Development of novel benzimidazole-derived neddylation inhibitors for suppressing tumor growth in vitro and in vivo

Ubiquitin-like protein neddylation is overactivated in various human cancers and correlates with disease progression, and targeting this pathway represents a valuable therapeutic strategy. Our previous work disclosed an antihypertensive agent, candesartan cilexetic (CDC), serves as a novel neddylation inhibitor for suppressing tumor growth by targeting Nedd8-activating enzyme (NAE). In this study, 42 benzimidazole derivatives were designed and synthesized based on lead compound CDC to improve the neddylation inhibition and anticancer efficacy. Optimal benzimidazole-derived 35 displayed superior neddylation inhibition in enzyme assay compared to CDC (IC50 = 5.51 mu M vs 16.43 mu M), along with promising target inhibitory activity and killing selectivity in cancer cell. The results of cellular mechanism research combined with tumor growth suppression in human lung cancer cell A549 in vivo, accompanied with docking model, revealed that 35 has the potential to be developed as a promising neddylation inhibitor for anticancer therapy. (C) 2020 Elsevier Masson SAS. All rights reserved.

Automated summary

The study designed and synthesized 42 benzimidazole derivatives, with optimized compound 35 displaying superior neddylation inhibition and promising selective killing activity in cancer cells, along with potential for tumor growth suppression in human lung cancer cells in vivo.