Investigating the anticarcinogenic role of salix aegyptiaca l. in colorectal carcinoma

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2009

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Enayat, Shabnam

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In this study, extracts from bark, leaves and catkins of Salix aegyptiaca L. were investigated for their antioxidant content by 2,2-diphenyl-2-picrylhydrazyl hydrate (DPPH) free radical quenching assay, total phenolic and total flavonoid assays. The highest antioxidant activity (19 ug/ml IC50 for inhibition of DPPH radical activity), total phenolic content (212 mg gallic acid equivalents/g of dried extract) and total flavonoid (479 mg catechin equivalents/g of dried extract) was observed in the ethanolic extract of bark. High performance liquid chromatography (HPLC) analyses revealed the presence of gallic acid, caffeic acid, vanillin and p-coumaric acid, myricetin, catechin, epigallocatechin gallate, rutin, quercetin as well as salicin. In addition, the anti-proliferative effects of the ethanolic extracts on colorectal cancer cell lines (HCT-116 and HT-29) were examined by an MTT cell viability assay while their apoptotic effects were assayed by acridine orange staining and caspase 3 activity. The results indicate that the ethanolic extract of bark of S. aegyptiaca can strongly inhibit cell proliferation and induces apoptosis in a dose dependent manner on both cell lines. We propose that extracts from this plant may be utilized as a source of health promoting antioxidants. Our data provide a perspective for more detailed study of biochemical pathways associated with the cancer preventive effects of active components of the extracts from S. aegyptiaca.

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Biology.

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http://etd.lib.metu.edu.tr/upload/3/12610372/index.pdf
https://hdl.handle.net/11511/18467

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

S. Enayat, “Investigating the anticarcinogenic role of salix aegyptiaca l. in colorectal carcinoma,” M.S. - Master of Science, Middle East Technical University, 2009.