CompletedPhase 1

A Study to Find Out How Litifilimab is Processed in the Body in Healthy Participants When Given Under the Skin in 3 Different Ways

United States404 participantsStarted 2025-01-02

Plain-language summary

In this study, researchers will learn how the body processes litifilimab when it is given under the skin in 3 different ways. Currently, ongoing studies utilize pre-filled syringes (PFS) that can deliver litifilimab subcutaneously (SC), also known as under the skin. In this study, researchers want to learn more about new ways of delivering litifilimab SC using either an autoinjector (AI) or an on-body injector (OBI): Both devices are designed to deliver litifilimab in an automatic way, especially helping patients who may not be able to use their hands very well, or who may be afraid of needles. While the AI is handheld, the OBI device works by being placed on the skin and can help deliver the highest amount of litifilimab through a single injection. The main objective of this study is to learn how the body processes litifilimab after using the AI device or the OBI device, as compared to using the PFS method. The main questions researchers want to answer are: * What is the highest amount of litifilimab found in the blood after dosing? How much total litifilimab is found in the blood throughout the study? Researchers will also learn more about: Any medical problems the participants have during the study * Any injection site pain or reactions the participants may have. Any skin reactions to the OBI device * Any changes in the participants' overall health after receiving litifilimab. This study will be done as follows: * Participants will be screened to check if they can join the study. The screening period will be up to 4 weeks, after which selected participants will check into their study research center. * Participants will be randomly assigned to be in Part 1 or Part 2 of the study: * Part 1: Participants will receive SC injection(s) of litifilimab through either the AI device or through PFS. * Part 2: Participants will receive SC injection(s) of litifilimab through the OBI device or through PFS. * Participants will remain at their study research center for the first 8 days. After that, there will be a follow-up period for 17 weeks during which participants return to the center a total of 6 times. Each participant will be in the study for about 22 weeks.

Who can participate

Age range

18 Years – 55 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Key Inclusion Criteria * Must have a body mass index between 18.5 and 30 kilograms per square meter (kg/m\^2), and a body weight ≥ 50 kg to ≤ 100 kg. * Must be in good health as determined by the investigator, based on medical history physical examination, electrocardiogram (ECG), and other screening evaluations. Key Exclusion Criteria * History of any clinically significant cardiac, endocrine, gastrointestinal, hematologic, hepatic, immunologic, metabolic, urologic, pulmonary, neurologic, dermatologic, psychiatric, or renal disease, or other major disease, as determined by the investigator. * A positive diagnostic tuberculosis test result within 4 weeks prior to Enrollment (Day 1), defined as a positive QuantiFERON® test result or 2 successive indeterminate QuantiFERON test results. * History or positive test result for human immunodeficiency virus (HIV). * History of severe herpes infection such as herpetic encephalitis, ophthalmic herpes, or disseminated herpes. NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Part 1 and 2: Maximum Observed Concentration (Cmax) of Litifilimab

Timeframe: Pre-dose and at multiple timepoints up to Week 22

Part 1 and 2: Area Under the Concentration-Time Curve From Time 0 to Infinity (AUC0-inf)

Timeframe: Pre-dose and at multiple timepoints up to Week 22

Trial details

NCT IDNCT06741657

SponsorBiogen

Sponsor typeINDUSTRY

Study typeINTERVENTIONAL

Primary completion2026-03-10

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