Contrast agent

A - Human Necessities – 61 – K

Patent

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Details

A61K 49/00 (2006.01) A61K 51/02 (2006.01)

Patent

CA 2201158

The invention relates to particulate contrast agents, especially contrast agents for MR imaging, having a metal oxide, preferably superparamagnetic iron oxide core provided with a low coating density of a polyelectrolyte coating agent selected from structural polysaccharides and synthetic polymers, especially polyaminoacids. Unlike conventional coated particulates, the new particles have reduced or no effect on cardiovascular parameters, platelet depletion, complement activation and blood coagulation.

L'invention concerne des agents particulaires de contraste, notamment des agents de contraste à employer pour l'imagerie par résonance magnétique, ayant un oxyde métallique, de préférence un noyau d'oxyde de fer superparamagnétique à faible densité d'enrobage, d'un agent d'enrobage de type polyélectrolyte, choisi parmi des polysaccharides de type structural et des polymères synthétiques, des polyaminoacides notamment. A l'inverse des particules enrobées classiques, ces nouvelles particules ont une incidence réduite sur des paramètres cardio-vasculaires, sur l'appauvrissement plaquettaire, l'activation du complément et la coagulation sanguine, ou encore, sont sans incidence à cet égard.

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