Synthesis, biological evaluation and molecular modeling of imidazo[1,2-a]pyridine derivatives as potent antitubulin agents. 2017

Jin Liu, and Daiying Zuo, and Tongfei Jing, and Ming Guo, and Lingyun Xing, and Wenyu Zhang, and Jianwen Zhao, and Jiwei Shen, and Ping Gong, and Dajun Zhang, and Xin Zhai
Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, PR China.

Two series of novel 5,7-diarylimidazo[1,2-a]pyridine-8-carbonitrile derivatives (3a-3q and 7a-7n) were designed by modification of CA-4 pharmacophore to develop colchicine targeted antitubulin agents. All compounds were efficiently synthesized and evaluated for their cytotoxicity against five selected cancer cell lines (HT-29, H460, A549, MKN-45 and SMMC-7721) which got an insight in structure and activity relationships (SARs). Several molecules (7e, 7f, 7h-7j and 7m) were disclosed to exhibit promising antiproliferative activity with IC50 values in double-digit nanomolar degree. Optimization toward these compounds led to the discovery of a promising lead 7e, which showed noteworthy potency with IC50 value ranging from 0.01 to 3.2µM superior to CA-4 and Crolibulin. Importantly, immunofluorescence staining and colchcine competitive binding assay revealed that microtubule dynamics was disrupted by 7e by binding at the colchicine site of tubulin. Moreover, molecular docking studies suggested the binding of this mimic at colchcine-binding site is similar to Crolibulin, as was in conformity with the observed SARs for these compounds.

UI MeSH Term Description Entries
D008958 Models, Molecular Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures. Molecular Models,Model, Molecular,Molecular Model
D011725 Pyridines Compounds with a six membered aromatic ring containing NITROGEN. The saturated version is PIPERIDINES.
D005455 Fluorescent Antibody Technique Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy. Antinuclear Antibody Test, Fluorescent,Coon's Technique,Fluorescent Antinuclear Antibody Test,Fluorescent Protein Tracing,Immunofluorescence Technique,Coon's Technic,Fluorescent Antibody Technic,Immunofluorescence,Immunofluorescence Technic,Antibody Technic, Fluorescent,Antibody Technics, Fluorescent,Antibody Technique, Fluorescent,Antibody Techniques, Fluorescent,Coon Technic,Coon Technique,Coons Technic,Coons Technique,Fluorescent Antibody Technics,Fluorescent Antibody Techniques,Fluorescent Protein Tracings,Immunofluorescence Technics,Immunofluorescence Techniques,Protein Tracing, Fluorescent,Protein Tracings, Fluorescent,Technic, Coon's,Technic, Fluorescent Antibody,Technic, Immunofluorescence,Technics, Fluorescent Antibody,Technics, Immunofluorescence,Technique, Coon's,Technique, Fluorescent Antibody,Technique, Immunofluorescence,Techniques, Fluorescent Antibody,Techniques, Immunofluorescence,Tracing, Fluorescent Protein,Tracings, Fluorescent Protein
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013329 Structure-Activity Relationship The relationship between the chemical structure of a compound and its biological or pharmacological activity. Compounds are often classed together because they have structural characteristics in common including shape, size, stereochemical arrangement, and distribution of functional groups. Relationship, Structure-Activity,Relationships, Structure-Activity,Structure Activity Relationship,Structure-Activity Relationships
D050257 Tubulin Modulators Agents that interact with TUBULIN to inhibit or promote polymerization of MICROTUBULES. Microtubule Modulator,Tubulin Inhibitor,Tubulin Modulator,Tubulin Polymerization Inhibitor,Tubulin Polymerization Promoter,Tubulin Promoter,Microtubule Modulators,Tubulin Inhibitors,Tubulin Polymerization Inhibitors,Tubulin Polymerization Promoters,Tubulin Promoters,Inhibitor, Tubulin,Inhibitor, Tubulin Polymerization,Inhibitors, Tubulin,Inhibitors, Tubulin Polymerization,Modulator, Microtubule,Modulator, Tubulin,Modulators, Microtubule,Modulators, Tubulin,Polymerization Inhibitor, Tubulin,Polymerization Inhibitors, Tubulin,Polymerization Promoter, Tubulin,Polymerization Promoters, Tubulin,Promoter, Tubulin,Promoter, Tubulin Polymerization,Promoters, Tubulin,Promoters, Tubulin Polymerization
D019073 HT29 Cells Human colonic ADENOCARCINOMA cells that are able to express differentiation features characteristic of mature intestinal cells such as the GOBLET CELLS. HT-29 Cells,Cell, HT-29,Cell, HT29,Cells, HT-29,Cells, HT29,HT 29 Cells,HT-29 Cell,HT29 Cell
D021241 Spectrometry, Mass, Electrospray Ionization A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry. ESI Mass Spectrometry,Electrospray Ionization Mass Spectrometry,Mass Spectrometry, ESI,Spectrometry, ESI Mass
D066244 Proton Magnetic Resonance Spectroscopy Spectroscopy technique which measures changes in organic compounds by tracking the spectral energy of absorption of HYDROGEN atoms. 1H NMR,1H-MRS,1H-NMR

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