• Title/Summary/Keyword: ACAT 억제활성

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Development of Biologically Active Compound from Edible Plant Sources -V. -Phytol, ACAT (Acyl-CoA: Cholesterol Acyltransferase) Inhibitory Diterpenoid From the Leaves of Lactuca sativa L.- (식용 식물자원으로부터 활성물질의 탐색-V. -상추(Lactuca sativa L.)의 ACAT 억제 Diterpenoid, Phytol-)

  • Jang, Tae-O;Bang, Myun-Ho;Song, Myoung-Chong;Hong, Yoon-Hee;Kim, Ji-Young;Chung, Dae-Kyun;Pai, Tong-Kun;Kwon, Byung-Mok;Kim, Young-Kuk;Lee, Hyun-Sun;Kim, In-Ho;Baek, Nam-Ln
    • Applied Biological Chemistry
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    • v.46 no.1
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    • pp.66-68
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    • 2003

Development of Biologically Active Compounds from Edible Plant Sources XXII. Isolation of Indoles from the Roots of Brassica campestris ssp rapa and their hACAT Inhibitory Activity (식용식물자원으로부터 활성물질의 탐색 XXII. 순무(Brassica campestris ssp rapa) 뿌리로부터 인돌 화합물의 분리 및 hACAT 저해 활성)

  • Bang, Myun-Ho;Lee, Dae-Young;Oh, Young-Jun;Han, Min-Woo;Yang, Hye-Joung;Chung, Hae-Gon;Jeong, Tae-Sook;Lee, Kyung-Tae;Choi, Myung-Sook;Baek, Nam-In
    • Applied Biological Chemistry
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    • v.51 no.1
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    • pp.65-69
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    • 2008
  • The roots of Brassica campestris ssp rapa were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned with EtOAc, n-BuOH and $H_2O$. From the EtOAc fraction, three compounds were isolated through the repeated silica gel and octadecyl silica gel (ODS) column chromatography. From the results of spectroscopic data including NMR and MS, the chemical structures of the compounds were determined as caulilexin C (1), indoleacetonitrile (2) and arvelexin (3). The arvelexin (3) has been isolated from this plant for the first time. Compounds 1, 2 and 3 showed inhibitory activity on human Acyl CoA: cholesterol. transferase 1 (hACAT1) by $54.6{\pm}6.0%$, $69.2{\pm}4.7%$ and $68.6{\pm}3.7%$, and on human Acyl CoA: cholesterol transferase 2(hACAT2) by $4.8{\pm}13.4%$, $45.6{\pm}4.8%$ and $39.5{\pm}4.3%$, respectively, at 100 ${\mu}g/ml$.

Production of Phytol, an ACAT Inhibitor, from Callus Culture of Lettuce (Lactuca sativa L.) (상추 (Lactuca sativa L.) callus로부터 ACAT 억제 활성물질, phytol의 생산)

  • An, Kwang-Hee;Jang, Tae-O;Baek, Nam-In;Kim, Se-Young
    • Journal of Plant Biotechnology
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    • v.29 no.1
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    • pp.63-68
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    • 2002
  • The possibility for mass production of phytol, inhibitory diterpene against ACAT (Acyl-CoA: Cholesterol acyltransferase) was investigated by using callus culture of lettuce. The callus were induced from lettuce cotyledon explants on MS medium containing 0.5 mg.L$^{-1}$ NAA after 4 week's culture. Adventitious roots were formed from the explants on MS medium containing 0.5 mg.L$^{-1}$ IBA or 1.0 mg.L$^{-1}$ NAA. Adventitious shoots and roots were emerged from the callus when the callus was transferred to MS medium containing auxin alone, or with cytokinin. The plant growth regulators and their concentrations for the organogenesis were 1.0 mg.L$^{-1}$ NAA, 0.1 mg.L$^{-1}$ BA, 0.5 mg.L$^{-1}$ NAA with 0.1 mg.L$^{-1}$ kinetin, or 0.5 g.L$^{-1}$ 2.4-D with 1.0 mg.L$^{-1}$ kinetin. Analyses of chlorophyll contents showed that chlorophyll contents were higher in morphogenic calli than in non-morphogenic calli. However, the chemical analyses of gas chromatography indicated that phytol contents were not proportionate to the chlorophyll contents of callus. The content of phytol was higher in callus than in lettuce cotyledon.ledon.

