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1.
J Med Chem ; 60(13): 5586-5598, 2017 07 13.
Artículo en Inglés | MEDLINE | ID: mdl-28653846

RESUMEN

7-Methoxy-4-(2-methylquinazolin-4-yl)-3,4-dihydroquinoxalin-2(1H)-one (2), a promising anticancer lead previously identified by us, inhibited tumor growth by 62% in mice at 1.0 mg/kg without obvious signs of toxicity. Moreover, compound 2 exhibited extremely high antiproliferative activity in the NIH-NCI 60 human tumor cell line panel, with low to sub-nanomolar GI50 values (10-10 M level). It also showed a suitable balance between aqueous solubility and lipophilicity, as well as moderate metabolic stability in vivo. Mechanistic studies using Mayer's hematoxylin and eosin and immunohistochemistry protocols on xenograft tumor tissues showed that 2 inhibited tumor cell proliferation, induced apoptosis, and disrupted tumor vasculature. Moreover, evaluation of new synthetic analogues (6a-6t) of 2 indicated that appropriate 2-substitution on the quinazoline ring could enhance antitumor activity and improve druglike properties. Compound 2 and its analogues with a 4-(2-methylquinazolin-4-yl)-3,4-dihydroquinoxalin-2(1H)-one scaffold thus represent a novel class of tubulin-binding tumor-vascular disrupting agents (tumor-VDAs) that target established blood vessels in tumors.


Asunto(s)
Inhibidores de la Angiogénesis/química , Inhibidores de la Angiogénesis/uso terapéutico , Antineoplásicos/química , Antineoplásicos/uso terapéutico , Quinazolinas/química , Quinazolinas/uso terapéutico , Inhibidores de la Angiogénesis/farmacología , Animales , Antineoplásicos/farmacología , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Humanos , Ratones Desnudos , Simulación del Acoplamiento Molecular , Neoplasias/irrigación sanguínea , Neoplasias/tratamiento farmacológico , Neoplasias/metabolismo , Quinazolinas/farmacología , Tubulina (Proteína)/metabolismo , Moduladores de Tubulina/química , Moduladores de Tubulina/farmacología , Moduladores de Tubulina/uso terapéutico
3.
Bioorg Med Chem ; 24(13): 3083-3092, 2016 07 01.
Artículo en Inglés | MEDLINE | ID: mdl-27238842

RESUMEN

Current results identified 4-substituted 2-phenylaminoquinazoline compounds as novel Mer tyrosine kinase (Mer TK) inhibitors with a new scaffold. Twenty-one 2,4-disubstituted quinazolines (series 4-7) were designed, synthesized, and evaluated against Mer TK and a panel of human tumor cell lines aimed at exploring new Mer TK inhibitors as novel potential antitumor agents. A new lead, 4b, was discovered with a good balance between high potency (IC50 0.68µM) in the Mer TK assay and antiproliferative activity against MV4-11 (GI50 8.54µM), as well as other human tumor cell lines (GI50<20µM), and a desirable druglike property profile with low logP value (2.54) and high aqueous solubility (95.6µg/mL). Molecular modeling elucidated an expected binding mode of 4b with Mer TK and necessary interactions between them, thus supporting the hypothesis that Mer TK might be a biologic target of this kind of new active compound.


Asunto(s)
Proteínas Tirosina Quinasas/antagonistas & inhibidores , Quinazolinas/síntesis química , Quinazolinas/farmacología , Antineoplásicos/síntesis química , Antineoplásicos/química , Antineoplásicos/farmacología , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Fenómenos Químicos , Activación Enzimática/efectos de los fármacos , Humanos , Concentración 50 Inhibidora , Modelos Moleculares , Inhibidores de Proteínas Quinasas/síntesis química , Inhibidores de Proteínas Quinasas/química , Inhibidores de Proteínas Quinasas/farmacología , Quinazolinas/química
4.
Bioorg Med Chem ; 23(17): 5740-7, 2015 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-26242242

RESUMEN

Thirteen new N-aryl 1,2,3,4-tetrahydroquinoline compounds (4a-f, 6a-c, and 8a-d) were synthesized and evaluated for antitumor activity and drug-like properties. Compound 4a exhibited high inhibitory potency with low nanomolar GI50 values of 16-20 nM in cellular assays, including excellent activity against the P-glycoprotein overexpressing cell line KBvin. Compound 4a inhibited colchicine binding to tubulin and tubulin assembly with an IC50 value of 0.85 µM, superior to the reference compound CA4 (1.2 µM) in the same assay. In addition, 4a also exhibited highly improved water solubility (75 µg/mL) and a suitable logP value (3.43) at pH 7.4. With a good balance between antitumor potency and drug-like properties, compound 4a could be a new potential drug candidate for further development. Current results on SAR studies and molecular modeling provided more insight about this class of compounds as tubulin polymerization inhibitors targeting the colchicine site.


Asunto(s)
Quinolinas/química , Quinolinas/farmacología , Moduladores de Tubulina/química , Moduladores de Tubulina/farmacología , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Modelos Moleculares , Relación Estructura-Actividad
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