Development of New Inhibitors of HDAC1–3 Enzymes Aided by In Silico Design Strategies
journal contributionposted on 2022-04-25, 21:05 authored by Narges Cheshmazar, Salar Hemmati, Maryam Hamzeh-Mivehroud, Babak Sokouti, Matthes Zessin, Mike Schutkowski, Wolfgang Sippl, Hojjatollah Nozad Charoudeh, Siavoush Dastmalchi
Histone deacetylases (HDACs) are overexpressed in cancer, and their inhibition shows promising results in cancer therapy. In particular, selective class I HDAC inhibitors such as entinostat are proposed to be more beneficial in breast cancer treatment. Computational drug design is an inevitable part of today’s drug discovery projects because of its unequivocal role in saving time and cost. Using three HDAC inhibitors trichostatin, vorinostat, and entinostat as template structures and a diverse fragment library, all synthetically accessible compounds thereof (∼3200) were generated virtually and filtered based on similarity against the templates and PAINS removal. The 298 selected structures were docked into the active site of HDAC I and ranked using a calculated binding affinity. Top-ranking structures were inspected manually, and, considering the ease of synthesis and drug-likeness, two new structures (3a and 3b) were proposed for synthesis and biological evaluation. The synthesized compounds were purified to a degree of more than 95% and structurally verified using various methods. The designed compounds 3a and 3b showed 65–80 and 5% inhibition on HDAC 1, 2, and 3 isoforms at a concentration of 10 μM, respectively. The novel compound 3a may be used as a lead structure for designing new HDAC inhibitors.
diverse fragment librarycalculated binding affinity298 selected structuresdrug discovery projectscomputational drug designtwo new structuresbreast cancer treatmentdesigned compounds 3atemplate structuressynthesized compoundsranking structuresnew inhibitorsunequivocal roletoday ’silico selective classsaving timeranked usingpains removallead structureinspected manuallyinevitable partgenerated virtuallyfiltered basedcancer therapybiological evaluationactive site3 isoforms10 μm