期刊
JOURNAL OF NATURAL PRODUCTS
卷 69, 期 7, 页码 1095-1097出版社
AMER CHEMICAL SOC
DOI: 10.1021/np060081y
关键词
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A bioassay-guided phytochemical investigation on the methanol extract of Boehmeria pannosa, using a HIF-1-mediated reporter gene assay, led to the isolation of two phenanthroquinolizidine alkaloids, (-)-cryptopleurine (1) and (-)-(15R)-hydroxycryptopleurine (2). The structure of the new compound 2 was determined by spectroscopic methods. Compounds 1 and 2 potently inhibited the hypoxia-induced expression of a reporter gene under the control of a hypoxia response element (HRE) with IC50 values of 8.7 and 48.1 nM, respectively. Furthermore, 1 and 2 suppressed the accumulation of HIF-1 alpha protein in a dose-dependent manner, but not the HIF-1 beta protein and inhibited expression of vascular endothelial growth factor (VEGF) by hypoxia.
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