Navidea Biopharmaceuticals Announces Acceptance of Abstract for Presentation at the Society of Nuclear Medicine and Molecular Imaging Annual Meeting
Navidea Biopharmaceuticals (NYSE American: NAVB) announced the acceptance of its abstract for presentation at the SNMMI Annual Meeting in Vancouver, Canada, from June 11-14. The abstract focuses on TAM-targeted imaging agents for tumor localization, developed in collaboration with the University of Alabama at Birmingham. The research aims to improve tumor imaging while reducing liver localization, showcasing promising results with new imaging agents labeled with gallium-68. This presentation highlights Navidea's commitment to advancing medical imaging and potential therapeutic strategies.
- Acceptance of abstract at SNMMI Annual Meeting, enhancing visibility.
- Research collaboration with University of Alabama at Birmingham, indicating strong academic partnerships.
- Promising results from preclinical studies on tumor localization of new imaging agents.
- Potential for improved targeted delivery of therapeutic payloads.
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This year’s annual SNMMI meeting will be held
The objectives of this preclinical study were to evaluate tumor localization of two new CD206 targeted mannosylated dextran (Navidea’s Manocept platform) imaging agents as well as an approach to reduce uptake of these imaging agents by the liver. The new imaging agents were labeled with gallium-68 (“68Ga”) to enable positron emission tomography (“PET”) imaging. The ultimate goals are to develop next generation Manocept imaging agents that offer improved on-target localization and reduced off-target localization. CD206 is a receptor expressed primarily on activated macrophages, including tumor associated macrophages (“TAMs”), as well as the Kupffer cells of the liver. TAM-targeted Manocept imaging enables imaging of tumors. The information gained from these experiments also suggests strategies to improve targeted delivery of therapeutic payloads to TAMs and other clinically significant targets, while simultaneously reducing off-target liver toxicity.
The experiments described in the poster evaluated the biodistribution in mice with and without tumors of the new 68Ga-labeled Manocept imaging agents that differed in their molecular weights. Also evaluated were the effects on their biodistributions of prior administration of unlabeled constructs or a construct designed to specifically block off-target liver localization. Results showed that the amount of the two imaging agents that localized to tumors differed significantly. Also, pretreatment with the construct designed to selectively block liver localization did significantly reduced liver localization of the 68Ga-labeled imaging agents without reducing their localizations to tumors.
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