Forced lipophagy reveals that lipid droplets are required for early embryonic development in mouse.
Development
; 145(4)2018 02 23.
Article
em En
| MEDLINE
| ID: mdl-29475974
ABSTRACT
Although autophagy is classically viewed as a non-selective degradation system, recent studies have revealed that various forms of selective autophagy also play crucial physiological roles. However, the induction of selective autophagy is not well understood. In this study, we established a forced selective autophagy system using a fusion of an autophagy adaptor and a substrate-binding protein. In both mammalian cells and fertilized mouse embryos, efficient forced lipophagy was induced by expression of a fusion of p62 (Sqstm1) and a lipid droplet (LD)-binding domain. In mouse embryos, induction of forced lipophagy caused a reduction in LD size and number, and decreased the triglyceride level throughout embryonic development, resulting in developmental retardation. Furthermore, lipophagy-induced embryos could eliminate excess LDs and were tolerant of lipotoxicity. Thus, by inducing forced lipophagy, expression of the p62 fusion protein generated LD-depleted cells, revealing an unexpected role of LD during preimplantation development.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Autofagia
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Desenvolvimento Embrionário
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Metabolismo dos Lipídeos
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Gotículas Lipídicas
Limite:
Animals
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article