Comparison of the fecal microbiota profiles between ulcerative colitis and Crohn's disease using terminal restriction fragment length polymorphism analysis.
BACKGROUND
Terminal restriction fragment length polymorphism (T-RFLP) analysis is a powerful tool to assess the diversity of a microbial community. In this study, we performed T-RFLP analysis of the fecal microbiota from patients with ulcerative colitis (UC) and those with Crohn's disease (CD).


METHODS
Thirty-one patients with UC, 31 patients with CD, and 30 healthy individuals were enrolled. The polymerase chain reaction (PCR) products obtained from the 16S rRNA genes of fecal samples were digested with BslI, and T-RF lengths were determined.


RESULTS
The fecal microbial communities were classified into 5 clusters. Twenty-eight of the 30 healthy individuals and 17 of the 18 patients with inactive UC were classified into clusters I, II, and III, but these clusters included a small number of patients with active UC and inactive/active CD. In contrast, 8 of the 13 patients with active UC and the majority of CD patients (12 of the 16 patients with inactive CD, and 11 of the 15 patients with active CD) were included in clusters IV and V. Based on the BslI-digested T-RFLP database, the bacteria showed a significant decrease in the Clostridium family in patients with active UC and inactive/active CD. In contrast, Bacteroides were significantly increased in CD patients. No significant differences were observed between patients with active UC and those with active CD.


CONCLUSIONS
The fecal microbial communities of IBD patients were different from those of healthy individuals. The gut microbiota of patients with inactive UC tended to be closer to that of healthy individuals, suggesting different roles for the fecal microbiota in the pathophysiology of UC and CD.
Division of Mucosal Immunology, Graduate School of Medicine, Shiga University of Medical Science, Seta Tsukinowa, Otsu 520-2192, Japan. andoh@belle.shiga-med.ac.jp
Akira
A
Andoh
Hirotsugu
H
Imaeda
Tomoki
T
Aomatsu
Osamu
O
Inatomi
Shigeki
S
Bamba
Masaya
M
Sasaki
Yasuharu
Y
Saito
Tomoyuki
T
Tsujikawa
Yoshihide
Y
Fujiyama
D000328:Adult; D001439:Bacteroides / Q000235:genetics / Q000302:isolation & purification; D016022:Case-Control Studies; D003013:Clostridium / Q000235:genetics / Q000302:isolation & purification; D003093:Colitis, Ulcerative / Q000382:microbiology*; D003424:Crohn Disease / Q000382:microbiology*; D005243:Feces / Q000382:microbiology*; D005260:Female; D006801:Humans; D008297:Male; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D012336:RNA, Ribosomal, 16S
D012336:RNA, Ribosomal, 16S
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