The objective of present study was to investigate the anti oxidative and hepatoprotective effects of tomato extracts. Total antioxidant capacity and total antioxidant response were 5.5 and $19.8{\mu}g$ Trolox equivalent per mg of tomato extract, respectively. DPPH radical scavenging activity of tomato extracts ($10mg\;ml^{-1}$) was 70% as compared to 100% by pyrogallol solution as a reference. The effect of the tomato extracts on lipid peroxidation was examined using rat liver mitochondria induced by iron/ascorbate. Tomato extracts at the concentration of $0.5mg\;ml^{-1}$ significantly decreased TBARS concentration. Tomato extracts prevented lipid peroxidation in a dose-dependent manner. The effect of the tomato extracts on reactive oxygen species (ROS) generation was examined using cell-free system induced by $H_2O_2/FeSO_4$. Addition of $1mg\;ml^{-1}$ of tomato extracts significantly reduced dichlorofluorescein (DCF) fluorescence. Tomato extracts caused concentration-dependent attenuation of the increase in DCF fluorescence, indicating that tomato extracts significantly prevented ROS generation in vitro. The effect of tomato extracts on cell viability and proliferation was examined using hepatocyte culture. Primary cultures of rat hepatocytes were incubated with 1mM tert-butyl hydroperoxide (t-BHP) for 90 min in the presence or absence of tomato extracts. MTT values by addition of tomato extracts at the concentration of 2, 10, and $20mg\;ml^{-1}$ in the presence of t-BHP were 13, 33 and 48%, respectively, compared to 100% as control. Tomato extracts increased cell viability in a dose-dependent manner. These results demonstrate that tomato extracts suppressed lipid peroxidation and t-BHP-induced hepatotoxicity and scavenged ROS generation. Thus antioxidant and hepatoprotective effects of tomato extracts seem to be due to, at least in part, the prevention from free radicals-induced oxidation, followed by inhibition of lipid peroxidation.
고려인삼학회 1998년도 Advances in Ginseng Research - Proceedings of the 7th International Symposium on Ginseng -
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pp.270-280
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1998
Ginseng is one of the most widely used medicinal plants, particularly in East Asian countries. Certain fractions or purified ingredients of ginseng have been shown to exert inhibitory effects on growth of cancer cells in culture or on tumorigenesis in experimental animals. Moreover, a recent epidemiologic study reveals that ginseng intake is associated with a reduced risk for environmentally related cancers such as esophageal, gastric, colorectal, and pulmonary tumors. Heat treatment of Panax ginseng C. A. Meyer at the temperature higher than that applied to the conventional preparation of red ginseng yielded a mixture of saponins with potent antioxidative properties. Thus, the methanol extract of heat-processed ginseng (designated as'NGMe') attenuated lipid peroxidation in rat brain homogenates induced by ferric ion or ferric ion plus ascorbic acid. Furthermore, the extract protected against strand scission in f Xl 74 supercoiled DNA Induced by UV photolysis of H2O2 and was also capable of scavenging superoxide generated in vitro by xanthine/xanthine oxidate or in differentiated human promyelocytic leukemia (HL-60) cells by the tumor promoter,12-0-tetvade- canoylphorbol-13-acetate (TPA). Since tumor promotion is closely linked to oxidative stress, we have determined possible anti-tumor promotional effects of NGMe on two-stage mouse skin tumorigenesis. Topical application of NGMe onto shaven backs of female ICR mice 10 min prior to TPA significantly ameliorated skin papillomagenesi s initiated by 7,12-dimethylbenz (a) anthracene (DMBA).'Likewise, TPA-induced epidermal ornithine decarboxylase activity and elevation of tumor necrosis factor-a were suppressed signifies%fly by NGMe pretreatment. NGMe topically applied onto surface of hamster buccal pouch 10 min before each topical application of DMBA inhibited oral carcinogenesis by 76olo in terms of multiplicity. Taken together, these results suggest that processed Panax ginseng C. A. Meyer has potential cancer chemopreventive activities.
