p53/CEP-1 increases or decreases lifespan, depending on level of mitochondrial bioenergetic stress.
Aging Cell
; 8(4): 380-93, 2009 Aug.
Article
em En
| MEDLINE
| ID: mdl-19416129
ABSTRACT
Mitochondrial pathologies underlie a number of life-shortening diseases in humans. In the nematode Caenorhabditis elegans, severely reduced expression of mitochondrial proteins involved in electron transport chain-mediated energy production also leads to pathological phenotypes, including arrested development and/or shorter life; in sharp contrast, mild suppression of these same proteins extends lifespan. In this study, we show that the C. elegans p53 ortholog cep-1 mediates these opposite effects. We found that cep-1 is required to extend longevity in response to mild suppression of several bioenergetically relevant mitochondrial proteins, including frataxin - the protein defective in patients with Friedreich's Ataxia. Importantly, we show that cep-1 also mediates both the developmental arrest and life shortening induced by severe mitochondrial stress. These findings support an evolutionarily conserved function for p53 in modulating organismal responses to mitochondrial dysfunction and suggest that metabolic checkpoint responses may play a role in longevity control and in human mitochondrial-associated diseases.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Estresse Fisiológico
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Proteína Supressora de Tumor p53
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Caenorhabditis elegans
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Proteínas de Caenorhabditis elegans
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Metabolismo Energético
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Longevidade
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Mitocôndrias
Limite:
Animals
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article