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Stimulating angiogenesis by hyperbaric oxygen in an isolated tissue construct.

Valerie Roth¹, Margo S Herron, Reuben A Bueno

¹Division of Plastic & Reconstructive Surgery, Southern Illinois University School of Medicine, Springfield, Ill, USA.

Undersea & Hyperbaric Medicine : Journal of the Undersea and Hyperbaric Medical Society, Inc

|February 2, 2012

Summary

This summary is machine-generated.

Short-term hyperbaric oxygen (HBO2) therapy significantly boosts angiogenesis in tissue constructs. Prolonged HBO2 treatment may reduce vascularization, suggesting optimal intervals are crucial for therapeutic benefits.

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Area of Science:

Biomedical Engineering
Regenerative Medicine
Tissue Engineering

Background:

Hyperbaric oxygen (HBO2) therapy is known to promote angiogenesis in myocutaneous flaps.
Optimal HBO2 treatment durations for maximizing angiogenesis require further investigation.

Purpose of the Study:

To determine the ideal treatment intervals for hyperbaric oxygen therapy to achieve peak angiogenesis.
To evaluate the impact of short-term versus prolonged HBO2 exposure on vascularization.

Main Methods:

Lewis rats underwent subcutaneous implantation of silicone molds containing fat, vascular pedicle, and Matrigel.
Animals were randomized into groups receiving HBO2 treatment (2.5 atm, 100% O2, 90 min, 2x/day) for seven or 14 days, or control treatment (room air).
Angiogenesis was assessed by vascularization grading at the Matrigel/fat boundary post-harvest and digital imaging.

Main Results:

Seven-day HBO2 treatment significantly increased vascularization compared to seven-day controls (p = 0.008).
Fourteen-day HBO2 treatment resulted in significantly decreased vascularization compared to 14-day controls (p = 0.012).
No significant difference in vascularization was observed between seven-day HBO2-treated implants and 14-day controls (p > 0.05).

Conclusions:

Short-term HBO2 exposure enhances angiogenesis in isolated tissue constructs.
Prolonged HBO2 exposure may lead to adverse effects like vascular pruning.
Short-term HBO2 therapy can accelerate natural vascularization, achieving results faster.