Purpose: The objective of this study was to examine the association of temperature-fluctuation with freshness quality in various foods. Methods: We investigated the effects of storage conditions on antioxidant activities of cherries and romaine lettuce during storage at $0.7{\pm}0.6^{\circ}C$, $1.2{\pm}1.4^{\circ}C$, and $1.6{\pm}2.8^{\circ}C$. Cherries and romaine lettuce were stored for a period of 9 days and 7 days, respectively. We also analyzed the effects of storage conditions on fresh quality of beef and salmon during storage at $-0.3{\pm}0.8^{\circ}C$, $-0.6{\pm}2.3^{\circ}C$, and $-1.5{\pm}4.4^{\circ}C$. Both of them were stored for a period of 14 days. Results: The amount of water loss was highest in beef, and the microbial count was also the highest at $-1.5{\pm}4.4^{\circ}C$. In the case of salmon, there was no difference in water loss according to storage, and TBA value was significantly increased at $-1.5{\pm}4.4^{\circ}C$. Moisture retention was the highest at $0.7{\pm}0.6^{\circ}C$ in both romaine lettuce and cherry samples. The contents of polyphenol and flavonoid were significantly higher in cherries, and content of polyphenols in romaine lettuce was significantly higher at $0.7{\pm}0.6^{\circ}C$ (p < 0.05). DPPH activity decreased in the order of $0.7{\pm}0.6^{\circ}C$ > $1.2{\pm}1.4^{\circ}C$ > $1.6{\pm}2.8^{\circ}C$ over 7 days. Conclusion: The results indicate that temperature-fluctuation may affect qualities of foods stored in a refrigerator.
Lee, Chang Jun;Lee, Du Sang;Kang, Jin Yong;Kim, Jong Min;Park, Seon Kyeong;Kang, Jeong Eun;Kwon, Bong Seok;Park, Sang Hyun;Park, Su Bin;Ha, Gi-Jeong;Heo, Ho Jin
Korean Journal of Food Science and Technology
/
v.49
no.5
/
pp.550-558
/
2017
The effect of Artemisia argyi H. under liquid-state fermentation by Monascus purpureus (AAFM) on cognitive impairments has been studied in a mice model of diabetes-associated cognitive decline induced by streptozotocin (STZ). C57BL/6 mice (9 weeks of age, male) were separated into four groups: a normal control, STZ-induced diabetic mouse group (STZ group), Artemisia argyi H. (AA) 10 group (diabetic mouse+AA 10 mg/kg/day), AAFM 10 group (diabetic mouse+AAFM 10 mg/kg/day). Administration of AA and AAFM significantly improved glucose tolerance, as shown by the intraperitoneal glucose tolerance test (IPGTT), and ameliorated cognitive deficit, as shown by the behavioral tests including passive avoidance, Morris water maze, and Y-maze tests. After behavioral tests, the cholinergic system was examined by assessment of the acetylcholine (ACh) level and acetylcholinesterase (AChE) inhibitory activity, and the antioxidant system was also assessed by measuring malondialdehyde (MDA) and superoxide dismutase (SOD) levels in the brain and liver.
Kim, Da Hye;Kim, Sang Jun;Jeong, Seung-Il;Yu, Kang-Yeol;Cheon, Chun Jin;Kim, Jang-Ho;Kim, Seon-Young
Journal of Life Science
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v.27
no.5
/
pp.509-516
/
2017
Perilla frutescens (L.) Britton var. sprouts (PFS) is a plant of the labiatae family. The purpose of this work was to assess the preventive effects of PFS ethanolic extracts (PFSEs) on cytokine-induced ${\beta}$-cell damage. Cytokines, which are released by the infiltration of inflammatory cells around the pancreatic islets, are involved in the pathogenesis of type 1 diabetes mellitus. The combination of interleukin-$1{\beta}$ (IL-1), interferon-${\gamma}$ (IFN-${\gamma}$), and tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$) induced formation of reactive oxygen species (ROS). Accumulation of intracellular ROS led to ${\beta}$-cell dysfunction and apoptosis. PFSEs possess antioxidant activity and thus lead to downregulation of ROS generation. Cytokines decrease cell viability, stimulate the expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2), and induce the production of nitric oxide (NO). PFSEs prevented cytokine-induced cell viability in a dose-dependent manner. Incubation with PFSE resulted in significant reduction in cytokine-induced NO production that correlated with reduced levels of the iNOS and COX-2 protein expression. Furthermore, PFSE significantly decreased the activation of nuclear factor ${\kappa}B$ (NF-${\kappa}B$) by inhibition of $I{\kappa}B{\alpha}$ phosphorylation in RINm5F cells. In summary, our results suggest that the protective effects of PFSE might serve to counteract cytokine-induced ${\beta}$-cell destruction. Findings indicate that consumption of Perilla frutescens (L.) Britton var. sprouts alleviates hyperglycemia-mediated oxidative stress and pro-inflammatory cytokine-induced ${\beta}$-cell damage and thus has beneficial anti-diabetic effects.
