4SC AG: Paediatric Investigation Plan waiver for resminostat from the UK MHRA received

Planegg-Martinsried (pta007/15.04.2024/07:30 UTC+2)

• Removes the requirement to conduct paediatric clinical studies when the development of the medicine is not needed or is not appropriate for children
• This supports resminostat's Marketing Authorisation Application in the UK

Planegg-Martinsried, Germany, 15 April 2024– 4SC AG (4SC, FSE Prime Standard: VSC), a biotech company improving the lives of patients suffering with advanced-stage cutaneous T-cell lymphoma CTCL, today announces that it has received a Paediatric Investigation Plan (PIP) product-specific waiver from UK Medicines & Healthcare products Regulatory Agency (MHRA) for resminostat (Kinselby), an oral maintenance treatment for advanced stage CTCL.

The regulatory processes for the registration of new medicines with the MHRA require pharmaceutical companies to provide a PIP outlining their strategy for investigating the new medicine in a paediatric population. In some instances, a waiver may be granted when the development of a medicine for use in children is not needed or appropriate, as is the case for resminostat in advanced stage CTCL.

Jason Loveridge, Ph.D., CEO of 4SC, commented: "Receiving this waiver from the MHRA is a significant milestone as it brings 4SC a step closer to advancing our Marketing Authorisation Application for resminostat in the UK, avoiding the significant time and expense required to conduct a paediatric clinical study."

4SC filed its Marketing Authorisation Application with the European Medicines Agency (EMA) in February 2024, for resminostat for the treatment of CTCL in Europe. Filings for the UK and Switzerland are in preparation, and in addition, a pre-New Drug Application (NDA) meeting request was also submitted to the U.S. Food and Drug Administration (FDA) in February 2024.

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For further information, please contact:

4SC AG

ir-pr@4sc.com

Optimum Strategic Communications

Nick Bastin, Eleanor Cooper, Vareen Outhonesack

Phone: +44 20 3922 0891

4SC@optimumcomms.com

About 4SC

4SC AG is a clinical-stage biopharmaceutical company developing small-molecule drugs that target key indications in cancer with high unmet medical needs. 4SC's pipeline is protected by a comprehensive portfolio of patents and currently comprises one drug candidate in clinical development: Kinselby - resminostat.

4SC aims to generate future growth and enhance its enterprise value by entering into partnerships with pharmaceutical and biotech companies and/or the eventual marketing and sales of approved drugs in select territories by 4SC itself.

4SC is headquartered in Planegg-Martinsried near Munich, Germany. The Company had 15 employees as of 31 December 2023 and is listed on the Prime Standard of the Frankfurt Stock Exchange (FSE Prime Standard: VSC; ISIN: DE000A3E5C40).

About Kinselby (resminostat)  

Resminostat is an orally administered class I, IIb and IV histone deacetylase (HDAC) inhibitor that potentially offers an approach to treating different kinds of cancer. Resminostat demonstrated that it is well tolerated and can inhibit tumor growth and proliferation, cause tumor regression, and strengthen the body's immune response to cancer. Resminostat is currently being investigated in a pivotal study in cutaneous T-cell lymphoma (CTCL) as maintenance treatment by 4SC in Europe and by Yakult Honsha in Japan.  

About cutaneous T-cell lymphoma (CTCL)  

CTCL is a rare disease with approximately 5,000 patients being newly diagnosed in Europe each year. The disease arises from malignant transformation of T-cells, a specialized subgroup of immune cells, and primarily affects the skin, but may ultimately involve lymph nodes, blood and visceral organs.  

Currently, CTCL is incurable and treatment options for advanced-stage CTCL are limited. Although patients respond to the available treatment options, the duration of response is often short-lived and declines as the severity of the disease increases. The key therapeutic challenge in advanced-stage CTCL is therefore to make remissions more durable by halting disease progression and improving patient's quality of life.  

About the RESMAIN study – resminostat for maintenance treatment of CTCL  

The pivotal RESMAIN study was conducted at more than 50 clinical centers in 11 European countries and Japan. It included 201 patients who suffer from advanced-stage cutaneous T-cell lymphoma (CTCL) that have achieved disease control with systemic therapy. The patients were randomized 1:1 to receive either resminostat or placebo. Patients who experienced disease progression – while being on placebo – were offered resminostat in an open label treatment arm.  

The primary goal of the study was to determine whether maintenance treatment with resminostat prolongs progression-free survival and other secondary objectives. Data demonstrating that resminostat met the primary endpoint of the RESMAIN study was published in May 2023.

About the concept of maintenance therapy  

The pivotal RESMAIN study is focused on patients with advanced-stage, incurable, cutaneous T-cell lymphoma (CTCL). Such patients suffer from painful and itchy skin lesions resulting in disfigurement and a severely impaired quality of life. Furthermore, lymph nodes, blood or visceral organs can be involved. The current therapeutic options rarely provide long-lasting responses or stabilization of disease for meaningful periods, with most patients progressing within a few months.  

Resminostat is being evaluated as maintenance treatment - a unique innovative treatment approach in CTCL (Stadler et al., 2021) - intended to prolong the period patients are stable and not progressing.

Forward-looking information

Information set forth in this press release contains forward-looking statements, which involve risks and uncertainties. The forward-looking statements contained herein represent the judgement of 4SC as of the date of this press release. Such forward-looking statements are neither promises nor guarantees, but are subject to a variety of risks and uncertainties, many of which are beyond 4SC's control, and which could cause actual results to differ materially from those contemplated in these forward-looking statements. 4SC expressly disclaims any obligation or undertaking to release any updates or revisions to any such statements to reflect any change in its expectations or any change in events, conditions or circumstances on which any such statement is based.

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Emitter:	4SC AG Fraunhoferstr. 22 82152 Planegg-Martinsried Germany
Contact Person:	Jason Loveridge
Phone:	+49 89 700763-0
E-Mail:	ir-pr@4sc.com
Website:	www.4sc.de
ISIN(s):	DE000A3E5C40 (Share)
Stock Exchange(s):	Regulated Market in Frankfurt; Free Market in Berlin, Dusseldorf, Hamburg, Munich, Stuttgart, Tradegate