Is Local Injection of Mesenchymal Stem Cells After Endoscopic Dilation Safe and Does it Improve the Outcome of Intestinal Stricture in Patients With Crohn's Disease?
This is an exploratory phase II study, to evaluate the impact of these Mesenchymal Stem Cells (MSCs) on strictures in Crohn's disease patients with symptomatic intestinal stricture eligible to endoscopic dilatation. The impact of combined treatment by endoscopic dilation and local injection of MSCs will be compared with that of a control group.
• Patient aged ≥ 18 years with Crohn's Disease diagnosed more than 6 months ago
• Background treatment, for Crohn's Disease, stable for 4 months
• Presence of stricture (whether de novo or anastomotic), meeting the radiological definition of stenosis, i.e. a combination of the following criteria: (1) localized luminal narrowing (reduction of luminal diameter by at least less than 50% compared to adjacent healthy bowel segment), (2) bowel wall thickening (25% increase in wall thickness compared to adjacent unaffected bowel) and pre-stenotic dilation (luminal diameter greater than 3 cm)
• Presence of symptomatic stricture with abdominal pain after meals and limitations on the amount or type of food at screening
• Presence of a stenosis accessible by ileo-colonoscopy, not passable (i.e. not allowing the passage of the adult ileo-colonoscope), of a length less than 5 cm, eligible for endoscopic dilation
• Patient accepting the study protocol and having signed an informed consent
• Patient capable of undergoing entero-MRI