Abstract
Vasovist (EPIX Pharmaceuticals and Schering AG) is a newly developed blood pool contrast agent for magnetic resonance imaging with a high affinity for human albumin, making it an ideal tool for the detection of structural abnormalities such as stenosis and aneurysm. For the risk assessment of the single diagnostic use in patients, the toxicity of this compound was investigated. Studies of acute, repeated-dose, reproductive, and developmental toxicity as well as local tolerance, immunotoxicity, and mutagenic potential were performed. Lethality was observed in rodents after single intravenous administration at doses of at least 2 orders of magnitude higher than the anticipated human dose of 0.03 mmol/kg. The no observed adverse effect level after repeated daily administration over the course of 4 weeks to monkeys exceeded the single diagnostic dose by a factor of 3.3. The main effect of repeated dosing in both rats and monkeys was vacuolation in kidney proximal tubules without concomitant effect on kidney function. Studies into reproduction toxicity have shown no evidence of effects on fertility or perinatal and postnatal development. Signs of embryo-fetal toxicity were observed in rabbits after repeated administration of high do...Continue Reading
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