superoxide anion radical (O₂•
MeSH term(s)	Catechin/analogs & derivatives ; Catechin/chemistry ; Drug Stability ; Molecular Structure ; Photolysis ; Tea/chemistry
Chemical Substances	Tea ; Catechin (8R1V1STN48) ; epigallocatechin gallate (BQM438CTEL)
Language	English
Publishing date	2019-02-22
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	1413402-0
ISSN	1420-3049 ; 1431-5165 ; 1420-3049
ISSN (online)	1420-3049
ISSN	1431-5165 ; 1420-3049
DOI	10.3390/molecules24040787
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Article: The Influence of the Degradation of Tetracycline by Free Radicals from Riboflavin-5'-Phosphate Photolysis on Microbial Viability.

Huang, Shiuh-Tsuen / Lee, Shwu-Yuan / Wang, Song-Hua / Wu, Chun-Yi / Yuann, Jeu-Ming P / He, Sin / Cheng, Chien-Wei / Liang, Ji-Yuan

Microorganisms

2019 Volume 7, Issue 11

Abstract: Tetracycline (TC) is a broad-spectrum antibiotic compound. Wastewater with TC may have an adverse effect on ecosystems. Riboflavin-5'-phosphate (FMN or flavin mononucleotide) is a non-toxic product of the phosphorylation of vitamin ... ...

Abstract	Tetracycline (TC) is a broad-spectrum antibiotic compound. Wastewater with TC may have an adverse effect on ecosystems. Riboflavin-5'-phosphate (FMN or flavin mononucleotide) is a non-toxic product of the phosphorylation of vitamin B
Language	English
Publishing date	2019-10-28
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2720891-6
ISSN	2076-2607
ISSN	2076-2607
DOI	10.3390/microorganisms7110500
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Article ; Online: Blue light induced free radicals from riboflavin in degradation of crystal violet by microbial viability evaluation.

Liang, Ji-Yuan / Yuann, Jeu-Ming P / Hsie, Zong-Jhe / Huang, Shiuh-Tsuen / Chen, Chiing-Chang

Journal of photochemistry and photobiology. B, Biology

2017 Volume 174, Page(s) 355–363

Abstract: Crystal violet (CV) is applied in daily use mainly as a commercial dye and antimicrobial agent. Waste water containing CV may affect aquatic ecosystems. Riboflavin, also known as vitamin ... ...

Abstract	Crystal violet (CV) is applied in daily use mainly as a commercial dye and antimicrobial agent. Waste water containing CV may affect aquatic ecosystems. Riboflavin, also known as vitamin B
MeSH term(s)	Gentian Violet/chemistry ; Gentian Violet/pharmacology ; Light ; Microbial Viability/drug effects ; Photolysis ; Riboflavin/chemistry ; Singlet Oxygen/chemistry ; Staphylococcus aureus/drug effects ; Staphylococcus aureus/physiology
Chemical Substances	Singlet Oxygen (17778-80-2) ; Gentian Violet (J4Z741D6O5) ; Riboflavin (TLM2976OFR)
Language	English
Publishing date	2017-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	623022-2
ISSN	1873-2682 ; 1011-1344
ISSN (online)	1873-2682
ISSN	1011-1344
DOI	10.1016/j.jphotobiol.2017.08.018
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Article ; Online: Expression, purification, and characterization of protective MPT64 antigen protein and identification of its multimers isolated from nontoxic Mycobacterium tuberculosis H37Ra.

Chu, Teng-Ping J / Yuann, Jeu-Ming P

Biotechnology and applied biochemistry

2011 Volume 58, Issue 3, Page(s) 185–189

Abstract: MPT64, a secreted protein of Mycobacterium tuberculosis (MTB), stimulates the immune reactions within cells and is a protective antigen that is lost by the bacilli Calmette-Guérin (BCG) vaccine during propagation. To minimize the toxicity caused by MTB, ... ...

Abstract	MPT64, a secreted protein of Mycobacterium tuberculosis (MTB), stimulates the immune reactions within cells and is a protective antigen that is lost by the bacilli Calmette-Guérin (BCG) vaccine during propagation. To minimize the toxicity caused by MTB, we used the MPT64 gene encoded by nontoxic H37Ra MTB to carry out genetic expansion via polymerase chain reaction and gene clone MPT64. The plasmid DNA encoded MPT64 was expressed at 20°C for 22 H, and a large quantity of MPT64 was obtained. In the absence of urea, MPT64 multimers with subunits being covalently connected via disulfide bonds were detected by Western blot showing strong protein-protein interactions, as evidenced by the formation of MPT64 tetramers. Finally, with urea of decreasing concentrations, we refolded MPT64 purified in the presence of urea and determined its secondary structures using circular dichroism. MPT64 was found to contain 2.2% α-helix, 50.9% β-sheet, 19.5% turn, and 27.4% random coil. The molecular weight of MPT64 was determined by a matrix-assisted laser desorption ionization-time of flight mass spectrometer and found to be 23,497 Da, very close to the theoretical molecular weight of MPT64. The results presented here provide a sound basis for future biochemical and biophysical studies of MPT64 or any other proteins encoded by nontoxic H37Ra MTB.
MeSH term(s)	Antigens, Bacterial/biosynthesis ; Antigens, Bacterial/chemistry ; Antigens, Bacterial/genetics ; Antigens, Bacterial/isolation & purification ; Circular Dichroism ; Gene Expression Profiling ; Molecular Weight ; Mycobacterium tuberculosis/chemistry ; Mycobacterium tuberculosis/genetics ; Plasmids/genetics ; Polymerase Chain Reaction ; Protein Refolding ; Protein Structure, Secondary
Chemical Substances	Antigens, Bacterial ; MPT64 protein, Mycobacterium tuberculosis
Language	English
Publishing date	2011-05
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	883433-7
ISSN	1470-8744 ; 0885-4513
ISSN (online)	1470-8744
ISSN	0885-4513
DOI	10.1002/bab.26
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