Selective nuclear localization of siRNA by metallic versus semiconducting single wall carbon nanotubes in
John Torin Huzil1, Evi Saliaj1, Marina V Ivanova1
1School of Pharmacy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada; School of Pharmacy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada.
Background:
The potential use of carbon nanotubes (CNTs) in gene therapy as delivery systems for nucleic acids has been recently recognized. Here, we describe that metallic versus semiconducting single-wall CNTs can produce significant differences in transfection rate and cellular distribution of siRNA in murine PAM212 keratinocytes.
Results/Methodology:
The results of cell interaction studies, coupled with supportive computational simulations and ultrastructural studies revealed that the use of metallic single wall CNTs resulted in siRNA delivery into both the cytoplasm and nucleus of keratinocytes, whereas semiconducting CNTs resulted in delivery only to the cytoplasm.
Conclusion:
Using enriched fractions of metallic or semiconducting CNTs for siRNA complex preparation may provide specific subcellular targeting advantages.
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