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Jeon S, Jeon JH, Jeong J, Kim G, Lee S, Kim S, Maruthupandy M, Lee K, Yang SI, Cho WS. Size- and oxidative potential-dependent toxicity of environmentally relevant expanded polystyrene styrofoam microplastics to macrophages. J Hazard Mater 2023; 459:132295. [PMID: 37597397 DOI: 10.1016/j.jhazmat.2023.132295] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/31/2023] [Accepted: 08/12/2023] [Indexed: 08/21/2023]
Abstract
Expanded polystyrene (EPS), also known as Styrofoam, is a widespread global pollutant, and its lightweight floating property increases its chances of weathering by abrasion and ultraviolet (UV) irradiation, resulting in microplastics. Herein, we investigated the effects of particle size ((1 µm versus 10 µm), UV irradiation (pristine versus UV oxidation), and origin (secondary versus primary) on the toxicity of Styrofoam microplastics. The target cells used in this study were selected based on human exposure-relevant cell lines: differentiated THP-1 cells for macrophages, Caco-2 for enterocytes, HepG2 for hepatocytes, and A549 for alveolar epithelial cells. In the differentiated THP-1 cells, the levels of cytotoxicity and inflammatory cytokines showed size- (1 µm > 10 µm), UV oxidation- (UV > pristine), and origin- (secondary > primary) dependency. Furthermore, the intrinsic oxidative potential of the test particles was positively correlated with cellular oxidative levels and toxicity endpoints, suggesting that the toxicity of Styrofoam microplastics also follows the oxidative stress paradigm. Additionally, all microplastics induced the activation of the pyrin domain-containing protein 3 (NLRP3) inflammasome and the release of interleukin-1β (IL-1β). These results imply that weathering process can aggravate the toxicity of Styrofoam microplastics due to the increased oxidative potential and decreased particle size.
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Affiliation(s)
- Soyeon Jeon
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 beon-gil, Saha-gu, Busan 49315, Republic of Korea
| | - Jun Hui Jeon
- Department of Applied Chemistry, Kyung Hee University, Yongin-si 17104, Republic of Korea
| | - Jiyoung Jeong
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 beon-gil, Saha-gu, Busan 49315, Republic of Korea
| | - Gyuri Kim
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 beon-gil, Saha-gu, Busan 49315, Republic of Korea
| | - Sinuk Lee
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 beon-gil, Saha-gu, Busan 49315, Republic of Korea
| | - Songyeon Kim
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 beon-gil, Saha-gu, Busan 49315, Republic of Korea
| | - Muthuchamy Maruthupandy
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 beon-gil, Saha-gu, Busan 49315, Republic of Korea
| | - Kyuhong Lee
- Inhalation Toxicology Center for Airborne Risk Factor, Korea Institute of Toxicology, 30 Baehak1-gil, Jeongeup, Jeollabuk-do 56212, Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry, Kyung Hee University, Yongin-si 17104, Republic of Korea.
| | - Wan-Seob Cho
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 beon-gil, Saha-gu, Busan 49315, Republic of Korea.
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Shin H, Jeong S, Hong J, Wi E, Park E, Yang SI, Kwon JT, Lee H, Lee J, Kim Y. Rapid generation of aged tire-wear particles using dry-, wet-, and cryo-milling for ecotoxicity testing. Environ Pollut 2023; 330:121787. [PMID: 37156438 DOI: 10.1016/j.envpol.2023.121787] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/10/2023]
Abstract
Strict environmental laws have been enacted to regulate the emission of exhaust particulate matter (PM), which is one of the most hazardous pollutants that reduce air quality and pose a serious risk to the human health. In addition, non-exhaust PM, such as road wear, tire wear, and brake wear debris, is a significant source of airborne pollutants. Road dust less than 100 μm in size may include tire wear particles (TWPs), which are broken down into finer particles with sizes on the order of tens of micrometers because of weathering. TWPs can be transported to water bodies via runoff, potentially contaminating water systems and negatively affecting aquatic ecosystems. Therefore, ecotoxicity tests using reference TWPs are required to investigate the impact of TWPs on the human health and environment. In this study, aged TWPs were produced using dry-, wet-, and cryo-milling methods, and the dispersion stability of TWPs in dechlorinated water was evaluated. Aged TWPs prepared by dry- and wet-milling had an average particle size of 20 μm, whereas pristine TWPs had an irregular shape and average particle size of 100 μm. The capacity of the ball-milling cylinder and excessively long 28-d generation time constrain the amount of aged TWPs that can be produced through conventional milling. In contrast, cryo-milling reduces the particle size of TWPs at the rate of -275.0 μm/d, which is nine times higher than that upon dry- and wet-milling. Dispersed cryo-milled TWPs had a hydrodiameter of 2.02 μm and were more stable in the aqueous phase in relation to the other aged TWPs. The results of this study suggest that cryo-milled TWPs can be used for aquatic exposure assessments as controls for real-world TWPs.
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Affiliation(s)
- Hyeokjin Shin
- Department of Chemical Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Sohee Jeong
- Department of Chemical Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Jaehwan Hong
- Department of Chemical Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Eunsoo Wi
- Department of Chemical Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Eunhae Park
- Department of Chemical Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Sung Ik Yang
- Department of Applied Chemistry, Kyung Hee University, Yongin, 17104, South Korea
| | - Jung-Taek Kwon
- Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research, Incheon, 22733, South Korea
| | - Hyejin Lee
- Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research, Incheon, 22733, South Korea
| | - Jaewoong Lee
- Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research, Incheon, 22733, South Korea
| | - Younghun Kim
- Department of Chemical Engineering, Kwangwoon University, Seoul, 01897, South Korea.
