MarketCombretastatin A-4
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Combretastatin A-4

Combretastatin A-4 is a combretastatin and a stilbenoid. It can be isolated from Combretum afrum, the Eastern Cape South African bushwillow tree or in Combretum leprosum, the mofumbo, a species found in Brazil.

Function
Tubulin represents a potent target in cancer chemotherapy, given its role in cell division. Combretastatin is a naturally occurring well known tubulin polymerization inhibitor. Combretastatin A-4 comes in two stereoisomers (cis (shown top right), and trans); The cis form binds much better to the 'colchicine' site on tubulin to inhibit polymerization. == Derivatives ==
Derivatives
Combretastatin A-4 is the active component of combretastatin A-4 phosphate, a prodrug designed to damage the vasculature (blood vessels) of cancer tumors causing central necrosis. A large number of synthetic derivatives have been reported, including beta-lactam based compounds. == Pharmacokinetics ==
Pharmacokinetics
CA4 has a half life of 1.8-4.2h in humans. CA4P(a prodrug) has a half life of 0.22-0.36h in humans. == See also ==
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