Peer-Reviewed Journal Details
Mandatory Fields
Scanlan, PD;Shanahan, F;Marchesi, JR
2009
August
Fems Microbiology Ecology
Culture-independent analysis of desulfovibrios in the human distal colon of healthy, colorectal cancer and polypectomized individuals
Validated
WOS: 88 ()
Optional Fields
SULFATE-REDUCING BACTERIA INFLAMMATORY BOWEL DISEASES HYDROGEN-SULFIDE PRODUCTION BILOPHILA-WADSWORTHIA ULCERATIVE-COLITIS HUMAN GUT GASTROINTESTINAL-TRACT OLIGONUCLEOTIDE PROBE FECAL MICROBIOTA GENE-EXPRESSION
69
213
221
The production of hydrogen sulphide, an end product of metabolism by the sulphate-reducing bacteria (SRB) has been cited as a potential aetiological agent in gastrointestinal disease. Quantitative PCR (Q-PCR) assays to enumerate desulfovibrios from two gastrointestinal disease groups: colorectal cancer (CRC) n=27 and polypectomized individuals (PP) n=27, and two healthy control groups, elderly (H1) n=8 and young adults (H2) n=30 was performed. Analysis of Desulfovibrio sp. diversity using the dissimilarity sulphite reductase (dsrAB) gene as a molecular marker was also undertaken. Q-PCR detected Desulfovibrio sp. in all samples and no significant difference was observed for PP, H1, H2 with gene copy numbers of Desulfovibrio sp. averaging at 10(6) g(-1) of faeces. Significantly reduced numbers of Desulfovibrio sp. were observed for CRC (10(5) g(-1)) compared with both PP and H2 groups (P < 0.05). Diversity analysis indicated that a low Desulfovibrio sp. diversity and the predominance of Desulfovibrio piger was a feature of both healthy and disease groups. In addition, a dsrAB gene sequence distantly related to a Gram-positive SRB was also recovered, highlighting the importance of cultivation-independent techniques for furthering our understanding of the diversity of the human gastrointestinal ecosystem.
MALDEN
0168-6496
10.1111/j.1574-6941.2009.00709.x
Grant Details