• The Journal of Internal Korean Medicine
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• v.19 no.2
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• pp.381-391
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• 1998

The present study was done to investigate the effects of Bombusae concretio Salicea (BCS) on cultured astrocyte cell system and lipid peroxidation in $A{\beta}25-35$ treatment conditions. Cell killing was significantly enhanced by addition of increasing concentrations of $A{\beta}25-35$. Pretreatment of BCS attenuated in cell killing enhanced by increasing concentrations of $A{\beta}25-35$. MDA level induced by $A{\beta}25-35$ treatment was significantly increased and the level was slightly reduced by pretreatment of BCS. The present study showed that $A{\beta}25-35$ strongly increased MDA level and the level was enhanced by addition of increasing concentrations of In conclusion, it was shown that $A{\beta}25-35$ is not only potent lipid peroxide inducer, but also cause protection of neurodegeneration induced by $A{\beta}25-35$. It can be concluded that the activation of antioxidative enzymes may be related to the inhibition of lipid peroxidative reactions. We cannot fully explain to effects of BCS at present; however, the ability of BCS to reduce cell killing and MDA level induced by $A{\beta}25-35$ suggest that BCS may be a protective agent for free radical generating compounds such as $A{\beta}25-35$.

• Food Science and Preservation
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• v.22 no.5
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• pp.751-757
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• 2015

The objective of this study was to investigate the protective effects of mulberry (Morus alba) sugar extracts (MSE) against $H_2O_2$-induced oxidative stress in HepG2 cells. The MSEs was mixed with matured mulberry and sugar at the same ratio (1:1, w/w) and stored at $18{\pm}3^{\circ}C$ for 40 days. In 2,2-diphenyl-1-picryl-hydrazyl (DPPH) radical scavenging test, MSE stored for 40 days showed high activity with a ratio above 66%. Therefore, we selected 40 days as the optimum storage period. After cell viability analysis using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, we determined that the optimum concentration of MSE was 0.5%. Our results showed that MSE increased the cell viability and antioxidant enzyme activities of superoxide dismutase (SOD) and catalase in $H_2O_2$-treated HepG2 cells. Moreover, the treatment with MSE inhibited malondialdehyde (MDA) levels in $H_2O_2$-treated HepG2 cells. We also observed a reduction in apoptotic bodies in the Hoechst staining. These data show that MSE treatment significantly suppressed caspase-3 activity in HepG2 cells expored to $H_2O_2$-induced oxidative stress, thereby indicationg the protective effects of MSE in $H_2O_2$-induced oxidative stress.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.1
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• pp.60-66
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• 2014

The aim of this study was to evaluate the antioxidant activity and protective effect of extracts from the stems and leaves of Chrysanthemum boreale (CBSL) on t-BHP induced oxidative stress in human liver cells (Chang cells). Antioxidant activities in the extracts were determined for various radical scavenging activities including ferric reducing antioxidant power, 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activity, and oxygen radical absorbance capacity (ORAC). CBSL showed a very good scavenging effect of DPPH radical ($IC_{50}$ $0.009{\pm}0.002$ mg/mL), alkyl radical ($IC_{50}$ $0.004{\pm}0.001$ mg/mL), and hydroxyl radical ($IC_{50}$ $6.742{\pm}0.152$ mg/mL). CBSL also showed a strong antioxidant effect in the ORAC assay. In the MTT assay on human liver cells (Chang cells), the extracts showed protective effects by increasing cell viability, decreasing ROS, and restoring mitochondria membrane potential upon t-BHP induced oxidative stress. Our findings suggest that CBSL extracts are a potential therapeutic with protective antioxidant effects upon oxidative stress.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.32 no.4 s.59
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• pp.263-267
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• 2006

Antioxidative and anti-inflammatory activities of Petasites japonicus extract were evaluated. P. japonicus extract showed 70.1% inhibition on peroxidation of linoleic acid. In the experiment using the cell permeable dye, 2',7'- dichlorofluorescein diacetate (DCFDA) as an indicator of reactive oxygen species (ROS) generation, intracellular oxidative stress in UVB-irradiated keratinocytes was shown to be decreased by P. japonicus extract. Also, UVB-induced production of interleukin-$1{\alpha}$ and prostaglandin $E_2$ in human HaCaT keratinocytes was reduced in a dose-dependent manner by treatment with P. japonicus extract. All these results suggest that P. japonicus extract can be effectively used for prevention of UV-induced adverse skin reactions such as radical production and inflammation.

