Silver Ion-releasing Dressing (CONTREET) Does Not Disturb Angiogenesis and Microvascularization In Vivo

Area of Science:

• Biomedical Engineering
• Wound Healing Research
• Vascular Biology

Background:

• Silver-releasing wound dressings are utilized for their antimicrobial properties.
• Understanding their impact on wound healing, specifically angiogenesis, is crucial.
• Previous research has yielded mixed results regarding silver's effect on vascularization.

Purpose of the Study:

• To investigate the in vivo effects of silver-releasing wound dressings on angiogenesis and microvascularization.
• To compare the vascularization potential of silver-releasing implants versus silver-free controls.
• To quantify functional vessel density (FVD) around the implants over time.

Main Methods:

• Utilized dorsal skinfold chambers in BALB/c mice to assess wound dressing implants.
• Employed intravital fluorescence microscopy (IFM) for real-time visualization of microvessels.
• Quantified functional vessel density (FVD) at Days 3, 7, and 12 post-implantation.

Main Results:

• Silver-based implants showed a constant development of perfused microvessel networks.
• A significant increase in border zone FVD was observed for silver-based implants at Day 3 compared to controls.
• While FVD was higher in the silver group at Day 7, no significant differences were found by Day 12.

Conclusions:

• Silver-releasing wound dressings do not exhibit anti-angiogenic properties.
• The presence of silver in wound dressings supports, rather than inhibits, the development of new blood vessels.
• These findings suggest silver dressings can be safely used in wound management without compromising vascularization.