RRC ID 11669
著者 Leatherman JL, Dinardo S.
タイトル Germline self-renewal requires cyst stem cells and stat regulates niche adhesion in Drosophila testes.
ジャーナル Nat Cell Biol
Abstract Adults maintain tissue-specific stem cells through niche signals. A model for niche function is the Drosophila melanogaster testis, where a small cluster of cells called the hub produce locally available signals that allow only adjacent cells to self-renew. We show here that the principal signalling pathway implicated in this niche, chemokine activation of STAT, does not primarily regulate self-renewal of germline stem cells (GSCs), but rather governs GSC adhesion to hub cells. In fact, GSC renewal does not require hub cell contact, as GSCs can be renewed solely by contact with the second resident stem cell population, somatic cyst stem cells (CySCs), and this involves BMP signalling. These data suggest a modified paradigm whereby the hub cells function as architects of the stem cell environment, drawing into proximity cellular components necessary for niche function. Self-renewal functions are shared by the hub cells and the CySCs. This work also reconciles key differences in GSC renewal between Drosophila testis and ovary niches, and highlights how a niche can coordinate the production of distinct lineages by having one stem cell type rely on a second.
巻・号 12(8)
ページ 806-11
公開日 2010-8-1
DOI 10.1038/ncb2086
PII ncb2086
PMID 20622868
PMC PMC2917891
MeSH Animals Drosophila Gene Expression Regulation, Developmental / genetics Gene Expression Regulation, Developmental / physiology Germ Cells / cytology Germ Cells / physiology Male Signal Transduction / genetics Signal Transduction / physiology Stem Cell Niche / physiology* Stem Cells / cytology* Stem Cells / physiology* Testis / metabolism*
IF 20.042
引用数 154
WOS 分野 CELL BIOLOGY
リソース情報
ショウジョウバエ Traffic Jam Gal4 (DGRC#104055)