• Applied Chemistry for Engineering
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• v.26 no.2
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• pp.165-172
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• 2015

Quercetin and its glycoside, rutin, are flavonoids, which are well known as natural antioxidants. In this study, cationic liposomes loaded with flavonoids (quercetin or rutin) were investigated for their effects on cell and skin permeability, and protective effects against UVA. The particle size of the empty cationic liposomes was in the range of 100~130 nm, and the zeta potential was + 33.05 mV. The entrapment efficiency of 0.5R/CL was higher than that of 0.5 Q/CL. The cellular uptake of the cationic liposomes was five-fold higher than that of liposomes. The skin permeability of quercetin and rutin was investigated using Franz diffusion cells. Compared to the initial loading dose, the amount of quercetin or rutin delivered to the skin by cationic liposomes was higher than that delivered by conventional liposomes or phosphate-buffered saline. From the protective effect of cationic liposomes against UVA ($25J/cm^2$), we found that the cell viability in cationic liposomes containing flavonoids was higher than that of using UVA irradiation only. These results indicate that cationic liposomes provide enhanced delivery of flavonoids (quercetin and rutin) into the skin and may be used for antiaging and antioxidant cosmetics.

• Journal of the Korean Applied Science and Technology
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• v.34 no.2
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• pp.296-304
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• 2017

The purpose of this study was to investigate the applicability of the Psidium guajava leaf extract as a whitening functional cosmetic material. We measured DPPH radical scavenging activity, intracellular ROS, cytotoxicity in B16F10 melanoma cells and cytoprotective effect on ultraviolet A, in vitro tyrosinase inhibitory effect and melanin biosynthesis inhibitory effect. The antioxidative effect was confirmed through high DPPH radical scavenging activity and intracellular ROS activity inhibition measurement of the Psidium guajava leaf extract. The survival rate of B16F10 melanoma cells was more than 98% at all concentrations, and the cytoprotective effect from ultraviolet ray A was found to increase in a concentration-dependent manner. In addition, in vitro tyrosinase activity inhibitory effect of 10% and melanin biosynthesis inhibitory effect of 20% were observed. Through less toxicity for B16F10 melanoma cell, high antioxidant activity, inhibition of tyrosinase activity and melanin biosynthesis inhibitory effect, we confirmed the possibility of developing the Psidium guajava leaf extract as a whitening functional cosmetic material with a safe and excellent whitening effect.

• Journal of the Korean Society of Food Science and Nutrition
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• v.43 no.11
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• pp.1674-1680
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• 2014

The aim of this study was to investigate the protective effects of methanolic extracts of cooked mixed grain rice samples, including grain rice (sorghum, black bean, proso millet, and Job's tears) mixed with fermented brown rice (GR), GR added with 0.5% water extract of Sanghwang mushroom (GRS) or 0.1% curry (GRK), and traditional five grain mixed rice (TMR, Ohgokbap), on $H_2O_2$-induced oxidative injury in LLC-PK1 pig renal epithelial cells. White rice (WR) was used as a positive control. Cells were first exposed to $H_2O_2$ ($250{\mu}M$) for 4 hr, followed by treatment with $100{\mu}g/mL$ of different GR extracts for 24 hr. $H_2O_2$ significantly induced cell damage (P<0.05). Cellular levels of reactive oxygen species (ROS), lipid peroxidation, and antioxidant enzymes, including catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH-px), were measured. In addition, mRNA levels of antioxidant enzymes were determined by RT-PCR assay. Mixed grain rice, particularly GRS and GRK, were able to reduce cellular levels of ROS, decrease lipid peroxidation, and also increase mRNA expression of antioxidant enzymes compared to other samples. These results suggest that mixed grain rice, specifically GRS and GRK, have strong protective effects against $H_2O_2$-induced oxidative injury in LLC-PK1 cells through inhibition of lipid peroxidation, reduction of ROS levels, and elevation of antioxidant enzyme activities.

