FOXO4 maintains senescence in human umbilical cord mesenchymal stem cells by repressing apoptosis / 生理学报
Acta Physiologica Sinica
;
(6): 426-432, 2020.
Article
Dans Chinois
| WPRIM
| ID: wpr-827045
ABSTRACT
The purpose of the present study was to investigate the effects of forkhead box O4 (FOXO4) on the senescence of human umbilical cord-derived mesenchymal stem cells (hUC-MSCs). The hUC-MSCs were induced to senescence by natural passage, and FOXO4 expression was inhibited by lentiviral shRNA transfection. The hallmark of cell senescence was analyzed by β-galactosidase staining, and the cell viability was assayed by CCK-8 method. Flow cytometry was used to investigate the apoptosis of hUC-MSCs. The expression levels of Bcl-2, Bax, FOXO4, interleukin 6 (IL-6) and cleaved Caspase-3 were detected by qPCR and Western blot. Immunofluorescence staining was used to detect FOXO4 expression. The amount of IL-6 secreted by hUC-MSCs was detected by ELISA. The results showed that, compared with the passage 1, senescent hUC-MSCs showed up-regulated expression levels of Bax and FOXO4, down-regulated expression levels of Bcl-2 and cleaved Caspase-3, and increased IL-6 mRNA expression and secretion. FOXO4 inhibition in senescent hUC-MSCs promoted cell apoptosis, reduced cell viability, and inhibited the mRNA expression and secretion of IL-6. These results suggest that FOXO4 maintains viability and function of senescent hUC-MSCs by repressing their apoptosis response, thus accelerating senescence of the whole cell colony.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Facteurs de transcription
/
Cordon ombilical
/
Survie cellulaire
/
Vieillissement de la cellule
/
Apoptose
/
Protéines du cycle cellulaire
/
Transplantation de cellules souches mésenchymateuses
/
Facteurs de transcription Forkhead
/
Cellules souches mésenchymateuses
Limites du sujet:
Humains
langue:
Chinois
Texte intégral:
Acta Physiologica Sinica
Année:
2020
Type:
Article
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