The Claim
The presence of colibactin-induced mutational signatures SBS88 and ID18 in colorectal tumors is not associated with the current detection of colibactin-producing bacteria in the microbiome, indicating that bacterial exposure likely occurred prior to tumor diagnosis and the bacteria are no longer present.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Colorectal tumors with specific DNA damage patterns caused by colibactin often do not contain the bacteria that produce it at the time of diagnosis, suggesting the bacteria were present earlier and have since been cleared.
See the scientific wording
The presence of colibactin-induced mutational signatures SBS88 and ID18 in colorectal tumors is not associated with the presence of colibactin-producing bacteria in the current microbiome, suggesting that exposure occurred in the past and the bacteria may no longer be present at the time of tumor diagnosis.
What the research says
1 studyStudy: Geographic and age variations in mutational processes in colorectal cancer
The study found that certain DNA damage patterns in colon tumors are more common in younger patients, meaning the harmful bacteria likely infected them when they were kids, even if the bacteria aren't there anymore when the tumor is found.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.