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Kwon J, Jeon JH, Yang SI, Yang H. Rapid and sensitive detection of
Aspergillus niger
using permeabilization based on tris buffer containing hydrazine. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Jungwook Kwon
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan Korea
| | - Jun Hui Jeon
- Department of Applied Chemistry Kyung Hee University Yongin Korea
| | - Sung Ik Yang
- Department of Applied Chemistry Kyung Hee University Yongin Korea
| | - Haesik Yang
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan Korea
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Jeon S, Lee DK, Jeong J, Yang SI, Kim JS, Kim J, Cho WS. The reactive oxygen species as pathogenic factors of fragmented microplastics to macrophages. Environ Pollut 2021; 281:117006. [PMID: 33812130 DOI: 10.1016/j.envpol.2021.117006] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 03/14/2021] [Accepted: 03/21/2021] [Indexed: 06/12/2023]
Abstract
The presence of microplastics in the various food web raised concerns on human health, but little is known about the target cells and mechanism of toxicity of microplastics. In this study, we evaluated the toxicity of microplastics using relevant cell lines to the oral route of exposure. Approximately 100 μm-sized fragment-type polypropylene (PP) and polystyrene (PS) particles were prepared by sieving after pulverization and further applied the accelerated weathering using ultraviolet and heat. Thus, the panel of microplastics includes fresh PP (f-PP), fresh PS (f-PS), weathered PP (w-PP), and weathered PS (w-PS). The spherical PS with a similar size was used as a reference particle. Treatment of all types of PP and PS did not show any toxic effects to the Caco-2 cells and HepG2 cells. However, the treatment of microplastics to THP-1 macrophages showed significant toxicity in the order of f-PS > f-PP > w-PS > w-PP. The weathering process significantly reduced the reactive oxygen species (ROS) generation potential of both microplastics because the weathered microplastics have an increased affinity to bind serum protein which acts as a ROS scavenger. The intrinsic ROS generation potential of microplastics showed a good correlation with the toxicity endpoints including cytotoxicity and pro-inflammatory cytokines in THP-1 macrophages. In conclusion, the results of this study suggest that the target cell type of microplastics via oral administration can be macrophages and the pathogenic factor to THP-1 macrophages is the intrinsic ROS generation potential of microplastics. Nevertheless, the toxic effect of microplastics tested in this study was much less than that of nano-sized particles.
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Affiliation(s)
- Soyeon Jeon
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 Beon-gil, Saha-gu, Busan, 49315, Republic of Korea
| | - Dong-Keun Lee
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 Beon-gil, Saha-gu, Busan, 49315, Republic of Korea
| | - Jiyoung Jeong
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 Beon-gil, Saha-gu, Busan, 49315, Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry, Kyung Hee University, Yongin-si, 17104, Republic of Korea
| | - Ji-Su Kim
- Primate Resources Center (PRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, 56216, Republic of Korea
| | - Jinsik Kim
- Korea Conformity Laboratories, 8, Gaetbeol-ro 145 Beon-gil, Yeonsu-gu, Incheon, 21999, Republic of Korea.
| | - Wan-Seob Cho
- Lab of Toxicology, Department of Health Sciences, The Graduate School of Dong-A University, 37, Nakdong-daero 550 Beon-gil, Saha-gu, Busan, 49315, Republic of Korea.
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5
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Lee J, Kim S, Chung HY, Kang A, Kim S, Hwang H, Yang SI, Yun WS. Electrochemical microgap immunosensors for selective detection of pathogenic Aspergillus niger. J Hazard Mater 2021; 411:125069. [PMID: 33454571 DOI: 10.1016/j.jhazmat.2021.125069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/18/2020] [Accepted: 01/02/2021] [Indexed: 06/12/2023]
Abstract
Aspergillus niger (A. niger) is a well-known allergenic, harmful fungus in the indoor environment that can cause asthmatic symptoms and atopy. Previous immunosensing approach suffers from an insufficient detection limit, mainly because there are no techniques for target amplification. We report an electrochemical immunosensor that selectively quantifies the A. niger based on the detection of extracellular proteins by using a specific interaction with antibody. The sensor was designed to show a decrease in redox current upon binding of the antigens secreted from A. niger onto an antibody-immobilized surface between the interdigitated electrodes. The extracellular proteins were profiled by LC-MS/MS to identify the antigens existing in the A. niger solution. Since the targets of the sensor are the proteins, its sensitivity and selectivity remain almost intact even after filtration of the spores. It was also found that the use of secretion promoter in the sampling stage greatly improved the sensor's limit of detection (LOD) for the spores. By this, the LOD was lowered by a few orders of magnitude so as to reach the value as low as ~101 spores/mL.
