O-GlcNAc glycosylation orchestrates fate decision and niche function of bone marrow stromal progenitors.
Elife
; 122023 03 02.
Article
in En
| MEDLINE
| ID: mdl-36861967
ABSTRACT
In mammals, interactions between the bone marrow (BM) stroma and hematopoietic progenitors contribute to bone-BM homeostasis. Perinatal bone growth and ossification provide a microenvironment for the transition to definitive hematopoiesis; however, mechanisms and interactions orchestrating the development of skeletal and hematopoietic systems remain largely unknown. Here, we establish intracellular O-linked ß-N-acetylglucosamine (O-GlcNAc) modification as a posttranslational switch that dictates the differentiation fate and niche function of early BM stromal cells (BMSCs). By modifying and activating RUNX2, O-GlcNAcylation promotes osteogenic differentiation of BMSCs and stromal IL-7 expression to support lymphopoiesis. In contrast, C/EBPß-dependent marrow adipogenesis and expression of myelopoietic stem cell factor (SCF) is inhibited by O-GlcNAcylation. Ablating O-GlcNAc transferase (OGT) in BMSCs leads to impaired bone formation, increased marrow adiposity, as well as defective B-cell lymphopoiesis and myeloid overproduction in mice. Thus, the balance of osteogenic and adipogenic differentiation of BMSCs is determined by reciprocal O-GlcNAc regulation of transcription factors, which simultaneously shapes the hematopoietic niche.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Osteogenesis
/
Bone Marrow
Type of study:
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
Elife
Year:
2023
Type:
Article
Affiliation country:
United States