반응표면분석법에 의한 머위 잎의 petasin 추출공정 최적화

이동완(Dong Wan Lee),이세열(Se Yeul Lee),정헌식(Hun Sik Chung),최영환(Young Whan Choi),임동순(Dong Soon Im),이영근(Young Guen Lee) 한국생명과학회 2013 생명과학회지 Vol.23 No.11

머위 잎에서 알레르기성 천식에 효과적 치료제로 알려져 있는 petasin을 효율적으로 추출하기 위해 반응표면분석법을 사용하여 petasin 추출공정 최적화를 실시하였다. Box-Behnken design에 따라 설정한 에탄올 농도(40-80%), 추출 rpm (125-225), 추출시간(1-3 hr)을 독립변수로 하고 추출물의 특성 즉, 추출수율과 petasin 함량을 종속변수로 하여 분석을 실시하였다. 추출물의 petasin 함량은 에탄올 농도, 추출 rpm, 추출시간의 유의적인 영향을 받으며 특히, 에탄올 농도의 영향이 크며 이의 수준이 높아짐에 따라 증가하는 것으로 나타났다. 추출조건에 따른 petasin의 거동은 유의적인 회귀식으로 설명이 가능한 것으로 확인되었다. 반응표면분석 결과, 머위 잎으로부터 petasin의 추출에 최적인 조건으로 에탄올 농도는 79.92%, 추출 rpm은 178.10, 추출시간은 2.06 hr로 각각 결정되었다. Petasin extracted from Petasites japonicus leaves has been well known to be effective in the treatment of allergic asthma. This study was carried out to optimize the extraction process of petasin from P. japonicus leaves by response surface methodology (RSM). The dried powder of P. japonicus leaves was extracted at ethanol concentrations ranging from 40% to 80%, extraction rpm ranging from 125 rpm to 225 rpm, and extraction time ranging from 1 to 3 hours. The effects of the extraction conditions on the dry yield and petasin content of the extracts were investigated using a second-order Box-Behnken design. The petasin content was significantly affected by ethanol concentration, extraction rpm, and extraction time, tending to increase more with increasing ethanol concentration. The optimum condition for petasin extraction from Petasites japonicus leaves was 79.92% in ethanol concentration, 178.10 rpm in extraction rpm, and 2.06 hours in extraction time, respectively.

증례 : 연하 유발성 심방세동 1예

이현국 ( Hyeon Gook Lee ),전국진 ( Kook Jin Chun ),이동완 ( Dong Wan Lee ),이혜정 ( Hye Jeong Lee ),김준홍 ( June Hong Kim ),홍택종 ( Taek Jong Hong ),신영우 ( Yung Woo Shin ) 대한내과학회 2005 대한내과학회지 Vol.69 No.-

저자들은 식사시작과 함께 심계항진을 주소로 내원한 63세 여자 환자에서 국내에서 아직 보고된 바 없는 연하 유발성 심방세동을 진단하였고, 약물치료로 호전되었기에 문헌고찰과 함께 보고하는 바이다. Deglutition tachyarrhythmias are rare. We report a case of atrial fibrillation triggered by swallowing. A 63 year old female presented to our hospital with a 20 day history of paroxysmal palpitations lasting approximately 5 to 10 seconds in duration and precipitated by ingestion of solids but not liquids. Cardiovascular examination, chest radiography, Echocardiography, upper GI endoscopy and thyroid function tests were normal and 24 hour ambulatory monitoring showed sinus rhythm except for numerous episodes of atrial fibrillation with rates of 150 to 200 beats/minute during meals. Most episodes spontaneously reverted to sinus rhythm within few minutes. The patient`s exercise tolerance was good with the achievement of 96% of the age predicted maximum heart rate. Her symptoms were controlled by verapamil. She is currently symptom-free with regular doses of verapamil under clinical follow-up. (Korean J Med 69:S818-S823, 2005)

Isolation and Identification of Antioxidant Compounds of Various Solvents Extracted from Eriobotrya japonica Leaves

Hyeon-Suk Ham(함현숙),Se-Yeul Lee(이세열),Dong-Wan Lee(이동완),Jong-Hwan Seong(성종환),Han-Soo Kim(김한수),Dong-Seob Kim(김동섭),Young-Guen Lee(이영근) 한국생명과학회 2012 생명과학회지 Vol.22 No.9

