This study was conducted in order to investigate the association between hypertension and oxidative stress-related parameters and to evaluate these parameters in subclinical hypertensive patients and normotensive subjects living in Korea. We attempted to determine whether oxidative stress-related parameters would differ between two groups of 227 newly-diagnosed, untreated (systolic blood pressure (BP) ${\geq}$ 130 mmHg and diastolic BP ${\geq}$ 85 mmHg) and 130 normotensive subjects (systolic BP < 120 mmHg and diastolic BP < 80 mmHg). General characteristics of the subjects were collected using a simple questionnaire. From subjects' blood, degree of DNA damage in lymphocytes, the activities of erythrocyte superoxide dismutase, catalase, and glutathione peroxidase, level of plasma total radical-trapping antioxidant potential (TRAP), glutathione, and anti-oxidative vitamins, as well as plasma lipid profiles and conjugated diene (CD) were analyzed. Evaluation of the associations of oxidative stress-related parameters with blood pressure of the subjects was performed using Pearson partial correlation and multivariate logistic regression analysis after adjusting for confounding factors. Several oxidative stress-related parameters were higher in subclinical hypertensive patients than in normotensive subjects. Plasma levels of ${\alpha}$-tocopherol, ${\beta}$-carotene, TRAP, and activity of GSH-px were significantly lower in subclinical hypertensive patients than in normotensive subjects. Increased levels of DNA damage, lipid peroxidation, triglyceride, total cholesterol, and LDL-cholesterol were observed in subclinical hypertensive patients. These results confirm an association between blood pressure and oxidative stress-related parameters and suggest that the pathogenic role of oxidative stress in hypertension might be significant.
PARK Young-Beom;KIM In-Soo;YOO Sung-Jae;AHN Jong-Khan;LEE Tae-Gee;PARK Douck-Chon;KIM Seon-Bong
Korean Journal of Fisheries and Aquatic Sciences
/
v.31
no.4
/
pp.587-593
/
1998
To elucidate anti-tumor promoter from seaweed, the anti-tumor promoting activity of Ecklonia stolonifera, Undaria pinnatifida and Laminaria japonica extracts were determined by Epstein-Barr virus (EBV)-early antigen (EA) induction caused by a tumor promoter, teleocidin B-4. The methanol extracts of seaweed were subsequently fractionated with diethyl ether, distilled water, chloroform and ethyl acetate. Among the solvent fractions tested, chloroform and ethyl acetate fraction of E. stolonifera showed a high anti-tumor promoting activity at the levels of 88.0 and $85.9\%$ by the addition of 20 ${\mu}g/m{\ell}$, respectively. To characterize anti-tumor promoters from solvent fractions of E. stolonifera, the effects of phenols, chlorophyll derivatives and carotenoids on the anti-tumor promoting activity were investigated. Phenols, such as bromophenol and phloroglucinol showed anti-tumor promoting activity of $57\~66\%$ at 20 ${\mu}g/m{\ell}$. Pigments, such as chlorophylls and carotenoids exerted high anti-tumor promoting activities. Chlorophyll a and pheophorbide a exhibited the activity of $77.4\%$ and $66.6\%$ at 5${\mu}M/m{\ell}$, respectively. The active compounds of carotenoids were tentatively identified as lutein and $\alpha-cryptoxanthin$ from the profiles of visible spectra and R_f value of their authentic compounds, and showed anti-tumor promoting activities of $76.9\%$ and $84.4\%$ at dose of 20 ${\mu}g/m{\ell}$, respectively.
