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Naphthoquinones from Onosma paniculata induce cell-cycle arrest and apoptosis in melanoma Cells.

ABSTRACT: Activity-guided fractionation of a petroleum ether-soluble extract of the roots of Onosma paniculata, which has been shown to affect the cell cycle and to induce apoptosis in melanoma cells, led to the isolation of several shikonin derivatives, namely, ?-hydroxyisovalerylshikonin (1), acetylshikonin (2), dimethylacrylshikonin (3), and a mixture of ?-methylbutyrylshikonin and isovalerylshikonin (4+5). All compounds exhibited strong cytotoxicity against eight cancer cell lines and MRC-5 lung fibroblasts, with 3 found to possess the most potent cytotoxicity toward four melanoma cell lines (SBcl2, WM35, WM9, and WM164). Furthermore, 3 and the mixture of 4+5 were found to interfere with cell-cycle progression in these cell lines and led to an increasing number of cells in the subG1 region as well as to caspase-3/7 activation, indicating apoptotic cell death.

SUBMITTER: Kretschmer N 

PROVIDER: S-EPMC3361261 | biostudies-literature | 2012 May

REPOSITORIES: biostudies-literature

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Naphthoquinones from Onosma paniculata induce cell-cycle arrest and apoptosis in melanoma Cells.

Kretschmer Nadine N   Rinner Beate B   Deutsch Alexander J A AJ   Lohberger Birgit B   Knausz Heike H   Kunert Olaf O   Blunder Martina M   Boechzelt Herbert H   Schaider Helmut H   Bauer Rudolf R  

Journal of natural products 20120424 5

Activity-guided fractionation of a petroleum ether-soluble extract of the roots of Onosma paniculata, which has been shown to affect the cell cycle and to induce apoptosis in melanoma cells, led to the isolation of several shikonin derivatives, namely, β-hydroxyisovalerylshikonin (1), acetylshikonin (2), dimethylacrylshikonin (3), and a mixture of α-methylbutyrylshikonin and isovalerylshikonin (4+5). All compounds exhibited strong cytotoxicity against eight cancer cell lines and MRC-5 lung fibro  ...[more]

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