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NCT Number: NCT07697456

Study of Advanced Therapies for the Treatment of Adult Participants With Moderately to Severely Active Crohn's Disease or Ulcerative Colitis

Crohn's disease (CD) and Ulcerative colitis (UC) are 2 types of inflammatory bowel diseases which cause long-lasting, severe inflammation (redness, swelling) in the digestive tract. CD can affect any part of the digestive tract causing many different symptoms including belly pain, diarrhea, tiredness, and weight loss. UC affects the lining of the rectum and colon (large intestine) and can cause bleeding, belly pain, and diarrhea. This platform basket study will evaluate how safe and effective advanced therapies are in adults with moderately to severely active Crohn's Disease (CD) or Ulcerative Colitis (UC).

This study currently includes 2 substudies evaluating different treatments in participants with CD or UC. Substudy 1 will evaluate the combination of risankizumab and trosunilimab (ABBV-466) and Substudy 2 will evaluate the combination of risankizumab and ABBV-701 (ABBV-7066). When adult participants with moderately to severely active CD or UC join the study, they will undergo a 2-step randomization within CD and UC substudies, respectively. The first unblinded randomization will assign participants into a substudy, and the second blinded randomization will assign participants to a treatment arm within the assigned substudy. Approximately 100 adult participants will be enrolled per treatment arm across both substudies at approximately 400 sites worldwide.

There may be higher treatment burden for participants in this trial compared to their standard of care treatment without participating in this study. Participants will attend regular visits during the study at a hospital or clinic. The effect of the treatment will be checked by medical assessments, blood tests, stool tests, endoscopies, checking for side effects and completing questionnaires and a daily diary.

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Key information

Conditions

Crohn's Disease Colitis Colitis, Ulcerative Colonic Diseases Crohn Disease Digestive System Diseases Gastroenteritis Gastrointestinal Diseases Inflammatory Bowel Diseases Intestinal Diseases Ulcerative Colitis

Age range

18 year–75 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Macquarie Hospital /ID# 281739, Macquarie University, New South Wales, Australia

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

CD specific:

  • Crohn's Disease Activity Index (CDAI) score of ≥ 220
  • Confirmed diagnosis of CD at least 90 days prior to Baseline
  • Endoscopic evidence of mucosal inflammation as documented by an Simple Endoscopic Score for Crohn's Disease (SES-CD) of ≥ 6 for ileocolonic or colonic disease or SES-CD of ≥ 4 for isolated ileal disease.
  • Demonstrated failure of 1 or more therapy for CD

UC specific:

  • Confirmed diagnosis of UC at least 90 days prior to Baseline
  • Active UC with a modified Mayo Score (mMS) of 5 to 9 points and endoscopic subscore (ESS) of 2 to 3
  • Demonstrated failure of 1 or more therapy for UC

Exclusion criteria

  • Participants with demonstrated intolerance to p19 IL-23 inhibitors (including risankizumab)
  • Participants treated with any investigational drug within 30 days or 5 half-lives of the study treatments (whichever is longer) prior to the first dose of study treatment
  • Participants who received any ATs (biologic or small molecules) prior to first dose of study treatment within the protocol specified time frame
  • Participants with surgical bowel resection within the past 3 months prior to Baseline

CD specific:

  • Participants with >3 prior bowel resections
  • Participants with previous small bowel resection(s) of combined length >100 cm

UC specific:

  • Participants with prior colectomy (total or subtotal)
  • Participants with extent of disease limited to < 10 cm of rectum

Treatment and study plan

Risankizumab

Drug

Intravenous/Subcutaneous/Intramuscular Injection/Infusion

Other names: ABBV-066

Trosunilimab

Drug

Intravenous/Subcutaneous/Intramuscular Injection/Infusion

Other names: ABBV-382

ABBV-701

Drug

Intravenous/Subcutaneous/Intramuscular Injection/Infusion

Primary outcomes

  1. Crohn's Disease Specific: Percentage of Participants Achieving Endoscopic Remission

    Time frame: At Week 28

    Endoscopic remission is defined as Simple Endoscopic Score for Crohn's Disease (SES-CD) <= 4 and no sub score greater than 1 in any individual variable, as scored by a central reviewer.

