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Hong SC, Hong CR, Kim M, Kang YJ, Jung YH, Park KM, Choi J, Chang PS. Process optimization for microfluidic preparation of liposomes using food-grade components. Food Chem 2024; 451:139437. [PMID: 38678653 DOI: 10.1016/j.foodchem.2024.139437] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 04/18/2024] [Accepted: 04/20/2024] [Indexed: 05/01/2024]
Abstract
This study explores the potential for optimizing a sustainable manufacturing process that maintains the essential characteristics of conventional liposomes using food-grade solvents and components. The focus was comparing the physicochemical, morphological, and interfacial properties of liposomes produced with these food-grade ingredients to those made by conventional methods. It was found that there was no significant difference in particle size (195.87 ± 1.40 nm) and ζ-potential (-45.13 ± 0.65 mV) between liposomes made from food-grade and conventional materials. The manufacturing process for liposomes, utilizing food-grade solvents and components, was optimized through the application of Plackett-Burman design and response surface methodology. This approach helped identify key parameters (soy lecithin, β-sitosterol, W/O ratio) and their optimal values (3.17 g, 0.25 g, 1:2.59). These findings suggest that it is possible to enhance the use of liposomes as an effective and safe delivery system in the food industry, adhering to the strict guidelines set by regulatory agencies.
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Affiliation(s)
- Sung-Chul Hong
- Department of Food Science and Biotechnology, Kunsan National University, Gunsan 54150, Republic of Korea
| | - Chi Rac Hong
- Department of Food Science and Technology, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
| | - Minsoo Kim
- Division of Fundamental Research on Public Agenda, Research Team for Transmission Dynamics of Infectious Diseases, National Institute for Mathematical Sciences, Daejeon 34047, Republic of Korea
| | - Yue Jai Kang
- Department of Aquatic Life Medicine, Kunsan National University, Gunsan 54150, Republic of Korea
| | - Young Hoon Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Kyung-Min Park
- Department of Food Science and Biotechnology, Wonkwang University, Iksan 54538, Republic of Korea
| | - Jaeyoung Choi
- Department of Oriental Medicine Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea.
| | - Pahn-Shick Chang
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea; Center for Food and Bioconvergence, Seoul National University, Seoul 08826, Republic of Korea; Center for Agricultural Microorganism and Enzyme, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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2
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Istianah N, Kang HJ, Lee YJ, Choe D, Jung SK, Hong SC, Jung YH. Enhancing the dispersibility of Gelidium amansii-derived microfibrillated cellulose through centrifugal fractionation. Int J Biol Macromol 2024; 262:129909. [PMID: 38368676 DOI: 10.1016/j.ijbiomac.2024.129909] [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: 10/06/2023] [Revised: 12/01/2023] [Accepted: 01/31/2024] [Indexed: 02/20/2024]
Abstract
Hydrothermal pretreatment is useful for microfibrillated cellulose (MFC) preparation due to its safety, but the remaining hemicellulose might affect MFC properties. This study aimed to investigate the effect of centrifugation time on hemicellulose removal and the physicochemical properties of MFC obtained after hydrothermal pretreatment and micro-fibrillation. In this study, centrifugation was applied to the MFC suspension at varying duration times. Composition analysis and Fourier transform infrared spectra indicated that fractionated MFC has no hemicellulose content after 10, 20, and 30 min centrifugation. It also showed an approximately 5 times higher than 0.5 % g/g of initial solid concentration, indicated by a lower gel concentration point, than unfractionated MFC. Scanning electron microscope images of the fractionated MFC for 30 min (MFC2C) presented thin, long cellulose fibrils of 517 nm in average diameter and 635-10,000 nm in length that induced a slower sedimentation rate. MFC2C dispersion was also improved by autoclave sterilization by regulating cellulose structure, rheology, and crystallinity. As a result, MFC dispersibility can be enhanced by removing hemicellulose through simple centrifugation.
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Affiliation(s)
- Nur Istianah
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea; Department of Food Science and Biotechnology, Universitas Brawijaya, Malang 65145, Indonesia
| | - Hye Jee Kang
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Yeon Ju Lee
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Deokyeong Choe
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sung Keun Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Sung-Chul Hong
- Department of Food Science and Biotechnology, Kunsan National University, Gunsan 54150, Republic of Korea
| | - Young Hoon Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea.
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3
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Alalhareth M, Hong SC. An Adaptive Intrusion Detection System in the Internet of Medical Things Using Fuzzy-Based Learning. Sensors (Basel) 2023; 23:9247. [PMID: 38005635 PMCID: PMC10674369 DOI: 10.3390/s23229247] [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] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/13/2023] [Accepted: 11/16/2023] [Indexed: 11/26/2023]
Abstract
The Internet of Medical Things (IoMT) is a growing trend within the rapidly expanding Internet of Things, enhancing healthcare operations and remote patient monitoring. However, these devices are vulnerable to cyber-attacks, posing risks to healthcare operations and patient safety. To detect and counteract attacks on the IoMT, methods such as intrusion detection systems, log monitoring, and threat intelligence are utilized. However, as attackers refine their methods, there is an increasing shift toward using machine learning and deep learning for more accurate and predictive attack detection. In this paper, we propose a fuzzy-based self-tuning Long Short-Term Memory (LSTM) intrusion detection system (IDS) for the IoMT. Our approach dynamically adjusts the number of epochs and utilizes early stopping to prevent overfitting and underfitting. We conducted extensive experiments to evaluate the performance of our proposed model, comparing it with existing IDS models for the IoMT. The results show that our model achieves high accuracy, low false positive rates, and high detection rates, indicating its effectiveness in identifying intrusions. We also discuss the challenges of using static epochs and batch sizes in deep learning models and highlight the importance of dynamic adjustment. The findings of this study contribute to the development of more efficient and accurate IDS models for IoMT scenarios.
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Affiliation(s)
- Mousa Alalhareth
- Department of Information Systems, College of Computer Science and Information System, Najran University, Najran 61441, Saudi Arabia
- Department of Computer and Information Sciences, Towson University, Towson, MD 21204, USA
| | - Sung-Chul Hong
- Department of Computer and Information Sciences, Towson University, Towson, MD 21204, USA
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Hong CR, Lee EH, Jung YH, Lee JH, Paik HD, Hong SC, Choi SJ. Development and Characterization of Inula britannica Extract-Loaded Liposomes: Potential as Anti-Inflammatory Functional Food Ingredients. Antioxidants (Basel) 2023; 12:1636. [PMID: 37627631 PMCID: PMC10451523 DOI: 10.3390/antiox12081636] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/04/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
We investigated the potential of Inula britannica extract encapsulated in liposomes as a functional food ingredient with enhanced bioavailability and stability. Inula britannica, known for its anti-inflammatory properties and various health benefits, was encapsulated using a liposome mass production manufacturing method, and the physical properties of liposomes were evaluated. The liposomes exhibited improved anti-inflammatory effects in lipopolysaccharide-activated RAW 264.7 macrophages, suppressing the production of pro-inflammatory mediators such as nitric oxide and prostaglandin E2 and downregulating the expression of iNOS and COX-2 transcription factors. Additionally, we observed reduced production of pro-inflammatory cytokines TNF-α, IL-6, and IL-1β, and modulation of the NF-κB and mitogen-activated protein kinase signaling pathways. These findings suggest that Inula britannica extract encapsulated in liposomes could serve as a valuable functional food ingredient for managing and preventing inflammation-related disorders, making it a promising candidate for incorporation into various functional food products. The enhanced absorption and stability provided by liposomal encapsulation can enable better utilization of the extract's beneficial properties, promoting overall health and well-being.
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Affiliation(s)
- Chi Rac Hong
- Department of Food Science and Technology, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea;
| | - Eun Ha Lee
- Smart Farm Research Center, Korea Institute of Science and Technology, Gangneung 25451, Republic of Korea;
| | - Young Hoon Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea;
| | - Ju-Hoon Lee
- Department of Food and Animal Biotechnology, Research Institute of Agriculture and Life Science, Seoul National University, Seoul 08826, Republic of Korea;
| | - Hyun-Dong Paik
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 05029, Republic of Korea;
| | - Sung-Chul Hong
- Department of Food Science and Biotechnology, Kunsan National University, Gunsan 54150, Republic of Korea
| | - Seung Jun Choi
- Department of Food Science and Technology, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea;
- Center for Functional Biomaterials, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
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Subpiramaniyam S, Hong SC, Yi PI, Jang SH, Suh JM, Jung ES, Park JS, Palanivel V, Song YC, Cho LH, Park YH, Kim JS. Biochemical responses and phytoremediation potential of Azolla imbricata (Roxb.) Nakai in water and nutrient media exposed to waste metal cutting fluid along with temperature and humidity stress. J Hazard Mater 2023; 451:131101. [PMID: 36878030 DOI: 10.1016/j.jhazmat.2023.131101] [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] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 02/04/2023] [Accepted: 02/26/2023] [Indexed: 06/18/2023]
Abstract
Phytoremediation of metals from water (WM) and nutrient (NM) media exposed to waste metal cutting fluid (WMCF) along with temperature (T) and humidity (H) stress was tested using Azolla imbricata (Roxb.) Nakai. In the absence of WMCF, biomass was higher in NM than in WM during all tests. Surprisingly, opposite results were noted in the presence of WMCF, with growth failing at exposure to > 0.1% and > 0.5% in NM and WM, respectively. Further, correlation analysis of the growth data following WM exposure revealed that biomass was affected positively by T and negatively by H and metal accumulation. Simultaneously, metal accumulation was affected negatively by T and positively by H. The average accumulations of Al, Cd, Cr, Fe, Pb, and Zn across all T/H tests were 540, 282, 71, 1645, 2494 and 1110 mg·kg-1, respectively. The observed bioconcentration factor indicated that A. imbricata acts as a hyperaccumulator or accumulator of Zn (>10) and as either accumulator (>1) or excluder (<1) of the other metals. Overall, the phytoremediation performance of A. imbricata in multi-metal-contaminated WMCF was high in WM under all environmental conditions. Therefore, the use of WM is an economically feasible approach for the removal of metals from WMCF.