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Affiliation(s)
- Jisu Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea
| | - Semee Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea
| | - Ha Young Chung
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Aeyeon Kang
- Nano/Bio Fusion Technology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seunghun Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea
| | - Heeyoun Hwang
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea.
| | - Wan Soo Yun
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea; Nano/Bio Fusion Technology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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6
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Kim J, Yang SI, Moon H, Hong J, Hong J, Choi W, Son H, Lee BC, Kim GB, Kim Y. Potential release of nano-carbon black from tire-wear particles through the weathering effect. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.01.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Park BS, Kye HG, Kim TH, Lee JM, Ahrberg CD, Cho EM, Yang SI, Chung BG. Continuous separation of fungal spores in a microfluidic flow focusing device. Analyst 2019; 144:4962-4971. [PMID: 31322144 DOI: 10.1039/c9an00905a] [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] [Indexed: 12/29/2022]
Abstract
The research of fungi is of great importance in a number of fields, such as environmental and healthcare studies. While there are a large number of optical and molecular methods available for characterization and identification of fungi and their spores, their isolation is still conducted using slow and labor-intensive methods. Here, we develop a microfluidic device for the continuous separation of fungal spores from other eukaryotic cells. The spores were separated through the microfluidic device by expanding pinched flow fractionation (PFF) containing the spores, achieving a spatial separation perpendicular to the flow direction according to the spore size. Further branch flow fractionation (BFF) and co-flow of a Newtonian and viscoelastic fluid were used to enhance the separation performance. Using this microfluidic device, we demonstrated the separation of two different types of fungal spores and further separation of fungal spores from eukaryotic cells with a separation efficiency of above 90%. Compared to the existing conventional methods, our microfluidic flow focusing device requires little manual handling and uses small amounts of samples without any pre-treatment steps of the samples.
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Affiliation(s)
- Byeong Seon Park
- Department of Mechanical Engineering, Sogang University, Seoul, Republic of Korea.
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8
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Kwon J, Cho EM, Nandhakumar P, Yang SI, Yang H. Correction to “Rapid and Sensitive Detection of Aspergillus niger Using a Single-Mediator System Combined with Redox Cycling”. Anal Chem 2019; 91:2559. [DOI: 10.1021/acs.analchem.8b05874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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9
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Yamindago A, Lee N, Woo S, Choi H, Mun JY, Jang SW, Yang SI, Anton-Erxleben F, Bosch TCG, Yum S. Acute toxic effects of zinc oxide nanoparticles on Hydra magnipapillata. Aquat Toxicol 2018; 205:130-139. [PMID: 30384194 DOI: 10.1016/j.aquatox.2018.10.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 06/08/2023]
Abstract
Zinc oxide nanoparticles (ZnO NPs) are increasingly used in various products as coating and additive materials for household goods, personal-care products, and drug delivery systems. Because of their broad applications, the potential risks to nontarget organisms associated with their input into aquatic environments have generated much concern. We investigated the acute toxicity, morphological responses, and potential impact on physiology and metabolism in polyps exposed to spherical ZnO NPs of either 20 nm (ZnO NP20) or 100 nm (ZnO NP100). The median lethal concentrations (LC50) of ZnO NP20 were 55.3, 8.7, and 7.0 μg/mL after exposure for 48, 72, and 96 h, respectively; and those of ZnO NP100 were 262.0, 14.9, and 9.9 μg/mL, respectively. The morphological responses of the hydra polyps to a range of ZnO NP concentrations suggest that ZnO NPs may negatively affect neurotransmission in Hydra. ZnO NPs may also induce abnormal regeneration in the polyps by affecting the expression of several genes related to the Wnt signaling pathway. The presence of ZnO NP20 in the hydra tissue was confirmed with electron microscopy. A Gene Ontology analysis of the genes differentially expressed in hydra polyps after exposure to ZnO NP20 for 12 or 24 h revealed changes in various processes, including cellular and metabolic process, stress response, developmental process, and signaling. A KEGG pathway analysis of hydra polyps after exposure of ZnO NP20 or ZnO NP100 for 12 or 24 h demonstrated various changes, including in the DNA replication and repair, endocytosis, lysosomes, Wnt signaling, and natural killer-cell-mediated cytotoxicity pathways, suggesting the mechanisms that maintain cellular homeostasis in response to ZnO NPs. Progesterone-mediated oocyte maturation was also affected by the ZnO NPs nanoparticles, suggesting that they are potential endocrine disruptors. This study should increase our concern regarding the dispersal of ZnO NPs in aquatic environments.
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Affiliation(s)
- Ade Yamindago
- South Sea Environment Research Center, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, Republic of Korea; Faculty of Marine Environmental Science, University of Science and Technology (UST), Geoje 53201, Republic of Korea; Faculty of Fisheries and Marine Science, Brawijaya University, Malang 65145, Indonesia
| | - Nayun Lee
- South Sea Environment Research Center, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, Republic of Korea
| | - Seonock Woo
- Marine Biotechnology Research Center, Korea Institute of Ocean Science and Technology (KIOST), Busan 49111, Republic of Korea
| | - Hyosun Choi
- BK21 Plus Program, Department of Senior Healthcare, Graduate School, Eulji University, Daejeon 34824, Republic of Korea
| | - Ji Young Mun
- Department of Structure and Function of Neural Network, Korea Brain Research Institute, Dong-gu, Daegu 41068, Republic of Korea
| | - Seok-Won Jang
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea
| | | | - Thomas C G Bosch
- Zoological Institute, Christian-Albrechts University of Kiel, Kiel D-24118, Germany
| | - Seungshic Yum
- South Sea Environment Research Center, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, Republic of Korea; Faculty of Marine Environmental Science, University of Science and Technology (UST), Geoje 53201, Republic of Korea.
