Journal
BIOMACROMOLECULES
Volume 11, Issue 8, Pages 1915-1920Publisher
AMER CHEMICAL SOC
DOI: 10.1021/bm1004993
Keywords
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Funding
- Center for Nanoscience and Nanobiotechnology at Boston University
- Focused Ultrasound Surgery Foundation
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A novel polymer-modified thermosensitive liposome (pTSL) was developed for the delivery of Doxorubicin (DOX) for cancer therapy. Copolymers containing temperature-responsive N-isopropylacrylamide (NIPAAm) and pH-responsive propylacrylic acid (PAA) were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization, yielding copolymers with dual pH/temperature-dependent phase transition properties. When attached to liposomes, these copolymers were membrane-disruptive in a pH/temperature-dependent manner. pTSL demonstrated enhanced release profile and significantly lower thermal dose threshold when compared to traditional thermosensitive formulations and were stable in serum with minimal drug leakage over time. These liposomes thus have the potential to dramatically reduce the risk of damage to healthy tissues that is normally associated with liposomal cancer therapy.
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