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Affiliation(s)
- Sivakumar Subpiramaniyam
- Department of Bioenvironmental Energy, College of Natural Resource and Life Sciences, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea.
| | - Sung-Chul Hong
- Department of Bioenvironmental Energy, College of Natural Resource and Life Sciences, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Pyong-In Yi
- Department of Bioenvironmental Energy, College of Natural Resource and Life Sciences, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Seong-Ho Jang
- Department of Bioenvironmental Energy, College of Natural Resource and Life Sciences, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Jeong-Min Suh
- Department of Bioenvironmental Energy, College of Natural Resource and Life Sciences, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Eun-Sang Jung
- Department of Bioenvironmental Energy, College of Natural Resource and Life Sciences, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Je-Sung Park
- Department of Bioenvironmental Energy, College of Natural Resource and Life Sciences, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Velmurugan Palanivel
- Centre for Materials Engineering and Regenerative Medicine, Bharath Institute of Higher Education and Research, Selaiyur, Chennai 600073, Tamil Nadu, India
| | - Young-Chae Song
- Major in Environmental Engineering, Korea Maritime and Ocean University, Busan 49112, Republic of Korea
| | - Lae-Hyeon Cho
- Department of Plant Bioscience, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Young-Hoon Park
- Department of Horticultural Bioscience, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do 50463, Republic of Korea
| | - Ji-Suk Kim
- Jungbu Parks and Landscape Management Office, Samil-daero, Jung-gu, Seoul 04628, Republic of Korea
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Alalhareth M, Hong SC. An Improved Mutual Information Feature Selection Technique for Intrusion Detection Systems in the Internet of Medical Things. Sensors (Basel) 2023; 23:4971. [PMID: 37430886 DOI: 10.3390/s23104971] [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: 04/01/2023] [Revised: 05/16/2023] [Accepted: 05/16/2023] [Indexed: 07/12/2023]
Abstract
In healthcare, the Internet of Things (IoT) is used to remotely monitor patients and provide real-time diagnoses, which is referred to as the Internet of Medical Things (IoMT). This integration poses a risk from cybersecurity threats that can harm patient data and well-being. Hackers can manipulate biometric data from biosensors or disrupt the IoMT system, which is a major concern. To address this issue, intrusion detection systems (IDS) have been proposed, particularly using deep learning algorithms. However, developing IDS for IoMT is challenging due to high data dimensionality leading to model overfitting and degraded detection accuracy. Feature selection has been proposed to prevent overfitting, but the existing methods assume that feature redundancy increases linearly with the size of the selected features. Such an assumption does not hold, as the amount of information a feature carries about the attack pattern varies from feature to feature, especially when dealing with early patterns, due to data sparsity that makes it difficult to perceive the common characteristics of selected features. This negatively affects the ability of the mutual information feature selection (MIFS) goal function to estimate the redundancy coefficient accurately. To overcome this issue, this paper proposes an enhanced feature selection technique called Logistic Redundancy Coefficient Gradual Upweighting MIFS (LRGU-MIFS) that evaluates candidate features individually instead of comparing them with common characteristics of the already-selected features. Unlike the existing feature selection techniques, LRGU calculates the redundancy score of a feature using the logistic function. It increases the redundancy value based on the logistic curve, which reflects the nonlinearity of the relationship of the mutual information between features in the selected set. Then, the LRGU was incorporated into the goal function of MIFS as a redundancy coefficient. The experimental evaluation shows that the proposed LRGU was able to identify a compact set of significant features that outperformed those selected by the existing techniques. The proposed technique overcomes the challenge of perceiving common characteristics in cases of insufficient attack patterns and outperforms existing techniques in identifying significant features.
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Affiliation(s)
- Mousa Alalhareth
- Department of Information Systems, College of Computer Science and Information System, Najran University, Najran 61441, Saudi Arabia
- Department of Computer and Information Sciences, Towson University, Towson, MD 21204, USA
| | - Sung-Chul Hong
- Department of Computer and Information Sciences, Towson University, Towson, MD 21204, USA
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Park YJ, Kwon DY, Koo SY, Truong TQ, Hong SC, Choi J, Moon J, Kim SM. Identification of drought-responsive phenolic compounds and their biosynthetic regulation under drought stress in Ligularia fischeri. Front Plant Sci 2023; 14:1140509. [PMID: 36860897 PMCID: PMC9968736 DOI: 10.3389/fpls.2023.1140509] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Ligularia fischeri, a leafy edible plant found in damp shady regions, has been used as an herbal medicine and is also consumed as a horticultural crop. In this study, we investigated the physiological and transcriptomic changes, especially those involved in phenylpropanoid biosynthesis, induced by severe drought stress in L. fischeri plants. A distinguishing characteristic of L. fischeri is a color change from green to purple due to anthocyanin biosynthesis. We chromatographically isolated and identified two anthocyanins and two flavones upregulated by drought stress using liquid chromatography-mass spectrometry and nuclear magnetic resonance analyses in this plant for the first time. In contrast, all types of caffeoylquinic acids (CQAs) and flavonol contents were decreased under drought stress. Further, we performed RNA sequencing to examine the molecular changes in these phenolic compounds at the transcriptome level. In an overview of drought-inducible responses, we identified 2,105 hits for 516 distinct transcripts as drought-responsive genes. Moreover, differentially expressed genes (DEGs) associated with phenylpropanoid biosynthesis accounted for the greatest number of both up- and downregulated DEGs by Kyoto Encyclopedia of Genes and Genomes enrichment analysis. We identified 24 meaningful DEGs based on the regulation of phenylpropanoid biosynthetic genes. Potential drought-responsive genes included upregulated flavone synthase (LfFNS, TRINITY DN31661 c0 g1 i1) and anthocyanin 5-O-glucosyltransferase (LfA5GT1, TRINITY DN782 c0 g1 i1), which could contribute to the high levels of flavones and anthocyanins under drought stress in L. fischeri. In addition, the downregulated shikimate O-hydroxycinnamolytransferase (LfHCT, TRINITY DN31661 c0 g1 i1) and hydroxycinnamoyl-CoA quinate/shikimate transferase (LfHQT4, TRINITY DN15180 c0 g1 i1) genes led to a reduction in CQAs. Only one or two BLASTP hits for LfHCT were obtained for six different Asteraceae species. It is possible that the HCT gene plays a crucial role in CQAs biosynthesis in these species. These findings expand our knowledge of the response mechanisms to drought stress, particularly regarding the regulation of key phenylpropanoid biosynthetic genes in L. fischeri.
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Affiliation(s)
- Yun Ji Park
- Smart Farm Research Center, KIST Gangneung Institute of Natural Products, Gangneung, Republic of Korea
| | | | - Song Yi Koo
- Natural Product Informatics Center, KIST Gangneung Institute of Natural Products, Gangneung, Republic of Korea
| | - To Quyen Truong
- Smart Farm Research Center, KIST Gangneung Institute of Natural Products, Gangneung, Republic of Korea
- Department of Bio-medical Science & Technology, Korea Institute of Science and Technology (KIST) School, University of Science and Technology, Seoul, Republic of Korea
| | - Sung-Chul Hong
- Smart Farm Research Center, KIST Gangneung Institute of Natural Products, Gangneung, Republic of Korea
| | - Jaeyoung Choi
- Smart Farm Research Center, KIST Gangneung Institute of Natural Products, Gangneung, Republic of Korea
| | - Jinyoung Moon
- Smart Farm Research Center, KIST Gangneung Institute of Natural Products, Gangneung, Republic of Korea
| | - Sang Min Kim
- Smart Farm Research Center, KIST Gangneung Institute of Natural Products, Gangneung, Republic of Korea
- Department of Bio-medical Science & Technology, Korea Institute of Science and Technology (KIST) School, University of Science and Technology, Seoul, Republic of Korea
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Oh SB, Park DH, Hong SC. Selective Fluorescence Staining of Microplastic in Water Utilizing Nile Red/surfactant Combination. pk 2022. [DOI: 10.7317/pk.2022.46.6.827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Subpiramaniyam S, Hong SC, Yi PI, Jang SH, Suh JM, Jung ES, Park JS, Cho LH. Influence of sawdust addition on the toxic effects of cadmium and copper oxide nanoparticles on Vigna radiata seeds. Environ Pollut 2021; 289:117311. [PMID: 34015691 DOI: 10.1016/j.envpol.2021.117311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/07/2021] [Revised: 04/09/2021] [Accepted: 05/01/2021] [Indexed: 06/12/2023]
Abstract
Studies in the literature concern the toxicity of nanoparticles either in a Petri dish or in agar media-based tests. Therefore, for environmental relevance, individual and binary mixtures of metal oxide nanoparticles (M-NPs) cadmium oxide (CdO-NP) and copper oxide (CuO-NP) were tested in this study for their effect on Vigna radiata in soil with and without the addition of sawdust. Seed germination was 67% in 100 mg CuO-NP in soil without sawdust. Seeds failed to germinate in 100 mg CdO +100 mg CuO-NPs in soil without the addition of sawdust and germination was 83% at the same concentration in soil with sawdust. In sawdust added to soil, when compared with control (soil without M-NPs), the maximum reduction in shoot (82%) and root (80%) length and wet (61%) and dry (54%) weight of plant was recorded in CdO-NP treated soil. Similarly, compared with control (soil without sawdust and M-NPs), the percent reduction in shoot (61%) and root (70%) length and wet (44%) and dry (48%) weight was highest in CdO-NP treated soil not supplemented with sawdust. In a binary mixture test (CdO-NP + CuO-NP), the addition of sawdust promoted the above plant growth parameters compared with individual CdO-NP and CuO-NP tests. Cadmium (511 mg kg-1 for individual and 303 mg kg-1 for binary mixture tests) and Cu (953 mg kg-1 for individual and 2954 mg kg-1 for binary mixture tests) accumulation was higher in plants grown in soil without sawdust. The beneficial effect of sawdust addition was observed in seed germination, plant growth, and metal accumulation. With or without sawdust, the binary mixture of CdO and CuO was antagonistic. These results indicate that sawdust can prevent M-NP-induced toxicity and reduce metal accumulation in plant tissues.
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Affiliation(s)
- Sivakumar Subpiramaniyam
- Department of Bioenvironmental Energy, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea.
| | - Sung-Chul Hong
- Department of Bioenvironmental Energy, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Pyong-In Yi
- Department of Bioenvironmental Energy, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Seong-Ho Jang
- Department of Bioenvironmental Energy, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Jeong-Min Suh
- Department of Bioenvironmental Energy, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Eun-Sang Jung
- Department of Bioenvironmental Energy, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Je-Sung Park
- Department of Bioenvironmental Energy, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Lae-Hyeon Cho
- Department of Plant Bioscience, College of Natural Resources and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
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Kim J, Hong SC, Lee EH, Lee JW, Yang SH, Kim JC. Preventive Effect of M. cochinchinensis on Melanogenesis via Tyrosinase Activity Inhibition and p-PKC Signaling in Melan-A Cell. Nutrients 2021; 13:3894. [PMID: 34836147 PMCID: PMC8623224 DOI: 10.3390/nu13113894] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/23/2021] [Accepted: 10/27/2021] [Indexed: 11/16/2022] Open
Abstract
Whitening research is of particular interest in the cosmetics market. The main focus of whitening research is on melanogenesis inhibition through tyrosinase activity. The mechanism of melanogenesis is involved with tyrosinase activity and p-PKC signaling. In this study, we used Momordica cochinchinensis (Lour.) spreng, a tropical fruit found throughout Southeast Asia, to investigate the inhibitory effect of melanogenesis. M. cochinchinensis contains a high concentration of polyphenols, flavonoids, and unsaturated fatty acids, which might be related to antioxidant activity. This study aimed to determine whether M. cochinchinensis extracts inhibit melanin synthesis in melan-A cells by inhibiting tyrosinase activity and p-PKC signaling. M. cochinchinensis was divided into pulp and aril and extracted under various conditions, and it was confirmed that all pulp and aril extracts have high contents of both phenols and flavonoids. Melan-A cells were treated with PMA for three days to induce melanin synthesis. After PMA treatment, M. cochinchinensis extracts were added to cultured media in a dose-dependent manner. Melanin contents and MTS were used to determine the amount of melanin in live cells. M. cochinchinensis extracts were evaluated for their effects on tyrosinase activity and p-PKC signaling pathways by Western blotting. It was found that M. cochinchinensis extract treatment decreased the amount of melanin and suppressed p-PKC expression. Additionally, tyrosinase activity was reduced after M. cochinchinensis extract treatment in a dose-dependent manner. Therefore, it was concluded that M. cochinchinensis could be used in antimelanogenesis and functional cosmetic materials to improve whitening.
