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ORIGINAL ARTICLE
Year : 2017  |  Volume : 13  |  Issue : 50  |  Page : 275-280

Phytochemical and biological evaluations of Arum hygrophilum boiss. (Araceae)


1 School of Pharmacy, The University of Jordan, Amman, Jordan
2 National Institute for Biological Sciences, Bucharest, Romania

Correspondence Address:
Fatma U Afifi
Department of Pharmaceutical Sciences, School of Pharmacy, The University of Jordan, Queen Rania Al-Abdullah Street, Amman
Jordan
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0973-1296.204551

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Background: Arum hygrophilum is a traditional medicinal plant indigenous to Jordan. The present study explores its phytochemistry, antioxidative, antidiabesity, and antiproliferative potentialities. Materials and Methods: Column chromatography and HPLC-MS analysis were used for its phytochemical evaluation. Using leaf crude water and ethanol extracts, the antioxidative capacities, their modulation of pancreatic β-cell proliferation, and insulin secretion as well as glucose diffusion and enzymatic bioassays were evaluated. Results: Three flavonoids (luteolin, isoorientin, and vitexin) and β-sitosterol have been isolated and their structures determined. HPLC-MS analysis of the ethanol extract further revealed the presence of caffeic, ferulic, gallic, and rosmarinic acids and quercetine-3-O-rhamnoside. The ethanol extract exhibited DPPH and ABTS radical scavenging and antioxidative capacities. A. hygrophilum (1), vitexin (2), and rosmarinic acid (3) inhibited pancreatic lipase (PL) dose dependently with PL-IC50 (µg/mL) values in an ascending order: (3); 51.28 ± 7.55 < (2); 260.9 ± 21.1 < (1); 1720 ± 10. Comparable to GLP-1-enhanced β-cell proliferation in 2-day treatment wells, a dose-dependent augmentation of BrdU incorporation was obtained with the A. hygrophilum aqueous extract (AE) (0.5 and 1 mg/mL, with respective 1.33- and 1.41-folds, P < 0.001). A. hygrophilum AE was identified as an inhibitor of α-amylase/α-glucosidase with IC50 value of 30.5 ± 2.1 mg/mL but lacked antiproliferative effects in colorectal cancer cell lines (HT29, HCT116, and SW620) and insulinotropic effects in β-cell line MIN6. Conclusion: A. hygrophilum extracts inhibited gastrointestinal enzymes involved in carbohydrate and lipid digestion and absorption. Abbreviations used:ABTS: 2,2'-Azino-Bis-3-Ethylbenzothiazoline-6-Sulfonic Acid, AE: Aqueous Extract, ANOVA: Analysis Of Variance, AUC: Area Under Curve, BrdU: 5-Bromo-2'-Deoxyuridine, DPPH: 2,2-Diphenyl -1-Pycriylhydrazyl, ELISA: Enzyme Linked Immunosorbent Assay, GLP1: Glucagon Like Peptide 1, GSIS: Glucose Stimulated Insulin Secretion, HPLC-MS: High Performance Liquid Chromatography-Mass Spectrometry, IC50: 50% Inhibitory Concentration, KRH: Krebs/Ringer/Hepes, MTT: 3-(4,5-Dimethylthiazol-2-Yl)-2,5-Diphenyltetrazolium Bromide, OGTT: Oral Glucose Tolerance Test, ORAC: Oxygen Radical Antioxidant Capacity, OSTT: Oral Starch Tolerance Test, PL: Pancreatic Lipase, SEM: Standard Error Of The Mean, SRB: Sulforhodamine B, TEAC: Trolox Equivalent Antioxidant Capacity, TLC: Thin Layer Chromatography


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