Abstract:
:Cell competition promotes the elimination of weaker cells from a growing population. Here we investigate how cells of Drosophila wing imaginal discs distinguish "winners" from "losers" during cell competition. Using genomic and functional assays, we have identified several factors implicated in the process, including Flower (Fwe), a cell membrane protein conserved in multicellular animals. Our results suggest that Fwe is a component of the cell competition response that is required and sufficient to label cells as "winners" or "losers." In Drosophila, the fwe locus produces three isoforms, fwe(ubi), fwe(Lose-A), and fwe(Lose-B). Basal levels of fwe(ubi) are constantly produced. During competition, the fwe(Lose) isoforms are upregulated in prospective loser cells. Cell-cell comparison of relative fwe(Lose) and fwe(ubi) levels ultimately determines which cell undergoes apoptosis. This "extracellular code" may constitute an ancient mechanism to terminate competitive conflicts among cells.
journal_name
Dev Celljournal_title
Developmental cellauthors
Rhiner C,López-Gay JM,Soldini D,Casas-Tinto S,Martín FA,Lombardía L,Moreno Edoi
10.1016/j.devcel.2010.05.010subject
Has Abstractpub_date
2010-06-15 00:00:00pages
985-98issue
6eissn
1534-5807issn
1878-1551pii
S1534-5807(10)00218-2journal_volume
18pub_type
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