Kocat-D1의 streptozotocin으로 유도한 당뇨모델에 대한 항당뇨 활성

원혜진(Hye-Jin Won),이현순(Hyun-Sun Lee),김종탁(Jong-Tak Kim),홍충의(Chung-Oui Hong),구윤창(Yun-chang Koo),이광원(Kwang-Won Lee) 한국식품과학회 2010 한국식품과학회지 Vol.42 No.2

STZ으로 당뇨를 유발 8주 후 당뇨대조군은 공복혈당이 451±42.6 ㎎/㎗인데 비해 Kocat-D1-1(Kocat-D1 추출물을 0.25 g/㎏/day 투여한 군)에서는 334.3±32.9 ㎎/㎗, Kocat-D1-2(Kocat-D1 추출물을 1 g/㎏/day 투여한 군)에서는 259.5±35.0 ㎎/㎗로 투여 농도에 의존적으로 당뇨대조군에 비해 유의적 수준으로 혈당이 낮아졌다. OGTT 검사에서도 180분 경과 후에도 당뇨대조군은 포도당 투여 전보다 혈당이 55.5±5.1 ㎎/㎗ 높았으나 Kocat-D1-2는 17.0±7.4㎎/㎗로 유의적으로 낮아졌다. STZ에 의해 유도된 당뇨쥐는 정상대조군에 비해 혈장내의 GOT(411.3±31.3 U/L), GPT(162.3±23.2 U/L) 모두 현저히 증가하였다. 이에 비해 Kocat-D1-2 군에서는 GOT(247.0±33.4 U/L), GPT(116.3±17.4 U/L) 모두 유의적인 수준으로 당뇨대조군에 비해 감소하였다. 알부민 수치 또한 정상 대조군 3.9±0.1 U/L에 비해 당뇨대조군은 2.7±0.3 U/L으로 낮아졌으나 Kocat-D1-2군에서는 3.0±0.1 U/L로 증가하였다. HDL-콜레스테롤 수치 또한 정상대조군이 26.8±3.9 ㎎/㎗인데 비해 당뇨대조군은 11.7±1.3 ㎎/㎗로 낮아졌다. 그러나 Kocat-D1을 투여한 두군 모두 각각 22.3±2.0, 26.8±1.2 ㎎/㎗로 유의적인 수준으로 증가하였다. 간조직의 조직학적 관찰에서도 당뇨대조군의 경우 간세포사이에 지방구가 관찰되었으나, Kocat-D1-2는 거의 정상대조군과 유사하였으며 지방구를 관찰 할 수 없었다. 각 실험군의 혈액 중 인슐린 농도를 측정한 결과 정상대조군 0.18±0.02 ng/㎖인데 비해 당뇨대조군은 0.05±0.04 ng/㎖로 낮아졌으나 Kocat-D1-1은 0.11±0.05, Kocat-D1-2는 0.13±0.02 ng/㎖로 증가하였다. 췌장의 베타세포의 상대적 용적을 측정한 결과 Kocat-D1-2 군은 당뇨대조군의 12.9±7.9%에 비해 49.4±4.2%로 유의적인 수준으로 증가하였다. Kocat-D1-1군에서도 당뇨대조군보다 증가하는 경향은 보였으나 유의적인 차이는 없었다. Kocat-D1은 인슐린을 분비를 촉진시켜 혈당을 강하시키는 항당뇨효과를 가지고 있음을 알 수 있었다. 따라서 아직 명확한 학명 규명이 규명되지는 않았지만 Kocat-D1은 의약품 소재 및 기능성 식품 소재로서의 활용가능성이 있음을 본 연구를 통해 확인하였다. This study was conducted to investigate the anti-diabetic activity of Kocat-D1, which is widely used in traditional medicine to treat diabetes in Shandong, China. Sprague Dawley rats (8 weeks of age) were separated into 4 groups: a normal control, streptozotocin (STZ)-induced diabetic rat group (DM control), Kocat-D1-1 (diabetic rat treated with 0.25 g/㎏/day hot water extract), and Kocat-D1-2 (diabetic rat treated with 1 g/㎏/day hot water extract). After eight weeks of treatment, the fasting blood glucose levels of the Kocat-D1-1 (334.3±32.9 ㎎/㎗) and Kocat-D1-2 group (259.5±35.0 ㎎/㎗) were significantly lower when compared to the DM control group (451±42.6 ㎎/㎗). Furthermore, the levels of glutamate oxaloacetate transaminase (GOT), glutamate pyruvate transaminase (GPT), albumin and high-density lipoprotein (HDL) cholesterol in the serum of the Kocat-D1-2 group were significantly normalized when compared to the DM control group. However, significant differences were not observed between the Kocat-D1-1 group and the DM control group. Histochemical staining of the liver of the Kocat-D1-2 group revealed no fat accumulation. The insulin level was significantly upregulated in the Kocat-D1-2 group (0.13±0.02 ng/㎖) when compared to the DM control group (0.05±0.04 ng/㎖). The relative volume of β-cells in the pancreas of the Kocat-D1-2 group (49.4±4.2%) also increased significantly when compared to the DM control group (12.9±7.9%). These results suggest that Kocat-D1 exerts an anti-hyperglycemic effect through the enhancement of insulin secretion.

