Journal
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
Volume 71, Issue 2, Pages 223-230Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ejpb.2008.08.013
Keywords
Polymeric mixed micelles; Poly(L-histidine); pH-sensitive; Anticancer drug delivery; Doxorubicin; Drug incorporation; In vitro kinetics
Categories
Funding
- NIH [CA101850]
Ask authors/readers for more resources
In this study, doxorubicin (DOX) was physically incorporated into pH-sensitive micelles made from a mixture of poly(L-histidine)-b-polyethylene glycol)(poly(L-lactide)-b-poly(ethylene glycol) (75/25, wt%). The DOX-loaded mixed micelles were formulated using dialysis methods and optimal DOX incorporation was achieved at a drug/polymer feed ratio of 0.2 (wt./wt.) when a proper amount of aqueous phase (0.2. v./v.) was added into the common solvent (DMSO) solution, followed by dialysis at 4 degrees C. Based on the results obtained from dynamic light scattering, UV-Vis absorption, and fluorescence experiments, it was demonstrated that the encapsulated drugs were mainly located inside the hydrophobic micelle cores, well protected and inaccessible to the exterior molecules. Under in vitro conditions, although the microstructure of the micelles was altered below pH 8.0 by the encapsulated drugs, the drug-loaded micelles still exhibited a desirable ability to control the drug release in response to tumor extracellular pH. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available