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Development of Heparanase Inhibitors for Anti-Cancer Therapy

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Heparanase is an endo-beta-D-glucuronidase that degrades heparan sulfate glycosaminoglycan side chains of the proteoglycans in extracellular matrix and basement membrane. Heparanase enzymatic activity is important in the promotion of tumor angiogenesis, primary tumor growth, invasion, and metastasis. Expression of heparanase in many tumor types conversely correlates with prognosis. Much progress has been made in studying the regulation of heparanase expression, processing and activation. The interaction between heparanase and its substrate heparan sulfate has been well characterized. The fact that heparanase was identified as the single predominant heparan sulfate-degrading enzyme in human cancer sparked considerable interest in developing heparanase inhibitors for potential therapeutic applications. Recent progress in drug development led to several classes of heparanase inhibitors, including chemically modified natural products, small molecule inhibitors, and antibodies. Some of these inhibitors have demonstrated potent activities to inhibit tumor angiogenesis, tumor progress, or tumor metastasis. A leading compound, PI-88, is currently being evaluated in clinical phase II trials in patients with melanoma, liver, or lung cancers. This review summarizes the recent progress in heparanase biochemical research and the development of heparanase antagonists as novel anti-cancer therapeutics.

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Keywords: Angiogenesis; drug development; extracellular matrix; heparan sulfate; heparanase; metastasis; tumor growth

Document Type: Research Article

Affiliations: ImClone Systems Incorporated, 180 Varick Street, New York, NY 10014, USA.

Publication date: 2006-08-01

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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