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  • Title: Antiproliferative activity against human tumor cell lines and toxicity test on Mediterranean dietary plants.
    Author: Conforti F, Ioele G, Statti GA, Marrelli M, Ragno G, Menichini F.
    Journal: Food Chem Toxicol; 2008 Oct; 46(10):3325-32. PubMed ID: 18768152.
    Abstract:
    Sixteen edible plants from Southern Italy were evaluated for their in vitro antiproliferative properties, using the sulforodamine B (SRB) assay, on four human cancer cell lines: breast cancer MCF-7, prostate cancer LNCaP, amelanotic melanoma C32 and renal adenocarcinoma ACHN. After 48 h of incubation the most antiproliferative plant extract was Cynara cardunculus ssp. cardunculus on C32 and ACHN cell lines with IC(50) of 21 and 18 microg/ml, respectively. Mentha aquatica showed a selective antiproliferative activity on breast cancer while significant activity was exerted by Cichorium intybus on melanoma. These species contained the highest amount of phenolics. The acute toxicity of the hydroalcohol extracts from all the plants were evaluated by using the Microtox acute toxicity test. This bacterial test measures the decrease in light emission from the marine luminescent Vibrio fischeri bacteria when exposed to organic extracts. This inhibition test was revealed to be highly sensitive, cost effective and easy to operate, requiring just 15 min to predict the sample toxicity. All the extracts analyzed resulted to give values very less than a limit of 20% value, demonstrating so an irrelevant toxicity for the human health. In contrast, Echium vulgare and Malva sylvestris showed bioluminescence inhibition values of 19.42% and 17.32%, respectively, just under the established limit.
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