Ann, Xiao-Hua;Lun, Yong-Zhi;Zhang, Wei;Liu, Ben;Li, Xing-Yun;Zhong, Min-Tao;Wang, Xiao-Li;Cao, Jing;Ning, An-Hong;Huang, Min
Asian Pacific Journal of Cancer Prevention
/
v.15
no.12
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pp.5055-5061
/
2014
In this study, an anti-oxidant and anti-tumor protein Latcripin-3 of Lentinula edodes C91-3 was expressed in Escherichia coli. for the first time. According to the cDNA library, the full-length gene of Latcripin-3 was cloned by the methods of 3'-full rapid amplification of cDNA Ends (RACE) and 5'-full RACE. The structural domain gene of Latcripin-3 was inserted into the pET32 a(+). The functional protein of Latcripin-3 was expressed in Rosetta-gami (DE3) E. coli, evaluated by Western blotting and mass spectrometry. DPPH testing showed that the protein Latcripin-3 can scavenge free radicals remarkably well. The activity of functional protein Latcripin-3 on A549 cells was studied with flow cytometry and the MTT method. The MTT assay results showed that there was a decreases in cell viability in a dose-dependent and time-dependent manner in protein Latcripin-3 treated groups. Flow cytometry demonstrated that Latcripin-3 can induce apoptosis and block S phase dramatically in human A549 lung cancer cells as compared to the control group. At the same time, the cell ultrastructure observed by transmission electron microscopy supported the results of flow cytometry. This research offers new insights and advantages for identifying anti-oxidant and anti-tumor proteins.
Jung Myung Sun;Kang Kyoung Ah;Zhang Rui;Chae Sungwook;Yoo Byoung-Sam;Yang Young Taek;Lee Nam Ho;Park Jae Woo;Hyun Jin Won
Toxicological Research
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v.21
no.4
/
pp.279-284
/
2005
We have screened the cytoprotective effect against $H_2O_2$ and $\gamma-ray$ radiation induced oxidative stress from 32 Korean plants. Betula ermani var.saitoana (caulis, leaves), Rosa wichuraiana (caulis), Sorbus commixta (caulis), Weigela florida (leaves), Cirsium rhinoceros (whole plant), and Viburnum erosum (caulis) were found to scavenge 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical and intracellular reactive oxygen species (ROS). As a result, extracts of six plants reduced cell death of Chinese hamster lung fibroblast (V79-4) cells induced by $H_2O_2$ treatment. In addition, these extracts protected cell death of V79-4 cells damaged by $\gamma-ray$ radiation. In addition, these extracts scavenged ROS generated by radiation. Taken together, the results suggest that Betula ermani var. saitoana, Rosa wichuraiana, Sorbus commixta, Weigela florida, Cirsium rhinoceros, and Vibumum erosum protect V79-4 cells against oxidative damage by radiation through scavenging ROS.
Journal of Physiology & Pathology in Korean Medicine
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v.21
no.6
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pp.1499-1505
/
2007
Peroxynitrite ($ONOO^-$) is a reactive oxidant formed from superoxide anion radical (${\cdot}\;O_2-$) and nitric oxide (NO), which can oxidize cellular components such as essential protein, non-protein thiols, DNA, low-density lipoproteins and membrane phospholipids. ${\cdot}\;O_2-$ and $ONOO^-$ have contributed to the pathogenesis of diseases such as stroke, heart disease, Alzheimer's disease and atherosclerosis. Because of damaging effects of ${\cdot}\;O_2-$ and $ONOO^-$ oxidants, Vespae Nidus, which has been known to strengthen the kidneys to preserve the vital energy. was tested as a potential specific scavenger of those oxidants. In this study, the viability of Vespae Nidus (1, 10, 50 g/ml) to scavenge ${\cdot}\;O_2-$, NO, $ONOO^-$ and so to protect cells against tert-butylhydroxyperoxide (t-BHP) induced cell death was tested. The levels of ${\cdot}\;O_2-$ and $ONOO^-$ were detected by staining with DCFH-DA and DHR 123, respectively. Protein expression levels of COX-2, iNOS and $NF{-\kappa}B$ were assayed by western blot. Vespae Nidus blocked t-BHP-induced cell death in a dose-dependent fashion. Vespae Nidus inhibited t-BHP-induced production of ${\cdot}\;O_2-$, NO and $ONOO^-$ in YPEN cells. The lipid peroxide level was increased and glutathione level was decreased in lipopolysaccharide (LPS)-treated ICR mouse, whereas the ones in the Vespae Nidus-administered group were regulated beneficially. Vespae Nidus inhibited the expression of COX-2, iNOS and NF-κB (p65 and p50) genes in LPS-treated ICR mouse. The present study suggests that Vespae Nidus is a powerful antioxidant and promotes cellular defense activity by scavenging the toxic oxidants such as ${\cdot}\;O_2-$ and $ONOO^-$.
