• ²²⁵Ac-satoreotide is a first-in-class Actinium-labelled somatostatin receptor 2 antagonist targeting extensive-stage Small Cell Lung Cancer or Merkel Cell Carcinoma
• Orphan Drug Designation follows outstanding preclinical data and FDA IND clearance
• Phase I/II human trials set to commence in Q1 2025 as a ‘theranostic’ targeted radionuclide treatment

Berlin, Germany, 6 February 2025 – Ariceum Therapeutics (Ariceum), a private biotech company developing radiopharmaceutical products for the diagnosis and treatment of certain hard-to-treat cancers, today announced that the U.S. Food and Drug Administration (FDA) has granted Orphan Drug Designation (ODD) to ²²⁵Ac-SSO110 (satoreotide) for the treatment of patients with Small Cell Lung Cancer (SCLC).

SCLC is a deadly condition that represents a significant unmet medical need due to the limited number of treatment options available to patients with this aggressive form of cancer. Two-thirds of SCLC patients are diagnosed at an advanced stage where the disease has already spread significantly, resulting in a poor prognosis and a 5-10% overall five-year survival rate. Ariceum will commence Phase I/II human clinical development of ²²⁵Ac-satoreotide under the trial name, SANTANA-225 in Q1 2025.

Manfred Rüdiger, Chief Executive Officer at Ariceum Therapeutics, said: “Receiving ODD for ²²⁵Ac-satoreotide is a recognition of its potential as a treatment option for patients with SCLC and an important regulatory milestone for Ariceum. The FDA’s ODD will support our objective to accelerate the development of ²²⁵Ac-satoreotide through human trials to provide a potentially life-saving therapy to patients with limited alternatives.”

The FDA provides ODD to drugs and biologics that demonstrate potential for the diagnosis and/or treatment of rare diseases or conditions that affect fewer than 200,000 people in the U.S. The designation provides development and commercial incentives for designated compounds and medicines, including eligibility for seven years of market exclusivity in the U.S. after product approval, FDA assistance in clinical trial design, and an exemption from FDA user fees.

In October 2024, Ariceum published outstanding preclinical data demonstrating the significant potential of ²²⁵Ac-satoreotide to outperform SSTR2 targeting agonists. ²²⁵Ac-satoreotide showed a high frequency of complete durable responses and 100% survival supporting advanced clinical development in SCLC, MCC, and other aggressive cancers. ²²⁵Ac-satoreotide in combination with its companion patient selection tracer 68Ga-SSO120 is being developed as a ‘theranostic pair’ for the combined diagnosis and targeted radionuclide treatment of multiple indications expressing SSTR2, such as SCLC, MCC, and other aggressive, hard-to-treat cancers.

-Ends-

About Ariceum Therapeutics
Ariceum Therapeutics is a private, clinical stage radiopharmaceutical company focused on the diagnosis and precision treatment of certain neuroendocrine and other aggressive, hard-to-treat cancers. The name Ariceum is an anagram of ‘Marie Curie’ whose discovery of radium and polonium have been huge contributions to finding treatments for cancer.

Ariceum’s lead targeted systemic radiopharmaceutical candidate, SSO110 (“satoreotide”) labelled with Lutetium-177 (¹⁷⁷Lu) and Actinium-255 (²²⁵Ac) is an antagonist of the somatostatin type 2 (SSTR2) receptor which is overexpressed in aggressive neuroendocrine tumours (NETs) such as small cell lung cancer (SCLC) or Merkel Cell Carcinoma (MCC), all of which have limited treatment options and poor prognosis. Satoreotide is being developed as a ‘theranostic pair’ for the combined diagnosis and targeted radionuclide treatment of these tumours. Ariceum is also developing a radiolabelled PARP-inhibitor (ATT001), currently in Phase 1 clinical development under the trial name CITADEL-123. ATT001 was part of the acquisition of Theragnostics Ltd which was closed in June 2023.

Ariceum Therapeutics, launched in 2021, acquired all rights to satoreotide from Ipsen, which has remained a shareholder of the Company. Ariceum is headquartered in Berlin, with operations in Germany, Switzerland, Australia, the United Kingdom, and the United States.

Ariceum is led by a highly experienced management team and supported by specialist investors including EQT Life Sciences (formerly LSP), HealthCap, Pureos Bioventures, Andera Partners, and Earlybird Venture Capital. For further information, please visit www.ariceum-therapeutics.com.

