• Journal of the Korean Chemical Society
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• v.46 no.6
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• pp.535-540
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• 2002

It is very difficult to analyze the microcystins, cyanobacterial toxins quantitatively since it exists in a trace level in lakes. In this paper, two different analytical methods were tried to analyze the microcystins, cyanobacterial toxins quantitatively in water samples collected in Soyang lake. The first method was solid phase extraction method fol-lowed by High Performance Liquid Chromatography(HPLC), and the second method was Enzyme-Linked Immu-nosorbent Assay(ELISA) using the monoclonal antibody of microcystin.

• Journal of Physiology & Pathology in Korean Medicine
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• v.27 no.5
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• pp.487-496
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• 2013

This article is a study on to which categories of modern diseases qi deficiency pattern types are assigned by reference to modern clinical papers to analyze and understand modern diseases with the perspective of Korean Medicine. Clinical papers were searched in China Academic Journals(CAJ) of China National Knowledge Infrastructure(CNKI) from 1994 to 2013. Conclusions are as follows. First, qi deficiency pattern types are roughly classified as qi deficiency pattern, qi-yin dual deficiency pattern and qi deficiency pattern related with viscera and bowels. Second, there are many patterns combined with static blood, qi stagnation, phlegm, dampness, heat, toxin, water or fluid deficiency and the level of pattern designation is more specific than pattern types in Korean Standard Classification of Diseases(KCD), which makes the pattern types more useful to clinical application. Third, static blood due to qi deficiency is the most frequent combined pattern and diseases related with blood circulation such as angina, atherosclerosis, hyperlipidemia and chronic obstructive pulmonary disease(COPD) were reported on that pattern. The detailed relation between modern diseases and pattern types can be an another topic.

• Microbiology and Biotechnology Letters
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• v.23 no.6
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• pp.730-736
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• 1995

The solubilization and proteolytic process of $\delta $-endotoxin was analvsed to compare the biochemical property of the toxin isolated from B. thuringiensis subsp. sotto. The purified crystals were dissolved in 50 mM carbonate buffer containing 10 mM dithiothreitol at pH 10 for various times. The electrophoretic pattern showed that a rapid disappearance of 138 kDa protein band. This disappearance of protein with high molecular weight was accompanied by the appearance of new protein fragment with 104 kDa, 60 kDa, and 25 kDa. For proteolvtic processing, the soluble crystals were digested with trypsin for various times. The soluble crystal protein of 104 kDa was completely disappeared. However, the protein fragment of 60 kDa and 25 kDa still remained after complete proteolysis. The comparative immunoblot analysis showed that the antiserum against intact crystals showed strong immunoreactivity to the homologous inclusion protein of 138 kDa, 104 kDa, and 25 kDa, and to the intact spores of 221 kDa and 138 kDa, but not to the vegetative cell homogenate. The sera against crystals and spores had no immunoreactivity to the vegetative cell homogenate.

• Journal of Microbiology and Biotechnology
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• v.27 no.3
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• pp.542-551
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• 2017

Small phytochemicals have been successfully adopted as antibacterial chemotherapies and are being increasingly viewed as potential antibiofilm agents. Some of these molecules are known to repress biofilm and toxin production by certain bacterial and yeast pathogens, but information is lacking with regard to the genes allied with biofilm formation. The present study was performed to investigate the inhibitory effect of burdock root extract (BRE) and of chlorogenic acid (CGA; a component of BRE) on clinical isolates of Klebsiella pneumoniae. BRE and CGA exhibited significant antibiofilm activity against K. pneumoniae without inflicting any harm to its planktonic counterparts. In vitro assays supported the ${\beta}$-lactamase inhibitory effect of CGA and BRE while in silico docking showed that CGA bound strongly with the active sites of sulfhydryl-variable-1 ${\beta}$-lactamase. Furthermore, the mRNA transcript levels of two biofilm-associated genes (type 3 fimbriae mrkD and trehalose-6-phosphate hydrolase treC) were significantly downregulated in CGA- and BRE-treated samples. In addition, CGA inhibited biofilm formation by Escherichia coli and Candida albicans without affecting their planktonic cell growth. These findings show that BRE and its component CGA have potential use in antibiofilm strategies against persistent K. pneumoniae infections.

• Nutrition Research and Practice
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• v.9 no.2
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• pp.117-122
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• 2015

BACKGROUND/OBJECTIVES: Curcumin, a major component of the Curcuma species, contains antioxidant and anti-inflammatory properties. Although it was found to induce apoptosis in cancer cells, the functional role of curcumin as well as its molecular mechanism in anti-inflammatory response, particularly in intestinal cells, has been less investigated. The intestine epithelial barrier is the first barrier and the most important location for the substrate coming from the lumen of the gut. SUBJECTS/METHODS: We administered curcumin treatment in the human intestinal epithelial cell lines, T84 and Caco-2. We examined endoplasmic reticulum (ER) stress response by thapsigargin, qPCR of XBP1 and BiP, electrophysiology by wild-type cholera toxin in the cells. RESULTS: In this study, we showed that curcumin treatment reduces ER stress and thereby decreases inflammatory response in human intestinal epithelial cells. In addition, curcumin confers protection without damaging the membrane tight junction or actin skeleton change in intestine epithelial cells. Therefore, curcumin treatment protects the gut from bacterial invasion via reduction of ER stress and anti-inflammatory response in intestinal epithelial cells. CONCLUSIONS: Taken together, our data demonstrate the important role of curcumin in protecting the intestine by modulating ER stress and inflammatory response post intoxication.

