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Nanomedicine to overcome both systemic and tumor tissue barriers ideally should have a transformable size and surface, maintaining a certain size and negative surface charge for prolonged circulation, while reducing to a smaller size and switching to a positive surface charge for efficient penetration to and retention in the interstitial space throughout the tumor tissue. However, the design of such...
Herein, a kind of multi-responsive core-crosslinked poly (thiolether ester) micelles was facilely prepared for reactive oxygen species (ROS), acid and reduction sensitive drug delivery. Firstly, a hydroxyl-rich poly (thiolether ester) (PTE) was synthesized by the thiol-ene/thiol-expoxy polymerization using ethanedithiol (EDT) and glycidylmethacrylate (GMA) as monomers. The resultant PTE was then coupled...
The linear, Y-shaped, and linear-dendritic block copolymers of methoxy poly(ethylene glycol)-block-polyamidoamine-block-poly(l-glutamic acid) (MPEG-b-PAMAM-b-PGA) with one, two, four, and eight PGA arms but similar MPEG/PGA weight ratios (W/W) (named as P1PA, P2PA, P4PA and P8PA, respectively) were synthesized and comparatively investigated for doxorubicin hydrochloride (DOX) delivery. All the obtained...
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