RRC ID 15363
Author Nakajima Y, Kuranaga E, Sugimura K, Miyawaki A, Miura M.
Title Nonautonomous apoptosis is triggered by local cell cycle progression during epithelial replacement in Drosophila.
Journal Mol. Cell. Biol.
Abstract Tissue remodeling involves collective cell movement, and cell proliferation and apoptosis are observed in both development and disease. Apoptosis and proliferation are considered to be closely correlated, but little is known about their coordinated regulation in physiological tissue remodeling in vivo. The replacement of larval abdominal epidermis with adult epithelium in Drosophila pupae is a simple model of tissue remodeling. During this process, larval epidermal cells (LECs) undergo apoptosis and are replaced by histoblasts, which are adult precursor cells. By analyzing caspase activation at the single-cell level in living pupae, we found that caspase activation in LECs is induced at the LEC/histoblast boundary, which expands as the LECs die. Manipulating histoblast proliferation at the LEC/histoblast boundary, either genetically or by UV illumination, indicated that local interactions with proliferating histoblasts triggered caspase activation in the boundary LECs. Finally, by monitoring the spatiotemporal dynamics of the S/G₂/M phase in histoblasts in vivo, we found that the transition from S/G₂ phases is necessary to induce nonautonomous LEC apoptosis at the LEC/histoblast boundary. The replacement boundary, formed as caspase activation is regulated locally by cell-cell communication, may drive the dynamic orchestration of cell replacement during tissue remodeling.
Volume 31(12)
Pages 2499-512
Published 2011-6
DOI 10.1128/MCB.01046-10
PII MCB.01046-10
PMID 21482673
PMC PMC3133417
MeSH Animals Apoptosis / physiology* Caspases / metabolism Cell Cycle / physiology* Cell Proliferation* Drosophila Proteins / genetics Drosophila Proteins / metabolism Drosophila melanogaster / anatomy & histology* Drosophila melanogaster / growth & development Drosophila melanogaster / physiology* Enzyme Activation Epithelial Cells / cytology Epithelial Cells / physiology Epithelium / physiology* Fluorescence Resonance Energy Transfer Larva / anatomy & histology Larva / physiology Lasers Pupa / anatomy & histology Pupa / physiology
IF 3.813
Times Cited 29
Drosophila Stock(s) of DGRC Kyoto