Epithelial-mesenchymal transition induced by senescent fibroblasts.
Level 5 - mechanism / opinion, no new human data
Narrative review summarizing mechanistic biology with no new human empirical data.
PubMed 21706180 · doi:10.1007/s12307-011-0069-4
What was done
This narrative review synthesizes mechanistic literature examining how the senescence-associated secretory phenotype (SASP) of senescent fibroblasts, particularly through interleukin signaling, modifies the tissue microenvironment to drive epithelial-mesenchymal transitions (EMTs) and tumor progression in epithelial cells.
What was found
The abstract provides a conceptual overview without empirical data or quantitative metrics. It reports the dual role of cellular senescence: while permanent cell cycle arrest acts as a cell-autonomous tumor suppressor, senescent fibroblasts concurrently acquire a pro-inflammatory SASP that alters the local microenvironment, reactivates developmental EMT programs in neighboring epithelial cells, and facilitates invasion and metastasis.
Why it matters
It outlines the paradoxical, non-cell-autonomous mechanism through which senescent cells and aging tissue microenvironments can inadvertently accelerate malignancy and metastatic dissemination.
Limits
The paper is a non-systematic narrative review rather than a primary clinical or experimental study. The abstract reports no quantitative measurements, statistical comparisons, sample sizes, or direct human patient validation data.
Cited by
- supports Cytokines secreted by senescent cells induce an epithelial-to-mesenchymal transition in neighboring epithelial cells, leading to loss of tissue function.