Kim, Jang-Oh;Shin, Ji-Hye;Jung, Do-Young;Jeon, Chan-hee;Lee, Ji-Eun;Lee, Yoon-Ji;Min, Byung-In
Journal of the Korean Society of Radiology
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v.14
no.5
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pp.553-561
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2020
In this study aims to investigate the radiation protection effect of avocado peel extracts on the Sprague-Dawely rats. 52 male rats were randomly classified into 4 groups. NC Group was a normal control group, PA Group was a group injected avocado peel extracts, IR Group was irradiated group, and lastly PA+IR Group was set as an irradiated group after injected of avocado peel extracts. Avocado peel extract was administered orally at 200 mg/kg once a day for 14 days before irradiation, and the radiation dose was systemically irradiated with 6 MV X-ray of 7 Gy. On the 4 and 21 days after irradiation, the experimental animals were sacrificed to evaluate the change in blood cell composition, spleen index, and histopathological evaluation of the liver and small intestine. As a result, the PA+IR Group showed a significantly greater recovery of lymphocytes(p<0.01), red blood cells(p<0.01), and platelets(p<0.05) than the IR Group. It was also confirmed that the activation of Superoxide Dismutase(SOD) was further increased. Histopathologically, observed that nuclei aggregation and cytoplasmic expansion were slightly reduced in the PA+IR Group in the liver. and the damage was significantly reduce(p<0.01) in the change of villi length due to damage to the small intestine cells. Based on the above results, avocado peel extract can be expected to act as a radiation protection agent that can reduce damage to blood cells and major organs caused by irradiation.
To investigate the role of vitamin E in protection against lipid per-oxide formation and to monitor the changes in the status of vitamin E. A and reduced glutathione(GSH) in fish oil feeding male Sprague-Dawley rats were divided into four groups. Control group was fed soybean oil and fish oil groups(FO, FI, FII) fed menhaden oil and soybean oil(9:1) mixture at the level of 10% (w/w) respectively. Dietary vitamin E levels were 30 T, E for control and FI, 2 T.E. for FO and 140 T. E for FII Feeding periods were 4, 8, and 16 weeks. Throughout all periods plasma vitamin E levels(either per ml or per mg lipid) of FO group were extremely low and liver and adipose tissue vitamin E levels were also the lowest among four groups, Plasma vitamin E levels per ml were lower in FI and FII than control but per mg lipid were in the order of FII>FI$\geq$control but vitamin E level per mg lipid did not differ in liver and adipose tissue. As feeding prolonged vitamin E levels in plasma and other tissue were decreased in FO but increased in the other groups. Plsama and liver thiobarbituric acid-reactive substance(TBARS) values were elevated in FO. but increased in the other groups. Plasma and liver thiobarbituric acid-reactive substance(TBARS) values were elevated in FO. While plasma TBARS values as per ml plasma were similar or lower in FI and FII as compared to control plasma TBARS values as per mg lipd and liver TBARS values were in the order of $FI\geqFII>control.$ Plasma and liver vitamin A blood GSH but not liver GSH appeared to be in the order of FII control>FI>FO and this was most significant in 8 weeks. This results suggests that both type of dietary oil and levels of vitamin E affect not only lipid peroxidation but also the status of other physiological antioxidants which have the potential to spare the role of vitamin E.
Journal of the Korean Society of Food Science and Nutrition
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v.24
no.6
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pp.867-873
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1995
This study was done ot investigate the effect of chronic alcohol feeding and acetylaminofluorene(2-AAF) treatment on hepatic mitochondrial ATPase activity andmembrane lipid composition. Male Sprague-Dawley rats, weighing 120~125g, were fed for 6 weeks on a liquid diet containing 35% of calories as ethanol. After 4 weeks of experiment diet feeding, 2-AAF(100mg/kg body weight) was injected twice a week intraperitoneally. Body weight and percent liver weight per body weight were significantly changed by ethanol feeding. Hepatic mitochondrial ATPase activity significantly decreased by ethanol feedings but not by 2-AAF treatment. In comparison to control, the ATPase activity of ethanol-AAF group decreased 29.3%. Since phospholipid(PL) content of mitochondria has an interaction effect between ethanol and 2-AAF treatment, 2-AAF treatment significantly increased phospholipid content in only ethanol fed group. Total cholesterol(C) level of mitochondria significantly increased by ethanol feeding. Consequently C/PL ratio of ethanol group was significantly higher than that of control group. The analysis of mitochondrial PL composition showed that cardiolipin(CL) significantly increased by 2-AFF treatment in control group. Phosphatidyl choline(PC) significantly increased by ethanol feeding, whereas PC significanlty decreased and phosphatidyl ethanolamine(PE) significantly increased by 2-AAF treatment. 2-AAF treatment also showed a significant increase in PE/PC ratio. Fatty acid patterns of mitochondria were also changed by either ethanol or 2-AAF although the severity of the changes was not great. These data suggest that the reduced mitochondrial ATPase activity in ethanol-AAF group may be a consequence of a changes in mitochondrial membrane lipid composition such as PE/PC ratio, C/PL ration and fatty acid patterns.
