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Three novel sterols isolated from Selaginella tamariscina with antiproliferative activity in leukemia cells
Liang-liang Gao1, Shi-liang Yin, Zhan-lin Li
1School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, PR China.
Abstract:
Three new sterols, 3beta,16alpha-dihydroxy-5alpha,17beta-cholestan-21-carboxylic acid (1), 3beta-acetoxy-16alpha-hydroxy-5alpha,17beta-cholestan-21-carboxylic acid (2) and 3beta-(3-hydroxybutyroxy)-16alpha-hydroxy-5alpha,17beta-cholestan-21-carboxylic acid (3) were isolated from Selaginella tamariscina (Beauv.) Spring (Selaginellaceae). Their structures were elucidated based on NMR analyses. The growth inhibitory effects and differentiation induction abilities of compounds 1 - 3 were determined in human leukemia HL-60 cells. Compound 1 was more effective than compounds 2 and 3 in inhibiting cell growth, but compound 3 was more effective than compounds 1 and 2 in enhancing induction of all- trans-retinoic acid differentiation.
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