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A monocentric pilot studying intestinal organoids from endoscopic biopsies of IBD (Crohn and ulcerative colitis), FAP patients and healthy controls. Investigate the morphological characteristics of organoids, the expression of genes and proteins of the Wnt/APC/beta-catenin pathway within both ISC.
Intestinal organoids are 3D mini-guts produced in vitro based on intestinal stem cell (ISC) capabilities. These organoids contain all of the intestinal epithelial cells. The renewal of the two kinds of ISCs, which are present at the bottom of intestinal crypts, is controlled by Wnt/APC/beta-catenin pathway. Mutations of genes involved in this pathway are found in intestinal polyposes like familial adenomatous polyposis (FAP, APC gene).
This model is of interest to study early pathophysiological events occurring within intestinal epithelium, in the context of FAP and inflammatory bowel diseases (IBD). An excessive proliferation or an abnormal healing is found in FAP and IBD respectively. Investigators hypothesized that it could specifically involved one of the 2 ISCs. Columnar basal cells (CBC) and ISC located at the +4 position from the bottom of the crypt (ISC+4) can both differentiate into absorptive or secretory intestinal epithelial cells. However, CBC and ISC+4 could have different metabolic, migratory functions, or stress survival.
Investigators designed a monocentric pilot study to develop intestinal organoids from endoscopic biopsies of IBD (Crohn and ulcerative colitis), FAP patients and healthy controls. Investigators plan to investigate the morphological characteristics of organoids, the expression of genes and proteins of the Wnt/APC/beta-catenin pathway within both ISC. Will also be studied the expression of key genes of tumor initiation (PTEN, BMPR1A, p53 and KRAS) and inflammatory parameters (cytokines and lipid mediators).
The results of this study could improve the understanding of intestine renewal. Later on, the development of new drugs could beneficiate to IBD and FAP patients.
Allocation: Non-Randomized, Intervention Model: Parallel Assignment, Masking: Open Label
Inflammatory Bowel Diseases
Not yet recruiting
University Hospital, Toulouse
Published on BioPortfolio: 2016-08-23T12:23:22-0400
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A species of Faecalbacterium, previously classified in the FUSOBACTERIUM genus, that is a major constituent of the GUT MICROBIOTA in healthy humans. It has anti-inflammatory activity and reduced numbers of this species occur in patients with INFLAMMATORY BOWEL DISEASES such as CROHN DISEASE.
Chronic, non-specific inflammation of the GASTROINTESTINAL TRACT. Etiology may be genetic or environmental. This term includes CROHN DISEASE and ULCERATIVE COLITIS.
A drug that is used in the management of inflammatory bowel diseases. Its activity is generally considered to lie in its metabolic breakdown product, 5-aminosalicylic acid (see MESALAMINE) released in the colon. (From Martindale, The Extra Pharmacopoeia, 30th ed, p907)
Surgical creation of an external opening into the ILEUM for fecal diversion or drainage. This replacement for the RECTUM is usually created in patients with severe INFLAMMATORY BOWEL DISEASES. Loop (continent) or tube (incontinent) procedures are most often employed.
A gamma-emitting radionuclide imaging agent used in the evaluation of regional cerebral blood flow and in non-invasive dynamic biodistribution studies and myocardial imaging. It has also been used to label leukocytes in the investigation of inflammatory bowel diseases.
Crohn's Disease (CD)
Crohn’s disease (CD) is a long-term condition that causes inflammation of the lining of the digestive system. Inflammation can affect any part of the digestive system, from the mouth to the back passage, but most commonly occurs in the last s...