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利用第二军医大学裸鼠移植性肝癌细胞（ＳＭＭＣ－ＬＴＮＭ）和不同的ＤＮＡ聚合酶选择性抑制剂ＮＥＭ与ｄ２ＴＴＰ，探讨了肿瘤细胞核中ＤＮＡ聚合酶Ｂ参与γ射线辐射损伤ＤＮＡ修复的作用特点。结果表明，该酶参与真核细胞｝射线辐照损伤的ＤＮＡ修复合成，是一种重要的ＤＮＡ修复酶；与正常肝细胞相比，ＳＭＭＣ－ＬＴＮＭ肝癌细胞ＤＮＡ聚合酶β的ＤＮＡ修复合成反应速度快，修复能力强。提示某些肿瘤细胞中该酶的ＤＮＡ辐射损伤修复合成功能比正常细胞的大。
Using the SMMC-LTNM and the different selective DNA polymerase inhibitors NEM and d2TTP in the Second Military Medical University, we investigated the role of DNA polymerase B in tumor nuclei involved in DNA repair by γ-ray radiation injury. The results show that this enzyme is involved in DNA repair synthesis of eukaryotic cells irradiated by γ-rays and is an important DNA repair enzyme; the rate of DNA repair and synthesis of DNA polymerase β in SMMC-LTNM hepatoma cells compared with normal hepatocytes Fast, strong repair ability. It suggests that the DNA damage repair synthesis function of this enzyme in some tumor cells is larger than that of normal cells.