信号转导和转录激活因子 3 (STAT3) 蛋白是大多数癌症关键标志和促成因素的主要调节因子,包括细胞增殖和对 DNA 损伤的反应。G-四链体 (G4) 结构是在端粒和癌基因启动子处富集的四链非规范 DNA 结构。在癌细胞中,G4 DNA 的稳定导致复制压力和 DNA 损伤积累,因此被认为是肿瘤治疗的有希望的靶点。在这里,我们设计并合成了新型喹唑啉类化合物,它们同时并选择性地影响这两个公认的癌症靶标、G4 DNA 结构和 STAT3 蛋白。结合体外分析、核磁共振和分子动力学模拟,我们表明这些小的、不带电荷的化合物不仅与 STAT3 蛋白结合,而且还稳定 G4 结构。在人类培养的细胞中,这些化合物抑制 STAT3 的磷酸化依赖性激活,而不影响抗凋亡因子 STAT1 并导致 G4 结构的形成增加,正如使用 G4 DNA 特异性抗体所揭示的那样。结果,经过处理的细胞显示出较慢的 DNA 复制、DNA
Identification of Substituted 6-Amino-4-phenyltetrahydroquinoline Derivatives: Potent Antagonists for the Follicle-Stimulating Hormone Receptor
摘要:
Substituted 6-amino-4-phenyl-tetrahydroquinoline derivatives are described that are antagonists for the G(s)-protein-coupled human follicle-stimulating hormone (FSH) receptor. These compounds show high antagonistic efficacy in vitro using a CHO cell line expressing the human FSH receptor. Antagonist 10 also showed a submicromolar IC50 in a more physiologically relevant rat granulosa cell assay and was found to significantly inhibit follicle growth and ovulation in an ex vivo mouse model. This compound class may open the way toward a novel, nonsteroidal approach for contraception.
Novel facile synthesis of 2,2,4 substituted 1,2-dihydroquinolines via a modified Skraup reaction
作者:Maria-Elena Theoclitou、Leslie A. Robinson
DOI:10.1016/s0040-4039(02)00614-7
日期:2002.5
A variety of 2,2,4 substituted 1,2-dihydroquinolines were synthesized from substituted anilines or aminoheterocycles and the corresponding ketones in good yield via the use of lanthanide catalysts and microwave technology. This method can be readily applied to the general synthesis of combinatorial libraries of dihydroquinolines.
[EN] COMPOUNDS TARGETING DUAL G-QUADRUPLEX DNA AND STAT3<br/>[FR] COMPOSÉS CIBLANT L'ADN DOUBLE G-QUADRUPLEXE ET LE STAT3
申请人:SABOURI NASIM
公开号:WO2020263164A1
公开(公告)日:2020-12-30
The present invention relates to novel quinazoline compounds having the formula (I) or (II): (I) (II). The compounds are active both as stabilizers of G-quadruplex DNA structures and as inhibitors of STAT3 phosphorylation. The disclosed compounds are useful in medical treatment, such as the treatment of cancer.
New fluorescence-based high-throughput screening assay for small molecule inhibitors of tyrosyl-DNA phosphodiesterase 2 (TDP2)
作者:Carlos J.A. Ribeiro、Jayakanth Kankanala、Ke Shi、Kayo Kurahashi、Evgeny Kiselev、Azhar Ravji、Yves Pommier、Hideki Aihara、Zhengqiang Wang
DOI:10.1016/j.ejps.2018.03.021
日期:2018.6
molecular structure basis for TDP2 inhibitordiscovery. The assay was validated by screening a preselected library of 1600 compounds (Z′ ≥ 0.72) in a 384-well format, and by running in parallel gel-based assays with fluorescent DNA substrates. This library was curated via virtual high throughput screening (vHTS) of 460,000 compounds from Chembridge Library, using the crystal structure of the novel
Design of new hybrid template by linking quinoline, triazole and dihydroquinoline pharmacophoric groups: A greener approach to novel polyazaheterocycles as cytotoxic agents
作者:Koduru Sri Shanthi Praveena、Edupuganti Veera Venkat Shivaji Ramarao、Nandula Yadagiri Sreenivasa Murthy、Surekha Akkenapally、C. Ganesh Kumar、Ravikumar Kapavarapu、Sarbani Pal
DOI:10.1016/j.bmcl.2015.01.012
日期:2015.3
A new hybrid template designed by linking three pharmacophoric groups, for example, quinoline, triazole and dihydroquinoline moieties have been used for the generation of a library of molecules as potentialcytotoxicagents. Synthesis of these polyazaheterocycles were carried out by using a strategy that involved one-pot sequential azidation and CuAAC in water under mild conditions. A number of 1,4-disubstituted
A new way of forming the aza-o-xylylene with easily accessible 1,2-dihydroquinolines as precursor has been developed. The presence of an electron-donating group at the proper position of 1,2-dihydroquinoline was crucial for protonation of the alkene through dearomatization with a simple Brønsted acid. The in situ forming reactive intermediate was trapped with Hantzsch ester to afford tetrahydroquinolines