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New class of antiangiogenesis drugs discovered from South American tree. |
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EurekAlert: One of two compounds identified by this process was dehydro-alpha-lapachone (DAL), derived from Tabebuia avellanedae, a tree native to Argentina and Brazil. Since DAL has structural similarities to another agent with antitumor activities and did not appear to be toxic, it was chosen for further investigation. The researchers first showed that DAL administration interfered with blood vessel formation in zebrafish, both during embryonic development and wound healing. They then found that it reduced the vascular density of tumors implanted in mice and, with daily treatment, significantly reduced tumor growth with no signs of toxicity.
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