
Clinical Trial: Novel Somatostatin Receptor Subtype 2 Antagonist Labelled With Terbium-161 (161Tb-DOTA-LM3) (Beta plus)
A new clinical trial post.What is Terbium-161 (161Tb-DOTA-LM3) (Beta plus).Terbium-161 is a radioactive substance. DOTA-LM3 is a novel somatostatin antagonist targeted using somatostatin receptor number 2 (SSTR2). Combined they form a radioligand for use in Pepetide Receptor Radionuclide Therapy (PRRT). It's a beta emitter but labelled 'plus' on the basis it offers more than the currently approved Luthera product (lutetium 177 or 177Lu Dotaxxx series). There is evidence that terbium-161 (161Tb) is more powerful than 177Lu, not only in combination with SST2 agonists but particularly with SST2 antagonists.Agonist vs Antagonist in the context of PRRTThe currently approved Luthera product (lutetium 177 or 177Lu Dotaxxx series) are SST2 agonists. SST2 antagonists are more efficient because they can access more binding sites on the cell surface, resulting in higher tumour uptake and…