DNA site-specific N3-adenine methylation targeted to estrogen receptor-positive cells
作者:Rigel J. Kishton、Sean E. Miller、Heather Perry、Tera Lynch、Mayur Patel、Vinayak K. Gore、Giridhar R. Akkaraju、Sridhar Varadarajan
DOI:10.1016/j.bmc.2011.07.026
日期:2011.9
A compound that can target cells expressing the estrogen receptor (ER), and produce predominantly 3-MeA adducts in those cells has been designed and synthesized. This compound produces mainly the 3-MeA adduct upon reaction with calf thymus DNA, and binds to the ER with a relative binding affinity of 51% (estradiol = 100%). The compound is toxic to ER-expressing MCF-7 breast cancer cells, and pretreatment with the ER antagonist fulvestrant abrogates the toxicity. Pre-treatment of MCF-7 cells with netropsin, which inhibits N3-adenine methylation by the compound, resulted in a threefold decrease in the toxicity. These results demonstrate the feasibility of this strategy for producing 3-MeA adducts in targeted cells. (C) 2011 Elsevier Ltd. All rights reserved.