A Study to Learn About the Safety of Vedolizumab and How Well it Works in Children and Teenagers With Active Chronic Pouchitis

Takeda

Status and phase: Not yet enrolling; Phase 3

Conditions: Pouchitis

Treatments: Drug: Vedolizumab; Drug: Concomitant Antibiotic Therapy

Study type: Interventional

Funder types: Industry

Identifiers

NCT06443502

Vedolizumab-3041

2023-504773-20 (Other Identifier)

Details and patient eligibility

About

When some people have their large bowel removed, a surgeon can make a "pouch" from part of the small bowel to connect it to the back passage (anus). Pouchitis is when the pouch becomes inflamed (swollen) or infected. The main aim of this study is to find out if vedolizumab improves pouchitis symptoms and pouch inflammation. Other aims include to find out if vedolizumab is well tolerated and if it causes any medical problems (adverse events or side effects) and to look for any changes in the well-being of participants during their treatment with vedolizumab.

Participants will receive up to 6 infusions of vedolizumab. First 3 infusions are in first 6 weeks (Day 1, Week 2 and Week 6). Participants who are getting benefit may continue with the treatment for up to 7.5 months (30 weeks) in total. After completing treatment with vedolizumab, participants will visit their clinic for a health check at Week 34. One final health check will be scheduled 4.5 months (18 weeks) after the last vedolizumab infusion.

Participants who continue to benefit from their treatment at the end of this study will be invited to continue treatment with vedolizumab in another clinical study (Vedolizumab-3042).

Full description

The drug being tested in this study is called vedolizumab. This study will look at the efficacy, safety, tolerability, pharmacokinetics (PK), and immunogenicity of vedolizumab in pediatric participants with active chronic pouchitis.

The study will enroll approximately 30 participants. All the participants will be enrolled in a single treatment group to receive treatment with vedolizumab along with ciprofloxacin, metronidazole, or other antibiotics based on participant's weight mentioned as follows:

• Participants with body weight greater than or equal to (>=) 30 kilogram (kg) will receive vedolizumab, high dose
• Participants with body weight greater than (>) 15 to less than (<) 30 kg will receive vedolizumab, medium dose
• Participants with body weight 10 to 15 kg will receive vedolizumab, low dose

All participants will receive vedolizumab intravenous infusion at Day 1, Weeks 2, 6, 14, 22, and 30 along with concomitant antibiotic treatment from Day 1 through Week 2.

This multi-center trial will be conducted globally. The overall duration of the study is up to 57 weeks. Participants will be followed up for 18 weeks after the last dose of the study drug for safety.

Enrollment: 30 estimated patients

Sex: All

Ages: 2 to 17 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. The participant weighs >=10 kg at the time of screening and first dose.

2. Has active chronic pouchitis, defined by a mPDAI score >=5 assessed using the 3-day average of participant-reported clinical symptoms prior to the screening endoscopy (that is [ie] video pouchoscopy with biopsy) or bowel preparation for the endoscopy and a minimum mPDAI endoscopic subscore of 2 (outside the staple or suture line) and either:

   • Has had >=1 previous episodes of pouchitis within 1 year before the screening visit, with symptoms lasting at least 4 weeks treated with >=2 weeks of antibiotic or other prescription therapy (ie, other antibiotics, probiotics, immunomodulators, or anti-tumor necrosis factor [TNFs] within 1 year before screening). Or
   • Has had an inadequate response with, or lost response to, or are intolerant to antibiotic therapy (ie, requiring maintenance antibiotic therapy taken for >=4 weeks immediately before the baseline endoscopy visit or not able to receive or continue antibiotic treatment due to intolerance or other contraindication).

Exclusion criteria

The exclusion criteria are divided into 3 categories: active chronic pouchitis exclusion criteria, infectious disease exclusion criteria, and general exclusion criteria.

Active Pouchitis Exclusion Criteria:

1. Has symptoms believed to be predominantly due to irritable pouch syndrome.

2. Has isolated cuffitis.

3. Is found to have dysplasia at the screening endoscopy.

4. Has mechanical complications of the pouch (for example [e.g.] pouch stricture or pouch fistula).

5. Currently requires or has a planned surgical intervention during the study.

6. Has a diverting stoma.

   Infectious Disease Exclusion Criteria:

7. Has evidence of an active infection (e.g. sepsis, cytomegalovirus [CMV], or listeriosis) during screening.

8. Had a clinically significant infection (e.g. pneumonia, pyelonephritis, coronavirus disease 2019 [COVID-19]) within 35 days before first dose of study drug.

9. Has active or latent tuberculosis (TB), as evidenced by a diagnostic TB test performed within 3 months of screening or during the screening period that is positive, as defined by:

   • A positive QuantiFERON test or 2 successive indeterminate QuantiFERON tests, or
   • A TB skin test reaction >=5 millimeter (mm). NOTE: If participant have received Bacillus Calmette-Guérin vaccine, then a QuantiFERON TB Gold test should be performed instead of the TB skin test.

   NOTE: Participants with documented previously treated TB with a negative QuantiFERON test can be included in the study.

10. Has evidence of positive hepatitis B surface antigen (HBsAg) or hepatitis B core antibody (HBcAb). Hepatitis B virus (HBV) immune participants (e.g. HBsAg negative and hepatitis B antibody positive) may, however, be included.

    NOTE: If a participant tests negative for HBsAg, but positive for HBcAb, the participant would be considered eligible if the absence of HBV DNA is confirmed by HBV DNA polymerase chain reaction reflex testing performed in the central laboratory.

11. Has chronic hepatitis C virus (HCV) (ie, positive HCV antibody [HCVAb] and HCV Ribonucleic Acid [RNA]).

    NOTE: Participants who are HCVAb-positive without evidence of HCV RNA may be considered eligible (spontaneous viral clearance or previously treated and cured [defined as no evidence of HCV RNA at least 12 weeks before baseline]).

12. Has any identified congenital or acquired immunodeficiency (e.g. common variable immunodeficiency, HIV infection, organ transplantation).

13. Has positive stool studies for ova and/or parasites or stool culture at screening visit.

14. Has positive Clostridium difficile stool test at screening visit.

    General Exclusion Criteria:

15. Is taking, has taken, or is required to take any excluded medications.

16. Has active cerebral/meningeal disease, signs/symptoms, or history of progressive multifocal leukoencephalopathy (PML) or any other major neurological disorders, including stroke, multiple sclerosis, brain tumor, or neurodegenerative disease.

17. Has evidence of dysplasia or history of malignancy other than a successfully treated nonmetastatic cutaneous squamous cell or basal cell carcinoma or localized carcinoma in situ of the cervix.

18. Has any unstable or uncontrolled cardiovascular, pulmonary, hepatic, renal, GI, genitourinary, hematologic, coagulation, immunological, endocrine/metabolic, neurologic, or other medical disorder that, in the opinion of the investigator, would confound the study results or compromise participant safety.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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30 participants in 1 patient group

Vedolizumab

Experimental group

Description:

Vedolizumab, high dose in participants with body weight \>=30 kg, medium dose in participants with body weight \>15 to \<30 kg and low dose in participants with body weight 10 to 15 kg, infusion, intravenously at Day 1, Weeks 2 and 6 during induction period and every 8 weeks (Q8W) at Weeks 14, 22 and 30 during maintenance period along with ciprofloxacin, metronidazole, vancomycin, amoxicillin clavulanate or rifaximin concomitant antibiotics, orally from Day 1 to Week 2 during induction period (unless intolerant or contraindicated).

Treatment:

Drug: Concomitant Antibiotic Therapy

Drug: Vedolizumab