GOLPH3 silencing inhibits adhesion of glioma U251 cells by regulating ITGB1 degradation under serum starvation.
Biochem Biophys Res Commun
; 532(2): 195-199, 2020 11 05.
Article
em En
| MEDLINE
| ID: mdl-32859376
ABSTRACT
GOLPH3, an oncoprotein, plays crucial roles in tumor etiology. Compelling evidences have demonstrated that GOLPH3 contributes to regulate tumor cell growth, migration and invasion under normal nutrient condition. However, the oncogenic activity of GOLPH3 under serum starvation remains largely unknown. In this study, we reported that GOLPH3 depletion led to marked reduction in adhesion of glioma U251 cells, particularly under serum deprivation. We found that silencing of GOLPH3 expression reduced the protein amount of ITGB1 only in serum-free medium. Further insights into the mechanism between GOLPH3 and ITGB1, we applied proteasome or lysosome inhibitor to block the degradation of ITGB1, and identified GOLPH3 silencing can prompt ITGB1 lysosomal degradation under serum starvation. Finally, we found the reductions in glioma cell adhesion and ITGB1 protein amount could be rescued by ITGB1 overexpression. Taken together, these results show that GOLPH3 contributes to the adhesion of glioma cells by regulating the lysosomal degradation of ITGB1 under serum starvation.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Integrina beta1
/
Glioma
/
Proteínas de Membrana
Limite:
Humans
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article