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Published on: July 31, 2019
A Computational Approach Using α-Carbonic Anhydrase to Find Anti-Trypanosoma cruzi Agents
Eyra Ortiz-Perez1, Domingo Mendez-Alvarez1, Alfredo Juarez-Saldivar2
1Laboratorio de Biotecnología Farmacéutica, Centro de Biotecnología Genómica, Instituto Politécnico Nacional, Reynosa 88710, México.
Background:
Chagas disease has an ineffective drug treatment despite efforts made over the last four decades. The carbonic anhydrase of Trypanosoma cruzi (α-TcCA) has emerged as an interesting target for the design of new antiparasitic compounds due to its crucial role in parasite processes.
Objective:
The aim in this study was identify potential α-TcCA inhibitors with trypanocidal activity.
Methods:
A maximum common substructure (MCS) and molecular docking were used to carried out a ligand- and structure-based virtual screening of ZINC20 and MolPort databases. The compounds selected were evaluated in an in vitro model against the NINOA strain of Trypanosoma cruzi, and cytotoxicity was determined in a murine model of macrophage cells J774.2.
Results:
Five sulfonamide derivatives (C7, C9, C14, C19, and C21) had the highest docking scores (-6.94 to -8.31 kcal/mol). They showed key residue interactions on the active site of the α-TcCA and good biopharmaceutical and pharmacokinetic properties. C7, C9, and C21 had half-maximal inhibitory concentration (IC50) values of 26, 61.6, and 49 μM, respectively, against NINOA strain epimastigotes of Trypanosoma cruzi.
Conclusion:
Compounds C7, C9, and C21 showed trypanocidal activity; therefore, these results encourage the development of new trypanocidal agents based in their scaffold.
