ABTECT - Maintenance
Purpose
This is a multicenter, randomized study to evaluate the long-term efficacy and safety of ABX464 50mg and 25mg administered once daily (QD) as maintenance therapy in subjects with moderately to severely active ulcerative colitis who have inadequate response, no response, a loss of response, or an intolerance to either conventional therapies [corticosteroids, immunosuppressant (i.e. azathioprine, 6-mercaptopurine, methotrexate)] and/or advanced therapies [biologics (TNF inhibitors, anti-integrins, anti-IL-23), and/or S1P receptor modulators, and/or JAK inhibitors]. This study is the maintenance phase of both previous induction studies ABX464-105 and ABX464-106. All eligible subjects who have completed either one of the induction studies above mentioned, will be given the opportunity to take part in the present ABX464-107 maintenance study and will be randomized to either a double blind, placebo-controlled part (Part #1) or allocated to ABX464 50mg or 25mg open label treatment arms (Part #2) depending on their clinical response at the end of induction. This study consists of a 44-week treatment phase and a 28-days follow-up period consisting in the End of Study (EOS) visit.
Condition
- Ulcerative Colitis
Eligibility
- Eligible Ages
- Over 16 Years
- Eligible Genders
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- Subjects must have completed the induction treatment study (ABX464-105 or ABX464-106), and patients' clinical response status must be available. - Subjects with a valid endoscopy performed at the end of the induction study and results from central reader available at Day 1. - Subjects must understand, sign and date the written voluntary informed consent form at the visit prior to any protocol-specific procedures. For under-aged subjects, national requirements regarding consent should also be met. - Women of childbearing potential (WOCBP) subjects and male subjects with WOCBP partner must agree to use highly effective contraception methods as stated in Section 4.4. (Contraception) of this protocol. - Subjects must be able and willing to comply with study visits and procedures as per protocol. - Subjects should be affiliated to a health insurance policy whenever required by a participating country or state
Exclusion Criteria
- Subjects who permanently discontinued the study treatment during the induction study (either ABX464-105 or ABX464-106). - Subjects who have developed any major illness/condition or evidence of an unstable clinical condition (except UC) during the induction study that, in the investigator's judgment, will substantially increase the risk to the participant if he or she participates in the study. - Subjects who plan to participate in other investigational studies during the maintenance study. - Male or female planning a pregnancy within the coming 12 months
Study Design
- Phase
- Phase 3
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel Assignment
- Intervention Model Description
- Among both induction studies, subjects assessed as responders will be randomized as follows in the maintenance study according to their induction treatment: ABX464 Dose 50 mg QD ABX464 Dose 25 mg QD (2/3 subjects from the 25mg induction dose group and 1/3 subjects from the 50mg induction group) Placebo (1/3 subjects from the 25mg induction dose group and 2/3 subjects from the 50mg induction group). All subjects with clinical response who were dosed with placebo in the induction studies will be randomized into the placebo group. Non-responder subjects are expected to opt in the maintenance study part #2 after completion of the induction studies. They will be randomly allocated into the two open-label ABX464 dose levels. ABX464 Dose 50 mg QD ABX464 Dose 25 mg QD
- Primary Purpose
- Treatment
- Masking
- Triple (Participant, Care Provider, Investigator)
- Masking Description
- All eligible subjects will be randomized to either a double blind, placebo-controlled part (Part #1) or allocated to ABX464 50mg or 25mg open label treatment arms (Part #2) depending on their clinical response at the end of induction.
Arm Groups
Arm | Description | Assigned Intervention |
---|---|---|
Experimental ABX464 50mg - Responder subjects at the end of induction |
Subjects will be orally dosed during 44 weeks |
|
Experimental ABX464 25mg - Responder subjects at the end of induction |
Subjects will be orally dosed during 44 weeks |
|
Placebo Comparator Placebo - Responder subjects at the end of induction |
Subjects will be orally dosed during 44 weeks |
|
Experimental ABX464 50mg - Non responder subjects at the end of induction |
Subjects will be orally dosed during 44 weeks |
|
Experimental ABX464 25mg - Non responder subjects at the end of induction |
Subjects will be orally dosed during 44 weeks |
|
Recruiting Locations
Boston, Massachusetts 02118
Alan Moss, MD
More Details
- Status
- Recruiting
- Sponsor
- Abivax S.A.