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Neuropilin is a protein receptor active in neurons. There are two forms of Neuropilins, NRP-1 and NRP-2. They are transmembrane glycoproteins, and predominantly co-receptors for another class of proteins known as semaphorins. Of the semaphorins, NRP-1 and NRP-2 are specifically receptors for class-3 semaphorins, which, among many things, are responsible for axon guidance during the development of the nervous system in vertebrates.
A cyclic polypeptide molecular probe targeting neuropilin-1, preparation method and application thereof
This invention relates to a cyclic polypeptide molecular probe targeting neurocilia protein-1 (NRP-1), its preparation method, and its applications. The cyclic polypeptide molecular probe comprises the structure shown in Formula I or Formula II, where R1 is the structure shown in Formula III or Formula IV; and R2 is a radiolabeled nuclide or a radiolabeled nuclide including a bifunctional chelating group. The technical solution of this invention exhibits excellent targeting specificity and high sensitivity for NRP-1 protein, enabling visualization of NRP-1-highly expressing tumors (such as fibrosarcoma, lung cancer, pancreatic cancer, or breast cancer) and NRP-1-positive lesions (such as metabolic diseases, sclerotic lesions, or autoimmune diseases) on positron emission tomography (PET). It shows great promise in the early diagnosis of NRP-1-highly expressing malignant tumors and in guiding clinical NRP-1 monoclonal antibody treatment regimens.
Owner:FUDAN UNIV SHANGHAI CANCER CENT