The Labeling of Lanreotide With ~(188)Re and Its Biodistribution
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Abstract
Somatostatin analogue peptide (lanreotide) is labeled directly with 188Re via using tartrate as a transchelate agent and stannous chloride as a reducing agent, and the animal test is evaluated. The results show that the labeling yield is 88%~94% under the optimal labeling condition, the radiochemical purity is more than 95% after purification of SepPak C18 reverse phase extraction cartridge. The stability of 188Relanreotide can be improved by adding ascorbic acid in vitro. 188Relanreotide is eliminated rapidly from blood and is excreted through liver, the uptake of lung and intestine is higher than other organs.Key words: 188Re labeling; lanreotide; biodistribution
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