Document Detail

Control of cell-fate plasticity and maintenance of multipotency by DAF-16/FoxO in quiescent Caenorhabditis elegans.
MedLine Citation:
PMID:  23341633     Owner:  NLM     Status:  MEDLINE    
The Caenorhabditis elegans vulval precursor cells (VPCs) offer a paradigm for investigating how multipotency of progenitor cells is maintained during periods of quiescence. The VPCs are born in the first larval stage. When hermaphrodites are grown under favorable conditions, the EGF-mediated "inductive" signal and the LIN-12/Notch-mediated "lateral" signal confer a precise spatial pattern of distinct vulval cell fates in the third larval stage, a day after hatching. Under adverse conditions, hermaphrodites undergo a prolonged quiescent period as dauer larvae, which can endure for several months with progenitor cells such as VPCs in developmental arrest. If favorable conditions ensue, larvae recover and resume development as postdauer third stage larvae, with the same VPC spatial-patterning events as in continuously developing third stage larvae. Here, we identify several consequences of dauer life history for VPC specification. In wild-type dauers, VPCs undergo a phenomenon reminiscent of natural direct reprogramming to maintain or reestablish multipotency; they acquire an active block to signal transduction by EGF receptor and LIN-12/Notch and have a different mechanism for regulating transcription of the lateral signal. Furthermore, DAF-16/FoxO, a target of insulin/insulin-like growth factor signaling, is required to promote VPC fate plasticity during dauer and for normal vulval patterning after passage through dauer, suggesting that DAF-16/FoxO coordinates environment and life history with plasticity of cell fate.
Xantha Karp; Iva Greenwald
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2013-01-22
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  110     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-02-06     Completed Date:  2013-04-09     Revised Date:  2013-08-09    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2181-6     Citation Subset:  IM    
Department of Biochemistry and Molecular Biophysics, Howard Hughes Medical Institute, Columbia University, New York, NY 10032, USA.
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MeSH Terms
Animals, Genetically Modified
Caenorhabditis elegans / cytology*,  genetics,  growth & development,  metabolism*
Caenorhabditis elegans Proteins / genetics,  metabolism*
Gene Expression Regulation, Developmental
Genes, Helminth
Larva / cytology,  growth & development,  metabolism
Membrane Proteins / genetics,  metabolism
Multipotent Stem Cells / cytology,  metabolism
Receptor, Epidermal Growth Factor / genetics,  metabolism
Receptors, Notch / genetics,  metabolism
Signal Transduction
Transcription Factors / genetics,  metabolism*
Vulva / cytology,  growth & development,  metabolism
Grant Support
P40 OD010440/OD/NIH HHS; R01CA095389/CA/NCI NIH HHS; //Howard Hughes Medical Institute
Reg. No./Substance:
0/Caenorhabditis elegans Proteins; 0/Membrane Proteins; 0/Receptors, Notch; 0/Transcription Factors; 0/daf-16 protein, C elegans; 0/lag-2 protein, C elegans; EC, Epidermal Growth Factor

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