title: Endothelin-1 plasma levels in cluster headache.
abstract: OBJECTIVE
  A role for endothelin-1, a potent vasoconstrictor peptide, in some cerebrovascular diseases has been proposed. To obtain preliminary data about peripheral concentrations of endothelin-1 in acute cluster headache, we measured the plasma endothelin-1 secretory pattern in 10 men with cluster during and independent of a headache attack.
  
  
  METHODS
  We collected blood samples for plasma endothelin-1 determinations at 0, 15, 30, 45, 60, 90, and 120 minutes during a cluster attack and closely monitored blood pressures. We repeated the same sampling during an asymptomatic period.
  
  
  RESULTS
  The mean values of plasma endothelin-1 (before a cluster headache, 3.3 +/- 0.3 pg/mL) significantly increased (F = 2.578, P < .05) during an attack, reaching their peak at 30 minutes (5.0 +/- 0.5 pg/mL, P < .05). We found no significant variations in mean arterial pressure.
  
  
  CONCLUSIONS
  Endothelin-1 may play a role in the pathophysiology of cluster attacks. The increase in plasma observed during cluster attacks may be linked to alterations in systemic hemodynamics and vascular tone.
authors: Division of Internal Medicine II, Department of Internal Medicine, University of Genoa, Italy.
authors: R
authors: R
authors: Franceschini
authors: G L
authors: GL
authors: Tenconi
authors: M
authors: M
authors: Leandri
authors: F
authors: F
authors: Zoppoli
authors: A
authors: A
authors: Gonella
authors: S
authors: S
authors: Staltari
authors: T
authors: T
authors: Barreca
mesh_terms: D000328:Adult; D003027:Cluster Headache / Q000097:blood*; D019333:Endothelin-2 / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009994:Osmolar Concentration; D012016:Reference Values; D013997:Time Factors
chemical_list: D019333:Endothelin-2