The secret to this breakthrough lies in its microscopic precision. The PSI researchers, working in tandem with experts from Inselspital Bern, have coupled the radioactive terbium-161 to a specialized antibody designed to hunt. This antibody acts as a homing missile, docking specifically onto the CD30 receptorâa structure found on the surface of tumor cells in nearly one-third of all lymphoma patients.
Once docked, the payload is delivered with lethal accuracy. Unlike lutetium-177, which can allow individual tumor cells and smaller clusters to escape detection, terbium-161 fires what researchers describe as "more precise projectiles." It emits radiation that effectively neutralizes even the smallest clusters of malignant cells that previously evaded treatment. This "sniper approach" ensures that the cancer has nowhere to hide, addressing a critical gap in current radionuclide therapies. By focusing on the CD30 receptor, Swiss science is moving away from carpet-bombing the body and toward a future of hyper-targeted, highly effective elimination of disease.