Cytotoxic xanthone constituents of the stem bark of Garcinia mangostana (mangosteen).

Cytotoxic xanthone constituents of the stem bark of Garcinia mangostana (mangosteen).
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DOI:
10.1021/np900517h
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发表时间:
2009-11
影响因子:
5.1
通讯作者:
Kinghorn, A. Douglas
Kinghorn, A. Douglas
中科院分区:
生物学2区
文献类型:
--
作者:
Han, Ah-Reum;Kim, Jeong-Ah;Lantvit, Daniel D.;Leonardus, B. S. Kardono;Riswan, Soedarsono;Chai, Heebyung;de Blanco, Esperanza J. Carcache;Farnsworth, Norman R.;Swanson, Steven M.;Kinghorn, A. Douglas

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使用HT-29人结肠癌细胞系和基于酶的ELISA NF-κB测定,对山竹茎皮的氯仿可溶性提取物进行生物测定引导的分级分离,分离出一种新的氧杂蒽酮,即11-羟基-3-O-甲基-1-异芒果苷(1)。化合物1的结构经波谱分析确定。此外,还分离得到10个已知化合物,分别为11-hydroxy-1-isomangostin(2),11α-mangostanin(3),3-isomangostin(4),α-mangostin(5),β-mangostin(6),garcinone D(7),9-hydroxycalabaxanthone(8),8-deoxygartanin(9),gartanin(10),androxoxyxanthone(11)。化合物4-8对HT-29细胞系表现出细胞毒性,ED 50值分别为4.9、1.7、1.7、2.3和9.1 μM。在ELISA NF-κB测定中,化合物5-7、9和10抑制p65活化,IC 50值分别为15.9、12.1、3.2、11.3和19.0 μM,化合物6显示p50抑制活性,IC 50值为7.5 μM。使用HT-29、LNCaP和MCF-7细胞在体内中空纤维试验中进一步测试了α-Mangostin(5),但发现它在最高测试剂量(20 mg/kg)下没有活性。
Bioassay-guided fractionation of a chloroform-soluble extract of Garcinia mangostana stem bark using the HT-29 human colon cancer cell line and an enzyme-based ELISA NF-κB assay, led to the isolation of a new xanthone, 11-hydroxy-3-O-methyl-1-isomangostin (1). The structure of 1 was elucidated by spectroscopic data analysis. In addition, ten other known compounds, 11-hydroxy-1-isomangostin (2), 11α-mangostanin (3), 3-isomangostin (4), α-mangostin (5), β-mangostin (6), garcinone D (7), 9-hydroxycalabaxanthone (8), 8-deoxygartanin (9), gartanin (10), and cratoxyxanthone (11), were isolated. Compounds 4–8 exhibited cytotoxicity against the HT-29 cell line with ED50 values of 4.9, 1.7, 1.7, 2.3, and 9.1 μM, respectively. In an ELISA NF-κB assay, compounds 5–7, 9, and 10 inhibited p65 activation with IC50 values of 15.9, 12.1, 3.2, 11.3, and 19.0 μM, respectively, and 6 showed p50 inhibitory activity with an IC50 value of 7.5 μM. α-Mangostin (5) was further tested in an in vivo hollow fiber assay, using HT-29, LNCaP, and MCF-7 cells, but it was found to be inactive at the highest dose tested (20 mg/kg).
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