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Kang Y.M.,Marine Bioprocess Co. | Lee B.-J.,Marine Bioprocess Co. | Kim J.I.,Dong - A University | Nam B.-H.,Marine Bio Industry Development Center | And 5 more authors.
Food Science and Biotechnology | Year: 2014

A randomized, double-blind, placebo-controlled study of fermented sea tangle (FST) was conducted using 48 healthy volunteers with high levels of γ-glutamyltransferase (GGT). Participants (n=48) were divided into a placebo group and a FST group, which consumed FST (1.5 g/day) for 4 weeks. Serum GGT, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH) levels were determined. Plasma 8-isoprostane, 8-hydroxydeoxyguanosine (8-OHdG), and protein carbonyl contents, which indicate lipid peroxidation, DNA damage, and oxidation of protein, were determined. Decreased serum GGT was found in FST consumption group, compared to the placebo group [mean values (IU/L): 78.71±19.14 and 116.75±38.55, respectively, p<0.001]. Administration of FST significantly (p<0.05) decreased levels of serum AST [mean values (IU/L): 31.08±7.25 and 26.79±6.53 respectively, p<0.001] and ALT [mean values (IU/L): 42.63±18.99 and 31.83±14.21, respectively, p=0.001], compared to the placebo group, and significantly (p<0.05) decreased concentrations of plasma 8-isoprostane, 8-OHdG, and protein carbonyl levels. © 2014 The Korean Society of Food Science and Technology and Springer Science+Business Media Dordrecht. Source

Jeong M.-H.,Dong - A University | Yang K.-M.,Korea Institute of Radiological and Medical Sciences | Kim J.-K.,Korea Institute of Radiological and Medical Sciences | Nam B.-H.,Marine Bio Industry Development Center | And 4 more authors.
International Journal of Molecular Medicine | Year: 2013

The control of melanogenesis is an important strategy in the treatment of abnormal skin pigmentation for cosmetic purposes. The aim of the present study was to investigate the anti-melanogenic effect of Asterina pectinifera (A. pectinifera) extracts by cell-free mushroom tyrosinase assay, cellular tyrosinase assay, melanin content assay and the analysis of related protein expression in melan-a cells. A. pectinifera was extracted with 80% methanol (80-MAP) and further fractionated with hexane (He-AP) and ethyl acetate (EA-AP). In addition, the enzyme extract (En-AP) of A. pectinifera, to which protease was added, was processed. EA-AP and En-AP among A. pectinifera extracts showed strong inhibitory activity against the cell-free mushroom tyrosinase activity. EA-AP and En-AP induced significant inhibition of melanin production and cellular tyrosinase activity. In the action of EA-AP and En-AP on melanogenesis, they reduced the expression of melanogenic genes and proteins including tyrosinase, tyrosinase-related protein-1 (TRP-1) and dopachrome tautomerase (Dct). These results showed that EA-AP and En-AP inhibited melanogenesis by reducing tyrosinase activity and melanin production via subsequent downregulation of tyrosinase-related proteins. The overall results suggest that EA-AP and En-AP among A. pectinifera extracts may be promising candidates for the treatment of hyperpigmentation disorder and useful for self-tanning cosmetic products. Source

Jo W.S.,Korea Institute of Radiological and Medical Sciences | Jo W.S.,NLP Co. | Yang K.M.,Korea Institute of Radiological and Medical Sciences | Yang K.M.,NLP Co. | And 10 more authors.
Toxicological Research | Year: 2012

Exposure of cells to ultraviolet B (UVB) radiation can induce production of free radicals and reactive oxygen species (ROS), which damage cellular components. In addition, these agents can stimulate the expression of matrix metalloproteinase (MMP) and decrease collagen synthesis in human skin cells. In this study, we examined the anti-photoaging effects of extracts of Tetraselmis suecica (W-TS). W-TS showed the strongest scavenging activity against 2,2-difenyl-1-picrylhydrazyl (DPPH) and peroxyl radicals, followed by superoxide anions from the xanthine/xanthine oxidase system. We observed that the levels of both intracellular ROS and lipid peroxidation significantly increased in UVB-irradiated human skin fibroblast cells. Furthermore, the activities of enzymatic antioxidants (e.g., superoxide dismutase) and the levels of non-enzymatic antioxidants (e.g., glutathione) significantly decreased in cells. However, W-TS pretreatment, at the maximum tested concentration, significantly decreased intracellular ROS and malondialdehyde (MDA) levels, and increased superoxide dismutase and glutathione levels in the cells. At this same concentration, W-TS did not show cytotoxicity. Type 1 procollagen and MMP-1 released were quantified using RT-PCR techniques. The results showed that W-TS protected type 1 procollagen against UVBinduced depletion in fibroblast cells in a dose-dependent manner via inhibition of UVB-induced MMP-1. Taken together, the results of the study suggest that W-TS effectively inhibits UVB-induced photoaging in skin fibroblasts by its strong anti-oxidant ability. Source

Kang Y.M.,Marine Bioprocess Co. | Lee B.-J.,Marine Bioprocess Co. | Kim J.I.,Dong - A University | Nam B.-H.,Marine Bio Industry Development Center | And 6 more authors.
Food and Chemical Toxicology | Year: 2012

A randomized, double-blind, and placebo-controlled clinical study was performed to evaluate the antioxidant effects of fermented sea tangle (FST) on healthy volunteers with high levels of γ-glutamyltransferse (γ-GT). Forty-eight participants were divided into a placebo group and an FST group that received FST (1.5. g/day) for 4. weeks. Serum γ-GT, malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx) activities were determined before and after the trial. Administering FST significantly decreased serum levels of γ-GT and MDA. Additionally, SOD and CAT activities were significantly augmented compared to those in the placebo group after 4. weeks, but no significant alteration was observed in GPx activity compared to that in the placebo group. Our findings indicate that FST enhanced the antioxidant defense system in a healthy population and may be useful as a functional food ingredient. © 2011 Elsevier Ltd. Source

Lee B.-J.,Marine Bioprocess Co. | Lee B.-J.,Gyeongsang National University | Senevirathne M.,Chonnam National University | Kim J.-S.,Gyeongsang National University | And 8 more authors.
Food and Chemical Toxicology | Year: 2010

Sea tangle has long been used as Korean folk remedy to promote material health, and is one of the popular dietary supplement. This study was designed to evaluate the protective effect of fermented sea tangle (FST) against ethanol and carbon tetrachloride (CCl4)-induced hepatotoxicity in rats. Sprague-Dawley rats were orally treated with FST (25, 250, 2500 mg/kg/day) with administration of ethanol (5 mL/kg) for 13 weeks and the single intraperitoneal (i.p.) dose of 50% CCl4 (5 mL/kg/day, CCl4 in olive oil) at 12 week, and repeated i.p. dose of 20% CCl4 (2 mL/kg/day) for 1 week. Hepatotoxicity was evaluated by measuring the serum levels of glutamic pyruvate transaminase (GPT), gamma glutamyl transpeptidase (γ-GT) and malondialdehyde (MDA) as well as the tissue levels of antioxidant enzyme such as superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx). Ethanol and CCl4-induced the rat liver damage, and significantly increased (p < 0.05) the GPT, γ-GT and MDA levels, and decreased the SOD, CAT and GPx levels. However, treatment with FST could decrease serum GPT, γ-GT, and MDA levels significantly in plasma, and increase the activities of SOD, CAT, and GPx in liver tissues compared with ethanol and CCl4-treated group. © 2010 Elsevier Ltd. Source

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