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

Download

index.pdf

Date

2009

Author

Enayat, Shabnam

Metadata

Show full item record

Item Usage Stats

451
views

109
downloads

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.

Subject Keywords

Biology.

URI

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

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

The effect of cysteine-43 mutation on thermostability and kinetic properties of citrate synthase from Thermoplasma acidophilum Kocabıyık, Semra; Russel, RJM; Danson, MJ; Hough, DW (Elsevier BV, 1996-07-05) In this study, we have substituted serine-43 by cysteine in the recombinant citrate synthase from a moderately thermophilic Archaeon Thermoplasma acidophilum, for site-specific attachment of labels and have investigated the effects of this mutation on the biochemical properties and thermal stability of the enzyme. Both wild-type and the mutant enzymes were purified to homogenity using affinity chromatography on Matrex Gel Red A. The mutant Thermoplasma citrate synthase is very similar to wild-type citrate s...
An alternative supporting electrolyte for enzyme immobilization in conducting polymers Kiralp, Senem; Balik, Balam; KARATAŞ, SEVİM; Toppare, Levent Kamil; Gungorb, Atilla (Elsevier BV, 2008-03-01) In this study an alternative supporting electrolyte was used in enzyme immobilization. Invertase was studied to observe the effect of the supporting electrolyte. Sulfonated poly(arylene ether sulfone) was used as the supporting electrolyte during the electrolysis of pyrrole. The results show that the polymeric supporting electrolyte can be used instead of sodium dodecyl sulfate.
Characterization of proteome alterations in Phanerochaete chrysosporium in response to lead exposure Yildirim, Volkan; ÖZCAN, Servet; Becher, Doerte; Buettner, Knut; Hecker, Michael; Özcengiz, Gülay (Springer Science and Business Media LLC, 2011-03-09) Background: Total soluble proteome alterations of white rot fungus Phanerochaete chrysosporium in response to different doses (25, 50 and 100 mu M) of Pb (II) were characterized by 2DE in combination with MALDI-TOF-MS.
Effect of drought and salt stresses on the gene expression levels of antioxidant enzymes in lentil (lens culinaris m.) seedlings Aksoy, Emre; Yücel, Ayşe Meral; Department of Biology (2008) This study was carried out for understanding of antioxidant mechanisms of lentil under abiotic stress conditions. For this aim, 14 days old lentil seedlings (Lens culinaris Medik cv. Sultan-1) were subjected to drought (20% PEG 6000), and salt (150 mM NaCl ) stress for 6, 12 and 24 hours, for 3, 5 and 7 days. PCR conditions for Mn SOD, Cu/Zn SOD, chloroplastic/mitochondrial GR, CAT and chloroplast /stromal APX antioxidant enzymes were optimized. Then, total RNA was isolated from stressed and non-stressed pl...
In vitro induction of growth and development of common juniper(Juniperus communis L.) from shoot and bud explants Koçer, Zeynep Ahsen; Kaya, Zeki; Department of Biotechnology (2005) The objective of the study was to investigate the optimum conditions for in vitro regeneration of common juniper (Juniperus communis L.) by using indirect organogenesis approach. Throughout the study; callus induction, organogenesis, improved organogenesis and root induction experiments were performed sequentially. It was found that explant position, genotype, gender, treatments and sampling time had significant effects on callus induction rate in common juniper. The results of treatments indicated that IBA...

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.