Polycomb and Notch signaling regulate cell proliferation potential during Caenorhabditis elegans life cycle

Coraggio, Francesca; Püschel, Ringo; Marti, Alisha; Meister, Pierre (2018). Polycomb and Notch signaling regulate cell proliferation potential during Caenorhabditis elegans life cycle. Life science alliance, 2(1), e201800170. EMBO Press 10.26508/lsa.201800170

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Stable cell fate is an essential feature for multicellular organisms in which individual cells achieve specialized functions. Caenorhabditis elegans is a great model to analyze the determinants of cell fate stability because of its invariant lineage. We present a tractable cell fate challenge system that uses the induction of fate-specifying transcription factors. We show that wild-type differentiated animals are highly resistant to fate challenge. Removal of heterochromatin marks showed marked differences: the absence of histone 3 lysine 9 methylation (H3K9) has no effect on fate stability, whereas Polycomb homolog mes-2 mutants lacking H3K27 methylation terminally arrest larval development upon fate challenge. Unexpectedly, the arrest correlated with widespread cell proliferation rather than transdifferentiation. Using a candidate RNAi larval arrest-rescue screen, we show that the LIN-12Notch pathway is essential for hyperplasia induction. Moreover, Notch signaling appears downstream of food-sensing pathways, as dauers and first larval stage diapause animals are resistant to fate challenge. Our results demonstrate an equilibrium between proliferation and differentiation regulated by Polycomb and Notch signaling in the soma during the nematode life cycle.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Cell Biology
09 Interdisciplinary Units > Microscopy Imaging Center MIC

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Coraggio, Francesca; Püschel, Ringo; Marti, Alisha and Meister, Pierre

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

2575-1077

Publisher:

EMBO Press

Funders:

[UNSPECIFIED] University of Bern
[4] Swiss National Science Foundation
[UNSPECIFIED] Fondation Suisse pour la Recherche sur les Maladies Musculaires

Language:

English

Submitter:

Pierre Meister

Date Deposited:

08 Apr 2019 14:21

Last Modified:

08 Apr 2019 14:21

Publisher DOI:

10.26508/lsa.201800170

PubMed ID:

30599047

BORIS DOI:

10.7892/boris.124028

URI:

https://boris.unibe.ch/id/eprint/124028

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