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Abstract #1881

Water-Soluble Gadolinium Nanoparticles Coated with DO3A-Benzothiazole Conjugate: Synthesis and Application as a Potential Theragnostic Agent

Min-Kyoung Kang1, Hee-Kyung Kim1, Ki-Hye Jung2, Ji-Ae Park3, Seung-Tae Woo4, Joo-Hyun Kim4, Eun-Young Jeon5, Tae-Jeong Kim2, Yongmin Chang1, 6

1Medical & Biological Engineering, Kyungpook National University, Daegu, Korea; 2Applied Chemistry, Kyungpook National University, Daegu, Korea; 3Molecular Imaging Research Center, Korea Institute of Radiological & Medical Science, Seoul, Korea; 4Bayer Healthcare, Medical care, Seoul, Korea; 5The Advanced Medical Technology Cluster for Diagnosis & Prediction, Kyungpook National University, Daegu, Korea; 6Diagnostic Radiology and Molecular Medicine, Kyungpook National University, Daegu, Korea

Gadolinium nanoparticles (GdNPs) based perfectly soluble potential theragnostic agents formulated as Gd@SiO2-NHCO-DO3A-BT. The preparation initially requires the formation of Gd@SiO2 through self-condensation of TEOS on the surface of GdNPs. Gd@SiO2-NH2 thus formed was dispersed in diethylen glycol to react with APTES. In order to increase solubility as well as used by potential bimodal contrast agents, Gd@SiO2-NH2 was further conjugated with DO3A-benzothiazole to give the desired product Gd@SiO2-NHCO-DO3A-BT. Gd@SiO2-NHCO-DO3A reveals high MR relaxivity (R1 = 8.29 mM-1s-1) and may be put into a new family of potential multifunctional MRI/optical CAs.