S-Space College of Veterinary Medicine (수의과대학) Dept. of Veterinary Medicine (수의학과) Journal Papers (저널논문_수의학과)
Nanowire-Based Delivery of Escherichia coli O157 Shiga Toxin 1 A Subunit into Human and Bovine Cells
- Kwon, Nam Hoon; Beaux II, Miles F.; Ebert, Chad; Wang, Lidong; Lassiter, Brian E.; Park, Yong Ho; McIlroy, David N.; Hovde, Carolyn J.; Bohach, Gregory A.
- Issue Date
- American Chemical Society
- Nano Lett. 2007, 7, 2718-2723
- Silica nanowires (NWs) were used to introduce the Shiga toxin type 1 A subunit (StxA1) into cultured bovine and human epithelial cells. We
extended technology developed in our laboratories that employs fibronectin (Fn) to induce integrin-mediated uptake of NWs by coating NWs
with StxA1 and Fn. The bonding strengths of Fn and StxA1 to the surface of NWs were measured by X-ray photoelectron spectroscopy. This
technique demonstrated complex interactions between Fn, StxA1, and the NWs. Neutral red cytotoxicity assays and field emission scanning
electron microscopy confirmed that the NW-StxA1-Fn complexes were effectively internalized and caused cell death. This indicates that NWs
can carry StxA1 and potentially other toxic or therapeutic agents into eukaryotic cells. Ongoing studies include improved functionalizing of
NWs aimed at increasing internalization efficiency and substituting ligands for specific cell targeting.
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