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Novel Methylation Biomarker for Non-invasive Diagnostics in Lung Cancer
오태정,( Chang Hun Lee2 ),( Min Ki Lee ),( Yeul Hong Kim ),( Sang Yull Lee ),( Hyo Sung Jeon ),( Shin Yup Lee ),( Seung Soo Yoo ),( Jae Yong Park ),( Sung Whan An ) 대한결핵 및 호흡기학회 2012 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.114 No.-
To identify aberrantly hypermethylated DNA in lung cancer cells we established a genome-wide analysis for hypermethylation sites, namely Methyl DNA Isolation and Amplification (MeDIA) coupled-CpG microarray analysis. In the comprehensive methyaltion profiling analysis between human lung cancer, A549 cells and normal NHBE cells, we observed that several clusters of genes show a significant level of aberrancy in CpG island methylation pattern in cancer cells compared to normal cells. We further identified PCDHGA12 gene as a new marker of non-invasive diagnostics for lung cancer based on followings. 1) Transcription of PCDHGA12 gene is reactivated after treatment of A549 cells with demethylating agent. 2) Bisulfide clonal-sequencing reveals that CpG island of PCDHGA12 shows a distinctive differential methylation between two cell lines. 3) Pyrosequencing-based quantitative methylation assay for such region in tumor and non-tumorous tissues from lung cancer patients shows aberrant hypermethylation in 37 (92%) of the 40 tumor tissues. In clinical validation by pyrosequencingin induced-sputum of lung cancer patients (n=87) and healthy controls (n=51), we observed aberrant hypermethylation incident at significantly elevated level in samples derived from lung cancer patients. According to the optimal threshold calculated by ROC curve analysis, sensitivity and specificity of PCDHGA12 was 86.2% and 82.4%, respectively. PCDHGA12 methylation status could be a potential methylation biomarker alone or combined with others for the screen and the detection of relapse of lung cancer.
Synthesis of Vanadium Powder by Magnesiothermic Reduction
Lee, Dong Won,Lee, Hak Sung,Yun, Jung Yeul,Kim, Young Ho,Wang, Jei Pil Trans Tech Publications, Ltd. 2014 Advanced materials research Vol.1025 No.-
<P>Vanadium metal powder was successfully synthesized by combination reduction process with hydrogen gas and liquid magnesium. V2O5 as a raw material was first reduced by hydrogen gas to produce V2O3 at 873K for 3 hours and then it was reduced by liquid magnesium at 1,073K for 48 hours to become final vanadium powder. The microstructure and chemical composition of pure vanadium powder fabricated were examined by SEM(Scanning Electron Microscopy) and EDX(energy dispersive spectroscopy), respectively. The oxygen content of vanadium powder was finally found to be 0.5 wt.% showing the structure loosely agglomerated with fine particles of about 1~2μm.</P>
( Sang Il Choi ),( Myeong-cherl Kook ),( Sanghyun Hwang ),( Young-il Kim ),( Jong Yeul Lee ),( Chan Gyoo Kim ),( Il Ju Choi ),( Hyewon Lee ),( Hyeon Seok Eom ),( Soo-jeong Cho ) 대한간학회 2018 Gut and Liver Vol.12 No.3
Background/Aims: Mucosa-associated lymphoid tissue (MALT) lymphoma of the stomach is an uncommon disease. Bone marrow involvement is reported even in patients with only a mucosal lesion. We evaluated the prevalence and risk factors of marrow involvement and its implications for diagnosis and treatment. Methods: In total, 132 patients who were diagnosed with gastric MALT lymphoma at the National Cancer Center in Korea between January 2001 and December 2016 were enrolled in the study. The patient data were collected and analyzed retrospectively. Results: Of the 132 patients, 47 (35.6%) were male, with a median age of 52 years (range, 17 to 81 years). The median follow-up duration was 48.8 months (range, 0.5 to 169.9 months). Helicobacter pylori infection was detected in 82 patients (62.1%). Most patients (80.3%) had stage IE1 according to the modified Ann Arbor staging system. Ninety-two patients underwent bone marrow evaluation, and four patients (4.3%) had marrow involvement. Of these patients, one presented with abdominal lymph node involvement, while the other three had stage IE1 disease if marrow involvement was disregarded. All three patients had no significant symptoms and were monitored after local treatment without evidence of disease aggravation. Conclusions: Bone marrow involvement was found in 4.3% of the patients with gastric MALT lymphoma. Bone marrow examination may be deferred because marrow involvement does not change the treatment options or outcome in gastric MALT lymphoma confined to the stomach wall. (Gut Liver 2018;12:278-287)
Nickel powders recycled from invar scrap by magnesiothermic reduction.