• Journal of Microbiology and Biotechnology
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• v.21 no.10
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• pp.1097-1100
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• 2011

A toxin produced by Pseudomonas tolaasii, tolaasin, causes brown blotch disease in mushrooms. Tolaasin forms pores on the cellular membrane and destroys cell structure. Inhibiting the ability of tolaasin to form ion channels may be an effective method to protect against attack by tolaasin. However, it is first necessary to elucidate the three-dimensional structure of the ion channels formed by tolaasin. In this study, the structure of the tolaasin ion channel was determined in silico based on data obtained from nuclear magnetic resonance experiments.

• Journal of the Korean Institute of Oriental Medical Informatics
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• v.17 no.1
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• pp.257-293
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• 2011

"Byun Jeung Rok(辨證錄)" written by Jinsatak(陳士鐸) is composed of 14 volumes. In relation to the contents, it is organized into 126 gates(門) and 770 remaining syndromes(餘證) where internal medicine, external medicine, pediatrics, gynecology(內科 外科 小兒 婦人), etc. are divided into sub-sections of cold damage, cold stroke, wind stroke(傷寒 中寒 中風), etc. He explained the symptom, cause of disease, method of treatment, prescription, construction of prescription, instruction of medicine and prognosis(症狀 病因 治法 處方 處方構成 服用法 預後) thoroughly. This study, as an inquiry of the sec 14 volume pediatrics(小兒), deals with febrile fit cacotrophy vomiting diarrhea(驚疳吐瀉), coprozoic parasite(便蟲), smallpox(痘瘡), eruption(疹症), eating mud(喫泥), fetal toxin(胎毒). It was written very logically so it is easy to understand. The analysis of the symptoms are brief and appropriate. Therefore, it is considered to have significant clinical value for future generations and is applied by them. Finally, this topic was studied in hopes of helping later pediatrics clinical treatment.

• The Korea Journal of Herbology
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• v.21 no.2
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• pp.15-26
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• 2006

Objectives : The plans can be used for medicinal purposes among Gymnospermae in korea and examined their effects and distributions. Methods : The examined herbalogical books and research papers which published at home and abroad. Results : 1. Pinus genus is main kind enough that it has 22 species among 75 species in the Gymnospermae of which medicinal plants are 7 species. 2. Folium is the main medicinal parts of medicinal plants in the Gymnospermae which is used in 22 genera. 3. According to nature and flavor of medicinal plants in the Gymnospermae, they were classified into warm 19 genera, balance 18 ; bitter taste 25, sweet taste 21. 4. According to meridian propism of medicinal plants in the Gymnospermae, they were classified into spleen meridian 12 genera, lung meridian 11, liver meridian 9, heart meridian 7. 5. According to the properties and principal curative action, they were classified into drugs for relieve wind and moisture 37 genera, drugs for relieve pain 21, drugs for hemostasis 15, drugs to activity 14. 6. It was researched that toxic medicinal plants include toxin were 8 kinds. Conclusion : There were totaled to 21 genera and 75 species in Gymnospermae in Korea and among them medicinal plants are 14 genera, 28 species, some 37% in total.

• The Korea Journal of Herbology
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• v.27 no.2
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• pp.17-24
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• 2012

Objective : For the purpose of investigating the herbal resources of Dokdo island, this study was designed. Method : For the first time, we searched the native plants of Dokdo island from research data. And we examined herbological books on the plants of Dokdo island. Result : The native herbaceous plants in Dokdo island were 27 family and 73 species, and the medicinal plants were 49 species among them. The woody plants in Dokdo island were 12 family and 13 species, and the medicinal plants were 10 species among them. The main medicinal parts of medicinal plants were the whole body of herbs, roots, and seeds in order. The herbal medicines with cold or cool nature were 45 species, they took the top nature of the herbal medicines. According to the properties and principal action of native herbal medicines in Dokdo island, the major parts were classified into drugs for clearing away heat, eliminating toxin, activating blood flow and removing blood stasis, urination, removing heat from the blood and stopping of bleeding. The number of native herbal medicines with small toxicity in Dokdo island were 7 species. Conclusion : For the purpose of preserving the native plants of Dokdo island, we should recognize not only medical benefits but also matters that demand special attention.

• Korean Journal of Veterinary Research
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• v.39 no.2
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• pp.338-342
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• 1999

Twenty three strains of Escherichia (E) coli O157 : H7 isolated from Korea, Japan, USA were analyzed by pulsed-field gel electrophoresis (PFGE) of XbaI-digested chromosomal DNA and multiplex polymerase chain reaction. Various PFGE patterns of E. coli O157 : H7 were found on the same farm. Most of the E, coli O157 : H7 strains had shiga-like toxin (slt) II gene only (43.5%) or both slt I and slt II genes(30.4%). eaeA gene was highly conserved in the E. coli O157 : H7. There was no correlation between PFGE and slt gene patterns. The results indicate that various genotypes of E. coli O157 : H7 have spread throughout the country and genomic DNA patterns generated by PFGE are highly specific for different strains and have significant value in epidemiologic investigations of infectious disease outbreaks.