항 방사선 인삼단백분획의 DNA수복능력 증진효과

DNA Repair Enhancement by Radioprotective Ginseng Protein Fraction

The effect of radioprotective ginseng protein fraction on DNA repair capacity was determined by measuring the amount of ^H-thymidine incorporated into DNA in the process of repair synthesis for UV damaged DNA. CHO-Kl cells were prepared whose semiconservative replication was inhibited by trimethylpsoralen plus near-UV(PUVA) treatment. When the cells were exposed to UV light alone, the DNA repair capacity was increased at first and then decreased as UV dose increased. However, when the ginseng fraction was treated to the cells, the DNA repair capacity was kept increasing regardless of UV dose increment. When the concentration of protein contained int the added fraction was increased gradually, the repair capacity was also increasea almost linearly showing dose-response relationship of the effect. These results suggest that the enhancement of DNA repair capaclty of the cell can be one of the mechanisms of radioprotection by the ginseng fraction.