Alzheimers disease (AD) is the most prevalent form of neurodegenerations associated with aging in the human population. This disease is characterized by the extracellular deposition of beta-amyloid (A ${\beta}$) peptide in cerebral plaques. The A ${\beta}$ peptide is derived from the ${\beta}$-amyloid precursor protein ( ${\beta}$APP). Photolytic processing of ${\beta}$APP by ${\beta}$-secretase(beta-site APP-cleaving enzyme, BASE) and ${\gamma}$-secretase generates the A ${\beta}$ peptide. Several lines of evidence support that A ${\beta}$-induced neuronal cell death is major mechanisms of development of AD. Accordingly, the ${\beta}$-and ${\gamma}$-secretase have been implicated to be excellent targets for the treatment of AD. We previously found that sesaminol glucosides have improving effect on memory functions through anti-oxidative mechanism. In this study, to elucidate possible other mechanism (inhibition of ${\beta}$-and ${\gamma}$-secretase) of sesaminol glucosides, we examined the improving effect of sesaminol glucosides in the scopolamine (1 mg/kg/mouse)-induced memory dysfunction using water maze test in the mice. Sesaminol glucosides (3.75, 7.5 mg/kg/6ml/day p.o., for 3 weeks) reversed the latency time, distance and velocity by scopolamine in dose dependent manner. Next, ${\beta}$-and ${\gamma}$-secretase activities were determined in different regions of brain. Sesaminol glucosides dose-dependently attenuated scopolamine-induced ${\beta}$-secretase activities in cortex and hippocampous and ${\gamma}$-secretase in cortex. This study therefore suggests that sesaminol glucosides may be a useful agent for prevention of the development or progression of AD, and its inhibitory effect on secretase may play a role in the improving action of sesaminol glucosides on memory function.
Objectives : The gnarl of Pinus densiflora, called Songjeol in Korea, has been used as a medicinal herb for the treatment of inflammatory-related diseases such as arthralgia, myalgia and bruise. However, the molecular actions and mechanisms have not been clearly investigated. The aim of this study was to clarify the anti-inflammatory activity of Pinus densiflora gnarl pharmacopuncture (PDGP) in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. Methods : Cytotoxicity was assessed by XTT assay. The amount of nitric oxide (NO) production was determined by nitrite assay. The mRNA expressions of interleukin-$1{\beta}$ (IL-$1{\beta}$), interleukin-6 (IL-6), cyclooxygenase-2 (COX-2) and heme oxygenase-1 (HO-1) were analyzed by RT-PCR. Reactive oxidative species (ROS) generation was measured using the fluorescence microscopy. In addition, inducible nitric oxide synthase (iNOS) and redox factor-1 (Ref-1) protein expressions were detected by Western blotting. Results : PDGP inhibited NO production and ROS generation in LPS-stimulated RAW264.7 cells. At the mRNA level, PDGP suppressed IL-$1{\beta}$, IL-6 and COX-2 expression. On the other hand, PDGP induced HO-1 mRNA expression. Furthermore, PDGP suppressed iNOS and Ref-1 protein expression. Conclusions : This result suggests that PDGP can act as a suppressor agent on NO and iNOS through induction of HO-1, and play an useful role in blocking inflammatory responses.
Objectives: This study was designed to evaluate the macrophages polarization of traditional Korean medicine on cardiac pain about Geum-Gwe-Yo-Ryak's two prescriptions including Kwaruhaebaekbanha-tang (KHB) and Kwaruhaebaekpaekju-tang (KHP). Materials and methods: Flow cytometry analysis was used to measure the changes in the ratio of M1 type and M2 type macrophages. Protein expression of nuclear factor-like 2 (Nrf2), heme oxygenase-1 (HO-1), inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2) were measured by Western Blot, and ABCA1 and SR-B1 were detected by real time PCR (RT-PCR). Intracellular lipid accumulation was measured by Oil Red O staining (ORO staining). Results: KHB and KHP increase anti-oxidative activity related protein levels including Nrf2 and HO-1. Furthermore, KHB and KHP inhibit lipid accumulation on intracellular levels through induction of ATP binding receptor cassette subfamily A member 1 (ABCA1) and scavenging receptor class B member 1 (SR-B1), respectively. Finally, KHB and KHP also blocked pro-inflammatory mediators including tumor necrosis factor-alpha ($TNF{\alpha}$) and interleukin-6 (IL-6), iNOS and COX-2 expression. Conclusion: This study suggests that KHB and KHP potently regulate the M1/M2 macrophage polarization.