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Affiliation(s)
- Juyong Kim
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea; (J.K.); (E.H.L.)
- Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Korea
| | - Sung-Chul Hong
- Smart Farm Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea;
| | - Eun Ha Lee
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea; (J.K.); (E.H.L.)
| | - Jae Wook Lee
- Natural Product Research Center, Korea Institute of Science and Technology (KIST), Gnagneung 25451, Korea;
| | - Seung-Hoon Yang
- Department of Medical Biotechnology, College of Life Science and Biotechnology, Dongguk University, Seoul 04620, Korea
| | - Jin-Chul Kim
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea; (J.K.); (E.H.L.)
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Park JS, Kim DE, Hong SC, Kim SY, Kwon HC, Hyun CG, Choi J. Genome Analysis of Streptomyces nojiriensis JCM 3382 and Distribution of Gene Clusters for Three Antibiotics and an Azasugar across the Genus Streptomyces. Microorganisms 2021; 9:microorganisms9091802. [PMID: 34576698 PMCID: PMC8466323 DOI: 10.3390/microorganisms9091802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/18/2021] [Revised: 08/15/2021] [Accepted: 08/18/2021] [Indexed: 11/29/2022] Open
Abstract
Streptomyces spp. have been major contributors of novel natural products that are used in many application areas. We found that the nojirimycin (NJ) producer JCM 3382 has antimicrobial activity against Staphylococcus aureus via cellular degradation. Genome analysis revealed 30 biosynthetic gene clusters, including those responsible for producing antibiotics, including an azasugar NJ. In-depth MS/MS analysis confirmed the production of 1-deoxynojirimycin (DNJ) along with NJ. In addition, the production of tambromycins, setomimycin, and linearmycins was verified by spectroscopic analyses, including LC-MS and NMR. The distribution of the clusters of genes coding for antibiotics in 2061 Streptomyces genomes suggested potential producers of tambromycin, setomimycin, and linearmycin. For a DNJ gene cluster, homologs of gabT1 and gutB1 were commonly found; however, yktC1 was identified in only 112 genomes. The presence of several types of clusters suggests that different strains may produce different types of azasugars. Chemical-profile-inspired comparative genome analysis may facilitate a more accurate assessment of the biosynthetic potential to produce secondary metabolites.
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Affiliation(s)
- Jin-Soo Park
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Korea; (J.-S.P.); (D.-E.K.); (S.-C.H.); (H.C.K.)
| | - Da-Eun Kim
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Korea; (J.-S.P.); (D.-E.K.); (S.-C.H.); (H.C.K.)
| | - Sung-Chul Hong
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Korea; (J.-S.P.); (D.-E.K.); (S.-C.H.); (H.C.K.)
| | - Seung-Young Kim
- Department of Pharmaceutical Engineering & Biotechnology, Sunmoon University, Chungnam 31460, Korea;
| | - Hak Cheol Kwon
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Korea; (J.-S.P.); (D.-E.K.); (S.-C.H.); (H.C.K.)
| | - Chang-Gu Hyun
- Department of Chemistry and Cosmetics, Jeju National University, Jeju 63243, Korea
- Correspondence: (C.-G.H.); (J.C.)
| | - Jaeyoung Choi
- Smart Farm Research Center, Korea Institute of Science and Technology, Gangneung 25451, Korea
- Correspondence: (C.-G.H.); (J.C.)
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12
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Suh MJ, Park JA, Ko H, Kang M, Kim J, Lee J, Kim J, Baek S, Lee KH, Hong SC, Kang JW. Is Body Mass Index Related to Skin Reactivity to Histamine but not to Specific Allergens? A 2-Year Follow-up Study on Korean Children. Am J Rhinol Allergy 2021; 36:142-148. [PMID: 34287086 DOI: 10.1177/19458924211032469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Skin prick tests are widely used to diagnose allergic sensitization. The influence of obesity on the skin prick test result has not been clearly established, even though the association between allergic disease and obesity is relatively well known. OBJECTIVE To determine whether a change in body mass index (BMI) contributes to skin reactivity to histamine and allergens in a skin prick test, we performed a 2-year follow-up study on Korean children. METHODS Skin prick tests for common aeroallergens were performed on elementary school students from Jeju Island, Korea. BMI was calculated using weight and height after measuring both, and demographic characteristics were surveyed. The same tests were repeated after 2 years. RESULTS The sensitization rate increased during the 2 years between tests and the children's mean BMI also increased, along with their age. The wheal sizes induced by Dermatophagoides pteronyssinus, Dermatophagoides farinae, Japanese cedar, and histamine were significantly increased during 2 years; however, only the histamine reaction associated with increased BMI had statistical significance. Furthermore, other variables-including the number of sensitized allergens-were not related to histamine skin reactivity. CONCLUSION Histamine skin reactivity increased in children over time and some allergens showed increased specific reactions; however, BMI gain is a specific predictor of histamine reactivity. Further studies are needed to elucidate the clinical significance of these changes.
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Affiliation(s)
- Michelle J Suh
- Department of Otorhinolaryngology, 37984Jeju National University College of Medicine, Jeju, Republic of Korea.,The Environmental Health Center (Atopic Dermatitis and Allergic Rhinitis), Jeju National University College of Medicine, Jeju Republic of Korea
| | - Jin A Park
- Department of Otorhinolaryngology, 37984Jeju National University College of Medicine, Jeju, Republic of Korea
| | - Hyekyung Ko
- Department of Medicine, Jeju National University College of Medicine, Jeju, Republic of Korea
| | - Minji Kang
- Department of Medicine, Jeju National University College of Medicine, Jeju, Republic of Korea
| | - Junhyeong Kim
- Department of Medicine, Jeju National University College of Medicine, Jeju, Republic of Korea
| | - Jiin Lee
- Department of Medicine, Jeju National University College of Medicine, Jeju, Republic of Korea
| | - Jueun Kim
- Department of Medicine, Jeju National University College of Medicine, Jeju, Republic of Korea
| | - Seungjae Baek
- Department of Medicine, Jeju National University College of Medicine, Jeju, Republic of Korea
| | - Keun-Hwa Lee
- Department of Microbiology, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - Sung-Chul Hong
- The Environmental Health Center (Atopic Dermatitis and Allergic Rhinitis), Jeju National University College of Medicine, Jeju Republic of Korea
| | - Ju Wan Kang
- Department of Otorhinolaryngology, Gangnam Severance Hospital,Yonsei University College of Medicine, Seoul, Republic of Korea
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13
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Subpiramaniyam S, Boovaragamoorthy GM, Kaliannan T, Krishna K, Hong SC, Yi PI, Jang SH, Suh JM. Assessment of foliar dust deposition and elemental concentrations in foliar dust and long rows of grand tamarind leaves along two major roads of Coimbatore, India. Chemosphere 2021; 264:128444. [PMID: 33010630 DOI: 10.1016/j.chemosphere.2020.128444] [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] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/09/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
In this study, the concentration of foliar dust and 23 elemental concentrations in foliar dust and foliar tissues were studied using long rows of grand tamarind trees grown in two major roads in Coimbatore, India. Twenty-four sampling sites were chosen and categorized as urban (n = 5), suburban (n = 14), and rural (n = 5) areas based on the local population. In the case of foliar dust concentration, a significant difference was noted between the sites of urban (range between 3.06 and 6.68 μ/cm2) and suburban areas (range between 0.56 and 5.75 μ/cm2) but not for rural areas (range between 0.40 and 0.47 μ/cm2). When comparing the urban, suburban, and rural, either significantly or insignificantly, 17 elements (Al, Ba, Bi, Ca, Cd, Co, Cu, Fe, Ga, In, K, Mg, Mn, Ni, Sr, and Zn) in urban and five elements (Ag, B, Cr, Na, and Pb) in suburban were higher. However, in the case of elements in tamarind laves, almost all elements except Na and K were higher in the urban area. Furthermore, the study results suggest that the elements in both foliage dust and in tamarind leaves are not evenly distributed between the sites of urban, suburban, and rural areas. This uneven distribution might be due to the construction being performed on a stretch of a four-lane highway during sampling, heavy transportation in three small junctions of suburban sites, and a rail over-bridge construction in one suburban site. However, comprehensive studies are needed to confirm this conclusion.
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Affiliation(s)
- Sivakumar Subpiramaniyam
- Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea.
| | | | - Thamaraiselvi Kaliannan
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli, 620 024, Tamil Nadu, India
| | - Kadirvelu Krishna
- DRDO-BU Center for Life Sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India
| | - Sung-Chul Hong
- Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Pyong-In Yi
- Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Seong-Ho Jang
- Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
| | - Jeong-Min Suh
- Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, Gyeongsangnam-do, 50463, Republic of Korea
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14
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Hong SC, Ha JH, Lee JK, Jung SH, Kim JC. In Vivo Anti-Inflammation Potential of Aster koraiensis Extract for Dry Eye Syndrome by the Protection of Ocular Surface. Nutrients 2020; 12:nu12113245. [PMID: 33113960 PMCID: PMC7690718 DOI: 10.3390/nu12113245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/16/2020] [Accepted: 10/17/2020] [Indexed: 12/18/2022] Open
Abstract
Dry eye syndrome (DES) is a corneal disease often characterized by an irritating, itching feeling in the eyes and light sensitivity. Inflammation and endoplasmic reticulum (ER) stress may play a crucial role in the pathogenesis of DES, although the underlying mechanism remains elusive. Aster koraiensis has been used traditionally as an edible herb in Korea. It has been reported to have wound-healing and inhibitory effects against insulin resistance and inflammation. Here, we examined the inhibitory effects of inflammation and ER stress by A. koraiensis extract (AKE) in animal model and human retinal pigmented epithelial (ARPE-19) cells. Oral administration of AKE mitigated DE symptoms, including reduced corneal epithelial thickness, increased the gap between lacrimal gland tissues in experimental animals and decreased tear production. It also inhibited inflammatory responses in the corneal epithelium and lacrimal gland. Consequently, the activation of NF-κB was attenuated by the suppression of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2). Moreover, AKE treatment ameliorated TNF-α-inducible ocular inflammation and thapsigargin (Tg)-inducible ER stress in animal model and human retinal pigmented epithelial (ARPE-19) cells. These results prove that AKE prevents detrimental functional and histological remodeling on the ocular surface and in the lacrimal gland through inhibition of inflammation and ER stress, suggesting its potential as functional food material for improvement of DES.
