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2017 ; 66
(8
): 1441-1448
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Quantitation of faecal Fusobacterium improves faecal immunochemical test in
detecting advanced colorectal neoplasia
#MMPMID27797940
Wong SH
; Kwong TNY
; Chow TC
; Luk AKC
; Dai RZW
; Nakatsu G
; Lam TYT
; Zhang L
; Wu JCY
; Chan FKL
; Ng SSM
; Wong MCS
; Ng SC
; Wu WKK
; Yu J
; Sung JJY
Gut
2017[Aug]; 66
(8
): 1441-1448
PMID27797940
show ga
OBJECTIVE: There is a need for an improved biomarker for colorectal cancer (CRC)
and advanced adenoma. We evaluated faecal microbial markers for clinical use in
detecting CRC and advanced adenoma. DESIGN: We measured relative abundance of
Fusobacterium nucleatum (Fn), Peptostreptococcus anaerobius (Pa) and Parvimonas
micra (Pm) by quantitative PCR in 309 subjects, including 104 patients with CRC,
103 patients with advanced adenoma and 102 controls. We evaluated the diagnostic
performance of these biomarkers with respect to faecal immunochemical test (FIT),
and validated the results in an independent cohort of 181 subjects. RESULTS: The
abundance was higher for all three individual markers in patients with CRC than
controls (p<0.001), and for marker Fn in patients with advanced adenoma than
controls (p=0.022). The marker Fn, when combined with FIT, showed superior
sensitivity (92.3% vs 73.1%, p<0.001) and area under the receiver-operating
characteristic curve (AUC) (0.95 vs 0.86, p<0.001) than stand-alone FIT in
detecting CRC in the same patient cohort. This combined test also increased the
sensitivity (38.6% vs 15.5%, p<0.001) and AUC (0.65 vs 0.57, p=0.007) for
detecting advanced adenoma. The performance gain for both CRC and advanced
adenoma was confirmed in the validation cohort (p=0.0014 and p=0.031,
respectively). CONCLUSIONS: This study identified marker Fn as a valuable marker
to improve diagnostic performance of FIT, providing a complementary role to
detect lesions missed by FIT alone. This simple approach may improve the clinical
utility of the current FIT, and takes one step further towards a non-invasive,
potentially more accurate and affordable diagnosis of advanced colorectal
neoplasia.