Small · 2011 · 232 citations · 41 references
PharmacyCancer BiologyOncologyDrug DeliveryNanomaterialsNanoparticle Drug DeliveryCancer NanomedicineEwing SarcomaNanomaterials For Drug DeliveryNanomedicineNucleic Acid DeliverySmall Interfering Rna DeliveryCancer NanotherapyGene Delivery NanomaterialsGene Delivery NanoparticlesIn Vivo DeliveryIntrinsic FluorescenceNanoparticlesNucleic Acid Delivery SystemsTumor-targeted Drug Delivery
The ability of diamond nanoparticles (nanodiamonds, NDs) to deliver small interfering RNA (siRNA) into Ewing sarcoma cells is investigated with a view to the possibility of in-vivo anticancer nucleic-acid drug delivery. siRNA is adsorbed onto NDs that are coated with cationic polymer. Cell uptake of NDs is demonstrated by taking advantage of the NDs' intrinsic fluorescence from embedded color-center defects. Cell toxicity of these coated NDs is shown to be low. Consistent with the internalization efficacy, a specific inhibition of EWS/Fli-1 gene expression is shown at the mRNA and protein level by the ND-vectorized siRNA in a serum-containing medium.
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