Fecal Microbiota Transplantation for the Treatment of Chronic Pouchitis

Background:

The surgical treatment of choice for the treatment of medically refractory ulcerative colitis (UC) is restorative ileal pouch-anal anastomosis (IPAA), in which the patient retains fecal continence following colonectomy, by subsequent anastomosis of the terminal ileum and the rectum.

Up to 25% of patients with UC will undergo IPAA surgery. The most common complication following the procedure is inflammation of the pouch (pouchitis), which is seen in up to 50% of patients within the first five years of surgery. Of these patients, 10-20% will develop a chronic inflammatory condition. The clinical symptoms of pouchitis include diarrhea, rectal bleeding, stomach cramps, general malaise and reduced quality of life. Endoscopic findings include mucosal edema, granulations, and ulcerations with mucosal frailty. In most cases, a causative microorganism is not identified, although infection with Clostridium difficile or Cytomegalovirus (CMV) have been reported.

The most common treatment of pouchitis is empiric antibiotics, usually quinolones and metronidazole, or a combination of both. Following complications, removal of the pouch can become a last resort, and chronic pouchitis is the leading indication for 10% of these operations.

The composition of microbes in the gut is known to be a key factor in the homeostasis of the intestine, and plays a central role in the development of CIBD. Different single microorganisms have previously been suggested as playing an important role in this development, including: Mycobacterium avium, Escherichia coli and Clostridium difficile, that all have invasive capabilities. Several studies have investigated the connection between the composition of microbes in the gut and development of pouchitis finding an increasing evidence for a link between dysbiosis and pouchitis.