For further information, please contact:

Ariceum Therapeutics
Manfred Rüdiger, CEO
Email: info@ariceum-therapeutics.com

Optimum Strategic Communications
Zoe Bolt, Charlotte Hepburne-Scott, Elena Bates
Tel: +44 (0) 20 3882 9621
Email: ariceum@optimumcomms.com

 

Berlin, Germany / Garching / Munich, January 13, 2025 – Ariceum Therapeutics (Ariceum), a private biotech company developing radiopharmaceutical products for the diagnosis and treatment of certain hard-to-treat cancers, and ITM Isotope Technologies Munich SE (ITM), a leading radiopharmaceutical biotech company, today announced the execution of a supply agreement for non-carrier-added (n.c.a.) Actinium-225 (Ac-225) to support the development of Ariceum’s novel targeted radiopharmaceutical therapies (RPT) pipeline, including lead radiopharmaceutical drug, satoreotide for the treatment of aggressive, difficult-to-treat cancers.

Under the terms of the agreement, ITM will supply the therapeutic medical radioisotope, Ac-225, produced by Actineer™ Inc, ITM’s joint venture company with Canadian Nuclear Laboratories, for use in Ariceum’s Actinium-based pipeline candidates. Actineer is advancing cutting-edge technologies to secure and expand its supply chain and produce industrial-scale quantities of Ac-225 at rapid speed by irradiating Radium-226 (Ra-226) in cyclotrons to meet the growing demand for this promising medical radioisotope on a global scale. Additional details of the supply agreement have not been disclosed.

“Securing a reliable and plentiful supply of n.c.a. Ac-225 is critical to our efforts in developing innovative cancer treatments with our pipeline of novel targeted radiopharmaceuticals,” commented Manfred Rüdiger, Chief Executive Officer at Ariceum Therapeutics. “Our agreement with ITM and its joint venture company Actineer supports our access to valuable resources needed to explore the full potential of Ac-225 in unlocking and advancing new Targeted Alpha Therapy approaches for patients living with difficult-to-treat cancers.”

Ac-225 is a rare medical radioisotope used in RPTs for the treatment of various cancer indications. It emits high-energy alpha particles with a short penetration range in tissue, enabling precise targeting of tumor cells. This unique quality has made Ac-225 an increasingly sought-after resource in the field, with growing demand. Its natural scarcity and manufacturing complexities have contributed to critical shortages that have threatened the development of novel radiopharmaceuticals that have the potential to treat challenging cancer indications.

“We value our partnership with Ariceum which marks a significant step forward in advancing our mission to provide this critical medical radioisotope to the radiopharmaceutical industry,” said Dr. Andrew Cavey, Chief Executive Officer at ITM. “With our extensive experience in the production and supply of Lutetium-177, we are well-equipped to apply that expertise to Actinium-225 via our joint venture, Actineer. Our agreement with Ariceum strengthens our commitment to advancing innovative solutions for cancer treatment and to meeting the needs of our partners and people living with cancer worldwide.”

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About Ariceum Therapeutics
Ariceum Therapeutics is a private, clinical stage radiopharmaceutical company focused on the diagnosis and precision treatment of certain neuroendocrine and other aggressive, hard-to-treat cancers. The name Ariceum is an anagram of ‘Marie Curie’ whose discovery of radium and polonium have been huge contributions to finding treatments for cancer.

Ariceum’s lead targeted systemic radiopharmaceutical candidate, 177Lu-satoreotide tetraxetan (“satoreotide”), is an antagonist of the somatostatin type 2 (SSTR2) receptor which is overexpressed in aggressive neuroendocrine tumours (NETs) such as small cell lung cancer (SCLC) or Merkel Cell Carcinoma (MCC), all of which have limited treatment options and poor prognosis. Satoreotide is being developed as a ‘theranostic pair’ for the combined diagnosis and targeted radionuclide treatment of these tumours. Ariceum is also developing a radiolabelled PARP-inhibitor (ATT001), currently in Phase 1 clinical development under the trial name CITADEL-123. ATT001 was part of the acquisition of Theragnostics Ltd which was closed in June 2023.

