Nitrated Indenoisoquinolines as Topoisomerase I Inhibitors: A Systematic Study and Optimization
作者:Andrew Morrell、Michael Placzek、Seth Parmley、Smitha Antony、Thomas S. Dexheimer、Yves Pommier、Mark Cushman
DOI:10.1021/jm070361q
日期:2007.9.1
The biological activity of indenoisoquinoline topoisomerase I (Topl) inhibitors can be greatly enhanced depending on the choice of substituents on the aromatic rings and lactam side chain. Previously, it was discovered that a 3-nitro group and a 9-methoxy group afforded enhanced biological activity. In the present investigation, indenoisoquinoline analogues were systematically prepared using combinations of nitro groups, methoxy groups, and hydrogen atoms in an effort to understand the contribution of each group toward cytotoxicity and Top I inhibition. Analysis of the biological results suggests that the nitro group is important for Top I inhibition and the methoxy group improves cytotoxicity. In addition, previously identified structure-activity relationships were utilized to select favorable lactam side chain functionalities for incorporation on the aromatic skeleton of analogues in this study. As a result, this investigation has provided optimal Topl inhibitors equipotent to camptothecin that demonstrate low nanomolar cytotoxicities toward cancer cells.
PATIENT SELECTION FOR TREATMENT OF MYC POSITIVE CANCERS WITH INDENOISOQUINOLINES
申请人:Purdue Research Foundation
公开号:US20210382058A1
公开(公告)日:2021-12-09
The present disclosure is directed to a method for selecting a patient with cancer for treatment with a compound of formula (I) by determining if the patient's cancer cells are MYC-positive and when the MYC promoter sequence in those cancer cells contains a nucleic acid sequence capable of forming a MYC G-quadruplex (MYC G4) (i.e. are MYC G4-positive) and treating the patient with a compound of formula (I).
Targeting the <i>c-Kit</i> Promoter G-quadruplexes with 6-Substituted Indenoisoquinolines
作者:Mallesham Bejugam、Mekala Gunaratnam、Sebastian Müller、Deborah A. Sanders、Sven Sewitz、Jonathan A. Fletcher、Stephen Neidle、Shankar Balasubramanian
DOI:10.1021/ml100062z
日期:2010.10.14
properties, and preliminary biological evaluation of 6-substitutedindenoisoquinolines as a new class of G-quadruplex stabilizing small molecule ligands. We have synthesized 6-substitutedindenoisoquinolines 1a−e in two steps from commercially available starting materials with excellent yields. The G-quadruplex stabilization potential of indenoisoquinolines 1a−e was evaluated by fluorescence resonance energy
在此,我们展示了 6-取代茚并异喹啉作为一类新型 G-四链体稳定小分子配体的设计、合成、生物物理特性和初步生物学评价。我们从市售的起始原料分两步合成了 6-取代的茚并异喹啉1a - e ,产率很高。茚并异喹啉1a - e的 G-四链体稳定电位通过荧光共振能量转移熔融分析评估,表明茚并异喹啉对各种 G-四链体 DNA 结构具有高度的稳定性。Indenoisoquinolines 在 GIST882 患者来源的胃肠道间质瘤细胞系中显示出对细胞生长的有效抑制,同时抑制c-Kit转录和 KIT 癌蛋白水平。