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1.
J Enzyme Inhib Med Chem ; 37(1): 451-461, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-35012401

RESUMEN

Different oleanolic acid (OA) oxime ester derivatives (3a-3t) were designed and synthesised to develop inhibitors against α-glucosidase and α-amylase. All the synthesised OA derivatives were evaluated against α-glucosidase and α-amylase in vitro. Among them, compound 3a showed the highest α-glucosidase inhibition with an IC50 of 0.35 µM, which was ∼1900 times stronger than that of acarbose, meanwhile compound 3f exhibited the highest α-amylase inhibitory with an IC50 of 3.80 µM that was ∼26 times higher than that of acarbose. The inhibition kinetic studies showed that the inhibitory mechanism of compounds 3a and 3f were reversible and mixed types towards α-glucosidase and α-amylase, respectively. Molecular docking studies analysed the interaction between compound and two enzymes, respectively. Furthermore, cytotoxicity evaluation assay demonstrated a high level of safety profile of compounds 3a and 3f against 3T3-L1 and HepG2 cells.HighlightsOleanolic acid oxime ester derivatives (3a-3t) were synthesised and screened against α-glucosidase and α-amylase.Compound 3a showed the highest α-glucosidase inhibitory with IC50 of 0.35 µM.Compound 3f presented the highest α-amylase inhibitory with IC50 of 3.80 µM.Kinetic studies and in silico studies analysed the binding between compounds and α-glucosidase or α-amylase.


Asunto(s)
Inhibidores Enzimáticos/farmacología , Ésteres/farmacología , Ácido Oleanólico/farmacología , Oximas/farmacología , alfa-Amilasas/antagonistas & inhibidores , alfa-Glucosidasas/metabolismo , Relación Dosis-Respuesta a Droga , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/química , Ésteres/síntesis química , Ésteres/química , Humanos , Estructura Molecular , Ácido Oleanólico/síntesis química , Ácido Oleanólico/química , Oximas/síntesis química , Oximas/química , Relación Estructura-Actividad , alfa-Amilasas/metabolismo
2.
Eur J Med Chem ; 189: 112013, 2020 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-31972390

RESUMEN

In this study, two series of coumarin derivatives 5a∼i and 6a∼i were synthesized, and their inhibitory activity against α-glucosidase was determined. The results indicated that most of the synthesized derivatives exhibited prominent inhibitory activities against α-glucosidase. Among them, compounds 5a and 5b showed the strongest inhibition with the IC50 values of 19.64 µM and 12.98 µM, respectively. Enzyme kinetic studies of compounds 5a and 5b proved that their inhibition was reversible and a mixed type. The KI and KIS values of compound 5a were calculated to be 27.39 µM and 13.02 µM, respectively, and the corresponding values for compound 5b being 27.02 µM and 13.65 µM, respectively. The docking studies showed that compound 5b could be inserted into the active pocket of α-glucosidase and form hydrogen bonds with LYS293 to enhance the binding affinity.


Asunto(s)
Cumarinas/química , Inhibidores de Glicósido Hidrolasas/síntesis química , Inhibidores de Glicósido Hidrolasas/farmacología , alfa-Glucosidasas/química , Enlace de Hidrógeno , Cinética , Simulación del Acoplamiento Molecular , Estructura Molecular , Relación Estructura-Actividad
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