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상기도 감염 후 연하곤란을 호소한 제 9, 10 뇌신경 마비
박호용 ( Ho Yong Park ),이오영 ( Oh Young Lee ),양선영 ( Sun Young Yang ),천승민 ( Seung Min Cheon ),이항락 ( Hang Lak Lee ),한동수 ( Dong Soo Han ),전용철 ( Yong Cheol Jeon ),손주현 ( Joo Hyun Sohn ),윤병철 ( Byung Chul Yoon ) 대한소화기기능성질환·운동학회 2005 Journal of Neurogastroenterology and Motility (JNM Vol.11 No.1
Oropharyngeal dysphagia is characterized by difficulty in transferring food from the mouth through the upper esophageal sphincter into the upper esophagus. Lesions involving the vagus and glossopharyngeal nerve may cause dysphagia and dysphonia. On rare o
한성희 ( Sung Hee Han ),이오영 ( Oh Young Lee ),양선영 ( Sun Young Yang ),전대원 ( Dae Won Jun ),이항락 ( Hang Lak Lee ),전용철 ( Yong Cheol Jeon ),한동수 ( Dong Soo Han ),손주현 ( Joo Hyun Sohn ),윤병철 ( Byung Chul Yoon ),최호순 대한소화기학회 2006 대한소화기학회지 Vol.48 No.1
In Crohn`s disease, neurologic complications such as cerebrovascular accident, headache, peripheral neuropathy have been reported sporadically. The pathogenesis of these neurologic complications is still unknown and controversial. We experienced a 22-year-old man, with Crohn`s disease accompanied by optic neuritis. Loss of visual acuity was developed during the worsening course of enterocutaneous fistula. After high dose steroid treatment, his visual acuity and neurologic symptoms improved immediately. (Korean J Gastroenterol 2006;48:42-45)
대장 선종의 위험 인자로 복부 비만 및 인슐린 저항성에 대한 연구
이항락 ( Hang Lak Lee ),손병관 ( Byoung Kwan Son ),이오영 ( Oh Young Lee ),전용철 ( Yong Chul Jeon ),한동수 ( Dong Soo Han ),손주현 ( Ju Hyun Sohn ),윤병철 ( Byung Chul Yoon ),최호순 ( Ho Soon Choi ),함준수 ( Joon Soo Hahm ),이민 대한소화기학회 2007 대한소화기학회지 Vol.49 No.3
목적: 대장암은 유전 소인, 흡연, 음주, 식습관 등의 환경인자가 작용하여 발생하며 또한 비만, 고지혈증, 고혈당, 고인슐린 혈증 및 인슐린 저항성이 대장암의 발암과정과 연관이 있다. 다양한 비만 지표를 이용해서 대장 선종과 비만 및 인슐린 저항성과의 연관성을 알아보고자 하였다. 대상 및 방법: 2004년 1월부터 2004년 10월까지 한양대학병원에서 검진 목적으로 대장내시경검사와 기타 검사를 시행 받은 환자를 대상으로 전향적으로 환자 대조군 연구를 시행했다. 크기가 0.5 cm 이상이며 조직학적으로 대장 선종이 증명된 50명의 환자를 대상으로 했으며, 대조군은 동일 기간 중 대장내시경검사를 시행 받았으나 특이 병변이 없었던 자로 정했다. 결과: 인슐린, 공복혈당, 총 콜레스테롤, triglyceride, LDL, HDL 수치, 수축기 및 이완기 혈압은 환자군에서 모두 증가되었으나 환자군과 대조군 사이에 유의한 차이는 없었다. HOMA-IR은 환자군에서 인슐린 저항성 수치가 높았으나 통계적인 유의성은 없었다. 그러나 체질량지수, 복부 비만, 체지방, 비만도는 환자군이 대조군 보다 유의하게 높았다. 다변량 분석에서 복부 비만이 가장 의미 있는 위험 인자였으며 체질량지수가 증가함에 따라 대장 선종의 위험도도 증가했다. 체지방, 비만도 역시 중요한 위험 인자였다. 결론: 비만과 대장 선종의 연관성에서 복부 비만이 가장 중요한 위험 인자였으며 복강 내 지방조직이 중요한 역할을 할 것으로 기대한다. 향후 대규모의 환자 대조군 및 코호트 연구가 필요하며 복강 내 지방의 역할에 대한 분자생물학적인 연구가 필요하다. Background/Aims: Abdominal obesity and hyperinsulinemia or insulin resistance are of interest in connection with colon carcinogenesis. We conducted a prospective case controlled study for the evaluation of relationship between abdominal obesity, insulin resistance, and colorectal adenoma. Methods: Fifty patients with colorectal adenoma and fifty healthy subjects were included in this study. Total colonoscopic examinations were performed in all the subjects. Fasting blood sugar (FBS), insulin, homeostasis model assessment (HOMA-IR), triglyceride (TG), cholesterol (CROL), BMI (body mass index), WHR (waist hip ratio), percent body fat (PBF) and obesity degree (OD) were measured. HOMA-IR was considered to represent insulin resistance. Diabetic patients were excluded from this study. Results: There were no differences in sex, serum insulin, FBS, HOMA-IR, TG, CROL between adenoma and control group. Subjects with high BMI, WHR, percent body fat, and obesity were more likely to have colonic adenoma. Multiple logistic regression analysis after adjusting confounding factors, had revealed that WHR was the most important independent risk factor for colon adenoma. Conclusions: Abdominal obesity was most closely related to colonic adenoma. However, insulin resistance was not related to colonic adenoma. A larger case controlled study is needed. (Korean J Gastroenterol 2007;49:147-151)