비파 잎의 항산화 활성을 탐색하고 활성물질을 분리하여 규명하기 위하여, 동결 건조한 비파 잎을 마쇄하여 n-hexane, ethyl acetate (EtOAc)와 methanol (MeOH)로 용매 분획하였다. 각 추출물에 대하여 정량적으로 DPPH 소거활성, SOD 유사활성을 측정하고, 페놀 화합물과 플라보노이드 함량을 측정하였으며, 각 용매에 따른 추출물 중 비교적 활성이 강한 EtOAc 추출물과 MeOH 추출물에 대하여 column chromatography를 이용하여 얻은 분획물들 중 강한 활성을 보인 각 1개의 분획물에서 3개의 화합물을 분리하였으며, GC/MS 분석에서 phytol, β-sitosterol 및 (-)-Loliolide으로 동정하였다. To investigate potential medicinal or functional uses of Eriobotrya japonica, this study focused on the isolation and identification of antioxidant compounds from Eriobotrya japonica leaves. Various solvents were extracted from the leaves, and their scavenging effect on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals was measured, in addition to their superoxide dismutase-like activity, polyphenol compounds, and flavonoid content. Ethyl acetate extract exhibited the strongest scavenging effect in a 0.2 mM solution of DPPH (63.24±2.20%, 81.83±2.10%, and 93.15±2.31% in 0.3, 0.7, and 1.0 mg/ml sample concentrations, respectively). The antioxidant effect of the ethyl acetate extract and methanol extract were generally stronger than that of n-hexane extract. The extracts were further purified by repeated silica gel column chromatography. The antioxidant compounds were identified as phytol, β-sitosterol, and (-)-loliolide using GC/MS.

간흡충 감염가토의 간내 담관에 대한 병리조직학적 및 조직화학적 연구

송근암(Geun Am Song),김진도(Jin Do Kim),이동완(Dong Wan Lee),손춘희(Choon Hee Son),양웅석(Ung Suk Yang),허윤(Yoon Hue),문한규(Han Gue Moon),유방현(Bang Hyun Liu),이선경(Sun Kyung Lee) 대한내과학회 1989 대한내과학회지 Vol.37 No.3

N/A This study was undertaken to examine the histopathological changes of the bile duct in rabbits heavily infested with Clonorchis sinensis for 6-18 months, and then to investigate the histochemical properties and compositions of epithelial mucosubstances. In 9 rabbits, each rabbit was orally infested with about 500 metacercariae and was sacrificed when general conditions were poor. The specimens were stained with H-E, PAS, alcian blue (pH 2.5), alcian blue (pH 1.0), alcian blue (pH 2.5) -PAS, and FITC- conjugated lectins. The results obtained were as follow 1) The pathological changes in the infested rabbits were papillary and adenomatous hyperplasia, goblet cell and mucus-cell metaplasia, ductal wall fibrosis, and infiltration of eosinophils in the ductal wall, and then the metaplasia of ductal epithelium was more marked in the deep gland than in the surface. 2) The epithelial mucosubstances in the normal intrahepatic bile duct were produced in the border and supranuclear portion of the epithelium. The histochemical composition of these was a mixture of neutral and acid mucosubstances with a predominant acid group. 3) In infested rabbits, the epithelial mucosubstances were produced in the border and supranuclear portion of the covering epithelium, goblet cell, and hyperplasia and metaplasia cells of the deep gland. The mucosubstances were much more produced in the goblet cell, hyperplasia and metaplasia cell of deep gland, and the composition was mixture of neutral and acid substances with a predominance of the neutral group in goblet cell and adenomatous hyperplasia, and a predominance of the acid group in mucus-cell metaplasia of the deep gland. 4) In the normal intrahepatic bile duct, labeling of FITC-conjugated lectins of WGA and Con-A was weakly localized in the border of the epithelium and its grade was trace. 5) In infested rabbits, F1TC-WGA and FITC-Con-A labeling was seen in the border and supranuclear portion of the covering epithelium, goblet cell, and hyperplasia and metaplasia cells of the deep gland, but FITC-PNA and FITC-SBA labeling was graded from zero to trace. 6) Mucin secreting cell metaplasia stained by PAS and AB showed very significant labeling of E1TC-WGA and FITC-Con-A, which are lectins that are highly specific in their recognition of glycosylated residues.

