64951-58-2Relevant academic research and scientific papers
Potent antiproliferative activity of bradykinin B2 receptor selective agonist FR-190997 and analogue structures thereof: A paradox resolved?
Rassias, Gerasimos,Leonardi, Sofia,Rigopoulou, Dionisia,Vachlioti, Eleanna,Afratis, Konstantinos,Piperigkou, Zoi,Koutsakis, Christos,Karamanos, Nikos K.,Gavras, Haralambos,Papaioannou, Dionissios
, (2020/11/12)
Βradykinin stimulation of B2 receptor is known to activate the oncogenic ERK pathway and overexpression of bradykinin receptors B1 and B2 has been reported to occur in glioma, colorectal and cervical cancers. B1R and B2R antagonists have been shown to reverse tumor proliferation and invasion. Paradoxically, B1R and B2R agonism has also been reported to elicit antiproliferative benefits. In order to complement the data accumulated to date with the natural substrate bradykinin and peptidic B2R antagonists, we decided to examine for the first time the response elicited by B2R stimulation in breast cancer lines with a non-peptidic small molecule B2R agonist. We synthesized and assessed the highly selective and potent B2R partial agonist FR-190997 in MCF-7 and MDA-MBA-231 breast cancer lines and found it possessed significant antiproliferative activity (IC50 2.14 and 0.08 μΜ, respectively). The modular nature of FR-190997 allowed us to conduct a focused SAR study and discover compound 10 which exhibits subnanomolar antiproliferative activity (IC 50 0.06 nΜ) in the TNBC MDA-MBA-231 cell line. This performance surpasses, in most cases by several orders of magnitude, those of established anticancer agents and FDA-approved breast cancer drugs. In line with the established literature we suggest that this remarkable activity precipitates from a dual mode of action involving agonist-induced receptor internalization/degradation combined with sequestration of functional intracellular B2 receptors and inhibition of the associated endosomal signaling. The latter mode may be realized by appropriate ligands regardless of B2R agonist/antagonist designation which only relates to membrane residing GCPRs. Under this prism the controversy over the antiproliferative effects of B2 agonists and antagonists is potentially neutralized.
Synthesis, SAR study, and bioactivity evaluation of a series of Quinoline-Indole-Schiff base derivatives: Compound 10E as a new Nur77 exporter and autophagic death inducer
Chen, Jingwei,Chen, Kun,Fang, Meijuan,He, Fengming,Huang, Jiangang,Li, Baicun,Lin, Zongxin,Liu, Jie,Liu, Shunzhi,Wang, Wang,Wu, Tong,Yao, Jie,Zeng, Jin-Zhang
, (2021/06/15)
We previously reported 5-((8-methoxy-2-methylquinolin-4-yl)amino)-1H-indole- 2-carbohydrazide derivatives as new Nur77 modulators. In this study, we explored whether the 8-methoxy-2-methylquinoline moiety and bicyclic aromatic rings at the N’-methylene position were critical for their antitumor activity against hepatocellular carcinoma (HCC). For this purpose, a small library of 5-substituted 1H-indole-2-carbohydrazide derivatives was designed and synthesized. We found that the 8-methoxy-2-methylquinoline moiety was a fundamental structure for its biological function, while the introduction of the bicyclic aromatic ring into the N’-methylene greatly improved its anti-tumor effect. We found that the representative compound 10E had a high affinity to Nur77. The KD values were in the low micromolar (2.25–4.10 μM), which were coincident with its IC50 values against the tumor cell lines (IC50 3.78 μM). Compound 10E could induce autophagic cell death of liver cancer cells by targeting Nur77 to mitochondria while knocking down Nur77 greatly impaired anti-tumor effect. These findings provide an insight into the structure–activity relation of Quinoline-Indole-Schiff base derivatives and further demonstrate that antitumor agents targeting Nur77 may be considered as a promising strategy for HCC therapy.
Design, synthesis, and biological evaluation of 5-((8-methoxy-2-methylquinolin-4-yl)amino)-1H-indole-2-carbohydrazide derivatives as novel Nur77 modulators
Li, Baicun,Yao, Jie,Guo, Kaiqiang,He, Fengming,Chen, Kun,Lin, Zongxin,Liu, Shunzhi,Huang, Jiangang,Wu, Qiaoqiong,Fang, Meijuan,Zeng, Jinzhang,Wu, Zhen
, (2020/07/27)
Nur77 is a potential target for the treatment of cancer such as HCC. Herein, we detailed the discovery of a novel series of 5-((8-methoxy-2-methylquinolin-4-yl)amino)-1H-indole-2-carbohydrazide derivatives as potential Nur77 modulators. The studies of antiproliferative activity and Nur77-binding affinity of target compounds resulted in the discovery of a lead candidate (10g), which was a good Nur77 binder (KD = 3.58 ± 0.16 μM) with a broad-spectrum antiproliferative activity against all tested hepatoma cells (IC50 2.0 μM) and was low toxic to normal LO2 cells. 10g could up-regulate Nur77 expression and mediate sub-cellular localization of Nur77 to induce apoptosis in hepatocellular carcinoma cell lines, which relied on 10g inducing Nur77-dependent autophagy and endoplasmic reticulum stress as the upstream of apoptosis. Moreover, the in vivo assays verified that 10g significantly inhibited xenograft tumor growth. These results indicate that 10g has the potential to be developed as a novel Nur77-targeting anti-hepatoma drug.
