Dose-finding Study of SAR443122 in Adult Participants With Ulcerative Colitis

Study Purpose

This is a randomized, double-blind, placebo controlled, dose-ranging Phase 2 study. The primary objective is to evaluate the efficacy and safety of SAR443122 compared to placebo in participants with moderate to severe UC. Dose selection for further clinical development will be based on the multiple efficacy, safety and PK parameters. The study consists of 4 parallel arms (3 dose groups of SAR443122 vs.#46;placebo) to assess the efficacy and safety of SAR443122 in participants with moderate to severe UC. All participants will receive a total of 52 weeks (a 12-week induction treatment phase and a 40-week maintenance phase) of study treatment, except if treatment should be discontinued per investigator's assessment. At the end of the first 12 weeks of induction treatment, all participants in clinical response or remission will be offered study treatment up to 40 weeks and will continue with the same blinded treatment that was assigned. Participants who do not achieve clinical response or remission at the end of the initial 12 weeks induction treatment will roll over in an open-label treatment arm and will be treated with SAR443122 at the highest tested dose. In addition, participants from the maintenance treatment that lose clinical efficacy at any time up to V10/Week 40 (Week 28 of maintenance) will be offered to roll over in the open-label treatment arm with SAR443122 at the highest dose.

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 18 Years - 75 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Participants who have clinical evidence of active Ulcerative Colitis [UC] for ≥3 months before screening as confirmed by endoscopy during the screening period and within no more than 10 days prior to randomization.
  • - Participants must have a minimum disease extent of 15 centimeters from the anal verge.
  • - Participants are inadequate or non-responders, have shown loss of response, or are intolerant to at least 1 of following approved treatments: amino-salicylate, corticosteroids, immunosuppressants or biologics other than natalizumab (Tysabri®).
  • - Participants on corticosteroids must be on a stable dose ≥2 weeks prior to screening and during screening period.
  • - Participants on methotrexate, azathioprine or 6- mercaptopurine must be on treatment for at least 8 weeks prior to screening; and on a stable dose ≥4 weeks prior to screening and during screening period.
  • - Participants on oral 5-aminosalicylates, mesalamine or sulfasalazine must be on a stable dose for ≥4 weeks prior to screening and during screening period.
  • - Participants on biologics must have been administered 1) at least 5 half-lives prior to randomization, or 2) participant must have an undetectable level of the biologic in their blood prior to randomization.
  • - Contraceptive use by men and women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
Women participants should not be pregnant or breastfeeding.

Exclusion Criteria:

