Comparative Proteomic Profiling of Enamel of Neonatal Teeth and Normal Primary Teeth Using Liquid Chromatography-Mass...

Area of Science:

• Biochemistry
• Proteomics
• Dental Research

Background:

• Enamel composition and protein expression are crucial for tooth development and eruption.
• Understanding protein differences in neonatal teeth can elucidate early dental morphogenetic processes.

Purpose of the Study:

• To identify differentially expressed proteins in neonatal teeth enamel compared to control primary teeth enamel.
• To analyze the functional implications of these protein expression changes.

Main Methods:

• Proteomics workflow utilizing bottom-up liquid chromatography tandem mass spectrometry (LC-MS/MS).
• Analysis of 12 primary teeth samples (six neonatal, six control).
• Bioinformatics software for differential expression and functional annotation.

Main Results:

• Neonatal teeth enamel exhibited increased protein abundance, particularly those involved in osteogenesis and mineralization.
• Reduced expression of KLK-4 and protease inhibitors suggests an altered protease/protease inhibitor balance.
• Elevated odontogenic ameloblast-associated protein (ODAM) and proteins in complement/coagulation pathways were noted.

Conclusions:

• Neonatal teeth provide a model for studying elevated enamel proteins during morphogenetic growth.
• Findings suggest ODAM contributes to early tooth eruption.
• Enrichment of complement and coagulation proteins may indicate injury or infection response.