Kim, Jin-Woo;Park, Hyo-Jin;Yang, Seul-Gi;Koo, Deog-Bon
한국동물생명공학회지
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제35권4호
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pp.347-356
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2020
Gangliosides are glycolipids in which oligosaccharide is combined with sialic acids. Our previous studies have suggested an interplay between ganglioside GD1a/GT1b and meiotic maturation capacity in porcine oocyte maturation. Furthermore, ganglioside GD1a and GT1b are known for its antioxidant activity, but it is still unclear whether possible antioxidant role of GD1a and GT1b is involved in porcine embryos development competence during in vitro culture (IVC). Here, the effects of ganglioside GD1a and GT1b on the embryonic developmental competence during in vitro culture of porcine were investigated. The effects of ganglioside GD1a and GT1b on the expression of ST3GAL2 were confirmed during embryos development (2-cell, 4-cell, 8-cell and blastocyst) using immunofluorescent staining (IF). As a result, the fluorescent expression of ST3GAl2 was higher in embryos at 4-8 cells stage than blastocysts. Blastocyst development rate significantly increased in only 0.1 μM GD1a and GT1b treated groups compared with control group. To investigate the cellular apoptosis, we analyzed TUNEL assay. In case of only 0.1 μM GD1a and GT1b treated groups, the total number of cells in blastocyst compared with control group, but there was no significant difference in the rate of apoptotic cells. We identified the intracellular ROS levels using DCF-DA staining. According to the result, ROS production significantly decreased in blastocysts derived from the 0.1 μM GD1a and GT1b treated groups. These results suggest that ganglioside GD1a and GT1b improve the developmental competence of porcine embryos via reduction of intracellular ROS during preimplantation stage.
Objectives : The aim of this study was to investigate the effect of baicalein (BA) on the production of hydrogen peroxide in peptidoglycan-stimulated RAW 264.7 mouse macrophages. Methods : Peptidoglycan-stimulated RAW 264.7 were incubated with baicalein at concentrations of 50 and 100 µM. Incubation time is 30 min, 2 h, 12 h, and 18 h. After incubation, The production of hydrogen peroxide in RAW 264.7 was measured with dihydrorhodamine 123 assay. Berberine and gallic acid were used as the comparative materials. Results : BA at the concentration of 50 and 100 µM did not show cytotoxicity on RAW 264.7 for 24 h incubation. For 30 min, 2 h, 12 h, and 18 h incubation, BA at the concentration of 50 and 100 µM significantly inhibited the production of hydrogen peroxide in RAW 264.7 stimulated by peptidoglycan (p<0.05). In details, production of hydrogen peroxide in peptidoglycan-stimulated RAW 264.7 treated for 30 min with BA at concentrations of 50 and 100 µM was 93.91% and 93.52% of the control group treated with peptidoglycan only, respectively; the production of hydrogen peroxide for 2 h was 93.8% and 92.71%, respectively; production of hydrogen peroxide for 12 h was 94.86% and 95.93%, respectively; production of hydrogen peroxide for 18 h was 95.37% and 96.48%, respectively. Conclusions : BA might have anti-oxidative activity related to its inhibition of hydrogen peroxide production in peptidoglycan-stimulated RAW 264.7 macrophages.
Seong, Hye Rim;Wang, Cuicui;Irfan, Muhammad;Kim, Young Eun;Jung, Gooyoung;Park, Sung Kyeong;Kim, Tae Myoung;Choi, Ehn-Kyoung;Rhee, Man Hee;Kim, Yun-Bae
Journal of Ginseng Research
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제46권5호
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pp.683-689
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2022
Background: Since ginsenosides exert an anti-thrombotic activity, blood flow-improving effects of DK-MGAR101, an extract of mountain ginseng adventitious roots (MGAR) containing various ginsenosides, were investigated in comparison with an extract of Korean Red Ginseng (ERG). Methods: In Sprague-Dawley rats orally administered with DK-MGAR101 or ERG, oxidative carotid arterial thrombosis was induced with FeCl3 (35%), and their blood flow and occlusion time were measured. To elucidate underlying mechanisms, the cytoprotective activities on rat aortic endothelial cells (RAOECs) exposed to hydrogen peroxide (H2O2) were confirmed. In addition, the inhibitory activities of DK-MGAR101 and ERG on agonist-induced platelet aggregation, thromboxane B2 production, and ATP granule release from stimulated platelets as well as blood coagulation were analyzed. Results: DK-MGAR101 containing high concentrations of Rb1, Rg1, Rg3, Rg5, and Rk1 ginsenosides (55.07 mg/g) was more effective than ERG (ginsenosides 8.45 mg/g) in protecting RAOECs against H2O2 cytotoxicity. DK-MGAR101 was superior to ERG not only in suppressing platelet aggregation, thromboxane B2 production, and granule release, but also in delaying blood coagulation, FeCl3-induced arterial occlusion, and thrombus formation. Conclusions: The results indicate that DK-MGAR101 prevents blood vessel occlusion by suppressing platelet aggregation, thrombosis, and blood coagulation, in addition to endothelial cell injury.
