作者: Melissa D. Howard , Andrei Ponta , Allison Eckman , Michael Jay , Younsoo Bae
DOI: 10.1007/S11095-011-0470-1
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摘要: Purpose To develop polymer micelles for the tunable release of Dexamethasone (DEX) in tumors. Methods DEX was conjugated to poly (ethylene glycol)-poly (aspartate) block copolymers using hydrazone, ester, or hydrazone-ester dual linkers. Ketonic acids containing 3, 4, and 5 methylene groups were used as spacers to separate the dual linkers. Polymer micelles from the DEX-conjugated polymers were tested for drug release at different pH values and carboxylesterase activity levels. Results DLS measurements and 1 …