Splint-free line drawing model: An innovative method for excisional wound models

Area of Science:

• Regenerative Medicine
• Wound Healing Research
• Animal Models

Background:

• Mouse excisional wound models are limited in mimicking human skin regeneration due to differences in healing mechanisms.
• Reepithelialisation is a key factor in human skin regeneration, often not fully replicated in standard mouse models.

Purpose of the Study:

• To enhance the correlation between mouse excisional wound models and human skin regeneration.
• To develop practical methods for measuring wound area, reepithelialisation, and contraction.
• To validate simple excisional wounds as a robust model for studying wound healing.

Main Methods:

• Comparison of splint-free and splinted excisional wound groups in C57BL/6J mice.
• Monitoring of reepithelialisation and contraction at various time points post-wounding.
• Application of a formula to calculate the areas of wound reepithelialisation and contraction.

Main Results:

• Simple excisional wounds in mice demonstrate healing through both contraction and reepithelialisation.
• Reepithelialisation was found to contribute 46% to the closure of full-thickness excisional wounds.
• The study validates the use of splint-free excisional wounds as a stable and reliable model.

Conclusions:

• Excisional wound models in rodents are effective for studying wound healing processes.
• A straightforward formula can accurately quantify reepithelialisation in rodent wound models.
• This research offers improved methods for assessing wound healing, enhancing translational relevance.