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Int. J. Mol. Sci. 2011, 12(7), 4190-4205; doi:10.3390/ijms12074190
Article

Teucrium Plant Species as Natural Sources of Novel Anticancer Compounds: Antiproliferative, Proapoptotic and Antioxidant Properties

1,* , 1
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1 Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Str. Radoja Domanovića No. 12, 34000 Kragujevac, Republic of Serbia 2 Department of Chemistry, Faculty of Science, University of Kragujevac, Str. Radoja Domanovića No. 12, 34000 Kragujevac, Republic of Serbia
* Author to whom correspondence should be addressed.
Received: 11 April 2011 / Revised: 3 June 2011 / Accepted: 14 June 2011 / Published: 27 June 2011
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
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Abstract

This study deals with total phenolic content, antiproliferative and proapoptotic activity of methanolic extracts from different Teucrium species and the effect on the prooxidant/antioxidant status in HCT-116 cells. The total phenolic content of the extracts was measured spectrophotometricaly and the obtained results ranged from 56.62 mg/g to 172.50 mg GA/g. The antiproliferative activity of methanolic extracts from different Teucrium species was determined using MTT cell viability assay, where IC50 value was used as a parameter for cytotoxicity. The type of cell death was explored by fluorescence microscopy using the acridin orange/ethidium bromide method. MTT assay showed that all extracts significantly reduced cell viability in a dose-dependent manner, with very low IC50 values. The highest content of phenolic compounds and the best cytotoxic activity on HCT-116 cells after 24 h of exposure was in T. chamaedrys extract, with IC50 values of 5.48 × 10−9 µg/mL. After 72 h, methanolic extract of T. arduini appeared to have the best cytotoxic activity on HCT-116, with IC50 values of 0.37 µg/mL. Treatments caused typical apoptotic morphological changes in HCT-116 cells and showed a high percentage of apoptotic cells. The results of the presented research indicate that some Teucrium extracts are a very rich source of phenols, which may directly contribute to high antiproliferative and proapoptotic activity.
Keywords: acridin orange/ethidium bromide assay; antiprolifertative activity; antioxidants; MTT assay; phenols; Teucrium acridin orange/ethidium bromide assay; antiprolifertative activity; antioxidants; MTT assay; phenols; Teucrium
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Stankovic, M.S.; Curcic, M.G.; Zizic, J.B.; Topuzovic, M.D.; Solujic, S.R.; Markovic, S.D. Teucrium Plant Species as Natural Sources of Novel Anticancer Compounds: Antiproliferative, Proapoptotic and Antioxidant Properties. Int. J. Mol. Sci. 2011, 12, 4190-4205.

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