Alpha-emitter PRRT: Phase 1/2 Study of AlphaMedix™ in Adult Subjects With SSTR positive NET

Alpha-emitter PRRT: Phase 1/2 Study of AlphaMedix™ in Adult Subjects With SSTR positive NET

Clinical Trials
Ebrahim S Delpassand, Izabela Tworowska, Rouzbeh Esfandiari, Julien Torgue, Jason Hurt, Afshin Shafie and Rodolfo Núñez Journal of Nuclear Medicine, January 2022, jnumed.121.263230; DOI: https://doi.org/10.2967/jnumed.121.263230 Trial SummaryAlphaMedix™ (²¹²Pb-DOTAMTATE) is a radiotherapeutic drug indicated in subjects with unresectable, metastatic somatostatin receptor (SSTR) positive neuroendocrine tumors (NETs). Because 212Pb is an in vivo generator of alpha particles, it is particularly suitable for SSTR therapy applications, i.e. it's a type of PRRT. This drug addresses an unmet need in the field of peptide receptor radionuclide therapy (PRRT) for NETs. Substitution of an alpha emitter (²¹²Pb) for the beta emitters currently being used (i.e., 177Lu or 90Y) will provide significantly higher Linear Energy Transfer (LET) and a shorter path length. Higher LET particles should cause more tumor cell death. A shorter path length should result in less collateral damage to the normal tissue and therefore fewer…
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Clinical Trial:  Phase 1b/3 Targeted Alpha-Emitter PRRT RYZ101 (Ac225)

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

Clinical Trials
What is RYZ101? RYZ101 is an investigational targeted alpha-emitter radiopharmaceutical therapy, designed to deliver a highly potent radioisotope, Actinium-225 (Ac225), to tumors expressing SSTR2. RYZ101 is being evaluated in clinical studies for patients with SSTR+ GEP-NETs who have previously been treated with Lu177-based somatostatin therapies.  There is also a plan to trial the drug in patients with extensive stage (ES) small cell lung cancer (SCLC), a type of lung Neuroendocrine Carcinoma. Where did this news come from? RayzeBio, Inc., a targeted radiopharmaceutical company developing an innovative pipeline against validated solid tumor targets, today announced significant progress in the clinical development of its lead product candidate, RYZ101. RYZ101 is an investigational, targeted radiopharmaceutical drug designed to deliver Actinium-225 (Ac225), a highly potent alpha-emitting radioisotope, to solid tumors expressing the somatostatin receptor…
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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

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
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. [caption id="attachment_12014" align="aligncenter" width="1024"] Click on the photo to read[/caption] Read more about Capecitabine (combo with Temozolomide) by clicking here or on the photo below. [caption id="attachment_33477" align="aligncenter" width="640"] Click on the photo to read[/caption] The abstract from the Indian study is posted and cited below.  Abstract Rationale: Although the short-term results…
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Neuroendocrine Tumors: Targeted Therapies – Update from NET Specialist Diane Reidy-Lagunes, MD, Memorial Sloan-Kettering Cancer Center – August 2021

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

Clinical Trials, Patient Advocacy, Survivorship, Treatment
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) Episode 2 - Neuroendocrine Tumor Pathogenesis and Molecular Testing Expert insight on the pathogenesis of neuroendocrine tumors and the best use of molecular testing to inform treatment decisions.Neuroendocrine Tumor Pathogenesis…
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Neuroendocrine Tumour (VMT-𝛼-NET) programs

Neuroendocrine Tumour (VMT-𝛼-NET) programs

Clinical Trials
Update 3rd October 2022An announcement from Viewpoint Molecular Targeting indicates the U.S. Food and Drug Administration (FDA) has granted fast track designation for the development of [212Pb]VMT-α-NET for treatment of patients with SSTR2-positive unresectable or metastatic neuroendocrine tumors (NETs) (including GEP-NETs or bronchial NETs and pheochromocytomas and paragangliomas).This does not mean the drug is approved for routine use, it just means the drug development has been given special treatment based on closer collaboration with FDA to ensure a smoother path when required.  Clearly the drug still needs to meet FDA criteria along the way.  Read the announcement here. Update 10 September 2021Viewpoint Molecular Targeting (TM) Receives FDA Clearance of Investigational New Drug Application for Phase 1 Imaging Study for VMT-a-NET for Neuroendocrine TumorsEdit:  We await the results as at 3rd October…
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Targeted Alpha-emitter Therapy (TAT) – the wave of the future in nuclear oncology/PRRT?

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

Clinical Trials
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…
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