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4SC AG: Resminostat: 4SC Filed Letter of Intent to the European Medicines Agency (EMA)

Planegg-Martinsried (pta006/31.05.2023/07:30 UTC+2)

Planegg-Martinsried, Germany, 31 May 2023 – 4SC AG (4SC, FSE Prime Standard: VSC) has now filed with EMA its letter of intent to file for Marketing Authorization for resminostat in cutaneous T cell lymphoma (CTCL) and request the appointment of rapporteurs. Given the clear benefit provided by resminostat with respect to the lengthening of progression free survival in CTCL patients 4SC is moving forward with its Marketing Authorisation Application (MAA) process for resminostat and to initiate pre-submission interactions with EMA. 4SC remains on track to submit the MAA in Q1, 2024.

RESMAIN is a pivotal study, conducted as a multi-center, double blind, randomized, placebo-controlled study, evaluating resminostat for maintenance treatment of patients with advanced-stage cutaneous T-cell lymphoma (CTCL) who have achieved disease control with prior systemic therapy.

Jason Loveridge, CEO of 4SC commented: "Our assessment of the initial data from RESMAIN, and in particular the highly significant outcome for the primary endpoint, justifies us moving rapidly forward with the first steps towards the submission of our MAA for resminostat. We continue to actively analyse the data from RESMAIN and we expect a more detailed dataset will be published at a scientific meeting probably in Q3, 2023".

- Press release ends -

Further information

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: 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 16 employees as of 31 March 2023 and is listed on the Prime Standard of the Frankfurt Stock Exchange (FSE Prime Standard: VSC; ISIN: DE000A3E5C40).

About 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, primarily affects the skin, but may ultimately involve lymph nodes, blood and visceral organs.  

Currently, CTCL is not curable 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 is being 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 experience disease progression – while being on placebo – will be offered resminostat in an open label treatment arm. The primary goal of the study is to determine whether maintenance treatment with resminostat prolongs progression-free survival. The key secondary objective is to prolong the time to symptom worsening (pruritus).

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 several 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. Furthermore, recent preclinical data suggests that resminostat has the potential to alleviate the itching in CTCL patients, thereby additionally improving their quality of life.  

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.


Jason Loveridge, PhD


+49 89 700763-0


Emitter: 4SC AG
Fraunhoferstr. 22
82152 Planegg-Martinsried
Contact Person: Jason Loveridge
Phone: +49 89 700763-0
ISIN(s): DE000A3E5C40 (Share)
Stock Exchange(s): Regulated Market in Frankfurt; Free Market in Berlin, Dusseldorf, Hamburg, Munich, Stuttgart, Tradegate