Insights into Endothelin-3 and Multiple Sclerosis.

Endothelins are powerful vasoconstrictor peptides that play numerous other roles. Endothelin-1 (ET1) is the principal isoform produced by the endothelium in the human cardiovascular system. Endothelin-3 (ET3) and its rPptor affinity have been demonstrated to support neuronal repair mechanisms throughout life. In multiple sclerosis (MS), the role of vasoactive peptides are not well defined. Here we focus on ET3, specifically the plasma levels between MS patients and healthy subjects. Furthermore, we evaluated the changes in ET1 and ET3 plasma levels during different disease phases, the correlation between ET3 and cerebral circulation time, and the relationship between ET1 and ET3. In MS patients, the ET3 plasma levels were altered in a time-dependent manner. These results could support a putative role of ET3 in neuroprotection and/or neuroimmune modulation over time.

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