Molecules (2021)
Update date:2022-08-11
Topics:
Cortés-Benítez, Francisco
De-La-cruz-martínez, Ledy
Duran-Becerra, Constanza
Espinosa-Chávez, Julio
Germán-Acacio, Juan Manuel
González-Andrade, Martin
Páez-Franco, José C.
Pérez-Villanueva, Jaime
Palacios-Espinosa, Juan Francisco
Soria-Arteche, Olivia
Torres-Valencia, J. Martin
Regulating insulin and leptin levels using a protein tyrosine phosphatase 1B (PTP1B) inhibitor is an attractive strategy to treat diabetes and obesity. Glycyrrhetinic acid (GA), a triter-penoid, may weakly inhibit this enzyme. Nonetheless, semisynthetic derivatives of GA have not been developed as PTP1B inhibitors to date. Herein we describe the synthesis and evaluation of two series of indole-and N-phenylpyrazole-GA derivatives (4a–f and 5a–f). We measured their inhibitory activity and enzyme kinetics against PTP1B using p-nitrophenylphosphate (pNPP) assay. GA derivatives bearing substituted indoles or N-phenylpyrazoles fused to their A-ring showed a 50% inhibitory concentration for PTP1B in a range from 2.5 to 10.1 μM. The trifluo-romethyl derivative of indole-GA (4f) exhibited non-competitive inhibition of PTP1B as well as higher potency (IC50 = 2.5 μM) than that of positive controls ursolic acid (IC50 = 5.6 μM), claramine (IC50 = 13.7 μM) and suramin (IC50 = 4.1 μM). Finally, docking and molecular dynamics simulations provided the theoretical basis for the favorable activity of the designed compounds.
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