Identification of functional cooperative mutations of GNAO1 in human acute lymphoblastic leukemia.
Blood
; 137(9): 1181-1191, 2021 03 04.
Article
in En
| MEDLINE
| ID: mdl-32898863
ABSTRACT
Leukemogenesis is characterized by chromosomal rearrangements with additional molecular disruptions, yet the cooperative mechanisms are still unclear. Using whole-exome sequencing of a pair of monozygotic twins who were discordant for childhood acute lymphoblastic leukemia (ALL) with ETV6-RUNX1 (E/R) gene fusion successively after birth, we identified the R209C mutation of G protein subunit α o1 (GNAO1) as a new ALL risk loci. Moreover, GNAO1 missense mutations are recurrent in ALL patients and are associated with E/R fusion. Ectopic expression of the GNAO1 R209C mutant increased its GTPase activity and promoted cell proliferation and cell neoplastic transformation. Combined with the E/R fusion, the GNAO1 R209C mutation promoted leukemogenesis through activating PI3K/Akt/mTOR signaling. Reciprocally, activated mTORC1 phosphorylated p300 acetyltransferase, which acetylated E/R and thereby enhanced the E/R transcriptional activity of GNAO1 R209C. Thus, our study provides clinical evidence of the functional cooperation of GNAO1 mutations and E/R fusion, suggesting GNAO1 as a therapeutic target in human leukemia.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
GTP-Binding Protein alpha Subunits, Gi-Go
/
Precursor Cell Lymphoblastic Leukemia-Lymphoma
/
Carcinogenesis
Type of study:
Diagnostic_studies
/
Prognostic_studies
Limits:
Animals
/
Female
/
Humans
/
Male
Language:
En
Journal:
Blood
Year:
2021
Type:
Article
Affiliation country:
China