Evaluating CSL889 for treating vaso-occlusive crises in sickle cell disease
Official title: A Phase 2, Multicenter, Randomized, Multiple-Dose, Double-Blind, Placebo-Controlled Study to Evaluate the Safety, Efficacy, and Pharmacokinetics of CSL889 in Adults and Adolescents With Sickle Cell Disease During Vaso-Occlusive Crisis
Run by CSL Behring · NCT06699849 · Data updated 2026-11-12
This study is testing a new treatment called CSL889 to see if it can help adults and teens with sickle cell disease who are having painful vaso-occlusive crises feel better.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 12 Years and up |
| Sex | All |
| Enrollment | 70 (estimated) |
| Sponsor | CSL Behring Industry-sponsored |
| Locations | 30 sites (Oakland, California and 29 other locations) |
| Status | Recruiting |
| Started | July 10, 2025 |
| Main results expected | October 22, 2027 |
| Study ends | October 22, 2027 |
| Registry record updated | October 8, 2026 |
| Trial ID | NCT06699849 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are adults and adolescents aged 12 and older diagnosed with sickle cell disease who are experiencing a new acute vaso-occlusive crisis.
✕Probably not a fit
Patients who have had a history of more than five vaso-occlusive crises requiring hospitalization in the past six months or those with acute kidney injury may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial is designed to assess the safety, efficacy, and pharmacokinetics of CSL889, a human hemopexin, administered intravenously to adults and adolescents with sickle cell disease experiencing vaso-occlusive crises. The study consists of two parts: a phase 2 component focusing on initial safety and efficacy, followed by a phase 3 component to further evaluate these aspects in a larger population. Participants will be monitored for the resolution time of vaso-occlusive crises and the overall tolerability of the treatment. The trial aims to provide valuable insights into a potential new therapeutic option for managing this painful condition.
Why it matters
Potential benefit: If successful, this treatment could significantly reduce the duration and severity of vaso-occlusive crises in patients with sickle cell disease.
How similar studies have gone: While this approach is novel in the context of CSL889, similar studies targeting vaso-occlusive crises in sickle cell disease have shown promise with other interventions.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * At the time of informed consent: * 18 years of age (adults); or * 12 to less than (\<) 18 years of age (adolescents, where approved and when enrollment for adolescents has been opened by the sponsor, with the endorsement of the Independent Data Monitoring Committee \[IDMC\]) * Diagnosed with SCD (any genotype). * Presented at the study site with a new acute VOC necessitating treatment with parenteral opioids. Exclusion Criteria: * VOC pain onset greater than (\>) 72 hours before administration of first parenteral opioid. * Must not have a history of \> 5 VOCs requiring hospital admission in the past 6 months; or signs and / or symptoms of ACS; or new neurological symptoms suggestive of acute stroke or transient ischemic attack; or any stage (acute kidney injury) AKI; or been discharged from inpatient hospital admission for VOC or other vaso-occlusive event within 14 days before the current presentation. * Serum hemoglobin \< 6 g/dL, serum ferritin ≥ 2000 ng/mL, receiving an approved medication for SCD that has not been on a stable, well-tolerated regimen, currently taking methadone or buprenorphine.
Where it's running
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Univ. of California, San Francisco Health Care
Oakland, California, United States Recruiting -
University of California Irvine
Orange, California, United States Recruiting -
Medstar Washington Hospital Center
Washington D.C., District of Columbia, United States Recruiting -
Golisano Children's Hospital
Fort Myers, Florida, United States Recruiting -
The Foundation for Sickle Cell Disease
Hollywood, Florida, United States Recruiting -
Arthur M. Blank Hospital-Children's Healthcare of Atlanta
Atlanta, Georgia, United States Recruiting
Show 24 more locations
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University of Illinois at Chicago
Chicago, Illinois, United States Recruiting -
University of Louisville Hospital
Louisville, Kentucky, United States Recruiting -
University of Maryland
Baltimore, Maryland, United States Recruiting -
Detroit Medical Center
Detroit, Michigan, United States Recruiting -
Henry Ford Health System
Detroit, Michigan, United States Recruiting -
St. Louis Children's Hospital
St Louis, Missouri, United States Recruiting -
Mount Sinai Medical Center
New York, New York, United States Recruiting -
Jacobi Medical Center
The Bronx, New York, United States Recruiting -
East Carolina University
Greenville, North Carolina, United States Recruiting -
University of Cincinnati
Cincinnati, Ohio, United States Recruiting -
The Ohio State University
Columbus, Ohio, United States Recruiting -
University of Pittsburgh
Pittsburgh, Pennsylvania, United States Recruiting -
Hillman Cancer Center
Pittsburgh, Pennsylvania, United States Recruiting -
Baskent University School of Medicine
Adana, Turkey (Türkiye) Recruiting -
Hacettepe Universitesi
Ankara, Turkey (Türkiye) Recruiting -
Medical Park Mersin Hospital
Mezitli-Mersin, Turkey (Türkiye) Recruiting -
Özel Acibadem Adana Hastanesi
Seyhan, Turkey (Türkiye) Recruiting -
Özel Acibadem Adana Hastanesi
Seyhan/Adana, Turkey (Türkiye) Recruiting -
Mersin Universitesi
Yenişehir, Turkey (Türkiye) Recruiting -
Royal Liverpool University Hospital
Liverpool, United Kingdom Recruiting -
University College London Hospitals NHS Trust
London, United Kingdom Recruiting -
Guy's Hospital
London, United Kingdom Recruiting -
Virginia Commonwealth University
Richmond, Virginia, United States Withdrawn -
Istanbul Universitesi
Istanbul, Turkey (Türkiye) Not yet recruiting
Study contacts
- Study coordinator: Trial Registration Coordinator
- Email: clinicaltrials@cslbehring.com
- Phone: +1 610-878-4697
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Testing Anumigilimab (CSL324) safety in adults with sickle cell disease
This study will test whether subcutaneous Anumigilimab is safe for adults with sickle cell disease who had 1–12 painful vaso-occlusive crises in the past year.
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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.