Kwon, Woo-Young;Lee, Eun-Kyoung;Yoon, Jin-A;Chung, Kang-Hyun;Lee, Kwon-Jai;Song, Byeong Chun;An, Jeung Hee
Journal of the Korean Society of Food Science and Nutrition
/
v.43
no.7
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pp.989-998
/
2014
We investigated the characteristics and biological activities of vinegars added with different levels (0%, 0.5%, 1%, 2%, and 3%) of young leaves of Akebia quinata. During alcohol fermentation, alcohol and total acidity contents of vinegars increased. During acid fermentation, total acidity and amino acid contents increased. Vinegar added with 3% A. quinata leaf showed the highest total sensory score. The contents of total polyphenols, flavonoids, and tannin significantly increased during fermentation according to the amount of A. quinata leaf. After 22 days of fermentation, total polyphenol, total flavonoid, and tannin contents of vinegar added with 3% A. quinata were 4,079.08 mg GAE/100 g, 2,927.08 mg CE/100 g, and 3,618.00 mg TAE/100 g, respectively. ABTS radical scavenging activity of vinegar added with 3% A. quinata was 79.63%. Anti-cancer activities of vinegar added with 3% A. quinata were 48.65% and 52.90% against MCF-7 and HepG2 cells, respectively. Vinegar added with 3% A. quinata showed anti-bacterial activities against Bacillus cereus, Shigella flexneri, Salmonella enterica, Bacillus subtilis, and Klebsiella pneumoniae. Our results demonstrate that the biological activities of vinegar added with 3% A. quinata leaf (22 days of fermentation) were excellent, and their enhanced total polyphenol, flavonoid, and tannin contents were associated with antioxidant, anti-cancer and anti-microbial activities. Thus, A. quinata can be used as a functional material in vinegar and other foods.
Shin, Jeong Yeon;Kang, Jae Ran;Shin, Jung Hye;Seo, Weon Taek;Byun, Hee Uk;Choi, Jin Sang;Kang, Min Jung
Journal of the Korean Society of Food Science and Nutrition
/
v.46
no.7
/
pp.779-789
/
2017
The effects of orally administered Seomaeyakssuk (Artemisia argyi H.) vinegar on lipid metabolism in Sprague-Dawley rats fed a high-fat and high-cholesterol (HFC) diet were analyzed. The experimental animals were divided into five groups: a normal diet group (normal, N), HFC diet group (control, C), HFC diet with lovastatin at 20 mg/kg body weight (B.W.) group (positive control, PC), HFC diet with malt vinegar group (TM), and HFC diet with Seomaeyaksuk vinegar group (TS) (2 mL/kg B.W.). After 4 weeks of feeding rats the experimental diet, contents of serum total lipids and total cholesterol levels of TM and TS groups were significantly lower than those of the PC group. Triglyceride contents of the TM and TS groups were not significantly different from those of the PC group but significantly lower than those of the C group. Content of serum high density lipoprotein-cholesterol was significantly lower than that of the N group but higher than that of the C group. Low density lipoprotein-cholesterol content of serum was 190.68 mg/dL in the TS group, which was the lowest except for the N group. Aspartate transaminase and albumin transaminase activities as a measurement of liver damage index were not significantly different between the TM, TS, and C groups. Serum thiobarbituric acid reactive substance content of the TS group was reduced to a similar level as the N group but was lower than that of the C group in the liver and significantly higher than that of the N group. Antioxidant activity of the TS group was 55.69% in serum, which was a similar to that of the N group, and was 52.39% in the liver, which was not significantly different than that of the C group. From these results, we conclude that Seomaeyakssuk vinegar improves serum lipid content as a result of the complex action of vinegar, an active ingredient of Seomaeyakssuk and a product of the fermentation process.
