PTG PropTech Group Limited

Gdańsk, Poland – 16 January 2024, 07:00 CET – PolTREG S.A. (Warsaw Stock Exchange: PTG), a clinical-stage biotechnology company in Europe developing cell therapies for use in a wide range of autoimmune diseases, announced it received a Notice of Allowance from the United States Patent and Trademark Office (USPTO), covering the manufacturing of T-regulatory cells (T-reg) to treat Type-1 Diabetes (T1D), and ways the therapy is administered. The US allowance constitutes an important addition to the intellectual property portfolio covering PolTREG’s autoimmune therapies.

“This USPTO decision complements our extensive intellectual property portfolio in the US and EU, paving the way for rapid, unimpeded commercialization of PolTREG’s cell therapies,” said PolTREG CEO Prof Piotr Trzonkowski. “Together with our 17 years of experience with patients at our own facilities in Poland, our dominant intellectual property portfolio demonstrates that we are leading pioneers in the field of T-reg therapeutics for autoimmune disorders. Indeed, we are the first ever to have administered Treg cell therapies to patients and the first company to begin receiving revenues from sales of our lead product; so far, 27 patients have been successfully treated commercially under the Hospital Exemption program in Poland.”

The US patent application covers the manufacturing of Treg cells, the formula of the cellular medicinal product containing Treg cells, and the ways the therapy is administered in T1D patients.

Many of PolTREG’s patent submissions are primary in the field, given that its team performed the first-in-human trials with Treg cell therapies in graft-versus-host disease in 2007-2009. PolTREG’s portfolio of patents and patent applications, in U.S. and Europe, includes the formulation of polyclonal and engineered Treg products, unique manufacturing elements of these cell therapies, details of patient recruitment and clinical efficacy. A number of the patents have been licensed from the Medical University of Gdańsk to PolTREG through Prof Trzonkowski, who was responsible at the university for the research behind these patents.

PolTREG boasts the most advanced pipeline for Treg cell therapies in autoimmune disease, with its flagship drug candidate, PTG-007, in clinical studies for two indications in T1D and two in Multiple Sclerosis (MS).

Upcoming milestones in 2024

T-regulatory cells (Treg) are the regulators of the immune system, seeing to it that other leukocytes do not attack the body’s own cells. PolTREG has developed patented processes by which it takes Treg from a patient’s own body, multiplies them ex vivo, and then injects them back in the patient’s own bloodstream for therapeutic effect. Treg therapeutics have advantages over traditional drugs in that they only act at the site of the inflammation, and switch off when the inflammation is over. A Phase 2 clinical study in T1D showed half of patients in clinical remission 24 months into the study, demonstrating the strong potential PolTREG’s cell therapies have to become powerful disease-modifying treatments.PolTREG (Gdańsk, Poland; WSA:PTG) is a global leader in developing autoimmune therapies based on T-regulatory cells (Tregs). Its lead product, PTG-007, autologous Treg treatment for early-onset Type-1 Diabetes (T1D) is ready to start Phase 2/3 clinical testing, upon partnership. The company will launch Phase 2 trials for PTG-007 to treat Multiple Sclerosis (MS), in the second half of 2024 for RRMS and PPMS. PolTREG also is developing engineered Tregs, including CAR-Tregs, antigen-specific Tregs and TCR-Tregs, all of which are in the preclinical stage. PolTREG  has completed four clinical trials with more than 100 patients treated with Tregs. For more information please visit www.poltreg.com.

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Important informationThe contents of this announcement include statements that are, or may be deemed to be, "forward-looking statements". These forward-looking statements can be identified by the use of forward-looking terminology, including the words "believes", "estimates," "anticipates", "expects", "intends", "may", "will", "plans", "continue", "ongoing", "potential", "predict", "project", "target", "seek" or "should", and include statements the Company makes concerning the intended results of its strategy. By their nature, forward-looking statements involve risks and uncertainties and readers are cautioned that any such forward-looking statements are not guarantees of future performance. The company's actual results may differ materially from those predicted by the forward-looking statements. The company undertakes no obligation to publicly update or revise forward-looking statements, except as may be required by law.

Attachment

• 20240116 PolTREG press release US patent_final

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