Food Science and Biotechnology

Korean Society of Food Science and Technology (한국식품과학회)
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Antioxidant, Antimicrobial, and Antitumor Activities of Partially Purified Substance(s) from Green Tea Seed

  • Choi, Jae-Hoon (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Nam, Jung-Oak (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Kim, Ji-Yeon (Department of Animal Science, Woosong Information College) ;
  • Kim, Jin-Man (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Paik, Hyun-Dong (Department of Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Kim, Chang-Han (Department of Food Science and Biotechnology of Animal Resources, Konkuk University)
  • Published : 2006.10.30
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Abstract

The aim of this study is to evaluate the antioxidant, antimicrobial, and antitumor activities of various concentrations of partially purified substance(s) from green tea seed (Camellia sinensis L.). The total polyphenol contents of each fraction (non-adsorption fraction: F-1, fraction eluted with 40% methanol: F-2, and fraction eluted with 100% methanol: F-3) purified by Diaion HP-20 column chromatography were, in the increasing order: F-1 (3.7 mg tannic acid equivalents, TAB/g) < F-3 (23.2 mg TAB/g) < seed extracts (26.2 mg TAB/g) < F-2 (42.7 mg TAB/g). The scavenging activities toward the 1,1-diphenyl-2-picyrylhydrazyl (DPPH) radical were, in decreasing order: F-2 (93.3%) > butylated hydroxytoluene (BHT; 89.8%) > ascorbic acid (89.3%) > leaf extracts (70.3%) > F-3 (15.9%) > seed extracts (15.8%) > F-1 (14.8%) at a 0.1% concentration. In studies on antimicrobial activities, the results indicate that the growth of yeast (Candida albicans KCCM 11282 and Cryptococcus neoformans KCCM 50544) was inhibited more so than that of other fungi (Alternaria alternate KCTC 6005 and Rhizoctonia solani). In addition, it appears that the antitumor activities of the F-1, F-2, and F-3 fractions at a concentration of $50\;{\mu}g/mL$ showed 6, 7, and 23% growth inhibition of the HEC-1B cell line, 14, 11, 82% inhibition of the HEP-2 cell line, and 8, 16, and 81% inhibition of the SK-OV-3 cell line, respectively. Overall these results indicate that the antioxidant activity is greatest in the F-2 fraction, and the antimicrobial and antitumor activities are greatest in the F-3 fraction.

Keywords

References

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