Induction of apoptosis in HepG2 by Vitex agnus-castus L. leaves extracts and identification of their active chemical constituents by LC-ESI-MS

Bibliographic Information
Authors: Abdel-Lateef E.E.-S.; Hammam O.A.; Mahmoud F.S.; Atta S.A.; El-Sayed M.M.; Hassenein H.I.
Journal: Asian Pacific Journal of Tropical Disease
Publisher: Elsevier B.V.
Publication Date: July 2016
Volume / Issue: Volume 6 / Issue 7
Pages: 539–548
ISSN: 22221808
DOI: 10.1016/S2222-1808(16)61084-8
Scopus: View on Scopus
Document Type: Article
Access: All Open Access; Gold Open Access
Authors and Affiliations
Abdel-Lateef E.E.-S., Laboratory of Medicinal Chemistry, Theodor Bilharz Research Institute, Kornaish El-Nile, Warrak El-Hadar 12411, Imbaba (P.O. Box 30), Giza, Egypt; Hammam O.A., Laboratory of Pathology, Theodor Bilharz Research Institute, Kornaish El-Nile, Warrak El-Hadar 12411, Imbaba (P.O. Box 30), Giza, Egypt; Mahmoud F.S., Laboratory of Immunology, Theodor Bilharz Research Institute, Kornaish El-Nile, Warrak El-Hadar 12411, Imbaba (P.O. Box 30), Giza, Egypt; Atta S.A., Laboratory of Immunology, Theodor Bilharz Research Institute, Kornaish El-Nile, Warrak El-Hadar 12411, Imbaba (P.O. Box 30), Giza, Egypt; El-Sayed M.M., Laboratory of Medicinal Chemistry, Theodor Bilharz Research Institute, Kornaish El-Nile, Warrak El-Hadar 12411, Imbaba (P.O. Box 30), Giza, Egypt; Hassenein H.I., Laboratory of Immunology, Theodor Bilharz Research Institute, Kornaish El-Nile, Warrak El-Hadar 12411, Imbaba (P.O. Box 30), Giza, Egypt
Abstract
Objective To evaluate the cytotoxic activity and cytopathological changes of Vitex agnus-castus L. (V. agnus-castus) leaves extracts and characterize their bioactive chemical constituents. Methods The dried leaves powder of V. agnus-castus was extracted using 85% methanol (MeOH). The methanolic extract was defatted using petroleum ether and fractionated using ethyl acetate (EtOAc) and butanol (BuOH). The anticancer potential of different extracts was evaluated by neutral red assay, cytopathological changes of apoptosis and caspase-3 expression in hepatoma cell line (HepG2). The chemical constituents of most active extracts were identified using liquid chromatography-electrospray ionisation mass spectrometry analysis. Results The butanolic fraction was the most active in inhibiting the proliferation of HepG2 cells [IC50 = (13.42 ± 0.17) mg/mL] compared with MeOH extract [IC50 = (17.61 ± 0.15) mg/mL) and EtOAc fraction [IC50 = (22.51 ± 0.26) mg/mL]. The cytopathological examinations demonstrated the morphology of apoptosis and caspase-3 expression was more evident in HepG2 cells treated with BuOH than cells treated with MeOH and EtOAc. The liquid chromatography-electrospray ionisation mass spectrometry analysis exhibited that the defatted MeOH extract and BuOH fraction had different bioactive secondary metabolites, such as phenolic acids, flavonoids, and iridoids. Conclusions The butanolic fraction has higher contents of secondary metabolites than the defatted methanolic extract. The cytotoxic activities, apoptotic changes, and caspase-3 activation may be due to the presence of these bioactive secondary metabolites (iridoids, flavonoid, and phenolic acids) in these extracts. These results would suggest V. agnus-castus to be used as an adjuvant in cancer therapy. © 2016 Asian Pacific Tropical Medicine Press
Keywords
Apoptosis; Caspase-3; Flavonoids; HepG2 cell line; Iridoids; LC-ESI-MS; Phenolic acids; Vitex agnus-castus L.; 1,3 di o caffeoylquinic acid; 1,3 di o caffeoylquinic acid o hexoside; 4 hydroxybenzoic acid; 4 hydroxybenzoic acid o hexosylrhamnoside; 4,5 di o caffeoylquinic acid I; acetic acid ethyl ester; agnuside; butanol; caffeic acid hexoside; caspase 3; ferulic acid; flavonoid; iridoid; kaempferol; luteolin o hexoside; methanol; negundoside I; negundoside II; negundoside III; neochlorogenic acid; oleic acid; orientin; phenol derivative; quinic acid; quinic acid derivative; rosmarinic acid di o hexoside; taxifolin di o hexoside; unclassified drug; unindexed drug; Vitex agnus castus extract; vitexin; antineoplastic activity; antiproliferative activity; Article; cancer inhibition; cell proliferation; controlled study; cytopathology; drug cytotoxicity; drug identification; electrospray mass spectrometry; enzyme activation; human; human cell; IC50; liquid chromatography; liver cell carcinoma; plant leaf; priority journal; protein expression; solvent extraction
Citation Information
Scopus Citations: 12
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