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NCT Number: NCT07071519

A Study to Learn More About How Risankizumab Works in Young Participants With Ulcerative Colitis

Ulcerative colitis (UC) is a type of inflammatory bowel disease that causes inflammation and bleeding from the lining of the rectum and colon (large intestine). This study will assess how Risankizumab moves through the body as well as how safe and effective it is in treating pediatric participants with moderate to severely active UC. Adverse events and change in disease activity will be assessed.

Risankizumab is an approved medication for moderate to severe UC in multiple countries and is being developed for the treatment of UC in pediatrics. This study is comprised of 3 cohorts that may participate in 3 substudies (SS). Cohort 1 will enroll participants with ages from 6 to less than 18 years. Cohort 2 will enroll participants with ages from 2 to less than 6 years. Cohort 3 will enroll participants with ages from 2 to less than 18 years. SS1 is an open-label induction period where participants will receive a weight-based induction regimen of risankizumab. SS2 is a double-blind maintenance period where participants will be randomized to receive 1 of 2 doses of weight-based maintenance regimen of risankizumab. SS3 is an open-label extension period where participants will receive risankizumab based off of their response in SS2. Around 120 pediatric participants with UC will be enrolled at around 80 sites worldwide.

Participants in SS1 will receive risankizumab intravenously during the 12-week induction period. Participants in SS2 will receive risankizumab subcutaneously during the 52-week randomized maintenance period. Participants in SS3 will receive risankizumab subcutaneously during the 208-week open label period. Participants will be followed-up for approximately 140 days.

There may be higher treatment burden for participants in this trial compared to their standard of care. 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, checking for side effects and completing questionnaires.

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Key information

Conditions

Ulcerative Colitis Colitis Colitis, Ulcerative Colonic Diseases Digestive System Diseases Gastroenteritis Gastrointestinal Diseases Inflammatory Bowel Diseases Intestinal Diseases

Age range

2 year–17 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 3

Primary location

Cliniques Universitaires UCL Saint-Luc /ID# 270123, Brussels, Brussels Capital, Belgium

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Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • Active ulcerative colitis (UC) with an modified Mayo Score (mMS) of 5 to 9 points and endoscopic subscore of 2 to 3 (confirmed by central reader).
  • Demonstrated intolerance or inadequate response (IR) to one or more of the following categories of drugs:

aminosalicylates (except in countries where failure of this drug class is not sufficient for eligibility), oral locally acting corticosteroids, systemic steroids (prednisone or equivalent), immunomodulators (IMMs), and/or biologic therapies, as outlined in the protocol.

  • Subjects must have a documented history of UC for at least 3 months prior to Baseline, confirmed by colonoscopy during the screening period, with exclusion of current infection, colonic dysplasia and/or malignancy. Documentation of pathology results consistent with the diagnosis of UC must be available.

Exclusion criteria

  • Participants who have had a major surgery performed within 12 weeks prior to Baseline or planned during the conduct of the study (e.g., inguinal hernia repair, cholecystectomy, intestinal resection).
  • Participants who have concurrent clinically significant medical conditions other than the indication being studied or any other reason that the investigator determines would interfere with the subject's participation in this study, would make the subject an unsuitable candidate to receive study treatment, or would put the subject at risk by participating in the study.

Treatment and study plan

Risankizumab

Drug

Risankizumab intravenous (IV) infusion

Other names: ABBV-066

Primary outcomes

  1. PK Lead-In Cohort 1: Maximum Observed Serum Concentration (Cmax)

    Time frame: At Week 64

    Maximum observed plasma concentration (Cmax)

  2. PK Lead-In Cohort 2: Maximum Observed Serum Concentration (Cmax)

    Time frame: At Week 64

    Maximum observed plasma concentration (Cmax)

  3. PK Lead-In Cohort 1: Time to Maximum Serum Concentration (Tmax)

    Time frame: At Week 64

    Time to maximum plasma concentration (Tmax)

  4. PK Lead-In Cohort 2: Time to Maximum Serum Concentration (Tmax)

    Time frame: At Week 64

    Time to maximum plasma concentration (Tmax)

  5. PK Lead-In Cohort 1: Area Under the Serum Concentration-Time Curve Over the Dosing Interval (AUCtau)

    Time frame: At Week 64

    Area under the serum concentration-time curve over the dosing interval (AUCtau)

  6. PK Lead-In Cohort 2: Area Under the Serum Concentration-Time Curve Over the Dosing Interval (AUCtau)

    Time frame: At Week 64

    Area under the serum concentration-time curve over the dosing interval (AUCtau)

  7. Expansion Cohort 3: Achievement of Clinical Remission per Modified Mayo Score (mMS) Among Week 12 Clinical Responders per mMS

    Time frame: At Week 64

    Clinical remission on the mMS is defined as defined as Stool Frequency Subscore (SFS) ≤ 1 and not greater than Baseline, Rectal Bleeding Subscore (RBS) = 0, and Mayo Endoscopic Subscore (MES) ≤ 1

  8. Number of Participants With Adverse Events

    Time frame: Up to 292 Weeks

    An adverse event (AE) is defined as any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. The investigator assessed the relationship of each event to the use of study drug as either probably related, possibly related, probably not related or not related

Secondary outcomes

  1. PK Lead-In Cohort 1: Achievement of clinical remission per mMS among Week 12 responders per mMS

    Time frame: At Week 64

    Clinical remission on the mMS is defined as defined as Stool Frequency Subscore (SFS) ≤ 1 and not greater than Baseline, Rectal Bleeding Subscore (RBS) = 0, and Mayo Endoscopic Subscore (MES) ≤ 1

