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

A Placebo-controlled, Within-group Randomised, and Double-blind Trial Investigating Safety, Tolerability, and Pharmacokinetics of FE 999301 After Ascending Single and Multiple Doses in Healthy Subjects

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 (600 mg every 2nd week for 12 weeks) 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 (up to 2400 mg) to support the clinical development program. Our hypothesis is that treatment with higher doses of Olamkicept will result in greater clinical improvement for patients with inflammatory bowel diseases.

Inclusion Criteria:

• Men ≥18 and ≤45 years of age at screening
• In good health, determined by no clinically significant findings from medical history, physical examination, 12-lead electrocardiogram (ECG), vital signs measurements, and clinical laboratory evaluations, as assessed by the investigator (or designee) at screening and on Day -1

Exclusion Criteria:

• History of clinically significant medical conditions including, but not limited to, diseases of the renal, hepatic, respiratory, gastrointestinal, cardiovascular, neurological, musculoskeletal, psychiatric, immunological, haematological, oncological, endocrine, and metabolic systems and allergic diseases (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at the time of dosing).