Novel Functional Peptide for Next-Generation Vital Pulp Therapy

Area of Science:

• Biomaterials Science
• Regenerative Dentistry
• Molecular Biology

Background:

• Existing pulp-capping materials lack focus on pulpal repair mechanisms.
• Dentin matrix components degraded by MMP-20 yield S100A7 and S100A8, which promote pulpal wound healing.
• Recombinant proteins pose clinical and cost challenges for pulp capping.

Purpose of the Study:

• To identify and evaluate functional peptides derived from the S100 protein family for dental pulp repair.
• To investigate the therapeutic potential of S100-derived peptides as next-generation vital pulp capping agents.

Main Methods:

• Amino acid sequence alignment of mammalian S100 proteins to identify candidate peptides.
• Peptide array using human dental pulp stem cells (hDPSCs) to assess mineralization-inducing ability.
• Direct pulp-capping experiments in a rat model and LC-MS/MS analysis to determine mechanisms.

Main Results:

• Four functional peptides from S100A8 and S100A9 were identified.
• One S100A8-derived peptide significantly enhanced tertiary dentin formation in vivo.
• The S100A8 peptide inhibits inflammatory responses, promoting dentin formation via interaction with other molecules.

Conclusions:

• A novel S100A8-derived peptide effectively promotes dental pulp wound healing and tertiary dentinogenesis.
• This peptide represents a promising candidate for developing advanced biological vital pulp therapies.
• Findings offer insights into molecular mechanisms for enhanced pulpal regeneration.