Verapamil-containing silicone gel reduces scar hypertrophy

Area of Science:

• Dermatology
• Wound Healing
• Pharmacology

Background:

• Hypertrophic scars are common fibroproliferative lesions.
• Topical silicone gel is a standard treatment.
• Verapamil, a calcium channel blocker, shows potential for scar treatment.

Purpose of the Study:

• To investigate the efficacy of verapamil-added topical silicone gel in treating hypertrophic scars.
• To determine optimal concentrations of verapamil for enhanced scar treatment.

Main Methods:

• Hypertrophic scars were induced in a rabbit ear model.
• Varying concentrations of verapamil-added silicone gel (0.1, 1, 10 mg/g) were applied daily for 28 days.
• Scar elevation index, fibroblast count, capillary count, and collagen I expression were assessed.

Main Results:

• Verapamil-added silicone gel significantly alleviated hypertrophic scar features compared to control and silicone-only groups.
• Histological examination revealed reduced scar elevation index, fibroblast count, and capillary formation.
• Western blot analysis showed decreased collagen I protein expression in groups treated with 1 mg/g and 10 mg/g verapamil-added silicone.

Conclusions:

• Verapamil-added topical silicone gel enhances hypertrophic scar treatment outcomes.
• A therapeutic concentration of at least 1 mg/g verapamil in silicone gel is suggested.
• Further research into optimal concentrations and mechanisms of action is warranted.