Synthesis of 6-methoxy-N 2,N 2,N 4,N 4,N 5,N 5-hexamethylquinoline-2,4,5-triamine - A new representative of quinoline proton sponges
Dyablo, Olga V.,Pozharskii, Alexander F.,Shmoilova, Elena A.,Savchenko, Aleksey O.
, p. 250 - 258 (2016/01/12)
[Figure not available: see fulltext.] We report the synthesis of 4-chloro-2-methyl-5-nitro- and 2,4-dichloro-5-nitroquinolines, containing methoxy groups at positions 6 and 8. The reaction of these compounds with dimethylamine solution in alcohol was shown to produce not only aminodehalogenation products, but also resulted in nucleophilic substitution of the methoxy groups. The reduction of 6-methoxy-N 2,N 2,N 4,N 4-tetramethyl-5-nitroquinoline-2,4-diamine with subsequent methylation gave 6-methoxy-N 2,N 2,N 4,N 4,N 5,N 5-hexamethylquinoline-2,4,5-triamine, a new representative of quinoline proton sponges.
Synthesis of 6-methylbenzo-[b]pyrido[3,2-f][1,6]naphthyridines from 4-chloro-2-methylquinoline
Suresh,Nandha Kumar,Mohan
, p. 778 - 781 (2007/10/03)
4-Chloro-2-methylquinolines in reaction with 3-aminopyridine yielded 4-quinolinamines, which upon cyclisation under Vilsmeier-Haak conditions afforded the title compounds. 2005 Springer Science+Business Media, Inc.
A New Series of Highly Potent Non-Peptide Bradykinin B2 Receptor Antagonists Incorporating the 4-Heteroarylquinoline Framework. Improvement of Aqueous Solubility and New Insights into Species Difference
Sawada, Yuki,Kayakiri, Hiroshi,Abe, Yoshito,Imai, Keisuke,Mizutani, Tsuyoshi,Inamura, Noriaki,Asano, Masayuki,Aramori, Ichiro,Hatori, Chie,Katayama, Akira,Oku, Teruo,Tanaka, Hirokazu
, p. 1617 - 1630 (2007/10/03)
Introduction of nitrogen-containing heteroaromatic groups at the 4-position of the quinoline moiety of our non-peptide B2 receptor antagonists resulted in enhancing binding affinities for the human B 2 receptor and reducing binding affinities for the guinea pig one, providing new structural insights into species difference. A CoMFA study focused on the diversity of the quinoline moiety afforded correlative and predictive QSAR models of binding for the human B2 receptor but not for the guinea pig one. A series of 4-(1-imidazolyl)quinoline derivatives could be dissolved in a 5% aqueous solution of citric acid up to a concentration of 10 mg/mL. A representative compound 48a inhibited the specific binding of [ 3H]BK to the cloned human B2 receptor expressed in Chinese hamster ovary cells with an IC50 value of 0.26 nM and significantly inhibited BK-induced bronchoconstriction in guinea pigs even at 1 μg/kg by intravenous administration.
Quinoline derivatives as antitubercular/antibacterial agents
Desai,Desai, Pratibha,Machhi, Dilip,Desai,Patel, Dinesh
, p. 871 - 873 (2007/10/03)
A number of quinoline derivatives of known antibacterial agents have been prepared and tested against the micro-organisms S. coli, S. paratyphi B, S. aureus and in particular against Mycobacterium tuberculosis H37-Rv. It has not been possibfe to establish correlation between antibacterial and antitubercular activities of these compounds. However, the antitubercular effect at MIC of 5 μg/mL against H37Rv shows that many modified compounds are more inhibitory than the parent agents such as 3-aminophenol, sulphamethoxazole, sulphaphenazole, sulphathiazole and monoacetyldapsone; among these the most effective are those with substituents such as 6-methyl, 6-chloro, 6-ethoxy-, or 8-methoxy functions in quinoline moiety.
