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Bioassay-guided isolation, identification of compounds from Origanum rotundifolium and investigation of their antiproliferative and antioxidant activities

Context: Origanum (Lamiaceae) has been used in food and pharmaceutical industries. Objective: Isolation and identification of bioactive compounds from Origanum rotundifolium Boiss. and investigation of their antiproliferative and antioxidant activities. Materials and methods: The aerial part of O. r...

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Published in:Pharmaceutical biology 2017, Vol.55 (1), p.1646-1653
Main Authors: Erenler, Ramazan, Meral, Bilal, Sen, Ozkan, Elmastas, Mahfuz, Aydin, Ali, Eminagaoglu, Ozgur, Topcu, Gulacti
Format: Article
Language:English
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Summary:Context: Origanum (Lamiaceae) has been used in food and pharmaceutical industries. Objective: Isolation and identification of bioactive compounds from Origanum rotundifolium Boiss. and investigation of their antiproliferative and antioxidant activities. Materials and methods: The aerial part of O. rotundifolium was dried and powdered (1.0 kg ±2.0 g) then extracted with hexane, ethyl acetate, methanol and water. Solvent (3 × 1 L) was used for each extraction for a week at room temperature. The aqueous extract was partitioned with ethyl acetate (3 × 1 L) to yield the water/EtOAc extract subjected to chromatography to isolate the active compounds. The structures of isolated compounds were elucidated by 1 D, 2 D NMR and LC-TOF/MS. Results: Apigenin (1), ferulic acid (2), vitexin (3), caprolactam (4), rosmarinic acid (5), and globoidnan A (6) were isolated and identified. Globoidnan A (6), vitexin (3), and rosmarinic acid (5) revealed the excellent DPPH * scavenging effect with IC 50 values of 22.4, 31.4, 47.2 μM, respectively. Vitexin (3) (IC 50 3.6), globoidnan A (6) (IC 50 4.6), apigenin (1) (IC 50 8.9) and ferulic acid (2) exhibited more ABTS *+ activity than standard Trolox (IC 50 13.8 μg/mL). Vitexin (3) revealed the most antiproliferative activity against HeLa, HT29, C6 and Vero cells lines with IC 50 values of 35.6, 32.5, 41.6, 46.7 (μM), respectively. Discussion and conclusion: Globoidnan A (6) has the most antioxidant effects on all assays. This has to do with the chemical structure of the compound bearing the acidic protons. Vitexin (3) could be a promising anticancer agent.
ISSN:1388-0209
1744-5116
DOI:10.1080/13880209.2017.1310906