Attenuation of Atherosclerosis by 3,4-Dihydroxy-Hydrocinnamic Acid in Rabbits by Partial Inhibition of ACAT (토끼에서 ACAT 억제에 의한 3,4-다이하이드록시 하이드로시나믹산의 동맥경화 완화 효과)

  • Lee, Mi-Ran;Choi, Jae-Hoon;Yang, Young;Oh, Ki Sook;Jeong, Tae-Sook;Lee, Chul-Ho;Oh, Goo Taeg
    • Korean Journal of Clinical Laboratory Science
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    • v.48 no.4
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    • pp.280-286
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    • 2016
  • Polyphenols have been reported to have beneficial effects on cardiovascular disease. A polyphenolic compound, 3,4-dihydroxy-hydrocinnamic acid (3,4-DHHCA), has been shown to have antioxidative and antitumorigenic activities. However, the effect of 3,4-DHHCA on atherosclerosis is still unknown. Herein, we investigated the effects of 3,4-DHHCA on atherosclerosis in New Zealand White rabbits. Broad and fused fatty streak lesions were found in rabbits fed with high-cholesterol diet for 8 weeks. Administration of 3,4-DHHCA reduced atherosclerotic lesion formation and lesional accumulation of macrophage in rabbits fed with cholesterol diet without systemic or local toxicity. Hepatic acyl-coenzyme A: cholesterol acyltransferase (ACAT) activity was decreased after treatment with 3,4-DHHCA by 22% in cholesterol diet-fed rabbits compared with the control group. These results indicate that 3,4-DHHCA had antiatherogenic effects in rabbits, possibly by partial inhibition of ACAT.

Screening of Biologically Active Compound from Edible Plant Sources-IX. Isolation and Identification of Sesquiterpene Lactons Isolated from the Root of Ixeris dentata forma albiflora; Inhibition Effects on ACAT, DGAT and FPTase Activity (식용식물자원으로부터 활성물질의 탐색-IX. 흰씀바귀(Ixeris dentata forma albiflora)뿌리에서 Sesquiterpene Lactone 화합물의 분리 및 구조 동정; ACAT, DGAT 및 FPTase 효소 활성의 저해)

  • Bang, Myun-Ho;Jang, Tae-O;Song, Myoung-Chong;Kim, Dong-Hyun;Kwon, Byoung-Mog;Kim, Young-Kuk;Lee, Hyun-Sun;Chung, In-Sik;Kim, Dae-Keun;Kim, Sung-Hoon;Park, Mi-Hyun;Baek, Nam-In
    • Applied Biological Chemistry
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    • v.47 no.2
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    • pp.251-257
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    • 2004
  • The root of lxeris dentata forma albiflora was extracted with 80% aqueous MeOH and solvent fractionated with EtOAc, n-BuOH and water, successively. From the EtOAc and n-BuOH fractions, four sesquiterpene compounds were isolated through the repeated silica gel and ODS column chromatographies. The chemical structures were determined as zaluzanin C (1), $9{\alpha}-hydroxyguaian-4(l5),10(14),11(13)-triene-6,12-olide$ (2), $3{\beta}-O-{\beta}-D-glucopyranosyl-8{\alpha}-hydroxyguaian-4(15),10(14 )-diene-6,12-olide$ (3), and $3{\beta}-O-{\beta}- D-glucopyranosyl-8{\beta}hydroxyguaian-10(14)-ene-6,12-olide$ (4) through the interpretation of several spectral data including 2D-NMR. Some showed the inhibitory effects on DGAT (Diacylglycerol acyltransferase), ($IC_{50}$ values of 1, 2: 0.13, 0.10 mM), the catalyzing enzymes of the intracellular esterification of diacylglycerol and FPTase (Famesyl-protein transferase), ($IC_{50}$ values of 1, 2: 0.15, 0.18 mM), the farnesylation enzyme for Ras protein charge of cancer promotion.

