• Journal of Nutrition and Health
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• 제31권9호
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• pp.1394-1403
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• 1998

The study was designed to observe the effect of dietary calcium and fats on plasma cholesterol level, hepatic microsomal fluidity and HMG-CoA reductase activity as well as the excretion of fecal bile acids and neutral sterols in 1, 2-dimethylhydrazine(DMH)-treated rats. Male Sprague Dawley rats, at 7 weeks of age, were divided into 2 groups, 0.3% and 1.0% Ca levels and each group again subdivided into 2 groups of corn oil and perilla oil. Each rat was intramuscularly infused with DMH for 6 weeks to give total dose of 180mg/kg body weight and also fed experimental diet containing 15%(w/w) different fit and Ca(0.3% or 1.0%) for 20 weeks. High dietary calcium(1.0%) did not significantly influence on plasma cholesterol as well as hepatic microsomal fluidity and HMG CoA reductase activity, but significantly reduced the excretion of total bile acid per gram of faces and increased the excretion of total neutral sterol. However, high dietary Ca reduced the excretion of secondary bile acid(deoxycholic and lithocholic acids) which was known as promoter for colon cancer. Perilla oil rich in n-3 ${\alpha}$-linolenic acid significantly decreased plasma cholesterol by increasing hepatic microsomal fluidity compared with corn oil, but did not influence on HMG CoA reductase activity. Perilla oil did not influence on fecal excretion of total and primary bile acids, but reduced the excretion of secondary bile acids. Therefore, it could be recommended to consume more fish product and food rich in calcium and use more perilla oil in meal preparation to prevent from coronary hear disease and colon cancer especially when high fit diet has been practiced. (Korean Nutrition 31(9) : 1394-1403, 1998)

• Preventive Nutrition and Food Science
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• 제6권1호
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• pp.66-72
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• 2001

Ginseng may have antioxidant and pharmacologic effects similar to those of vitamin E. The interactive effect of ginseng and vitamin E was studied with respect to cholesterol metabolism and the antioxidant status. A ginseng supplement (0.1%, wt/wt) with comparable levels of vitamin E was provided with a high-cholesterol (1%, wt/wt) diet to rats for 5 weeks. The amount of vitamin E included in the ginseng-free and ginseng diets was either a low (low-E) or a normal (normal-E) level. The ginseng supplements significantly (p<0.05) altered the concentrations of plasma triglycerides in both the low-vitamin E group and normal-vitamin E group compared to the each ginseng-free group. The hepatic triglyceride and cholesterol content were not significantly (p>0.05) different between groups regardless of the vitamin E level in the diet. The hepatic HMG-CoA reductase activity was significantly (p<0.05) lowered by the ginseng supplement in both the low-vitamin E and the normal-vitamin E groups compared to the ginseng-free group. The HMG-CoA reductase activity was also significantly (p<0.05) lowered with in increase of the dietary vitamin E in the ginseng-free group. The excretion of fecal neutral sterol was significantly (p<0.05) lower in the normal-E ginseng group than th low-E ginseng-free group. Neither dietary ginseng nor vitamin E significantly changed the hepatic antioxidant enzymes activity. This data indicates that ginseng supplements lower the concentration of plasma triglyceride and hepatic HMG-CoA reductase activity regardless of eh dietary vitamin E level. This information may contribute to understanding the interactive effect of ginseng and vitamin E on cholesterol biosynthesis in high cholesterol-fed rats.

• Clinical and Experimental Reproductive Medicine
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• 제13권2호
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• pp.101-112
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• 1986

