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 (n=32) = 14.5 pmol/l
Median EDTA plasma (n=33) = 15 pmol/l
Median heparin plasma (n=18) = 13.5 pmol/l
Median citrate plasma (n=18) = 12 pmol/l

Product name NT-proCNP
Cat-Nr. BI-20812
Range 0 – 128 pmol/l
Sensitivity 0.5 pmol/l (STD2 4 pmol/l)
Incubation time 20 min / 3 h / 30 min
Sample volume 20 μl
Sample type

Serum, plasma, urine, cell culture supernatant


Human. Cross-reacts with: mouse, rat, pig, monkey.

Cross reaction

homology to other species for the epitopes used in this assay:
Epitope 1: rat (88%), sheep (94%), pig (94%), mouse (88%), bovine (88%)
Epitope 2: rat (95%), sheep (90%), pig (95%), mouse (95%), bovine (90%)

Tests 96
Method ELISA

Intended use

Intended use:
C–type natriuretic peptide (CNP) is a paracrine growth factor widely expressed in tissues, including the vascular endothelium, where it is considered to provide vasoprotective functions. In endothelial cells and macrophages it is secreted in response to several stimuli, including inflammatory mediators. CNP is rapidly degraded in tissues and negligible quantities enter the circulation. However, the N-terminal portion of the pro-hormone is not degraded at source and circulates in significantly higher concentrations than CNP. Therefore NT-proCNP is a valuable biomarker to determine CNP synthesis in tissues. CNP plays a critical role in linear growth. It is produced in the growth plate and signals through a paracrine mechanism. Recent studies have shown that the plasma concentrations of NTproCNP correlate with linear growth velocity in all phases of skeletal growth and increase during rhGH therapy (1). Furthermore, serum NT-proCNP levels increased after initiation of GH treatment in patients with achondroplasia/ hypochondroplasia (2). Women with pregnancy complications, such as diminished fetal growth and pre-eclampsia show significantly increased NT-proCNP levels early in gestation (3, 4). NT-proCNP concentration at hospital admission has sufficient sensitivity and specificity to differentiate naturally occurring sepsis from non-septic systemic inflammatory response syndrome (SIRS) (5, 6). Recently, Prickett and colleages demonstrated in a cohort of over 2000 individuals, that in contrast to the close association of NT-proBNP with cardiac function, and predictive value for outcome after myocardial infarction, plasma NT-proCNP is highly correlated with renal function and is an independent predictor of mortality and cardiac readmission in individuals with unstable angina (7).
Intended applications:

  • Vascular diseasse
  • Growth
  • Skeletal development
  • Angiogenesis
  • Sepsis

Product informations