TY - JOUR
T1 - Gadolinium containing photochromic micelles as potential magnetic resonance imaging traceable drug carriers
AU - Heta, Yushi
AU - Kumaki, Kentaro
AU - Hifumi, Hiroki
AU - Citterio, Daniel
AU - Tanimoto, Akihiro
AU - Suzuki, Koji
PY - 2012/7
Y1 - 2012/7
N2 - Novel photochromic amphipathic molecules, KMR-AZn (Gd-DTPA-AZCn), composed of hydrophilic Gd-DTPA and hydrophobic alkylated azobenzene were prepared. In aqueous environment, KMR-AZn indicated self-assembly. The resulting aggregates were demonstrated to be able to include a hydrophobic drug substitute (hydrophobic fluorescent dye) into the internal core, and to release the included compound upon photoirradiation within 10 min through the influence of azobenzene photoisomerization. This micellar MRI contrast agent exhibited three- to four-fold higher r1 relaxivity (r1 = 14.5-16.5 mm -1 s-1, 0.47 T at 40°C) than the widely applied small molecule contrast agent Gd-DTPA (Magnevist®r1 = 4.1 mm-1 s-1, 0.47 T at 40°C). This dual functionality of encapsulated compound release and increased MR imaging contrast indicates that KMR-AZn is a potential candidate for application as a lipid-based MRI-traceable drug carrier.
AB - Novel photochromic amphipathic molecules, KMR-AZn (Gd-DTPA-AZCn), composed of hydrophilic Gd-DTPA and hydrophobic alkylated azobenzene were prepared. In aqueous environment, KMR-AZn indicated self-assembly. The resulting aggregates were demonstrated to be able to include a hydrophobic drug substitute (hydrophobic fluorescent dye) into the internal core, and to release the included compound upon photoirradiation within 10 min through the influence of azobenzene photoisomerization. This micellar MRI contrast agent exhibited three- to four-fold higher r1 relaxivity (r1 = 14.5-16.5 mm -1 s-1, 0.47 T at 40°C) than the widely applied small molecule contrast agent Gd-DTPA (Magnevist®r1 = 4.1 mm-1 s-1, 0.47 T at 40°C). This dual functionality of encapsulated compound release and increased MR imaging contrast indicates that KMR-AZn is a potential candidate for application as a lipid-based MRI-traceable drug carrier.
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U2 - 10.1111/j.1751-1097.2012.01124.x
DO - 10.1111/j.1751-1097.2012.01124.x
M3 - Article
C2 - 22364381
AN - SCOPUS:84863716502
SN - 0031-8655
VL - 88
SP - 876
EP - 883
JO - Photochemistry and Photobiology
JF - Photochemistry and Photobiology
IS - 4
ER -