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10
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Kwon J, Cho EM, Nandhakumar P, Yang SI, Yang H. Rapid and Sensitive Detection of Aspergillus niger Using a Single-Mediator System Combined with Redox Cycling. Anal Chem 2018; 90:13491-13497. [PMID: 30403470 DOI: 10.1021/acs.analchem.8b03417] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Rapid and sensitive mold detection is becoming increasingly important, especially in indoor environments. Common mold detection methods based on double-mediated electron transfer between an electrode and molds are not highly sensitive and reproducible, although they are rapid and simple. Here, we report a sensitive and reproducible detection method specific to Aspergillus niger ( A. niger), based on a single-mediator system combined with electrochemical-chemical (EC) redox cycling. Intracellular NAD(P)H-oxidizing enzymes in molds can convert electro-inactive hydroxy-nitro(so)arenes into electro-active hydroxy-aminoarenes. Since the membrane and wall of A. niger is well permeable to both a substrate (4-nitro-1-naphthol) and a reduced product (4-amino-1-naphthol) in tris buffer (pH 7.5) solution, the electrochemical signal is increased in the presence of A. niger due to two reactions: (i) enzymatic reduction of the substrate to the reduced product and (ii) electrochemical oxidation of the reduced product to an oxidized product. When a reducing agent (NADH) is present in the solution, the oxidized product is reduced back to the reduced product and then electrochemically reoxidized. This EC redox cycling significantly amplifies the electrochemical signal. Moreover, the background level is low and highly reproducible because the substrate and the reducing agent are electro-inactive at an applied potential of 0.20 V. The calculated detection limit for A. niger in a common double-mediator system consisting of Fe(CN)63- and menadione is ∼2 × 104 colony-forming unit (CFU)/mL, but the detection limit in the single-mediator system combined with EC redox cycling is ∼2 × 103 CFU/mL, indicating that the newly developed single-mediator system is more sensitive. Importantly, the detection method requires only an incubation period of 10 min and does not require a washing step, an electrode modification step, or a specific probe.
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Affiliation(s)
- Jungwook Kwon
- Department of Chemistry and Chemistry Institute for Functional Materials , Pusan National University , Busan 46241 , Korea
| | - Eun-Min Cho
- Department of Applied Chemistry , Kyung Hee University , Yongin 17104 , Korea
| | - Ponnusamy Nandhakumar
- Department of Chemistry and Chemistry Institute for Functional Materials , Pusan National University , Busan 46241 , Korea
| | - Sung Ik Yang
- Department of Applied Chemistry , Kyung Hee University , Yongin 17104 , Korea
| | - Haesik Yang
- Department of Applied Chemistry , Kyung Hee University , Yongin 17104 , Korea
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11
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Affiliation(s)
- Biao Li
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
| | - Dan Li
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
| | - Lei Mu
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
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12
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Affiliation(s)
- Tielong Gao
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
| | - Kyung Mi Lee
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
| | - Seon Ho Kim
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
| | - Jiyoung Heo
- Department of Biomedical Technology; Sangmyung University; Cheonan 31066 Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry; Kyung Hee University; Yongin 17104 Republic of Korea
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13
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Abstract
The toxicity of partially hydrolyzed guar gum (PHGG, average molecular weight 20,000) was evaluated in a 28-day, repeated oral dosing study (gavage) in rats at doses of 0, 500, and 2,500 mg/kg/day and in Salmonella typhimurium, with and without metabolic activation. PHGG did not elicit any signs of toxicity at the doses tested. PHGG was not mutagenic.
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Affiliation(s)
- Hidehisa Takahashi
- Sandoz Nutrition 5320 W. 23rd Street, P.O. Box 370, Minneapolis, MN 55440, U.S.A
| | - Sung Ik Yang
- Sandoz Nutrition 5320 W. 23rd Street, P.O. Box 370, Minneapolis, MN 55440, U.S.A
| | - Masaru Fujiki
- Sandoz Nutrition 5320 W. 23rd Street, P.O. Box 370, Minneapolis, MN 55440, U.S.A
| | - Mujo Kim
- Sandoz Nutrition 5320 W. 23rd Street, P.O. Box 370, Minneapolis, MN 55440, U.S.A
| | - Takehiko Yamamoto
- Sandoz Nutrition 5320 W. 23rd Street, P.O. Box 370, Minneapolis, MN 55440, U.S.A
| | - Norman A. Greenberg
- Sandoz Nutrition 5320 W. 23rd Street, P.O. Box 370, Minneapolis, MN 55440, U.S.A
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14
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Jang SW, Oh MS, Yang SI, Cho EM. Gene expression profiles of human neuroblastoma cells exposed to CuO nanoparticles and Cu ions. BioChip J 2016. [DOI: 10.1007/s13206-016-0209-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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15
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Affiliation(s)
- Xiao Guang Hu
- Department of Applied Chemistry; Kyung Hee University; Yongin 446-701 Republic of Korea
| | - XiaoLiang Li
- Department of Applied Chemistry; Kyung Hee University; Yongin 446-701 Republic of Korea
| | - Seok Ho Park
- Department of Agricultural Engineering; National Academy of Agricultural Science; Wanju-gun 55365 Republic of Korea
| | - Yong-Hoon Kim
- Department of Agricultural Engineering; National Academy of Agricultural Science; Wanju-gun 55365 Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry; Kyung Hee University; Yongin 446-701 Republic of Korea
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16
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Yang SI, Yuan Y, Jiao S, Luo QI, Yu J. Calcitonin gene-related peptide protects rats from cerebral ischemia/reperfusion injury via a mechanism of action in the MAPK pathway. Biomed Rep 2016; 4:699-703. [PMID: 27284409 PMCID: PMC4887836 DOI: 10.3892/br.2016.658] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 04/14/2016] [Indexed: 11/06/2022] Open