Lee, Jin-Seok,Lee, Dong-Won,Lee, Hak-Sung,Yun, Jung-Yeul,Wang, Jei-Pil American Scientific Publishers 2014 Journal of Nanoscience and Nanotechnology Vol.14 No.12
<P>A study on the recovery of nickel from Fe-Ni alloy scrap was conducted using molten magnesium by dissolving only Ni component and then removing Mg using vacuum distillation method. The recovering faction of nickel higher than 99% was achieved at temperatures above 1,073 K and 99.5% of purity level of nickel was successfully obtained under vacuum degree of 10(-5) torr at temperatures above 1,273 K. The purity, phase, and recovery rate of nickel were examined by scanning electron microscopy, elemental analyser, and X-ray diffraction.</P>
The Mechanism of Antibacterial Activity of Tetrandrine Against <i>Staphylococcus aureus</i>
Lee, Young-Seob,Han, Sin-Hee,Lee, Su-Hwan,Kim, Young-Guk,Park, Chung-Berm,Kang, Ok-Hwa,Keum, Joon-Ho,Kim, Sung-Bae,Mun, Su-Hyun,Seo, Yun-Soo,Myung, Noh-Yil,Kwon, Dong-Yeul Mary Ann Liebert 2012 Foodborne pathogens and disease Vol.9 No.8
A review of atopic dermatitis in traditional Chinese medicine
Lee, Sang-Chang,Lee, Young-Seob,Seong, Man-Jun,Choi, Mi-Sun,Kang, Suk-Hoon,Lee, Sheng-Ho,Kim, Jong-Hak,Kim, Min-San,Kwon, Dong-Yeul 대한한약학회 2008 Journal of oriental pharmacy Vol.1 No.2
Herbal medicines have an accurate effect on atopic dermatitis, and at the same time, they hardly have adverse reactions. However, herbal medicines are difficult to be quantitatively analyzed due to low-quality preparation and types. In addition, herbal medicines have raised many problems as they have not been standardized and their active components have not been analyzed. Patients with atopic dermatitis began to recognize the effectivity and safety of herbal medicines. Accordingly, standardization, biological analyses, animal experiments and clinical trials should be generally performed in order that herbal medicines may be recognized all over the world. A standard, which is to objectively judge the curative effect of atopic dermatitis, should be established as soon as possible. Case studies and RCTs (Randomized Controlled Trials) should be actively performed on the basis of rigid clinical trial design to the end that the curative effect of herbal medicines is recognized all the world over.
Lee, Ju-Suk,Kim, Ye-Jin,Ryu, Ki-Hyun,Han, Tae-Ho,Park, Kuen-Woo,Chung, Kyu-Hwan,Lee, Chan,Lee, Gung-Pyo,Kim, Sun-Hyung,Hong, Jin-Sung,Park, Young-Doo,Woo, Eun-Taeck,Park, Sung-Chul,Son, Dae-Yeul 한국원예학회 2012 Horticulture, Environment, and Biotechnology Vol.53 No.2
Pollen of genetically modified (GM) pepper containing the gene for cucumber mosaic virus (CMV) coat protein (CP) and GM Chinese cabbage with high phenylethylisothiocyanate (PEITC) content was investigated for assessment of allergic risk. Amino acid (AA) sequences of the inserted gene products of GM virus resistant pepper and GM Chinese cabbage with high PEITC content were compared with those of known allergens. No known allergen greater than 35% AA sequence homology, over 80 AA window or more than 8 consecutive identical AA was found. Protein patterns of GM/non-GM pepper and Chinese cabbage pollen extracts in SDS-PAGE analysis showed the same distribution of protein bands among the GM and non-GM pepper or Chinese cabbage, respectively. Sera from pollen allergic patients showed some IgE reactivity via immunoblotting and ELISA; however, no differences were observed between the pollen of GM and non-GM pepper or Chinese cabbage, respectively. Based on these results, we conclude that pollens of the virus resistant GM pepper and GM Chinese cabbage with high PEITC have no differences in their protein composition or allergenicity relative to non-GM pepper and Chinese cabbage.
Lee, Doo Yeul,Park, Joong-Won,Kim, Tae Hyun,Lee, Ju Hee,Kim, Bo Hyun,Woo, Sang Myung,Kim, Sang Soo,Lee, Woo Jin,Kim, Dae Yong,Kim, Chang-Min Urban Vogel 2015 STRAHLENTHERAPIE UND ONKOLOGIE Vol.191 No.11
<P>To identify prognostic indicators in patients treated with radiotherapy (RT) for metastases from hepatocellular carcinoma (HCC) in abdominal lymph nodes (LNs).</P>
Lee Sang Hun,Lee Kyu-Yeul,Woo Yoonwhan,Lee Kang-Soo The Korean Society of Mechanical Engineers 2005 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.19 No.2
We propose a feature-based multi-resolution representation of B-rep solid models using history-based Boolean operations based on the merge-and-select algorithm. Because union and subtraction are commutative in the history-based Boolean operations, the integrity of the models at various levels of detail (LOD) is guaranteed for the reordered features regardless of whether the features are subtractive or additive. The multi-resolution solid representation proposed in this paper includes a non-manifold topological merged-set model of all feature primitives as well as a feature-modeling tree reordered consistently with a given LOD criterion. As a result, a B-rep solid model for a given LOD can be provided quickly, because the boundary of the model is evaluated without any geometric calculation and extracted from the merged set by selecting the entities contributing to the LOD model shape.
Systemic immunity of obese-diabetes model (db/db) mice
Lee, Sang-Eun,Jang, Ik-Soon,Park, Jun-Soo,Lee, Ji-Hae,Lee, Seung-Yeul,Baek, So-Young,Lee, Seung-Hoon,Lee, Hyun-Ah The Korean Society of Toxicogenomics and Toxicopro 2010 Molecular & cellular toxicology Vol.6 No.2
Obesity has recently been defined as a chronic inflammatory disease and is considered as a major cause of adult health problems including incurable diseases like diabetes and cancer. In this study, the systemic immunity, including the innate and adaptive immunity parameters, of naturally occurring (leptin receptor mutation) obesity-diabetes mice (db/db) was examined to increase our knowledge of these mice for obesity-related studies. Severe fatty liver with blood engorgement was observed in the db/db mice. Compared to background C57BL/6J mice, the adaptive immunity, as measured by mitogen-induced T and B cell proliferation and cytokine release, was significantly suppressed in db/db mice. However, significant upregulation of innate immune-inflammatory parameters including macrophage function and NK cell activity was observed in db/db mice without external stimulation. These data conclusively confirm the systemic immune-inflammatory micro-environment with suppressed adaptive immunity of db/db mice, which may cause the secondary obesity-related life-threatening diseases like diabetes or cancer.