Min Jeong Kim;Nur Istianah;Bo Ram So;Hye Jee Kang;Min Jeong Woo;Su Jin Park;Hyun Jeong Kim;Young Hoon Jung;Sung Keun Jung
Journal of Microbiology and Biotechnology
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v.32
no.12
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pp.1589-1598
/
2022
Microfibrillated cellulose (MFC) is a valuable material with wide industrial applications, particularly for the food and cosmetics industries, owing to its excellent physiochemical properties. Here, we prepared high-solid microfibrillated cellulose (HMFC) from the centrifugation of Gelidium amansiiderived MFC right after fibrillation. Dispersion properties, morphology, and structural changes were monitored during processing. HMFC has a five-fold higher solid concentration than MFC without significant changes to dispersion properties. SEM images and FTIR spectra of HMFC revealed a stable surface and structure against centrifugal forces. HMFC exhibited 2,2'-azino-bis (3-ethylbenzothiazoline6-sulfonic acid) (ABTS) radical scavenging activity, although it could not scavenge 2,2-diphenyl-1- picrylhydrazyl (DPPH). Moreover, HMFC inhibited the generation of LPS-induced excessive nitrite and radial oxygen species in murine macrophage RAW264.7 cells. Additionally, HMFC suppressed LPS-induced Keap-1 expression in the cytosol but did not alter iNOS expression. HMFC also attenuated the UVB-induced phosphorylation of p38, c-Jun N-terminal kinase (JNK) 1/2, and extracellular-signal-regulated kinase (ERK) 1/2, as well as the phosphorylation of c-Jun in the immortalized human skin keratinocyte HaCaT cells. Therefore, the application of centrifugation is suitable for producing high-solid MFC as a candidate material for anti-inflammatory and antioxidative marine cosmeceuticals.
In the present study, we synthesized a series of novel 7-methoxy-N-(substituted phenyl)benzofuran-2-carboxamide derivatives in moderate to good yields and evaluated their neuroprotective and antioxidant activities using primary cultured rat cortical neuronal cells and in vitro cell-free bioassays. Based on our primary screening data with eighteen synthesized derivatives, nine compounds (1a, 1c, 1f, 1i, 1j, 1l, 1p, 1q and 1r) exhibiting considerable protection against the NMDA-induced excitotoxic neuronal cell damage at the concentration of $100{\mu}M$ were selected for further evaluation. Among the selected derivatives, compound 1f (with $-CH_3$ substitution at R2 position) exhibited the most potent and efficacious neuroprotective action against the NMDA-induced excitotoxicity. Its neuroprotective effect was almost comparable to that of memantine, a well-known NMDA antagonist, at $30{\mu}M$ concentration. In addition to 1f, compound 1j (with -OH substitution at R3 position) also showed marked anti-excitotoxic effects at both 100 and $300{\mu}M$ concentrations. These findings suggest that $-CH_3$ substitution at R2 position and, to a lesser degree, -OH substitution at R3 position may be important for exhibiting neuroprotective action against excitotoxic damage. Compound 1j was also found to scavenge 1,1-diphenyl-2-picrylhydrazyl radicals and inhibit in vitro lipid peroxidation in rat brain homogenate in moderate and appreciable degrees. Taken together, our structure-activity relationship studies suggest that the compound with $-CH_3$ substitution at R2 and -OH substitution at R3 positions of the benzofuran moiety might serve as the lead exhibiting potent anti-excitotoxic, ROS scavenging, and antioxidant activities. Further synthesis and evaluation will be necessary to confirm this possibility.
