Pre-clinical results with Clariscan (NC100150 Injection); experience from different disease models.
A superparamagnetic nanoparticle (NC100150 Injection) was investigated in two different animal models; renal perfusion in pigs and tumour imaging in mice. In the pig model, qualitative first-pass perfusion maps following a bolus injection of NC100150 Injection enabled good visualisation of hypoperfused regions of the renal cortex following partial ligation of the renal artery. High temporal resolution was found to be essential to accurately capture the first passage of the contrast agent through the kidney due to the very rapid blood flow in normal renal cortex. In the tumour model (LS174T cells implanted in nude mice), NC100150 Injection was found to cause a gradual (over 60 min) signal increase on T1-w images in part of the tumours which was attributed to contrast agent leakage from the vascular space to the extravascular space in areas of increased capillary permeability. This observation is consistent with previous reports on the molecular cut-off size for vascular extraction for this tumour cell line. The specific enhancement of tumour tissue suggest potential utility of NC100150 Injection as an angiogenesis marker.
Bjørnerud
A
A
Nycomed Amersham Imaging, P.O. Box 4220, Torshov, N-0401 Oslo, Norway. abj@nycomed.com
Johansson
L O
LO
Ahlström
H K
HK
D000230:Adenocarcinoma / Q000175:diagnosis*; D000818:Animals; D003110:Colonic Neoplasms / Q000175:diagnosis*; D003287:Contrast Media; D003911:Dextrans; D004195:Disease Models, Animal; D052203:Ferrosoferric Oxide; D006801:Humans; D007501:Iron; D007511:Ischemia / Q000175:diagnosis; D007668:Kidney / Q000033:anatomy & histology* / Q000098:blood supply*; D007672:Kidney Cortex / Q000098:blood supply; D008279:Magnetic Resonance Imaging / Q000379:methods*; D058185:Magnetite Nanoparticles; D051379:Mice; D008819:Mice, Nude; D010087:Oxides; D012078:Renal Artery Obstruction / Q000175:diagnosis* / Q000503:physiopathology; D012680:Sensitivity and Specificity; D013552:Swine; D014183:Transplantation, Heterologous; D014407:Tumor Cells, Cultured
D003287:Contrast Media; D003911:Dextrans; D058185:Magnetite Nanoparticles; D010087:Oxides; C097921:ferumoxtran-10; D007501:Iron; D052203:Ferrosoferric Oxide