Method of encapsulating metal complex within liposomes

摘要

An object of the present invention is to provide a method of producing liposome wherein a complex of a short half-life metallic radioactive nuclide such as ^99mTc and CD is encapsulated, with radiochemical yield and purity enabling practical application. The present invention provides a method of producing a liposome wherein a complex of a short half-life metallic radioactive nuclide and ethylenedicysteine (CD) is encapsulated, which comprises mixing a complex of a short half-life metallic radioactive nuclide and N-[2-(1H-pyrrolylmethyl)]-N'-(4-penten-3-on-2)-ethane-1,2-diamine with an ethylenedicysteine (CD)-encapsulated liposome, and incubating the mixture.