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Isolation of Mesenchymal Stem Cells from Human Alveolar Periosteum and Effects of Vitamin D on Osteogenic Activity of Periosteum-derived Cells
Published on: May 4, 2018
Homeobox C10 inhibits the osteogenic differentiation potential of mesenchymal stem cells
Guoqing Li1,2, Nannan Han1,3, Haoqing Yang1
1a Laboratory of Molecular Signaling and Stem Cells Therapy, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction , Capital Medical University School of Stomatology , Beijing , China.
Purpose:
Mesenchymal stem cells (MSCs) are a reliable cell source for tissue regeneration. However, the molecular mechanisms underlying the directed differentiation of MSCs remain unclear which impedes potential clinical applications. Recent studies have discovered that Homeobox (HOX) genes are involved in the differentiation regulation of MSCs and bone formation. In this study, we investigate the HOXC10 function in the osteogenic differentiation potential of MSCs.
Materials And Methods:
Stem cells from apical papilla (SCAPs) and adipose-derived stem cells (ADSCs) were used in this study. Alkaline phosphatase (ALP) activity assays, ALP staining, Alizarin red staining, quantitative calcium analysis, osteogenesis-associated gene expression, and in vivo transplantation experiments were used to study osteogenic differentiation potential.
Results:
Our results showed that overexpression of HOXC10 in SCAPs inhibited ALP activity and mineralization in vitro and decreased the mRNA expression of collagen alpha-1 (I) chain, bone sialoprotein, osteocalcin, and a key transcription factor, runt-related transcription factor 2, in SCAPs. Depletion of HOXC10 promoted osteogenic differentiation in SCAPs in vitro. In addition, in vivo transplantation experiments in nude mice confirmed that SCAPs osteogenesis was triggered when HOXC10 was downregulated. Furthermore, depletion of HOXC10 also enhanced osteogenic differentiation in ADSCs.
Conclusions:
Taken together, these results indicated that HOXC10 decreased the MSC osteogenic differentiation potential. Thus, inhibition of HOXC10 in MSCs might have the potential to improve tissue regeneration and provide insight into the mechanism underlying the directed differentiation of MSCs.
Insights
Homeobox C10 (HOXC10) inhibits mesenchymal stem cell (MSC) osteogenic differentiation. Inhibiting HOXC10 enhances MSCs for potential tissue regeneration applications.
Area of Science:
- Stem cell biology
- Molecular mechanisms of differentiation
- Tissue engineering
Background:
- Mesenchymal stem cells (MSCs) are crucial for tissue regeneration, but their differentiation mechanisms are not fully understood.
- Homeobox (HOX) genes are implicated in MSC differentiation and bone formation.
- Understanding HOX gene function is key to advancing clinical applications of MSCs.
Purpose of the Study:
- To investigate the role of HOXC10 in regulating the osteogenic differentiation potential of MSCs.
- To elucidate the molecular mechanisms by which HOXC10 influences bone formation.
- To assess the therapeutic potential of modulating HOXC10 for tissue regeneration.
Main Methods:
- Utilized stem cells from apical papilla (SCAPs) and adipose-derived stem cells (ADSCs).
- Assessed osteogenic differentiation via alkaline phosphatase (ALP) activity, ALP staining, Alizarin red staining, and calcium analysis.
- Analyzed osteogenesis-associated gene expression and performed in vivo transplantation experiments.
Main Results:
- HOXC10 overexpression in SCAPs inhibited ALP activity, mineralization, and key osteogenic gene expression (COL1A1, BSP, OCN, RUNX2).
- HOXC10 depletion promoted osteogenic differentiation in SCAPs and ADSCs in vitro.
- In vivo studies confirmed that downregulating HOXC10 triggered SCAP osteogenesis.
Conclusions:
- HOXC10 significantly decreases the osteogenic differentiation potential of MSCs.
- Inhibiting HOXC10 in MSCs may enhance tissue regeneration.
- This study provides insights into the directed differentiation mechanisms of MSCs.
