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

Sponsor

Amgen (Industry)

Overall Status

Not yet recruiting

CT.gov ID

NCT05672199

Collaborator

(none)

200

Enrollment

Arms

40.8

Anticipated Duration (Months)

Study Details

Study Description

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).

Condition or Disease	Intervention/Treatment	Phase
Ulcerative Colitis	Drug: Efavaleukin alfa Drug: Placebo	Phase 2

Study Design

Study Type:

Interventional

Anticipated Enrollment :

200 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

Double (Participant, Investigator)

Primary Purpose:

Treatment

Official Title:

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

Anticipated Study Start Date :

Apr 6, 2023

Anticipated Primary Completion Date :

Aug 29, 2026

Anticipated Study Completion Date :

Aug 29, 2026

Arms and Interventions

Arm	Intervention/Treatment
Placebo Comparator: Placebo Participants who were receiving the placebo during the dose-finding study (study 20170104) that decided to continue onto this long-term extension study will continue to receive the placebo.	Drug: Placebo SC injection
Experimental: Efavaleukin Alfa Dose 1 (Low Dose) Participants who were receiving efavaleukin alfa dose 1 during the dose-finding study (study 20170104) that decided to continue onto this long-term extension study will continue to receive efavaleukin alfa dose 1.	Drug: Efavaleukin alfa Subcutaneous (SC) injection Other Names: AMG 592
Experimental: Efavaleukin Alfa Dose 2 (Moderate Dose) Participants who were receiving efavaleukin alfa dose 2 during the dose-finding study (study 20170104) that decided to continue onto this long-term extension study will continue to receive efavaleukin alfa dose 2.	Drug: Efavaleukin alfa Subcutaneous (SC) injection Other Names: AMG 592
Experimental: Efavaleukin Alfa Dose 3 (High Dose) Participants who were receiving efavaleukin alfa dose 3 during the dose-finding study (study 20170104) that decided to continue onto this long-term extension study will continue to receive efavaleukin alfa dose 3.	Drug: Efavaleukin alfa Subcutaneous (SC) injection Other Names: AMG 592

Outcome Measures

Primary Outcome Measures

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

Secondary Outcome Measures

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

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years to 80 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

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 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 study (20170104) for any reason

Disease Related:

Adenoma and dysplasia exclusion criteria:
Any current sporadic adenoma without dysplasia (adenomatous polyps occurring proximal to known areas of colitis) that has not been removed.
Dysplasia occurring in flat mucosa, sporadic adenomas containing dysplasia, and dysplasia-associated lesions or masses will be managed as follows:
Any history or current evidence of high-grade dysplasia.
Any history or current evidence of dysplasia occurring in flat mucosa.
This includes histopathology reporting indefinite for dysplasia, low-grade dysplasia, and high-grade dysplasia.
Any history or current evidence of a nonadenoma like dysplasia associated lesions or masses, with or without evidence of dysplasia.
Any current sporadic adenoma containing dysplasia or any current adenoma-like dysplasia-associated lesions or masses that has not been removed.

Other Medical Conditions:

Any malignancy diagnosed during Study 20170104, including evidence of cutaneous basal or squamous cell carcinoma or melanoma
Active infection (including chronic, acute, recurrent, opportunistic infections) at the time of eligibility evaluation requiring intravenous (IV) anti-infectives or hospitalization (infections requiring oral and/or topical anti-infective[s] for > 7 days may be allowed in consultation with the Amgen physician).
Required systemic corticosteroid use for any indication other than ulcerative colitis. The only exception is corticosteroids used for the treatment of adrenal insufficiency are allowed.
Plan to receive a live (attenuated) vaccine during the treatment period and up to 6 weeks after the last dose of investigational product in the long term extension study.

Prior/Concurrent Clinical Study Experience:

Currently receiving treatment in another investigational device or drug study. Other investigational procedures while participating in this study are excluded.

Other Exclusions:

Female participants who are pregnant or breastfeeding or planning to become pregnant or breastfeed during study and for an additional 6 weeks after the last dose of investigational product.
Female participants of childbearing potential unwilling to use protocol specified method of contraception see Appendix 5 (Section 11.5) during treatment and for an additional 6 weeks after the last dose of investigational product.
Participant has known sensitivity to any of the products to be administered during dosing with the exception of participants who exhibited sensitivity in Study 20170104 but did not result in treatment discontinuation.
Participant likely to not be available to complete all protocol-required study visits or procedures, and/or to comply with all required study procedures (e.g., Clinical Outcome Assessments) to the best of the participant and investigator's knowledge.
Participant has a history or evidence of any other clinically significant disorder (including laboratory abnormalities), condition, or disease that, in the opinion of the investigator or Amgen physician, if consulted would pose a risk to participant safety, or interfere with the study evaluation, procedures, or completion.