Assessment of Patients With Acute Pouchitis Treated With Antibiotics

Study Purpose

The purpose of this study is to evaluate the reliability and responsiveness of symptoms, endoscopic, and histological items for assessing pouchitis disease activity in patients undergoing standard of care (SOC) antibiotic therapy for treatment of pouchitis, in order to develop a novel pouchitis disease activity index.

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.

Observational [Patient Registry]
Eligible Ages 18 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:

  • - Male or female patients ≥ 18 years of age.
  • - IPAA for UC (J-pouch only) ≥ 6 months prior to screening.
  • - Diagnosis of acute pouchitis at screening by stool frequency (an absolute value of ≥ 6 stools / day AND an increase of ≥ 3 stools / day above the post-IPAA baseline), and local endoscopy (presence of ≥ 1 erosion or ulceration of the pouch on endoscopy [not including ulceration occurring within 1 cm of the pouch staple or pouch suture line]).
  • - Not currently taking antibiotics for pouchitis or previous systemic antibiotic use for any reason within 4 weeks of screening.
  • - Current treatment with 5-aminosalicylic acid drugs, immunosuppressants, antidiarrheals, antimotility agents, and probiotics is permitted, if subject has received a stable dose for ≥ 4 weeks prior to screening.
Dose of concomitant therapy must remain stable during the study period.
  • - Ability of subject to participate fully in all aspects of this clinical trial.
  • - Written informed consent must be obtained and documented.

Exclusion Criteria:

  • - Pouch formations besides J-pouch (e.g., W-, S- and Kock pouches).
  • - IPAA for familial adenomatous polyposis.
  • - Pouchitis caused by other inflammatory etiologies (e.g., ischemia or infection).
  • - Antibiotic-dependent pouchitis, defined by ≥ 3 months of cumulative antibiotic use over the 12 months prior to screening.
  • - Isolated cuffitis, pouch-anal or pouch-ileal anastomotic stricture, perforating complications, or pelvic sepsis.
  • - Known Crohn's disease (CD) or suspected CD of the pouch, defined as complex perianal/pouch fistula and/or extensive length of prepouch ileitis with deep ulceration.
  • - Anticipated changes in therapy during study period.
  • - Use of oral corticosteroids.
Subjects must have discontinued oral corticosteroids within 1 month of screening.
  • - Current use of any biological therapy (e.g., anti-tumour necrosis factor (TNF) therapies, ustekinumab, vedolizumab) or advanced oral small molecule drug (e.g., Janus kinase [JAK] inhibitors).
Subjects must have discontinued biologic or oral small molecule therapy within 12 weeks or 5 half-lives of screening (or within 4 weeks if drug levels are undetectable).
  • - Failure of ≥ 2 biologics (i.e., biologic and JAK inhibitor, 2 biologics in the same class, or 2 biologics from different classes) for the treatment of pouchitis.
  • - Women who are pregnant or breastfeeding.
  • - Known history of allergy, intolerance, or are refractory to ciprofloxacin AND metronidazole AND any component of amoxicillin/potassium clavulanate combination.
  • - Unable to undergo endoscopic evaluation.
  • - Serious underlying disease other than acute pouchitis and UC that in the opinion of the investigator may interfere with the subject's ability to participate fully in the study.
  • - History of alcohol or drug abuse that in the opinion of the investigator may interfere with the subject's ability to comply with the study procedures.
  • - Prior enrolment in the current study.

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.

Lead Sponsor

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

Alimentiv Inc.
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 United States

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

Pouchitis, Ulcerative Colitis
Additional Details

This is a prospective, open-label observational study of patients with acute pouchitis being treated with SOC antibiotic therapy (a known effective therapy in most patients), to evaluate the reliability and responsiveness of existing pouchitis indices and component items for assessing pouchitis disease activity. A total of 43 subjects will be recruited and enrolled at clinical sites in North America and Europe. All subjects with suspected acute pouchitis will undergo pouchoscopy with biopsies and blood and stool sample collection at screening and receive 28 days of antibiotic therapy. Subjects will return to the clinic for a follow-up clinical assessment, pouchoscopy with biopsies forendoscopic and histologic assessments of disease activity, respectively, and blood and stool sample collection for inflammatory biomarker, molecular, and microbiome analyses approximately 6 weeks after starting antibiotic therapy. Subjects will collect an additional stool sample for fecal calprotectin (FC) and microbiome analyses and metabolomics at Week 4 and return the sample to the clinic in person or by mail. Subjects will rate their pouchitis symptoms in an electronic diary beginning at least 3 days before initiation of antibiotic therapy through to the Week 6 study visit. Total anticipated duration of subject participation is approximately 6 weeks after initiating antibiotic therapy. Endoscopic and Histologic Disease Activity Assessments: Blinded expert endoscopists and histopathologists will serve as central readers for this study and score pouchoscopy videos and histologic slide images, respectively. Paired pouchoscopy videos and histologic slide images (baseline and Week 6) of adequate quality will be scored by central readers (see Outcome Measures). Each central reader will score all Week 6 pouchoscopy videos and histologic slide images twice, 2 weeks apart, for assessing reliability, and all baseline pouchoscopy videos/slide images once to be compared to scores posttreatment scores for assessing responsiveness. Novel Pouchitis Disease Activity Index Development: A novel index will be developed using multiple linear regression with items that have moderate reliability and responsiveness. The index will be internally validated using the bootstrap method with 2000 replicates. Primary Objective: The primary objective of this study is to evaluate the reliability and responsiveness of patient-reported symptoms and endoscopic and histologic items for assessing pouchitis disease activity in patients undergoing standard of care (SOC) antibiotic therapy. Secondary Objective: A secondary objective of this study is to develop a novel index for assessing pouchitis disease activity. Exploratory Objectives: 1. Identify biomarkers associated with (non)response to antibiotics in pouchitis; 2. Identify biomarkers associated with patient-reported symptoms, endoscopic, and histologic component scores and items, and pouchitis disease activity indices; 3. Describe the dynamics of the microbiome following introduction and withdrawal of antibiotics in pouchitis. Additional exploratory analyses may be established during the review of the study results.

Arms & Interventions


: Open-label observational study

This study will evaluate the reliability and responsiveness of patient-reported symptoms and endoscopic and histologic items for assessing pouchitis disease activity in 43 patients undergoing standard of care (SOC) antibiotic therapy.


Other: - Observational, No intervention

Open-label observational study that will evaluate the reliability and responsiveness of patient-reported symptoms and endoscopic and histologic items for assessing pouchitis disease activity in 43 patients undergoing standard of care (SOC) antibiotic therapy.

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Mount Sinai Hospital, New York, New York




Mount Sinai Hospital

New York, New York, 10029

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