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Peptide Isolated from Japanese Flounder Skin Gelatin Protects against Cellular Oxidative Damage
Himaya, S. W. A.,Ryu, BoMi,Ngo, Dai-Hung,Kim, Se-Kwon American Chemical Society 2012 Journal of agricultural and food chemistry Vol.60 No.36
<P>Gelatin was extracted from the skin of Japanese flounder (Palatichtys olivaceus) and was subjected to enzymatic hydrolysis. The peptic hydrolysate resulted in a potent antioxidative peptide Gly-Gly-Phe-Asp-Met-Gly (582 Da), which bears +12.61 kcal/mol hydrophobicity. The antioxidative potential of the peptide was characterized by analyzing the protective effect of the peptide on reactive oxygen species (ROS)-mediated intracellular macromolecule damage. It was found that the peptide is a potent scavenger of intracellular ROS, thereby protecting the radical-mediated damage of membrane lipids, proteins, and DNA. Moreover, the peptide is capable of upregulating the expression of inherent antioxidative enzymes, superoxide dismutase-1, glutathione, and catalase. Collectively, it can be concluded that Japanese flounder skin, a processing byproduct of filleting, can be effectively used to produce a bioactive peptide with potent antioxidant capacity.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jafcau/2012/jafcau.2012.60.issue-36/jf302161m/production/images/medium/jf-2012-02161m_0006.gif'></P>