Park, Se-Ho;Lee, Jae-Yeul;Jhee, Kwang-Hwan;Yang, Seun-Ah
Journal of Life Science
/
v.30
no.4
/
pp.370-378
/
2020
This study aimed to investigate the hepatoprotective effect of Dendropanax morbifera (D. morbifera) leaf hot-water extract on carbon tetrachloride (CCl4)-treated HepG2 cells. Treatment with D. morbifera leaf hot-water extract increased the cell viability of CCl4-treated HepG2 cells without inducing cytotoxicity. The levels of alanine transaminase (ALT) and aspartate transaminase (AST) released by CCl4-treated cells were 27.6 U/L and 52.4 U/L, respectively, and were significantly higher than those in untreated control cells (10.0 U/L and 15.2 U/L, respectively). Moreover, the level of γ-glutamyl transpeptidase (GGT) was 5.4 times higher, while that of glutathione was 44.0% lower in CCl4-treated cells than in control cells. However, treatment with D. morbifera leaf hot-water extract resulted in a dose-dependent decrease in the levels of ALT, AST, and GGT, and an increase in the level of glutathione. Moreover, the malondialdehyde (MDA) content in CCl4-treated HepG2 cells was effectively reduced after treatment with D. morbifera leaf hot-water extract. Additionally, overproduction of intracellular lipids induced by CCl4 treatment was effectively inhibited by D. morbifera leaf hot-water extract treatment. Furthermore, DCFDA staining showed that overproduction of reactive oxygen species (ROS) induced by CCl4 treatment was effectively reduced by treatment with D. morbifera leaf hot-water extract. Our results indicate that owing to its beneficial effects, D. morbifera leaf extract has considerable potential as a functional food material for liver protection.
Between 1997 and 1998 in Korea, 56 isolates of Escherichia coli were obtained from pig suffering diarrhea. Among those, 38 isolates that showed the hemolytic activity, antimicrobial resistance, and toxin production were studied. Among 38 isolates, thirty-six isolates $(94.7\%)$ were resistant to tetracycline, 27 isolates $(71.0\%)$ were resistant to ampicillin, 26 isolates $(68.4\%)$ were resistant to chloramphenicol, and 21 isolates $(55.2\%)$ were resistant to trimethoprim, while none was resistant to aztreonam, amikacin, and norfloxacin. Among these isolates, 21 isolates $(55.3\%)$ were multiple drug resistant to at least four different class antimicrobial agents. Extended spectrum $\beta-lactamase$ producing isolates were not detected in the double disk synergy test. In these hemolytic Escherichia coli, heat-stable enterotoxin $(89.5\%)$ was the most prevalent toxin, followed by verotoxins $(47.4\%),$ and then heat-labile enterotoxin $(31.6\%).$ Except 8 isolates $(21.0\%)$ which produced ST only, 12 isolates $(31.6\%)$ produced ST and LT, 13 isolates $(34.2\%)$ produced ST, VT, and VTe, and 5 isolates $(13.2\%)$ produced VT and VTe. However, none produced all 4 types of toxin, simultaneously. The predominant serotype could not be determined by the agglutination method. Sixteen isolates $(42.1\%)$ were strongly adhered to T-24 bladder cell and 17 isolates $(44.7\%)$ were to Caco-2 intestinal cell. Especially, 11 strains $(28.9\%)$ were evaluated as strongly adhesive to both T-24 cells and Caco-2 cells. Genes for toxin and the antimicrobial resistance were transferred to clinical isolates of Escherichia coli from human urine by the filter mating method. Results suggest the possibility that antimicrobial resistance and toxin can be transferred from animals to humans by direct contact of resistant bacteria as well as gene transfer, although there was no correlation between toxin production, adherent activity, and antimicrobial resistance among hemolytic E. coli isolated from pig suffering diarrhea.
Kim, I.A.;Jin, E.J.;Cho, E.J.;Sohn, S.H.;Lee, C.Y.
