Metagenomic analyses of the gut microbiota associated with colorectal adenoma

• Published in: PloS one Vol. 14; no. 2; p. e0212406
• Main Authors: Saito, Keisuke, Koido, Shigeo, Odamaki, Toshitaka, Kajihara, Mikio, Kato, Kumiko, Horiuchi, Sankichi, Adachi, Sei, Arakawa, Hiroshi, Yoshida, Sayumi, Akasu, Takafumi, Ito, Zensho, Uchiyama, Kan, Saruta, Masayuki, Xiao, Jin-zhong, Sato, Nobuhiro, Ohkusa, Toshifumi
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 22.02.2019; Public Library of Science (PLoS)
• Subjects: Adenoma; Adenoma - genetics; Adenoma - microbiology; Aged; Antibiotics; Bacteria - classification; Bacteria - genetics; Bacteria - isolation & purification; Biology and Life Sciences; Carcinoma; Case-Control Studies; Colon; Colonoscopy; Colorectal cancer; Colorectal carcinoma; Colorectal Neoplasms - genetics; Colorectal Neoplasms - microbiology; Deoxyribonucleic acid; Diabetes; Discriminant analysis; Disease Progression; DNA; Dysbacteriosis; Endoscopy; Female; Gastroenterology; Gastrointestinal Microbiome - genetics; Gene expression; Genes; Gram-negative bacteria; Gut microbiota; Health aspects; Hepatology; Humans; Intestinal microflora; Male; Medical schools; Medicine; Medicine and Health Sciences; Metagenomics; Microbiota; Microbiota (Symbiotic organisms); Microorganisms; Middle Aged; Pathogenesis; Pathogens; Patients; Research and Analysis Methods; Ribonucleic acid; Ribosomal RNA; RNA; RNA, Ribosomal, 16S - genetics; rRNA 16S; Sequence Analysis, DNA - methods; Statistical methods; Tumors; Japan
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0212406

Recent studies have suggested an association between certain members of the Fusobacterium genus, especially F. nucleatum, and the progression of advanced colorectal carcinoma (CRC). We assessed such an association of the gut microbiota in Japanese patients with colorectal adenoma (CRA) or intramucosal CRC using colonoscopy aspirates. We analyzed samples from 81 Japanese patients, including 47 CRA and 24 intramucosal CRC patients, and 10 healthy subjects. Metagenomic analysis of the V3-V4 region of the 16S ribosomal RNA gene was performed. The linear discriminant analysis (LDA) effect size (LEfSe) method was used to examine microbial dysbiosis, revealing significant differences in bacterial abundances between the healthy controls and CRA or intramucosal CRC patients. In particular, F. varium was statistically more abundant in patients with CRA and intramucosal CRC than in healthy subjects. Here, we present the metagenomic profile of CRA and intramucosal CRC and demonstrate that F. varium is at least partially involved in the pathogenesis of CRA and intramucosal CRC.