Kim, Hee-Jin;Shin, Dong-Jin;Kim, Hye-Jin;Cho, Jinwoo;Kwon, Ji-Seon;Kim, Dongwook;Jung, Jong-Hyun;Jang, Aera
Animal Bioscience
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제35권12호
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pp.1957-1966
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2022
Objective: This study aimed to evaluate the difference in the thigh meat quality of Ross 308 broiler from conventional and welfare farms. Methods: Thigh meat samples of Ross 308 broilers (age, 35 d; carcass weight, 1.1 kg) from conventional farm (RCF, n = 60) and animal welfare farms (RAWF, n = 60) were analyzed. Proximate composition, pH, color (lightness, redness, and yellowness), water-holding capacity (WHC), shear force, total aerobic bacteria (TAB), and volatile basic nitrogen (VBN) were measured and the levels of bioactive compounds such as dipeptides (anserine and carnosine), creatine, creatinine, and their anti-oxidation activity were determined. Results: The RCF and RAWF did not differ significantly in their proximate composition, WHC, color, and creatine and carnosine levels. The pH value was significantly lower in RAWF than in RCF on day 7. The shear force value was significantly higher in RAWF than in RCF throughout the storage duration. TAB in RCF on day 9 were significantly higher than those in RAWF. The VBN content of RAWF was significantly lower than that of RCF after 5 days of storage. Creatinine content was significantly higher in RAWF (3.50 mg/100 g) than in RCF (3.08 mg/100 g) on day 1. Along with higher carnosine and anserine contents of RAWF, it had significantly higher 2,2-diphenyl-1-picrylhydrazyl and 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activities than those of RCF. Conclusion: These results imply that the animal welfare farming system beneficially affects the overall oxidative stability of Ross 308 thigh meat.
Objectives : The aim of this study was to investigate the effect of baicalein (BA) on the production of hydrogen peroxide and nitric oxide (NO) in RAW 264.7 mouse macrophages stimulated with polyinosinic-polycytidylic acid (poly-IC) and lipoteichoic acid. Methods : RAW 264.7 co-stimulated with poly-IC and lipoteichoic acid were incubated with baicalein at concentrations of 25 and 50 μM. Incubation time is 16 h, 18 h, 20 h, 22 h, and 24 h. After incubation, The production of hydrogen peroxide in RAW 264.7 was measured with dihydrorhodamine 123 assay. Chrysin was used as a comparative material. NO production was evaluated by griess assay. Results : For 16 h, 18 h, 20 h, 22 h, and 24 h incubation, BA at the concentration of 25 and 50 μM significantly inhibited the production of hydrogen peroxide in RAW 264.7 stimulated by poly-IC and lipoteichoic acid (p <0.001). In details, production of hydrogen peroxide in 'poly-IC and lipoteichoic acid'-stimulated RAW 264.7 treated for 16 h with BA at concentrations of 25 and 50 μM was 82.36% and 77.24% of the control group treated with poly-IC and lipoteichoic acid only, respectively; the production of hydrogen peroxide for 18 h was 83.15% and 77.91%, respectively;production of hydrogen peroxide for 20 h was 82.88% and 77.82%, respectively; production of hydrogen peroxide for 22 h was 83.27% and 78.17%, respectively; production of hydrogen peroxide for 24 h was 83.54% and 78.35%, respectively. Additionally, BA at the concentration of 50 and 100 μM significantly inhibited NO production in lipoteichoic acid-induced RAW 264.7 (p <0.001). Conclusions : BA might have anti-oxidative activity related to its inhibition of hydrogen peroxide production in 'poly-IC and lipoteichoic acid'-stimulated RAW 264.7 macrophages.
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