Proteomics-Based Analysis of Periosteal Functional Pathways at the Cranial Suture in Children With Premature Closure of the Cranial Suture
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Wei Xie1, Xinting Ji1, Yuantao Yang1
1Department of Orthopedics, Hainan Women and Children's Medical Center.
Insights
Premature suture closure in children may involve immune system changes. Proteomic analysis revealed altered protein expression in the periosteum, suggesting new therapeutic targets for cranial deformities.
Area of Science:
- Craniofacial development
- Molecular biology
- Immunology
Background:
- Premature closure of cranial sutures leads to increased intracranial pressure, brain dysfunction, and cranial deformities.
- The molecular mechanisms underlying this condition are not fully understood.
Purpose of the Study:
- To investigate the molecular mechanisms of premature cranial suture closure.
- To identify differentially expressed proteins in the periosteum of normal versus prematurely closed cranial sutures.
Main Methods:
- Proteomic analysis using label-free mass spectrometry on periosteal samples from 4 children.
- Differential expression analysis, Gene Ontology (GO), and Gene Set Enrichment Analysis (GSEA).
- Protein-protein interaction (PPI) network analysis.
Main Results:
- Identified 135 downregulated and 16 upregulated proteins.
- Differentially expressed proteins were significantly enriched in immune-related pathways.
- Functional enrichment analysis highlighted potential roles in cellular regulation and the immune system.
Conclusions:
- The periosteum plays a role in cranial suture development via cellular regulation and immune system interactions.
- Osteoblast-related pathways may be implicated in suture development.
- Findings suggest potential therapeutic targets for premature suture closure.
Introduction:
Premature closure of the cranial sutures refers to the premature closure of one or more cranial sutures, causing increased intracranial pressure and brain dysfunction, while the unclosed sutures widen under pressure, resulting in cranial deformity. However, the underlying molecular mechanisms remain unknown.
Methods:
The authors performed proteomic analysis of the periosteum at the normal cranial suture versus the periosteum at the closed cranial suture in 4 children. Expressed proteins were identified by label-free mass spectrometry followed by differential expression analysis. GO and GSEA enrichment analyses were performed to explore the pathways affected by differentially expressed proteins and the immune-related pathways. Network analysis was then applied to reveal the location of the differentially expressed proteins in the human protein-protein interaction (PPI) network.
Results:
The authors identified 135 downregulated proteins and 16 upregulated proteins. Functional enrichment analysis showed that differentially expressed proteins were enriched in immune-related pathways.
Conclusion:
The periosteum at the cranial sutures exerts a certain influence on suture development through cellular regulation and the immune system, suggesting that osteoblast-related pathways may contribute to suture development.
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