Shell cross-linked and hepatocyte-targeting nanoparticles containing doxorubicin via acid-cleavable linkage
✍ Scribed by Changhai Lu; Malcolm M.Q. Xing; Wen Zhong
- Book ID
- 104063126
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 731 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1549-9634
No coin nor oath required. For personal study only.
✦ Synopsis
Hepatocyte-targeting and shell cross-linked nanoparticles with lactose moiety on the surface and doxorubicin (DOX) in the core were prepared from lactose-PEG-DOX conjugate. The process consists of the synthesis of a novel α-hydrazine-ω-propargyl poly(ethylene glycol) (PEG) with a double bond in the PEG backbone, followed by the bonding of a lactose molecule containing an azide group to the ω-end of PEG via "click" chemistry, and finally, the conjugation of DOX to the α-end of PEG via an acid-labile, hydrazone linkage. The resultant conjugate can be self-assembled into nanoparticles. Thiolated tri(ethylene glycol) was introduced into the shell of nanoparticles as a crosslinking agent. The release of DOX is more rapid from lactose-PEG-DOX at pH 5.0 than at pH 7.4. Fluorescent microscope studies suggest that the lactose-DOX nanoparticles are internalized by hepatoma cells through a lactose receptor-mediated mechanism, whereas the lactosefree nanoparticles are not endocytosed as rapidly as lactose-DOX nanoparticles. MTT assay also shows that lactose-DOX nanoparticles have a stronger inhibition against hepatoma cells than DOX nanoparticles and pure DOX.
From the Clinical Editor: In this basic science study, a highly efficient targeted doxorubicin delivery method to hepatocytes is presented.