NLRP3 Mediates Submandibular Gland Regeneration in Duct Ligation/De-Ligation Model

Area of Science:

• Regenerative Medicine
• Immunology
• Cell Biology

Background:

• Macrophages are vital for tissue repair after injury.
• NLRP3 inflammasome initiates inflammation and aids tissue regeneration.
• The role of NLRP3 in salivary gland regeneration remains unclear.

Purpose of the Study:

• To investigate NLRP3's role in macrophage-mediated submandibular gland regeneration.
• To understand the interaction between NLRP3, macrophages, and salivary gland repair.

Main Methods:

• Established a rat model of submandibular gland duct ligation/de-ligation.
• Created an NLRP3 knockdown model using retrograde transduction.
• Validated CCL2's role in macrophage activation in vitro and in vivo.

Main Results:

• NLRP3 activation occurred during submandibular gland injury and repair.
• NLRP3 knockdown impaired regeneration, reduced inflammatory factors, and altered macrophage polarization.
• CCL2 supplementation rescued macrophage activation and proliferation after NLRP3 inhibition.

Conclusions:

• NLRP3 regulates macrophage activation through CCL2.
• This interaction promotes submandibular gland tissue regeneration.