박세우 ( Se Woo Park ),이항락 ( Hang Lak Lee ),이오영 ( Oh Young Lee ),전용철 ( Yong Chul Jeon ),한동수 ( Dong Soo Han ),윤병철 ( Byung Chul Youn ),최호순 ( Ho Soon Choi ),함준수 ( Joon Soo Hahm ) 대한소화기학회 2007 대한소화기학회지 Vol.50 No.6
Tuberculosis may affect primarily all organs and tissues of the body, although some of these show high immunity against the infection. The most common forms of non-pulmonary tuberculosis are tuberculosis of bones and joints (30%), urinary system (24%), lymph nodes (13%), sexual organs (8%), cerebrospinal meninges (4%), and alimentary system (3%). Especially, the commonest presentation of abdominal tuberculosis is ileocecal disease, but isolated appendicular involvement is also rarely seen, occuring in only 1.5% to 3% of cases in the absence of pulmonary or other abdominal involvement. The appendix may either be involoved secondary to ileocecal tuberculosis, or to tuberculosis at another site within the abdomen, or may occur in the even, rarer "isolated" form, without the evidence of disease elsewhere. We report a case of acute appendicitis underwent appendectomy and histopathologic examination of appendix revealed appendicular tuberculosis. (Korean J Gastroenterol 2007;50: 388-392)
폐고속국도의 생태복원 방안 -영동선 192.4K(인천) 지점을 중심으로-
조동길 ( Dong Gil Cho ),최재용 ( Jae Yong Choi ),전용철 ( Young Chul Jeon ) 한국환경보건기술학회(구 한국환경복원녹화기술학회) 2010 한국환경복원기술학회지 Vol.13 No.5
Expressways are often upgraded by widening the lanes and/or by reshaping the roads to be more linear for faster travel time. However, during the process of improving the route of the expressways, the areas where the old expressways used to be are often unused and abandoned. When these neglected sites are left alone, they often become dump sites causing pollution and impacting the surrounding environment. Therefore, it is important to restore the abandoned expressway sites to its full natural beauty. In this study, the abandoned expressway at the Soksa interchange in Pyungchang county, located in Kangwon province was studied for establishing the model of ecological restoration project. Considering the characteristics of the site, the target flora species was chosen to be Quercus species and the target fauna species as amphibians. After the target species were carefully chosen, each species` habitat requirements were studied in order to figure out the appropriate methods toward habitat restoration specifically for these species. In addition, to determine the most efficient method toward restoration of abandoned expressways, the study utilized the planting hole techniques, the crack techniques, and the colonization techniques. In terms of the spatial organization, public education program is incorporated at the main entrance area and the programs for experimenting, and developing vegetation and habitat restoration techniques are placed in the vicinity. In the master plan-to provide natural ecosystem at the site-ASCON (asphalt concrete) was removed first, then plans for restoration including species` habitat restoration were established. Furthermore, the project included plans for improving water quality polluted through non-point source considering the surrounding nearby road and farm lands. Finally, the study established a planning process that will experimentally apply to the abandoned expressway restoration method. In the future, there will be a continuous monitoring of the methods applied to verify if the restoration methods are effective. Also, new restoration techniques should be available according to a variety of abandoned expressways` characteristics.
