CGRP-Loaded ROS-Responsive Hydrogel Restores Neuro-Angiogenic Signaling to Promote Bone Regeneration in...

Area of Science:

• Oral biology
• Endocrinology
• Neuroscience

Background:

• Diabetes mellitus is a significant risk factor for periodontitis.
• Diabetic neuropathy's role in diabetes-associated periodontitis bone loss is unclear.
• Sensory nerve changes in the periodontium during diabetes require further investigation.

Purpose of the Study:

• To investigate the impact of diabetic neuropathy on periodontal bone destruction.
• To explore the role of calcitonin gene-related peptide (CGRP) in diabetes-associated periodontitis.
• To evaluate CGRP-loaded hydrogels as a therapeutic strategy for periodontal bone regeneration.

Main Methods:

• Utilized db/db mice to model diabetes-associated periodontitis.
• Assessed periodontal nerve density and CGRP expression.
• Investigated the effects of periodontal denervation and CGRP delivery.
• Developed and tested injectable PVA/tsPBA hydrogels for sustained CGRP release.

Main Results:

• Diabetic mice showed reduced periodontal nerve density and CGRP levels.
• Periodontal denervation mimicked increased alveolar bone loss in diabetic mice.
• CGRP deficiency correlated with reduced type H vessel density and osteoprogenitors.
• CGRP-loaded hydrogels promoted alveolar bone regeneration by inducing type H vessels in diabetic mice.

Conclusions:

• Diabetes-induced sensory nerve damage exacerbates periodontal bone loss.
• CGRP signaling is crucial for maintaining periodontal vascularity and osteoprogenitors.
• CGRP-loaded hydrogels represent a promising therapeutic approach for periodontal bone regeneration in diabetes.