Journal of Animal Science and Technology
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v.46
no.4
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pp.563-570
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2004
The insulin-like growth factor(IGF) system, consisting of IGFs-I and -II ligands and their receptors and six IGF-binding proteins(IGFBPs), plays an important role in survival, proliferation and differentiation of a variety of cell types. Lithium is a known modulator of survival and proliferation of many cell types in vitro. The present study was undertaken to investigate the relationship between LiCI-induced changes in cell survival and growth and the expression of the IGF system components in C6 rat glioma cell line which, besides IGF-I and its receptor, is known to express IGFBP-3 as its major IGF carrier. When C6 cells were cultured for 24h in the absence or presence of 2mM or 5mM LiCl in a 10% serwn-containing medium, the viability and the number of cells were not affected by added lithium. In 72-h culture, however, C6 cells clearly exhibited a dose-dependent response to added LiCl. The cells cultured for 72h in the presence of 0, 2mM and 5mM LiCl exhibited a typical mitotic, a growth-arrested and an apoptotic appearances, respectively. Moreover, the apoptotic cells were accompanied by reduced expression of IGF-I, IGF-I receptor and IGFBP-3 as examined by semi-quantitative reverse transcription-polymerase chain reaction. Interestingly, blockade of IGFBP-3 mRNA translation by addition of 101${\mu}M$ IGFBP-3 anti-sense oligodeoxyribonucleotide in serum-free, 24-h culture resulted in a decrease in the number of cells as well as relative abundance of the target mRNA. In summary, results suggest that the cytotoxic effect of lithium in C6 cell is likely to be mediated, in part, by suppression by this agent of the expression of the IGF system components. In this regard, IGFBP-3 may play at least a 'permissive' role in normal proliferation of this cell.
Journal of The Korean Society of Inherited Metabolic disease
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v.15
no.1
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pp.29-34
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2015
Citrullinemia type1 is an autosomal recessive disorder of the urea cycle characterized by neonatal or late onset of hyperammonemia caused by a deficiency of the enzyme argininosuccinate synthetase (ASS). An ASS1 deficiency demonstrates fatal clinical manifestations that are characterized by the neonatal metabolic coma and early death when untreated. It causes a broad spectrum of effects, ranging from a mild disorder to a severe mental retardation, epilepsy, neurologic deficits. An acute neonatal form is the most common. Infants are normal at birth followed by an acute illness characterized by vomiting, lethargy, seizures and coma. These medical problems are life-threatening in many cases. A later onset form is less frequent and may be milder than the neonatal form. This later-onset form is associated with severe headaches, visual dysfunction, motor dysfunction, and lack of energy. Citrullinemia type1 is caused by mutations in the ASS1 gene located on chromosome 9q34.1 that encodes argininosuccinate synthetase, the third enzyme of the urea cycle catalyzing the formation of argininosuccinic acid from citrulline and aspartic acid. The enzyme is distributed in tissues including liver and fibroblasts. This mutation leads to hyperammonemia, arginine deficiency and elevated citrulline level. In the urea cycle, argininosuccinate synthetase catalyses the conversion of citrulline and aspartate to argininosuccinate.. Here, we describe a female newborn patient with lethargy, rigidity and hyperammonemia who was diagnosed as citrullinemia type1 with a c.[421-2A>G], c.[1128-6_1188dup] mutation.
The anticancer and immunomodulatory activities of low molecular weight (Mw 11 kDa) fucoidan isolated from Hizikia fusiforme (H. fusiforme) via the ultrasonification extraction process were assessed in this study. Low molecular weight fucoidan improved the growth of human B and T cells, up to approximately 40% as compared to the controls (untreated) and 30% for commercially available fucoidan (Mw 150 kDa). IL-6 and TNF-$\alpha$ were secreted from human B cells at levels of $7.8\times10^{-4}$ pg/mL and $7.2\times10^{-4}$ pg/mL, respectively, and these levels were higher than the levels measured in the controls and with other high molecular weight fucoidan. It was also determined that the cytokine from human B and T cells cultivated with added fucoidan enhanced the growth of human NK cells. The fucoidan isolated from H. fusiforme showed low cytotoxicity, approximately 19%, after the addition of 1.0 mg/mL, the highest tested concentration. The growth of human lung cancer cells (A549) and human breast cancer cells (MCF-7) were inhibited by 69.8% and 83.3%, respectively. These results demonstrated that the low molecular weight fucoidan isolated from H. fusiforme has potential as a new functional food component that evidences immunomodulatory activities and anticancer activity. One of the primary positive features of this fucoidan is that low molecular weight polysaccharides can be readily handled during processing.