상부 위장관 내시경 검사의 전처치 약물에 대한 고찰

강영진,양웅석,송근암,이동완 대한소화기내시경학회 1988 Clinical Endoscopy Vol.8 No.1

In order to assess the effects of diazepam and meperidine as premedication for upper gastrointestinal endoscopy, eighty eight patients undergone an elective upper gastrointestinal endoscopy were studied. Studied patients were divided into two groups; one group was premedicated with buscopan and stropine(group I), and the other group was premedicated with diazepam and meperidien (group II). The results obtained were summarized as follows; 1) 83.0% of the group II (44/53) did not eomplain any discomfort by the procedure, but only 23.9% (8/35) of the group I showed no discopmort. The difference between two groups is statiatieally significant (p<0.005). 2) In 41 patients with previous experience of endoscopy, 22 patients from 27 of the graup Il(81.5%) did not feel any discomfort but it wes only 3 patients among 14 of the group I (21.4%) who did not feel discomfart (p<0,005). 3) In 47 patients without previous experience of endoscopy, 23 patients from 26 of the group II (88. 5%) did not show discomfort but it way only 5 patients among 21 of the group I (23.7%) (p<0.005). 4) In the patients with previous experience of endoscopy, 21 patients among 27 of the group II (77. 8%) felt better than that of the previous experience but it was only 3 patients among 14 of the group I (21.4%) (p<0.005). From the above results, we would emphasize that it is more effective to use diazepam and, meperidien as premendication for the gastrointestinal endoscopic procedure since it removes pstients apprehension rendering them a good cooperation with very minimal side effects,

간농양을 유발한 Sparganosis 1 예

문한규,허윤,송철수,이동완,강필중,문원국,양웅석,송수복 대한내과학회 1990 대한내과학회지 Vol.39 No.5

Sparganosis, an infection transmitted to humans by sparganum, was first reported by Manson at 1882. Many cases have been reported in korea, the sites are subcutaneous tissue, fascia, body cavities, urinary tract, orbit, brain, and spinal canal. This 59-year-old male, who had a history of having eaten snakes frequently 15-20 years ago, suffered from right upper quadrant pain and intermittent fever and chills. An abdominal ultrasound revealed an echolucent area on the right lower lobe of the liver. Aspiration was done, and through a drainage tube, the parasite was expelled. On parasitologic evaluation, sparganum was confirmed. It was the first report of sparganum found in liver parenchyme in korea. We report a case of sparganosis combined with liver abscess with a review of the literature,

내시경적 담석 제거술의 임상적 고찰

문한규,양웅석,유방현,송근암,이동완,허윤 대한소화기내시경학회 1988 Clinical Endoscopy Vol.8 No.2

Endoscopic sphincterotomy (E.S.T.) has relatively low complications and is the theraphy of choice in patients with common bile duct stones. It is also an useful technique for decompression of biliary tract obstruction. Thirty two cases of patients were selected according to opedrative risks: old age, severe jaundice and recurrent or retained bile duct stones after cholecystecomy from 1986 to 1988. The results were as follows, 1) In thirty two cases nf E.S.T., male to female ratio was 1:1.46. Most frequent age was older than 40 years. (male, 84.6%, female, 84.2%). 2) Out of thirty two cases, 20 cases (62.5% were under post clholecystectomy state, 12 eases (37.5%) were obstructive jaundice. 3) Spontaneous stone passage after E.S.T. was 81.3% (26 cases), and total stone remoral rate was 87.5% (28 cases), 4) Complications of E.S.T. were noted in three cases. In the two cases of bleeding, it was spontaneously improved and a case of acute pancreatitis was treated by medical care.

잔유 총수담관 결석에 대한 담도내시경 직시하 Electrohydaulic Lithotripsy (EHL) 1예

김진도,강대환,양웅석,조몽,도창호,이동완,허윤,문한규 대한소화기내시경학회 1990 Clinical Endoscopy Vol.10 No.2

Electrohydraulic lithotripsy (EHL) is a method used to breakup the stone by electric discharge in the presence of liquid medium. Recently we experienced a case of successful common bile duct stone removal after EHL during choledochoscopy via T-tube tract, which was the first case of EHL in biliary tract stone in Korea. A 65-year-old female patient was admitted to our hospital because of generalized pruritus after cholcystectomy with T-tube insertion. Obtained cholangiogram showed retained CBD stone which was implssible to remove by Dormian basket and tto dissolute by monooctanoin. After only one session of EHL, we can disintergrat CBD stone into several small pieces and removal of stone was easily done by Basket. After Small cut endoscopic sphincterotomy (EST) remained distal impacted stone was freely passed and control choledochoscopy and cholangiogram showed no remained stone. We think that EHL may be play a potential role in removal of biliary tract stones as in urinary tract stones.