Journal of the Korean Society of Food Science and Nutrition
/
v.31
no.2
/
pp.277-283
/
2002
In the present study, adverse effects of megadose of dietary perilla oil were investigated in an experimental model consisted of 6 groups of Wistar rats. To compare the adverse effects of megadose perilla oil with different kind of dietary fat, rats were fed one of the following diets for one month: 10% beef tallow (B$_1$B), 10% corn oil (C$_1$B), 10% perilla oil (P$_1$B), 20% beef tallow (B$_2$B), 20% corn oil (C$_2$B), and 20% perilla oil (P$_2$B) diet. The body weight gain rate seemed to be more affected by the size of fat contents than the species of fat in the diet, so the body weight gain rate of 20% fat groups were significantly higher than those of 10% fat groups in spite of the larger amount of flood intake in 10% fat groups than in 20% fat groups. The levers of plasma triglyceride and total-cholesterol in 20% fat groups were significantly increased in dose dependent fashion when compared to 10% groups, the values of beef tallow (B$_2$B) group being the highest among all groups. Plasma glutainic pyruvic transferase activities and level of blood urea nitrogen had a tendency to increase along with increase of fat contents (%) in diets, the values of P$_2$B group, the highest among all groups, being beyond the normal levers. The plasma carbon dioxide concentration of P$_2$B group was the highest in all groups and exceeded the normal value, there being no significant difference among the plasma carbon dioxide concentration of others groups. The results showed that large dose and long term intake of dietary perilla oil had some adverse effects on hepatic and other organic functions in rats.
An, Mi-Jung;Suh, Jung-Soon;Lee, In-Ja;Cho, Sung-Hee
Journal of the Korean Society of Food Science and Nutrition
/
v.14
no.2
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pp.145-150
/
1985
This study was conducted to examine the pharmacological effect of water soluble extract of Lichens (Parmelia, Physcia and Cladonia species) on liver-damaged rat by $CCl_4$ injection. Rat livers were damaged acutely and chronically by one-time injection of $CCl_4$ just prior to five days of experimental period and continuous injections in every three days for eight weeks of experimental period, respectively. During each period the experimental group was fed Lichens extract(5.5 mg of dry wt/ml) instead of water given to the control group. For both acute and chronic liver damage, the experimental group showed higher oxidative activity of hepatic mitochondria measured by state 3 respiration, P/O ratio, respiratory control and ATP synthesized, compard to the control group. Serum glucose was slightly higher in the experimental group but liver glycogen showed no significant difference between experimental and control groups. In experimental group, liver glucose-6-phosphatase activity was increased during first two days after acute liver damage, but not significantly different from control group during chronic damage. Liver lactate, malate plus fumarte and glutamate tended to be higher in the experimental group, especially for chronic liver damaged rat. It is concluded that Lichens extract stimulate cytoplasmic and mitochondrial oxidative activities and the possible mechanism of the latter is supposed to involve the preservation of membrane integrity by certain component(s) of water-soluble Lichens extract.
Kim, Youn-Hee;Lee, Ji-Hye;Koo, Bo-Kyung;Lee, Hye-Sung
Journal of the Korean Society of Food Science and Nutrition
/
v.36
no.10
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pp.1248-1256
/
2007
The present study examined the physiological effects of isoflavone-rich bean sprout on the lipid metabolism of hyperlipidemic rats. Experimental hyperlipidemia was induced by the AIN standard diet with 0.5% cholesterol,9.3% lard and 0.2% sodium cholate in SD rats. Experimental groups consisted of normal control, hyperlipidemic control, 1% or 5% bean sprout powder-supplemented groups, and 0.2% soybean isoflauone extract-supplemented group. Four weeks feeding of isoflavone-rich bean sprout powder or isoflavone extract resulted in a significant lowering of plasma cholesterol and lowering tendency of triglyceride levels. The levels of lipid peroxidation products in the kidney and heart tissues were also lowered by the supplementation of bean sprout powder or isoflavone extract. The activities of hepatic glutathione peroxidase and catalase were increased by the supplementation of bean sprout powder or soybean isoflavone extract. Plasma concentration of vitamin A was significantly raised in the group fed 0.5% bean sprout powder. The results of the study showed that the beneficial effects of isoflavone-rich bean sprout on lipid metabolism of hyperlipidemic animals were comparable with those of soybean isoflavone extract. The positive effect of bean sprout in improving lipid metabolism might be due to the combined action of isoflavone and dietary fiber.
