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A Phase 2 / Phase 3, Multicenter, Randomized, Multiple-Dose, Double-Blind, Placebo-Controlled Adaptive Study to Evaluate the Safety, Efficacy, and Pharmacokinetics of CSL889 in Adults and Adolescents with Sickle Cell Disease during Vaso-Occlusive Crisis

Status
Completed
Phases
Phase 2Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-513440-29-00
Acronym
CSL889_2001
Enrollment
76
Registered
2025-04-08
Start date
2025-06-25
Completion date
2025-12-02
Last updated
2025-11-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Sickle cell disease vaso-occlusive crisis

Brief summary

Time to resolution of VOC (time to discontinuation of parenteral opioids), Number of participants with treatment-emergent adverse events (TEAEs), Percentage of participants with TEAEs, Number of participants with detectable treatment emergent (TE) anti-CSL889 antibodies, Percentage of participants with detectable TE anti-CSL889 antibodies

Detailed description

Hospital admission rate, Length of hospital stay (If hospitalized), Percentage of participants experiencing acute chest syndrome (ACS), acute kidney injury (AKI), or stroke, Length of acute care stay, Total Length of acute care and hospital stay, Re-presentation rate to an acute care facility for VOC or ACS after discharge, Hospital admission rate for VOC or ACS after discharge, Opioid consumption, Percentage of participants with >=30% pain reduction by NRS score, Maximum observed concentration (Cmax) after Doses 1 and 3 of CSL889, Area under the concentration (AUCtau) after Doses 1 and 3 of CSL889, Time of maximum concentration (Tmax) after Doses 1 and 3 of CSL889, Trough concentration (Ctrough) after each dose of CSL889, Accumulation ratio (AR) for AUCtau of CSL889 (the ratio between the AUCtau of Doses 3 and 1), AR for Cmax of CSL889 (the ratio between the Cmax of Doses 3 and 1), AR for Ctrough of CSL889 (the ratio between the Ctrough of the last dose and Dose 1), Ctrough after each dose in sparse PK subset of CSL889

Interventions

DRUGHemopexin
DRUGHuman
DRUGPlacebo_ solution for infusion_ not active substance

Sponsors

CSL Behring LLC
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
0 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Time to resolution of VOC (time to discontinuation of parenteral opioids), Number of participants with treatment-emergent adverse events (TEAEs), Percentage of participants with TEAEs, Number of participants with detectable treatment emergent (TE) anti-CSL889 antibodies, Percentage of participants with detectable TE anti-CSL889 antibodies

Secondary

MeasureTime frame
Hospital admission rate, Length of hospital stay (If hospitalized), Percentage of participants experiencing acute chest syndrome (ACS), acute kidney injury (AKI), or stroke, Length of acute care stay, Total Length of acute care and hospital stay, Re-presentation rate to an acute care facility for VOC or ACS after discharge, Hospital admission rate for VOC or ACS after discharge, Opioid consumption, Percentage of participants with >=30% pain reduction by NRS score, Maximum observed concentration (Cmax) after Doses 1 and 3 of CSL889, Area under the concentration (AUCtau) after Doses 1 and 3 of CSL889, Time of maximum concentration (Tmax) after Doses 1 and 3 of CSL889, Trough concentration (Ctrough) after each dose of CSL889, Accumulation ratio (AR) for AUCtau of CSL889 (the ratio between the AUCtau of Doses 3 and 1), AR for Cmax of CSL889 (the ratio between the Cmax of Doses 3 and 1), AR for Ctrough of CSL889 (the ratio between the Ctrough of the last dose and Dose 1), Ctrough after eac

Countries

Belgium, France, Germany, Greece, Italy, Netherlands, Spain

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026