lt is well known that some kinds of leaves contain a lot of antioxidants in them; however, little attention has been given to the study on the amount of antioxidants in them and the changes in the amount of antioxidants in them during their growth. Therefore, we examined the antioxidants in the leaves of persimon, moraceae, and trifoliage orange during their growth. The amount of total polyphenol tended to decrease during plants' growth, and each amount was 4.62 g/dried 100 g persimon leaf, 1.70 gloried 100 g moraceae leaf, and 0.91 g/dried 100 g trifoliage orange leaf in April. The amount of total polyphenol in persimon leaf was 2.7∼5.1 times higher than moraceae and trifoliage orange leaf. The amount of ascorbic acid also decreased during plants' growth, and each amount was 2.7∼6.0 mg/dried 100 g moraceae leaf, 5.3∼9.9 mg/dried 100 g persimon leaf, and 3.7∼6.9 mg/dried 100 g trifoliage orange leaf. Persimon leaf was found to contain higher amount of ascorbic acid than moraceae leaf or trifoliage orange leaf. The amount of glutathione tended to decrease during plants' growth, and each average amount was 35.7 mg/dried 100 g trifoliage orange leaf, 15.8 mg/dried 100 g moraceae leaf, and 2.3 mg/dried 100 g persimon leaf. Trifoliage orange leaf contained the highest amount of glutathione. $\beta$ -Carotene tended to increase during the growth, and each amount was 411.2 mg/dried 100 g moraceae leaf, 198.5 mg/dried 100 g persimon leaf, 144.1 mg/dried 100 g trifoliage orange leaf in September. $\alpha$ -Tocopherol also tended to increase during the growth, and each amount was 52.8 mg/dried 100 g trifoliage orange leaf, 48.6 mg/dried 100 g moraceae leaf, and 61.7 mg/dried 100 g persimon leaf in September.
Kim, Jeong-Ho;Cho, Hyun-Dong;Won, Yeong-Seon;Park, Wool-Lim;Lee, Kwan-Woo;Kim, Hyuk-Joo;Seo, Kwon-Il
Journal of Life Science
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v.28
no.11
/
pp.1369-1378
/
2018
Prunus mume Siebold & Zucc., a member of the Rosaceae family (called Maesil in Korea), has been widely distributed in East Asia, e.g. Korea, Japan and China, and its fruit has been used as a traditional drug and health food. In this study, we evaluated physicochemical properties and physiological activities of condensed Prunus mume juice treated with pectinase (PJ). The values of total acidity, pH, sugar contents, turbidity moisture content of the PJ were 35.81%, 2.73, $54.36^{\circ}Brix$, 2.75 and 51.32%, respectively. The PJ had effective DPPH radical scavenging activity, reducing power effect, $H_2O_2$ scavenging activity and ${\beta}$-carotene bleaching effect. DPPH radical scavenging activities of PJ was 46.31%; their reducing power ($OD_{700}$) was 1.80; $H_2O_2$ scavenging activity of PJ was 91.62%; and ${\beta}$-carotene bleaching effect of PJ was 73.02%. Also, PJ showed effective levels of ${\alpha}$-glucosidase inhibition activity. The cell viability was measured by SRB assay. The PJ significantly decreased the cell viability of mouse melanoma cells (B16) and human melanoma cells (SK-MEL-2 and SK-MEL-28) in a dose-dependent manner, however, there was no effect on human keratinocyte HaCaT. In morphological study, PJ-treated SK-MEL-2 cells showed distorted and shrunken cell masses. Total polyphenol contents and total flavonoid contents of PJ were 588.31 mg% (gallic acid equivalent) and 860.45 mg% (rutin equivalent). The antiproliferative effect of PJ seems to be associated with the antioxidant activity of its flavonoid and polyphenol contents. In conclusion, PJ may be beneficial in development of a functional food material.
Kim, Jeung-Hoan;Lee, Soo-Yeon;Kwon, O-Jun;Park, Joo-Hoon;Lee, Jin-Young
Journal of Life Science
/
v.23
no.5
/
pp.616-621
/
2013
Aconitum pesudo-laeve var erectum has been known to possess anti-inflammatory activity and modulate the intestinal immune system. In addition, it has traditionally been used for the treatment of water retention in the body. In this study, the anti-aging and anti-diabetes effects of water and ethanol extracts from Aconitum pesudo-laeve var. erectum were investigated. The activities of each extract were measured by antioxidant tests such as DPPH and ABTS radical scavenging activity, antioxidant protection factor (PF), TBARs content, and ${\alpha}$-amylase and ${\alpha}$-glucosidase inhibition activity assay. DPPH radical scavenging activity was found in over 50% of water and ethanol extracts at $100{\mu}g/ml$, $50{\mu}g/ml$, respectively. The ABTS radical scavenging activity of ethanol extract was $99.8{\pm}0.1$% at $1,000{\mu}g/ml$ in water, which was highest among the ethanol extract concentrations. PFs measured with ${\beta}$-carotene-linoleate model systems were in the order of ethanol (1.49 PF at $1,000{\mu}g/ml$) > ethanol (1.40 PF at $500{\mu}g/ml$) > water (1.33 PF at $1,000{\mu}g/ml$) > water (1.27 PF at $500{\mu}g/ml$). TBARs content in ethanol extracts ($1,000{\mu}g/ml$) was $0.16{\pm}0.03{\mu}M$, which was lower than that of water extracts and other ethanol extract concentrations. The extracts also showed over 90% of ${\alpha}$-amylase inhibition and over 60% of ${\alpha}$-glucosidase inhibition ratio in water ($1,000{\mu}g/ml$) and ethanol extracts (100~$1,000{\mu}g/ml$). These results suggest that Aconitum pesudo-laeve var. erectum extracts could be used as a cosmetic source and preventive agent for aging and diabetes.
