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  • Multi-target-directed ligan...
    Reis, Joana; Cagide, Fernando; Valencia, Martín Estrada; Teixeira, José; Bagetta, Donatella; Pérez, Concepción; Uriarte, Eugenio; Oliveira, Paulo J.; Ortuso, Francesco; Alcaro, Stefano; Rodríguez-Franco, María Isabel; Borges, Fernanda

    European journal of medicinal chemistry, 10/2018, Volume: 158
    Journal Article

    There has been a substantial research effort to design multi-target ligands for the treatment of Alzheimer's disease (AD), an approach that is moved by the knowledge that AD is a complex and multifactorial disease affecting many linked to pathological pathways. Accordingly, we have devoted efforts to develop multi-target ligands based on the chromone scaffold. As a result, a small library of chromone derivatives was synthesized and screened towards human cholinesterases and monoamine oxidases. Compounds 2-(dimethylamino)ethyl (E)-3-(4-oxo-2-(p-methylphenlcarbamoyl)-4H-chromen-6-yl)acrylate (9a) and 2-(dimethylamino)ethyl (E)-3-(4-oxo-3-(phenylcarbamoyl)-4H-chromen-6-yl)acrylate (23a) were identified as the most promising multi-target inhibitors of the series. Compound 9a acted as a potent, selective and bifunctional AChEI (IC50 = 0.21 μM, Ki = 0.19 μM) and displayed dual hMAO inhibitory activity (hMAO-A IC50 = 0.94 μM, Ki = 0.057 μM and hMAO-B IC50 = 3.81 μM, Ki = 0.48 μM). Compound 23a acted as a selective IMAO-B (IC50 = 0.63 μM, Ki = 0.34 μM) while still displaying hChE inhibitory and bifunctional activity in the low micromolar range. Overall, these two compounds stand out as reversible multi-target inhibitors with favourable permeability, toxicological and drug-like profiles, thus being valid candidates for subsequent optimization and pre-clinical studies. Display omitted •Successfully BBB permeable chromone-based multi-target compounds targeting human ChEs and MAOs were developed.•Compound 9a acted as a bifunctional hAChE inibitor also possessing dual hMAO inhibitory activity.•Compound 23a acted as a selective hMAO-B inhibitor displaying hChE inhibitory activity in the low micromolar range.•Compounds showed limited cytotoxicity in differentiated SH-SY5Y and HepG2 cells.