A self-limiting switch based on translational control regulates the transition from proliferation to differentiation in an adult stem cell lineage.

ABSTRACT: In adult stem cell lineages, progenitor cells commonly undergo mitotic transit amplifying (TA) divisions before terminal differentiation, allowing production of many differentiated progeny per stem cell division. Mechanisms that limit TA divisions and trigger the switch to differentiation may protect against cancer by preventing accumulation of oncogenic mutations in the proliferating population. Here we show that the switch from TA proliferation to differentiation in the Drosophila male germline stem cell lineage is mediated by translational control. The TRIM-NHL tumor suppressor homolog Mei-P26 facilitates accumulation of the differentiation regulator Bam in TA cells. In turn, Bam and its partner Bgcn bind the mei-P26 3' untranslated region and repress translation of mei-P26 in late TA c

SUBMITTER: Insco ML 

PROVIDER: S-EPMC3833810 | biostudies-literature | 2012 Nov

REPOSITORIES: biostudies-literature