Phytochemical Profiling, GC-MS Analysis and α-Amylase Inhibitory Potential of Ethanolic Extract of Cocos nucifera Linn. Endocarp

Author(s): Rajeev Kumar Singla, Ashok Kumar Dubey*.

Journal Name: Endocrine, Metabolic & Immune Disorders - Drug Targets
(Formerly Current Drug Targets - Immune, Endocrine & Metabolic Disorders)

Volume 19 , Issue 4 , 2019

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Graphical Abstract:


Background: Drugs with post-prandial action constitute one of the main courses of treatments for diabetes.

Objective: In the present investigation, we have explored the α-amylase inhibitory potential of ethanolic extract of Cocos nucifera endocarp.

Methods: DNS based assay was done to assess the α-amylase inhibition potential of ethanolic extract. Phytochemical screening and GC-MS analysis were done in order to assess the chemical profiling of extract. In silico docking studies were done using VLife MDS 4.6 software and the probable molecules, predicted after GC-MS analysis, were docked with the co-crystallized (acarbose) tracked active site and rest all cavities of porcine pancreatic α-amylase (1OSE). ADMET analysis was done using StarDrop 6.4, Derek Nexus and P450 Modules from Optibrium Ltd. and LHASA Ltd.

Results: DNS based α-amylase assay indicated that the IC50 value of extract lies in the range of 63- 126 µg/ml and at higher doses, i.e. above 250 µg/ml, it has better α-amylase inhibition than the standard drug, acarbose. Phytochemical screening indicated that ethanolic extract is rich in alkaloids, tannins, flavonoids, saponins, triterpenes, glycosides, carbohydrates, terpenoids, quinones and lactones. Further, GC-MS analysis (where Similarity Index was > 90) predicted that the probable phytoconstituents present in the ethanolic extract are myristic acid, syringaldehyde, eugenol, vanillin, 2,4-di-tert-butylphenol, lauric acid, palmitic acid methyl ester and γ-sitosterol. γ-Sitosterol showed the strong affinity towards the active site which was tracked by a co-crystallized ligand along with cavity 1 and 2 while significant interactions were observed in case of co-crystallized tracked active site as well as cavity 4 of 1OSE. Ethanolic extract of C. nucifera has no hemolytic effect.

Conclusion: Its ability to effectively inhibit α-amylase may be attributed to the presence of the above probable molecules, which will be explored further.

Keywords: Coconut, hard shell, antidiabetic, hypoglycaemic activity, medicinal plant, ADMET studies.

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Year: 2019
Page: [419 - 442]
Pages: 24
DOI: 10.2174/1871530319666181128100206
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