Abstract
The aim of the present study was to investigate the protective function and underlying mechanism of calcitonin gene-related peptide (CGRP) on cerebral ischemia/reperfusion damage in rats. Adult male Wistar rats were selected for the establishment of an ischemia/reperfusion injury model through the application of a middle cerebral artery occlusion. Animals were randomly divided into 6 groups of 24 animals. Drugs were administered according to the design of each group; animals were administered CGRP, CGRP8-37, PD98059 and SB20358. The neurobehavioral scores of the rat cerebral ischemia model in each group were calculated. The infarction range of the rat brain tissues was observed by 2,3,5-triphenyltetrazolium chloride staining. The expression levels of three proteins, phosphorylated c-Jun N-terminal kinase (JNK)/JNK, phosphorylated extracellular signal-regulated protein kinase (ERK)/ERK and p-p38/p38, in the mitogen-activated protein kinase (MAPK) pathway in the brain tissues was detected by western blotting. The results showed that CGRP could improve the neurobehavioral function of the ischemic rats and reduce the infarction range. Western blotting results confirmed that the function of the CGRP was mediated mainly through the reduction of the JNK and p38 phosphorylation and the promotion of ERK phosphorylation. Therefore, the present study confirmed that an increase in the exogenous CRGP could effectively improve ischemia/reperfusion injury of the brain tissue. The mechanisms of action were achieved through a reduction in JNK and p38 phosphorylation and an increase in ERL phosphorylation in the MAPK pathway. These mechanisms were interdependent.
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Affiliation(s)
- S I Yang
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China; Department of Pediatric Neurology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yongjie Yuan
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Shan Jiao
- Department of Endodontics, Stomatological Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Q I Luo
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Jinlu Yu
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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17
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Cho EM, Ganbold EO, Lam ATN, Singh DK, Kim D, Yang SI, Lee SY, Joo SW. Physicochemical characterization of the structure and desorption relationship of tioconazole-assembled gold nanoparticles investigated by density functional theory and Raman spectroscopy. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.09.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Abstract
A novel infinite coordination polymer (DAE-ICP) based on zinc nitrite and a diarylethene photoswitch, with reversible photochromic properties in solution and the solid state upon applying photostimuli, was synthesized and characterized by FT-IR, EDX, FE-SEM and FE-TEM.
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Affiliation(s)
- Xiao Guang Hu
- Department of Applied Chemistry, Kyung Hee University, Yongin-Si 446-701, Republic of Korea.
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19
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Li D, Li B, Lee G, Yang SI. Facile Synthesis of Fluorescent Silver Nanoclusters as Simultaneous Detection and Remediation for Hg2+. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10294] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Dan Li
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
| | - Biao Li
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
| | - Goeun Lee
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry; Kyung Hee University; Yongin 449-701 Republic of Korea
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20
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Singh DK, Ganbold EO, Cho EM, Cho KH, Kim D, Choo J, Kim S, Lee CM, Yang SI, Joo SW. Detection of the mycotoxin citrinin using silver substrates and Raman spectroscopy. J Hazard Mater 2014; 265:89-95. [PMID: 24333945 DOI: 10.1016/j.jhazmat.2013.11.041] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Revised: 10/20/2013] [Accepted: 11/19/2013] [Indexed: 06/03/2023]
Abstract
We detected a trace amount of the mycotoxin citrinin using surface-enhanced Raman scattering (SERS) on silver nanoparticle (Ag NP) surfaces. The SERS substrate on hydrophobic Teflon films was also introduced to observe the citrinin peaks. A broad band at ∼1382cm(-1), which was ascribed to the symmetric carboxylate stretching mode, was observed in addition to an antisymmetric carboxylate stretching mode at ∼1568cm(-1) in the Raman spectra. The spectral feature indicated that citrinin would adsorb on Ag NPs via its carboxylate form. Based on density functional theory (DFT) calculations, vibrational mode analysis was performed to compare the Raman spectra of citrinin. DFT calculations also predicted that a bidentate bridge configuration through O15 and O16 atoms in citrinin would be the most stable on three Ag atoms. After treating with Ag NPs, observation of citrinin peaks was attempted in fungal cells of Penicillium citrinum. This work may provide useful insights into the direct observation of the hazardous citrinin mycotoxin using SERS by understanding its adsorption behaviors on Ag surfaces.
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Affiliation(s)
- Dheeraj K Singh
- Department of Chemistry, Soongsil University, Seoul 156-743, South Korea
| | | | - Eun-Min Cho
- College of Environment and Applied Chemistry, Kyung Hee University, Yongin 446-701, South Korea
| | - Kwang-Hwi Cho
- School of Systems Biomedical Science, Soongsil University, Sangdo-dong, Dongjak-gu, Seoul, South Korea
| | - Doseok Kim
- Department of Physics, Sogang University, Seoul 121-742, South Korea
| | - Jaebum Choo
- Department of Bionano Engineering, Hanyang University, Sa-1-dong 1271, Ansan 426-791, South Korea
| | - Sehun Kim
- Molecular-level Interface Research Center and Department of Chemistry, KAIST, Daejeon 305-701, South Korea
| | - Cheol Min Lee
- Institute of Environmental and Industrial Medicine, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea.
| | - Sung Ik Yang
- College of Environment and Applied Chemistry, Kyung Hee University, Yongin 446-701, South Korea.
| | - Sang-Woo Joo
- Department of Chemistry, Soongsil University, Seoul 156-743, South Korea.