Jin, Dong Eun;Park, Seon Kyeong;Park, Chang Hyeon;Seung, Tae Wan;Choi, Sung-Gil;Heo, Ho Jin
Korean Journal of Food Science and Technology
/
v.47
no.1
/
pp.37-43
/
2015
Nutritional composition and in vitro antioxidant activities of the ethanol extract of Korean traditional actinidia (Actinidia arguta) sprouts of the Otumsense variety were investigated to examine the sproutsi nutritional value. The most abundant mineral, amino acid, and fatty acid were calcium, glutamic acid, and ${\alpha}$-linolenic acid, respectively. The major free sugar of Otumsense sprouts was sucrose. The level of vitamin C, a natural antioxidant, was highest among other vitamins examined. The amount of total polyphenol was highest in the 40% ethanol extract. The 2,2'-azino-bis(3-ethylbenzo-thiazoline-6-sulphonic acid) radical scavenging activity of the 40% ethanol extract was about 94% at a concentration of $1,000{\mu}g/mL$. Malondialdehyde inhibition by the extract increased in a dose-dependent manner (from 0 to $100{\mu}g/mL$). Intracellular reactive oxygen species accumulation resulting from $H_2O_2$ treatment of PC12 cells significantly reduced when the 40% ethanol extract was present in the media compared to that in PC12 cells treated with $H_2O_2$ only.
Serum levels of antioxidant vitamins and lipids were determined along with anthropometric measurements in 174 healthy male subjects with mean age of 50.3$\pm$6.8 years from Taegu area in Korea. Body mass index (BMI) and waist/hip(W/H) ratio of the subjects were 23.18$\pm$2.46 and 0.88$\pm$0.04, respectively and their systolic and distolic blood pressures were 127.8$\pm$15.5 and 83.9$\pm$10.8mmHg. Twenty one percent of the subject had BMI over 25. Average seum levels of total cholesterol, LDL- and HDL-cholesterol and triglyceride were 187.7$\pm$34.9, 117.6$\pm$33.5, 41.1$\pm$9.0 and 140.7$\pm$83.6mg/dl, respectively. Sixteen percent of the subject had LDL-chole-sterol over 130mg/dl. Serum level of lipid peroxide measured as thiobarbituric acid reactive substances(TBARS) of the subject was 2.01$\pm$0.77 MDA nmoles/ml and those of $\alpha$-tocopherol, retinol. ascorbic acid and sum of $\alpha$- and $\beta$-carotene were 9.59$\pm$3.11$\mu\textrm{g}$/ml, 1.15$\pm$ 0.38$\mu\textrm{g}$/ml, 10.5$\pm$3.8$\mu\textrm{g}$/ml and 64.6$\pm$43.$\mu\textrm{g}$/dl, respectively. About 14% of the sujects had low vitamin E status of less than 7.0$\mu\textrm{g}$/ml,. while 6% had low vitamin C status of less than 4.0$\mu\textrm{g}$/ml, Serum vitamin E showed positive correlations with total cholesterol and LDL-cholesterol and triglyceride, but no correlation with TBARS. Fatty acids of serum total lipid were composed of 42.9% as saturnted. 19.3% as monounsaturated and 36.7% polyunsaturated fatty acids(PUFA). N-6 and n-3 PUFA were 27.7% and 8.3% of total fatty acids. N-6/n-3 PUFA ratios were negatively correlated both with serum total cholesterol and TBARS.