The aim of this study was to develop hydroponic-cultured ginseng vinegar (HGV) containing ginsenoside Rg2 in order to its anti-obesity and anti-hyperlipidemic effects in C57BL/6J mice. HGV was prepared by two-stage fermentation. The ginsenoside Rg2 contained in acetic acid-fermented HGV increased by 4.0 times compared to that in pre-fermented HGV. To measure the anti-obesity effect of HGV, thirty two mice were randomly divided into four groups: normal diet group (ND), high-fat diet group (HFD), high-fat diet-supplemented with HGV group (HGV), and high-fat diet-supplemented with green tea extract group (GT). Body weight, fat weight, and liver weight decreased in the HGV group. The HGV group also showed lower plasma levels of low-density lipoprotein (LDL)-cholesterol and triglycerides, and higher levels of high-density lipoprotein (HDL)-cholesterol compared to the corresponding levels in the HFD group. Furthermore, there were significant decreases in plasma aspartase aminotransferase (AST) and alanine aminotransferase (ALT) levels in the HGV group compared to the corresponding levels in the HFD group. These results suggest that HGV can be used as an anti-obesity therapeutic agent or functional ingredient.
Journal of the Korean Society of Marine Environment & Safety
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v.21
no.6
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pp.662-671
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2015
As the type of Hazardous and Noxious Substances(HNS) becomes various and the transport volume of HNS increases, HNS spill incidents occur frequently on land and the sea. In view of various damages to human lives and properties by HNS spills, it is necessary to educate and train professional personnel in preparation for and response to potential HNS spills. This study shows the current state of response systems and education courses against HNS spill incidents on land and the sea to compare those with each other between land and sea in Korea. Incident command system on land are basically similar to that at sea, but leading authority which is responsible for combating HNS spills at sea is changeable depending on the location of HNS spill, as it were, Korea Coast Guard(KCG) is responsible for urgent response to HNS spill at sea, while municipalities are responsible for the response to HNS drifted ashore. Education courses for HNS responders on land are established at National Fire Service Academy(NFSA), National Institute of Chemical Safety(NICS), etc., and are diverse. Education and training courses for HNS responder at sea are established at Korea Coast Guard Academy(KCGA) and Marine Environment Research & Training Institute(MERTI), and are comparatively simple. Education courses for dangerous cargo handlers who work in port where land is linked to the sea are established at Korea Maritime Dangerous Goods Inspection & Research Institute(KOMDI), Korea Port Training Institute(KPTI) and Korea Institute of Maritime and Fisheries Technology(KIMFT). Through the comparison of education courses for HNS responders between land and sea, some recommendations such as extension of education targets, division of an existing integrated HNS course into two courses composed of operational level and manager level with respective refresh course, on-line cyber course and joint inter-educational institute course in cooperation with other relevant institutes are proposed for the improvement in education courses of KCG and KOEM(Korea Marine Environment Management Corporation) to educate and train professionals for combating HNS spills at sea in Korea.
Lee Min-wha;Lee Tai-hee;Ahn Bong-whan;Park Byung-ju;Yang Sung-yeul
Proceedings of the Ginseng society Conference
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1984.09a
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pp.83-88
/
1984
It is now well established that the rodenticide Vacor (N-3-pyridyl-mehtyl-N'-p-nitropheny-lurea) causes a hyperglycemia in human and rats. It is also reported that there are some components (DPG-3) in ginseng radix which cause hypoglycemic effect on alloxan diabetic mice. In the present study, attempts were made to demonstrate in Vacor-poisoned rats the hypo-glycemic activity of red ginseng component(RGC), which was extracted by Kimura's DPG-3 extraction procedure and found to be effective for lowering a hyperglycemia in alloxan-diabetic rats. Vacor in a dose of $LD_{50}$ (10mg/kg) produced a glucose intolerance with a paradoxical moderate increase in blood immunoreactive insulin and derangement in glucose metabolism of epididymal adipocytes in rats. Although RGC (20mg/kg, i.p.) did not exert any significant influence on a hyperglycemia induced by large lethal doses (25mg/kg) of Vacor ingestion, it improved the LDso Vacor-induced glucose intolerance and caused a further increase in blood insulin levels in Vacor-poisoned rats. The administration of RGC (20mg/kg, i.p.) normalized Vacor-induced depression of glucose metabolism and lipogenesis in the epididymal adipocytes with an improvement of reduced responses to insulin of adipocytes from Vacor-poisoned rats. These results suggest that some red ginsneng components contained in RGC fraction normalize the depressed peripheral glucose unitlization and insulin response and eventually lead to an improvement of abnormal glucose tolerance developed in rats poisoned with small doses of Vacor.
