Technetium-99m labeled peptides for imaging inflammation

A - Human Necessities – 61 – K

Patent

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A61K 51/08 (2006.01)

Patent

CA 2164707

This invention relates to compositions that are radiolabeled scintigraphic imaging agents, comprising a polybasic compound covalently linked to a radiolabel binding moiety and the composition further comprising a polysulfated glycan. The invention also provides methods for producing and using such compositions. Specifically, the invention relates to compositions comprised of technetium-99m (Tc-99m) labeled scintigraphic imaging agents comprising a polybasic compound having at least 5 chemical functionalities that are basic at physiological pH and a radiolabel-binding moiety, the composition further comprising a polysulfated glycan, the composition being capable of accumulating at inflammatory sites in vivo. Methods and kits for making such compositions, and methods for using such compositions to image sites of infection and inflammation in a mammalian body, are also provided.

Cette invention se rapporte à des compositions qui sont des agents d'imagerie scintigraphique radiomarqués et qui comprennent un composé polybasique lié de manière covalente à une fraction de liaison de radiomarquage, cette composition comprenant également un glycan polysulfaté. Cette invention concerne aussi des procédés de production et d'utilisation de ces compositions. Spécifiquement, l'invention se rapporte à des compositions comprenant des agents d'imagerie scintigraphique marqués au technétium-99m (Tc-99m) renfermant un composé polybasique ayant au moins 5 fonctionnalités chimiques qui sont essentielles à un pH physiologique et une fraction de liaison de radiomarquage. La composition comprend également un glycan polysulfaté et est capable de s'accumuler au niveau de sites d'inflammation in vivo. L'invention concerne entre autre des nécessaires et des procédés de fabrication de ces compositions, ainsi que des procédés d'utilisation des compositions afin d'obtenir une imagerie des sites d'infection et d'inflammation dans le corps d'un mammifère.

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