  2. Ulcerative Colitis Specific: Percentage of Participants who Achieve Endoscopic Remission

    Time frame: At Week 28

    Endoscopic remission is defined as Mayo Endoscopic Subscore (ESS) of 0. Endoscopies were assessed by a blinded central reader and scored according to the following scale: 0 = Normal appearance of mucosa; 1 = Mild disease (erythema, decreased vascular pattern); 2 = Moderate disease (marked erythema, lack of vascular pattern, any friability, erosions); 3 = Severe disease (spontaneous bleeding, ulceration).

  3. Number of Participants with Adverse Events (AEs)

    Time frame: Up to 98 Weeks

    An adverse event (AE) is defined as any untoward medical occurrence in a patient or clinical investigation participant administered a pharmaceutical product which does not necessarily have a causal relationship with this treatment. The investigator assesses the relationship of each event to the use of study.

Secondary outcomes

  1. Crohn's Disease Specific: Percentage of Participants who Achieve Endoscopic Remission

    Time frame: At Week 12

    Endoscopic remission is defined as Simple Endoscopic Score for Crohn's Disease (SES-CD) <= 4 and no sub score greater than 1 in any individual variable, as scored by a central reviewer.

  2. Crohn's Disease Specific: Percentage of Participants who Achieve Endoscopic Response

    Time frame: At Week 12

    The Simple Endoscopic Score for Crohn's Disease (SES-CD) assesses endoscopic disease severity by evidence of active intestinal mucosal inflammation. Endoscopic Response is defined as a decrease in SES-CD > 50% from Baseline, and/or endoscopic remission, as scored by central reader.

  3. Crohn's Disease Specific: Percentage of Participants who Achieve Endoscopic Response

    Time frame: At Week 28

    The Simple Endoscopic Score for Crohn's Disease (SES-CD) assesses endoscopic disease severity by evidence of active intestinal mucosal inflammation. Endoscopic Response is defined as a decrease in SES-CD > 50% from Baseline, and/or endoscopic remission, as scored by central reader.

  4. Crohn's Disease Specific: Percentage of Participants Achieving CDAI Clinical Remission

    Time frame: At Week 12

    Clinical remission is defined as Crohn's disease activity index (CDAI)<150.

  5. Crohn's Disease Specific: Percentage of Participants Achieving CDAI Clinical Remission

    Time frame: At Week 28

    Clinical remission is defined as Crohn's disease activity index (CDAI)<150.

  6. Crohn's Disease Specific: Percentage of Participants With Clinical Remission Per Stool Frequency/Abdominal Pain Score (SF/APS)

    Time frame: At Week 12

    SF/APS clinical remission is defined as the average daily SF ≤ 2.8 and not worse than Baseline AND average daily AP score ≤ 1 and not worse than Baseline.

  7. Crohn's Disease Specific: Percentage of Participants With Clinical Remission Per Stool Frequency/Abdominal Pain Score (SF/APS)

    Time frame: At Week 28

    SF/APS clinical remission is defined as the average daily SF ≤ 2.8 and not worse than Baseline AND average daily AP score ≤ 1 and not worse than Baseline.

  8. Ulcerative Colitis Specific: Percentage of Participants with Clinical Remission per modified Mayo Score (mMS)

    Time frame: At Week 12

    Clinical remission on the mMS is defined as Endoscopy subscore = 0 or 1, AND Rectal bleeding subscore = 0, AND Stool frequency subscore <= 1, AND not greater than baseline. The mMS is a composite score of UC disease activity based on the following 3 subscores: SFS, scored from 0 (normal number of stools) to 3 (5 or more stools more than normal); RBS, scored from 0 (no blood seen) to 3 (blood alone passed); ESS, scored from 0 (normal appearance of mucosa) to 3 (severe disease [spontaneous bleeding, ulceration]). The overall mMS ranges from 0 to 9 with higher scores representing more severe disease. The number of responders is calculated based on the total number of participants and estimated response rate, rounding to a nearest whole integer.

