Anthocyanins extracted from Chinese blueberry (Vaccinium uliginosum L.) and its anticancer effects on DLD-1 and COLO205 cells
- Author:
- No author available
- Journal Title:
- CHINESE MEDICAL JOURNAL
- Issue:
- 19
- DOI:
- 10.3760/cma.j.issn.0366-6999.2010.19.018
- Key Word:
- vaccinium uliginosum;anthocyanin extraction;cancer cell suppression
Abstract： Background Vaccinium uliginosum L. is a type of blueberry found in the Chinese Changbai Mountains. We extracted Vaccinium uliginosurn Anthocyanins (Av.uli) to investigate its bioactivity on suppressing cancer cells.Methods Av.uli was extracted under different conditions of temperature (10℃-35℃), pH 1.0-3.0, and diatomaceous earth (1.0 g-3.0 g), followed by a HPLC analysis for the determination of the ingredients. Its anticancer bioactivities on human colon and colorectal cancer cells (DLD-1 and COLO205) were compared with those on Lonicera caerulea Anthocyanins (AL.cae) and Vaccinium myrtillus Anthocyanins (Av.myr), using cell viability assays, DNA electrophoresis and nuclear morphology assays.Results The optimum process of Av.uliextraction involved conditions of temperature 20℃, pH 2.0, and diatomaceous earth 1.0 g/50 g of fruit weight. Av.uli contained 5 main components: delphinidin (40.70±1.72)%, cyanidin (3.40±0.68)%,petunidin (17.70±0.54)%, peonidin (2.90±0.63)% and malvidin (35.50±1.11)%. The malvidin percentage was significantly higher (P ＜0.05) than it in Av.myr. Av.uli complied with a dose-dependent repression of cancer cell proliferation with an IC50 (50% inhibitory concentration) value of 50 μg/ml, and showed greater anticancer efficiency than AL. cae and Av. myr under the same cell treatment conditions. These observations were further supported by the results of nuclear assays.Conclusions The extraction protocol and conditions we used were effective for anthocyanin extraction. Av.uli could be a feasible practical research tool and a promising therapeutic source to suppress human colon or colorectal cancers.
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