Blocking RAGE improves wound healing in diabetic pigs.

Area of Science:

• Biomedical Science
• Wound Healing Research
• Diabetes Complications

Background:

• Receptor for Advanced Glycated End-products (RAGE) is upregulated in diabetes.
• Elevated RAGE expression is linked to impaired wound healing in diabetic conditions.
• Targeting RAGE presents a potential therapeutic strategy for enhancing diabetic wound repair.

Purpose of the Study:

• To investigate the efficacy of a RAGE-blocking antibody in accelerating dorsal wound healing in diabetic pigs.
• To compare the wound healing outcomes between systemic anti-RAGE antibody treatment and non-immune IgG control.
• To evaluate the role of decellularized porcine skin patches in conjunction with RAGE inhibition.

Main Methods:

• Diabetic Yucatan minipigs received dorsal wounds treated with decellularized porcine skin patches or left open.
• Systemic administration of anti-RAGE antibody (CR-3) or non-immune IgG was given.
• Wound size was measured at 2 and 4 weeks post-wounding.
• Quantitative immunohistology was performed to assess collagen deposition and inflammatory markers.

Main Results:

• Systemic anti-RAGE antibody treatment significantly accelerated wound healing, reducing wound size by 4 weeks compared to IgG treatment (40.9% vs 69.2%).
• Immunohistology revealed increased collagen staining in wounds treated with the RAGE antibody.
• RAGE, Macrophages, and IL-6 staining were positive in IgG-treated wounds but negative in anti-RAGE treated wounds.
• Decellularized porcine skin patches showed limited incorporation and did not enhance healing.

Conclusions:

• Parenteral administration of a RAGE-blocking antibody effectively promotes wound healing in a diabetic pig model.
• Targeting RAGE is a promising therapeutic approach for managing impaired wound healing in diabetes.
• Decellularized porcine skin patches were not effective in this study for improving diabetic wound healing.