RRC ID 59139
著者 Lenhart KF, Capozzoli B, Warrick GSD, DiNardo S.
タイトル Diminished Jak/STAT Signaling Causes Early-Onset Aging Defects in Stem Cell Cytokinesis.
ジャーナル Curr Biol
Abstract Tissue renewal becomes compromised with age. Although defects in niche and stem cell behavior have been implicated in promoting age-related decline, the causes of early-onset aging defects are unknown. We have identified an early consequence of aging in germline stem cells (GSCs) in the Drosophila testis. Aging disrupts the unique program of GSC cytokinesis, with GSCs failing to abscise from their daughter cells. Abscission failure significantly disrupts both self-renewal and the generation of differentiating germ cells. Extensive live imaging and genetic analyses show that abscission failure is due to inappropriate retention of F-actin at the intercellular bridges between GSC-daughter cells. Furthermore, F-actin is regulated by the Jak/STAT pathway-increasing or decreasing pathway activity can rescue or exacerbate the age-induced abscission defect, respectively. Even subtle decreases to STAT activity are sufficient to precociously age young GSCs and induce abscission failure. Thus, this work has identified the earliest age-related defect in GSCs and has revealed a unique role for an established niche signaling pathway in controlling stem cell cytokinesis and in regulating stem cell behavior with age.
巻・号 29(2)
ページ 256-267.e3
公開日 2019-1-21
DOI 10.1016/j.cub.2018.11.064
PII S0960-9822(18)31594-X
PMID 30612906
PMC PMC6783278
MeSH Aging / physiology* Animals Cytokinesis Drosophila melanogaster / genetics Drosophila melanogaster / physiology* Germ Cells / metabolism Male Signal Transduction / physiology* Stem Cells / physiology* Testis / physiology
IF 9.601
引用数 2
リソース情報
ショウジョウバエ DGRC#104055