Cited by 7Cell death mechanisms and regulationSlime Mold and Myxomycetes ResearchAutophagy in Disease and Therapy

Early nucleolar disorganization in Dictyostelium cell death

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Luciani, M F, Song, Y, Sahrane, A, Kosta, A, Golstein, P·2017·Cell Death & Disease

Abstract

Cell death occurs in all eukaryotes, but it is still not known whether some core steps of the cell death process are conserved. We investigated this using the protist Dictyostelium. The dissection of events in Dictyostelium vacuolar developmental cell death was facilitated by the sequential requirement for two distinct exogenous signals. An initial exogenous signal (starvation and cAMP) recruited some cells into clumps. Only within these clumps did subsequent cell death events take place. Contrary to our expectations, already this initial signal provoked nucleolar disorganization and irreversible inhibition of rRNA and DNA synthesis, reflecting marked cell dysfunction. The initial signal also primed clumped cells to respond to a second exogenous signal (differentiation-inducing factor-1 or c-di-GMP), which led to vacuolization and synthesis of cellulose encasings. Thus, the latter prominent hallmarks of developmental cell death were induced separately from initial cell dysfunction. We propose that (1) in Dictyostelium vacuolization and cellulose encasings are late, organism-specific, hallmarks, and (2) on the basis of our observations in this protist and of similar previous observations in some cases of mammalian cell death, early inhibition of rRNA synthesis and nucleolar disorganization may be conserved in some eukaryotes to usher in developmental cell death.

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Crossref · 10.1038/cddis.2016.444

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  • In D. discoideum, potentially lethal ATP depletion rapidly causes nucleolar disorganization and irreversible block in rRNA and DNA synthesis.

    “Interestingly, one of the most rapid consequences of potentially lethal ATP depletion in D. discoideum is an abrupt nucleolar disorganization coupled to an irreversible block in ribosomal RNA and DNA synthesis [1050].”

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  1. Arends MJ, Morris RG, Wyllie AH. Apoptosis: the role of the endonuclease. Am J Pathol 1990; 136: 593–608. 2156431 PMC1877493

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Authors
Luciani, M. F., Song, Y., Sahrane, A., Kosta, A., & Golstein, P.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Golstein, P
Venue
Cell Death & Disease
Published
2017-01-05
Volume
8
Issue
1
Pages
e2528-e2528
ISSN
2041-4889 (ISSN-L)
OpenAlex
W2570059429
Cited by
7
References
74
Citations by year
2019: 2 · 2018: 3 · 2017: 2
FWCI
0.78
Type
journal article
Language
en
Open access
Locations
  • Cell Death and Disease (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Association pour la Recherche sur le Cancer (ANR-10-INSB-04)
  • Agence Nationale de la Recherche (ANR-10–INSB–04, ANR-10–INSB–04-01, 10-INSB-04-01, ANR-10, ANR-10-INBS-0004)
  • Institut National de la Santé et de la Recherche Médicale
  • Centre National de la Recherche Scientifique
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Physical Sciences › Engineering › Biomedical Engineering › Slime Mold and Myxomycetes Research
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
developmental cell death, Dictyostelium, vacuolization, rRNA synthesis inhibition, DNA synthesis inhibition, starvation, cyclic AMP, c-di-GMP, DIF-1, clumping
MeSH terms
Cyclic AMP, Animals, Autophagy, Cell Nucleolus, Dictyostelium, Vacuoles, Protozoan Proteins, Cell Death, Apoptosis

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