title: Probiotics modify human intestinal mucosa-associated microbiota in patients with colorectal cancer.
abstract: Studies using animal models have demonstrated that probiotics may have a beneficial role in the prevention of colorectal cancer (CRC); however, the underlying mechanism of the beneficial effects of interventional probiotic treatment on gut microbiota has remained elusive. In the present study, pyrosequencing of the V3 region of the 16S rRNA genes was conducted in order to determine the extent to which probiotics alter the microbiota. The observations of the present study indicated that the microbial structure of cancerous tissue differed significantly from that of healthy individuals and that the CRC microbiota exhibited lower diversity. It was indicated that interventional treatment with probiotics increased the density and diversity of mucosal microbes, and altered the mucosa‑associated microbiota. Pyrosequencing demonstrated that probiotics significantly reduced (5‑fold) the abundance of a bacterial taxon assigned to the genus Fusobacterium, which had been previously suggested to be a contributing factor to increase tumorigenesis. Accordingly, interventional probiotic therapy is suggested to be able to improve the composition of the mucosal microbial flora and significantly reduce the abundance of mucosa-associated pathogens in patients with CRC.
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China.
authors.forename: Zhiguang
authors.initials: Z
authors.lastname: Gao
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China.
authors.forename: Bomin
authors.initials: B
authors.lastname: Guo
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China.
authors.forename: Renyuan
authors.initials: R
authors.lastname: Gao
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China.
authors.forename: Qingchao
authors.initials: Q
authors.lastname: Zhu
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China.
authors.forename: Wen
authors.initials: W
authors.lastname: Wu
authors.affiliation: Department of General Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China.
authors.forename: Huanlong
authors.initials: H
authors.lastname: Qin
mesh_terms: D000328:Adult; D000368:Aged; D015992:Body Mass Index; D015179:Colorectal Neoplasms / Q000382:microbiology / Q000628:therapy*; D004269:DNA, Bacterial / Q000235:genetics; D005260:Female; D000069196:Gastrointestinal Microbiome; D006801:Humans; D007413:Intestinal Mucosa / Q000382:microbiology*; D008297:Male; D008875:Middle Aged; D019936:Probiotics / Q000008:administration & dosage*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial; D012336:RNA, Ribosomal, 16S