Evaluation of Cancer Chemopreventive Potential of Various Grape Shoot Extracts and Refined Materials Using in vitro Bioassay Systems

  • Published : 2004.06.01

Abstract

Since reactive oxygen species, prostaglandins, and nitric oxide are closely involved in various pathological conditions anti play important roles in the initiation, promotion, and progression of carcinogenesis, agents that modulate the production or activity of them might be considered as cancer chemopreventive agents. In the present study, we evaluated chemopreventive potential of some grape shoot extracts and their refined materials using various in vitro assay systems. As a result, both grape shoot extracts and refined materials possessed effective radical scavenging activities about 70~80% at the concentration of 500 ${\mu}$g/ml, and especially the Sheridan shoot extract showed the most potent 1, 1-diphenyl-2-picrylhydrazyl radical scavenging activity that was similar to resveratrol. In addition, refined materials from grape shoot extracts suppressed lipopolysaccharide-induced nitric oxide production in macrophage cells, anti refined materials from Kyoho and Campbell shoot extracts exhibited similar inhibitory activities with $IC_{50}$ value of 224 ${\mu}$g/ml and 285 ${\mu}$g/ml, respectively. In addition, at the concentration of 50 ${\mu}$g/ml, all of refined materials inhibited cell proliferation against various human cancer cells about 30~40% compared to control. These findings suggest that grape shoot extract and their refined materials might be useful sources for the development of chemopreventive agents and/or functional foods.

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