Analytical Sciences


Abstract − Analytical Sciences, 37(5), 785 (2021).

Facile Preparation of a Hairpin DNA-Gold Nanoparticle Monoconjugate with a Single-Dye Molecule and Lactobionic Acid as Targeting Ligand
Akane MUKAIDA,* Rihito ADACHI,* Yoshitsugu AKIYAMA,** and Masao KAMIMURA*
*Department of Materials Science and Technology, Graduate School of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo 125-8585, Japan
**Faculty of Industrial Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo 125-8585, Japan
We established a new design for a single molecular beacon-conjugated gold nanoparticle, named monoMB-GNP, which showed enhanced fluorescence emission only in the presence of the complementary DNA sequence. MonoMB-GNP also showed no apparent toxicity to NIH/3T3 cells at 1 nM, as determined by the water-soluble tetrazolium assay. Importantly, the lactobionic acid was successfully modified on the surface of monoMB-GNP. The proposed nanoparticle has prospects for use in several applications for targetable molecular beacon strategies.