Cytotoxicity and Antiestrogenicity of a Novel Series of Basic Diphenylethylenes
摘要:
On the premise that it is necessary to develop antiestrogens with a higher cytotoxic component in order to reduce the risks of the development of heterogeneous malignant cell populations in breast cancer, we studied a novel series of basic diphenylethylenes, for the most part devoid of estrogenic activity, with low antiestrogenicity but much enhanced cytotoxicity compared to the reference drug tamoxifen. The main structural features associated with cytotoxicity were E isomery, substituents of five to eight carbons on the ethylene bond, and dibasicity.
Cytotoxicity and Antiestrogenicity of a Novel Series of Basic Diphenylethylenes
摘要:
On the premise that it is necessary to develop antiestrogens with a higher cytotoxic component in order to reduce the risks of the development of heterogeneous malignant cell populations in breast cancer, we studied a novel series of basic diphenylethylenes, for the most part devoid of estrogenic activity, with low antiestrogenicity but much enhanced cytotoxicity compared to the reference drug tamoxifen. The main structural features associated with cytotoxicity were E isomery, substituents of five to eight carbons on the ethylene bond, and dibasicity.
Practical Synthesis of FEt-penta-cyclofenil and Its Derivatives for Potential PET Imaging
作者:Hua Zhu、Liliang Huang、Xiaoping Xu、Yu-Mei Shen
DOI:10.1080/00397910903419829
日期:2010.10.20
Generally, FEt-penta-cyclofenil and its derivatives have greater relative binding affinity to estradiol receptors than estradiol. (4-Fluoroethoxyphenyl)-(4'-hydroxyphenyl) methylenecyclopentane and its derivatives were synthesized for potential radioactive image agents, and their structures were characterized by ultraviolet, infrared, 1H NMR, 19F NMR, and high-resolution mass spectrometry.
Synthesis and evaluation of fluoroethyl cyclofenil analogs: Models for potential estrogen receptor imaging agent
Cyclofenil analogs (2a-2f) and their fluorine-containing derivatives (3a-3f) were synthesized and evaluated as candidate ligands for positron emission tomography (PET) imaging of estrogen receptors. Most of them show relatively high binding affinities comparable with estradiol (E-2). (4-Fluoroethoxyphenyl)-(4-hydroxyphenyl) methylenecyclopentane (3a) showed both the highest binding affinity for ERs (88.6 for ER beta, 13.8 for ER alpha) and highest beta/alpha ratio (beta/alpha for 6.4-fold). The radioactive compound [F-18]3a was prepared via displacement of the corresponding mesylate precursor 4 with [F-18]fluoride (F-18: beta(+): 96.7%, T-1/2 = 109.8 min). The biodistribution studies in immature female SD rats demonstrated that the uptake in the uterus and ovaries were 1.358 +/- 0.089% ID/g, 1.439 +/- 0.214% ID/g, respectively, both of the ratios of uterus/blood and ovaries/blood was less than 2:1. Micro-PET imaging of immature female SD rats has also been reported. (C) 2012 Elsevier B.V. All rights reserved.
Cytotoxicity and Antiestrogenicity of a Novel Series of Basic Diphenylethylenes
On the premise that it is necessary to develop antiestrogens with a higher cytotoxic component in order to reduce the risks of the development of heterogeneous malignant cell populations in breast cancer, we studied a novel series of basic diphenylethylenes, for the most part devoid of estrogenic activity, with low antiestrogenicity but much enhanced cytotoxicity compared to the reference drug tamoxifen. The main structural features associated with cytotoxicity were E isomery, substituents of five to eight carbons on the ethylene bond, and dibasicity.