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The Roadblocks to Angiogenesis Blockers

Although compounds that block the development of new blood vessels have shown great promise in treating cancer in mice, human clinical trials are still at least 2 years away, according to researchers, in part because it is not yet possible to produce the necessary quantities of the compounds. So experts on cancer drugs were surprised by the heated speculation last week over two of these so-called antiangiogenesis compounds, angiostatin and endostatin.