Extracorporeal shock waves improve angiogenesis after full thickness burn

Area of Science:

• Regenerative Medicine
• Wound Healing Research
• Biomedical Engineering

Background:

• Extensive burn wounds pose significant clinical challenges, primarily due to infection risks and potential septicemia.
• Accelerating the healing process of burn injuries is crucial for patient recovery and reducing complications.

Purpose of the Study:

• To investigate the efficacy of extracorporeal shock wave application (ESWA) in accelerating burn wound healing.
• To analyze the impact of ESWA on microcirculation, angiogenesis, and leukocyte-endothelium interactions in burn models.

Main Methods:

• Full-thickness burns were induced in hairless mice ears.
• Mice were randomized into groups receiving low-energy (0.04 mJ/mm(2)) or very low-energy (0.015 mJ/mm(2)) ESWA, a control group, and sham groups.
• Intravital fluorescent microscopy was employed to assess microcirculatory parameters, angiogenesis, and leukocyte behavior post-burn.

Main Results:

• Low-energy ESWA (0.04 mJ/mm(2)) significantly accelerated angiogenesis, evidenced by a reduced non-perfused area at day 12 compared to controls (5.3% vs. 12.6%, p=0.005).
• Both ESWA groups exhibited improved blood flow post-burn compared to the control group.
• ESWA treatment significantly increased the number of rolling leukocytes, indicating enhanced inflammatory response and potentially improved wound healing mechanisms.

Conclusions:

• Extracorporeal shock wave application positively influences key parameters of burn wound healing, particularly angiogenesis and leukocyte behavior.
• Both tested ESWA intensities promoted better angiogenesis and blood flow than the control group.
• Higher intensity ESWA (0.04 mJ/mm(2)) yielded superior outcomes compared to very low-intensity ESWA, suggesting a dose-dependent effect.