Targeted alpha-emitter therapy (TAT) Archives

Tag: Targeted alpha-emitter therapy (TAT)

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 a high energy in the range of 5-9 MeV and at the same time a very short path length in human tissue below 0.1 mm, corresponding to less than 10 cell diameters. Consequently, the use of alpha emitters allows the specific targeting and killing of individual malignant cells, while minimizing the toxicity to surrounding healthy tissue. Is thought to be less toxic than regular PRRT using beta particles.

Examples include 212Pb-AR-RMX and 225Ac

26 Oct 2024

By Ronny Allan

10 Comments

PRRT – The Sequel? Alpha-emitter PRRT for Neuroendocrine Tumours (NET)

Clinical Trials and Research212Pb-AR-RMX, Ac-225, Advanced neuroendocrine cancer, Carcinoid tumour, Incurable cancer, Metastatic Neuroendocrine Cancer, Neuroendocrine, Neuroendocrine cancer, Nuclear medicine, Peptide receptor radionuclide therapy (PRRT), PRRT, Radioimmunotherapy, Radionuclide, Somatostatin analogues, Targeted alpha-emitter therapy (TAT)

Updated and reviewed June 2026. Alpha‑emitter PRRT is emerging as the next major evolution of peptide receptor radionuclide therapy. Instead of using a beta‑emitting isotope such as 177Lu, these new approaches use alpha‑particle–emitting isotopes like 212Pb or 225Ac. The goal is simple: deliver more powerful DNA‑damaging radiation directly into tumour cells while keeping the impact on surrounding tissues as low as possible. This is still experimental, but the science is compelling — and the early clinical signals are strong enough that alpha‑emitter PRRT is now considered one of the most important areas to watch in NET research. How alpha‑emitter PRRT…

10 Apr 2024

By Ronny Allan

1 Comment

Clinical Trials – 212Pb-DOTAMTATE (alpha-emitter) in Subjects With Somatostatin Receptor Positive Neuroendocrine Tumours

Clinical Trials and Research, Treatment212Pb, 212Pb-AR-RMX, Clinical trial, Peptide receptor radionuclide therapy (PRRT), PRRT, Targeted alpha-emitter therapy (TAT)

Update 2nd November 2025 - NANETS output. Efficacy, Safety of 212Pb-DOTAMTATE in PRRT-Naïve Patients With GEP-NETs This is a follow on from the 8th October 2025 update below. Commentary by Dr Mary Maluccio from NOLA NETs. The figures looks great and you can read it or listen to her talking. Click here for that. The phase 3 trials will be PRRT naive patients only (i.e. those who have had no previous PRRT (beta or alpha)). Update 8th October 2025 Press Release: AlphaMedixTM (212Pb-DOTAMTATE) achieved all primary efficacy endpoints in phase 2 study, demonstrating clinically meaningful benefits in patients with gastroenteropancreatic…

14 Sep 2022

By Ronny Allan

0 Comments

Clinical Trials – Targeted Alpha-Emitter PRRT RYZ101/RYZ401

Clinical Trials and Research225Ac, Ac-225, Advanced neuroendocrine cancer, Metastatic Neuroendocrine Cancer, Neuroendocrine carcinoma (NEC), Neuroendocrine tumour (NET), Peptide receptor radionuclide therapy (PRRT), PRRT, Small cell lung cancer (SCLC), Targeted alpha-emitter therapy (TAT)

Update – 1 April 2026 RYZ401: New Alpha‑Emitter Trial (PRRT‑Naïve Only) In January 2026, RayzeBio (now part of Bristol Myers Squibb) opened a new first‑in‑human trial for RYZ401, titled “Study of RYZ401 in Subjects With Solid Tumors Expressing SSTRs” (NCT07165132). This Phase 1/2 study aims to: determine the recommended Phase 2 dose (RP2D) define the optimal treatment schedule assess safety and tolerability evaluate early signs of efficacy The trial includes NETs and other SSTR‑expressing solid tumours, including meningioma. Important: RYZ401 excludes anyone who has ever received PRRT (Lu‑177 or Y‑90). This makes it a PRRT‑naïve trial. 1 April 2026: The…

