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What 2,023 whole genomes reveal about bowel cancer
Digested from Nature 2024 · DOI 10.1038/s41586-024-07747-9 (via PubMed, CC BY 4.0)
The UK's 100,000 Genomes Project sequenced the entire genome of more than 2,000 bowel cancers — the most detailed genetic picture of this common cancer so far. Reading the whole genome, rather than a handful of known genes, changed the map.
What they found:
- 250+ genes involved in bowel cancer, many never linked to it before.
- Four new subgroups of the common type, each predicting outcomes differently.
- Signals pointing to diet and smoking — and a gut-bacterium toxin tied to rectal cancers.
- Many changes are “actionable” — a targeted drug may work against them.
Why it matters: it's the clearest sign yet that whole-genome sequencing adds real value over today's targeted tests — better prognosis, more treatment options, and clues to what causes the disease. (It's a landscape study, not a trial: “actionable” means promising, not proven.)