The large number of past investigation on extended myocardial protection clearly indicates that cold potassium cardioplegia and topical cooling have limited capabilities. Accordingly, more recent experimen- tal approaches have focused on the modalities of reperfusion and their implication on postischemic myo- cardial recovery. Oxygen may play a crucial role in the development of ischemic and reperfusion injury. Reactive oxygen radicals may be produced during ischemia or reperfusion after incomplete reduction of molecular oxygen or from other pathway and then induce fatal injury of the heart. The important obser- vation of oxygen-induced myocardial damage during reperfusion has led to the concept of applying oxy- gen free radical scavengers. So, this study is on dietary vitamin C supplementation as antioxidant in rats to determine whether or not they have a higher tolerance against cardiac ischemia-reperf'usion injury under Langendorff system. Male or female Sprague-Dawley rats (190-33Og) were randomly separated into two groups. Group A was not treated(n=10). Group B received vitamin C supplement (n=10). Experiment was performed 24 hours after vitamin C 200mg fed orally as injectable ascorbic acid. There were significant differences in contractile parameters between control and vitamin C-treated group. The RLVP (r te of post/preischemic left ventricular pressure) and Rdp/dt (rate of post/preischemic dp/dt) were significant statistically between two groups (p<0.05). But, RHR (rate of post/preischemic heart rate), time to first beat and sta'utilization were not significant. In conclusion, pretreatment with the antioxidant, ascorbic acid, was found to preserve left ventricular contractile function. But the precise mechanism of action of ascorbic acid has not as yet been determined, so further study will be required.
An in vivo oral glucose tolerance test (OGTT) was performed on hyperglycemic male Sprague-Dawley rats to assess the effect of fruits and vegetables ($1g{\cdot}kg^{-1}$ body weight) on blood glucose levels (${\Delta}BGLs$) at different time intervals of 0, 5, 15, 30, 60, 90 and 120 min. The areas under glucose curve (${\Delta}AUCs$) were calculated at 120 min of OGTT by trapezoid method. Total phenolic content (TPC) and anti-oxidant activity (AOA) of fruits and vegetables were assayed in vitro by Folin Ciocalteu and DPPH (2, 2-diphenyl-1-picrylhydrazyl) methods, respectively. At the end of the experiment the correlations among the parameters TPC, AOA and ${\Delta}AUC$ was estimated by Pearson's correlations. Among fruit crops, tangerine, plum, grape and pear and among vegetables, blue leaf mustard, cabbage, chicory, broccoli and others exhibited significant hypoglycemic effects by reducing ${\Delta}BGLs$ with significant ${\Delta}AUC$. The effective ${\Delta}AUC$ ranged from $5548.2{\pm}462.1$ to $3823.3{\pm}282.0mg-min{\cdot}dL^{-1}$. The TPC and AOA ranged from $0.063{\pm}0.00$ to $0.913{\pm}0.14mg{\cdot}g^{-1}$ GAE and $01.05{\pm}0.08$ to $75.46{\pm}0.06%$, respectively. Overall, six fruits and fifteen vegetables exhibited higher TPC and one fruit and four vegetables exhibited higher AOA. There was a better correlation among TPC, AOA and ${\Delta}AUC$ of fruits and TPC & AOA of vegetables. We report that hypoglycemically significant fruits and vegetables investigated in this study have pharmacological importance which reduced ${\Delta}BGLs$ through insulin like activity and AOA in prevention of type-2 diabetes.