Purpose: Various treatment techniques have been attempted for the radiotherapy of anal cancer because of acute side effects such as perineal skin reactions. This study was performed to investigate an optimal radiotherapy technique in anal cancer. Materials and Methods: The study subjects included 35 patients who underwent definitive concurrent chemoradiotherapy for anal cancer in Yonsei Cancer Center between 1990 and 2007. The patients' clinical data, including irradiation technique, were reviewed retrospectively. The primary lesion, regional lymph nodes, and both inguinal lymph nodes were irradiated by $41.4{\sim}45\;Gy$ with a conventional schedule, followed by a boost does to the primary lesion or metastatic lymph nodes. The radiotherapy technique was classified into four categories according to the irradiation field and number of portals. In turn, acute skin reactions associated with the treatment interruption period were investigated according to each of the four techniques. Results: 28 patients (80.0%) had grade 2 radiation dermatitis or greater, whereas 10 patients (28.6%) had grade 3 radiation dermatitis or greater during radiotherapy. Radiation dermatitis and the treatment interruption period were relatively lower in patients belonging to the posterior-right-left 3 x-ray field with inguinal electron boost and in patients belonging to electron thunderbird techniques. The interruption periods were $8.2{\pm}10.2$ and $5.7{\pm}7.7$ for the two technique groups, respectively. Twenty-seven patients (77.1%) went into complete remission at 1 month after radiotherapy and the overall 5 year survival rates were 67.7%. Conclusion: Field size and beam arrangement can affect patients' compliance in anal cancer radiotherapy, whereas a small x-ray field for the perineum seems to be helpful by decreasing severe radiation dermatitis.
Background : Tumor angiogenesis is required for tumor growth and metastasis. In this study, we investigated the correlation between the intensity of angiogenesis and stage, nodal status, histologic type, metastasis and survival rate of non-small cell lung cancer. Method : Formalin fixed, paraffin embedded surgical specimens of 45 patients who had surgically resected primary non-small cell lung cancers without pre or post operative adjuvant chemotherapy or radiotherapy were examined. The microvessel count(MVC) was demonstrated by immunohistochemical staining for CD31(platelet endothelial cell adhesion molecule, PECAM). Results : Microvessel counts(MVCs) in stage IIIA and IIIB were higher than in stage I and II(p<0.05). The MVC in patients with lymph node metastasis was higher than that in patients without lymph node metastasis, although the difference was not statistically significant(p>0.05). However, in adenocarcinoma, the MVC in patients with lymph node metastasis was significantly higher than that seen in patients without lymph node metastasis(p<0.05). The MVC in adenocarcinoma was higher than that in squamous cell carcinoma(p<0.05). The difference between the MVCs of adenocarcinoma and squamous cell carcinoma was not statistically significant in stage I and II or N0 stage(p>0.05). However, in stage IIIA and IIIB or N1~3 stage, the MVC in adenocarcinoma was higher than that in squamous cell carcinoma(p<0.05). MVC was more increased when metastasis developed within 12 months. In the same histologic type and stage, the duration of survival time in patients with high MVC was shorter than in patients with low MVC, however the difference was not statistically significant(p>0.05). The survival rate in patients with high MVCs was lower than that in patients with low MVCs(P<0.05). Conclusion : In non-small cell lung cancer, MVC correlated relatively well with pathologic stage, nodal status(limited in patients with adenocarcinoma), histologic type, postoperative metastasis and survival rate. However, in the same histologic type and stage, MVC was not significantly related to the duration of survival. Therefore the assessment of the intensity of angiogenesis in non-small cell lung cancer may be helpful in predicting prognosis and in selecting patients for systemic adjuvant therapy of potential metastasis according to the results.
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