title: [Differences between colorectal cancer patients and healthy people in fecal microbiota and metabolites].
abstract: OBJECTIVE
  To compare fecal microbiota and metabolites between colorectal cancer (CRC) patients and healthy population.
  
  
  METHODS
  Feces from fifteen CRC patients and twelve normal people were analyzed by using pyrosequencing and gas chromatography mass spectrometry(GC/MS).
  
  
  RESULTS
  There were no significant differences in the overall microbial community structure associated with the disease state, but 18 bacterial genera were underrepresented or overrepresented in the CRC samples. GC-MS profiling revealed higher concentrations for 9 kinds of amino acids and metabolites of short-chain fatty acids, lower concentrations for 3 kinds of unsaturated fatty acids and 2 kinds of glycerin and ursodeoxycholic acid in stool samples from CRC patients. Correlative analysis between the combined datasets revealed some potential relationships between stool metabolites and certain bacterial species.
  
  
  CONCLUSIONS
  There are significant differences in fecal metabolites and the relative abundance of certain types of bacteria between CRC patients and healthy people, which can provide insight into microbial functions occurring in a cancer environment and will help direct future mechanism studies.
authors.affiliation: Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen Universtiy, Guangzhou 510655, China; Department of Gastroenterology, The Third Affiliated Hospital of Nanchang University, Nanchang 330006, China. wjp@mail.sysu.edu.cn; raobenqiang@sina.cn.
authors.forename: Xiaoxue
authors.initials: X
authors.lastname: Wang
authors.forename: Jianping
authors.initials: J
authors.lastname: Wang
authors.forename: Benqiang
authors.initials: B
authors.lastname: Rao
authors.forename: Li
authors.initials: L
authors.lastname: Deng
authors.forename: Yuan
authors.initials: Y
authors.lastname: Huang
authors.forename: Guangzheng
authors.initials: G
authors.lastname: Zeng
authors.forename: Cheng
authors.initials: C
authors.lastname: Chen
mesh_terms: D016022:Case-Control Studies; D003110:Colonic Neoplasms; D015179:Colorectal Neoplasms / Q000382:microbiology*; D005232:Fatty Acids, Volatile; D005243:Feces / Q000382:microbiology*; D006801:Humans; D064307:Microbiota
chemical_list: D005232:Fatty Acids, Volatile