Journal of the Korean Society of Food Science and Nutrition
/
v.38
no.2
/
pp.154-159
/
2009
The hepatoprotective effect of ethanol extract from Hovenia dulcis fruit (HD) against ethanol-induced oxidative damage was investigated. Ethanol-induced reactive oxygen species (ROS) generation and liver damage on HepG2/2E1 cells were protected by $100{\mu}g/mL$ ethanolic extract from HD. Male C57BL/6 mice were divided into 3 groups; control (NC), ethanol (ET), ethanol plus 1 g/kg body weight ethanolic extract of HD (ET-HD). The activities of serum alanine amintransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphatase (ALP) were significantly increased in ethanol-treated group. However, ET-HD group showed protective effect by lowering serum activities. The ET group markedly decreased the activities of catalase (CAT), superoxide dismutase (SOD), and glutathione-s-transferase (GST) with the reduced level of glutathione (GSH) in liver. On the other hand, ET-HD group increased the activities of SOD and GST, and the level of GSH. Lipid peroxidation level, which was increased after ethanol administration, was significantly reduced in ET-HD group. Based upon these results, it could be assumed that ethanolic extract of HD protected the liver against ethanol-induced oxidative damage by possibly inhibiting the suppression of antioxidant activity and reducing the rate of lipid peroxidation in vitro and in vivo. Therefore, extract of Hovenia dulcis fruit might be used as a protective agent for ethanol-induced hepatic damages.
Compound K (CK) is a final metabolite of panaxadiol ginsenosides. Although panax ginseng is known to have anti-diabetic activity, the active ingredient is not yet fully identified. Therefore, it would be interesting to know whether and how CK has an anti-diabetic activity. First, insulin secretion-stimulating activity of CK was examined using RIN-m5F cell line and primary cultured islets. CK enhanced the insulin secretion in a concentration dependent manner. This effect, however, was almost completely abolished in the presence of diazoxide, $K^+$ channel opener, indicating that the insulin secretion-stimulating activity of CK is presumably due to blockade of ATP sensitive $K^+$ channel. In addition, effects of CK on gene expressions of hepatic enzymes (phosphoenolpyruvate carboxykinase[PEPCK], glucose-6-phos-phatase[G6Pase]) and on adipocyte differentiation in H4IIE and 3T3-Ll cells, respectively, were examined. CK suppressed the induction of PEPCK and G6Pase mRNA expressions under the dexamethasone/cAMP stimulation condition. CK also reduced the $PPAR-{\gamma}$ mRNA expression and triglyceride accumulation in a dose dependent manner as compared to the control. The present study suggests that CK deserves to examine whether it shows an anti-diabetic activity in animal and human studies.
The pathogenesis of cholestatic liver injury as well as the modulation of hepatic fibrogenesis is causally associated with involvement of reactive oxygen species (ROS) and free radical reactions. In this study, we investigated whether dried extracts of oriental medicine (LH) have antioxidant and antifibrotic effect under the biliary liver fibrosis (cirrhosis) c ondition. The female Sprague-Dawley rats were divided in six groups (Normal, N-LH, op-2, op-4, opLH-2, opLH-4) and were observed in 2 weeks or 4 weeks. For this purpose the rats were operated by bile duct ligation/scission (BDL/S), which induced to liver fibrosis and cirrhosis. After surgery, the prepared LH was administered p.o. 2 mι/day/rat in 2 weeks or 4 weeks for opLH groups. During the observation period, jaundices appeared in eyes, ears and tail of all BDL/S operated rats. And at the time of sacrifice, cholestasis was observed in proximal bile duct, especially the color of bile juice and urine in opLH-4 group showed more clear than op-2, op-4 and opLH-2 group. The value of clinical parameters and product of lipid peroxidation (MDA) in sera and the hydroxyproline (hyp) content in liver tissue were significantly increased in all liver fibrosis (cirrhosis) developed rats (p<0.001~0.05). Among the clinical parameters of sera, value of BUN, ALP in opLH-4 group showed significantly lower than in op-4 group (p<0.05, p<0.001). The content of hyp in opLH-2, opLH-4 group (478.0 $\pm$ 134.3 $\mu\textrm{g}$/g 897.5 $\pm$ 118.2 $\mu\textrm{g}$/g) showed lower than in op-2, op-4 group (528.9 $\pm$ 220.7 $\mu\textrm{g}$/g, 1023.8 $\pm$ 277.1 $\mu\textrm{g}$/g) and then the value of MDA in opLH-4 was also significantly reduced to 59.4% of that in op-4 group (p<0.001). The histological change (bile duct proliferation, fibrosis, collagen bundle) was similarly observed in op-2 group and in opLH-2 group, but the weak fibrosis and bile duct proliferation were observed in opLH-4 group compared with in op-4 group. Our data indicate that the 4 weeks treatment with LH extract suppressed lipid peroxidation and inhibited fibrotic (cirrhosis) process, and experimental cholestatic liver disease is associated with increased lipid peroxidation in BDL/S operated rats. Hence we concluded that the measurement of MDA and hyp can be useful monitor for the screening of antioxidant and antifibrotic effect in experimental liver fibrosis (cirrhosis), and LH has been shown to have hepatoprotective effect, antifibrotic effect and antioxidant effect.