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Affiliation(s)
- Sung-Chul Hong
- Natural Informatics Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea;
| | - Jung-Heun Ha
- Research Center for Industrialization of Natural Neutralization, Dankook University, Cheonan 31116, Korea;
- Department of Food Science and Nutrition, Dankook University, Cheonan 31116, Korea
| | - Jennifer K. Lee
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA;
| | - Sang Hoon Jung
- Natural Product Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea;
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology (UST), Daejeon 34113, Korea
| | - Jin-Chul Kim
- Natural Informatics Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea;
- Correspondence: ; Tel.: +82-33-650-3515
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15
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Hong SC, Park KM, Hong CR, Kim JC, Yang SH, Yu HS, Paik HD, Pan CH, Chang PS. Microfluidic assembly of liposomes dual-loaded with catechin and curcumin for enhancing bioavailability. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124670] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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16
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Kim JY, Le TAN, Lee SY, Song DG, Hong SC, Cha KH, Lee JW, Pan CH, Kang K. 3,3'-Diindolylmethane Improves Intestinal Permeability Dysfunction in Cultured Human Intestinal Cells and the Model Animal Caenorhabditis elegans. J Agric Food Chem 2019; 67:9277-9285. [PMID: 31353906 DOI: 10.1021/acs.jafc.9b03039] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
3,3'-Diindolylmethane (DIM), a digestive metabolite originating from cruciferous vegetables, has dietary potential for the treatment of various human intestinal diseases. Although intestinal permeability dysfunction is closely related to the initiation and progression of human intestinal inflammatory diseases (IBDs), the effect of DIM on intestinal permeability is unclear. We evaluated the effect of DIM on the intestinal permeability of human intestinal cell monolayers and the animal model Caenorhabditis elegans, which were treated with IL-1β and Pseudomonas aeruginosa, respectively, to mimic IBD conditions. DIM substantially restored the intestinal permeability of differentiated Caco-2 cells by enhancing the expression of tight junction proteins (including occludin and ZO-1). Compared to the IL-1β single treatment (551.0 ± 49.0 Ω·cm2), DIM (10 μM) significantly increased the transepithelial electrical resistance (TEER) of Caco-2 cell monolayers (919.0 ± 66.4 Ω·cm2, p < 0.001). DIM also ameliorated the impaired intestinal permeability and extended the lifespan of C. elegans fed P. aeruginosa. The mean lifespan of DIM-treated worms (10.8 ± 1.3 days) was higher than that of control-treated worms (9.7 ± 1.1 days, p < 0.01). Thus, DIM is a potential nutraceutical candidate for the treatment of leaky gut syndrome by improving intestinal permeability.
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Affiliation(s)
- Joo Yeon Kim
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
| | - Tram Anh Ngoc Le
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
| | - So Young Lee
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
| | - Dae-Geun Song
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
| | - Sung-Chul Hong
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
| | - Kwang Hyun Cha
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
| | - Jae Wook Lee
- Natural Products Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
- Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology (UST) , Seoul 02792 , Republic of Korea
| | - Cheol-Ho Pan
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
- Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology (UST) , Seoul 02792 , Republic of Korea
| | - Kyungsu Kang
- Natural Product Informatics Research Center , Korea Institute of Science and Technology , Gangneung , Gangwon-do 25451 , Republic of Korea
- Division of Bio-Medical Science & Technology, KIST School , Korea University of Science and Technology (UST) , Seoul 02792 , Republic of Korea
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17
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Yang SH, Shin J, Shin NN, Hwang JH, Hong SC, Park K, Lee JW, Lee S, Baek S, Kim K, Cho I, Kim Y. A small molecule Nec-1 directly induces amyloid clearance in the brains of aged APP/PS1 mice. Sci Rep 2019; 9:4183. [PMID: 30862818 PMCID: PMC6414664 DOI: 10.1038/s41598-019-40205-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 02/12/2019] [Indexed: 12/18/2022] Open
Abstract
Alzheimer’s disease (AD) is a progressive neurodegenerative disorder characterized by the formation of toxic amyloid-β (Aβ) oligomers and plaques. Considering that Aβ misfolding and aggregation precedes the progressive development of cognitive impairment in AD, investigating a therapeutic means by clearance of pre-existing Aβ aggregates shows promise as a viable disease-modifying treatment. Here, we report that a small molecule, necrostatin-1 (Nec-1), reduces Aβ aggregates back to non-toxic monomers in vitro and in vivo. Intravenous administration of Nec-1 reduced the levels of Aβ plaques in the brains of aged APP/PS1 double transgenic mice. In addition, Nec-1 exhibited therapeutic effects against Aβ aggregates by inhibiting Aβ-induced brain cell death in neuronal and microglial cell lines. Nec-1 also showed anti-apoptotic and anti-necroptotic effects in the cortex of aged APP/PS1 mice by reducing levels of phosphorylated-RIPK3 and Bax and increasing the levels of Bcl-2. According to our data in vitro and in silico, the methyl group of the amine in the 2-thioxo-4-imidazolidinone is the key moiety of Nec-1 that directs its activity against aggregated Aβ. Given that the accumulation of Aβ aggregates is an important hallmark of AD, our studies provide strong evidence that Nec-1 may serve a key role in the development of AD treatment.
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Affiliation(s)
- Seung-Hoon Yang
- Department of Medical Biotechnology, College of Life Science and Biotechnology, Dongguk University, Seoul, 04620, Republic of Korea
| | - Jisu Shin
- Department of Pharmacy, Yonsei University, Incheon, 21983, Republic of Korea.,Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon, 21983, Republic of Korea
| | - Naewoo Neo Shin
- Integrated Science and Engineering Division, Yonsei University, Incheon, 21983, Republic of Korea
| | - Ji-Hyun Hwang
- Natural Product Informatics Research Center, Gangneung, 25451, Republic of Korea
| | - Sung-Chul Hong
- Natural Product Informatics Research Center, Gangneung, 25451, Republic of Korea
| | - Keunwan Park
- Natural Product Informatics Research Center, Gangneung, 25451, Republic of Korea
| | - Jae Wook Lee
- Natural Constituent Research Center, Korea Institute of Science and Technology, Gangneung, 25451, Republic of Korea
| | - Sejin Lee
- Department of Pharmacy, Yonsei University, Incheon, 21983, Republic of Korea.,Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon, 21983, Republic of Korea
| | - Seungyeop Baek
- Department of Pharmacy, Yonsei University, Incheon, 21983, Republic of Korea.,Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon, 21983, Republic of Korea.,Department of Biotechnology, Yonsei University, Incheon, 21983, Republic of Korea
| | - Kyeonghwan Kim
- Department of Pharmacy, Yonsei University, Incheon, 21983, Republic of Korea.,Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon, 21983, Republic of Korea
| | - Illhwan Cho
- Department of Pharmacy, Yonsei University, Incheon, 21983, Republic of Korea.,Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon, 21983, Republic of Korea
| | - YoungSoo Kim
- Department of Pharmacy, Yonsei University, Incheon, 21983, Republic of Korea. .,Yonsei Institute of Pharmaceutical Science, Yonsei University, Incheon, 21983, Republic of Korea. .,Integrated Science and Engineering Division, Yonsei University, Incheon, 21983, Republic of Korea.
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18
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Hummel T, Whitcroft KL, Andrews P, Altundag A, Cinghi C, Costanzo RM, Damm M, Frasnelli J, Gudziol H, Gupta N, Haehne A, Holbrook E, Hong SC, Hornung D, Hüttenbrink KB, Kamel R, Kobayashi M, Konstantinidis I, Landis BN, Leopold DA, Macchi A, Miwa T, Moesges R, Mullol J, Mueller CA, Ottaviano G, Passali GC, Philpott C, Pinto JM, Ramakrishnan VJ, Rombaux P, Roth Y, Schlosser RA, Shu B, Soler G, Stjärne P, Stuck BA, Vodicka J, Welge-Luessen A. Position paper on olfactory dysfunction. Rhinology 2018. [PMID: 29528615 DOI: 10.4193/rhino16.248] [Citation(s) in RCA: 373] [Impact Index Per Article: 62.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Background Olfactory dysfunction is an increasingly recognised condition, associated with reduced quality of life and major
health outcomes such as neurodegeneration and death. However, translational research in this field is limited by heterogeneity in methodological approach, including definitions of impairment, improvement and appropriate assessment techniques. Accordingly, effective treatments for smell loss are limited. In an effort to encourage high quality and comparable work in this field, among others, we propose the following ideas and recommendations. Whilst the full set of recommendations are outlined in the main document, points include the following:
• Patients with suspected olfactory loss should undergo a full examination of the head and neck, including rigid nasal endoscopy
with small diameter endoscopes.
• Subjective olfactory assessment should not be undertaken in isolation, given its poor reliability.
• Psychophysical assessment tools used in clinical and research settings should include reliable and validated tests of odour
threshold, and/or one of odour identification or discrimination.
• Comprehensive chemosensory assessment should include gustatory screening.
• Smell training can be helpful in patients with olfactory loss of several aetiologies. Conclusions We hope the current manuscript will encourage clinicians and researchers to adopt a common language, and in so doing, increase the methodological quality, consistency and generalisability of work in this field.
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19
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Taivansaikhan P, Tsevelmaa T, Rhim SH, Hong SC, Odkhuu D. Inducing and manipulating magnetization in 2D zinc-oxide by strain and external voltage. J Phys Condens Matter 2018; 30:145802. [PMID: 29485107 DOI: 10.1088/1361-648x/aab283] [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: 06/08/2023]
Abstract
Two-dimensional (2D) structures that exhibit intriguing magnetic phenomena such as perpendicular magnetic anisotropy and its switchable feature are of great interests in spintronics research. Herein, the density functional theory studies reveal the critical impacts of strain and external gating on vacancy-induced magnetism and its spin direction in a graphene-like single layer of zinc oxide (ZnO). In contrast to the pristine and defective ZnO with an O-vacancy, the presence of a Zn-vacancy induces significant magnetic moments to its first neighboring O and Zn atoms due to the charge deficit. We further predict that the direction of magnetization easy axis reverses from an in-plane to perpendicular orientation under a practically achievable biaxial compressive strain of only ~1-2% or applying an electric field by means of the charge density modulation. This magnetization reversal is mainly driven by the strain- and electric-field-induced changes in the spin-orbit coupled d states of the first-neighbor Zn atom to a Zn-vacancy. These findings open interesting prospects for exploiting strain and electric field engineering to manipulate magnetism and magnetization orientation of 2D materials.
