Article ; Online: EGFR signal transduction is downregulated in C. elegans vulval precursor cells during dauer diapause.
Development (Cambridge, England)
2022 Volume 149, Issue 21
Abstract: Caenorhabditis elegans larvae display developmental plasticity in response to environmental conditions: in adverse conditions, second-stage larvae enter a reversible, long-lived dauer stage instead of proceeding to reproductive adulthood. Dauer entry ... ...
Abstract | Caenorhabditis elegans larvae display developmental plasticity in response to environmental conditions: in adverse conditions, second-stage larvae enter a reversible, long-lived dauer stage instead of proceeding to reproductive adulthood. Dauer entry interrupts vulval induction and is associated with a reprogramming-like event that preserves the multipotency of vulval precursor cells (VPCs), allowing vulval development to reinitiate if conditions improve. Vulval induction requires the LIN-3/EGF-like signal from the gonad, which activates EGFR-Ras-ERK signal transduction in the nearest VPC, P6.p. Here, using a biosensor and live imaging we show that EGFR-Ras-ERK activity is downregulated in P6.p in dauers. We investigated this process using gene mutations or transgenes to manipulate different steps of the pathway, and by analyzing LET-23/EGFR subcellular localization during dauer life history. We found that the response to EGF is attenuated at or upstream of Ras activation, and discuss potential membrane-associated mechanisms that could achieve this. We also describe other findings pertaining to the maintenance of VPC competence and quiescence in dauer larvae. Our analysis indicates that VPCs have L2-like and unique dauer stage features rather than features of L3 VPCs in continuous development. |
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MeSH term(s) | Animals ; Female ; Caenorhabditis elegans/metabolism ; Caenorhabditis elegans Proteins/metabolism ; Epidermal Growth Factor/genetics ; Epidermal Growth Factor/metabolism ; Vulva ; Signal Transduction/genetics ; Diapause ; ErbB Receptors/genetics ; ErbB Receptors/metabolism |
Chemical Substances | Caenorhabditis elegans Proteins ; Epidermal Growth Factor (62229-50-9) ; ErbB Receptors (EC 2.7.10.1) |
Language | English |
Publishing date | 2022-10-31 |
Publishing country | England |
Document type | Journal Article ; Research Support, N.I.H., Extramural |
ZDB-ID | 90607-4 |
ISSN | 1477-9129 ; 0950-1991 |
ISSN (online) | 1477-9129 |
ISSN | 0950-1991 |
DOI | 10.1242/dev.201094 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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