Kim, Dong-Hyun;Choi, Hyun-Kyung;Cho, Seok-Cheol;Kook, Moo-Chang;Park, Chang-Seo
Journal of the Society of Cosmetic Scientists of Korea
/
v.34
no.3
/
pp.225-231
/
2008
It is known that Spirulina extracts have strong antioxidant activities since it contains diverse antioxidants such as phycocyanian, ${\beta}$-carotene, vitamin E and other carotenoids. In order to enhance antioxidant activity of Spirulina, Spirulina extracts were fermented by Lactobacillus plantarum P23 and Bacillus subtilis TP6. The resulting fermented supernatants were analyzed for their antioxidant activities by DPPH (1,1-diphenyl-2-picrylhydiazyl) method. The results indicated that fermentation process significantly enhanced total antioxidant activities. Increased levels of UV-induced TNF-${\alpha}$ and IL-6 were reduced back to normal level even by treatment of all three of the Spirulina extracts. The result suggested that the fermentation process enhanced the anti-inflammatory activities at least ten times higher than the simple extract. Zymography is used to determine the expression of UV-induced MMP. Spirulina extracts fermented by Bacillus subtilis TP6 were found to suppressed the expression of MMPs. Also treatment with the fermented Spirulina extracts resulted in an increase of collagen synthesis in vitro. In conclusion, the fermented Spirulina extracts are expected to be used as anti-aging cosmeceuticals.
Kim, Ji-Sun;Ahn, Ji-Yun;Ha, Tae-Youl;Rhee, Han-Cheol;Kim, Sun-A
Korean Journal of Food Science and Technology
/
v.43
no.5
/
pp.564-569
/
2011
This study qualitatively and quantitatively analyzed various carotenoids, L-ascorbic acid, and tocopherol and their anti-oxidant properties from four varieties (Special, Chelsea, Cupra, and Fiesta) and three different color stages [green (GP), yellow (YP) and red (RP)] of paprika harvested in Korea. Seven carotenoids were identified, mainly lutein in GP (Special: 4.65${\pm}$0.84 mg/kg fresh weight (fw)) and YP (Fiesta: 5.19${\pm}$0.05 mg/kg fw), and capsorubin (3.16${\pm}$0.35 mg/kg fw) and capsanthin (53.70${\pm}$6.23 mg/kg fw) in Special of RP. RP was the highest in total carotenoids, L-ascorbic acid, and ${\alpha}$-tocopherol contents, while GP was the highest in ${\gamma}$-tocopherol content. RP showed the strongest antioxidant activity ($IC_{50}$=62.40${\pm}$0.03 ${\mu}g/mL$ in an ABTS assay and 182.77${\pm}$31.74 ${\mu}g/mL$ in a DPPH assay). Paprika in different color stages has many phytochemicals even though they have different kinds of carotenoids. Therefore, dietary intake of paprika may be helpful for improving human health.
Antioxidant vitamin supplementation focuses one's attention on the prevention of age-related diseases. This study was conducted to investigate the antioxidant status and lipid profiles and to look into the antioxidant vitamin supplementation that affects lipid metabolism in 20 elderly non-smoking Korean women (placebo group: n = 6, vitC suppl: n = 7, vitE suppl: n = 7). Age, height, weight, muscle, percent of fat and WHR were not significantly different among the groups, however $\%$ of fat was above $33\%$ and WHR was above 0.9. And blood pressure of the placebo group was 131.7/81.7 (border line hypertension), that of vitamin C supplement was 141.4/87.1 (hypertension) and that of vitamin E supplement was 151.4/92.9 (hypertension). Although nutrient intakes of all groups were poor, antioxidant status (blood vitamins C, E, A, and beta-carotene) and lipid profile (TG, total-cholesterol, VLDL-cholesterol, LDL-cholesterol, HDL-cholesterol) were normal. For nutritional intervention, the vitamin C supplement group received L-ascorbic acid 1,000 mg, and vitamin E supplement group received d-alpha-tocopherol 400IU for 4 weeks, showing the effects of vitamin E supplementation. Response total cholesterol of HDL-cholesterol (T-Chol/HDL) in vitamin E supplement group was significantly decreased from 4.3 to 3.2. And response LDL-cholesterol of HDL-cholesterol (LDL/HDL) in the vitamin E supplement group was also significantly decreased from 2.6 to 1.7. In addition, after the adjustment for plasma lipids (TG, total cholesterol), plasma vitamin A levels in vitamin E supplement group were significantly increased from 7.89 mg/g to 14.91 mg/g. And systolic blood pressure in vitamin E supplement group was significantly reduced. These results suggested that vitamin E supplementation affects the lipid profiles and blood pressure in elderly non-smoking women. So various nutrition programs must be implemented against age-related diseases and further studies are needed regarding sorts and amounts of antioxidant nutrients and supplementation periods.
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