Background: Heme oxygenase-1 (HO-1) is known to modulates the cellular functions, including cell proliferation and apoptosis. It is known that a high level of HO-1 expression is found in many tumors, and HO-1 plays an important role in rapid tumor growth on account of its antioxidant and antiapoptotic effects. Cisplatin is a widely used anti-cancer agent for the treatment of lung cancer. However, the development of resistance to cisplatin is a major obstacle to its use in clinical treatment. We previously demonstrated that inhibiting HO-1 expression through the transcriptional activation of Nrf2 induces apoptosis in A549 cells. The aim of this study was to determine of the inhibiting HO-1 enhance the chemosensitivity of A549 cells to cisplatin. Materials and Methods: The human lung cancer cell line, A549, was treated cisplatin, and the cell viability was measured by a MTT assay. The change in HO-1, Nrf2, and MAPK expression after the cisplatin treatment was examined by Western blotting. HO-1 inhibition was suppressed by ZnPP, which is a specific pharmacologic inhibitor of HO activity, and small interfering RNA (siRNA). Flow cytometry analysis and Western blot were performed in to determine the level of apoptosis. The level of hydrogen peroxide ($H_2O_2$) generation was monitored fluoimetrically using 2',7'-dichlorofluorescein diacetate. Results: The A549 cells showed more resistance to the cisplatin treatment than the other cell lines examined, whereas cisplatin increased the expression of HO-1 and Nrf2, as well as the phosphorylation of MAPK in a time-dependent fashion. Inhibitors of the MAPK pathway blocked the induction of HO-1 and Nrf2 by the cisplatin treatment in A549 cells. In addition, the cisplatin-treated A549 cells transfected with dither the HO-1 small interfering RNA (siRNA) or ZnPP, specific HO-1 inhibitor, showed in a more significantly decrease in viability than the cisplatin-only-treated group. The combination treatment of ZnPP and cisplatin caused in a marked increase in the ROS generation and a decrease in the HO-1 expression. Conclusion: Cisplatin increases the expression of HO-1, probably through the MAPK-Nrf2 pathway, and the inhibition of HO-1 enhances the chemosensitivity of A549 cells to cisplatin.
This study investigated the hepatoprotective effects of an ethanol extract of lotus root (LRE) on alcohol-induced liver damage in rat. Sprague-Dawley rae weighing $100{\sim}150g$, were divided into 6 groups: basal diet group (BD), alcohol (35% 10 mL/kg/day) teated stoup (ET), LRE 200 mg/kg/day teated group (BD-LREL). LRE 400 mg/kg/day treated group (BD-LREH), LRE 200 mg/kg/day and alcohol treated group (ET-LREL), and LRE 400 3mg/kg/day and alcohol teated group (ET-LREH). After the administration, rats were sacrificed to get serum and liver to analyze antioxidant enzyme activity, glutathione and lipid peroxide contents. The body weight gain and feed efficiency ratio were decreased by alcohol administration, however, were gradually increased to a little lower level than the basal diet group by the combined administration of alcohol and LRE. The serum alanine aminotransferase (ALT), asparate aminotransferase (AST) and alkaline phosphatase (ALP) activities that were elevated by alcohol were significantly decreased by LRE administration. It was also observed that thiobarbituric acid reactive substances (TBARS) content, xanthine oxidase (XO), superoxide dismutase (SOD), catalase and glutathione peroxidase (GSH-Px) activities in liver that were increased by alcohol, were markedly decreased in the combined alcohol and LRE administered groups as compared with the alcohol administrated group. These effect of LRE within the alcohol groups were in a dose-dependent manner. The glutathione (GSH) content in liver was decreased by alcohol administration, however, increased after administering LRE. Teken together, these result suggest that ethanol extract of lotus root may have a possible protective effect on liver function in hepatotoxicity-induced rat by alcohol administration.