차세대 엔진용 연료레일 구조강도 최적화

오승혁(Seung-Hyuk Oh),구광원(Kwang-Won Koo),이영오(Yeong-Oh Lee) 대한기계학회 2019 대한기계학회 춘추학술대회 Vol.2019 No.11

초임계이산화탄소를 이용한 탈카페인녹차 열수추출물의 포유동물 세포주를 이용한 염색체이상시험

구윤창(Yun-chang Koo),이현순(Hyun-sun Lee),박병규(Byung-gyu Park),김은진(Eun-jin Kim),이선주(Sun-joo Lee),김경헌(Kyoung Hoen Kim),김영석(Young Suk Kim),김광옥(Kim Kwang ok),정영신(Young-shin Chung),이광원(Kwang-won Lee) 한국환경성돌연변이발암원학회 2006 한국환경성돌연변이·발암원학회지 Vol.26 No.3

There are 10~30% polyphenol and 2~4% caffeine in green tea. Caffeine is a kind of alkaloid containing nitrogen which cause stimulation, impatience, headache, insomnia, low birth weight infant. Because of these negative effect, decaffeined beverage came out and decaffeined coffee already have a big market since 1970s. Having proving the physiologic functions of green tea, high consumption of coffee is shifting to green tea. Because of the carcinogenic effect of the organic solvents, decaffeine processing with supercritical carbon dioxide has industrialized and have an advantage in environment-friendly and minimized flavor loss. Decaffeined green tea using supercritical carbon dioxide is considered to be safe but there are not enough study. We investigated the chromosome aberration test with mammalian cell line, CHL. When the cells were treated with 5000, 2000, 1000 ㎍/㎖ and compared with the negative controls, there were no significant (P > 0.05) increased chromosome aberration. Same results was observed when adding S9 mixture or not. As a result, water extract of decaffeined green tea using supercritical carbon dioxide does not induce chromosome aberration.

HPLC/DAD를 이용한 림술푸론, 에타메트설푸론메틸, 트리베누론메칠, 클로리무론에칠 4종 성분의 잔류농약 분석법 개발

구윤창(Yun-Chang Koo),양성용(Sung-Yong Yang),왕증(Zeng Wang),안은미(Eun-Mi An),허경(Kyoung Heo),김형국(Hyengkook Kim),신한승(Han-Seung Shin),이진원(Jin-Won Lee),이광원(Kwang-Won Lee) 한국식품영양과학회 2010 한국식품영양과학회지 Vol.39 No.8

Sulfonylurea계 제초제인 rimsulfuron, ethametsulfuronmethyl, tribenuron-methyl, chlorimuron-ethyl의 네 가지물질의 잔류농약 분석을 위해 HPLC를 이용한 분석방법을 개발하였다. ODS 칼럼(250 ㎜×4.6 ㎜, 5 ㎛ diameter particle size)를 사용하였으며 칼럼오븐은 35oC로 유지하고 용매 A(20 mM KH₂PO₄, pH 2.5)와 용매 B(acetonitrile)를 45:55의 비율로 1 mL/min의 유속으로 흘려주었다. 시료 주입량은 20 μL였으며 분석조건 하에서 rimsulfuron, ethametsulfuron-methyl, tribenuron-methyl, chlorimuron-ethyl의 retention time은 각각 5.92, 6.54, 9.28, 14.35분이었고 정량한계는 각각 0.02, 0.01, 0.001, 0.004 ㎎/㎏이었다. 회수율 실험은 백미, 사과, 콩에 4종의 농약 표준품을 각각 0.05, 0.1, 0.5㎎/㎏의 세 가지 농도로 spiking하여 수행하였으며 86.12∼116.26%의 회수율을 얻었고 표준오차는 모든 실험에서 10%이하였다. The method for residue analysis of four sulfonylurea pesticides, rimsulfuron, ethametsulfuron-methyl, tribenuron-methyl and chlorimuron-ethyl was examined and analyzed by HPLC with ODS column (250 ㎜×4.6 ㎜, 5 ㎛ diameter particle size) which was maintained at 35oC. Mobile phase consisted of solvent A (20 mM KH₂PO₄, pH 2.5) and solvent B (acetonitrile). Isocratic elution of the column with 45% solvent A and 55% solvent B at a flow rate of 1 mL/min resulted in retention times of 5.92, 6.54, 9.28, and 14.35 min for rimsulfuron, ethametsulfuron-methyl, tribenuron-methyl, and chlorimuron-ethyl, respectively. All injection volumes were 20 μL. The limit of quantitation was 0.02, 0.01, 0.001, and 0.004 ㎎/㎏ for rimsulfuron, ethametsulfuron-methyl, tribenuron-methyl, and chlorimuron-ethyl, respectively. Recovery rate test was performed with three farm products, rice, apple and soybean. Four sulfonylurea pesticides were spiked at concentrations of 0.05, 0.1 and 0.5 ㎎/㎏. The recovery rates were ranged from 86.12% to 116.26% and the standard deviations of all experiments were within 10%.

