Identification of 2,6-Disubstituted 3<i>H</i>-Imidazo[4,5-<i>b</i>]pyridines as Therapeutic Agents for Dysferlinopathies through Phenotypic Screening on Patient-Derived Induced Pluripotent Stem Cells
作者:Hiroyuki Takada、Akira Kaieda、Michiko Tawada、Tomoko Nagino、Katsunori Sasa、Tatsuo Oikawa、Akiko Oki、Tomoya Sameshima、Kazumasa Miyamoto、Makoto Miyamoto、Yuko Kokubu、Ryuichi Tozawa、Hidetoshi Sakurai、Bunnai Saito
DOI:10.1021/acs.jmedchem.9b01100
日期:2019.10.24
Dysferlinopathies, which are muscular diseases caused by mutations in the dysferlin gene, remain serious medical problems due to the lack of therapeutic agents. Herein, we report the design, synthesis, and structure activity relationships of a 2,6-disubstituted 3H-imidazo[4,5-b]pyridine series, which was identified from the phenotypic screening of chemicals that increase the level of dysferlin in myocytes differentiated from patient-derived induced pluripotent stem cells (iPSCs). Optimization studies with cell-based phenotypic assay led to the identification of a highly potent compound, 19, with dysferlin elevation effects at double-digit nanomolar concentrations. In addition, the molecular target of our chemical series was identified as tubulin, through a tubulin polymerization assay and a competitive binding assay using a photoaffinity labeling probe.