Evaluation of Molecular Mechanisms of Non-response to Therapy in Patients With Inflammatory Bowel Disease

Study Overview
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Brief Summary
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Inflammatory bowel diseases (IBD) represent a group of immune-mediated disorders, in which currently unidentified trigger factors drive the manifestation of chronic relapsing- remitting destructive inflammatory episodes in the gut. IBD comprise two main disease entities, ulcerati\ie colitis (UC) and Crohn s disease (CD). The diseases differ in anatomical distribution, with continuous, uniform inflammation restricted to the colon in UC, and multifocal inflammation extended throughout the entire gastrointestinal tract from mouth to anus in CD. Clinical symptoms of IBD may include bloody stools, abdominal pain, fatigue, diarrhoea, fever and weight loss. Extra-intestinal symptoms occurring in up to 40% of patients, e.g. anaemia, skin lesions (e.g. erythema nodosum, pyoderma), arthritis and uveitis, and other complications directly related to the disease organ, such as fistula in CD are considered to reflect an overwhelming systemic inflammatory state. Disease onset typically manifests at age 15-35 years, men and women are almost equally affected. In addition, paediatric forms of IBD that often represent complex, se\/ere monogenic forms of the disease, are seen. The incidence rates of IBD in Europe are about 6.3 (CD) and 11.8 (UC) per 100.000 persons. With growing incidence rates and overall reduced mortality the lifetime prevalence of IBD is expected to rise. The estimated lifetime prevalence of 0.3%-0.5% of the European population corresponds to estimates of 1.5-2 million patients with IBD. Appropriate selection of therapies and their timing of introduction (decision support) in the course of IBD will be essential to reach a higher degree of disease control (across patients and within individual patients) than it is achie\led today. In many instances, comparati\ie data is missing and combinations or sequential therapies are not developed. In summary, despite some treatment successes, major challenges remain. The investigators have decided to include patients with inflammatory bowel disease (IBD) in which targeted therapies are administered as part of standard helathcare and which aims at identifiyng solid biomarker signatures as well as molecular pathways and mechanisms linked to response and non-response to therapy. Choice od medications (which are all approved for first line use) is by treating physicians. All follow-up procedures are according to standards of care.

Official Title
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Evaluation of Molecular Mechanisms of Non-response to Treatments, Relapses and Remission in Ulcerative Colitis and Crohn's Disease Patients Receiving First Time Standard of Care Biological Treatment

Conditions
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Crohn's Disease, Ulcerative Colitis

Intervention / Treatment
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* Other: Samples


