Ac-225 - Ronny Allan - Living with Neuroendocrine Cancer

Tag: Ac-225

Alpha particle-emitting isotopes are being investigated in radio-immunotherapeutic applications because of their unparalleled cytotoxicity when targeted to cancer and their relative lack of toxicity towards untargeted normal tissue. Actinium-225 has been developed into potent targeting drug constructs and is in clinical use against acute myelogenous leukaemia. Also being trialled in Neuroendocrine Cancer. Also known as targeted alpha therapy.

14Sep 2022 by Ronny Allan No Comments

Clinical Trial: Phase 1b/3 Targeted Alpha-Emitter PRRT RYZ101 (Ac225)

Clinical Trials and Research

Update 31st May 2023 - RayzeBio doses first patient on Phase 3 ACTION-1 Study, Evaluating RYZ101 (Actinium-225 DOTATATE) in Neuroendocrine Tumors RayzeBio, Inc., a targeted radiopharmaceutical company developing an innovative pipeline against validated solid tumor targets, today announced that the first patient has been dosed in the Phase 3 trial of RYZ101 in patients with SSTR+ gastroenteropancreatic neuroendocrine tumors (GEP-NETs) that have progressed following prior Lutetium-177 labelled somatostatin analogue therapy. “Patients with GEP-NETs have very limited options upon progression after Lutetium-177 labelled somatostatin analogue therapy,” said Dr. Thomas Hope, M.D., Vice Chair of Clinical Operations and Strategy in the Department of Radiology. “With existing results using Actinium-225 DOTATATE suggesting clinical benefit, we are excited to be moving this therapy forward in the ACTION-1 study.” The Phase 3 trial is…

10Jan 2018 by Ronny Allan 10 Comments

Targeted Alpha-emitter Therapy (TAT) – the wave of the future in nuclear oncology/PRRT?

Clinical Trials and Research

What is Targeted Alpha-emitter Therapy?Regular PRRT which is authorised for use now, i.e. Lutathera/Lu177 is a beta therapy. Targeted Alpha Therapy is based on the coupling of alpha particle emitting radioisotopes to tumour selective carrier molecules, such as monoclonal antibodies or peptides. These molecules have the ability to selectively target tumour cells even if they are spread throughout the body. They recognize the targeted cancer cells through antigens that are expressed on the cell surface and can bind selectively to these cells, similar a key fitting into a lock. In targeted alpha therapy these carrier molecules serve as vehicles to transport the radioisotopes to the cancer cells. This is called the "magic bullet" approach. Radioisotopes that emit alpha particles seem particularly promising to selectively destroy cancer cells. Alpha particles have…