GDI 연료레일 피로수명 평가절차 개발

오승혁(Seung Hyuk Oh),구광원(Kwang Won Koo),강영일(Young Il Kang),김대성(Dae Sung Kim) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12

정신지체 환아의 치과치료를 위한 외래마취관리 -증례보고-

서광숙,구미숙,김현정,염광원,Seo, kwang-Suk,Koo, Mi-Suk,Kim, Hyun-Jeong,Yum, Kwang-Won 대한치과마취과학회 2005 Journal of Dental Anesthesia and Pain Medicine Vol.5 No.1

General anesthesia is often required for mentally retarded children undergoing extensive dental treatment. We experienced a case of dental treatment under general anesthesia in a 14-year-old boy with mental retardation. He was treated on an outpatient basis. He was diagnosed of Noonan syndrome and received heart surgery when he was six years old. Induction using thiopental and vecuronium was uneventful and nasotracheal intubation were carried out. General anesthesia was maintained with sevoflurane for 2.5 hours. After monitoring the patient for 2 hours and confirming his recovery, he was discharged from the day care unit. In summary, we report this successful anesthetic management of a mentally retarded child during dental treatment in as an out-patient.

HPLC를 이용한 Isoproturon, Phenmedipham, Pyridate 및 Nitenpyram 4종 성분의 잔류농약 분석법 개발

양성용(Sung-Yong Yang),구윤창(Yun-Chang Koo),Zeng Wang,허경(Kyeong Heo),김형국(Hyeongkook Kim),안은미(Eun-Mi An),신한승(Han-Seung Shin),이진원(Jin-Won Lee),이광원(Kwang-Won Lee) 한국식품영양과학회 2010 한국식품영양과학회지 Vol.39 No.8

Bis-carbamate계(phenmedipham), urea계(isoproturon), thiocarbamate계(pyridate) 및 vinyllidenediamine계(nitenlyram) 4종의 농약을 HPLC를 이용하여 분석하는 방법을 개발하였다. 사용된 칼럼은 C-18(250 ㎜×4.6 ㎜, 5 ㎛ diameter particle size)이며 isoproturon, phenmedipham은 acetonitrile과 물을 50:50으로 섞어서 사용하였으며, pyridate는 acetonitrile과 물을 85:15로, nitenpyram은 phosphoric acid를 이용하여 pH 2.5로 맞춘 50 mM KH₂PO₄와 acetonitrile을 90:10으로 섞어 유속 1 mL/min의 isocratic 조건으로 분석하였다. 시료 주입량은 10 μL이며 retention time은 isoproturon 6.12분, phenmedipham 8.63분, pyridate 9.40분, nitenpyram 12.76분, 정량한계는 모두 0.05 ㎎/㎏이었다. 회수율 실험은 쌀, 사과 및 대두에 4종의 농약 표준품을 각각 0.05, 0.1 및 0.5 ㎎/㎏이 되도록 세 가지 농도로 spiking 하였으며, 회수율 및 분석오차는 70.18~118.08% 범위와 10% 이내를 만족하였다. A method for the determination of four pesticide compounds, urea (isoproturon), bis-carbamate (phenmedipham), thiocarbamate (pyridate) and vinyllidenediamine (nitenpyram) were examined and analyzed by HPLC with C-18 column (250 ㎜×4.6 ㎜, 5 ㎛ diameter particle size). Mobile phase consisted of deionized water, acetonitrile and 50 mM KH₂PO₄ (pH 2.5). Isoproturon and phenmedipham analytical condition was isocratic elution of the column with 50% solvent A (acetonitrile) and 50% solvent B (deionized water); pyridate was 85% solvent A (acetonitrile) and 15% solvent B (deionized water) at a flow rate of 1 mL/min; and nitenpyram analytical condition was 90% solvent A (50 mM KH₂PO₄, pH 2.5) and 10% solvent B (acetonitrile) at a flow rate of 1 mL/min. In results, retention times were 6.12, 8.63, 9.40 and 12.76 min for isoproturon, phenmedipham, pyridate and nitenpyram, respectively. All injection volumes were 10 μL and the limit of quantitation was 0.05 ㎎/㎏ for four pesticide compounds, respectively. Recovery rate test was performed with three farm products, rice, apple and soybean. Four pesticide compounds were spiked at concentrations of 0.05, 0.1 and 0.5 ㎎/㎏. The recovery rates were ranged from 70.18% to 118.08% and the standard deviations of all experiments were within 10%.

