CLYM116 in healthy adults
Official title: A Phase 1, Randomized, Double-Blind, Placebo-Controlled, Single-Ascending-Dose (SAD) and Multiple-Ascending-Dose (MAD) Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Subcutaneous Injection(s) of CLYM116 in Normal Healthy Volunteers
Run by Climb Bio, Inc. · NCT07248865 · Data updated 2026-11-12
Researchers will test a new antibody called CLYM116 in healthy adults to check safety, how the body processes it, and its immune effects.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 60 Years |
| Sex | All |
| Enrollment | 48 (estimated) |
| Sponsor | Climb Bio, Inc. Industry-sponsored |
| Locations | 1 site (Brisbane) |
| Status | Recruiting |
| Started | December 2, 2025 |
| Main results expected | July 2026 |
| Study ends | September 2026 |
| Registry record updated | February 20, 2026 |
| Trial ID | NCT07248865 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Healthy adults aged 18–60 with BMI 18–32 kg/m² and weight 45–110 kg, with normal clinical exams and labs, who agree to required contraception and study procedures are ideal candidates.
✕Probably not a fit
People with active infections, positive HIV/hepatitis/tuberculosis tests, prior hypogammaglobulinemia, recent investigational drug use, significant medical conditions, pregnancy or breastfeeding, or inability to comply with contraception or visits are unlikely to benefit or be eligible.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
CLYM116 is a humanized monoclonal antibody that selectively binds APRIL, a protein involved in B-cell activity. This is a first-in-human, randomized, double-blind, placebo-controlled, single-center Phase 1 study enrolling up to 48 healthy volunteers across up to five dosing cohorts. The study will collect safety, tolerability, pharmacokinetic, pharmacodynamic, and immunogenicity data following administration of CLYM116 or placebo. Participants will undergo screening, planned dosing and detailed clinical and laboratory monitoring with scheduled follow-up visits.
Why it matters
Potential benefit: If CLYM116 is safe and shows the expected biological activity, it could support development of new treatments that target APRIL-related immune disorders, including some autoimmune diseases and B-cell malignancies.
How similar studies have gone: Other agents targeting the APRIL/BAFF pathway have demonstrated biological activity in early trials but clinical benefits have been mixed and some programs reported safety concerns.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Healthy adult males and females aged 18-60 years, inclusive * Body mass index (BMI) between 18 and 32 kg/m² and weight between 45 and 110 kg * Clinically normal medical history, physical exam, ECG, and laboratory results (or abnormalities deemed not clinically significant) * Willing and able to comply with study procedures and provide informed consent * Women of childbearing potential must use highly effective contraception and have negative pregnancy tests * Men must use contraception and refrain from sperm donation for 4 months post-dose * Completion of COVID-19 vaccination according to local guidelines, as well as influenza vaccination (within 12 months) Exclusion Criteria: * Prior treatment with investigational drugs within 30 days or 5 half-lives * Previous or current hypogammaglobulinemia * Current presence of allergic reactions considered clinically significant * Positive tests for HIV, hepatitis B/C, syphilis, or tuberculosis * Tobacco use (\>2 cigarettes/day), alcohol abuse, or drug abuse * Recent live vaccination (within 21 days) or any non-live vaccine (within 14 days)
Where it's running
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Nucleus Network Brisbane
Brisbane, Australia Recruiting
Study contacts
- Study coordinator: Climb Bio Study Director
- Email: clinicaltrials@climbbio.com
- Phone: +1 866 857 2596
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.