• Korean Journal of Food Science and Technology
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• v.46 no.5
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• pp.609-615
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• 2014

The cytoprotective effect of Moringa oleifera Lam. (drumstick tree) on neuronal cells was investigated to confirm the physiological benefits associated with this natural food resource. First, the drumstick tree extract was chemically analyzed to determine inherent nutritional constituents. Calcium and potassium were identified as the major mineral constituents, and palmitic acid (C16:0, 16.33%) and gadoleic acid (C20:01, 66.34%) were detected as the major fatty acids. Moreover, drumstick tree extract contained 94.78 mg/100 g vitamin E and 112.61 mg/100 g niacin. PC12 cells were used to study the cytoprotective effects of drumstick tree extract. Intracellular accumulation of reactive oxygen species was significantly reduced when $H_2O_2$ treated-neuronal cells were cultured in a medium containing the methanolic extract of drumstick tree, compared to cells treated with only $H_2O_2$. Cell viability assay using MTT showed that the extract protected cells against $H_2O_2$-induced neurotoxicity and inhibited LDH leakage from the cell membrane. Caspase assay showed that the extract exerted cytoprotective effect against apoptosis. Consequently, these data suggest that drumstick tree is a useful natural resource with positive effects on human health.

• Journal of Acupuncture Research
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• v.27 no.3
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• pp.105-116
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• 2010

목적 : 이 연구는 MPTP 유발 파킨슨병 동물 모델에서 봉독약침의 신경보호 효과 및 항염증 효과를 확인하기 위해 시행되었다. 방법 : C57BL/6 mice에 신경독소인 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine(MPTP)를 하루에 2시간 간격으로 MPTP-HCl(20mg/kg per dose)을 4번 복강 내 주입하여 중뇌 흑질의 도파민 신경세포를 파괴한 파킨슨병 동물 모델을 유발하였다. 실험군은 MPTP군, MPTP 현종 BVA군, MPTP 곡지 BVA군, MPTP 신수 BVA군의 4군으로 하였다. 마지막 MPTP 투여 2시간 후에 1차로 봉독약침을 시술하고, 그 후 48시간 간격으로 총 5차 연속 시술하였다. 봉독약침액의 농도는 0.2mg/Kg으로 하였고, 경혈은 양측 현종($GB_{39}$), 곡지($LI_{11}$), 신수($BL_{23}$)를 사용했고, 주입량은 각 경혈당 양측으로 각 $20{\mu\ell}$씩 주입하였다. 항염증작용을 알아보기 위해 TH, MAC-1, iNOS HSP70을, 세포사멸에 대한 신경세포의 보호효과를 알아보기 위해 caspase-3을 면역조직화학법을 사용하여 실시하였다. 결과 : 실험 결과 MPTP 유발 파킨슨병 동물 모델에서 현종 곡지 신수혈에 대한 봉독약침은 TH-Immunoreactivity neuron의 감소와 microglial activation을 억제하였다. 봉독약침군 모두 효과를 보였으나 그 중 현종과 신수혈에서 특히 억제작용이 컸다. MAC-1에서는 현종혈이 억제작용이 컸다. HSP70-IR neuron은 곡지에서 유의한 억제작용을 보였으나, iNOS neuron은 모든 군에서 유의한 차이를 보이지 않았다. 또한 세포사멸억제여부 실험에서 봉독약침은 모두 억제작용을 보였으나 특히 곡지자침군에서 caspase-3 발현을 유의하게 억제하였다. 결론 : 이러한 결과는 봉독약침이 MPTP 투여로 인한 중뇌 흑질의 염증에 의한 도파민 신경세포 손상을, 염증을 억제함으로써 항염 효과를 나타냄을 알 수 있으며, 신경세포를 보호하는 활성이 있음을 보여줌과 동시에 세포사멸을 억제하는 활성이 있다고 사료된다.

• Journal of the Korean Applied Science and Technology
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• v.36 no.4
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• pp.1303-1311
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• 2019

This study was to investigate the antioxidant, anti-inflammatory and neuronal cell protective effects of Poria cocos Wolf and Corni fructus extracted by water and 70% ethanol. Total polyphenol content in water extract of Poria cocos Wolf was significantly higher than those of other extracts. DPPH and ABTS free radical scavenging activity in water extract of Corni fructus was higher than those of other extracts. DPPH and ABTS free radical scavenging activity were increased in a dose-dependent manners. In order to effectively extract total polyphenol contents and anti-oxidant components in Poria cocos Wolf and Corni fructus, hot water extraction method is more efficient than ethanol extraction method. Poria cocos extracts were found to be a superior NO production inhibitory effect compared to Corni fructus extracts. In a neuronal cell viability assay using MPP⁺, the water extract of Poria cocos Wolf protected against MPP⁺-induced neurotoxicity than those of Corni fructus extract. It is considered to be a potential functional material with antioxidant, anti-inflammatory and neuronal protective effect against to oxidative stress according to the extract methods of extracting Poria cocos Wolf and Corni fructus.