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Antiangiogenic activity of 3,4- seco -cycloartane triterpenes from Thai Gardenia spp. and their semi-synthetic analogs

Bioorganic & Medicinal Chemistry Letters, ISSN: 0960-894X, Vol: 22, Issue: 1, Page: 512-517
2012
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Twelve naturally occurring 3,4- seco -cycloartane triterpenes ( 1 – 12 ) isolated from Gardenia sootepensis and Gardenia obtusifolia, and eight semi-synthetic derivatives ( 13 – 20 ) were evaluated for their antiangiogenic activity on a rat aortic sprouting assay, an ex vivo model of angiogenesis. Among these compounds, sootepin B ( 1 ) displayed the most potent activity in terms of the inhibition of microvessel sprouting from rat aortic rings in a dose-dependent manner with IC 50 value of 4.46 μM. Its angiogenic effect was found to occur via suppression of endothelial cell proliferation and tubular formation, and was likely mediated by regulation (inhibition) of the Erk1/2 signaling pathway.

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