Investigating the Safety, Tolerability, Immunogenicity and Pharmacokinetics of Olamkicept in Healthy Japanese Persons

Interleukin (IL)-6 is a cytokine produced in response to infection and tissue damage. IL-6 is believed to act as a key mediator in chronic inflammation and autoimmune diseases such as inflammatory bowel diseases. IL-6 is known to be involved in at least two distinct signalling pathways, classical and trans-signalling. The hypothesis is that classical signalling by IL-6 infers some beneficial effects (e.g. on gut barrier function), while excessive IL-6 trans-signalling may have detrimental effects. Olamkicept (FE 999301) has been shown in vitro to be a selective IL-6 trans-signalling inhibitor and administered at lower doses, it has proven to induce clinical improvement for patients with ulcerative colitis. The aim of this trial is to investigate safety, tolerability, immunogenicity and pharmacokinetics of Olamkicept at higher doses, to support the clinical development program. The hypothesis for this study is that treatment with higher doses of Olamkicept will result in greater clinical improvement for participants with inflammatory bowel diseases.