It is now common practice to attempt ovarian hyperstimulation in vitro fertilization and embryo transfer (IVF-ET) to promote the development of multiple preovulatory follicles and to maximize the number of mature egg available. There are several drugs for hyperstimulation such as clomiphene citrate only, clomiphene citrate and human menopausal gonadotropin (HMG) and HMG only. Accumlated experience has shown that the hyperstimulation of the ovary in IVF-ET results in high pregnancy rate. But the hyperstimulation of the ovary in IVF-ET may cause the hyperandrogenism, so we must consider the adverse effect on pregnancy rate of the hyperandrogenism. Little is known about the functional significance of androgen for the follicular growth, however, the hyperandrogenism might interfere with oocyte maturation. The aim of the present investigation was to determine the serum profiles of estradiol, androstenedione and testosterone during the hyperstimulated menstrual cycles in IVF. The results were summarized as follows: 1. There was a gradual increase in the mean levels of serum estradiol, androstenedione, and testosterone approaching follicular maturation. 2. The mean serum estradiol levels in the hyperstimulated groups were significantly higher than that in the control group in late follicular phase and ovum retrieval (ovulation) day (p<0.01). 3. The mean serum androstenedione levels in the clomiphene citrate groups were significantly higher than that in the control group in late follicular phase (p<0.01). There was no statistically significant different in the mean serum androstenedione levels between the control group and the HMG group (p>0.05). 4. There was no statistically significant difference in the mean levels of testosterone among each group (p>0.05). 5. There was no statistically significant different in the mean levels of estradiol, androstenedione and testosterone between the fertilized patients and non-fertilized patients in clomiphene citrate and HMG group (p>0.05).

• Natural Product Sciences
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• 제14권4호
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• pp.215-220
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• 2008

Hypolipidemic effect of Insamsansa-eum (ISE, Ren-Shen-Shan-Zah-Yin in Chinese) consisted of Red ginseng (RG; the steamed root of Panax ginseng C.A. Meyer) and Crataegii fructus (CF, the fruit of Crataegus pinnatifida BGE) is used frequently in China and Korea as a herbal medicine to treat arteriosclerosis, was investigated. Treatment of ISE significantly reduced blood triglyceride (TG) and total cholesterol (TC) levels in Triton WR-1339-induced hyperlipidemic mice and serum TG levels in corn oil-induced hypertriglyceridemic mice. ISE significantly lowered the high blood TG and TC levels as well as body and epididymal mass weights in hyperlipidemic mice induced by long-term feeding of a high-fat diet and increased blood HDL cholesterol level. ISE and its ingredients, RG and CF, inhibited pancreatic lipase and HMG-CoA reductase activities. Of its ingredients, RG reduced the blood TC level and HMG-CoA reductase activity more than CF. CF reduced blood TG level and pancreatic lipase activity more than RG. These finding suggest that the antihyperlipidemic effect of ISE may be due to synergistic inhibition of HMG-CoA reductase and pancreatic lipase by RG and CF, and that ISE may be effective hypolipidemic agents.

• 한국식품영양과학회지
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• 제31권5호
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• pp.826-833
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• 2002

본 연구는 YK-209뽕잎이 STZ유발 당뇨 간조직 중의 콜레스테롤대사에 미치는 영향을 규명하기 위해 수행되었다. 실험동물은 100$\pm$10 우의 Sprague-Dawley종 수컷을 정상군(nor-mal group)과 당뇨군으로 나누고 당뇨군은 다시 식이내 YK-209뽕잎 함량에 따라 각각 YK-209뽕잎을 공급하지 않은 당뇨군(DM group), 0.1% YK-209 뽕잎 식이군(DM-0.1Y group),0.2% YK-209 뽕잎 식이군(DM-0.2Y group) 및 0.4% YK-209 뽕잎 식이군(DM-0.4Y group)으로 나누어 자유섭식 시켰다. 3주 후 STZ으로 당뇨를 유발한 후 9일째에 희생하여 혈액 및 간장에서의 콜레스테롤대사 개선능에 대해 관찰하였다 YK-209 뽕잎중의 flavonoid 함량을 조사한 결과 rutin은 4.19 mg/g, iso-quercitrin은 2.01 mg/g, kaempferol-3-O-ru-tinose은 1.64 mg/B, 및 astragalin은 0.36 mg/g이었으며 총 flavonoid 함량은 8.19 mg/g 으로 청일 뽕잎보다 그 함량들이 높았다. 혈청중의 중성지방 함량은 정상군에 비해 DM군이 105% 높았으나 YK-209 뽕잎 공급군은 정상군 수준이었다. 총 콜레스테롤 함량과 LDL-cholesterol함량은 정 상군에 비해 DM군은 증가되었으며, YK-209뽕잎 공급군은 DM군에 비해 유의적으로 감소되었다. 반면 HDL-cholesterol 함량은 정상 군에 비해 DM군에서 감소되었으나 YK-209뽕잎 공급군은 정상군 수준이었다 동맥경화 지수(AI)는 DM군은 정상군에 비해 약 3배 정도 높았으나 UM-0.1Y군과 DM-0.2Y군은 정상군 수준이었다. 간조직 중의 총지질 함량과 중성지방함량은 정상군에 비해 DM군에서 감소되었으며 YK-209 뽕잎을 공급한 군에서 DM군에 비해 증가되었다. 간조직의 콜레스테롤 함량은 DM군에서 정상군에 비해 160%증가되었으나YK-209 뽕잎 공급군은 정상군 수준이었다. 간조직 중의 HMG-CoA reductase 활성은 정 상군에 비 해 DM군이 43% 감소되었으나 DM-0.1Y군과 DM-0.2Y군은 정상군 수준이었다. 결론적으로 YK-209 뽕잎은 STZ유발 당뇨쥐의 간조직의 HMG-CoA reductase활성의 조절 및 혈액과 간조직의 콜레스테롤 농도를 감소시키는 효과가 있음이 규명되었다.

