The MR tracking of transplanted ATDC5 cells using fluorinated poly-L-lysine-CF3.
Magnetic resonance (MR) imaging using super-paramagnetic iron oxides (SPIOs) is a powerful tool to monitor transplanted cells in living animals. However, since SPIOs are negative contrast agents it is difficult to track transplanted cells in bone and cartilage that originally display low signals. In this study, we examined the feasibility of tracking with fluorescein isothiocyanate (FITC)-labeled poly-L-lysine-CF(3) (PLK-CF(3)) using mouse ATDC5 cells, a stem cell line of bone and cartilage cells. FITC-labeled PLK-CF(3) was easily internalized by ATDC5 cells by adding it into culture medium. No acute or long-term toxicities were seen at less than 160 microg/ml. Labeled cells transplanted into the cranial bone of mice were detected for at least 7 days by MR images. FITC-labeled PLK-CF(3) is a useful positive contrast agent for MR tracking in bone and cartilage.
Maki
Junichi
J
Molecular Neuroscience Research Center, Shiga University of Medical Science, Otsu 520-2192, Japan.
Masuda
Chiaki
C
Morikawa
Shigehiro
S
Morita
Masahito
M
Inubushi
Toshiro
T
Matsusue
Yoshitaka
Y
Taguchi
Hiroyasu
H
Tooyama
Ikuo
I
D000818:Animals; D016025:Bone Transplantation / Q000379:methods*; D002460:Cell Line; D017690:Cell Transplantation / Q000379:methods*; D002478:Cells, Cultured; D003287:Contrast Media / Q000494:pharmacology; D052203:Ferrosoferric Oxide / Q000494:pharmacology*; D006863:Hydrogen-Ion Concentration; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D051379:Mice; D008813:Mice, Inbred ICR; D011107:Polylysine / Q000494:pharmacology*; D012680:Sensitivity and Specificity; D012886:Skull / Q000473:pathology*
D003287:Contrast Media; D011107:Polylysine; D052203:Ferrosoferric Oxide