Development of FAP-targeted theranostics discovered by next-generation sequencing-augmented mining of a novel immunized VNAR library.

Cancer-associated fibroblasts (CAFs) in the stroma of solid tumors promote an immunosuppressive tumor microenvironment (TME) that drives resistance to therapies. The expression of the protease fibroblast activation protein (FAP) on the surface of CAFs has made FAP a target for development of therapies to dampen immunosuppression. Relatively few biologics have been developed for FAP and none have been developed that exploit the unique engagement properties of Variable New Antigen Receptors (VNARs) from shark antibodies.

Solid phase extraction chromatography-based radiochemical isolation of cyclotron-produced Mn from enriched Fe targets.

We report DGA extraction chromatography isolation of Mn from isotopically enriched Fe. The method has been studied in semi-automated and automated realizations. The former achieves a decay corrected radiochemical yield of 78 ± 1 % (n = 3) and a separation factor of (1.

Immuno-PET Imaging of CD93 Expression with Cu-Radiolabeled NOTA-mCD93 ([Cu]Cu-NOTA-mCD93) and Insulin-Like Growth Factor Binding Protein 7 ([Cu]Cu-NOTA-IGFBP7).

CD93 is overexpressed in multiple solid tumor types, serving as a novel target for antiangiogenic therapy. The goal of this study was to develop a Cu-based positron emission tomography (PET) tracer for noninvasive imaging of CD93 expression. Antimouse-CD93 mAb (mCD93) and the CD93 ligand IGFBP7 were conjugated to a bifunctional chelator, -isothiocyanatobenzyl-1,4,7-triazacyclononane-1,4,7-triacetic acid (-SCN-NOTA) and labeled with Cu.

Sustainable production of radionuclidically pure antimony-119.

Background: Radiopharmaceutical therapy (RPT) uses radionuclides that decay via one of three therapeutically relevant decay modes (alpha, beta, and internal conversion (IC) / Auger electron (AE) emission) to deliver short range, highly damaging radiation inside of diseased cells, maintaining localized dose distribution and sparing healthy cells. Antimony-119 (Sb, t = 38.19 h, EC = 100%) is one such IC/AE emitting radionuclide, previously limited to in silico computational investigation due to barriers in production, chemical separation, and chelation.

Charting the coordinative landscape of the F-Sc/Sc/Lu triad with the tri-aza-cyclononane (tacn) scaffold.

The widely established PET isotope F does not have a therapeutic partner. We have recently established that the Sc-F bond can be formed under aqueous, high yielding conditions, paving the way to providing F as diagnostic partners to Sc and Lu radiotherapeutics. Here, we synthesized a library of tacn-based chelators comprised of 10 structurally unique permutations incorporating acetate, methyl-benzylamide and picolinate donor arms.