  • - Participants with Crohn's Disease (CD).
  • - Participants with diagnosis of indeterminate colitis.
  • - Participants with stool sample positive for culture for aerobic pathogens.
  • - Participants with prior colectomy or anticipated colectomy during their participation in the study.
  • - Participants with presence of ileal pouch or ostomy.
  • - Participants with fulminant disease or toxic megacolon.
  • - Participants with colonic dysplasia except for adenoma.
  • - Participants with intestinal failure or short bowel syndrome requiring Total Parenteral Nutrition (TPN).
  • - Participants with history of recurrent or recent serious infection that has not resolved within 4 weeks prior to randomization.
  • - Participants presenting with malignancies except history of basal cell carcinoma or in-situ cervical carcinoma.
  • - Participants with a history or presence of another significant illness that according to the investigator's judgment would adversely affect the subject's ability to participate in this study.
  • - Participants presenting with fever (≥38°C) or persistent chronic or active recurring infection requiring treatment with antibiotics, antivirals, or antifungals within 4 weeks prior to the Screening Visit, or history of frequent recurrent infections unacceptable per investigator's judgment.
  • - Participants who were administered any live (attenuated) vaccine within 3 months prior to the randomization Visit.
  • - Participants with a history of recurrent herpes zoster.
  • - Participants with uncontrolled diabetes, defined as HbA1c ≥9.0% at the Screening Visit.
  • - Participants with active tuberculosis (TB) or non-tuberculous mycobacterial infection, or a history of incompletely treated active or latent TB per local guidelines will be excluded from the study unless it is documented by a specialist that the participant has been adequately treated and can now start treatment with the RIPK1 kinase inhibitor.
  • - Participants presenting with opportunistic infections within six months prior to screening or while receiving anti-TNF treatment in the last 6 months.
  • - Participants undergoing hemodialysis or peritoneal dialysis.
  • - Participants with a known history of Human Immunodeficiency Virus (HIV) infection or positive HIV serology at screening.
  • - Participants with Positive Hepatitis B surface antigen (HBsAg) or positive Hepatitis B core antibody (HBcAb); and/or positive Hepatitis C antibody (HCV) at the Screening Visit.
Participants that were treated for HCV and clear the virus documented by HCV RNA by PCR below the limit of quantification can be eligible.
  • - Positive COVID-19 screening test suspected of COVID-19 infection or known exposure to COVID-19 during the screening period.
  • - History of COVID-19 infection within 4 weeks prior to Screening; history of mechanical ventilation or extracorporeal membrane oxygenation (ECMO) due to COVID-19 infection within 3 months prior to Screening or with residual significant complications from COVID-19 making it unsafe for the participant to enter this study.
  • - Participants presenting alcohol or drug dependency within the 2 years prior to the Screening Visit.
  • - Participants with unexplained, uncontrolled, or untreated thyroid disease or unexplained abnormal serum prolactin levels.
  • - Participants under cyclosporine, mycophenolate mofetil, sirolimus (rapamycin), thalidomide or tacrolimus treatment within 4 weeks prior to screening.
  • - Participants with previous exposure to natalizumab (Tysabri®), JAK (Janus kinase) inhibitors or S1P receptor modulator.
  • - Participants with previous exposure to RIPK1 inhibitor.
  • - Participants under antidiarrheals within 2 weeks prior to screening and during screening period.
  • - Participants under prednisone >25 mg/day (or equivalent).
  • - Participants under budesonide >9 mg/day.
  • - Participants who received intravenous corticosteroids within 2 weeks prior to screening or during screening.
  • - Participants who were rectally administered topical 5-aminosalicylate or corticosteroids within 4 weeks prior to screening.
  • - Participants who received therapeutic enema or suppository, other than required for colonoscopy or flexible sigmoidoscopy within 4 weeks prior to screening or during screening.
  • - Participants who received antibiotics for UC or gastrointestinal infection within 4 weeks prior to screening.
  • - Participants who have taken other investigational medications within 2 months or 5 half-lives, (whichever is longer) prior to screening.
  • - Presence of significant laboratory findings at the Screening Visit.
The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

Trial Details

Trial ID:

This trial id was obtained from, 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 2
Lead Sponsor

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

Principal Investigator

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

Principal Investigator Affiliation N/A
Agency Class

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

Overall Status Recruiting
Countries Argentina, Chile, United Kingdom, United States

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

Colitis Ulcerative
Additional Details

Total study duration per participant will be up to 58 weeks, including a screening period of up to 4 weeks, a treatment period up to 52 weeks and a post-treatment follow-up period of 2 weeks.

Arms & Interventions


Experimental: SAR443122 level 1

Dose level 1

Experimental: SAR443122 level 2

Dose level 2

Experimental: SAR443122 level 3

Dose level 3

Placebo Comparator: Placebo

Matching Placebo


Drug: - SAR443122

oral capsule

Drug: - Placebo

oral capsule

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.

Los Alamitos, California




United Medical Doctors-Site Number:8400005

Los Alamitos, California, 90720

Las Vegas, Nevada


Not yet recruiting


Las Vegas Medical Research-Site Number:8400004

Las Vegas, Nevada, 89113

Salisbury, North Carolina




Onsite Clinical Solutions-Site Number:8400003

Salisbury, North Carolina, 28144

International Sites

Investigational Site Number :0320001, San Miguel de Tucuman, Tucumán, Argentina




Investigational Site Number :0320001

San Miguel de Tucuman, Tucumán, T4000AXL

Investigational Site Number :1520001, Santiago, Reg Metropolitana De Santiago, Chile




Investigational Site Number :1520001

Santiago, Reg Metropolitana De Santiago, 7500010

Investigational Site Number :8260003, Warrington, United Kingdom




Investigational Site Number :8260003

Warrington, , WA5 1QG