Several studies have shown that plant-derived polyphenols reduce cardiovascular accidents in high-risk patients and the inhibition of platelet function may be responsible for part of this benefit. Lindera obtusiloba is widely used in traditional herbal medicine for the treatment of cardiovascular and inflammatory diseases. Therefore, the antiplatelet and antithrombotic activities of Lindera obtusiloba Extracts (LOE) on in vitro platelet aggregation, radical scavenging activity and in vivo murine pulmonary thrombosis were examined. LOE was able to directly scavenge the stable DPPH radical in a concentration-dependent manner and its $IC_{50}$ value was 3.9 ${\pm}$ 0.1 ${\mu}g$/ml. LOE significantly inhibited collagen- and ADP-induced platelet aggregation in a concentration-dependent manner and its $IC_{50}$ value is 0.9 ${\pm}$ 0.1 mg/ml and 0.4 ${\pm}$ 0.1 mg/ml respectively. The inhibitory effect of LOE was comparable to aspirin ($IC_{50}$ values were 1.0 ${\pm}$ 0.5 and 1.0 ${\pm}$ 0.7 mg/ml, respectively). Furthermore, oral administration of LOE suppressed the death of mice with pulmonary thrombosis induced by intravenous injection of collagen plus epinephrine. Taken together, our results suggest LOE may be a promising candidate for antithrombotic agent, and the antithrombotic effect of LOE may be due to, at least in part, antiplatelet activity.
Journal of the Korean Society of Food Science and Nutrition
/
v.43
no.4
/
pp.530-536
/
2014
In this study, we investigated the quality and antioxidant activity of wet noodles fortified by adding brown rice and sorghum powders. Wet noodles were divided into four groups: WN-p (wheat flour 100%, purified salt 2%), WBN-b (wheat flour 80%, brown rice powder 20%, bamboo salt (${\times}1$) 2%), WBSN-b (wheat flour 80%, brown rice powder 10%, sorghum powder 10%, bamboo salt (${\times}1$) 2%), and WSN-b (wheat flour 80%, sorghum powder 20%, bamboo salt (${\times}1$) 2%). The wet noodles were evaluated for their quality characteristics and capacities to scavenge free radicals. The weight, volume, capacity to absorb water, and turbidity of cooked WBSN-b were close to those of cooked WN-p. Springiness, cohesiveness, and chewiness of cooked WBSN-b were the highest among all cooked noodles added with brown rice or sorghum powders and textural properties of cooked WBSN-b were not significantly different from WN-P. In the sensory evaluation, the overall acceptance of WBSN-b received the highest score of 6.4 points, which was higher than the score for WN-p. DPPH and hydroxyl radical scavenging activities increased significantly with addition of brown rice and sorghum powder, and radical scavenging activities of WBSN-b and WSN-b were the highest. In conclusion, wet noodles added with 10% brown rice powder, 10% sorghum powder, and 2% bamboo salt (${\times}1$) exhibited the same quality properties of WN-p. Addition of 10% brown rice powder, 10% sorghum powder, and 2% bamboo salt (${\times}1$) increased the sensory and antioxidant activities of wheat flour noodles.
Journal of the Korean Society of Food Science and Nutrition
/
v.32
no.5
/
pp.723-727
/
2003
The antioxidant activities and their antioxidant compounds of a group of teas obtained in local markets were investigated. A total of 18 teas were tested for their antioxidant activities based on their ability to scavenge ABTS (2,2'-Azino-bis-3-ethylbenzothiazoline-6-sulfonic acid) cation radical and DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical. The former was expressed as mg of ascorbic acid equivalents per 1 tea bag (L-ascorbic acid equivalent antioxidant capacity, AEAC) and the latter was expressed as percentage of electron donating activity (EDA%). A good correlation of AEAC and EDA was observed between the two methods. The concentrations of total polyphenolics and flavonoids in tea extracts were measured by spectrophotometric methods. Total ascorbic acid was determined via the 2,6-dicholoroindophenol titrimetric method. According to the AEAC value and EDA, black tea, brown rice green tea, green tea, herb tea and malva tea showed relatively high antioxidant activities. Polyphenolic compounds were the major naturally occurring antioxidant compounds found in teas and the high concentrations of polyphenolic compounds were observed in black tea, green tea and herb tea. Overall, six teas out of 18 teas tested in the study showed better antioxidant activities and higher amounts of total polyphenolic compounds.