  2. PK Lead-In Cohort 2: Achievement of clinical remission per mMS among Week 12 responders per mMS

    Time frame: At Week 64

    Clinical remission on the mMS is defined as defined as Stool Frequency Subscore (SFS) ≤ 1 and not greater than Baseline, Rectal Bleeding Subscore (RBS) = 0, and Mayo Endoscopic Subscore (MES) ≤ 1

  3. PK Lead-In Cohort 1: Achievement of clinical remission per mMS

    Time frame: At Week 12

    Clinical remission on the mMS is defined as Stool Frequency Subscore (SFS) ≤ 1 and not greater than Baseline, Rectal Bleeding Subscore (RBS) = 0, and Mayo Endoscopic Subscore (MES) ≤ 1

  4. PK Lead-In Cohort 2: Achievement of clinical remission per mMS

    Time frame: At Week 12

    Clinical remission on the mMS is defined as Stool Frequency Subscore (SFS) ≤ 1 and not greater than Baseline, Rectal Bleeding Subscore (RBS) = 0, and Mayo Endoscopic Subscore (MES) ≤ 1

  5. PK Lead-In Cohort 1: Achievement of clinical response per mMS

    Time frame: At Week 12

    Clinical response per mMS is defined as decrease in mMS by ≥ 2 points and ≥ 30% from Baseline with a decrease in Rectal Bleeding Subscore (RBS) of ≥ 1 or an absolute RBS of 0 or 1.

  6. PK Lead-In Cohort 2: Achievement of clinical response per mMS

    Time frame: At Week 12

    Clinical response per mMS is defined as decrease in mMS by ≥ 2 points and ≥ 30% from Baseline with a decrease in Rectal Bleeding Subscore (RBS) of ≥ 1 or an absolute RBS of 0 or 1.

  7. PK Lead-In Cohort 1: Achievement of endoscopic improvement

    Time frame: At Week 12

    Endoscopic improvement defined as MES ≤ 1

  8. PK Lead-In Cohort 2: Achievement of endoscopic improvement

    Time frame: At Week 12

    Endoscopic improvement defined as MES ≤ 1

  9. PK Lead-In Cohort 1: Symptomatic response per partial mMS

    Time frame: At Week 12

    Symptomatic response per partial mMS is defined as decrease in partial mMS by ≥ 1 points and ≥ 30% from Baseline with decrease in RBS of ≥ 1 or an absolute RBS of 0 or 1.

  10. PK Lead-In Cohort 2: Symptomatic response per partial mMS

    Time frame: At Week 12

    Symptomatic response per partial mMS is defined as decrease in partial mMS by ≥ 1 points and ≥ 30% from Baseline with decrease in RBS of ≥ 1 or an absolute RBS of 0 or 1.

  11. PK Lead-In Cohort 1: Achievement of clinical response per mMS among Week 12 responders per mMS

    Time frame: At Week 64

    Clinical response per mMS is defined as decrease in mMS by ≥ 2 points and ≥ 30% from Baseline with a decrease in Rectal Bleeding Subscore (RBS) of ≥ 1 or an absolute RBS of 0 or 1.

  12. PK Lead-In Cohort 2: Achievement of clinical response per mMS among Week 12 responders per mMS

    Time frame: At Week 64

    Clinical response per mMS is defined as decrease in mMS by ≥ 2 points and ≥ 30% from Baseline with a decrease in Rectal Bleeding Subscore (RBS) of ≥ 1 or an absolute RBS of 0 or 1.

  13. PK Lead-In Cohort 1: Achievement of endoscopic improvement among Week 12 responders per mMS

    Time frame: At Week 64

    Endoscopic improvement defined as MES ≤ 1

  14. PK Lead-In Cohort 2: Achievement of endoscopic improvement among Week 12 responders per mMS

    Time frame: At Week 64

    Endoscopic improvement defined as MES ≤ 1

  15. PK Lead-In Cohort 1: Achievement of corticosteroid-free (at least 90 days without corticosteroid exposure) clinical remission per mMS at Week 64 among Week 12 responders per mMS

    Time frame: Up to Week 64

  16. PK Lead-In Cohort 2: Achievement of corticosteroid-free (at least 90 days without corticosteroid exposure) clinical remission per mMS at Week 64 among Week 12 responders per mMS

    Time frame: Up to Week 64

  17. Expansion Cohort 3: Achievement of clinical remission per mMS

    Time frame: At Week 12

  18. Expansion Cohort 3: Achievement of clinical response per mMS

    Time frame: At Week 12

  19. Expansion Cohort 3: Achievement of endoscopic improvement

    Time frame: At Week 12

  20. Expansion Cohort 3: Symptomatic response per partial mMS

    Time frame: At Week 12

  21. Expansion Cohort 3: Achievement of clinical response per mMS among Week 12 responders per mMS

    Time frame: At Week 64

  22. Expansion Cohort 3: Achievement of endoscopic improvement among Week 12 responders per mMS

    Time frame: At Week 64

  23. Expansion Cohort 3: Achievement of corticosteroid-free clinical remission per mMS among Week 12 responders per mMS

    Time frame: At Week 64

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 3, Multi-Center Study to Evaluate the Pharmacokinetics, Efficacy, and Safety of Risankizumab With Open-Label Induction, Randomized Double-Blind Maintenance, and Open-Label Long-Term Extension Periods in Pediatric Subjects (2 to < 18 Years of Age) With Moderately to Severely Active Ulcerative Colitis

Acronym: MIGHTY

Important dates

Study start
2025
Primary completion
2034
Study completion
2034
First posted
Jul 17, 2025
Registry last updated
Jul 23, 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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