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Long-term Safety and Efficacy of Efavaleukin Alfa in Participants With Moderately to Severely Active Ulcerative Colitis

A Phase 2 Long-Term Extension (LTE) Study to Evaluate The Safety and Efficacy of Efavaleukin Alfa in Subjects With Moderately to Severely Active Ulcerative Colitis

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05672199
Enrollment
25
Registered
2023-01-05
Start date
2023-04-28
Completion date
2024-10-31
Last updated
2025-10-15

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

Conditions

Ulcerative Colitis

Keywords

Ulcerative colitis, UC, Moderately to severely active ulcerative colitis, Efavaleukin alfa, AMG 592

Brief summary

The primary objective of this study is to evaluate the long-term safety and tolerability of efavaleukin alfa in participants with moderate to severe ulcerative colitis (UC).

Interventions

Subcutaneous (SC) injection

DRUGPlacebo

SC injection

Sponsors

Amgen
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

* Participant has provided informed consent prior to initiation of any study specific activities/procedures. * Participant has completed the week 52 endoscopy in the phase 2 dose-finding parent study (20170104) and who in the opinion of the investigator may benefit from continued treatment.

Exclusion criteria

* Permanent discontinuation of investigational product during the 52- week phase 2 dose finding parent study (20170104) for any reason * Female subjects of reproductive potential must agree not to donate eggs during the study and for 6 weeks after receiving the last dose of investigational product. Disease Related: * Adenoma and dysplasia

Design outcomes

Primary

MeasureTime frame
Number of Participants with Treatment-emergent Adverse Events (TEAEs)Day 1 to Week 110

Secondary

MeasureTime frameDescription
Number of Participants with Clinical Response at Week 104Week 104
Number of Participants with Clinical Remission at Week 52Week 52
Number of Participants with Clinical Remission at Week 104Week 104
Number of Participants with Durable Clinical Remission at Week 52Week 52
Number of Participants with Durable Clinical Remission at Week 104Week 104
Number of Participants with Endoscopic Remission at Week 52Week 52
Number of Participants with Endoscopic Remission at Week 104Week 104
Number of Participants with Histologic Remission at Week 52Week 52
Number of Participants with Clinical Response at Week 52Week 52
Number of Participants with Corticosteroid-free RemissionWeek 52Measured in participants receiving corticosteroids at randomization of parent Study 20170104.
Number of Participants with Combined Endoscopic and Histologic Remission at Week 52Week 52
Number of Participants with Combined Endoscopic and Histologic Remission at Week 104Week 104
Number of Participants with Symptomatic Remission at Week 52Week 52
Number of Participants with Symptomatic Remission at Week 104Week 104
Change from Baseline of Study 20170104 in Histological Score (Geboes) at Week 52Baseline of Study 20170104 to Week 52 of Long Term Extension Study (up to approximately 104 weeks)
Change from Baseline of Study 20170104 in Histological Score (Geboes) at Week 104Baseline of Study 20170104 to Week 104 of Long Term Extension Study (up to approximately 156 weeks)
Number of Participants with Histologic Remission at Week 104Week 104

Countries

Argentina, Bulgaria, Denmark, Germany, Hungary, Japan, Mexico, Poland, Romania, South Korea, Switzerland, Turkey (Türkiye), United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026