The objective of the present study was to investigate the uptake process of 4-Phenylazobenzoxycarbonyl-Pro-Leu-Gly-Pro-D-Arg (Pz-peptide), a hydrophilic and collagenase-labile pentapeptide, by isolated hepatocytes. For comparison, the uptake of Pz-peptide by Caco-2 cells and colonic cells, two known paracellular routes of Pz-peptide, was also evaluated. A simple and sensitive reversed-phase HPLC assay method using UV detection has been developed. The coefficient of variation for all the criteria of validation were less than 15%. The method was, therefore, considered to be sutable for measuring the concentration of Pz-peptide in the biological cells. Pz-peptide was extensively uptaked into hepatocytes. The initial velocity of Pz-peptide uptake assessed from the initial slope of the curve was plotted as Eadie-Hofstee plots. The maximum velocity ($V_{max}$) and the Michaelis constant ($K_m$) were 0.190$\pm$0.020 $nmol/min/10^6$ cells and 12.1$\pm$3.23 $\mu$M, respectively. The permeability-surface area product ($PS{influx}$) was calculated to be 0.0157 ml/min/10^6$ cells. $V_{max}$ and $K_m$ values for Caco-2 cells were calculated to be 6.22$\pm$0.930 pmol/min/10^6$ cells and 82.8$\pm$8.37 $\mu$M, respectively, being comparable with those of colonocytes (6.04$\pm$1.03 pmol/min/10^6$ cells and 87.8$\pm$13.2 $\mu$M, respectively). $PS_{influx}$ values for Caco-2 cells and colonocytes were calculated to be 0.0751 $\mu$l/min/10^6$ cells and 0.0688 $\mu$l/min/10^6$ cells, respectively. The more pronounced uptake of Pz-peptide by hepatocytes, when compared with Caco-2 cells and colonocytes, is probably due to its specific transporter. In conclusion, Pz-peptide, a paracellularly transported pentapeptide in the intestine and ocular epithelia, was uptaked into hepatocytes extensively. Although Pz-peptide is able to be uptaked into the Caco-2 cells and colonocytes, it is less pronounced when compared with hepatocytes. $PS_{influx}$ values of Caco-2 cells and colonocytes for unbound Pz-peptide under linear conditions were less than 0.4% when compared with that of hepatocytes.
Journal of agricultural medicine and community health
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v.23
no.2
/
pp.287-293
/
1998
Although serum gamma-glutamyl transferase(GGT) has been widely used as a marker of alcoholic hepatic dysfunction, little is known as to behavioral correlates in the normal population. To examine the association between serum GGT activity and some behavioral factors in male rural population, data un health examination in a rural population (248 males aged 40 years and older) was analyzed Multiple linear regression and analysis of convariance were used to control the effect of confounding factors. Adjusted average differences in the level of serum GGT according to body mass index(BMI: $kg/m^2$) and alcohol intake(ml/day) were statistically significant(p=0.051 0<0.001 respectively). Serum GGT activity for BMII$\geq$25 was significantly higher than for BMI<25 in non-drinkers(p=0.007), but not significantly different in drinkers(p=0.892). Alcohol intake was significantly associated with elevated serum GGT activity for both BMI$\geq$25 and BMI<25(p<0.001, p=0.002 respectively). These findings suggest that alcohol drinking, obesity in non-drinkers are important factors associated with serum GGT in male rural population.
