GIT1 contributes to autophagy in osteoclast through disruption of the binding of Beclin1 and Bcl2 under starvation condition.
Cell Death Dis
; 9(12): 1195, 2018 12 13.
Article
em En
| MEDLINE
| ID: mdl-30546041
ABSTRACT
Approximately 10-15% of all bone fractures do not heal properly, causing patient morbidity and additional medical care expenses. Therefore, better mechanism-based fracture repair approaches are needed. In this study, a reduced number of osteoclasts (OCs) and autophagosomes/autolysosomes in OC can be observed in GPCR kinase 2-interacting protein 1 (GIT1) knockout (KO) mice on days 21 and 28 post-fracture, compared with GIT1 wild-type (GIT1 WT) mice. Furthermore, in vitro experiments revealed that GIT1 contributes to OC autophagy under starvation conditions. Mechanistically, GIT1 interacted with Beclin1 and promoted Beclin1 phosphorylation at Thr119, which induced the disruption of Beclin1 and Bcl2 binding under starvation conditions, thereby, positively regulating autophagy. Taken together, the findings suggest a previously unappreciated role of GIT1 in autophagy of OCs during fracture repair. Targeting GIT1 may be a potential therapeutic approach for bone fractures.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Autofagia
/
Proteínas de Ciclo Celular
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Proteínas Proto-Oncogênicas c-bcl-2
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Proteínas Ativadoras de GTPase
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Proteína Beclina-1
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Cell Death Dis
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
China