Big ET


Big Endothelin

Sample preparation

Centrifuge freshly collected blood as soon as possible
Store centrifuged samples at -20°C for longer storage.
Samples are stable up to 4 freeze and thaw cycles.
Hemolyzed or lipemic samples may cause erroneous results.

Reference values

Median (serum) = 0.09 pmol/l (n = 41)

Product name Big ET
Cat-Nr. BI-20082H
Range 0 – 3 pmol/l
Sensitivity 0.03 pmol/l (STD2 0.1 pmol/l)
Incubation time 3.5 hours
Sample volume 50 µl
Sample type

Serum, plasma



Tests 96
Method ELISA

Intended use

Intended use:

Big Endothelin-1 (BigET) is a peptide of 38 amino acids and is the precursor of Endothelin-1 (ET), represented by amino acids 1-21 ( ET is a potent vasoconstrictor and is produced by vascular endothelial cells. Accordingly it has a wide tissue distribution ( The cleavage of BigET by Endothelin Converting Enzyme (ECE) leads to ET and to a C-terminal fragment. Both BigET and ET are strong independent predictors of survival in patients with congestive heart failure, and identify a population with very high risk mortality. The half-life of ET (1-21) in plasma is less than one minute, whereas clearance of BigET is much slower. BigET can therefore be determined more easily.

Intended applications:

  • atherosclerosis
  • prognostic value in heart failure and acute myocardial infarction
  • renal insufficiency during and after graft rejection
  • pulmonary hypertension and scleroderma

Product informations