α-Glucosidase Inhibition Activity of Stem Bark Ceiba pentandra Linn. In Vitro and In Silico
Ceiba pentandra (L.) stem bark plant contains tannin, flavonoid, alkaloid, terpenoid, and saponin compounds. It is known that flavonoid compounds have a potential for inhibition activity of an α-glucosidase enzyme. The purpose of this research is to know the α-glucosidase inhibition activity of the fraction of n-hexane, ethyl acetate, and water. These three fractions measured α-glucosidase inhibition activity by spectrophotometric UV-vis method. The fraction extract with IC50 values can best be done an analysis of active compounds using LCMS/MS methods, and results of the suspected compound do the binding molecule with a receptor model isomaltase α-glucosidase uses AutoDock Vina so that bond can predict drug active compounds. The results of this research activity are inhibition of α-glucosidase stem bark in the fraction of n-hexane 4,60 μg/mL, ethyl acetate fraction 8,55 μg/mL and fractions of the water 5,61 μg/mL. Analysis of the compound fraction of water by LCMS/MS eluted at the retention time 3,61 seconds allegedly derivative compounds (+) catechin and on retention time 8,70 minutes allegedly derivative compounds vavain. Vavain derivative compounds, (+) catechin, acarbose and quercetin each has its own docking score of -8,1; -8,8; -6,2 and -7,6 kcal/mol and has a semblance of bonding on amino acid Glu276 which is a residue catalytic role in hydrolysis reactions. Equality on the sides of active chemical bonds is expected to have the same activity as drug inhibition of the enzyme α-glucosidase.
Syihabudin, V., Sari, B., L., Utami, N., F. 2018. α-Glucosidase Inhibition Activity of Stem Bark Ceiba pentandra Linn. In Vitro and In Silico.
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