Differential analysis of the dentin soluble proteomic

Area of Science:

• Proteomics
• Biochemistry
• Dental Research

Background:

• Dentin's soluble proteomic composition is not fully characterized.
• Understanding dentin's proteomic profile is crucial for addressing caries.
• Tissue health and protein extraction methods may influence proteomic analysis.

Purpose of the Study:

• To conduct a differential analysis of dentin's soluble proteomic.
• To evaluate the impact of tissue health (intact vs. caries-affected) on dentin proteomic.
• To assess the influence of different protein extraction protocols on dentin proteomic.

Main Methods:

• Dentin samples from non-carious and carious teeth were used.
• Two protein extraction protocols were employed: guanidine-HCl/EDTA and acetic acid.
• Shotgun label-free proteomic analysis (nLC-ESI-MS/MS) was performed on extracted proteins.

Main Results:

• 158 human proteins were identified in dentin extracts.
• Caries-affected dentin yielded a greater number of soluble proteins than intact dentin.
• The guanidine-HCl/EDTA protocol extracted more proteins than the acetic acid protocol.
• Proteins involved in tissue turnover and remodeling were identified, particularly in caries-affected dentin.

Conclusions:

• Dentin's soluble protein identity and abundance are influenced by its pathological state and mineral-extraction protocol.
• These findings offer insights into dentin's proteomic phenotype.
• The study may guide the development of new caries prevention therapies.