Abstract：
:In this study, solid lipid nanoparticles (SLN) loaded with MBO-asGCS oligonucleotide were prepared, characterized and evaluated for cytotoxicity against NCI/ADR-RES human ovary cancer cells. Two types of cetyltrimethyl ammonium bromide (CTAB) stabilized SLN, with or without ceramide VI, were prepared by mixed homogenization/ultrasonication technique. Complexes were characterized for size, zeta-potential, and stability in biorelevant media and against DNaseI activity. Binding and release studies were further confirmed by gel electrophoresis. Cytotoxicity of the SLN against NCI/ADR-RES cells was evaluated by quantizing ATP. SLN with ceramide VI had lower particle size (74.6 nm) with improved stability in RPMI media when compared to reference SLN without ceramide VI (167.16 nm). Both SLN however had similar cytotoxicity profile with an optimum binding at CTAB to MBO-asGCS ratio of 6:1. Blank SLN, and free MBO-asGCS in the presence and absence of free doxorubicin had insignificant effect on the viability of NCI/ADR-RES cells. However, when cells were concurrently treated with MBO-asGCS loaded SLN and free doxorubicin, cell viability significantly decreased to approximately 12%. These results suggested that SLN enhanced internalization and uptake of MBO-asGCS oligonucleotide, which led to the downregulation of GCS and subsequently reversing the resistance of the cells to doxorubicin.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Siddiqui A,Patwardhan GA,Liu YY,Nazzal Sdoi
10.1016/j.ijpharm.2010.08.044subject
Has Abstractpub_date
2010-11-15 00:00:00pages
251-9issue
1-2eissn
0378-5173issn
1873-3476pii
S0378-5173(10)00674-5journal_volume
400pub_type
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