A Novel Crosslinking Approach for Biomanufacturing of a Collagen-Based Skin Dermal Template

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Dermatology

Background:

• Third-degree burns cause severe skin damage with limited treatment options.
• Xenogeneic collagen scaffolds are used for neodermis formation, but current crosslinking is slow and variable.
• Existing Integra templates use dehydrothermal (DHT) crosslinking, a time-consuming process.

Purpose of the Study:

• To develop and validate a novel, rapid crosslinking method for collagen sponges.
• To compare the efficacy of UV/glutaraldehyde (GA) crosslinked sponges with commercial Integra templates.
• To assess the biocompatibility and wound healing potential of the novel collagen scaffolds.

Main Methods:

• A novel crosslinking process using UV irradiation followed by glutaraldehyde (GA) crosslinking was developed for collagen sponges.
• In vitro studies assessed human dermal fibroblast (WS-1) proliferation on the novel sponge and Integra templates.
• In vivo validation was performed using a full-thickness skin wound mouse model.

Main Results:

• The UV/GA method significantly reduced crosslinking time from 48 to 24 hours compared to DHT/GA.
• The novel collagen template supported WS-1 cell proliferation more effectively than the Integra template after 2 weeks in vitro.
• In vivo, the sponge template demonstrated comparable full-thickness skin wound regeneration to Integra templates without abnormal angiogenic or immune responses.

Conclusions:

• The UV/GA crosslinking approach provides a faster and tunable method for producing collagen sponge scaffolds.
• These novel scaffolds show promise as effective alternatives to current xenogeneic collagen-based skin grafts.
• The developed crosslinking process offers a viable alternative for the production of advanced wound healing materials.