Abstract:
BACKGROUND:Triple negative breast cancer (TNBC) is an aggressive disease associated with poor prognosis and lack of validated targeted therapy. Thus chemotherapy is a main adjuvant treatment for TNBC patients, but it associates with severe toxicities. For a better treatment outcome, we developed an alternative therapeutic, doxorubicin (DOX)-loaded micelles targeting human mucin1 protein (MUC1) that is less toxic, more effective and targeted to TNBC. METHODS:From many candidate peptides, QNDRHPR-GGGSK (QND) and HSQLPQV-GGGSK (HSQ) were identified computationally, synthesized and purified using solid phase peptide synthesis and semipreparative HPLC. The peptides showed significant high binding to MUC1 expressing cells using a fluorescent microscope. The peptides were then conjugated on pegylated octadecyl lithocholate copolymer. DOX-encapsulated micelles were formed through self-assembly. MUC1-targeted micelles were characterized using dynamic light scattering (DLS) and Transmission Electron Microscopy (TEM). Drug entrapment efficiency was examined using a microplate reader. Cytotoxicity, binding, and uptake were also investigated. RESULTS:Two types of DOX-loaded micelles with different targeting peptides, QND or HSQ, were developed. DOX-loaded micelles were spherical in shape with average particle size around 300-320 nm. Drug entrapment efficiency of untargeted and targeted DOX micelles was about 71-93%. Targeted QND-DOX and HSQ-DOX micelles exhibited significantly higher cytotoxicity compared to free DOX and untargeted DOX micelles on BT549-Luc cells. In addition, significantly greater binding and uptake were observed for QND-DOX and HSQ-DOX micelles on BT549-Luc and T47D cells. CONCLUSION:Taken together, these results suggested that QND-DOX and HSQ-DOX micelles have a potential application in the treatment of TNBC-expressing MUC1.
journal_name
Curr Drug Delivjournal_title
Current drug deliveryauthors
Khondee S,Chittasupho C,Tima S,Anuchapreeda Sdoi
10.2174/1567201814666170712122508subject
Has Abstractpub_date
2018-01-01 00:00:00pages
406-416issue
3eissn
1567-2018issn
1875-5704pii
CDD-EPUB-84733journal_volume
15pub_type
杂志文章abstract::The objective of this work was to investigate the main theological features of vaginal hydrophilic polymer gels and to elucidate about the relationship between these characteristics and gels composition, and their general influence in therapeutic/usage purpose. Flow and dynamic oscillatory properties of four commercia...
journal_title:Current drug delivery
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