Bacterial community diversity in cultures derived from healthy and inflamed ileal pouches after restorative proctocolectomy
| Autor: | Andrew K. Lilley, Geraint B. Rogers, Alastair Forbes, R. John Nicholls, Kenneth D. Bruce, Axel von Herbay, Matthew W. Johnson, Paul J. Ciclitira |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Adult
Male medicine.medical_specialty medicine.medical_treatment Colonic Pouches Ileum Pouchitis Inflammatory bowel disease Gastroenterology Internal medicine Humans Immunology and Allergy Medicine Colitis Bacteria business.industry Proctocolectomy Proctocolectomy Restorative Middle Aged medicine.disease Ulcerative colitis medicine.anatomical_structure Adenomatous Polyposis Coli Ileal Pouches Colitis Ulcerative Female business Dysbiosis |
| Zdroj: | Inflammatory Bowel Diseases. 15:1803-1811 |
| ISSN: | 1078-0998 |
| DOI: | 10.1002/ibd.21022 |
| Popis: | Pouchitis is believed to occur as a reaction to dysbiosis. In this study we assessed differences between mucosal bacterial communities cultured from noninflamed and inflamed ileal pouches.Thirty-two ileal pouch patients, 22 with ulcerative colitis (UC) and 10 with familial adenomatous polyposis (FAP), underwent symptomatic, endoscopic, and histological assessment. The Objective Pouchitis Score (OPS) and the Pouch Disease Activity Index (PDAI) were used to diagnose pouchitis. Seven UC patients had pouchitis (UC+), 15 had a noninflamed pouch (UC-), 9 had a noninflamed pouch (FAP-), and 1 FAP patient had pouchitis (FAP+). Biopsies taken from the ileal mucosa of the pouch were cultured under aerobic and anaerobic conditions. Following standardized DNA extraction a polymerase chain reaction (PCR) was performed to generate 16S rRNA gene products. A "fingerprint" of the bacterial community within each sample was created using terminal-restriction fragment length polymorphism (T-RFLP) profiling. Species richness and evenness were determined using T-RF band lengths and relative band intensities.From the 64 DNA samples, 834 bands were detected, of which 179 represented different species (operational taxonomic units [OTUs]). The average species richness for the FAP-, FAP+, UC-, and UC+ groups was 26, 35, 23.9, and 29.6 per patient, with the average species diversity within the groups of 10.6, 29, 8.3, and 11.4, respectively. Similar trends were observed when the anaerobic and aerobic-derived bacterial groups were analyzed separately.No significant differences were found between the bacterial cultures derived from any of the clinical groups or between pouchitis and nonpouchitis patients. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text