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Colonisation by Faecalibacterium prausnitzii and maintenance of clinical remission in patients with ulcerative colitis.
- Source :
-
Alimentary pharmacology & therapeutics [Aliment Pharmacol Ther] 2013 Jul; Vol. 38 (2), pp. 151-61. Date of Electronic Publication: 2013 Jun 03. - Publication Year :
- 2013
-
Abstract
- Background: Although incrimination of the intestinal microbiota in the pathogenesis of IBD is widely accepted, few data are available about the role of specific bacteria. Potentially, Faecalibacterium prausnitzii, bacteria with anti-inflammatory properties, might be deficient in ulcerative colitis (UC).<br />Aim: To quantify F. prausnitzii in the faecal microbiota of UC patients in remission and determine its relationship with relapse.<br />Methods: A cross-sectional study included 116 UC patients in remission, 29 first-degree relatives and 31 healthy controls. A subset of eighteen patients, recruited during the first month of remission, underwent a 1-year follow-up. Total bacteria and F. prausnitzii were measured by quantitative Real Time PCR (qPCR, copies/g). Calprotectin was determined as inflammatory index (μg/g).<br />Results: We found that F. prausnitzii was reduced in patients (median, IQR: 1.4 × 10⁸ , 5.1 × 10⁷-4.5 × 10⁸) and relatives (1.7 × 10⁸, 9.3 × 10⁷-5.1 × 10⁸) vs. controls (6.5 × 10⁸, 3.7 × 10⁸-1.6 × 10⁹, P < 0.0001). Moreover, low counts of F. prausnitzii were associated with less than 12 months of remission (8.0 × 10⁷, 2.0 × 10⁷-3.5 × 10⁸ vs. 2.1 × 10⁸, 1.0 × 10⁸-7.9 × 10⁸, P < 0.001) and more than 1 relapse/year (8.0 × 10⁷, 3.2 × 10⁷-3.8 × 10⁸ vs. 1.9 × 10⁸, 6.8 × 10⁷-6.0 × 10⁸, P < 0.01). When patients were followed up, F. prausnitzii increased steadily until reaching similar levels to those of controls if remission persisted (2.9 × 10⁸, 9.3 × 10⁶-1.2 × 10⁹; calprotectin: 76, 19-212), whereas it remained low if patients relapsed (2.2 × 10⁸, 1.4 × 10⁶-3.3 × 10⁸; calprotectin: 1760, 844-3662 P < 0.05 vs. controls).<br />Conclusions: Defective gut colonisation by F. prausnitzii occurred in UC patients during remission and in their unaffected relatives. The recovery of the F. prausnitzii population after relapse is associated with maintenance of clinical remission.<br /> (© 2013 John Wiley & Sons Ltd.)
- Subjects :
- Adult
Cross-Sectional Studies
Female
Humans
Male
Middle Aged
Pedigree
Real-Time Polymerase Chain Reaction
Recurrence
Young Adult
Colitis, Ulcerative microbiology
Feces microbiology
Gram-Positive Bacteria isolation & purification
Gram-Positive Bacterial Infections microbiology
Leukocyte L1 Antigen Complex metabolism
Ruminococcus isolation & purification
Subjects
Details
- Language :
- English
- ISSN :
- 1365-2036
- Volume :
- 38
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Alimentary pharmacology & therapeutics
- Publication Type :
- Academic Journal
- Accession number :
- 23725320
- Full Text :
- https://doi.org/10.1111/apt.12365