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Navidea Biopharmaceuticals Announces The Presentation Of Manocept™ Data At Keystone Symposia For Molecular Cell Biology Of Macrophages In Human Disease

Navidea Biopharmaceuticals, Inc. (NYSE MKT:NAVB), a biopharmaceutical company focused on precision diagnostic radiopharmaceuticals, today announced data utilizing compounds from the Company’s Manocept™ platform in models of rheumatoid arthritis are being presented by Thomas Rosol, DVM, PhD, DACVP from The Ohio State University at a Keystone Symposia on Molecular Cell Biology of Macrophages in Human Disease held, February 9-14 in Santa Fe, NM.

The poster presentation on February 12, 2014, entitled “Imaging of macrophages in immune-mediated inflammatory disease and cartilage antibody-induced arthritis in mice using Cy3-tilmanocept highlights research from Dr. Rosol and other Navidea collaborators at the Ohio State University. The studies demonstrate the ability of Cy3-tilmanocept, a CD206-targeted fluorescent imaging agent, to identify and localize to disease-state macrophages when administered intravenously, enabling detection of immune-mediated arthritis in affected joints in vivo in mice. Results were confirmed using histopathology. The data highlighted the identification of immune-mediated inflammation seen in arthritic elbows and knees of arthritis-affected mice but not in control mice or un-affected joints within arthritic mice.

“The imaging results in this study showed preferential localization of macrophages by Cy3-tilmanocept in affected joints with little to no localization in unaffected joints,” commented Thomas Rosol, DVM, PhD, DACVP from The Ohio State University and member of the Manocept Advisory Board. “As the mannose receptor is a key portal for imaging pathological states of macrophage-associated inflammation, the Manocept-derived molecules are potentially potent tools for addressing unmet needs in this area such as identifying, staging, assessing disease activity and monitoring therapeutic efficacy.”

“Collaborative studies such as this as well as those recently published in Nature Outlook: Medical Imaging by key experts in the field of immune-inflammatory, macrophage-mediated diseases provide strong encouragement in support of the Manocept platform,” said Frederick Cope, PhD, FACN, Navidea Senior Vice President and Chief Scientific Officer. “We intend to continue evaluating these emerging data to further define promising areas of clinical focus, development pathways and partnering options for this innovative platform.”

About the Manocept Platform

Navidea’s Manocept platform is predicated on the ability to specifically target the CD206 mannose receptor expressed on macrophages. Macrophages play important roles in many disease states and are an emerging target in many diseases where diagnostic uncertainty exists. This flexible and versatile platform acts as an engine for purpose-built molecules that may enhance diagnostic accuracy, clinical decision-making and ultimately patient care, while offering the potential to utilize a breadth of diagnostic modalities, including SPECT, PET, intra-operative and/or optical-fluorescence detection. The Company’s FDA-approved precision diagnostic lymphatic mapping agent, Lymphoseek® (technetium 99m tilmanocept) Injection, is representative of the ability to successfully exploit this mechanism to develop powerful, new diagnostic agents.

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