Abstract:
:RNA interference (RNAi), a natural cellular mechanism for RNA-guided regulation of gene expression could in fact become new therapeutic modality if an appropriate efficient delivery strategy that is also reproducible and safe will be developed. Numerous efforts have been made for the past eight years to address this challenge with only mild success. The majority of these strategies are based on cationic formulations that condense the RNAi payload and deliver it into the cell cytoplasm. However, most of these formulations also evoke adverse effects such as mitochondrial damage, interfering with blood coagulation cascade, induce interferon response, promote cytokine induction and activate the complement. Herein, we present a strategy that is devised from neutral phospholipids and cholesterol that self-assembled into lipid-based nanoparticles (LNPs). These LNPs were then coated with the glycosaminoglycan, hyaluronan (HA). HA-LNPs bound and internalized specifically into cancer cells compared with control, non-coated particles. Next, loaded with siRNAs against the multidrug resistance extrusion pump, p-glycoprotein (P-gp), HA-LNPs efficiently and specifically reduced mRNA and P-gp protein levels compared with control particles and with HA-LNPs loaded with control, non-targeted siRNAs. In addition, no cellular toxicity or cytokine induction was observed when these particles were cultured with human Peripheral Blood Mononuclear Cells (PBMCs). The HA-LNPs may offer an alternative approach to cationic lipid-based formulations for RNAi delivery into cancer cells in an efficient and safe manner.
journal_name
Cancer Lettjournal_title
Cancer lettersauthors
Landesman-Milo D,Goldsmith M,Leviatan Ben-Arye S,Witenberg B,Brown E,Leibovitch S,Azriel S,Tabak S,Morad V,Peer Ddoi
10.1016/j.canlet.2012.08.024subject
Has Abstractpub_date
2013-07-01 00:00:00pages
221-7issue
2eissn
0304-3835issn
1872-7980pii
S0304-3835(12)00512-5journal_volume
334pub_type
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