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Affiliation(s)
- P Taivansaikhan
- Department of Physics, Incheon National University, Incheon 22012, Republic of Korea
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20
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Hummel T, Whitcroft KL, Andrews P, Altundag A, Cinghi C, Costanzo RM, Damm M, Frasnelli J, Gudziol H, Gupta N, Haehner A, Holbrook E, Hong SC, Hornung D, Hüttenbrink KB, Kamel R, Kobayashi M, Konstantinidis I, Landis BN, Leopold DA, Macchi A, Miwa T, Moesges R, Mullol J, Mueller CA, Ottaviano G, Passali GC, Philpott C, Pinto JM, Ramakrishnan VJ, Rombaux P, Roth Y, Schlosser RA, Shu B, Soler G, Stjärne P, Stuck BA, Vodicka J, Welge-Luessen A. Position paper on olfactory dysfunction. Rhinology 2017. [PMID: 28623665 DOI: 10.4193/rhin16.248] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Olfactory dysfunction is an increasingly recognised condition, associated with reduced quality of life and major health outcomes such as neurodegeneration and death. However, translational research in this field is limited by heterogeneity in methodological approach, including definitions of impairment, improvement and appropriate assessment techniques. Accordingly, effective treatments for smell loss are limited. In an effort to encourage high quality and comparable work in this field, among others, we propose the following ideas and recommendations. Whilst the full set of recommendations are outlined in the main document, points include the following: - Patients with suspected olfactory loss should undergo a full examination of the head and neck, including rigid nasal endoscopy with small diameter endoscopes. - Subjective olfactory assessment should not be undertaken in isolation, given its poor reliability. - Psychophysical assessment tools used in clinical and research settings should include reliable and validated tests of odour threshold, and/or one of odour identification or discrimination. - Comprehensive chemosensory assessment should include gustatory screening. - Smell training can be helpful in patients with olfactory loss of several aetiologies. CONCLUSIONS We hope the current manuscript will encourage clinicians and researchers to adopt a common language, and in so doing, increase the methodological quality, consistency and generalisability of work in this field.
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Affiliation(s)
- T Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - K L Whitcroft
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - P Andrews
- UCL Ear Institute, Faculty of Brain Sciences, University College London, London, UK
| | - A Altundag
- Department of Otorhinolaryngoglogy, Istanbul Surgery Hospital, Istanbul, Turkey
| | - C Cinghi
- Department of Otolaryngology; Eskisehir Osmangazi University, Istanbul, Turkey
| | - R M Costanzo
- Smell and Taste Disorders Center, Department of Otolaryngology Head and Neck Surgery, VCU School of Medicine, Richmond, VA, USA
| | - M Damm
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Cologne Medical Center, Cologne, Germany
| | - J Frasnelli
- Research Chair in Chemosensory Neuroanatomy, Department of Anatomy, Universite du Quebec a Trois-Rivieres, Trois-Rivieres, QC, Canada
| | - H Gudziol
- Department of Otorhinolaryngology, University of Jena, Jena, Germany
| | - N Gupta
- Department of Otorhinolaryngology, University College of Medical Sciences and GTB Hospital, Delhi, India
| | - A Haehner
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - E Holbrook
- Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - S C Hong
- Department of Otorhinolaryngology, Konkuk University Medical Center, Hwayang-dong, Gwangjin-gu, Seoul, South Korea
| | - D Hornung
- Dept. of Biology, St. Lawrence University, Canton, NY, USA
| | | | - R Kamel
- Department of Otorhinolaryngology, Cairo University, Cairo, Egypt
| | - M Kobayashi
- Department of Otorhinolaryngology-Head and Neck Surgery, Mie University Graduate School of Medicine, Mie, Japan
| | - I Konstantinidis
- Smell and Taste Clinic, Second Academic Otorhinolaryngology Department, Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - B N Landis
- Department for ENT, Head and Neck Surgery, Bern University Hospital, Bern, Switzerland
| | - D A Leopold
- Division of Otorhinolaryngology-Head and Neck Surgery, Department of Surgery, University of Vermont Medical Center, Burlington, Vermont, USA
| | - A Macchi
- ENT Clinic, University of Insubria, ASST, sette laghi, Varese, Italy
| | - T Miwa
- Department of Otorhinolaryngology, Kanazawa Medical University, Uchinada, Kahoku, Ishikawa, Japan
| | - R Moesges
- Institute of Medical Statistics, Informatics and Epidemiology, University Hospital of Cologne, Cologne, Germany
| | - J Mullol
- Rhinology Unit and Smell Clinic, IDIBAPS, University of Barcelona, Barcelona, Catalonia, Spain
| | - C A Mueller
- Department of Otorhinolaryngology, Medical University of Vienna, Vienna, Austria
| | - G Ottaviano
- Department of Neurosciences DNS, Otolaryngology Section, University, Padua, Italy
| | - G C Passali
- Head and Neck section, Department of Aging, Neurosciences, Head and Neck and Orthopedic; Catholic University of Sacred heart, A. Gemelli Hospital Foundation, Rome, Italy
| | - C Philpott
- Norwich Medical School, University of East Anglia, Norwich, UK
| | - J M Pinto
- Section of Otolaryngology-Head and Neck Surgery, The University of Chicago Medicine and Biological Sciences, Chicago, IL, USA
| | - V J Ramakrishnan
- Departments of Otolaryngology and Neurosurgery, University of Colorado, Aurora, CO, USA
| | - P Rombaux
- Universite Catholique de Louvain, Institute of Neurosciences, Unit of Otorhinolaryngology, Brussels, Belgium
| | - Y Roth
- The Institute for Nose and Sinus Therapy and Clinical Investigations, Department of Otolaryngology - Head and Neck Surgery, Edith Wolfson Medical Center, Tel Aviv University Sackler Faculty of Medicine, Holon, Israel
| | - R A Schlosser
- Department of Otolaryngology, Head and Neck Surgery, Medical Univeristy of South Carolina, Charleston, SC, USA
| | - B Shu
- Department of Otolaryngology, Taipei Veterans General Hospital, National Yang Ming University School of Medicine Faculty of Medicine, Taipei, Taiwan
| | - G Soler
- Division of Otorhinolaryngology, Area of Smell and Taste, Hospital de Clinicas, University of Buenos Aires, Buenos Aires City, Argentina
| | - P Stjärne
- Section of Rhinology, Department of Otorhinolaryngology, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden
| | - B A Stuck
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, University Duisburg-Essen, Germany
| | - J Vodicka
- Department of Otorhinolaryngology and Head and Neck Surgery, Hospital Pardubice, Faculty of Health Studies, University of Pardubice, Pardubice, Czech Republic
| | - A Welge-Luessen
- University Hospital Basel - Otorhinolaryngology, Basel, Switzerland
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Cho GJ, Ahn KH, Kim LY, Hwang SY, Hong SC, Oh MJ, Kim HJ. Effect of relative humidity on preeclampsia. CLIN EXP OBSTET GYN 2017; 44:264-267. [PMID: 29746035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE OF INVESTIGATION The authors aimed to determine the relationship between meteorological variables and hypertension in pregnancy by using data from a national weather database. MATERIALS AND METHODS For this population-based observational study, the database of the Korea National Health Insurance (KNHI) Claims of the Health Insurance Review and Assessment Service (HIRA) and Korea Meteorological Administration was used. The 48,275 women with preeclampsia among 2,495,383 women who gave birth were included. Monthly meteorological factors and preeclampsia prevalence for five years were statistically analyzed. RESULTS Among temperature, relative humidity, sunlight duration, and rainfall, only relative humidity had a significant inverse correlation with the preeclampsia prevalence (p < 0.001). The other meteorological factors were not associated with preeclampsia. CONCLUSION Relative humidity may be a significant factor for of the development of preeclampsia. Further monitoring of weather parameters during the entire pregnancy period may be the best method for verifying the present results in the development of preeclampsia.
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Hong SC, Agarwal S, Wong P, Fraser MA, Chen I, Singh SS. The Role of TAP Block in Ob/Gyn. J Minim Invasive Gynecol 2016; 22:S120. [PMID: 27678632 DOI: 10.1016/j.jmig.2015.08.337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- S C Hong
- MIS Unit, KK Women's and Children's Hospital, Singapore, Singapore
| | - S Agarwal
- Department of Obstetrics and Gynaecology, MIS Unit, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - P Wong
- Department of Anesthesiology, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - M A Fraser
- Department of Medical Imaging, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - I Chen
- Department of Obstetrics and Gynaecology, MIS Unit, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - S S Singh
- Department of Obstetrics and Gynaecology, MIS Unit, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
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Kim MS, Jo KI, Yeon JY, Kim JS, Kim KH, Jeon P, Hong SC. Association between Postprocedural Infarction and Antiplatelet Drug Resistance after Coiling for Unruptured Intracranial Aneurysms. AJNR Am J Neuroradiol 2016; 37:1099-105. [PMID: 27056423 DOI: 10.3174/ajnr.a4777] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 11/19/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND PURPOSE Procedure-related thromboembolism is a major limitation of coil embolization, but the relationship between thromboembolic infarction and antiplatelet resistance is poorly understood. The purpose of this study was to verify the association between immediate postprocedural thromboembolic infarction and antiplatelet drug resistance after endovascular coil embolization for unruptured intracranial aneurysm. MATERIALS AND METHODS This study included 338 aneurysms between October 2012 and March 2015. All patients underwent postprocedural MR imaging within 48 hours after endovascular coil embolization. Antiplatelet drug resistance was checked a day before the procedure by using the VerifyNow system. Abnormal antiplatelet response was defined as >550 aspirin response units and >240 P2Y12 receptor reaction units. In addition, we explored the optimal cutoff values of aspirin response units and P2Y12 receptor reaction units. The primary outcome was radiologic infarction based on postprocedural MR imaging. RESULTS Among 338 unruptured intracranial aneurysms, 134 (39.6%) showed diffusion-positive lesions on postprocedural MR imaging, and 32 (9.5%) and 105 (31.1%) had abnormal aspirin response unit and P2Y12 receptor reaction unit values, respectively. Radiologic infarction was associated with advanced age (65 years and older, P = .024) only with defined abnormal antiplatelet response (aspirin response units ≥ 550, P2Y12 receptor reaction units ≥ 240). P2Y12 receptor reaction unit values in the top 10th percentile (>294) were associated with radiologic infarction (P = .003). With this cutoff value, age (adjusted odds ratio, 2.29; 95% confidence interval, 1.28-4.08), P2Y12 receptor reaction units (>294; OR, 3.43; 95% CI, 1.53-7.71), and hyperlipidemia (OR, 2.05; 95% CI, 1.04-4.02) were associated with radiologic infarction in multivariate analysis. CONCLUSIONS Radiologic infarction after coiling for unruptured aneurysm was closely associated with age. Only very high P2Y12 receptor reaction unit values (>294) predicted postprocedural infarction. Further controlled studies are needed to determine the precise cutoff values, which could provide information regarding the optimal antiplatelet regimen for aneurysm coiling.
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Affiliation(s)
- M S Kim
- From the Departments of Neurosurgery (M.S.K., J.Y.Y., J.S.K., S.C.H.)
| | - K I Jo
- Department of Neurosurgery (K.I.J.), Hana General Hospital, Cheongju, Korea
| | - J Y Yeon
- From the Departments of Neurosurgery (M.S.K., J.Y.Y., J.S.K., S.C.H.)
| | - J S Kim
- From the Departments of Neurosurgery (M.S.K., J.Y.Y., J.S.K., S.C.H.)
| | - K H Kim
- Radiology (K.H.K., P.J.), Division of Interventional Neuroradiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - P Jeon
- Radiology (K.H.K., P.J.), Division of Interventional Neuroradiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S C Hong
- From the Departments of Neurosurgery (M.S.K., J.Y.Y., J.S.K., S.C.H.)
