A simple method to quantify maturation of wound collagen

Area of Science:

• Biomedical Science
• Wound Healing Research
• Pharmacology

Background:

• Non-steroidal anti-inflammatory drugs (NSAIDs) and their zinc complexes are investigated for their effects on wound healing.
• Both NSAIDs and Zn(II)(NSAIDs)2 complexes reduce collagen content in wounds.
• Breaking strength (BS) of wounds is primarily determined by collagen content and maturation.

Purpose of the Study:

• To investigate the differential effects of NSAIDs and Zn(II)(NSAIDs)2 complexes on collagen maturation and wound breaking strength.
• To introduce a novel method for assessing collagen maturation in granulation tissues.
• To elucidate the impact of these treatments on the 'maturation age' of granulation tissue.

Main Methods:

• Dead space wound models were utilized to assess the effects of NSAIDs and Zn(II)(NSAIDs)2 complexes.
• Collagen content and wound breaking strength were measured.
• A new method was employed to evaluate the extent of collagen maturation.

Main Results:

• Both NSAIDs and Zn(II)(NSAIDs)2 complexes comparably reduced collagen content.
• Only NSAIDs significantly reduced wound breaking strength.
• NSAIDs markedly reduced collagen maturation, while Zn(II)(NSAIDs)2 complexes did not affect it in 10-day-old tissues.
• NSAID-treated tissue showed a maturation age of 6 days, while Zn(II)(NSAIDs)2 treated tissue showed 12 days, despite both being chronologically 10 days old.

Conclusions:

• NSAIDs impair wound healing by reducing collagen maturation and breaking strength.
• Zn(II)(NSAIDs)2 complexes do not negatively impact collagen maturation or wound strength.
• The findings suggest a potential therapeutic advantage of Zn(II)(NSAIDs)2 complexes over NSAIDs in wound healing contexts.