The purpose of this study was to Prove that the medial edge epithelial cells covering the secondary palatal shelves were removed by apoptosis during palatal fusion. 12 mature female rats (Suprague-Dawley) were mated overnight with male rats and sacrificed on days 15.0, 16.5, 16.75, 17.0 of pregnancy. The embryos were removed from the uterus and the heads were embedded in paraffin. The paraffin blocks were sectioned and the sections were undergone H-E staining for general histologic feature and TdT staining for detection of apoptotic cells. The obtained results were as follows. k. In the section of 16.0 and 16.5 day embryos, the palatal shelves were prior to contact and no apoptotic cells wereobserved in the medial edge epithelium. At the initial contact of Palatal shelves, there was a few apoptotic cells in the fusing epithelium. 2. In the 16.75 day embryos, the samples that epithelial seams did not lost there continuity, apoptotic cells were rarely seen at the midline epithelial seam. In contrast, a lot of apoptotic cells were observed at epithelial triangles and the junction between palatal shelves and nasal septum. 3. In the 16,75 day embryos, the samples that epithelial seams lost their continuity and disrupted to epithelial islands, large number, of apoptotic cells were observed at epithelial islands and epithelial triangles. Some apoptotic cells were also observed at the oral, nasal epithelium near the midline. 4. In the 17.0 day embryos, most of epithelial islands were disappeared and mesenchymal confluence was achieved. Apoptotic cells were rarely observed in the mesenchymal tissue which replaced epithelial islands, but there were some apoptotic cells at the epithelial triangles, oral and nasal epithelium. From the results of the study, it was revealed that medial edge epithelial cells of fusing palate were removed by apoptosis. Apoptotic cells were found mainly in the disappearing midline epithelial seam and the oral and nasal epithelial triangles at some late stages of palatal fusion.
Journal of the Korean Society of Food Science and Nutrition
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v.35
no.10
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pp.1336-1342
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2006
This study was performed to investigate the effect of ethanol extract of Chaenomeles sinensis Koehne (CS) on alcohol-induced liver damage in rats. Male Sprague-Dawley rats weighing $135{\pm}10g$ were divided into 6 groups for 4 weeks; normal group (ND), alcohol (35%, 10 mL/kg/day) treated group (ET), CS ethanol extract 200 mg/kg/day treated group (ND-CSL), CS ethanol extract 400 mg/kg/day treated group (ND-CSH), CS ethanol extract 200 mg/kg/day and alcohol treated group (ET-CSL), and CS ethanol extract 400 mg/kg/day and alcohol treated group (ET-CSH). The body weight gain and food efficiency ratio were no differences between ND and ET. There were increases in the activities of serum alanine aminotransferase (ALT), asparate aminotransferase (AST), and alkaline phosphatase (ALP) in ET. On the other hand, the administration of CS decreased ALT, AST and ALP activities in serum. It was also observed that the hepatic activities of superoxide dismutase (SOD), catalase, glutathione peroxidase (GSH-Px) and xanthine oxidase (XO) increased by alcohol treatment were also markedly decreased in the CS administered groups as compared with ET. The activities of hepatic SOD, catalase, GSH-Px and XO were riot significantly different among the normal diet groups. Contents of thiobarbituric acid reactive substances (TBARS) were increased by the administration of alcohol, on the other hand, the administration of CS reduced TBARS value in the liver. In addition, the content of glutathione (GSH) in the liver was decreased by alcohol administration, however, GSH increased after administering CS. In conclusion, the administration of alcohol develops the hyperoxidation of liver lipids through tile increase in enzymes activity related to the lipid peroxiation, however, it was decreased after administring CS. Thus, CS may have a possible protective effect on ethanol-induced hepatotoxicity in rat liver.
