ABTECT - Maintenance

Study 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.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 16 Years and Over
Gender All
More Inclusion & Exclusion Criteria

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

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Phase 3
Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Abivax S.A.
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

Severine Vermeire, MD, PhDBruce Sands, MD, PhD
Principal Investigator Affiliation UZ Leuven, BelgiumMount Sinai Health System Digestive Disease Institute, New York USA
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Ulcerative Colitis
Arms & Interventions


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


Drug: - ABX464

Administered once daily in the morning with food

Drug: - Placebo

Administered once daily in the morning with food

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Dothan, Alabama




Digestive Health Specialists of the Southeast

Dothan, Alabama, 36305

Site Contact