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Twin cohort for the study of (pre)clinical Inflammatory Bowel Disease in the Netherlands
The TWIN-study



- candidate number27725
- NTR NumberNTR6681
- ISRCTNISRCTN no longer applicable
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR7-aug-2017
- Secondary IDs17-333 METC van het UMC Utrecht
- Public TitleTwin cohort for the study of (pre)clinical Inflammatory Bowel Disease in the Netherlands
The TWIN-study
- Scientific TitleTwin cohort for the study of (pre)clinical Inflammatory Bowel Disease in the Netherlands
The TWIN-study
- ACRONYMTWIN-IBD study
- hypothesisPrimary Objective: To gain insight in the disease mechanisms of IBD.
Secondary Objective(s): To identify biomarkers and study functional and mechanistic properties of the mucosal immune system, gut and oral microbiome, epithelium, mucus barrier, metabolome and nutritional factors in established and (pre)clinical IBD. Furthermore, we strive to identify symptoms and quality of life alterations associated with IBD.
- Healt Condition(s) or Problem(s) studiedInflammatory bowel disease, Crohn's disease, Ulcerative Colitis, Preclinical phase, Twins
- Inclusion criteriaInclusion criteria for IBD-discordant and IBD-concordant twins or multiples:
- Born as a sibling of, either a monozygous or dizygous, twin pair or multiplex
- One or more twin-siblings are affected with IBD, i.e. CD, UC or IBD unspecified (confirmed by clinical, endoscopic and histological features)
- Age: 16 years and older

Inclusion criteria for the unaffected controls (preferably twins or multiples):
- None of the siblings of the twin are affected with IBD, i.e. CD, UC or IBD unspecified
- Age: 16 years and older
- Exclusion criteria- No consent to participate in the study.
- mec approval receivedyes
- multicenter trialno
- randomisedno
- group[default]
- Type[default]
- Studytypeobservational
- planned startdate 1-sep-2017
- planned closingdate1-aug-2022
- Target number of participants444
- InterventionsThis is an observational cohort study, designed to explore factors possibly contributing to the pathogenesis of Inflammatory Bowel Disease.
From all participants the following data will be collected:
- Demographics
- Disease history
- Medication history
- Current medication use
- Risk factors
- Family history
- Quality of life
- Food frequency questionnaires

From all participants the following samples will be collected:
- Feces
- Pharyngeal swabs
- Urine
- Blood
- Rectal biopsies
- Colonic or ileal biopsies (in case of a colonoscopy for a clinical indication)
- Primary outcomeThe association of the following factors with established and preclinical IBD will be studied:
- Environmental factors
- Early signs and symptoms of IBD development
- Immunological phenotyping and function
- Gut and oral microbiota anlayses
- Metabolome analyses
- Mucus barrier analyses
- Epithelium analyses
- DNA-sequencing analyses
- Secondary outcome
- TimepointsParticipants are invited for follow-up visits every 6 months during a period of 2 years. Afterwards the possible development of IBD will be assessed on a regular basis.
- Trial web sitewww.umcutrecht.nl/twinibd
- statusopen: patient inclusion
- CONTACT FOR PUBLIC QUERIES Eelco Brand
- CONTACT for SCIENTIFIC QUERIESMD, PhD B. Oldenburg
- Sponsor/Initiator University Medical Center Utrecht (UMCU)
- Funding
(Source(s) of Monetary or Material Support)
Alexandre Suerman program, University Medical Center Utrecht
- Publications
- Brief summaryInflammatory Bowel Diseases (IBD), i.e. Crohn’s Disease (CD) and Ulcerative Colitis (UC), are thought to arise in genetically susceptible individuals in the context of environmental triggers, with a potential dominant role for the interplay between the gut microbiota, and the mucosal immune system. However, the relative importance and the exact role of these factors in the pathogenesis of IBD is presently unknown. Interpretation of published research in this field is often hampered by reverse causation, and data generated in animal models cannot be directly extrapolated to the human condition. The disease is probably triggered years before the occurrence of symptoms, but currently patients are only identified when clinical disease is established. The preclinical phase of IBD might hold the key to understanding the pathogenesis of IBD and could provide a huge window of opportunity of halting or even preventing disease development. At this time, data on this phase of the disease are virtually non-existent. What we do know is that unaffected twin-siblings of an IBD affected individual are at increased risk of developing IBD. Therefore, studying IBD-discordant, IBD-concordant and non-IBD-concordant twins or multiples gives the unique opportunity to 1) define mechanisms that underlie (the early development of) IBD and 2) identify markers of (pre)clinical IBD.
- Main changes (audit trail)
- RECORD7-aug-2017 - 21-sep-2017


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