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male and female patients ≥ 18 years of age (at the time of signing the Informed Consent) Person informed about study organization and having signed the informed consent. Established diagnosis of Crohn's dsease or ulcerative colitis with a minimum disease duration of 3 months Moderate to severe disease activity UC : Mayo Score ≥ 6 including endoscopy score of ≥ 2 CD : CDAI score betwenn 220 and 450 (inclusive) Indication to start any biological or small molecule agent (anti-TNF, anti-IL 21/23, anti-integrin and JAK-inhibitors) In case of treatment with corticosteroid : stable dose for at least 3 weeks prior to baseline, dosage ≤ 20 mg prednisone Indication for colonoscopy for the assessment of disease activity as for standards of care and current guidelines Person affiliated to or beneficiary of a social security plan Exclusion Criteria: Diagnosis of indeterminate colitis, microscopic colitis, ischaemic colitis, infectious colitis, radiation colitis Absolute contraindications to colonoscopy procedures, complication during previous endoscopy Bleeding disorders Indication for surgery for UC Rectal topical therapy (enemas or suppositories) ≤ 2 weeks prior to baseline Treatment with > 20 mg prednisone within 3 weeks prior to baseline Anaemia (haemoglobbin < 10g/dl) at baseline Subject unable to comply with the study procedures Person referred in articles L.1121-5, L. 1121-7 and L.1121-8 of the Public Health Code: Pregnant, parturient or breastfeeding woman Minor person (non-emancipated) Adult person under legal protection (any form of public guardianship) Adult person incapable of giving consent and not under legal protection Person deprived of liberty for judicial or administrative decision, person under psychiatric care as referred in articles L. 3212-1 and L. 3213-1.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Samples<br>The intervention is to collect blood; urine; saliva and stool samples but also mucosal biopsies at each protocol visits (baseline and follow up visits). | Other: Samples<br>* The intervention is to collect blood; urine; saliva and stool samples but also mucosal biopsies at each protocol visits (baseline and follow up visits).<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To identify solid biomarkers signatures as well as molecular pathways and mechanisms linked to response and non-response to therapy in ulcerative colitis patient. | -For Ulcerative Colitis (UC) patient: overall Mayo score correlated with Mayo endoscopy and bleeding subscore will be measured. Mayo score composed by 4 items: stool frequency; rectal bleeding, mucosal appearance at endoscopy and physician rating of disease activity. Mayo score: Score <2 : no activity Score between 3 and 5: mild activity Score between 6 and 10 :moderate activity Score >11 : severe activity | week 14 | 
| To identify solid biomarkers signatures as well as molecular pathways and mechanisms linked to response and non-response to therapy in Crohn's disease patient. | -For Crohn's Disease (CD) patient : Crohn's disease activity index (CDAI) and simple endoscopic response (SES-CD) wil be measured. CDAI is the sum of 8 components: number of liquid or soft stools, daily abdominal pain, patient well-being, complications, use of diphenoxylate or opiates as anti-diarreheal, abdominal mass, hematocrit and body weight. Level of disease activity: Non-active disease: CDAI < 150 Mild disease activity: CDAI >= 150 and <220 Moderate disease activity: CDAI >= 220 and <450 Severe disease activity: CDAI > 450 SES-CD assesses the size of mucosal ulcers, the ulcerated surface, the endoscopic extension and the presence of stenosis. SES-CD score: 0 - 2 remission 3 - 6 mild endoscopic activity 7 - 15 moderate endoscopic activity > 15 severe endoscopic activity | week 14 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| To correlate identifed potential biomarkers with disease activity, progression and response to therapy by clinical remission in Crohn's disease patient | Remission will be evaluated by mucosal healing (simple endoscopic response (SES-CD)). SES-CD assesses the size of mucosal ulcers, the ulcerated surface, the endoscopic extension and the presence of stenosis. SES-CD score: 0 - 2 remission 3 - 6 mild endoscopic activity 7 - 15 moderate endoscopic activity > 15 severe endoscopic activity | week 52 | 
| To correlate identifed potential biomarkers with disease activity, progression and response to therapy by clinical remission in Ulcerative colitis patient | Remission will be evaluated by mucosal healing (Mayo score). Mayo score composed by 4 items: stool frequency; rectal bleeding, mucosal appearance at endoscopy and physician rating of disease activity. Mayo score: Score <2 : no activity Score between 3 and 5: mild activity Score between 6 and 10 :moderate activity Score >11 : severe activity | week 52 | 
| To correlate identifed potential biomarkers with disease activity, progression and response to therapy by patient-reported outcomes | Symptomatic remission assessed by patient-reported outcomes | week 52 | 
| To correlate identifed potential biomarkers with disease activity, progression and response to therapy by complications-reported. | Complications-reported: hospitalizations due to inflammatory-bowel disease; treatment intensification including introduction of toxic long-term therapies (i.e. systemic glucocorticoids); presence of new stenosis; presence of new fistula ;new infections or intestinal surgery known | week 52 | 
| To correlate identifed potential biomarkers with disease activity, progression and response to therapy by disease progression. | Presence of flares e.g. | week 52 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Crohn's disease, ulcerative colitis, disease activity, therapy reponse, biomarkers