• Journal of Nutrition and Health
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• 제32권6호
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• pp.637-643
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• 1999

The effects of yam(Dioscorea) on lowering cholesterol level and its mechanism were investigated. The concentrations of plasma and liver lipids, and the excretions of fecal neutral sterol and bile acid were measured in male Sprague-Dawley rats. Five Groups of 8 rats were fed hypercholesterolemic diet(1% cholesterol, 10% lard ; control), hypercholesterolemic diet plus 15% or 30% dried yam powder prepared by either hot-air(15HY, 30HY) or freeze dry(15FY, 30FY) for 4wk. Plasma total lipid, total cholesterol and cholesterol level was also significantly lower(28%, p<0.05), buy HMG-CoA reductase activity was higher in 30FY(230%, p<0.05) than in control. Although no significant differences in fecal neutral sterols were observed among groups, the yam-fed rats apparently had less bacterial degradation of cholesterol as indicated by a significantly greater of fecal cholesterol to coprostanol than in controls. Total fecal bile acids were significantly greater in rats fed yam(15HY : 5 folds, 15FY ; 12,30HY ; 12, 20FY ; 22) than in controls. The ratio of secondary to primary bile acids was almost 8 times lower in 30FY than in control. These data indicate that yam lowers cholesterol both in plasma and in liver through increasing fecal bile acid excretion as well as HMG-CoA reductase activity. Freeze-dried yam, which possesses viscosity, was more effective in cholesterol-lowering action than hot-air dried one.

• 한국환경성돌연변이발암원학회지
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• 제26권2호
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• pp.35-40
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• 2006

Background: Inorganic arsenic is a human carcinogen that can target the liver, but its carcinogenic mechanisms are still unknown. Inorganic arsenic induces a spectrum of tumors including hepatocellular carcinoma in mice. Methods: Pregnant C3H mice were supplied with drinking water containing 50 ppm sodium arsenite during their pregnancy. The protein expression profile in the liver of 0.5-day-old. male offsprings exposed transplacentally to sodium arsenite was analyzed using protein 2D gel electrophoresis followed by mass spectrometry (MALDI-TOF). Results: Expression of proteins such as hydroxymethylglutaryl-CoA synthase mitochondrial precursor (HMG-CoA synthase), ${\beta}$-actin (cytoplasmic 1) and apolipoprotein A-IV precursor (Apo-AIV) were induced in mouse liver by sodium arsenite, while uricase (urate oxidase), guanine nucleotidebinding protein beta subunit 2-like 1 (RACK1) and fructose-bisphosphate aldolase B (Aldolase 2) were down-regulated. Summary: Expression of proteins that have been implicated in carcinogenesis, such as HMG-CoA, ${\beta}$-actin, and RACK1, was regulated in the liver of mice transplacentally exposed to inorganic arsenic.