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21
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Kwon JY, Lee SY, Koedrith P, Lee JY, Kim KM, Oh JM, Yang SI, Kim MK, Lee JK, Jeong J, Maeng EH, Lee BJ, Seo YR. Lack of genotoxic potential of ZnO nanoparticles in in vitro and in vivo tests. Mutat Res Genet Toxicol Environ Mutagen 2014; 761:1-9. [PMID: 24462964 DOI: 10.1016/j.mrgentox.2014.01.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 01/08/2014] [Accepted: 01/12/2014] [Indexed: 11/25/2022]
Abstract
The industrial application of nanotechnology, particularly using zinc oxide (ZnO), has grown rapidly, including products such as cosmetics, food, rubber, paints, and plastics. However, despite increasing population exposure to ZnO, its potential genotoxicity remains controversial. The biological effects of nanoparticles depend on their physicochemical properties. Preparations with well-defined physico-chemical properties and standardized test methods are required for assessing the genotoxicity of nanoparticles. In this study, we have evaluated the genotoxicity of four kinds of ZnO nanoparticles: 20nm and 70nm size, positively or negatively charged. Four different genotoxicity tests (bacterial mutagenicity assay, in vitro chromosomal aberration test, in vivo comet assay, and in vivo micronucleus test, were conducted, following Organization for Economic Cooperation and Development (OECD) test guidelines with good laboratory practice (GLP) procedures. No statistically significant differences from the solvent controls were observed. These results suggest that surface-modified ZnO nanoparticles do not induce genotoxicity in in vitro or in vivo test systems.
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Affiliation(s)
- Jee Young Kwon
- Department of Life Science, Institute of Environmental Medicine, Dongguk University, Seoul, South Korea; Department of Biomedical Science, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Seung Young Lee
- Korea Testing and Research Institute, Seoul, South Korea; College of Veterinary Medicine Chungbuk National University, Cheongju, Chungcheongbuk-do, South Korea
| | - Preeyaporn Koedrith
- Faculty of Environment and Resource Studies, Mahidol University, Phuttamonthon District, NakhonPathom 73170, Thailand
| | - Jong Yun Lee
- Korea Testing and Research Institute, Seoul, South Korea
| | - Kyoung-Min Kim
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo, South Korea
| | - Jae-Min Oh
- Department of Chemistry and Medical Chemistry, College of Science and Technology, Yonsei University, Wonju, Gangwondo, South Korea
| | - Sung Ik Yang
- Department of Applied Chemistry, Kyung Hee University, Yongin, South Korea
| | - Meyoung-Kon Kim
- Department of Biochemistry & Molecular Biology, Korea University College of Medicine, Seoul, South Korea
| | - Jong Kwon Lee
- Toxicological Research Division, National Institute of Food and Drug Safety Evaluation (NIFDS), Ministry of Food and Drug Safety (MFDS), Chungcheongbuk-do, South Korea
| | - Jayoung Jeong
- Toxicological Research Division, National Institute of Food and Drug Safety Evaluation (NIFDS), Ministry of Food and Drug Safety (MFDS), Chungcheongbuk-do, South Korea
| | - Eun Ho Maeng
- Korea Testing and Research Institute, Seoul, South Korea
| | - Beam Jun Lee
- College of Veterinary Medicine Chungbuk National University, Cheongju, Chungcheongbuk-do, South Korea
| | - Young Rok Seo
- Department of Life Science, Institute of Environmental Medicine, Dongguk University, Seoul, South Korea.
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22
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Cho EM, Singh DK, Ganbold EO, Dembereldorj U, Jang SW, Kim D, Choo J, Kim S, Lee CM, Yang SI, Joo SW. Interactions between the antifungal drug myclobutanil and gold and silver nanoparticles in Penicillium digitatum investigated by surface-enhanced Raman scattering. Appl Spectrosc 2014; 68:307-314. [PMID: 24666947 DOI: 10.1366/13-07084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Surface-enhanced Raman scattering (SERS) of an antifungal reagent, myclobutanil (MCB), was performed on Au and Ag nanoparticles (NPs) to estimate the drug-release behaviors in fungal cells. A density functional theory (DFT) calculation was introduced to predict a favorable binding site of MCB to either the Ag or Au atom. Myclobutanil was presumed to bind more strongly to Au than to Ag in their most stable, optimized geometries of the N4 atom in its 1,2,4-triazole unit binding to the metal atom. Strong intensities were observed in the Ag SERS spectra only at acidic pH values, whereas the most prominent peaks in the Au SERS spectra of MCB matched quite well with those of 1,2,4-triazole regardless of pH conditions. The Raman spectral intensities of the MCB-assembled Ag and Au NPs decreased after treatment with either potato dextrose agar (PDA) or glutathione (GSH). Darkfield microscopy and confocal SERS were performed to analyze the MCB-assembled metal NPs inside Penicillium digitatum fungal cells. The results suggested that MCB was released from the metal NPs in the intracellular GSH in the fungi because we observed only fungal cell peaks.