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Park JH, Lee DK, Lee MJ, Park C, Jung TY, Kim SK, Hong SC, Baek SJ, Lee JH. Estimating Climate Pollutants Emissions and Service Demands considering Socio-economic Change : Residential?Commercial Sector, Transportation Sector, Industrial Sector. ACTA ACUST UNITED AC 2015. [DOI: 10.15531/ksccr.2015.6.4.291] [Citation(s) in RCA: 1] [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: 11/17/2022]
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Park KM, Lee JH, Hong SC, Kwon CW, Jo M, Choi SJ, Kim K, Chang PS. Selective production of 1-monocaprin by porcine liver carboxylesterase-catalyzed esterification: Its enzyme kinetics and catalytic performance. Enzyme Microb Technol 2015; 82:51-57. [PMID: 26672448 DOI: 10.1016/j.enzmictec.2015.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 08/04/2015] [Accepted: 08/21/2015] [Indexed: 10/23/2022]
Abstract
Porcine liver carboxylesterase (PLE) belongs to carboxylesterase family (EC 3.1.1.1) as a serine-type esterase. The PLE-catalyzed esterification of capric acid with glycerol in reverse micelles was investigated on the catalytic performance and enzyme kinetics. The most suitable structure of reverse micelles was comprised of isooctane (reaction medium) and bis(2-ethylhexyl) sodium sulfosuccinate (AOT, anionic surfactant) with 0.1 of R-value ([water]/[surfactant]) and 3.0 of G/F-value ([glycerol]/[fatty acid]) for the PLE-catalyzed esterification. In the aspect of regio-selectivity, the PLE mainly produced 1-monocaprin without any other products (di- and/or tricaprins of subsequent reactions). Furthermore, the degree of esterification at equilibrium state (after 4 h from the initiation) was 62.7% under the optimum conditions at pH 7.0 and 60 °C. Based on Hanes-Woolf plot, the apparent Km and Vmax values were calculated to be 16.44 mM and 38.91 μM/min/mg protein, respectively.
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Affiliation(s)
- Kyung-Min Park
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Jong-Hyuk Lee
- Research Institute of Food and Biotechnology, SPC group, Seoul 137-887, Republic of Korea
| | - Sung-Chul Hong
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Chang Woo Kwon
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Minje Jo
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea
| | - Seung Jun Choi
- Department of Food Science and Technology, and Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea
| | - Keesung Kim
- Institute of Advanced Machinery and Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Pahn-Shick Chang
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, Republic of Korea; Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Republic of Korea.
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Hong SC, Park KM, Son YH, Jung HS, Kim K, Choi SJ, Chang PS. AOT/isooctane reverse micelles with a microaqueous core act as protective shells for enhancing the thermal stability of Chromobacterium viscosum lipase. Food Chem 2015; 179:263-9. [DOI: 10.1016/j.foodchem.2015.01.120] [Citation(s) in RCA: 10] [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] [Received: 10/31/2014] [Revised: 01/06/2015] [Accepted: 01/27/2015] [Indexed: 11/17/2022]
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Kim K, Kang DH, Kim MS, Kim KS, Park KM, Hong SC, Chang PS, Jung HS. Generation of alginate nanoparticles through microfluidics-aided polyelectrolyte complexation. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.02.029] [Citation(s) in RCA: 16] [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: 11/26/2022]
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Han SY, Ryu KJ, Ahn KH, Cho SB, Lee CH, Hong SC. Conservative treatment of uterine fistula with abdominal abscess after caesarean section. J OBSTET GYNAECOL 2014; 35:650-1. [PMID: 25496617 DOI: 10.3109/01443615.2014.987115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- S Y Han
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - K J Ryu
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - K H Ahn
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - S B Cho
- b Department of Radiology , College of Medicine, Korea University , Seoul , Republic of Korea
| | - C H Lee
- c Department of Science , University of Manitoba , Winnipeg , MB , Canada
| | - S C Hong
- a Department of Obstetrics and Gynecology , College of Medicine, Korea University , Seoul , Republic of Korea
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Taivansaikhan P, Odkhuu D, Kwon OR, Tsogbadrakh N, Hong SC. Magnetism and magnetocrystalline anisotropy of 3dtransition metal monolayers on Pt(001): a density-functional study. J Nanosci Nanotechnol 2014; 14:9011-9013. [PMID: 25971000 DOI: 10.1166/jnn.2014.10078] [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: 06/04/2023]
Abstract
We systematically investigate the effects of having Pt as a substrate and/or capping layer on the magnetism and magnetocrystalline anisotropy (MCA) of 3d transition metal (TMs; Cr, Mn, Fe, and Co) monolayers (MLs) by using a first-principles calculationl method. We found that Fe and Co MLs are ferromagnetic (FM) on a Pt(001) surface, but Mn and Cr MLs are antiferromagnetic (AFM). The magnetic moments are quite robust with additional Pt-capping. Furthermore, Pt-capping enhances the small perpendicular MCA (meV) of Fe/Pt(001) significantly to 4.44 meV. Our electronic structure analyses indicate that strong hybridization between Pt-5d and TM-3d orbitals plays a crucial role in determining magnetic ordering and MCA. For comparison we also calculated magnetism and MCA of 3d TM MLs on Ta(001) with and without Ta-capping.
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Shick AB, Hong SC, Maca F, Lichtenstein AI. Magnetic anisotropy energy and effective exchange interactions in Co intercalated graphene on Ir(1 1 1). J Phys Condens Matter 2014; 26:476003. [PMID: 25351898 DOI: 10.1088/0953-8984/26/47/476003] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The electronic structure, magnetic moments, effective exchange interaction parameter and the magnetic anisotropy energy of [monolayer Co]/Ir(1 1 1) and Co intercalated graphene on Ir(1 1 1) are studied making use of the first-principles density functional theory calculations. A large positive magnetic anisotropy of 1.24 meV/Co is found for [monolayer Co]/Ir(1 1 1), and a high Curie temperature of 1190 K is estimated. These findings show the Co/Ir(1 1 1) system is a promising candidate for perpendicular ultra-high density magnetic recording applications. The magnetic moments, exchange interactions and the magnetic anisotropy are strongly affected by graphene. Reduction of the magnetic anisotropy and the Curie temperature are found for graphene/[monolayer Co]/Ir(1 1 1). It is shown that for graphene placed in the hollow-hexagonal positions over the monolayer Co, the magnetic anisotropy remains positive, while for the placements with one of the C atoms on the top of Co it becomes negative. These findings may be important for assessing the use of graphene for magnetic recording and magnetoelectronic applications.
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Affiliation(s)
- A B Shick
- Institute of Physics ASCR, Na Slovance 2, 18221 Prague, Czech Republic
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Shin MR, Kang SK, Kim YS, Lee SY, Hong SC, Kim EC. TNF-α and LPS activate angiogenesis via VEGF and SIRT1 signalling in human dental pulp cells. Int Endod J 2014; 48:705-16. [PMID: 25311745 DOI: 10.1111/iej.12396] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 10/08/2014] [Indexed: 01/05/2023]
Abstract
AIM To assess whether SIRT1 and VEGF are responsible for tumour necrosis factor-α (TNF-α) and lipopolysaccharide (LPS)-induced angiogenesis and to examine the molecular mechanism(s) of action in human dental pulp cells (HDPCs). METHODOLOGY Immortalized HDPCs obtained from Prof. Takashi Takata (Hiroshima University, Japan) were treated with LPS (1 μg mL(-1) ) and TNF-α (10 ng mL(-1) ) for 24 h. mRNA and protein levels were examined by RT-PCR and Western blotting, respectively. Migration and tube formation were examined in human umbilical vein endothelial cells (HUVECs). The data were analysed by one-way anova. Statistical analysis was performed at α = 0.05. RESULTS LPS and TNF-α upregulated VEGF and SIRT1 mRNA and protein levels. Inhibition of SIRT1 activity by sirtinol and SIRT1 siRNA or inhibition of the VEGF receptor by CBO-P11 significantly attenuated LPS + TNF-α-stimulated MMPs production in HDPCs, as well as migration and tube formation in HUVECs (P < 0.05). Furthermore, sirtinol, SIRT1 siRNA and CBO-P11 attenuated phosphorylation of Akt, extracellular signal-regulated kinase (ERK), p38 and c-Jun N-terminal kinase (JNK) and the nuclear translocation of NF-κB p65. Pre-treatment with inhibitors of p38, ERK, JNK, PI3K and NF-κB decreased LPS + TNF-α-induced VEGF and SIRT1 expression, MMPs activity in HDPCs and angiogenesis (P < 0.05) in HUVECs. CONCLUSIONS TNF-α and LPS led to upregulation of VEGF and SIRT1, and subsequent upregulation of MMP-2 and MMP-9 production, and promote angiogenesis via pathways involving PI3K, p38, ERK, JNK and NF-κB. The results suggest that inhibition of SIRT1 and VEGF might attenuate pro-inflammatory mediator-induced pulpal disease.
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Affiliation(s)
- M R Shin
- Department of Prosthodontics, Dongatn Sacred Heart Hospital, Hallym University, Dongtan, Korea
| | - S K Kang
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Y S Kim
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S Y Lee
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S C Hong
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - E-C Kim
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
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Han SY, Ahn KH, Lee CH, Hong SC, Oh MJ, Kim HJ. Concomitant therapy with hysterectomy and arterial embolisation for postpartum uterine haemorrhage. J OBSTET GYNAECOL 2014; 35:424-5. [PMID: 25207796 DOI: 10.3109/01443615.2014.954100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- S Y Han
- Department of Obstetrics and Gynaecology, Korea University Medical Center, College of Medicine, Korea University , Seoul , South Korea
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Abstract
PURPOSE Body image incorporates cognitive and affective components as well as behaviors related to own body perception. This study evaluated the occurrence of body image distortion and its correlates in Korean adolescents. METHODS In a school-based cross-sectional survey, a total of 2,117 adolescents were recruited. They filled out self-completing questionnaires on body image distortion, eating attitudes, and behaviors (Eating Attitude Test-26) and related factors. RESULTS Body image distortions were found in 51.8 percent of adolescents. Univariate analyses showed that boys and older adolescents had higher rates of body image distortion. In the multivariate analyses, body image distortion was associated with high risk for eating disorders (odds ratio [OR] =1.69; 95% confidence interval [CI] 1.11-2.58; P=0.015) and being over weight (OR =33.27; 95% CI 15.51-71.35; P<0.001) or obese (OR =9.37; 95% CI 5.06-17.34; P<0.001). CONCLUSION These results suggest that body image distortion is relatively common in Korean adolescents, which has implications for adolescents at risk of developing eating disorders.
