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Isolation, Elucidation, and Molecular Docking Studies of Active Compounds from Phyllanthus niruri with Angiotensin-Converting Enzyme Inhibition (Similarity Check via Turnitin)

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Date
2018
Author
Ahmad, Islamudin
Mun'im, Abdul
Luliana, Sri
Elya, Berna
Azminah, Azminah
Yanuar, Arry
Artha, Yudithia
Negishi, Osamu
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Abstract
Background: Phyllanthus niruri, in Indonesia, is known as “Meniran” has a long history of use in ethnic or traditional medicine worldwide, mainly as an antihypertensive agent. Objective: The present study was designed to isolate and identify active compounds with angiotensin-converting enzyme (ACE) inhibition activity from P. niruri herb and confirm the mechanism of action, affinity, and domain specificity interactions of the isolated compounds. Materials and Methods: Some fractions of P. niruri methanolic extract were subjected to column chromatography and preparative thin-layer chromatography to get active compounds. Structural elucidation was determined via spectroscopic methods. ACE inhibition activity was measured using hippuryl-L-histidyl-L-leucine as a substrate in vitro assay. Furthermore, confirmation of the mechanism of action, affinity, and domain specificity interaction of the isolated compounds on ACE complex macromolecule (protein database id: 1O86) was performed by in silico molecular docking studies. Results: In this work, four active compounds were isolated from aerial part of P. niruri, including hypophyllantin (50% inhibition concentration [IC50] = 0.180 ?g/mL), phyllantin (IC50 = 0.140 ?g/mL), methyl gallate (IC50 = 0.015 ?g/mL), and quercetin 3-O-?-D-glucopyranosyl-(1'''-6'')-?-rhamnoside (IC50 = 0.086 ?g/mL). In silico molecular docking method emphasizes ligand-residue interactions, thereby predicting the inhibitory activity of these compounds. After docking to an ACE complex macromolecule, quercetin 3-O-?-D-glucopyranosyl-(1'''-6'')-?-rhamnoside obtained more interactions than lisinopril. Conclusion: The results were obtained from in silico and in vitro experiments and confirm the potential active compound is an ACE inhibitor and a new antihypertensive agent.
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http://repository-ds.unmul.ac.id:8080/handle/123456789/608
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Repository Universitas Mulawarman copyright ©   LP3M Universitas Mulawarman
Jalan Kuaro Kotak Pos 1068
Telp. (0541) 741118
Fax. (0541) 747479 - 732870
Samarinda 75119, Kalimantan Timur, Indonesia
Contact Us | Send Feedback