Discovery and Optimization of Small Molecule Splicing Modifiers of Survival Motor Neuron 2 as a Treatment for Spinal Muscular Atrophy
                                
                                    
                                        作者:Matthew G. Woll、Hongyan Qi、Anthony Turpoff、Nanjing Zhang、Xiaoyan Zhang、Guangming Chen、Chunshi Li、Song Huang、Tianle Yang、Young-Choon Moon、Chang-Sun Lee、Soongyu Choi、Neil G. Almstead、Nikolai A. Naryshkin、Amal Dakka、Jana Narasimhan、Vijayalakshmi Gabbeta、Ellen Welch、Xin Zhao、Nicole Risher、Josephine Sheedy、Marla Weetall、Gary M. Karp                                    
                                    
                                        DOI:10.1021/acs.jmedchem.6b00460
                                    
                                    
                                        日期:2016.7.14
                                    
                                    The underlying cause of spinal muscular atrophy (SMA) is a deficiency of the survival motor neuron (SMN) protein. Starting from hits identified in a high-throughput screening campaign and through structure activity relationship investigations, we have developed small molecules that potently shift the alternative splicing of the SMN2 exon 7, resulting in increased production of the full-length SMN mRNA and protein. Three novel chemical series, represented by compounds 9, 14, and 20, have been optimized to increase the level of SMN protein by >50% in SMA patient-derived fibroblasts at concentrations of <160 nM. Daily administration of these compounds to severe SMA Delta 7 mice results in an increased production of SMN protein in disease-relevant tissues and a significant increase in median survival time in a dose-dependent manner. Our work supports the development of an orally administered small molecule for the treatment of patients with SMA.