2. Academic Validation
  3. Isoform selectivities of novel 4-hydroxycoumarin imines as inhibitors of myosin II

Isoform selectivities of novel 4-hydroxycoumarin imines as inhibitors of myosin II

  • Eur J Med Chem. 2022 Dec 12;247:115008. doi: 10.1016/j.ejmech.2022.115008.
Joshua D Smith 1,  Jhonnathan Brawley 2,  Kate C Bordenave 1,  Ryan K Olsen 2,  Amarawan Intasiri 2,  Christine R Cremo 3,  Thomas W Bell 4
Affiliations

Affiliations

  • 1 Department of Pharmacology, University of Nevada, School of Medicine, Reno, NV, 89557-0318, USA.
  • 2 Department of Chemistry, University of Nevada, Reno, NV, 89557-0216, USA.
  • 3 Department of Pharmacology, University of Nevada, School of Medicine, Reno, NV, 89557-0318, USA. Electronic address: cremo@unr.edu.
  • 4 Department of Chemistry, University of Nevada, Reno, NV, 89557-0216, USA. Electronic address: twb@unr.edu.
PMID: 36543032 DOI: 10.1016/j.ejmech.2022.115008
Abstract

Muscle Myosin inhibition could be used to treat many medical conditions involving hypercontractile states, including muscle spasticity, chronic musculoskeletal pain, and hypertrophic cardiomyopathy. A series of 13 advanced analogs of 3-(N-butylethanimidoyl)ethyl)-4-hydroxy-2H-chromen-2-one (BHC) were synthesized to explore extended imine nitrogen side chains and compare aldimines vs. ketimines. None of the new analogs inhibit nonmuscle Myosin in a cytokinesis assay. ATPase structure-activity relationships reveal that selectivity for cardiac vs. skeletal Myosin can be tuned with subtle structural changes. None of the compounds inhibited smooth muscle Myosin II. Docking the compounds to homology models of cardiac and skeletal Myosin II gave rationales for the effects of side arm length on inhibition selectivity and for cardiac vs. skeletal Myosin. Properties including solubility, stability and toxicity, suggest that certain BHC analogs may be useful as candidates for preclinical studies or as lead compounds for advanced candidates for drugs with cardiac or skeletal muscle Myosin selectivity.

Keywords

Docking; Homology model; Hydroxyquinoline imine; Myosin inhibitor; Selectivity; Structure-activity relationships.

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