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Affiliation(s)
- Mi-Yeul Hyun
- College of Nursing, Jeju National University, Jeju, Korea
| | - Young-Eun Jung
- Department of Psychiatry, School of Medicine, Jeju National University, Jeju, Korea
| | - Moon-Doo Kim
- Department of Psychiatry, School of Medicine, Jeju National University, Jeju, Korea
| | - Young-Sook Kwak
- Department of Psychiatry, School of Medicine, Jeju National University, Jeju, Korea
| | - Sung-Chul Hong
- Department of Preventive Medicine, School of Medicine, Jeju National University, Jeju, Korea
| | - Won-Myong Bahk
- Department of Psychiatry, Yeouido St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Bo-Hyun Yoon
- Department of Psychiatry, Naju National Hospital, Naju, Korea
| | - Hye Won Yoon
- School of Medicine, Jeju National University, Jeju, Korea
| | - Bora Yoo
- School of Medicine, Jeju National University, Jeju, Korea
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Lee HS, Hong SC, Kim JH, Kim JW, Lee KH, Lee J, Jeong JH. Complete enumeration for the prevalence of allergic disease in Udo Isle's inhabitants. Allergy Asthma Respir Dis 2013. [DOI: 10.4168/aard.2013.1.2.116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Hye-Sook Lee
- Environmental Health Center, Jeju National University School of Medicine, Jeju, Korea
| | - Sung-Chul Hong
- Environmental Health Center, Jeju National University School of Medicine, Jeju, Korea
- Department of Preventive Medicine, Jeju National University School of Medicine, Jeju, Korea
| | - Jeong-Hong Kim
- Environmental Health Center, Jeju National University School of Medicine, Jeju, Korea
- Department of Otorhinolaryngology, Jeju National University School of Medicine, Jeju, Korea
| | - Jae-Wang Kim
- Environmental Health Center, Jeju National University School of Medicine, Jeju, Korea
- Department of Dermatology, Jeju National University School of Medicine, Jeju, Korea
| | - Keun-Hwa Lee
- Environmental Health Center, Jeju National University School of Medicine, Jeju, Korea
- Department of Microbiology, Jeju National University School of Medicine, Jeju, Korea
| | - Jaechun Lee
- Environmental Health Center, Jeju National University School of Medicine, Jeju, Korea
- Department of Internal Medicine, Jeju National University School of Medicine, Jeju, Korea
| | - Jin-Ho Jeong
- Environmental Health Center, Jeju National University School of Medicine, Jeju, Korea
- Department of Ophthalmology, Jeju National University School of Medicine, Jeju, Korea
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Hong SC, Lim YK, Chew SH, Chia YN, Yam KL. Case report of granular cell tumor of the vulva and review of current literature. Gynecol Oncol Case Rep 2012; 3:20-2. [PMID: 24371657 DOI: 10.1016/j.gynor.2012.10.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 10/30/2012] [Indexed: 12/11/2022]
Abstract
► We present four cases of benign granular cell tumours of the vulva managed between 1998 and 2001. ► We discuss the clinical and histopathological features of this condition. ► Treatment of this condition is primarily surgical.
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Affiliation(s)
- S C Hong
- Department of General Obstetrics and Gynaecology, KK Women's and Children's Hospital, Singapore
| | - Y K Lim
- Department of Gynaecological Oncology, KK Women's and Children's Hospital, Singapore
| | - S H Chew
- Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore
| | - Y N Chia
- Department of Gynaecological Oncology, KK Women's and Children's Hospital, Singapore
| | - K L Yam
- Department of Gynaecological Oncology, KK Women's and Children's Hospital, Singapore
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Lim HK, Hong SC, Jung WS, Ahn KJ, Won WY, Hahn C, Kim IS, Lee CU. Automated segmentation of hippocampal subfields in drug-naïve patients with Alzheimer disease. AJNR Am J Neuroradiol 2012; 34:747-51. [PMID: 23042923 DOI: 10.3174/ajnr.a3293] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Although a few automated hippocampal subfield segmentation methods have been developed, there is no study on the effects of the diagnosis of Alzheimer disease on the hippocampal subfield volume with in vivo MR imaging. The aim of this study was to investigate hippocampal subfield volume differences between drug-naïve subjects with AD and healthy elderly controls by using an automated hippocampal subfield segmentation technique. MATERIALS AND METHODS Thirty-one drug-naïve subjects with AD and 33 group-matched healthy control subjects underwent 3T MR imaging, and hippocampal subfield volume was measured and compared between the groups. RESULTS Subjects with AD had significantly smaller volumes of the presubiculum, subiculum, CA2-3, and CA4 DG compared with healthy subjects (uncorrected, P<.001). In addition, we found significant positive correlations between the presubiculum and the subicular volumes and the MMSE-K and the CERAD-K verbal delayed recall scores in the AD group. CONCLUSIONS We are unaware of previous imaging studies of automated hippocampal subfield segmentation in AD. These structural changes in the hippocampal presubiculum, subiculum, and CA2-3 might be at the core of underlying neurobiologic mechanisms of hippocampal dysfunction and their relevance to verbal delayed recall impairments in AD.
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Affiliation(s)
- H K Lim
- Department of Psychiatry, Saint Vincent Hospital, and College of Medicine, Catholic University of Korea, Suwon, Korea
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Bae HS, Ahn KH, Oh MJ, Kim HJ, Hong SC. Postpartum uterine involution: sonographic changes in the endometrium between 2 and 6 weeks postpartum related to delivery mode and gestational age at delivery. Ultrasound Obstet Gynecol 2012; 39:727-728. [PMID: 22223478 DOI: 10.1002/uog.11069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Hwang Y, Lee SH, Hong SC, Kim DY, Kim YJ, Seo JW, Son IS, Jung HA, Choi HS, Lee JH, Kim HR. A Case of Giant Cell Arteritis Accompanied by Acute Myeloid Leukemia. J Rheum Dis 2012. [DOI: 10.4078/jrd.2012.19.4.212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yong Hwang
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Sang-Heon Lee
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Sung-Chul Hong
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Do-Young Kim
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Yong-Jin Kim
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Jung-Woong Seo
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - In-Sung Son
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Hyun-A Jung
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Hong-Seok Choi
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Jung-Hwa Lee
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Hae-Rim Kim
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
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Hong SC, MacGuidwin A, Gratton C. Soybean aphid and soybean cyst nematode interactions in the field and effects on soybean yield. J Econ Entomol 2011; 104:1568-74. [PMID: 22066186 DOI: 10.1603/ec11084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
How above- and belowground plant pests interact with each other and how these interactions affect productivity is a relatively understudied aspect of crop production. Soybean cyst nematode, Heterodera glycines Ichinohe, a root parasite of soybean, Glycine max (L.) Merr., is the most threatening pathogen in soybean production and soybean aphid, Aphis glycines Matsumura, an aboveground phloem-feeding insect that appeared in North America in 2000, is the key aboveground herbivore of soybean in the midwestern United States. Now, both soybean aphid and soybean cyst nematode co-occur in soybean-growing areas in the Upper Midwest. The objectives of this study were to examine aphid colonization patterns and population growth on soybean across a natural gradient of nematode density (range, approximately 900 and 27,000 eggs per 100 cm3 soil), and to investigate the effect of this pest complex on soybean productivity. Alate (winged) soybean aphid colonization of soybean was negatively correlated to soybean cyst nematode egg density (r = -0.363, P = 0.0095) at the end of July, at the onset of peak alate colonization. However, both a manipulative cage study and openly colonized plants showed that soybean cyst nematode density below ground was unrelated to variation in aphid population growth (r approximately -0.01). Based on regression analyses, soybean aphids and cyst nematodes had independent effects on soybean yield through effects on different yield components. High soybean cyst nematode density was associated with a decline in soybean yield (kg ha(-1)), whereas increasing soybean aphid density (both alate and apterous) significantly decreased seed weight (g 100 seeds(-1)).
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Affiliation(s)
- S C Hong
- Department of Entomology, University of Wisconsin-Madison; 237 Russell Labs, 1630 Linden Dr., Madison, WI 53706, USA
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Hong SC, Lau MSK, Yam PKL. Ectopic pregnancy in previous Caesarean section scar. Singapore Med J 2011; 52:e115-e117. [PMID: 21731980] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report two cases of Caesarean scar pregnancies that were managed surgically. The first case was a 33-year-old woman who presented at 21 weeks of gestation with lower abdominal pain. An exploratory laparotomy was performed as she was hypotensive and had a drastic drop in haemoglobin level. Intraoperatively, a ruptured scar ectopic pregnancy with placenta percreta was found. A hysterectomy was performed in view of uncontrolled haemorrhage. The second case was a 30-year-old woman who presented with irregular per vaginal spotting without abdominal pain. Ultrasonography revealed a gestational sac at a previous Caesarean scar, with interval increase in size and development of a yolk sac. On laparoscopy, the diagnosis of scar pregnancy was confirmed, and the gestational sac and surrounding myometrium were excised. Our case report shows that early diagnosis of scar pregnancy is important, as timely intervention can prevent life-threatening complications and preserve fertility.
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Affiliation(s)
- S C Hong
- Department of General Obstetrics and Gynaecology, KK Women's and Children's Hospital, 100 Bukit Timah Road, Singapore 229899.
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Kim JH, Kim MS, Hong SC, Kim BW. Preparation of Transparent Film by Coating of Acrylate Copolymer as MMA-co-GMA-co-AA. Korean Chemical Engineering Research 2011. [DOI: 10.9713/kcer.2011.49.1.062] [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: 11/23/2022]
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Park JH, Lee SH, Lee JH, Hong SC, Hong MJ, Park E, Han JS, Lee CI, Kim SM, Kim HR. A Case of Scleredema Associated with Dermatomyositis. J Rheum Dis 2011. [DOI: 10.4078/jrd.2011.18.4.324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Jung Hee Park
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Sang-Heon Lee
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Jung Hwa Lee
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Sung-Chul Hong
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Mi-Jin Hong
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Eugene Park
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Jang-Soo Han
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Cho-I Lee
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - So-Mi Kim
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Hae-Rim Kim
- Division of Rheumatology, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
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Hong SC, Donaldson J, Gratton C. Soybean cyst nematode effects on soybean aphid preference and performance in the laboratory. Environ Entomol 2010; 39:1561-9. [PMID: 22546453 DOI: 10.1603/en10091] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Herbivores on plants frequently interact via shared resources. Studies that have examined performance of herbivores in the presence of other herbivores, however, have often focused on above-ground feeding guilds and relatively less research has examined interactions between below- and above-ground consumers. We examine how soybean aphid, Aphis glycines (Matsumura) an above-ground phloem-feeding herbivore, interacts with a below-ground plant parasite, soybean cyst nematode, Heterodera glycines (Ichinohe) through their shared host plant, soybean (Glycine max L). Laboratory experiments evaluated the preference of alate (flight-capable) soybean aphids toward plants either infected with soybean cyst nematode or uninfected controls in a simple choice arena. Alate soybean aphids preferred uninfected soybean over soybean cyst nematode-infected plants: 48 h after the releases of alate aphids in the center of the arena, 67% more aphids were found on control soybean compared with nematode infected plants. No-choice feeding assays were also conducted using clip cages and apterous (flight-incapable) aphids to investigate effect of soybean cyst nematode infection of soybean on aphid performance. These studies had mixed results: in one set of experiments overall aphid population growth at 7 d was not statistically different between control and soybean cyst nematode-infected plants. A different experiment using a life-table analysis found that apterous aphids feeding on soybean cyst nematode-infected plants had significantly greater finite rate of increase (λ), intrinsic rate of increase (r(m)), and net reproductive rate (R(o)) compared with aphids reared on uninfected (control) soybean plants. We conclude that the below-ground herbivore, soybean cyst nematode, primarily influences soybean aphid behavior rather than performance.