Ariceum Therapeutics, launched in 2021, acquired all rights to satoreotide from Ipsen, which has remained a shareholder of the Company. Ariceum is headquartered in Berlin, with operations in Germany, Switzerland, Australia, the United Kingdom, and the United States.

Ariceum is led by a highly experienced management team and supported by specialist investors including EQT Life Sciences (formerly LSP), HealthCap, Pureos Bioventures, Andera Partners, and Earlybird Venture Capital. For further information, please visit www.ariceum-therapeutics.com.

About ITM Isotope Technologies Munich SE
ITM, a leading radiopharmaceutical biotech company, is dedicated to providing a new generation of radiomolecular precision therapeutics and diagnostics for hard-to-treat tumors. We aim to meet the needs of cancer patients, clinicians and our partners through excellence in development, production and global supply. With improved patient benefit as the driving principle for all we do, ITM advances a broad precision oncology pipeline, including multiple phase III studies, combining the company’s high-quality radioisotopes with a range of targeting molecules. By leveraging our two decades of pioneering radiopharma expertise, central industry position, and established global network, ITM strives to provide patients with more effective targeted treatment to improve clinical outcome and quality of life. www.itm-radiopharma.com

About Actineer, Inc.
Actineer™ Inc. is a joint venture company between Canadian Nuclear Laboratories (CNL) and ITM Isotope Technologies Munich SE (ITM) dedicated to advancing Ac-225 technologies, quickly securing supply, and producing industrial-scale quantities of this valuable, rare medical radioisotope for the treatment of cancer. Founded in October 2023, Actineer™ Inc. together with its strong supply chain collaborators seeks to progress Ac-225 development, production, and processing technologies. It has established short-term production capabilities that is expected to lead to significantly boosting international supplies, while working long-term towards the construction of a new Actinium Production Facility (APF) in Canada. The joint venture’s mission is to fulfil the unmet global manufacturing and production needs of this coveted radioisotope with significant potential in the fight against cancer.

For further information, please contact:

Ariceum Therapeutics
Manfred Rüdiger, CEO
Email: info@ariceum-therapeutics.com

Optimum Strategic Communications
Zoe Bolt, Charlotte Hepburne-Scott, Elena Bates
Tel: +44 (0) 20 3882 9621
Email: ariceum@optimumcomms.com

ITM Contact
Corporate Communications
Kathleen Noonan / Julia Westermeir
Phone: +49 89 329 8986 1500
Email: communications@itm-radiopharma.com

Investor Relations
Ben Orzelek
Phone: +49 89 329 8986 1009
Email: investors@itm-radiopharma.com

• NorthStar will supply non-carrier added Actinium-225, a radionuclide, for use with Ariceum’s first-in-class radiopharmaceutical drug, satoreotide

Berlin, Germany, and Beloit, Wisconsin, 11 December 2024 – Ariceum Therapeutics, a private biotech company developing radiopharmaceutical products for the diagnosis and treatment of certain hard-to-treat cancers, and NorthStar Medical Radioisotopes, LLC, a global innovator in the development, production and commercialization of radiopharmaceuticals used for therapeutic applications and medical imaging, today announced the signing of a supply agreement for the therapeutic medical radioisotope, Actinium-225 (Ac-225).

Under the terms of the agreement, NorthStar will provide Ariceum with non-carrier-added (n.c.a.), high purity, Ac-225, a rare and critical isotope that is in high demand, providing Ariceum with an additional clinical source of supply for its evolving pipeline development programs. Ariceum will use NorthStar’s Ac-225 to radiolabel its proprietary peptide (SS0110) satoreotide, a first-in-class antagonist of the somatostatin receptor 2 (SSTR2). Satoreotide is being developed as a ‘theranostic pair’ for the combined diagnosis and targeted radionuclide treatment of multiple indications expressing SSTR2, such as small cell lung cancer (SCLC), pancreatic cancers, Merkel Cell Carcinoma, and other aggressive cancers.

Manfred Rüdiger, Chief Executive Officer of Ariceum Therapeutics, commented: “Satoreotide is the first Ac-225 labelled antagonist of the SSTR2 receptor targeting SCLC. The compound is scheduled to enter clinical development in the US as part of a transatlantic trial soon. The compound has demonstrated its potential as a Lutetium-177-labelled version in our ongoing Phase 1b clinical study in end stage-SCLC. Based on NorthStar’s industry leadership and commercial expertise in cutting-edge, accelerator-based radioisotope production technology, we believe that they are a reliable partner to meet Ariceum’s specific needs. In partnership with NorthStar, we look forward to progressing our clinical studies with Ac-225 and accelerating our future commercialization opportunities as we seek to deliver targeted theranostic treatments for patients.”