가자(Terminalia chebula Retz.) 추출물의 간섬유화 억제활성

이현순(Hyun-Sun Lee),구윤창(Yun-Chang Koo),이광원(Kwang-Won Lee) 한국식품과학회 2009 한국식품과학회지 Vol.41 No.5

간성상세포(HSC)는 간섬유화와 간경변에 중요한 역할을 한다고 알려져 있다. 간손상에 의해 둥근 모양의 간성상세포는 활성화되어 세포외기질(ECM)을 생산하는 myofibroblast와 같은 모양으로 활성화 된다. 활성화된 간성상세포의 특징은 빠른 증식 속도와 collagen과 같은 세포외 기질의 생산이다. 활성화된 간성상세포의 제거방법은 apoptosis를 유도하는 것이다. 가자 추출물은 정상 간세포(rat primary hepatocyte), 간세포주(HepG2) 및 활성화된 간성상세포주인 T-HSC/Cl-6에 1,000 μg/mL의 농도까지 처리하여 세포독성을 확인하였다. 그 결과 hepatocyte나 HepG2에서는 최고 농도에서도 독성이 없었으나 T-HSC/Cl-6는 U-shape 모양으로 사멸하는 것을 확인 하였다. T-HSC/Cl-6의 사멸이 apoptosis에 의한 것인지를 Annexin-V/PI double staining을 통하여 확인한 결과 apoptosis에 의해 T-HSC/Cl-6의 사멸이 일어나는 것을 확인하였다. Activation of hepatic stellate cells (HSCs) is known to be responsible for hepatic fibrosis and cirrhosis. When round-shape quiescent HSCs go to activation by liver injury, production of extracellular matrix is increased, and its shape becomes myofibroblast-like shape. The activated HSCs are characterized by the high rate of proliferation and the increased production of extracellular matrix. One way of the regeneration of activated HSCs is an apoptosis induction followed by removing the activated myofibroblast-like cells. The effect of extract of Terminalia chebula Retz. (TCE) on cytotoxicity was evaluated using the rat primary hepatocyte, HepG2 and T-HSC/Cl-6 by incubating these cells with TCE up to the dose of 1,000 μg/mL. At the maximum dose of TCE, no cytotoxicity was found on primary hepatocyte and HepG2, but cytotoxic effect of TCE was found on activated HSCs, and T-HSC/Cl-6 in a U-shaped dose-response manner with the highest effect at 500 μg/mL of TCE. Finally, we confirmed the occurrence of apoptotic cell death by annexin-V/PI double staining. The population of annexin-V positive cells was increased in a dose dependent manner.

초임계이산화탄소를 이용한 탈카페인녹차 열수추출물의 포유동물 세포주를 이용한 염색체이상시험

구윤창,이현순,박병규,김은진,이선주,김경헌,김영석,정영신,이광원,Koo, Yun-Chang,Lee, Hyun-Sun,Park, Byung-Gyu,Kim, Eun-Jin,Lee, Sun-Joo,Kim, Kyoung-Hoen,Kim, Young-Suk,Chung, Young-Shin,Lee, Kwang-Won 한국환경성돌연변이발암원학회 2006 한국환경성돌연변이·발암원학회지 Vol.26 No.4

There are $10{\sim}30%$ polyphenol and $2{\sim}4%$ caffeine in green tea. Caffeine is a kind of alkaloid containing nitrogen which cause stimulation, impatience, headache, insomnia, low birth weight infant. Because of these negative effect, decaffeined beverage came out and decaffeined coffee already have a big market since 1970s. Having proving the physiologic functions of green tea, high consumption of coffee is shifting to green tea. Because of the carcinogenic effect of the organic solvents, decaffeine processing with supercritical carbon dioxide has industrialized and have an advantage in environment-friendly and minimized flavor loss. Decaffeined green tea using supercritical carbon dioxide is considered to be safe but there are not enough study. We investigated the chromosome aberration test with mammalian cell line, CHL. When the cells were treated with 5000, 2000, 1000 ${\mu}g/ml$ and compared with the negative controls, there were no significant(P>0.05) increased chromosome aberration. Same results was observed when adding S9 mixture or not. As a result, water extract of decaffeined green tea using supercritical carbon dioxide does not induce chromosome aberration.

GDI 연료레일 신뢰성 평가모드 개발

오승혁(Seung Hyuk Oh),강영일(Young Il Kang),구광원(Kwang Won Koo),오연지(Yeon Jee Oh),김대성(Dae Sung Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11