27 Jul 2022

By Ronny Allan

0 Comments

Survival Outcomes in Metastatic Gastroenteropancreatic Neuroendocrine Tumor Patients receiving Concomitant 225Ac-DOTATATE Targeted Alpha Therapy and Capecitabine: A Real-world Scenario Management Based Long-term Outcome Study

Clinical Trials and Research225Ac, Gastro-entero-pancreatic neuroendocrine tumour (GEP-NET), Peptide receptor radionuclide therapy (PRRT), PRRT, Targeted alpha-emitter therapy (TAT)

Introduction I've written about both 225Ac-DOTATATE targeted alpha therapy (TAT) and Capecitabine before but never as a concomitant pair (combo). So, when this Indian study came up on my radar, I felt it was a useful addition to my website adding to my existing targeted alpha therapy portfolio of information. India appears to be using more of this type of PRRT than any other country. Read more about targeted alpha therapy by clicking here or on the photo below. Read more about Capecitabine (combo with Temozolomide) by clicking here or on the photo below. The abstract from the Indian study…

11 Sep 2021

By Ronny Allan

0 Comments

Neuroendocrine Tumors: Targeted Therapies – Update from NET Specialist Diane Reidy-Lagunes, MD, Memorial Sloan-Kettering Cancer Center – August 2021

Clinical Trials and Research, Patient Advocacy, Survivorship, TreatmentAdvanced neuroendocrine cancer, Afinitor, Biopsy, Carcinoid syndrome, Carcinoid tumour, Chemotherapy, Diagnosis, Everolimus, Ga68 PET/CT, Immunotherapy, Incurable cancer, Lanreotide, Liver embolization, Lung NETs, Lutathera, Metastatic Neuroendocrine Cancer, NET syndromes, Neuroendocrine cancer, Neuroendocrine carcinoma (NEC), Neuroendocrine neoplasm (NEN), Neuroendocrine tumour (NET), Octreotide, Pancreatic NET (PanNET), Peptide receptor radionuclide therapy (PRRT), Quality of LIfe (QoL), Small intestine NET (SI NET), Somatostatin analogues, Sunitinib (Sutent), Surufatinib, Targeted alpha-emitter therapy (TAT), Targeted therapy

Background. For those who want a quick run through of Neuroendocrine Tumors from diagnosis to selection of treatment, about the treatments themselves plus what is the Future Directions in the Management of Neuroendocrine Tumors. There are 8 episodes, and each is around 3-5 minutes long. I personally found them very useful and in a language understandable to patients. Great job by OncLive and Dr Reidy-Lagunes! Episode 1 - Understanding the Diagnosis and Prognosis of Neuroendocrine Tumors Diane Reidy-Lagunes, MD, provides an overview of neuroendocrine tumors, along with specific considerations for optimal diagnosis and prognostication. Understanding the Diagnosis and Prognosis of Neuroendocrine Tumors (onclive.com)…

10 May 2021

By Ronny Allan

3 Comments

Clinical Trial: [212Pb]VMT-α-NET Alpha-emitter – Phase 1/2a Clinical Trial

Clinical Trials and Research212Pb, Clinical trial, Neuroendocrine tumour (NET), Peptide receptor radionuclide therapy (PRRT), PRRT, Targeted alpha-emitter therapy (TAT), VMT-𝛼-NET

Update 21 June 2025. Perspective Therapeutics Commences Recruitment for [212Pb]VMT-α-NET in the Third Dose Escalation Cohort of its Ongoing Phase 1/2a Clinical Trial June 21, 2025 [212Pb]VMT-α-NET Phase 1/2a study is advancing into Cohort 3 with a fixed administered dose that is up to 20% higher (6 mCi) than the dose administered to patients in Cohort 2 Dosimetry sub-study analysis presented at the Society of Nuclear Medicine & Molecular Imaging (SNMMI) 2025 Annual Meeting to advance utility of dosimetry in clinical development when considered with clinical data On track to submit further clinical updates to scientific congresses in 2H 2025,…