홍은경(Eun Kyoung Hong),장명준(Myeong Jun Chang),강경우(Kyeong Woo Kang),전용철(Yong Cheol Jeon),이명석(Myung Seok Lee),김우중(Woo Joong Kim),심정원(Jung Weon Shim),이영철(Young Chul Rhee),정수영(Soo Yeong Jeong) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.4
Xanthogranulomatous cholecystitis is an uncommon focal or diffuse destructive inflammatory lesion of the gallbladder. It is characterized macroscopically by yellowish tumor-like mass in the wall of the gallbladder, and microscopically characterized in the early stages by a large number of foamy histiocytes and acute inflammatory cells, and in the )ater stages by increasing fibrosis. It has been usually mistaken for gallbladder cancer and often seen with stones. A case is presented in which a 59-year-old woman with clinical gallbladder cholesterol polyp was found at surgery to have a edematous and thickened wall of gallbladder, multiple black pigmented stones and 3 x 0.5cm sized yellowish mass on gallbladder bed which was confirmed later as xanthogranulomatous cholecystitis, pathologically. (Korean J Gastroenterol 1996;28:582 - 586)
간성 뇌중 환자에서 Flumazenil 의 효과 및 안정성에 관한 전향성 연구
추원석(Won Seok Choo),최호열(Ho Yul Choi),빈중선(Joong Sun Bin),최예원(Rye Won Choi),전용철(Yong Cheol Jeon),김학양(Hak Yang Kim),박충기(Choong Kee Park),유재영(Jae Young Yoo),이병철(Byung Chul Lee) 대한내과학회 1994 대한내과학회지 Vol.46 No.4
N/A Objectivea: Ther are still many controversies on the pathogenesis of the hepatic encephalopathy. Recently, it has been postulated that endogenous benzodiazepine like substance (s) may be involved in the neuroinhibitory effect of gamma-aminobutyric acid (GABA). For this reason, benzodiazepine antagonist, flumazenil, has been advocated as a new treatment for hepatic encephalopathy. Several studies reported clinical improvement of hepatic encephalopathy in patients treated with flumazenil but these were not controlled studies. Methods: To investigate the effect of flumazenil, we performed a double-blind, prospective study in the 13 patients with hepatic encephalopathy who fulfilled the inclusion criteria of the protocol. The drug was administered intravenously (flumazenil 2.2 mg bolus injection followed by a continuous infusion with a rate of 1 mg/ h or placebo) in coded vial. After the code was open, 6 patients received flumazenil and the other 7 palcebo. The ages were 36 to 61(mean 54) years and 7 were male and 6 female. The causes of liver cirrhosis were HBV related in 7, HCV related in 3, and 3 were alcoholics. Results: In the fumazenil group, 4(67%) demonstrated immediate improvement of mental state with various degrees (from stage III to II in 1 and from stage I & II to 0 in 3). The significant and immediate improvement in the electroencephalographic (EEG) findings were noted in 3(50%), In the placebo group, however, 2(29%) showed an immediate improvement in EEG findings but only one (14%) showed the immediate improvement of mental status. There was no evidence of significant adverse reaction related to the treatment. Conclusion: This study shows that the benzodiazepine antagonist flumazenil may be effective and safe in patients with hepatic encephalopathy in the immediate mangement. Long term beneficial effect may be expected by treating the patients with more convinient oral administration.
