Endothelin: A Potential Universal Systemic Biomarker

Area of Science:

• Vascular Biology
• Biomarker Discovery
• Physiology

Background:

• Endothelins are potent vasoconstrictive peptides synthesized by endothelial cells.
• They play a crucial role in regulating vascular tone, blood pressure, and tissue perfusion.

Purpose of the Study:

• To evaluate plasma Endothelin-1 (ET-1) levels as a diagnostic marker.
• To assess ET-1's role in disease burden and progression due to its vascular effects.

Main Methods:

• Systematic review of studies over the past 30 years across various organ systems.
• Statistical analysis to identify patterns and correlations in ET-1 levels.

Main Results:

• Plasma ET-1 is elevated in arterial/pulmonary hypertension, heart failure, autoimmune diseases, chronic kidney disease, and liver failure.
• ET-1 levels were at least double the normal concentration in these conditions, irrespective of the underlying disease.
• Plasma ET-1 levels increased with disease severity, though not always linearly.

Conclusions:

• Endothelin-1 shows a consistent increase across diverse pathological conditions.
• Plasma ET-1 emerges as a potential biomarker for overall human physiological status.