IN VITRO ANTIOXIDANT AND ANTIPROLIFERATIVE ACTIVITIES OF BIOACTIVE PEPTIDE ISOLATED FROM NEMIPTERUS JAPONICUS BACKBONE

In the present study, bioactive peptide was isolated from protein hydrolysate of Nemipterus japonicus backbone hydrolysed by trypsin. Functional properties like solubility, emulsifying, and foaming capacities of protein hydrolysate were governed by pH. Protein hydrolysate was fractionated by DEAE XK 26/20 anion exchange chromatography followed by G-25 gel filtration chromatography. The fractions collected were tested for radical scavenging properties on DPPH, hydroxyl, and superoxide radicals by electron spin resonance spectrometer. Amino acid composition of a potent fraction was rich in glutamic acid (21.20 g/100 g), lysine (37.50 g/100 g), aspartic acid (5.8 g/100 g), arginine (5.4 g/100 g), and glycine (2.84 g/100 g). Moreover, the potent fraction showed no cytotoxicity on Vero cell lines till 0-100 mu g/ml with CC50 = 94 mu g/ml, whereas it exerted a significant antitumor property against HepG(2) cell line with an IC50 value of 61.1 mu g/ml.