MicroRNAs Overcome Cell Fate Barrier by Reducing EZH2-Controlled REST Stability during Neuronal Conversion of Human Adult Fibroblasts.
Dev Cell
; 46(1): 73-84.e7, 2018 07 02.
Article
in En
| MEDLINE
| ID: mdl-29974865
ABSTRACT
The ability to convert human somatic cells efficiently to neurons facilitates the utility of patient-derived neurons for studying neurological disorders. As such, ectopic expression of neuronal microRNAs (miRNAs), miR-9/9∗ and miR-124 (miR-9/9∗-124) in adult human fibroblasts has been found to evoke extensive reconfigurations of the chromatin and direct the fate conversion to neurons. However, how miR-9/9∗-124 break the cell fate barrier to activate the neuronal program remains to be defined. Here, we identified an anti-neurogenic function of EZH2 in fibroblasts that acts outside its role as a subunit of Polycomb Repressive Complex 2 to directly methylate and stabilize REST, a transcriptional repressor of neuronal genes. During neuronal conversion, miR-9/9∗-124 induced the repression of the EZH2-REST axis by downregulating USP14, accounting for the opening of chromatin regions harboring REST binding sites. Our findings underscore the interplay between miRNAs and protein stability cascade underlying the activation of neuronal program.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Repressor Proteins
/
MicroRNAs
/
Neurogenesis
/
Enhancer of Zeste Homolog 2 Protein
/
Neurons
Type of study:
Prognostic_studies
Limits:
Adult
/
Animals
/
Female
/
Humans
/
Infant
/
Male
/
Newborn
Language:
En
Journal:
Dev Cell
Journal subject:
EMBRIOLOGIA
Year:
2018
Type:
Article
Affiliation country:
United States