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Updated: May 14, 2026
Isolation and Enrichment of Human Adipose-derived Stromal Cells for Enhanced Osteogenesis
Published on: January 12, 2015
Glycogen synthase kinase 3β promotes osteogenic differentiation of murine adipose-derived stromal cells
Jeong-Eun Huh1, Ryeojin Ko, Hyun Ju Jung
1Division of Life and Pharmaceutical Sciences, Ewha Womans University, Seoul, Korea.
Abstract:
Although the role of glycogen synthase kinase 3β (GSK3β) in osteogenic differentiation of bone marrow-derived mesenchymal stromal cells (BMSCs) is well-characterized as a negative regulator of β-catenin, its effect on osteogenesis of adipose-derived stromal cells (ADSCs) is poorly understood. Here, we show that GSK3β positively regulates osteogenic differentiation of murine ADSCs. Gain-of-function studies showed that GSK3β promotes in vitro osteogenesis of ADSCs. Regulation of GSK3β activity in ADSCs, either by small interfering RNA (siRNA)-mediated GSK3β silencing or by pharmacological inhibitors, blunted osteogenesis and the expression of osteogenic markers. Importantly, we demonstrated that transgenic mice, engineered to overexpress the constitutively active GSK3β (GSK3β-S9A) mutant, exhibited a marked increase in osteogenesis, whereas expression of the catalytically inactive GSK3β (GSK3β-K85A) in mice inhibits osteogenic differentiation. Molecular analyses showed that the enhanced osteoblast differentiation induced by GSK3β was mediated by downregulation of β-catenin. Remarkably, β-catenin silencing enhances osteogenesis and osteoblast marker gene expression such as alkaline phosphatase (ALP) and osterix. Taken together, these findings demonstrate a novel role for GSK3β in the regulation of osteogenic differentiation in ADSCs.
Insights
Glycogen synthase kinase 3β (GSK3β) positively regulates osteogenic differentiation in adipose-derived stromal cells (ADSCs). This study reveals GSK3β
Area of Science:
- Cell Biology
- Stem Cell Research
- Biochemistry
Background:
- Glycogen synthase kinase 3β (GSK3β) is a known negative regulator of β-catenin in bone marrow-derived mesenchymal stromal cells (BMSCs).
- The role of GSK3β in the osteogenic differentiation of adipose-derived stromal cells (ADSCs) remains largely uncharacterized.
Purpose of the Study:
- To investigate the role of GSK3β in the osteogenic differentiation of murine ADSCs.
- To elucidate the molecular mechanisms by which GSK3β influences osteogenesis in ADSCs.
Main Methods:
- Gain-of-function studies using GSK3β overexpression.
- GSK3β activity modulation via siRNA-mediated silencing and pharmacological inhibitors.
- Analysis of osteogenic markers and β-catenin levels.
- In vivo studies using transgenic mice expressing GSK3β mutants (GSK3β-S9A and GSK3β-K85A).
Main Results:
- GSK3β positively regulates in vitro osteogenic differentiation of ADSCs.
- Inhibition of GSK3β activity blunted osteogenesis and osteogenic marker expression.
- Overexpression of active GSK3β enhanced osteogenesis, while inactive GSK3β inhibited it.
- GSK3β-induced osteoblast differentiation was mediated by β-catenin downregulation.
- β-catenin silencing promoted osteogenesis and expression of alkaline phosphatase (ALP) and osterix.
Conclusions:
- GSK3β plays a novel positive regulatory role in ADSC osteogenic differentiation.
- The mechanism involves the downregulation of β-catenin.
- GSK3β represents a potential therapeutic target for bone regeneration strategies involving ADSCs.