  9. Ulcerative Colitis Specific: Percentage of Participants with Clinical Remission per mMS

    Time frame: At Week 28

    Clinical remission on the mMS is defined as Endoscopy subscore = 0 or 1, AND Rectal bleeding subscore = 0, AND Stool frequency subscore <= 1, AND not greater than baseline. The mMS is a composite score of UC disease activity based on the following 3 subscores: SFS, scored from 0 (normal number of stools) to 3 (5 or more stools more than normal); RBS, scored from 0 (no blood seen) to 3 (blood alone passed); ESS, scored from 0 (normal appearance of mucosa) to 3 (severe disease [spontaneous bleeding, ulceration]). The overall mMS ranges from 0 to 9 with higher scores representing more severe disease. The number of responders is calculated based on the total number of participants and estimated response rate, rounding to a nearest whole integer.

  10. Ulcerative Colitis Specific: Percentage of Participants who Achieve Endoscopic Remission

    Time frame: At Week 12

    Endoscopic remission is defined as Mayo Endoscopic Subscore (ESS) of 0. Endoscopies were assessed by a blinded central reader and scored according to the following scale: 0 = Normal appearance of mucosa; 1 = Mild disease (erythema, decreased vascular pattern); 2 = Moderate disease (marked erythema, lack of vascular pattern, any friability, erosions); 3 = Severe disease (spontaneous bleeding, ulceration).

  11. Ulcerative Colitis Specific: Percentage of Participants Achieving Endoscopic Improvement

    Time frame: At Week 12

    Endoscopic improvement is defined as endoscopy subscore of 0 or 1. Endoscopies assessed by a blinded central reader and scored according to the following scale: 0 = Normal or inactive disease; 1 = Mild disease (erythema, decreased vascular pattern); 2 = Moderate disease (marked erythema, lack of vascular pattern, any friability, erosions); 3 = Severe disease (spontaneous bleeding, ulceration).

  12. Ulcerative Colitis Specific: Percentage of Participants Achieving Endoscopic Improvement

    Time frame: At Week 28

    Endoscopic improvement is defined as endoscopy subscore of 0 or 1. Endoscopies assessed by a blinded central reader and scored according to the following scale: 0 = Normal or inactive disease; 1 = Mild disease (erythema, decreased vascular pattern); 2 = Moderate disease (marked erythema, lack of vascular pattern, any friability, erosions); 3 = Severe disease (spontaneous bleeding, ulceration).

  13. Ulcerative Colitis Specific: Percentage of Participants who Achieve Clinical Response Per mMS

    Time frame: At Week 12

    Clinical response per mMS is defined as decrease from baseline >=2 points and >=30%, PLUS a decrease in RBS >= 1 or an absolute RBS <=1. The mMS is a composite score of UC disease activity based on the following 3 subscores: SFS, scored from 0 (normal number of stools) to 3 (5 or more stools more than normal); RBS, scored from 0 (no blood seen) to 3 (blood alone passed); ESS, scored from 0 (normal appearance of mucosa) to 3 (severe disease [spontaneous bleeding, ulceration]). The overall mMS ranges from 0 to 9 with higher scores representing more severe disease. The number of responders is calculated based on the total number of participants and estimated response rate, rounding to a nearest whole integer.

  14. Ulcerative Colitis Specific: Percentage of Participants who Achieve Clinical Response Per mMS

    Time frame: At Week 28

    Clinical response per mMS is defined as decrease from baseline >=2 points and >=30%, PLUS a decrease in RBS >= 1 or an absolute RBS <=1. The mMS is a composite score of UC disease activity based on the following 3 subscores: SFS, scored from 0 (normal number of stools) to 3 (5 or more stools more than normal); RBS, scored from 0 (no blood seen) to 3 (blood alone passed); ESS, scored from 0 (normal appearance of mucosa) to 3 (severe disease [spontaneous bleeding, ulceration]). The overall mMS ranges from 0 to 9 with higher scores representing more severe disease. The number of responders is calculated based on the total number of participants and estimated response rate, rounding to a nearest whole integer.

Study contacts

Contact information is provided by the study sponsor or research team.

ABBVIE CALL CENTER

CONTACT

[email protected]

844-663-3742

Sponsors and collaborators

Lead sponsor

AbbVie

Industry

Registry information

Official study title

A Phase 2 Platform Basket Study Evaluating Advanced Therapies in Subjects With Moderately to Severely Active Crohn's Disease or Ulcerative Colitis

Important dates

Study start
2026
Primary completion
2031
Study completion
2031
First posted
Jul 13, 2026
Registry last updated
Jul 13, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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