“Ariceum’s impressive development portfolio is focused on very aggressive, difficult-to-treat cancers and its early trial results are very exciting,” said Frank Scholz, President and Chief Executive Officer of NorthStar. “At NorthStar, our goal is to reduce or eliminate concerns about adequate availability of Ac-225 for clinical trials and patient medicines, which have held back exploration of powerful new pathways to attack these diseases for the millions of patients who today have limited treatment options available. We are proud to use our expertise and capabilities to provide innovative companies like Ariceum with high purity, n.c.a. Ac-225, that will help make potential new treatment therapies a prospect for the benefit of patients.”

-Ends-

CONTACTS:

For Ariceum Therapeutics
Manfred Rüdiger, CEO
info@ariceum-therapeutics.com

Optimum Strategic Communications
Zoe Bolt, Charlotte Hepburne-Scott, Elena Bates
Tel: +44 (0) 20 3882 9621
ariceum@optimumcomms.com

For NorthStar Medical Radioisotopes, LLC
Corporate:
Alison Hess
Vice President Chief of Staff
Tel : +1 608-295-9806
ahess@northstarnm.com

Investor Relations:
Paul Estrem
Executive Vice President and Chief Financial Officer
Tel: + 1 608-987-8318

About Ariceum Therapeutics, GmbH
Ariceum Therapeutics (Ariceum) is a private, clinical stage radiopharmaceutical company focused on the diagnosis and precision treatment of certain neuroendocrine and other aggressive, hard-to-treat cancers. The name Ariceum is an anagram of ‘Marie Curie’ whose discovery of radium and polonium have been huge contributions to finding treatments for cancer.

Ariceum’s lead targeted systemic radiopharmaceutical product, 177Lu-satoreotide tetraxetan (“satoreotide”), is an antagonist of the somatostatin type 2 (SSTR2) receptor which is overexpressed in neuroendocrine tumours (NETs) and some aggressive cancers such as small cell lung cancer (SCLC), or Merkel Cell Carcinoma (MCC), all of which have few treatment options and poor prognosis. Satoreotide is being developed as a ‘theranostic pair’ for the combined diagnosis and targeted radionuclide treatment of these tumours. Ariceum is also developing a radiolabelled PARP-inhibitor (ATT001), currently in Phase 1 clinical development under the trial name CITADEL-123. ATT001 was part of the acquisition of Theragnostics Ltd which was closed in June 2023.

Ariceum Therapeutics, launched in 2021, acquired all rights to satoreotide from Ipsen. Ipsen remains a shareholder in the Company. Ariceum is headquartered in Berlin, with operations in Germany, Switzerland, Australia, United Kingdom and United States of America and with activities currently across the globe.

Ariceum is led by a highly experienced management team and supported by specialist investors including EQT Life Sciences (formerly LSP), HealthCap, Pureos Bioventures, Andera Partners and Earlybird Venture Capital. For further information, please visit www.ariceum-therapeutics.com.

About NorthStar Medical Radioisotopes, LLC (NorthStar)
NorthStar Medical Radioisotopes is a commercial-stage radiopharmaceutical company at the forefront of advancing patient care by utilizing novel technologies to produce commercial-scale radioisotopes that, once attached to a molecule, have the ability to detect and treat cancer and other serious diseases. NorthStar’s expanding industry-leading position in the emerging field of radiopharmaceutical therapy is supported by its unique capabilities in the sophisticated production of radioisotopes, proven management team, and state-of-the-art, environmentally preferable technologies. NorthStar routinely produces copper-67 (Cu-67) and is poised to be the first commercial-scale producer of non-carrier-added (n.c.a.) actinium-225 (Ac-225). The Company’s Radiopharmaceutical Contract Development and Manufacturing Organization (CDMO) services unit provides customized service offerings and specialized radiopharmaceutical expertise to help biopharmaceutical companies rapidly advance their development and commercial programs. For more information about NorthStar’s comprehensive portfolio and patient-focused services, visit: www.northstarnm.com.