BACKGROUND/OBJECTIVES: This study was performed to investigate the in vitro antioxidant and cytoprotective effects of fermented sesame sauce (FSeS) against hydrogen peroxide ($H_2O_2$)-induced oxidative damage in renal proximal tubule LLC-PK1 cells. MATERIALS/METHODS: 1,1-diphenyl-2-picrylhydrazyl (DPPH), hydroxyl radical ($^{\bullet}OH$), and $H_2O_2$ scavenging assay was used to evaluate the in vitro antioxidant activity of FSeS. To investigate the cytoprotective effect of FSeS against $H_2O_2$-induced oxidative damage in LLC-PK1 cells, the cellular levels of reactive oxygen species (ROS), lipid peroxidation, and endogenous antioxidant enzymes including catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH-px) were measured. RESULTS: The ability of FSeS to scavenge DPPH, $^{\bullet}OH$ and $H_2O_2$ was greater than that of FSS and AHSS. FSeS also significantly inhibited $H_2O_2$-induced ($500{\mu}M$) oxidative damage in the LLC-PK1 cells compared to FSS and AHSS (P < 0.05). Following treatment with $100{\mu}g/mL$ of FSeS and FSS to prevent $H_2O_2$-induced oxidation, cell viability increased from 56.7% (control) to 83.7% and 75.6%, respectively. However, AHSS was not able to reduce $H_2O_2$-induced cell damage (viability of the AHSS-treated cells was 54.6%). FSeS more effectively suppressed $H_2O_2$-induced ROS generation and lipid peroxidation compared to FSS and AHSS (P < 0.05). Compared to the other sauces, FSeS also significantly increased cellular CAT, SOD, and GSH-px activities and mRNA expression (P < 0.05). CONCULUSIONS: These results from the present study suggest that FSeS is an effective radical scavenger and protects against $H_2O_2$-induced oxidative damage in LLC-PK1 cells by reducing ROS levels, inhibiting lipid peroxidation, and stimulating antioxidant enzyme activity.
Ozone ($O_3$)-induced changes in chlorophyll content and specific activities of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), dehydroascorbate reductase (DHAR) and glutathione reductase (GR) were investigated in two rice cultivars (Oryza sativa L.) grown under variable nutrient treatments. For this study, two rice cultivars of Ilpumbyeo (IL) and Keumobyeo#l (KM), which were known as resistant and susceptible to $O_3$, respectively, were exposed to $O_3$at 0.15ppm for 30 days and investigated with 10 days interval. The available nutrient regimes were varied by doubling the supply of nitrogen (N), phosphorus (P) and potassium (K) Within a basic fertilizer status (N, P, K; 15, 12, 12kg/l0a$^{-1}$ ). In both cultivars and at all nutrient status, chlorophyll content in $O_3$-treated plants decreased with prolonged treatment period, although higher N, P and K supply with $O_3$ treatment alleviated the decrease in chlorophyll content. The activities of almost all enzymes investigated for this study were decreased during initial stages of $O_3$- exposure except GPX which maintained higher activity throughout the exposure period than the non-treated plant. However, the antioxidant enzymes in $O_3$-treated plants showed almost the same or higher activities on 30 days after $O_3$ - exposure. The most significant changes in activities were observed in GR of the $O_3$-treated leaves. With the prolonged treatment period, the activity of GR at 30 days was increased by 3-8 times compared to those in 10 days. Most of the investigated enzymes showed very similar tendency to $O_3$ treatment in all fertilizer status. There was no observed evidence for enhanced detoxification of $O_3$-derived activated oxygen species in plants grown under higher fertilizer status compared with that in plants grown under basic fertilizer status. The increase in the activities of SOD, APX and GR in rice leaves by relatively long-term treatment with $O_3$ at low concentration is considered to indicate that the plant became adapted to the $O_3$ stress and the protection system increased its capacity to scavenge toxic oxygen species. Our results in two rice cultivars indicated that there was little difference in the activities of antioxidant enzymes between IL and KM, which were known as resistant and susceptible cultivar to $O_3$
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