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Kim S.S.,Kyungpook National University | Seo J.Y.,Kyungpook National University | Lim S.S.,Hallym University | Suh H.J.,Gyeongbuk Natural Color Industry Institute | And 2 more authors.
Food Science and Biotechnology | Year: 2015

Aqueous extracts of Reseda luteola L. used as a dyeing agent for centuries have antioxidant activities. The neuroprotective effect of aqueous herb extracts were investigated against glutamate-induced reactive oxygen species (ROS) insult using mouse hippocampal HT22 and cortical neural cells. Aqueous extracts and the hexane fraction of R. luteola L. effectively attenuated the cytotoxicity of glutamate (5 mM) in both HT22 and primary neural cells derived from the mouse cortex. The neuroprotective effect was attributable to unidentified components and luteolin, which is known as a biologically active constituent. Aqueous extracts of R. luteola L. deserve further study for identification of active components and development of food colorants with health benefits. © 2015, The Korean Society of Food Science and Technology and Springer Science+Business Media Dordrecht. Source

Kim B.R.,Kyungpook National University | Seo J.-Y.,Kyungpook National University | Sung M.-K.,Sookmyung Womens University | Park J.H.Y.,Hallym University | And 3 more authors.
Molecular Nutrition and Food Research | Year: 2015

Scope: Our previous study showed that glyceollins induced phase 2 detoxifying and antioxidant enzymes. As chemical carcinogens can be detoxified by metabolic activity of phase 2 enzymes, subsequently decreasing their tumorigenic potential, we investigated whether 7,12-dimethylbenz(a)anthracene (DMBA)-induced mammary tumorigenesis could be attenuated by treatment with glyceollins in a mouse model. Methods and results: Pretreatment with glyceollins (5 mg/kg body weight) caused a significant reduction in tumor formation and an increase in survival rate. The protective effect of glyceollins against DMBA-induced tumorigenesis was found to be mainly associated with their potential to induce phase 2/antioxidant enzymes that are, in turn, regulated by the nuclear factor E2-related factor 2 signaling pathway, and to a less extent to suppress phase 1 enzymes. As glyceollins increased the number of terminal end buds, a tumor-prone mammary tissue type in mice, it is unlikely that they exert their antitumorigenic action through their estrogenic activity. Conclusion: Glyceollins were found to have a protective effect in a chemically induced mammary tumor model. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

Park S.,Kyungpook National University | Seok J.K.,Kyungpook National University | Kwak J.Y.,Kyungpook National University | Suh H.-J.,Gyeongbuk Natural Color Industry Institute | And 2 more authors.
Evidence-based Complementary and Alternative Medicine | Year: 2016

Epidemiological and experimental evidence support health risks associated with the exposure to airborne particulate matter with a diameter of <10 μM (PM10). PM10 stimulates the production of reactive oxygen species (ROS) and inflammatory mediators. Thus, we assumed that natural antioxidants might provide health benefits attenuating hazardous effects of PM10. In the present study, we examined the effects of pomegranate peel extract (PPE) on THP-1 monocytic cells exposed to PM10. PM10 induced cytotoxicity and the production of ROS. It also increased the expression and secretion of inflammatory cytokines, such as tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and monocyte chemoattractant protein-1 (MCP-1), and cell adhesion molecules, such as intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1). PPE at 10-100 μg mL-1 attenuated the production of ROS and the expression of TNF-α, IL-1β, MCP-1, and ICAM-1, but not VCAM-1, in THP-1 cells stimulated by PM10 (100 μg mL-1). PPE also attenuated the adhesion of PM10-stimulated THP-1 cells to EA.hy926 endothelial cells. PPE constituents, punicalagin and ellagic acid, attenuated PM10-induced monocyte adhesion to endothelial cells, and punicalagin was less cytotoxic compared to ellagic acid. The present study suggests that PPE and punicalagin may be useful in alleviating inflammatory reactions due to particulate matter. © 2016 Soojin Park et al. Source

Park J.,Kyungpook National University | Seok J.K.,Kyungpook National University | Suh H.-J.,Gyeongbuk Natural Color Industry Institute | Boo Y.C.,Kyungpook National University | Boo Y.C.,Ruby Crown Co.
Evidence-based Complementary and Alternative Medicine | Year: 2014

Ultraviolet radiation (UV) is a major cause of photoaging, which also involves inflammatory cytokines and matrix metalloproteinases (MMP). The present study was undertaken to examine the UVB-protecting effects of yellow-colored plant extracts in cell-based assays. HaCaT keratinocytes were exposed to UVB in the absence or presence of plant extracts, and resulting changes in cell viability and inflammatory cytokine expression were measured. Of the plant extracts tested, Gardenia jasminoides extract showed the lowest cytotoxicity and dose-dependently enhanced the viabilities of UVB-exposed cells. Gardenia jasminoides extract also attenuated the mRNA expressions of interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) in HaCaT cells stimulated by UVB. Conditioned medium from UVB-exposed HaCaT cells was observed to stimulate MMP-1 protein expression in human dermal fibroblasts, and this effect was much smaller for the conditioned medium of HaCaT cells exposed to UVB in the presence of Gardenia jasminoides extract. Gardenia jasminoides extract also exhibited antioxidative and antiapoptotic effects in HaCaT cells exposed to UVB. These results indicated that UVB-induced injury and inflammatory responses of skin cells can be attenuated by yellow-colored plant extracts, such as Gardenia jasminoides extract. © 2014 Jiaa Park et al. Source

Seo J.Y.,Kyungpook National University | Kim S.S.,Kyungpook National University | Kim S.S.,Gyeongbuk Natural Color Industry Institute | Kim J.-S.,Kyungpook National University
Preventive Nutrition and Food Science | Year: 2014

Excessive ethanol intake is known to induce a number of physiological symptoms, including headache, dizziness and vertigo. In this study, we investigated the attenuation effect of sprouted peanut extract (SPE) on ethanol-induced hangover in male Sprague-Dawley rats. The animals were divided into five groups: the control group, which was administered ethanol only; the ethanol plus SPE experimental groups, which were administered ethanol and 100, 200, or 400 mg SPE/kg b.w.; and the positive control group, which was administered ethanol plus DAWN808®, a commercial product. SPE-suspended water was delivered to rats via gavage 15 h and 30 min before the administration of ethanol. Blood was collected from the tail 0, 1, 3, and 5 h after ethanol administration. The results showed that serum ethanol concentrations were significantly lower in SPE treated groups than in the control group. Furthermore, hepatic alcohol and acetaldehyde dehydrogenase activities were enhanced by SPE in a dose dependent manner. These results suggest that SPE could be useful in attenuating hangover after alcohol consumption. Copyright © 2014 by The Korean Society of Food Science and Nutrition. All rights Reserved. Source

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