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Affiliation(s)
- Eun-Min Cho
- Kyung Hee University, College of Environment and Applied Chemistry, Yongin 446-701, Republic of Korea
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23
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Abstract
We report on the selective and sensitive colorimetric detection of Ag+ in a dimethylformamide (DMF) solution in the presence of graphene oxide based on the surface plasmon resonance absorption of Ag nanoparticles (NPs).
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Affiliation(s)
- XiaoLiang Li
- Department of Applied Chemistry
- Kyung Hee University
- Yongin, Republic of Korea
| | - Yong Wu He
- Department of Applied Chemistry
- Kyung Hee University
- Yongin, Republic of Korea
| | - Jae Sung Ryu
- Department of Applied Chemistry
- Kyung Hee University
- Yongin, Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry
- Kyung Hee University
- Yongin, Republic of Korea
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24
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Singh DK, Ganbold EO, Cho EM, Lee CM, Yang SI, Joo SW. Tautomerism of a thiabendazole fungicide on Ag and Au nanoparticles investigated by Raman spectroscopy and density functional theory calculations. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.06.060] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Hwang HJ, Nam J, Yang SI, Kwon JH, Oh HB. MALDI-TOF Analysis of Polyhexamethylene Guanidine (PHMG) Oligomers Used as a Commercial Antibacterial Humidifier Disinfectant. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.6.1708] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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27
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Lee CM, Cho EM, Ochir EG, Dembereldorj U, Yang SI. Chemotaxonomic Raman Spectroscopy Investigation of Ascomycetes and Zygomycetes. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.4.1240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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28
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Lee CM, Cho EM, Yang SI, Ganbold EO, Jun J, Cho KH. Raman Spectroscopy and Density Functional Theory Calculations of β-Glucans and Chitins in Fungal Cell Walls. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.3.943] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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30
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31
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32
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Jeong YC, Park DG, Lee IS, Yang SI, Ahn KH. Highly fluorescent photochromic diarylethene with an excellent fatigue property. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b814040e] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Jeong YC, Kim SH, Ko H, Song K, Ahn KH, Yang SI. Photochromic optical memory based on non-destructive IR read-out. Photochem Photobiol Sci 2009; 8:1590-4. [DOI: 10.1039/b906891k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Yang SI, Kim KH, Kang D, Joo SW. Cis-to-trans photoconversion of azobenzene self-assembled monolayers on gold nanoparticle surfaces investigated by Raman spectroscopy. Photochem Photobiol Sci 2009; 8:31-3. [DOI: 10.1039/b808903e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Kwon JS, Jeon HB, Yang SI, Oh JJ, Joo SW. Adsorption of (S)–(+)–O-acetylmandelic acid on gold nanoparticle surfaces investigated by surface-enhanced Raman scattering. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.11.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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36
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37
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Jeong YC, Yang SI, Kim E, Ahn KH. A High-Content Diarylethene Photochromic Polymer for an Efficient Fluorescence Modulation. Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200600461] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Abstract
High fatigue-resistant photochromic dithienylethenes were synthesized by controlling the oxidation state of 1,2-bis(2-methyl-1-benzothiophene-3-yl)perfluorocyclopentene (BTF6) and 1,2-bis(2,5-dimethylthien-3-yl)perfluorocyclopentene (DMTF6).
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Affiliation(s)
- Yong-Chul Jeong
- College of Environment and Applied Chemistry, and Institute of Natural Science, Kyung Hee University, Yongin 449-701, Republic of Korea
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39
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Abstract
A highly fluorescent diarylethene in the closed-ring form was synthesized by the oxidation of 1,2-bis(2-methyl-1-benzothiophene-3-yl)perfluorocyclopentene (BTF6).
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Affiliation(s)
- Yong-Chul Jeong
- College of Environment and Applied Chemistry, Institute of Natural Science, Kyung Hee University, Yongin, 449-701, South Korea
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40
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Cho HS, Ahn TK, Yang SI, Jin SM, Kim D, Kim SK, Kim HD. Singlet excited state (S1) of higher fullerenes C76 and C84: correlation between lifetime and HOMO–LUMO energy gap. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00845-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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41
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Kirmaier C, Yang SI, Prathapan S, Miller MA, Diers JR, Bocian DF, Lindsey JS, Holten D. Synthesis and excited-state photodynamics of perylene-porphyrin dyads. 4. Ultrafast charge separation and charge recombination between tightly coupled units in polar media. Res Chem Intermed 2002. [DOI: 10.1163/15685670260469384] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Affiliation(s)
- Evan T Powers
- Department of Chemistry and The Skaggs Institute of Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
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43
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44
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Abstract
Twelve 4-substituted cyclopenta[c]quinoline derivatives were synthesized and evaluated in vitro cytotoxicity against four human cancer cell lines (HOP62, SK-OV-3, MD-MB-468 and T-47D). The compounds 6c and 6e bearing p-anisidine and pyrrolidine side chain were more active than the others.
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Affiliation(s)
- H Lee
- College of Pharmacy, Chungbuk National University, Cheongju 361-763, Korea.
