毒理性
毛茛素(RAN)抑制了3H标记的前体物掺入L1210细胞的DNA和RNA中。RAN(15微摩尔/升)显著降低了由DNA聚合酶I催化的DNA合成,并促进了DMSO/KO2系统中超氧阴离子的生成。同时,超氧化物歧化酶(SOD)和过氧化氢酶(CAT)部分恢复了RAN对3H-TdR掺入DNA的抑制作用。RAN在体外的细胞毒性可能是由于抑制了DNA聚合酶并增加了氧自由基的产生。(A15425)
Ranunculin (RAN) inhibited the incorporation of 3H-labeled precursors into DNA and RNA of L1210 cells. RAN (15 mumol/L) markedly decreased DNA synthesis catalyzed by DNA polymerase I and promoted the generation of superoxide anions in DMSO/KO2 system. In the meantime, SOD and CAT were shown to partly revoke the inhibitory effects of RAN upon the incorporation of 3H-TdR into DNA. The cytotoxicity of RAN in vitro may be due to inhibition of DNA polymerase and increase of oxygen free radicals. (A15425)
来源:Toxin and Toxin Target Database (T3DB)