• ²²⁵Ac-Satoreotide is a first-in-class somatostatin receptor 2 antagonist targeting extensive stage small cell lung cancer and is the first antagonist labelled with ²²⁵Ac to enter clinical development
• Satoreotide expressed a superior pharmacokinetic profile relative to DOTA-TATE with a higher pre-clinical anti-tumour efficacy, irrespective of radionuclide used
• 100% survival with a single dose of 30 kBq ²²⁵Ac-satoreotide but not with ²²⁵Ac-DOTA-TATE

Berlin, Germany, 22 October 2024 – Ariceum Therapeutics (Ariceum), a private biotech company developing radiopharmaceutical products for the diagnosis and treatment of certain hard-to-treat cancers, today announces that it presented data on its proprietary radiolabelled peptide SS0110 (satoreotide), a first-in-class antagonist of the somatostatin receptor 2 (SSTR2), at this year’s European Association of Nuclear Medicine (EANM) Annual Conference, held in Hamburg, Germany from 19-23 October 2024.

The Top-Rated Oral Presentation (TROP) entitled ‘²²⁵Ac-SSO110 induces long-lasting anti-tumour responses in contrast to ²²⁵Ac-DOTA-TATE and ¹⁶¹Tb-DOTA-TATE in the treatment of SSTR2-positive tumour xenografts’, details the anti-tumour efficacy of different radiolabelled satoreotide antagonists (²²⁵Ac, ¹⁶¹Tb, ¹⁷⁷Lu-labelled SSO110) versus respective DOTA-TATE agonists (²²⁵Ac- and ¹⁶¹Tb-labelled DOTA-TATE) in mice engrafted with SSTR2 positive xenografts of small cell lung cancer (SCLC) and pancreatic cancer using clinically relevant associated dose ranges.

Results demonstrate that ²²⁵Ac-satoreotide shows the strongest anti-tumoural effect in vivo at a low single dose when evaluating satoreotide and DOTA-TATE radiolabelled with different radionuclides. Irrespective of the radionuclides used, satoreotide demonstrated a higher pre-clinical anti-tumour efficacy when compared to DOTA-TATE which was less potent and required increased dose levels. Satoreotide was well tolerated across all dose levels and with all used radionuclides. These comparisons between satoreotide and DOTA-TATE will facilitate and guide further clinical development of satoreotide across multiple indications expressing SSTR2, such as SCLC, pancreatic cancers and Merkel Cell Carcinoma (MCC).

Previous comparisons between satoreotide and DOTA-TATE demonstrated that antagonist, ²²⁵Ac-satoreotide, is multiple times more potent than SSTR2 agonist, ²²⁵Ac-DOTA-TATE, signifying a durable complete response in standard murine xenograft models of SCLC in animal models, versus tumour growth delay.

Ariceum had previously shown at the Society of Nuclear Medicine and Molecular Imaging (SNMMI) Annual Meeting 2024 that ²¹²Pb was not seen to be more potent than Lutetium or Terbium but caused more side effects and hence was not further pursued.

Manfred Rüdiger, Chief Executive Officer at Ariceum Therapeutics, said: “These results provide strong evidence for satoreotide and its potential to clinically outperform SSTR2 targeting agonists, by demonstrating significantly better efficacy in tumour growth control, up to complete tumour eradication depending on isotope used. In addition, when a single dose of 30 kBq ²²⁵Ac-satoreotide was administered, we observed high frequency of complete durable responses and 100% survival which strongly supports further clinical development for the treatment of SCLC, MCC and other cancers.”

Details of the oral presentation are as follow:

Title: ²²⁵Ac-SSO110 induces long-lasting anti-tumour responses in contrast to ²²⁵Ac-DOTA-TATE and 161Tb-DOTA-TATE in the treatment of SSTR2-positive tumour xenografts

Presenting Author: Prachi Desai, Scientist at Ariceum Therapeutics

Session Number: 1204

Session Title: M2M Track – TROP Session: Radiopharmaceutical Sciences + Translational Molecular Imaging & Therapy Committee: From Radionuclide to Clinical Translation

Oral Presentation Date & Time: Tuesday 22 October 2024, 09:00 AM – 09:10 AM CEST

Abstract Authors: Prachi Desai, Manuel Sturzbecher-Hoehne, Dennis Mewis, Manfred Ruediger & Anika Jaekel of Ariceum Therapeutics

Session Date & Time: Tuesday 22 October 2024, 08:00 AM – 09:30 AM CEST

Location: Session Hall X1-X4

Abstracts are available in the September edition of Springer’s European Journal of Nuclear Medicine and Molecular Imaging (EJNMMI) abstract book here and on the Ariceum website here.