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45
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Yang SI, Prathapan S, Miller MA, Seth J, Bocian DF, Lindsey JS, Holten D. Synthesis and Excited-State Photodynamics in Perylene-Porphyrin Dyads 2. Effects of Porphyrin Metalation State on the Energy-Transfer, Charge-Transfer, and Deactivation Channels. J Phys Chem B 2001. [DOI: 10.1021/jp010336a] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sung Ik Yang
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, Department of Chemistry, Washington University, St. Louis, Missouri 63130-4899, and Department of Chemistry, University of California, Riverside, California 92521-0403
| | - Sreedharan Prathapan
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, Department of Chemistry, Washington University, St. Louis, Missouri 63130-4899, and Department of Chemistry, University of California, Riverside, California 92521-0403
| | - Mark A. Miller
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, Department of Chemistry, Washington University, St. Louis, Missouri 63130-4899, and Department of Chemistry, University of California, Riverside, California 92521-0403
| | - Jyoti Seth
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, Department of Chemistry, Washington University, St. Louis, Missouri 63130-4899, and Department of Chemistry, University of California, Riverside, California 92521-0403
| | - David F. Bocian
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, Department of Chemistry, Washington University, St. Louis, Missouri 63130-4899, and Department of Chemistry, University of California, Riverside, California 92521-0403
| | - Jonathan S. Lindsey
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, Department of Chemistry, Washington University, St. Louis, Missouri 63130-4899, and Department of Chemistry, University of California, Riverside, California 92521-0403
| | - Dewey Holten
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, Department of Chemistry, Washington University, St. Louis, Missouri 63130-4899, and Department of Chemistry, University of California, Riverside, California 92521-0403
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46
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Prathapan S, Yang SI, Seth J, Miller MA, Bocian DF, Holten D, Lindsey JS. Synthesis and Excited-State Photodynamics of Perylene−Porphyrin Dyads. 1. Parallel Energy and Charge Transfer via a Diphenylethyne Linker. J Phys Chem B 2001. [DOI: 10.1021/jp010335i] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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47
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Ik Yang S, Lammi RK, Prathapan S, Miller MA, Seth J, Diers JR, Bocian DF, Lindsey JS, Holten D. Synthesis and excited-state photodynamics of perylene–porphyrin dyads Part 3. Effects of perylene, linker, and connectivity on ultrafast energy transfer. ACTA ACUST UNITED AC 2001. [DOI: 10.1039/b102741g] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Bang OS, Park EK, Yang SI, Lee SR, Franke TF, Kang SS. Overexpression of Akt inhibits NGF-induced growth arrest and neuronal differentiation of PC12 cells. J Cell Sci 2001; 114:81-88. [PMID: 11112692 DOI: 10.1242/jcs.114.1.81] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
To investigate the role of Akt in nerve growth factor (NGF)-induced neuronal differentiation, PC12 cells ectopically expressing wild-type or dominant-inhibitory forms of Akt were analyzed. NGF-induced neurite outgrowth was greatly accelerated in cells expressing dominant-inhibitory Akt, compared to parental PC12 cells, but was almost completely blocked in cells expressing wild-type Akt. Since neuronal differentiation requires an arrest of cell growth, several aspects of cell growth of the different cell lines were compared. Cells expressing wild-type Akt were not susceptible to the growth-arresting effect of NGF, whereas parental PC12 cells and notably cells expressing mutant Akt were so affected. Accompanying this, the expressions of CDKs and p21(WAF1) were down- and up-regulated, respectively, in both parental PC12 cells and cells expressing mutant Akt. When treated with some growth arrest-inducing agents such as sodium nitroprusside, forskolin and butyrolactone I, cells expressing wild-type Akt regained their responsiveness to the effects of NGF on differentiation. In summary, our results indicate that Akt overrides the growth-arresting effect of NGF and thereby, negatively regulates neuronal differentiation.
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Affiliation(s)
- O S Bang
- Department of Biology, College of Natural Sciences, Kyungpook National University, Taegu 702-701, Korea
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49
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Lee H, Lee J, Hong SS, Yang SI, Jung SH, Jahng Y, Cho J. Synthesis and in vitro cytotoxicity of 2-alkylaminosubstituted quinoline derivatives. Arch Pharm Res 2000; 23:450-4. [PMID: 11059821 DOI: 10.1007/bf02976570] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Eight 2-alkylaminosubstituted 5,8-dimethoxy-4-methylquinolines and nine 2-alkylaminosubstituted or 2,6-disubstituted 4-methylquinoline-5,8-diones were synthesized and evaluated in vitro cytotoxicity against four human cancer cell lines (HOP62, SK-OV-3, HCT15 and SF295).
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Affiliation(s)
- H Lee
- College of Pharmacy, Chungbuk National University, Cheongju, Korea.
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50
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Mo HJ, Lee HC, Choi HS, Yang SI. Heat shock-induced, caspase-3-independent rapid breakdown of Akt and consequent alteration of its total phosphorylation/activity level. Biochem Biophys Res Commun 2000; 276:702-6. [PMID: 11027534 DOI: 10.1006/bbrc.2000.3524] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The immediate effect of a 15-min heat shock was examined on the level and the activity of Akt. Following heat shock, the Akt level decreased by 15-70% in a temperature-dependent and phosphorylation status-independent manner. This decrease of Akt level was not prevented by caspase inhibitors. At 48 degrees C, the extent of the breakdown was so immense that the total phosphorylation/activity level of Akt was not increased over the control level, implying that the total cellular activity of Akt governed by the level and the molar activity does not necessarily undergo the ensuing change.
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Affiliation(s)
- H J Mo
- Department of Pharmacology, College of Medicine, Konkuk University, 322 Danwol-dong, Chungju-city, Chungchongbuk-do, 380-701, Korea
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