• 생약학회지
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• 제31권2호
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• pp.190-195
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• 2000

In the previous reports, we selected 80% MeOH extract of 7 herbs including Scutellariae Radix(SR), Paeoniae Radix Rubra(PRR), Moutan Cortex(MC), Angelicae Gigantis Radix(AGR), Crataegi Fructus(CF), Bambusae Caulis in Taeniam(BCT) and Cinnamomi Ramulus(CR), which exhibited the inhibitory effect on HMG-CoA reductase and DPPH free radical scavenging effect in vitro, and antihyperlipidemic effects on antihyperlipidemic rats induced by Triton WR 1339 in vivo. Among them, SR, MC, AGR and BCT showed significant suppression of elevated serum LDL-cholesterol level, and AGR and CF showed significant liver weight increase on high cholesterol diet induced hyperlipidemic mice. And, SR, PRR, AGR, BCT and CR significantly suppressed the elevated serum total cholesterol and triglyceride levels on corn oil induced hyperlipidemic rats. Then, in order to research new antihyperlipidemic agents from the oriental medicinal herbs, we chose SR, AGR, CR and BCT which have the antihyperlipidemic effect in vitro and in vivo, and those herbs were systematically fractionated with organic solvent. EtOAc fraction of SR, hexane fraction of BCT, AGR and chloroform fraction of CR exhibited remarkably inhibitory effect on HMG-CoA reductase activity.

• 한국식품영양과학회지
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• 제25권3호
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• pp.392-398
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• 1996

This study was carried out to determine the effects of sodium alginate and cellulose on the cholesterol metabolism in cholesterol-fed rats. Thirty male Sprague-Dawley rats were randomly assigned to three dietary treatments. Rats were fed, ad libitum, diets containing 10% dietary fibers as sodium alginate, cellulose or fiber-free with 1% cholesterol for 4 weeks. The results obtained were as follows: the feeding of sodium alginate with 1% cholesterol induced a significant decrease in plasma cholesterol and TG. The feeding of sodium alginate significantly decreased hepatic total lipids and TG levels, whereas the feeding of sodium alginate significantly increased hepatic HMG-CoA reductase activity. The feeding of sodium alginate and cellulose significantly increased fecal cholesterol and bile acid excretion. The excretion of TG in sodium alginate group, however, was two-fold and four-fold increased compared to cellulose and fiber-free group, respectively. As a result of this study, the ingestion of sodium alginate decreased plasma cholesterol and TG concentrations and liver TG concentration. This may be explained by the facts that fecal cholesterol, bile acid and TG level were increased significantly in sodium alginate group. The increased hepatic HMG-CoA reductase activity by sodium alginate feeding appears to be corresponded to whole-body cholesterol homeostasis.

• 한국가금학회:학술대회논문집
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• 한국가금학회 2003년도 제20차 정기총회 및 학술발표회
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• pp.75-76
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• 2003

육계사료내 마늘분말의 첨가 급여가 육계의 성장과 콜레스테롤 대사에 미치는 영향을 규명하기 위해 본 연구를 실시하였다. 1일령 육계에게 마늘분말을 첨가하지 않은 대조사료(항생제 첨가구 또는 무첨가구), 마늘분말을 1 ％, 3 ％ 및 5 ％ 수준으로 첨가한 실험사료를 6주간 급여하였다. 증체량은 항생제 무첨가 대조구에 비해 마늘분말 3 ％ 및 5 ％ 첨가구에서 유의하게 증가하였다. 모든 마늘분말 첨가구에서 조직내 콜레스테롤 함량은 다소 감소하는 경향을 나타내었으며, 간내 HMG-CoA reductase mRNA의 발현이 저하되는 결과가 관찰되었다. IB 항체 생성량은 항생제 무첨가 대조구에 비해 모든 마늘분말 첨가구에서 유의하게 증가하는 결과가 관찰되었다.