Radionuclide-chitosan complex having an improved stabilized...

A - Human Necessities – 61 – K

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A61K 51/06 (2006.01) A61K 31/722 (2006.01) A61P 35/00 (2006.01)

Patent

CA 2589894

The present invention relates to a radionuclide-chitosan complex solution and its preparation method, and more particularly to the radionuclide-chitosan complex solution having a viscosity of 300 ~ 2,400 cps, comprising an aqueous chitosan solution or a freeze-dried chitosan labeled with a radionuclide. The radionuclide-chitosan complex solution according to the present invention has a stable gelation state at a target region when injected into the body while maintaining a labeling yield of radioisotope to chitosan above 99 %. Side effects may be minimized and treatment efficiency may be increased when injected to a patient.

La présente invention porte sur une solution d'un complexe radionucléide-chitosane et sur son procédé de préparation et, notamment, sur une solution d'un complexe radionucléide-chitosane ayant une viscosité comprise entre 300 et 2400 cps. Ce complexe comprend une solution aqueuse de chitosane ou un chitosane lyophilisé marqué par un radionucléide. La solution du complexe radionucléide-chitosane de cette invention a un état de gélification stable au niveau d'une région cible lorsqu'elle est injectée dans le corps et conserve parallèlement un rendement de marquage de radio-isotope par rapport au chitosane supérieur à 99 %. Les effets secondaires peuvent être minimisés et l'efficacité du traitement peut être accrue lorsque cette solution est injectée à un patient.

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