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. 2022 Jul 18;13:4157. doi: 10.1038/s41467-022-31642-4

Fig. 6. A model of cell competition in young and aged tissues.

Fig. 6

In normal tissues, RasV12-transformed cells are removed via apical extrusion from epithelial layers. However, senescent cells accumulate in various tissues with aging or consumption of a high-fat diet. Consequently, HGF secreted from senescent stromal cells suppresses apical extrusion and promotes basal protrusion of RasV12-transformed cells, leading to abnormal cell proliferation in epithelial layers and infiltration to basal layers. Therefore, the decline of cell competition might be etiologically associated with the development of cancer in aged tissues.