Growth Characteristics of a Pyruvate Decarboxylase Mutant Strain of Zymomonas mobilis
Xun Zhao(순 자오),Peter L. Rogers(피터 로저스),Eilhann E. Kwon(권일한),Sang Chul Jeong(정상철),Young Jae Jeon(전용재) 한국생명과학회 2015 생명과학회지 Vol.25 No.11
에탄올 생산 세균 Zymomonas mobilis에서 에탄올 생산 경로의 핵심으로 작용하는 효소인, pyruvate decarboxylase (pdc) 유전자의 불활성 실험을 통해, PDC 활성이 50% 감소된 PDC 활성 변형균주가 분리되었다. 이러한 균주들의 에탄올 탄소대사 흐름이 고부가가치 화합물인 피루브산, 숙신산 및 젖산 등으로 전환되는지를 발효실험을 통해 평가하였다. 하지만 pdc의 발현을 중지시키기 위해 cat-삽입형-pdc와 pdc-결손형 아형 유전자를 전기 천공법을 이용해 야생형 균주 ZM4의 염색체에 이식하기 위한 다수의 시도에도 불구하고, 이러한 방법을 통해 분리된 균주들은 대부분 부분적 유전자 불활성 특성을 보였으며, PDC 활성이 완전히 손실된 삭제 돌연변이 균주를 획득할 수는 없었다. PDC활성이 변형된 돌연변이 균주의 발효 실험에서, 야생형 균주와 비교 시 감소된 PDC효소 활성의 변화로 인해 기질 흡수율과 에탄올 생산율이 감소되어 피루브산 생산이 약 2.5 g l-1 정도로 증가함을 확인하였으나, 젖산과 숙신산의 생산에 현저한 농도 변화를 보이지 못했다. 이러한 결과는 Z. mobilis의 산화환원 에너지가 PDC 효소 활성에 의한 에탄올 생산 경로에 전적으로 의존하여 발생한다는 것을 암시하였다. 상기 결과를 토대로 pdc 유전자의 완전한 불활성 유도와 산화환원 에너지의 균형은, 젖산 생산을 위한 lactate dehydrogenase, 숙신산 생산을 위한 pyruvate dehydrogenase와 malic enzyme과 같은 효소의 활성 증가를 통해, 세포내 NAD와 NADH 농도의 산화환원 균형이 이루어져야 발생할 수 있음을 시사하였다. Studies of the inactivation of a gene encoding pyruvate decarboxylase, pdc, in an ethanol-producing bacterium, Zymomonas mobilis, identified a mutant strain with 50% reduced PDC activity. To evaluate the possibility of a carbon-flux shift from an ethanol pathway toward higher value fermentation products, including pyruvate, succinate, and lactate, fermentation studies were carried out. Despite attempts to silence pdc expression in the wild-type strain ZM4 using cat-inserted pdc and pdc-deleted homologs by electroporation, the strain isolated showed partial gene activation. Fermentation experiments with the PDC mutant strain showed that the reduced expression level of PDC activity resulted in decreased rates of substrate uptake and ethanol production, together with increased pyruvate accumulation of 2.5 g l-1, although lactate and succinate concentrations were not significantly enhanced in these modified strains. Despite numerous attempts, no strains were isolated in which complete pdc inactivation occurred. This result indicates that the ethanol fermentation pathway of this bacterium is totally dependent on the activity of the PDC enzyme. To ensure a redox balance of intracellular NAD and NADH levels, other enzymes, such as lactate dehydrogenase for lactate, and enzymes involved in the production of succinic acid, such as pyruvate dehydrogenase (PDH) and malic enzymes, may be needed for their increased end-product production.
김태영,박준용,박경남,한동수,이용욱,최호순,함준수,전용철,윤병철,은창수,문광호,최태열 대한소화기학회 1998 대한소화기학회지 Vol.32 No.3
Background/Aims: The detection of Helicobacter pylori (H. pylori) hoth before and after treatment is very important, but conventional methods to detect H. pylori are less specific. The aim of this study was to evaluate the efficiency of polymerase chain reaction (PCR) assay as a diagnostic method of H. pylori infection. Methods: One hundred ninety three patients were included in the study. Their biopsy specimens obtained from gastric antrum and body were submitted to PCR assay, rapid urease test (CLO test), culture, and histological examination. Results: Fifty eight percent (111 out of 193 patients) of the patients had H. pylori infection. The diagnostic sensitivity/specificity of PCR assay, rapid urease test, histological examination, and culture were 98.2%/95.1%, 95.5%/74,4%, 86.5%/98.8%, and 73.9%/100%, respectively. The positive predictive value/negative predictive value of PCR assay, rapid urease test, histological examination, and culture were 96.5%/97,5%, 83.5%/92.4%, 99%/84.4%, and 100%/73.9%, respectively. The highest sensitivity was achieved in the PCR assay, while the highest specificity was obtained in culture. Conclusions: PCR assay was proved to be the most sensitive test with high specificity for the detection of H. pylori.