@article{APS6166,
author = {Xiao-Qing He and Pei-Yan Zhang and Xuan Tian and Jin-Xin Li},
title = {Effects of 4-(4\"-(2\",2\",6\",6\"-tetramethyl-1\"-pipe-ridinyloxy) amino)-4'-demethylepipodophyllotoxin on nucleic acids, proteins, and DNA strand of L7712 cells in vitro},
journal = {Acta Pharmacologica Sinica},
volume = {13},
number = {3},
year = {2016},
keywords = {},
abstract = {The antitumor activity of GP-7, a new spin-labeled epipodophyllotoxin, was studied by liquid scintillation spectrometry. There were many similarities between GP-7 and etoposide. Both GP-7 and etoposide inhibited the incorporation of [3H]TdR, [3H]UR, and [3H]Leu into DNA, RNA, and protein synthesis in leukemia 7712 cells. The inhibition correlated with drug concentration and duration. IC50 of GP-7 and etoposide on DNA synthesis at 24 h were 0.21 and 0.37 micrograms.ml-1, respectively. The inhibition of GP-7 or etoposide on DNA synthesis retained even after the drug were washed out for 3 h. GP-7 and etoposide caused DNA single-strand breaks, with a well concentration-response relationship. These data suggest that the inhibition of DNA synthesis by GP-7 or etoposide is likely due to the damage of DNA template and breaking of single-strand DNA.},
issn = {1745-7254}, url = {http://www.chinaphar.com/article/view/6166}
}