Park, Sa-hyun;Cho, Su-in;Chae, Woo-seok;Cho, Myung-rae
Journal of Acupuncture Research
/
v.22
no.1
/
pp.1-11
/
2005
Objective : The present study was carried out to investigate the preventive effect of Several Herb-combind Prescription(SHP) on Streptozotocin (STZ) -induced Diabetes mellitus. Methods : SHP was given to rats with the combination of oral administration and herbal-acupuncture stimulation. The experimental animals were divided into 3 groups : normal group of rats, control group of STZ-induced diabetic rats, sample group with SHP treatment. In vitro test of SHP showed ${\alpha}$-glucosidase inhibition, DPPH radical scavenging activity and inhibition of lipid peroxidation. Experimental diabetes was induced by the injection of STZ(60mg/kg) to the rat via the peritoneum. The effect of SHP on STZ-induced diabetes was observed by measuring the seum level of insulin, glucose, triglyceride, total cholesterol and lipid peroxides. Hepatic activities of catalase and reduced glutathione were examined and insulin granule was observed by immunohistochemical examination. Result : STZ caused hyperglycemia and hypoinsulinemia by a selectively destroying pancreatic ${\beta}$-cell. SHP treatment protected them from the hyperglycemia and hypoinsulinemia. STZ induced increase of serum triglyceride lowered by SHP treatment. And by SHP treatment, pancrease showed a big area with positive immuno-reactivity for presence of insulin with many insulin granules distributed in the ${\beta}$-cells in the islets of Langerhans. Contusions : The SHP treatment showed protective effect on diabetic rat model, and action mechanism of the effect was thought to be concerned with anti-oxidative stress.
Lovastatin is a lipid lowering agent for the treatment of hypercholesterolemia and belongs to a new class of pharmacologic compounds called the 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase inhibitors. By competitively inhibiting HMG CoA reductase, lovastatin disrupts the biosynthesis of cholesterol in hepatic and peripheral cells and increases the synthesis of high-density-lipoprotein HDL) receptors. Following oral administration, the lactone ring of lovastatin is hydrolysed to the active inhibitor of HMG CoA reductase, lovastatin acid. Lovastatin is known to have poor oral absorption and wide individual variation. In this study, bioequivalence test of two lovastatin formulations, the test drug ($Lovaload^{TM}$, Chong Kun Dang Pharmaceutical Co.) and the reference drug ($Mevacor^{TM}$, Chung Wae Pharmaceutical Co.) were conducted according to the guidelines of Korea Food and Drug Administration (KFDA). A total of 18 healthy male volunteers, $31.90\pm3.60$ years old and $72.17\;7.88$ kg of body weight in average, were evaluated in a randomized crossover manner with a 2-week washout period. Concentrations of lovastatin acid in plasma were measured upto 12 hours following a single oral administration of eight tablets (20 mg of lovastatin per tablet) by high-performance liquid chromatography with UV detection at 238 nm. The area under the concentration-vs-time curve from 0 to 12 hours $(AUC_{0-12h})$ was calculated by the trapezoidal summation method. The statistical analysis showed that there are no significant differences in $AUC_{0-12h),\;C_{max}\;and\;T_{max}$ between the two formulations ($6.72\%,\;1.52\%,\;and\;0.88\$, respectively). The least significant differences between the formulations at $\alpha$=0.05 were less than $20\%\;(11.65\%,\;19.73\%,\;and\;14.81\%\;for\;AUC_{0-12h},\;C_{max}\;and\;T_{max}$, respectively). The $90\%$ confidence intervals for these parameters were also within $\pm20\%\;(-1.50{\leq}{\delta}{\leq}15.00$, $-12.50{\leq}{\delta}{\leq}15.50,\;and\;-9.64{\leq}{\delta]{\leq}11.40{\leq}\;for\;\;AUC_{0-12h}$ ,$C_{max}\;and\;T_{max}$, respectively). In conclusion, the new generic product $Lovaload^{TM}$ was proven to be bioequivalent with the reference drug.
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