Cancer spreads by reshaping a living tumour ecosystem
How does cancer spread through the body? New research maps for the first time how tumours reshape their surroundings as they metastasise. The findings challenge existing assumptions about how this process works.
When cancer cells spread to other organs (metastasis), they do not simply survive somewhere new. They build an entirely new ecosystem. They send signals, recruit normal cells and reorganise the local environment to suit their needs. But how that ecosystem develops over time had remained largely unknown.
Multiple techniques, one picture
The study, published in Science, combined several measurement methods simultaneously (spatial multi-omics). This allowed the researchers to capture gene activity, protein composition and cell location within the tumour, and to do so not at a single point in time but across multiple stages of metastatic colonisation.
What they observed: the tumour ecosystem is constantly changing. Early-arriving cancer cells behave differently from cells that have been established in the new organ for longer. Surrounding normal cells adapt alongside them. The immune system responds but is gradually pushed back. That shifting dynamic makes it difficult for the immune system to keep pace with the tumour.
Clues for better treatment
For cancer treatment, these insights matter. Many therapies target cancer cells directly. But if the surrounding ecosystem co-evolves, treatments that work early may fail later. Knowing that timeline creates opportunities to intervene when the ecosystem is still vulnerable.
There is also a connection to ageing. Even before any cancer cell is present, ageing tissue already has a different immune landscape than younger tissue. Chronic low-grade inflammation (inflammaging) makes tissues more susceptible to colonisation by cancer cells. This research provides a more precise view of how that process unfolds at the cellular and molecular level.
The researchers emphasise that this is still fundamental research. Translating these findings into new treatments will take time. But the detailed picture of tumour dynamics during metastasis they have produced should serve as a valuable foundation for future therapeutic work.
Search terms to explore further: spatial multi-omics tumour metastasis, tumour microenvironment ecosystem, inflammaging cancer colonisation