Myofibroblast Gene Expression Profile after Tooth Extraction in the Rabbit

Area of Science:

• Oral surgery
• Bone biology
• Wound healing

Background:

• Alveolar bone volume decreases post-tooth extraction, particularly on the facial side.
• The specific role of myofibroblasts in bone remodeling remains under-investigated.

Purpose of the Study:

• To investigate myofibroblast gene expression during the 90-day healing period following tooth extraction.
• To understand the temporal dynamics of myofibroblast activity in post-extractive sockets.

Main Methods:

• Utilized Nanostring technology to analyze gene expression of 148 genes related to myofibroblasts, socket microenvironment, and autophagy.
• Studied 36 rabbits undergoing tooth extraction, with sockets assessed at 2, 7, 15, 30, 60, and 90 days post-extraction.
• Compared natural healing with wound scarification in the extractive sockets.

Main Results:

• Gene expression profiles demonstrated a clear time-dependent pattern throughout the 90-day healing period.
• Significant gene expression changes were observed around 15 days post-extraction.
• Genes associated with myofibroblast induction were upregulated in the initial 15 days and downregulated thereafter.

Conclusions:

• Myofibroblasts play a significant role in the early stages of healing, specifically within the first 15 days after tooth extraction.
• The findings highlight the critical involvement of myofibroblasts in the immediate post-operative period of alveolar bone remodeling.