Study Overview
Description: This systematic review examines how Photobiomodulation (PBM) therapy affects the vascular endothelial glycocalyx (eGC)—a delicate, protective layer lining the interior of blood vessels.
Source: PubMed
Summary
Background
The eGC acts as a "non-stick" protective coating for blood vessels, regulating permeability, preventing blood clots, and modulating inflammation. Damage to this layer is a hallmark of conditions like diabetes, sepsis, and heart disease. This review evaluates PBM's ability to shield or restore this barrier.
Mechanisms of Action
PBM interacts with cellular chromophores to trigger biological responses that benefit the eGC:
- Inhibiting Shedding: It reduces the activity of enzymes that break down glycocalyx components (like hyaluronic acid).
- Antioxidant Support: It lowers oxidative stress, which is a major driver of glycocalyx degradation.
- Synthesis Promotion: It may stimulate endothelial cells to produce new glycocalyx molecules.
Key Findings
- Protective Effects: The majority of reviewed studies indicate that PBM effectively mitigates glycocalyx loss caused by ischemia-reperfusion injury, inflammation, or high glucose levels.
- Microcirculation Improvement: By preserving the eGC, PBM improves microvascular blood flow and prevents excessive leukocyte adhesion (lowering the inflammatory response).
Conclusion
PBM therapy shows significant potential as a non-invasive tool for vascular endothelial protection. Preserving the integrity of the glycocalyx may be a primary mechanism by which PBM aids in treating cardiovascular and inflammatory diseases.
