Mitochondria-Derived H2O2 Promotes Symmetry Breaking of the C. elegans Zygote.
Dev Cell
; 53(3): 263-271.e6, 2020 05 04.
Article
em En
| MEDLINE
| ID: mdl-32275886
ABSTRACT
Symmetry breaking is an essential step in cell differentiation and early embryonic development. However, the molecular cues that trigger symmetry breaking remain largely unknown. Here, we show that mitochondrial H2O2 acts as a symmetry-breaking cue in the C. elegans zygote. We find that symmetry breaking is marked by a local H2O2 increase and coincides with a relocation of mitochondria to the cell cortex. Lowering endogenous H2O2 levels delays the onset of symmetry breaking, while artificially targeting mitochondria to the cellular cortex using a light-induced heterodimerization technique is sufficient to initiate symmetry breaking in a H2O2-dependent manner. In wild-type development, both sperm and maternal mitochondria contribute to symmetry breaking. Our findings reveal that mitochondrial H2O2-signaling promotes the onset of polarization, a fundamental process in development and cell differentiation, and this is achieved by both mitochondrial redistribution and differential H2O2-production.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Zigoto
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Caenorhabditis elegans
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Padronização Corporal
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Proteínas de Caenorhabditis elegans
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Embrião não Mamífero
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Peróxido de Hidrogênio
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Mitocôndrias
Limite:
Animals
Idioma:
En
Revista:
Dev Cell
Ano de publicação:
2020
Tipo de documento:
Article