-Ends-

For further information, please contact:

Ariceum Therapeutics
Manfred Rüdiger, CEO
Email: info@ariceum-therapeutics.com

Optimum Strategic Communications
Zoe Bolt, Charlotte Hepburne-Scott, Elena Bates
Tel: +44 (0) 20 3882 9621
Email: ariceum@optimumcomms.com

 

Notes to Editors

About Ariceum Therapeutics

Ariceum Therapeutics (Ariceum) is a private, clinical stage radiopharmaceutical company focused on the diagnosis and precision treatment of certain neuroendocrine and other aggressive, hard-to-treat cancers. The name Ariceum is an anagram of ‘Marie Curie’ whose discovery of radium and polonium have been huge contributions to finding treatments for cancer.

Ariceum’s lead targeted systemic radiopharmaceutical product, ¹⁷⁷Lu-satoreotide tetraxetan (“Satoreotide”), is an antagonist of the somatostatin type 2 (SSTR2) receptor which is overexpressed in neuroendocrine tumours (NETs) and some aggressive cancers such as small cell lung cancer (SCLC), or Merkel Cell Carcinoma (MCC), all of which have few treatment options and poor prognosis. Satoreotide is being developed as a ‘theranostic’ pair for the combined diagnosis and targeted radionuclide treatment of these tumours. Ariceum is also developing a radiolabelled PARP-inhibitor (ATT001), currently in Phase 1 clinical development under the trial name CITADEL-123. ATT001 was part of the acquisition of Theragnostics Ltd which was closed in June 2023.

Ariceum Therapeutics, launched in 2021, acquired all rights to Satoreotide from Ipsen. Ipsen remains a shareholder in the Company. Ariceum is headquartered in Berlin, with operations in Germany, Switzerland, Australia, United Kingdom and United States of America and with activities currently across the globe.

Ariceum is led by a highly experienced management team and supported by specialist investors including EQT Life Sciences (formerly LSP), HealthCap, Pureos Bioventures, Andera Partners and Earlybird Venture Capital. For further information, please visit  www.ariceum-therapeutics.com.

About European Association of Nuclear Medicine (EANM)
The European Association of Nuclear Medicine (EANM) is a non-profit organization that promotes nuclear medicine and aims to improve public health. The EANM’s mission is to advance nuclear medicine through personalized healthcare, innovation in diagnosis and treatment, and raising awareness of nuclear medicine.

• SST2 antagonist, ²²⁵Ac-SSO110 (satoreotide), is multiple times more potent than SST2 agonist, ²²⁵Ac-DOTATATE
• Satoreotide demonstrated durable complete response in standard murine xenograft models of Small Cell Lung Cancer in animal models, versus tumor growth delay with ²²⁵Ac-DOTATATE

Berlin, Germany, 10 June, 2024 – Ariceum Therapeutics (Ariceum), a private biotech company developing radiopharmaceutical products for the diagnosis and treatment of certain hard-to-treat cancers, today announces that it will be presenting a poster demonstrating the efficacy of its somatostatin receptor 2 (SST2) antagonist, SS0110 (satoreotide), relative to SST2-targeting agonists, at this year’s Society of Nuclear Medicine and Molecular Imaging (SNMMI) Annual Meeting being held 8-11 June 2024 in Toronto, Canada.

The poster presentation entitled ‘[²²⁵Ac]Ac-SSO110 and [¹⁷⁷Lu]Lu-SSO110 demonstrate significantly better efficacy than [²²⁵Ac]Ac-DOTA-TATE in the treatment of SST2-positive tumor xenografts’ compares satoreotide with the SST2 agonist, ²²⁵Ac-DOTATATE, and reveals that single doses of 20 MBq ¹⁷⁷Lu-satoreotide or 30 kBq ²²⁵Ac-satoreotide induce significantly better efficacy than a single dose of 30 kBq ²²⁵Ac-DOTATATE.  Most remarkably, 30 kBq ²²⁵Ac-satoreotide induced complete tumor regression in the NCI-H69 model, something not observed with the same or higher doses of ²²⁵Ac-DOTATATE.

