PLoS ONE (Jan 2019)

Metagenomic analyses of the gut microbiota associated with colorectal adenoma.

  • Keisuke Saito,
  • Shigeo Koido,
  • Toshitaka Odamaki,
  • Mikio Kajihara,
  • Kumiko Kato,
  • Sankichi Horiuchi,
  • Sei Adachi,
  • Hiroshi Arakawa,
  • Sayumi Yoshida,
  • Takafumi Akasu,
  • Zensho Ito,
  • Kan Uchiyama,
  • Masayuki Saruta,
  • Jin-Zhong Xiao,
  • Nobuhiro Sato,
  • Toshifumi Ohkusa

DOI
https://doi.org/10.1371/journal.pone.0212406
Journal volume & issue
Vol. 14, no. 2
p. e0212406

Abstract

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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.