In this clinical trial, patients with diabetic foot ulcers resistant to conventional therapies received the newly developed cell therapy. DFU wounds cause significant physical and mental suffering, including pain and mobility limitations.

Conventional wound treatments mostly result in only temporary symptomatic relief in DFU patients and usually do not lead to wound healing. In contrast, the current study demonstrated that topically grafted, highly purified ABCB5+ allogeneic dermal mesenchymal stem cells (MSCs), shown capable of modulating key immune parameters involved in wound healing, successfully promoted wound size reduction. In approximately 80 percent of DFU patients, the novel therapy reduced ulcer size by an average of 72 percent. Even complete wound closures were observed as a result of treatment. 

The starting material for generating ABCB5+ MSCs in high numbers is allogeneic human donor skin. These stem cells are manufactured by TICEBA GmbH, Heidelberg, in a patented process. Using this method, highly purified stem cells can be manufactured in large numbers, reliably isolated, and finally produced as a highly purified, homogeneous drug substance [highly functional manufactured stem cells (H.F.M stem cells)]. These ABCB5+ MSCs are classified by the European Medicines Agency (EMA) as an Advanced Therapy Medicinal Product (ATMP), which is manufactured under good manufacturing practice (GMP) in accordance with §13 paragraph 1 of the German Medicinal Products Act (AMG).

The multicenter trial was conducted in Germany. Following demonstration of efficacy and safety of the ATMP, the data obtained will be used for further clinical development of the drug. The next phase clinical trial is currently in preparation.