Abstract | BACKGROUND: METHODS: We compared the presence of the bft gene in mucosal samples from colorectal neoplasia patients (cases, n = 49) to a control group undergoing outpatient colonoscopy for CRC screening or diagnostic workup (controls, n = 49). Single bacterial colonies isolated anaerobically from mucosal colon tissue were tested for the bft gene with touch-down polymerase chain reaction. RESULTS: The mucosa of cases was significantly more often bft-positive on left (85.7%) and right (91.7%) tumor and/or paired normal tissues compared with left and right control biopsies (53.1%; P = .033 and 55.5%; P = .04, respectively). Detection of bft was concordant in most paired mucosal samples from individual cases or controls (75% cases; 67% controls). There was a trend toward increased bft positivity in mucosa from late- vs early-stage CRC patients (100% vs 72.7%, respectively; P = .093). In contrast to ETBF diarrheal disease where bft-1 detection dominates, bft-2 was the most frequent toxin isotype identified in both cases and controls, whereas multiple bft isotypes were detected more frequently in cases (P ≤ .02). CONCLUSIONS: The bft gene is associated with colorectal neoplasia, especially in late-stage CRC. Our results suggest that mucosal bft exposure is common and may be a risk factor for developing CRC.
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Authors | Annemarie Boleij, Elizabeth M Hechenbleikner, Andrew C Goodwin, Ruchi Badani, Ellen M Stein, Mark G Lazarev, Brandon Ellis, Karen C Carroll, Emilia Albesiano, Elizabeth C Wick, Elizabeth A Platz, Drew M Pardoll, Cynthia L Sears |
Journal | Clinical infectious diseases : an official publication of the Infectious Diseases Society of America
(Clin Infect Dis)
Vol. 60
Issue 2
Pg. 208-15
(Jan 15 2015)
ISSN: 1537-6591 [Electronic] United States |
PMID | 25305284
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Copyright | © The Author 2014. Published by Oxford University Press on behalf of the Infectious Diseases Society of America. All rights reserved. For Permissions, please e-mail: [email protected]. |
Chemical References |
- Bacterial Toxins
- DNA, Bacterial
- Bacteroides fragilis toxin
- Metalloendopeptidases
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Topics |
- Aged
- Bacterial Toxins
(genetics)
- Bacteroides fragilis
(genetics)
- Colon
(microbiology, pathology)
- Colorectal Neoplasms
(epidemiology, microbiology, pathology)
- DNA, Bacterial
(analysis, genetics)
- Female
- Genes, Bacterial
- Humans
- Intestinal Mucosa
(microbiology, pathology)
- Male
- Metalloendopeptidases
(genetics)
- Middle Aged
- Risk Factors
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