A novel faecal Lachnoclostridium marker for the non-invasive diagnosis of colorectal adenoma and cancer
| Autor: | Tong Li, Ying-Xuan Chen, Siew C. Ng, Jing-Yuan Fang, Francis K.L. Chan, Joseph J.Y. Sung, Jessie Qiaoyi Liang, Eagle S. H. Chu, Geicho Nakatsu, Sunny H. Wong, Chun Ho Szeto, Jun Yu, Tung On Yau |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Clostridium hathewayi
medicine.medical_specialty biology Adenoma business.industry Colorectal cancer Gastroenterology Cancer Colorectal adenoma medicine.disease biology.organism_classification Real-time polymerase chain reaction Metagenomics Internal medicine medicine Fusobacterium nucleatum business |
| Zdroj: | Gut. 69:1248-1257 |
| ISSN: | 1468-3288 0017-5749 |
| DOI: | 10.1136/gutjnl-2019-318532 |
| Popis: | ObjectiveThere is a need for early detection of colorectal cancer (CRC) at precancerous-stage adenoma. Here, we identified novel faecal bacterial markers for diagnosing adenoma.DesignThis study included 1012 subjects (274 CRC, 353 adenoma and 385 controls) from two independent Asian groups. Candidate markers were identified by metagenomics and validated by targeted quantitative PCR.ResultsMetagenomic analysis identified ‘m3’ from a Lachnoclostridium sp., Fusobacterium nucleatum (Fn) and Clostridium hathewayi (Ch) to be significantly enriched in adenoma. Faecal m3 and Fn were significantly increased from normal to adenoma to CRC (pm3 may perform better than Fn in distinguishing adenoma from controls (areas under the receiver operating characteristic curve (AUROCs) m3=0.675 vs Fn=0.620, p=0.09), while Fn performed better in diagnosing CRC (AUROCs Fn=0.862 vs m3=0.741, pm3 and Fn showed sensitivities of 48.3% and 33.8% for adenoma, and 62.1% and 77.8% for CRC, respectively. In a subgroup tested with faecal immunochemical test (FIT; n=642), m3 performed better than FIT in detecting adenoma (sensitivities for non-advanced and advanced adenomas of 44.2% and 50.8% by m3 (specificity=79.6%) vs 0% and 16.1% by FIT (specificity=98.5%)). Combining with FIT improved sensitivity of m3 for advanced adenoma to 56.8%. The combination of m3 with Fn, Ch, Bacteroides clarus and FIT performed best for diagnosing CRC (specificity=81.2% and sensitivity=93.8%).ConclusionThis study identifies a novel bacterial marker m3 for the non-invasive diagnosis of colorectal adenoma. |
| Databáze: | OpenAIRE |
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