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ORIGINAL ARTICLE
Year : 2018  |  Volume : 14  |  Issue : 57  |  Page : 304-310

Flavonoid and Phenolic Compounds from Carissa macrocarpa: Molecular Docking and Cytotoxicity Studies


1 Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia; Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
2 Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia; Department of Pharmacognosy, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
3 Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Saudi Arabia; Department of Pharmacology, Faculty of Medicine, Minia University, Minia, Egypt
4 Department of Physiology, Biochemistry and Pharmacology, College of Veterinary Medicine, King Faisal University, Al-Ahsa, Saudi Arabia; Department of Pharmacology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh, Egypt

Correspondence Address:
Hany E Khalil
Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982

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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/pm.pm_104_18

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Objective: The objective of the study is to investigate the phytochemical contents of the methanol extract of leaves of Carissa macrocarpa, the possible anticancer activities of the isolated compounds through molecular docking approaches as well as the potential cytotoxic activity. Materials and Methods: The methanol extract of the plant was subjected to several chromatographic procedures. In silico studies of the isolated compounds against four anticancer target kinases, namely, protein kinase B (PKB/AKT), phosphatidylinositol 3-kinase, protein kinase C, and rapidly accelerated fibrosarcoma kinase were performed. Potential cytotoxic activity of the isolated compounds was determined by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide assay against A549 cells. Results: Phytochemical investigation led to the isolation of three known flavonoid compounds: kaempferol 3-O-robinobioside (1), Kaempferol-3-O-α-L-rhamnopyranosyl (1-6)(4``-p-coumaroyl)β-D-galactopyranoside7-O-α-L-rhamnopyranoside (2), and variabiloside E (3) as well as three phenolic compounds: p-coumaric acid (4), salicin (5), and 3,4-dimethylphenol β-gentiobioside (6). In silico studies revealed that three out of the six compounds were strongly bound with one or more of the targets enzymes. Compound 3 showed broad-spectrum binding with the four targets with high docking score. Compounds 1–3 showed IC50comparable to that of positive control, doxorubicin. The rest of the compounds 4–6 showed relatively discrete IC50. Conclusion: The isolated compounds were reported for the first time from this plant. Compounds 1–3 could serve as lead compounds for development of new anticancer drugs. Abbreviation used: PKB/AKT: Protein kinase B; PI3K: Phosphatidylinositol 3-kinase; PKC: Protein kinase C; RAFK: Rapidly accelerated fibrosarcoma kinase; 1H- and 13C-NMR: Proton and carbon-13 nuclear magnetic resonance; SCC: Silica gel column chromatography; RPCC: Reversed-phase silica gel column chromatography; TLC: Thin-layer chromatography; MVD: Molegro Virtual Docker; DMEM: Dulbecco's Modified Eagle's Medium; FBS: Fetal bovine serum; MTT: 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl- 2H-tetrazolium bromide; DMSO: Dimethyl sulfoxide.


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