Previously, we have shown that green tea extract lowers the intestinal absorption of cholesterol, fat, and other fat-soluble compounds. We conducted this study to determine whether green tea extract affects the rate of $^{14}C$-oleic acid esterification into various lipids in the intestinal mucosa of rats. Male Sprague-Dawley ruts were had free access to a nutritionally adequate AIN-93G diet and deionized water. Initially, the rat's mucosal content of total lipids was measured following 1 mL olive oil administration with (green tea group) or without (control group) 100 mg green tea extract powder. At 1 h and 5 h, intestinal segments were extracted for total lipid analysis. Secondly, to measure mucosal esterification rates of lipids, an abdominal incision was made along the midline, and a 10-cm long jejunal segment of the small intestine was ligated in situ. Then, micellar solutions with or without green tea extract were injected into the ligated jejunal segments and incubated for 10 mill. The micellar solution contained $200.0\;{\mu}$ Ci $^{14}C$-oleic acid, $200.1\;{\mu}mol$ unlabelled oleic acid, $66.7\;{\mu}mol$ 2-monooleoylglycerol, $66.7\;{\mu}mol$ palmitoyl-sn-glycero-3-phosphocholine, 2.2 mmol glucose, $50.0\;{\mu}mol$ albumin, and 16.5 mmol Na-taurocholate per L of phosphate buffered saline (pH, 6.3) with or without 8.87 g green tea extract powder. At 10 min, each rat was sacrificed by cervical dislocation under anesthesia and the segment was removed for lipid analysis. Significant differences were observed in mucosal triglyceride content at 1 h and 5 h in ruts given green tea extract. Significant differences in the rate of $^{14}C$-oleic acid esterification into triglycerides and phospholipids fractions were observed between control and green tea groups. However, There were no significant differences in other lipid fractions. These results indicate that the lowered esterification rates of $^{14}C$-oleic acid into triglycerides and phospholipids fractions is attributable to presence of green tea extract. This may be associated with an inhibitory effect of green tea catechin on the mucosal processes of lipids, leading to the inhibition of intestinal absorption of lipids.
Park, Junseok;Kwon, Young-Sook;Lee, Eunryoung;Kwon, Kisang
Journal of Life Science
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v.24
no.6
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pp.686-693
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2014
Restricted supply of nutrients may affect genes at the molecular level as well as physiological functions. Understanding the cellular responses during starvation is necessary for developing strategies to reduce damage caused by starvation stress. After 1 h of starvation, Got1 gene expression was increased but its expression returned to the normal state after 24 h. Mat1 gene expression continuously increased with starvation from 1 h until 24 hr. Rats starved for 1-3 days showed significant changes in expression of the Got1 and Mat1 genes, which were significantly reduced in the cerebral cortex and cerebellum. In the lung, gene expression was increased by starvation for 1-2 days but decreased on the third day. No differences were observed in gene expression in the heart. Strong Got1 lung gene expression was seen in the starvation group one day after restoration of the food supply. Muscle mass was significantly reduced at the start of starvation and remained the same after two days of starvation and one day after the food supply was restored. The Mat1 gene expression did not change. The Got1 was induced by NaCl and showed strong expression in the lung and the thymus, but the apparent decrease of the remaining changes were not observed in male rats. The Mat1 gene was not as sensitive as the Got1 gene to induction by NaCl. However, differences in gene induction by NaCl were evident between males and females, indicating that diet control of gene expression is associated with hormones.
Journal of the Korean Society of Food Science and Nutrition
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v.38
no.5
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pp.561-568
/
2009
To investigate the effects of garlic and medicinal plants extracts (GP) on liver function and lipid metabolism of rat administered with ethanol chronically, Sprague-Dawly male rats were fed with a basial diet (Normal), a basial diet plus ethanol (Control, 10 mL of 20% ethanol/kg b.w/day), a control diet plus 0.5% garlic and 1.0% medicinal plants extracts (GP-I), and a control diet plus 1.0% garlic and medicinal plants extracts (GP-II) for 4 weeks. Blood glucose in GP group was significantly decreased, but not significantly different between GP-I and GP-II group. Albumin content of serum was significantly increased in GP groups, while total lipid, cholesterol and triglyceride of serum were significantly decreased in GP group. Total cholesterol and triglyceride were not significantly different between GP-I and GP-II group. LDL-cholesterol in blood was decreased to 58% in GP-I group and 73% in GP-II group compared to the control group, it's contents were the lowest amounts among the normal, control and experimented groups. Lipid levels in liver of rat administered with alcohol were decreased in GP group and significantly different in GP-II group. GOT and r-GTP activities were significantly higher in control than normal group, while GPT and ALP activities were not significant in groups administered with alcohol. Activities of GOT, GPT and r-GTP were significantly lower in GP group than control group, while ALP activity was not significant in all groups. TBARS contents were not significant in serum, but it's contents in liver were significantly decreased in GP groups than control group. DPPH radical scavenging ability in serum and liver was significantly increased in GP groups. These results indicate that garlic and medicinal plants extracts were effective in improving and protecting liver disorder induced from long-term alcohol consumption.
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