Abstract
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 HEF-1α protein in a dose-dependent manner, but not the HIF-1β protein and inhibited expression of vascular endothelial growth factor (VEGF) by hypoxia.
Original language | English |
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Pages (from-to) | 1095-1097 |
Number of pages | 3 |
Journal | Journal of Natural Products |
Volume | 69 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2006 Jul |
Externally published | Yes |
ASJC Scopus subject areas
- Analytical Chemistry
- Molecular Medicine
- Pharmacology
- Pharmaceutical Science
- Drug Discovery
- Complementary and alternative medicine
- Organic Chemistry