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Affiliation(s)
- S C Hong
- Department of Entomology, University of Wisconsin/Madison, 237 Russell Labs, 1630 Linden Drive, Madison, WI 53706, USA
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Affiliation(s)
- K S Hong
- Department of Neurosurgery, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 50 Ilwon-Dong, Kangnam-Gu, Seoul 135-710 Korea
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Hong SC, Lee JH, Chi HS, Lee CK, Nah SS, Kim YG, Oh JS, Moon HB, Yoo B. Systemic lupus erythematosus complicated by acquired von Willebrand’s syndrome. Lupus 2008; 17:846-8. [DOI: 10.1177/0961203308089429] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Haematological abnormalities are common in systemic lupus erythematosus (SLE). In some cases of acquired von Willebrand syndrome (AvWS), von Willebrand disease (vWD) is associated with autoimmune or lymphoproliferative disorders. In this study, we describe a 36-year-old woman with SLE and AvWS. The patient was referred to our hospital because of easy bruisability and recurrent vaginal bleeding. She had no history of bleeding tendency and no family history of bleeding diathesis, but she had a history of recurrent arthralgia, photosensitivity and sicca symptoms. Tests for antinuclear, anti–double stranded DNA, anticardiolipin and anti–β2-glycoprotein I antibodies were all positive. Analysis of haemostatic parameters showed complete absence of von Willebrand factor ristocetin cofactor (vWF:Rco), von Willebrand antigen (vWF:Ag) and ristocetin-induced platelet aggregation (RIPA). Electrophoretic analysis of plasma showed a complete absence of high–molecular weight vWF multimer. The presence of antibody to vWF was detected by enzyme linked immunosorbent assay (ELISA). Treatment with corticosteroids improved SLE symptoms and corrected bleeding diasthesis. Also, the multimeric patterns of vWF became normalised and anti–vWF antibody disappeared. These findings indicated that this patient had SLE associated with AvWS, which was ameliorated by corticosteroid treatment.
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Affiliation(s)
- SC Hong
- Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - JH Lee
- Division of Hematology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - HS Chi
- Department of Laboratory Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - CK Lee
- Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - SS Nah
- Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - YG Kim
- Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - JS Oh
- Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - HB Moon
- Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
| | - B Yoo
- Division of Rheumatology, Department of Internal Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, South Korea
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Shin YK, Yoon IY, Han EK, No YM, Hong MC, Yun YD, Jung BK, Chung SH, Choi JB, Cyn JG, Lee YJ, Hong SC. Prevalence of narcolepsy-cataplexy in Korean adolescents. Acta Neurol Scand 2008; 117:273-8. [PMID: 17922892 DOI: 10.1111/j.1600-0404.2007.00930.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [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: 11/30/2022]
Abstract
BACKGROUND Narcolepsy typically begins between adolescence and early adulthood causing severe neuropsychiatric impairments, but few prevalence studies are available on adolescent narcoleptics. In the present study, we investigated the prevalence of narcolepsy-cataplexy in adolescents. METHODS In total 20,407 students, aged 14-19 years, participated in this study. Ullanlinna Narcolepsy Scale (UNS) was applied to all subjects and those with a UNS score of > or =14 were contacted by phone for semi-structured interview. Subjects then suspected of having narcolepsy participated in a laboratory investigation, which included polysomnography and HLA typing, or were interviewed in detail by telephone. RESULTS Three subjects were finally diagnosed as narcolepsy with cataplexy and seven subjects might be diagnosed as narcolepsy without cataplexy. Among three narcoleptics with cataplexy, two subjects were HLA-DQB1*0602 and DRB1*1501 positive, but one subject had no test of HLA typing. The prevalence of narcolepsy with cataplexy in Korean adolescence was thus determined to be 0.015% (95% confidence interval = 0.0-0.0313%). CONCLUSION This epidemiologic study is the first of its type on adolescent narcolepsy to use the International Classification of Sleep Disorders, 2nd edition (ICSD-2) diagnostic criteria. Considering those cases with an onset after adolescence were not included, the prevalence of narcolepsy with cataplexy determined in the present study is comparable with that of other studies in adults.
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Affiliation(s)
- Y K Shin
- Department of Psychiatry, St Vincent's Hospital, The Catholic University of Korea, Suwon, Korea
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Abstract
In this study, as a promising technique for the treatment of both As(III) and As(V) at the same time in a single reactor, a column reactor containing both manganese-coated sand (MCS) and iron-coated sand (ICS), at different configuration of MCS and ICS, was used to treat wastewater contaminated with As(III). Prior to column experiments, batch experiments for the adsorption of As(V) by ICS were performed with variation of solution pH, ionic strength and types of background ions to investigate the effect of these parameters on the As(V) adsorption behaviour. As(V) adsorption onto ICS was quite similar with the variation of ionic strength by using NaNO3 as a background ion as well as in the presence of different types of background ions except phosphate. The adsorption curves shifted to the lower pH region with the increase of the initial arsenic concentration due to the finite number of adsorption sites on the ICS. For model prediction on the adsorption of As(V) onto ICS, the MINEQL program employing an inner-sphere complexation and a diffuse layer model was used. Model predictions generally agreed well with experimental results. From the column test, column system packed with equal ratio of MCS and ICS was identified as the best system due to a promising oxidation efficiency of As(III) to As(V) by MCS and adsorption of As(V) by both MCS and ICS.
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Affiliation(s)
- J K Yang
- Department of Environmental Engineering, Kwangwoon University, Seoul, Korea.
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Hong SC, Williamson RC. Suitability of various turfgrass species and cultivars for development and survival of black cutworm (Lepidoptera: Noctuidae). J Econ Entomol 2006; 99:850-7. [PMID: 16813321 DOI: 10.1603/0022-0493-99.3.850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Black cutworm, Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae), feeding bioassays were conducted on young and mature turfgrass species to determine their potential resistance. Measures of resistance included larval weight, survival rate, instar development, pupal weight, duration of pupation, and days to pupation and adult emergence. Black cutworm reared on Poa pratensis 'Midnight', Poa arachnigera 'Tejas', and Poa pratensis X Poa arachnigera 'Reveille' exhibited slower development, lower weight, and higher overall mortality than those fed upon other turfgrasses tested. Larvae reared on Reveille did not survive to pupation and all died within 14 d. Black cutworm larvae reared on Midnight died within 17 d in trial 1 but attained pupation in trial 2. However, development of black cutworm larvae was slower on Poa pratensis Midnight compared with other susceptible turfgrass species such as Agrostis stolonifera 'Penncross', Poa annua ('DW194', 'Q98-4-6', and 'Q98-6-18'), Lolium perenne, and Poa supina 'Supranova'. Generally, larval performance on young plant tissues was better than on mature plant tissues. Larvae reared on P. pratensis 'Midnight' exhibited the most distinctive difference on young versus mature plant tissue. These results suggest that plant age may play an important role in turfgrass susceptibility and resistance.
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Affiliation(s)
- S C Hong
- Department of Entomology, University of Wisconsin, Madison, WI 53706, USA
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Kim TB, Kim YK, Chang YS, Kim SH, Hong SC, Jee YK, Cho SH, Min KU, Kim YY. Association between sensitization to outdoor spider mites and clinical manifestations of asthma and rhinitis in the general population of adults. J Korean Med Sci 2006; 21:247-52. [PMID: 16614509 PMCID: PMC2733999 DOI: 10.3346/jkms.2006.21.2.247] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
It has been demonstrated that spider mites such as the two-spotted spider mite (Tetranychus urticae) are important allergens for fruit farmers. A total of 2,467 adults (795 metropolitan urban, 788 non-metropolitan urban, and 884 rural subjects) were enrolled. They responded to the questionnaire, and underwent methacholine bronchial provocation tests as well as skin prick tests to locally common aeroallergens including the two-spotted spider mite. The prevalences of asthma and rhinitis as reported on the questionnaire were 7.8% and 16.4% of adults aged 20-35, 9.4% and 24.7% of those 36-50, and 17.7% and 21.7% of those older than 50, respectively. Among the older group, the two-spotted spider mite was the most common sensitizing allergen, although it was second of that of house dust mites among the other two age groups. Sensitization to the two-spotted spider mite was significantly associated with the prevalence of asthma and rhinitis among the younger age group, and associated with the prevalence of rhinitis among the older age group. The two-spotted spider mite might be a common sensitizing allergen in the general population of adults, and sensitization to this mite may play a role in the manifestation of asthma and rhinitis symptoms during adulthood.
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Affiliation(s)
- Tae-Bum Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea
| | - Yoon-Keun Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea
| | - Yoon-Seok Chang
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea
| | - Sang-Hoon Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea
| | - Sung-Chul Hong
- Department of Preventive Medicine, Cheju National University College of Medicine, Cheju, Korea
| | - Young-Koo Jee
- Department of Internal Medicine, Dangook University College of Medicine, Cheonan, Korea
| | - Sang-Heon Cho
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea
| | - Kyung-Up Min
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea
| | - You-Young Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea
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Abstract
BACKGROUND In patients with lesions at the eloquent areas, the aim of surgical interventions should be a more radical removal of the lesions with preservation of brain function. In this retrospective study, our techniques for localizing lesion and the postoperative results of 26 patients with cavernous angiomas (CA) located at the eloquent areas are summarized. METHOD The MR based 3D-rendering images were reconstructed from the 2D MR images by using a computerized program. These images were obtained in all patients for the localization of their lesion. Following craniotomy, to verify the actual location of lesions, we compared the 3D-image to the exposed cortical surface. Simultaneously, intraoperative ultrasonogram (IOUS) was used for the accurate localization of the lesion. In order to minimize the damage to the eloquent area, the minimal corticotomy was planned at the margin of the sulcus nearest to the lesion. FINDINGS An accurate localization of the lesion was possible in all 26 patients and the eloquent areas near the lesions were identified on the operation field. Complete removal of the CAs was done in all cases. One patient developed temporary monoparesis postoperatively, but the patient fully recovered in a month. Fourteen patients presented with preoperative seizures, and all patients had excellent seizure outcome after their surgery. The mean duration of the follow-up period was 27 months. CONCLUSIONS We could localize the lesion accurately using MRI 3D-rendering images and IOUS during the operation for CA. We planned minimal corticotomy to the lesion and we completely removed the lesion without causing any additional neurological deficit. Although CA can be located in eloquent areas, surgical removal of these lesions is a safe and effective treatment option for lowering the risk of developing symptoms and controlling the seizure.
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Affiliation(s)
- Y J Jung
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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