title: Characterization of gut microbiota profiles by disease activity in patients with Crohn's disease using data mining analysis of terminal restriction fragment length polymorphisms.
abstract: The gut microbiota plays a significant role in the pathogenesis of Crohn's disease (CD). In this study, we analyzed the disease activity and associated fecal microbiota profiles in 160 CD patients and 121 healthy individuals. Fecal samples from the CD patients were collected during three different clinical phases, the active (n=66), remission-achieved (n=51) and remission-maintained (n=43) phases. Terminal restriction fragment length polymorphism (T-RFLP) and data mining analysis using the Classification and Regression Tree (C&RT) approach were performed. Data mining provided a decision tree that clearly identified the various subject groups (nodes). The majority of the healthy individuals were divided into Node-5 and Node-8. Healthy subjects comprised 99% of Node-5 (91 of 92) and 84% of Node-8 (21 of 25 subjects). Node-3 was characterized by CD (136 of 160 CD subjects) and was divided into Node-6 and Node-7. Node-6 (n=103) was characterized by subjects in the active phase (n=48; 46%) and remission-achieved phase (n=39; 38%) and Node-7 was characterized by the remission-maintained phase (21 of 37 subjects; 57%). Finally, Node-6 was divided into Node-9 and Node-10. Node-9 (n=78) was characterized by subjects in the active phase (n=43; 55%) and Node-10 (n=25) was characterized by subjects in the remission-maintained phase (n=16; 64%). Differences in the gut microbiota associated with disease activity of CD patients were identified. Thus, data mining analysis appears to be an ideal tool for the characterization of the gut microbiota in inflammatory bowel disease.
authors.affiliation: Division of Mucosal Immunology, Graduate School of Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Andoh
authors.affiliation: Miyagi University, Sendai, Miyagi 982-0215, Japan.
authors.forename: Toshio
authors.initials: T
authors.lastname: Kobayashi
authors.affiliation: Research and Development Laboratories, EN Otsuka Pharmaceutical Co., Ltd., Hanamaki, Iwate 025-0312, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kuzuoka
authors.affiliation: Department of Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Tsujikawa
authors.affiliation: Department of Internal Medicine, Sakura Medical Center, Toho University, Sakura, Chiba 285-8741, Japan.
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Suzuki
authors.affiliation: Department of Gastroenterology, Chikushi Hospital, Fukuoka University, Chikushino, Fukuoka 814-0180, Japan.
authors.forename: Fumihito
authors.initials: F
authors.lastname: Hirai
authors.affiliation: Department of Gastroenterology, Chikushi Hospital, Fukuoka University, Chikushino, Fukuoka 814-0180, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Matsui
authors.affiliation: Division of Lower Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8131, Japan.
authors.forename: Shiro
authors.initials: S
authors.lastname: Nakamura
authors.affiliation: Division of Lower Gastroenterology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8131, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Matsumoto
authors.affiliation: Department of Medicine, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan.
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Fujiyama
keywords: data mining; inflammatory bowel disease; microbiota; terminal restriction fragment length polymorphism
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