NDLI: Antioxidant activity of Fragilariopsis pseudonana and protective effect against hydrogen peroxide-induced inhibition of gap junctional intercellular communication

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Food Science and Biotechnology : Volume 21, Issue 1, February 2012

Food Science and Biotechnology : Volume 20

Food Science and Biotechnology : Volume 19

Antioxidant activity of Fragilariopsis pseudonana and protective effect against hydrogen peroxide-induced inhibition of gap junctional intercellular communication

Content Provider	Springer Nature Link
Author	Um, Min Young Kang, Sung Ho Ahn, Ji Yun Ha, Tae Youl
Copyright Year	2012
Abstract	This study was aimed to evaluate antioxidant activities of a methanol extract from the polar microalgae Fragilariopsis pseudonana (FP) and to investigate the protective effect for gap junctional intercellular communication (GJIC) in WB-F344 normal rat liver epithelial cells. The results indicated that the methanol extract of FP (FPM) scavenged ABTS free radicals and inhibited copper-induced low density lipoprotein oxidation in a dose-dependent manner. Exposing HepG2 cells to FeSO4 increased intracellular reactive oxygen species formation and lipid peroxides, which was significantly reduced by treatment with FPM. Furthermore, FPM increased the activities of superoxide dismutase and glutathione peroxidase in cells. FPM recovered the hydrogen peroxide (H2O2)-induced inhibition of GJIC and attenuated the phosphorylation of connexin 43 (Cx43) and extracellular signal-regulated kinase1/2 (ERK1/2). Taken together, these results demonstrated that FPM has antioxidant activity and protects against H2O2-induced inhibition of GJIC by blocking phosphorylation of Cx43 via activation of ERK1/2.
Starting Page	435
Ending Page	441
Page Count	7
File Format	PDF
ISSN	12267708
Journal	Food Science and Biotechnology
Volume Number	21
Issue Number	2
e-ISSN	20926456
Language	English
Publisher	The Korean Society of Food Science and Technology
Publisher Date	2012-04-30
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fragilariopsis pseudonana oxidative stress antioxidant activity gap junctional intercellular communication Food Science Nutrition
Content Type	Text
Resource Type	Article
Subject	Applied Microbiology and Biotechnology Food Science Biotechnology

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