Effect of Dandelion Leaf Extracts on Lipid Metabolism in Rats Fed High Cholesterol Diet (민들레잎추출물의 흰쥐 체내 지질대사 개선 효과)

  • 조수열;박지윤;오연진;장주연;박은미;김명주;김광수
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.29 no.4
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    • pp.676-682
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    • 2000
  • The effect of dandelion leaf extracts on lipid metabolism was investigated in high cholesterol-fed rats. Four groups of rats were given a high cholesterol diet containing 10g cholesterol/kg and 2.5 g sodium cholate/kg for 6 weeks. The control group received without dandelion leaf extracts and the other three groups received with one of dandelion leaf extracts (water, ethyl acetate, ether), respectively. Weight gain and feed intake were significantly higher in water group than control group. Serum triglyceride, total cholesterol, cholesteryl ester, chylomicron and VLDL-cholesterol concentratins were lower, whereas HDL-cholesterol and phospholipid concentrations were significantly higher in dandelion leaf extract supplemented-groups than control group. Dandelion extract increased HDL-C/total-C ratio and lowered atherogenic index. Hepatic triglyceride, total cholesterol, free cholesterol and cholesteryl ester concentrations lowered in dandelion leaf extract groups compared to control group. Especially, hepatic triglyceride and free cholesterol levels were lower in ethyl acetate extract group than in water and ether extract groups. Dandelion leaf extract supplements did not affect hepatic phospholipid cencentration. Hepatic HMG-CoA reductase activity was significantly lower in water extract group than the others. ACAT activity was significantly decreased by dandelion extract supplements.

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Biofunctional Activities of Citrus Flavonoids (감귤류 플라보노이드의 생리기능 활성)

  • Cha, Jae-Young;Cho, Young-Su
    • Applied Biological Chemistry
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    • v.44 no.2
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    • pp.122-128
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    • 2001
  • This review showed a discussion on the biofunctional activities of citrus flavonoids. The major flavonoids of citrus species, hesperidin, hesperetin, naringin, and naringenin, were selected to evaluate their biological effects on the lipid metabolism in rats and hamsters, the proliferation of human hepatocyte HepG2 cells, and the antioxidative effect in lipid peroxidation models. These flavonoids showed hypotriglyceridemic effect in hamsters and hypochloesterolemic effect in rats. They also significantly inhibited the activities of phosphatidate phophohydrolase and acyl-CoA: cholesterol acyltransferase, which are key enzymes for biosynthesis of triglyceride and cholesterol, repectively, in vivo and in vitro experiments. These biofunctional activities by citrus flavonoids were shown more potent in the aglycone flavonoids, hespreretin and naringenin, than their corresponding glycoside flavonoids, hesperidin and naringin. These aglycone flavonoids also have inhibitory effects on proliferation of human hepatocyte cancer HepG2 cells. Hesperidin showed lowering activities of cellular triglyceride and cholesterol concentrations in HepG2 cells. Citrus flavonoids have significant importance in functional food industry as biofunctional active ingredients.

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Effects of Extracts of Persimmon Leaf, Buckwheat Leaf, and Chinese Matrimony Vine Leaf on Body Fat and Lipid Metabolism in Rats (감잎, 메밀잎 및 구기자잎 추출물의 식이보충이 흰쥐의 체지방 감량과 지질대사 조절에 미치는 효과)

  • Jung, Un-Ju;Lee, Jeong-Sun;Bok, Song-Hae;Choi, Myung-Sook
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.40 no.9
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    • pp.1215-1226
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    • 2011
  • The objective of this study was to investigate the anti-obesity and lipid-lowering effects of extracts of persimmon leaf (PWE), buckwheat leaf (BWE), and chinese matrimony vine leaf (LWE) in rats fed a high-fat diet (HFD). Male Sprague-Dawley rats (n=40) were divided into four groups: HFD (35% fat, w/w), HFD (38.5% fat, w/w) supplemented with PWE (10%, w/w), BWE (10%, w/w), and LWE (10%, w/w) groups. The epididymal, perirenal, and interscapular white adipose tissue (WAT) weights as well as plasma leptin level were lowest in the LWE group. Supplementation with PWE and BWE also tended to lower the perirenal and retroperitonal WAT weights compared to the HFD control group, and there was a significant decrease in plasma leptin concentration. Furthermore, plasma triglyceride concentration, hepatic cholesterol content, and hepatic lipid droplet accumulation were significantly lower in the PWE, BWE, and LWE groups than in the HFD group. BWE supplementation markedly lowered plasma total cholesterol concentration, although there were no significant differences in plasma HDL-cholesterol concentration and ratio of HDL-cholesterol/total cholesterol among the groups. Hepatic HMG-CoA reductase activity was significantly higher in the PWE and LWE groups than in the HFD group, and hepatic ACAT was not changed by extract supplementation. However, supplementation with PWE, BWE, and LWE significantly increased fecal acidic sterol content in rats fed a HFD. These results suggest that supplementation with PWE, BWE, and LWE may be an effective anti-obesity strategy by lowering body fat weight and improving plasma and hepatic lipid profiles in HFD-fed rats.

