The Study
Abstract 2796: Colibactin mutation signatures are associated with younger age of onset in colorectal cancer
This study found that kids and young adults with a certain kind of DNA damage in their colon cancer were more likely to get sick younger than older people. But it doesn't prove the bacteria caused the damage — maybe the cancer made the environment better for the bacteria, or something else caused both.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Some E. coli bacteria in the gut make a poison called colibactin that damages DNA in colon cells, leaving a unique fingerprint of mutations.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 544 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — getting colon cancer 4 years earlier on average could mean more aggressive disease and less time for early detection.
- 2150 out of 1,884 colon cancer patients had this fingerprint; those patients were diagnosed at age 55 on average, compared to age 59 for others.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Cancer Research
Year
2024
Authors
Stefanie Gerstberger, M. Lumish, S. Hartner, Farheen Shah, Seongmin Choi, A. Luthra, Qingwen Jiang, H. J. Woo, Ahmed Mahmoud, H. Walch, Simran Asawa, M. Donoghue, A. Cercek, R. Yaeger, Andrew Mcpherson, F. Sánchez-Vega, K. Ganesh
Related Content
Claims (6)
When human colon tissue grown in the lab is exposed to a specific type of E. coli that produces colibactin for three months, it develops a unique pattern of DNA damage that matches the pattern seen in human colorectal cancers.
Colorectal cancers with colibactin-related DNA damage patterns show the same levels of overall mutations and known cancer-causing gene changes as other colorectal cancers, suggesting colibactin causes cancer through a different biological mechanism.
Certain strains of E. coli that produce a toxin called colibactin are linked to a specific pattern of DNA damage found in colorectal tumors. This DNA damage pattern is more commonly found in tumors from people diagnosed with colorectal cancer before age 55 compared to those diagnosed at age 59 or older.
A specific pattern of DNA damage caused by a bacterial toxin can be identified in tumor samples using a targeted DNA sequencing test called MSK-IMPACT, without needing to sequence the entire genome.
Certain strains of Escherichia coli that produce colibactin cause distinct double-strand breaks in the DNA of cells lining the colon, leading to characteristic mutation patterns known as SBS88 and ID18.
Colorectal cancers with a specific DNA damage pattern linked to colibactin-producing bacteria show more widespread changes in their genome compared to cancers without this pattern.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.