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• W2043528305 abstract "The technetium 99 m (99mTc)-radiolabeled, leukocyte-avid peptide–glycoseaminoglycan complex, [99mTc]P1827DS, has been synthesized as an improved infection/inflammation imaging agent to [99mTc]P483H (LeukoTect, Diatide). In a phase I/II clinical trail, [99mTc]P483H images were equivalent to those obtained with 111In ex vivo labeled leukocytes. However, there was physiologic accumulation of radioactivity in the body that could hamper interpretation of the images. In this study, the potential of [99mTc]P1827DS for infection imaging was assessed in comparison with [99mTc]P483H and the well-described imaging agent [99mTc] hydrazinonicotinamide (HYNIC)–interleukin 8 (IL-8). The binding of [99mTc]P1827DS to human blood cell was studied in vitro. A rabbit Escherichia coli infection model was used to perform the biodistribution and imaging studies with [99mTc]P1827DS, [99mTc]P483H and [99mTc]HYNIC–IL-8. [99mTc]P1827DS binds to leukocytes but not to erythrocytes. The leukocyte binding was not saturable up to an investigated concentration of 10 μM. The accumulation of [99mTc]P1827/DS at the infection site strongly depends on the P1827/DS ratio and was optimal at a molar ratio of 10:1. [99mTc]P1827DS shows improved biodistribution over [99mTc]P483H with similar uptake at the infection site. Abscess uptake of [99mTc]HYNIC–IL-8 was approximately three times higher than that of [99mTc]P1827DS. [99mTc]HYNIC–IL-8 showed high accumulation in the kidneys, whereas [99mTc]P1827DS showed high lung uptake and slightly higher accumulation in the liver and spleen. [99mTc]P1827DS is a potential new inflammation imaging agent, which clearly visualized the abscess in the rabbit E. coli infection model and showed improved biodistribution compared to [99mTc]P483H. However, the infection uptake and biodistribution of [99mTc]P1827DS is not superior to that of [99mTc]HYNIC–IL-8 in this animal model." @default.
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• W2043528305 date "2007-11-01" @default.
• W2043528305 modified "2023-10-14" @default.
• W2043528305 title "Preclinical evaluation of technetium 99m-labeled P1827DS for infection imaging and comparison with technetium 99m IL-8" @default.
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• W2043528305 doi "https://doi.org/10.1016/j.nucmedbio.2007.07.016" @default.
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