Glycation promotes pulp calcification in Type 2 diabetes rat model

Area of Science:

• Biomedical Science
• Dental Research
• Pathology

Background:

• Intrapulpal calcifications are observed in diabetic patients.
• The role of advanced glycation end products (AGEs) in dental pulp calcification is not fully understood.

Purpose of the Study:

• To investigate the association between ectopic calcifications in dental pulp and AGEs in obese type 2 diabetic rats (SDT-fatty rats).
• To elucidate the mechanism of pulp stone formation in the dental pulp of diabetic individuals.

Main Methods:

• Utilized electron microscopy and immunohistochemical analysis to study pathologic calcification in SDT-fatty rat dental pulp.
• Performed mechanical analysis of the periapical region of molar teeth under occlusal force.
• Conducted in silico simulation to analyze strain distribution.

Main Results:

• Pathogenic pulpal calcifications and granular calcification were observed in SDT-fatty rats correlating with elevated blood glucose.
• Strong expression of Pentosidine (an AGE) and its receptor, along with inflammatory markers (S100A8, TNF-α, IL-6), were found in the dental pulp.
• Blood flow disorder, pulp cell hypoxia, and concentrated strain on the root apex under occlusal force were identified.

Conclusions:

• Glycation contributes to blood vessel fragility, while occlusal forces cause mechanical damage.
• These combined factors—glycation-induced vascular fragility and mechanical stress—are key contributors to intrapulpal calcification in diabetes.