Cancer Cells and Metastasis

Metastasis — the spread of cancer cells from a primary tumor to distant organs — accounts for the vast majority of cancer-related deaths, yet the cellular and molecular mechanisms that allow individual cells to leave, survive in transit, and colonize new tissue remain incompletely understood. A leading hypothesis centers on cancer stem cells, a subpopulation of tumorigenic cells capable of self-renewal and differentiation, which appear to drive both tumor progression and resistance to standard therapies through dynamic interactions with the surrounding microenvironment. A key process under investigation is epithelial-mesenchymal transition, in which cancer cells acquire a more mobile, stem-like state that facilitates invasion — though how cells then revert to seed and grow at distant sites is still an active area of debate. Researchers are working to clarify how the niche environments of secondary organs regulate metastatic colonization, and whether disrupting cancer stem cell plasticity or their microenvironmental signals can overcome the drug resistance that makes metastatic disease so difficult to treat.

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Keywords

Cancer Stem CellsTumor MetastasisEpithelial-Mesenchymal TransitionStem Cell NichesTumorigenic CellsMetastatic Colonization