The invention relates to ligands and complexes of metal ions with the ligands useful in various applications, including therapeutic and diagnostic applications.

The present invention relates to GIP(1-30) analogues which selectively bind and activate the GIP receptor and comprise a chelating moiety capable of binding a metal ion and their use, for example in PET imaging or for radiotherapy.

Imaging agents comprising an isolated polypeptide conjugated with a radionucleide and a chelator; wherein the isolated polypeptide binds specifically to HER2, or a variant thereof; and methods for preparing and using these imaging agents.

The present invention is directed to transduced T cells expressing at least 100,000 molecules of human somatostatin receptor 2 (SSTR2), which improves PET/CT imaging sensitivity. The present invention is also directed to transduced T cells expressing SSTR2 and chimeric antigen receptor (CAR). In one embodiment, the CAR is specific to human ICAM-1 and the CAR comprises a binding domain that is scFv of anti-human ICAM-1, or an I domain of the αL subunit of human lymphocyte function-associated antigen-1. In another embodiment, the CAR is specific to human CD19, and the CAR comprises a binding domain that is scFv of anti-human CD19. The present invention is further directed to using the above transduced T cells for monitoring T cell distribution in a patient by PET/CT imaging and/or treating cancer.

A pharmacological composition contains a complex having a structurally modified RGD polypeptide a radionuclide. This pharmacological composition is useful for diagnosis or treatment of the integrin αvβ3-positive tumors. The pharmacological composition may further contain an immunotherapeutic medicament and an optional nanoantibody molecular imaging probe. Treatment with a PD-L1 blockade after the targeted radioactive therapy can archive the optimal synergic efficacy. Moreover, with administration of PD-1 or PD-L1 nanoantibody molecular imaging probe, expression of PD-1 or PD-L1 in the tumor after targeted radiotherapy can be observed.

The invention relates to methods of treating cancer with CTT1403 having specificity for prostate-specific membrane antigen (PSMA).

The present disclosure concerns luteinizing hormone receptor hormone (LHRH) compositions that can selectively bind to an LHRH receptor. Through the incorporation of radionuclides in the LHRH compositions, selective radiolabeling is made possible, allowing for identification of cells over-expressing the LHRH receptor, which is often a facet of an abnormally growing cell or a tumorigenic cell. The LHRH compositions can therefore provide for improved detection and monitoring of cancers associated with or caused by LHRH receptor over-expression.

Described herein are novel conjugates containing an inhibitor (e.g., a PSMA inhibitor, e.g., a gastrin-releasing peptide receptor inhibitor) and metal chelator that are covalently attached to a macromolecule (e.g., a nanoparticle, a polymer, a protein). Such conjugates exhibit distinct properties over the free, unbound inhibitor/chelator construct.

The present invention relates to compositions and methods employing conjugates that include a self-assembly and disassembly (SADA) polypeptide and a binding domain. The present invention encompasses the recognition that conjugates with a SADA polypeptide have certain improved biological properties. SADA-conjugates are described, along with uses thereof (e.g., as therapeutic or diagnostic agents) and methods of manufacture.

Provided herein are radiopharmaceutical conjugate compositions and uses thereof. In one aspect, provided herein are conjugates that comprise a monocyclic peptide of 5 to 40 amino acid residues and a metal chelator configured to bind with a radionuclide. In some embodiments, the monocyclic peptide is cyclized by a non-disulfide bond. In some embodiments, the monocyclic peptide does not comprise any non-disulfide bond. The monocyclic peptide can be configured to bind with a structure on a cell. Further provided herein are methods of treating cancer by administering the described conjugates and compositions.