Abstract

In multicellular organisms, incidentally emerging suboptimal cells are removed to maintain homeostasis of tissues. The unfavorable cells are excluded by a process termed cell competition whereby the resident normal cells actively eliminate the unfit cells of the identical lineage. Although the phenomenon of cell competition was originally discovered in Drosophila, a number of recent studies have provided implications of cell competition in tissue regeneration, development and oncogenesis in mammals. Here the roles of cell competition in fly to mammals are discussed.

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