Effect of Young Phragmites communis Leaves Powder on Lipid Metabolism and Erythrocyte Antioxidant Enzyme Activities in High-Fat Diet Fed Mice (갈대순분말이 고지방을 급여한 마우스의 지질대사 및 적혈구 항산화방어계에 미치는 영향)

  • Lee, Jin;Jeong, Joo-Yong;Cho, Young-Sook;Park, Seok-Kyu;Kim, Kwang-Jin;Kim, Myung-Joo;Lee, Mi-Kyung
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.39 no.5
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    • pp.677-683
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    • 2010
  • This study investigated the effect of young Phragmites communis (Pc) leaves on lipid profiles, lipid metabolism and erythrocyte antioxidant defense system in high-fat diet fed mice. Three groups of mice were fed different diets for 8 weeks: normal diet (Normal), high-fat diet (High-fat; 37% calories from fat) and high-fat diet supplemented with 1% Pc (wt/wt, HF-Pc). Body weight, daily food intake and energy intake tended to decrease by Pc supplement in high-fat fed mice. Pc supplementation significantly lowered plasma triglyceride and total cholesterol concentrations compared to the high-fat control group. Pc also lowered hepatic and heart cholesterol contents, whereas it significantly increased fecal excretion of triglyceride and cholesterol compared to the high-fat control group. Pc significantly inhibited fatty acid synthase, 3-hydroxy-3-methylglutaryl CoA reductase and acyl-CoA:cholesterol acyltransferase activities compared to the high-fat control group. Erythrocyte superoxide dismutase and catalase activities were also significantly higher in the high-fat group than in the normal group, however Pc supplementation reversed these changes. The Pc supplementation significantly lowered erythrocyte lipid peroxidation level compared to the high-fat control group. Accordingly, these results suggest that Pc improves lipid metabolism and erythrocyte antioxidant defense system in high-fat diet fed mice.

Effect of Young Barley Leaf on Lipid Contents and Hepatic Lipid-Regulating Enzyme Activities in Mice Fed High-Fat Diet (보리순이 고지방을 급여한 마우스의 지질 함량과 간조직의 지질대사 관련 효소활성에 미치는 영향)

  • Yang, Eun-Ju;Cho, Young-Sook;Choi, Myung-Sook;Woo, Myoung-Nam;Kim, Myung-Joo;Shon, Mi-Yae;Lee, Mi-Kyung
    • Journal of Nutrition and Health
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    • v.42 no.1
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    • pp.14-22
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    • 2009
  • This study was conducted to investigate the effects of powdered young barley leaf and its water extract on body weight and lipid metabolism in high-fat fed mice. Male mice were divided into normal group, high-fat (HF) group, high-fat group supplemented with powdered young barley leaf (HF-YBL) and high-fat group supplemented with water extract of the powdered young barley leaf (HF-WYBL). The powdered young barley leaf or its water extract was added to a standard diet based on 1% dried young barley leaf (1 g YBL/100 diet and 0.28 g WYBL/100 g diet) for 8 weeks. Supplementation of YBL and WYBL significantly reduced body weight and epididymal adipose tissue weight in high-fat fed mice. Food intake and daily energy intake were significantly lower in the YBL group than in the HF group. After 8 weeks, plasma triglyceride and cholesterol concentrations were significantly higher in the HF group than in the Normal group; however, both YBL and WYBL significantly lowered those of the high-fat fed mice. The ratio of HDL-cholesterol/total cholesterol of the YBL and WYBL groups were significantly elevated compared to that of HF group. Both YBL and WYBL significantly increased fecal excretion of triglyceride in high-fat fed mice, whereas they did not affect fecal cholesterol concentration. The triglyceride levels of liver, adipose tissue and heart were significantly lower in the YBL and WYBL groups than in the HF group. Supplementation of WYBL also lowered the kidney triglyceride and heart cholesterol concentrations compared to those of HF group. Hepatic lipid regulating enzyme activities, fatty acid synthase, HMG-CoA reductase and acyl-coenzyme A: cholesterol acyltransferase, were significantly lower in the YBL and WYBL groups than in the HF group. Accordingly, these results suggest that YBL and WYBL improve plasma and organ lipid levels partly by increasing fecal lipid excretion and inhibiting fatty acid and cholesterol biosynthesis in the liver.