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Hemogenyx Pharmaceuticals PLC - Second Patient Passes Initial Safety Tests

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Hemogenyx Pharmaceuticals (HOPHF) has announced successful safety evaluation of the second patient treated with HG-CT-1, their proprietary CAR-T therapy for relapsed/refractory acute myeloid leukemia (R/R AML) in adults. The Phase I dose-escalation trial showed favorable safety profile and early efficacy signs. The study includes secondary endpoints evaluating overall survival, progression-free survival, and response duration. Manufacturing for a third patient's treatment is underway. CEO Dr. Vladislav Sandler emphasized the significance of this milestone in addressing aggressive leukemia treatment, highlighting the therapy's potential for patients with limited options.
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Positive

  • Second patient successfully passed initial safety evaluation for HG-CT-1 CAR-T therapy
  • Early indications of clinical efficacy observed in the treatment
  • Manufacturing process for third patient treatment already underway
  • Treatment demonstrates favorable safety profile in Phase I trial

Negative

  • Phase I trial still in early stages with only two patients treated
  • Long-term efficacy data not yet available
  • Secondary endpoints results pending further patient monitoring

Second Patient Treated with HG-CT-1 CAR-T Therapy Successfully Passes Initial Safety Evaluation

LONDON, UNITED KINGDOM / ACCESS Newswire / June 3, 2025 / Hemogenyx Pharmaceuticals plc is pleased to announce that the second patient has been successfully treated in the ongoing Phase I clinical trial of HG-CT-1, the Company's proprietary Chimeric Antigen Receptor T-cell (CAR-T) therapy for relapsed/refractory acute myeloid leukemia (R/R AML) in adults.

The treatment was well tolerated and met the trial's predefined initial safety criteria. Encouragingly, early indications of clinical efficacy are evident. The patient will continue to be monitored according to the FDA-approved trial protocol to assess whether the study's secondary endpoints are achieved.

Manufacturing of HG-CT-1 for the treatment of a third patient is currently underway.

The Phase I trial is a dose-escalation study designed to evaluate the safety and tolerability of HG-CT-1. In addition to safety, the trial includes several key secondary endpoints:

  • Assessing the efficacy of HG-CT-1 based on AML-specific response criteria

  • Evaluating overall survival

  • Measuring progression-free survival

  • Determining duration of response in patients demonstrating clinical benefit

Data related to these secondary endpoints, including efficacy, durability, and overall clinical outcomes, will be collected over time through continued follow-up of the treated patient. These secondary endpoints are critical for assessing the potential clinical impact of HG-CT-1 in a patient population with limited remaining treatment options.

Further updates will be provided as the trial progresses.

Dr Vladislav Sandler, CEO & Co-Founder of Hemogenyx Pharmaceuticals, commented:
​"The successful treatment of the second patient represents a meaningful step forward for both Hemogenyx and for patients battling relapsed or refractory AML. We are encouraged by the favorable safety profile observed to date and by the early signs of efficacy. These results further validate the promise of HG-CT-1 as a novel treatment for one of the most aggressive and intractable forms of leukemia. We remain focused on advancing the clinical development of this therapy to address a critical unmet need, while also building long-term value for our shareholders."

Market Abuse Regulation (MAR) Disclosure

Certain information contained in this announcement would have been inside information for the purposes of Article 7 of Regulation No 596/2014 (as it forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018) until the release of this announcement.

Enquiries:

Hemogenyx Pharmaceuticals plc

https://hemogenyx.com

Dr Vladislav Sandler, Chief Executive Officer & Co-Founder

headquarters@hemogenyx.com

Peter Redmond, Director

peter.redmond@hemogenyx.com

SP Angel Corporate Finance LLP

Tel: +44 (0)20 3470 0470

Matthew Johnson, Vadim Alexandre, Adam Cowl

Peterhouse Capital Limited

Tel: +44 (0)20 7469 0930

Lucy Williams, Duncan Vasey, Charles Goodfellow

About Hemogenyx Pharmaceuticals plc

Hemogenyx Pharmaceuticals is a publicly traded company (LSE:HEMO) headquartered in London, with its US operating subsidiaries, Hemogenyx Pharmaceuticals LLC and Immugenyx LLC, located in New York City at its state-of-the-art research facility.

The Company is a clinical-stage biopharmaceutical group developing new medicines and treatments to treat blood and autoimmune diseases. Hemogenyx Pharmaceuticals is developing several distinct and complementary product candidates, as well as platform technologies that it uses as engines for novel product development.

This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact rns@lseg.com or visit www.rns.com.

SOURCE: Hemogenyx Pharmaceuticals PLC



View the original press release on ACCESS Newswire

FAQ

What are the results of HOPHF's second patient treated with HG-CT-1 CAR-T therapy?

The second patient successfully passed initial safety evaluation, with the treatment being well tolerated and showing early signs of clinical efficacy.

What is the purpose of Hemogenyx's HG-CT-1 CAR-T therapy clinical trial?

The Phase I trial aims to evaluate the safety and tolerability of HG-CT-1 for treating relapsed/refractory acute myeloid leukemia (R/R AML) in adults.

What are the secondary endpoints in HOPHF's HG-CT-1 clinical trial?

The secondary endpoints include assessing treatment efficacy, overall survival, progression-free survival, and duration of response in patients showing clinical benefit.

How many patients have been treated with Hemogenyx's HG-CT-1 therapy so far?

Two patients have been treated so far, with manufacturing underway for a third patient's treatment.

What type of cancer does Hemogenyx's HG-CT-1 therapy target?

HG-CT-1 targets relapsed/refractory acute myeloid leukemia (R/R AML) in adult patients.
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