Total phenolic compounds and antioxidative activities of rooibos tea(Aspalathus linearis) fractions were studied. Three extracts, using hexane, ethyl acetate, and ethanol, were prepared. Total phenolic compounds were 3069.3 mg/100 g extract in the hexane fraction, 18604.4 mg/100 g extract in the ethyl acetate fraction, and 13458.8 mg/100 g extract in the ethanol fraction. Levels of vanillic acid, caffeic acid, syringic acid, 4-coumaric acid, and ferulic acid were analyzed by RP-HPLC, and totals of 3452.6 and 3156.1 mg/100 g of extract were found in the ethanol and ethyl acetate fraction, respectively. In the DPPH assay, the ethanol fraction(82.2% of contol) and the ethyl acetate fraction(78.9%) showed the highest free radical scavenging capacities. The induction period of each tea fraction in the fish oil rancimat assay was measured. When 500 ppm of the ethanol fraction was applied, a 1.19 h induction period was observed. This was 2-fold greater than the induction period of the control.
This study was designed to investigate the effect of garlic shoot extract administration on serum and liver tissue lipid levels in hyperlipidemic rats. The rats were fed a 45% high-fat diet to induce hyperlipidemia. They were then administered garlic shoot extract (50%) and ethanol extract (75%) at 200 mg/kg B.W./day (GSA-1, GSB-1) and 400 mg/kg B.W./day (GSA-2, GSB-2) for 5 weeks. The total lipid and triglyceride contents in serum were lowest in the GSB-2 group, and the total cholesterol content was significantly lower in the GSA-2 and GSB-2 groups than in the control group. The high density lipoprotein (HDL)-cholesterol content of the GSB-2 group was similar to that of the normal group. The low density lipoprotein (LDL) and very low density lipoprotein (VLDL)-cholesterol contents were significantly lower in the GSB-1 and GSB-2 group than in the control group. atherogenic index (AI) and cardiac risk factor (CRF) were lowest in the GSB-2 group (0.58 and 1.57, respectively). Aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) activities were significantly higher in the control group than in the normal group, and the levels of AST, ALT, and ALP were significantly lower in the GSA-2 and GSB-2 groups than in the control group. The total lipid content in liver tissue was significantly lower in all the experimental groups compared to that of the control group, but it was not significantly different among the experimental groups. The total cholesterol and triglyceride content in liver tissue was lowest in the GSB-2 group. Antioxidant activity in serum and liver tissue was highest in the GSB-2 group (40.16% and 47.41%, respectively).The thiobarbituric acid reactive substance (TBARS) content in serum and liver tissue was lowest in the GSB-2 group, with the significant difference. Our results suggest that garlic shoot extracts may improve lipid metabolism in serum and liver tissue and potentially reduce hyperlipidemia.
Hizikia fusiforme is a kind of brown edible seaweed that mainly grows in the temperate seaside areas of the northwest pacific, including Korea, Japan and China, and has been widely used as a health food for hundreds of years. Recently, H. fusiforme has been known to exert pharmacological activities including antioxidant, antimutagenic and anticoagulant activities. However, the molecular mechanisms of H. fusiforme in malignant cells have not been clearly elucidated yet. In this study, the effects of ethyl alcohol extract of H. fusiforme (EAHF) on the anti-proliferative effects of MDA-MB-231 and MCF-7 human breast cancer cells were investigated. EAHF treatment resulted in a concentration-dependent growth inhibition by including apoptosis in MDA-MB-231 cells and G1 phase arrest in MCF-7 cells, which could be proved by MTT assay, DAPI staining, agarose gel electrophoresis and flow cytometry analysis. In MDA-MB-231 cells, the increase in apoptosis induced by EAHF treatment correlated with up-regulation of pro-apoptotic Bax expression. EAHF treatment induced the proteolytic activation of caspase-3 and caspase-9, and a concomitant inhibition of poly (ADP-ribose) polymerase, $\beta$-catenin, phospholipase-${\gamma}1$ protein and DNA fragmentation factor 45/inhibitor of caspase-activated DNase. Taken together, these findings provide important new insights into the possible molecular mechanisms of the anti-cancer activity of H. fusiforme.
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