These data highlight the significantly higher tumor uptake and longer tumor retention leading to a higher tumor to background and tumor to kidney ratios of satoreotide which translates into higher pre-clinical efficacy than SST2-targeting agonists when labelled with isotopes, ²²⁵Ac-satoreotide and ¹⁷⁷Lu-satoreotide. This demonstrates the potential for satoreotide to clinically outperform SST2-targeting agonists and strongly supports its further clinical development for the treatment of SST2 positive tumors such as Small Cell Lung Cancer (SCLC) and Merkel Cell Carcinoma (MCC).

Manfred Rüdiger, Chief Executive Officer at Ariceum Therapeutics, said: “With this significant data we demonstrate that satoreotide has the potential to be a game changer for the treatment of SCLC and MCC. Satoreotide is multiple times more potent than DOTATATE, irrespective of the isotope, and this confirms the superiority of SST2 antagonist over agonist. We look forward to presenting our findings at this year’s SNMMI meeting.”

Details of the poster presentation are as follow:

Title: [²²⁵Ac]Ac-SSO110 and [¹⁷⁷Lu]Lu-SSO110 demonstrate significantly better efficacy than [²²⁵Ac]Ac-DOTA-TATE in the treatment of SST2-positive tumor xenografts

Authors: Anika Jaekel, Prachi Desai, Germo Gericke, Manuel Sturzbecher-Hoehne, Dennis Mewis & Manfred Rüdiger

Presenter: Anika Jaekel, Senior Director, Head of Translational Biology and Non-Clinical Pharmacology at Ariceum Therapeutics

Session:  MTA07 POPs/Meet the Author: Oncology, Basic & Translational 2
Session Date and Time:  Monday, June 10, 2024, 10:00 – 11:15 DST
Abstract ID: 242038

-Ends-

For further information, please contact:

Ariceum Therapeutics
Manfred Rüdiger, CEO
Email: info@ariceum-therapeutics.com

Optimum Strategic Communications
Zoe Bolt, Charlotte Hepburne-Scott, Elena Bates
Tel: +44 (0) 20 3882 9621
Email: ariceum@optimumcomms.com

 

Notes to Editors

About Ariceum Therapeutics

Ariceum Therapeutics (Ariceum) is a private, clinical stage radiopharmaceutical company focused on the diagnosis and precision treatment of certain neuroendocrine and other aggressive, hard-to-treat cancers. The name Ariceum is an anagram of ‘Marie Curie’ whose discovery of radium and polonium have been huge contributions to finding treatments for cancer.

Ariceum’s lead targeted systemic radiopharmaceutical product, 177Lu-satoreotide tetraxetan (“Satoreotide”), is an antagonist of the somatostatin type 2 (SSTR2) receptor which is overexpressed in neuroendocrine tumours (NETs) and some aggressive cancers such as small cell lung cancer (SCLC), or Merkel Cell Carcinoma, all of which have few treatment options and poor prognosis. Satoreotide is being developed as a ‘theranostic’ pair for the combined diagnosis and targeted radionuclide treatment of these tumours. Ariceum is also developing a radiolabelled PARP-inhibitor (ATT001), which is slated to enter clinical development in 2024. ATT001 was part of the acquisition of Theragnostics Ltd which was closed in June 2023.

Ariceum Therapeutics, launched in 2021, acquired all rights to Satoreotide from Ipsen. Ipsen remains a shareholder in the Company. Ariceum is headquartered in Berlin, with operations in Germany, Switzerland, Australia, United Kingdom and United States of America and with activities currently across the globe.

Ariceum is led by a highly experienced management team and supported by specialist investors including EQT Life Sciences (formerly LSP), HealthCap, Pureos Bioventures, Andera Partners and Earlybird Venture Capital. For further information, please visit  www.ariceum-therapeutics.com.

About SNMMI

The Society of Nuclear Medicine and Molecular Imaging (SNMMI), headquartered in Reston, VA, is a nonprofit scientific and professional organization that promotes the science, technology and practical application of nuclear medicine and molecular imaging.