Nestin and dental pulp stones - a case report-driven hypothesis

Area of Science:

• Dentistry
• Stem Cell Biology
• Oral Pathology

Background:

• Dental pulp stem cells (DPSCs) are mesenchymal stem/stromal cells (MSCs) with multilineage differentiation potential.
• Dental pulp stones (PS) are calcified masses within the dental pulp, but their etiology remains unclear.
• The specific role of DPSCs in the formation of pulp stones has not been previously established.

Observation:

• An immunohistochemical study was conducted on a dental pulp sample containing pulp stones from an impacted third mandibular molar.
• Antibodies against CD34, Ki67, GFAP, α-SMA, and nestin were used to identify cell types.
• Endothelial cells expressed CD34, while α-SMA labeled pericytes/vascular smooth muscle cells.

Findings:

• DPSCs and osteoblasts on the surface of pulp stones were exclusively labeled with the nestin antibody.
• Stromal networks of nestin-expressing DPSCs were observed.
• These findings suggest DPSCs may serve as in situ osteogenic progenitors in PS formation.

Implications:

• This study proposes a novel hypothesis for the etiology of dental pulp stones involving DPSCs.
• Further research with larger sample sizes and broader marker panels is required to validate the DPSC hypothesis in PS development.
• Understanding DPSC roles in pulp stone formation could inform future regenerative dentistry approaches.