CHANGES OF WNT/B-CATENIN SIGNALING AND DIFFERENTIATION POTENTIAL OF BONE MARROW MESENCHYMAL STEM CELLS IN PROCESS OF...

Area of Science:

• Stem Cell Biology
• Bone Biology
• Endocrinology

Background:

• Osteoblastogenesis and adipogenesis of bone marrow stromal cells (BMSCs) are crucial for bone formation.
• The role of Wnt/β-catenin signaling in altered BMSC differentiation potential and osteoporosis remains unclear.
• Ovariectomized (OVX) rats are a model for osteoporosis, exhibiting decreased bone content.

Purpose of the Study:

• To investigate the impact of ovariectomy on the osteogenic and adipogenic potential of BMSCs.
• To determine the involvement of Wnt/β-catenin signaling in these changes.
• To explore the relationship between altered BMSC potential and bone loss in OVX rats.

Main Methods:

• BMSCs were isolated from OVX and control rats.
• Cell proliferation was assessed using CCK-8 assays.
• Osteogenic and adipogenic differentiation were evaluated via ALP activity, Alizarin red S, Oil red O staining, and RT-PCR.

Main Results:

• OVX BMSCs exhibited reduced proliferation and osteogenic potential but increased adipogenic potential compared to controls.
• β-catenin levels were decreased in OVX BMSCs, indicating suppressed Wnt/β-catenin signaling.
• These findings suggest a link between Wnt/β-catenin pathway suppression and altered BMSC differentiation.

Conclusions:

• Changes in the Wnt canonical signaling pathway are associated with imbalanced osteogenic and adipogenic potential of BMSCs.
• This imbalance may be a significant factor contributing to bone loss in ovariectomized osteoporosis rats.
• Targeting Wnt/β-catenin signaling could be a therapeutic strategy for osteoporosis.