N-terminal prohormone brain natriuretic peptide (NT-proBNP)

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The N-terminal of the prohormone brain natriuretic peptide (NT-proBNP), also commonly abbreviated BNPT, is a 76 amino acid N-terminal inactive protein that is cleaved from proBNP to release brain natriuretic peptide. Both BNP and NT-proBNP levels in the blood are used for screening, diagnosis of acute congestive heart failure (CHF) and may be useful to establish prognosis in heart failure, as both markers are typically higher in patients with worse outcome.The plasma concentrations of both forms typically increase in patients with asymptomatic/symptomatic left ventricular dysfunction, which is associated with coronary artery disease and myocardial ischemia

Sample type

Recommended sample types are human EDTA plasma and serum. A range of additional sample types are compatible with the technology (PEA), including citrate plasma, heparin plasma, cerebrospinal fluid, (CSF), tissue and cell lysates, fine needle biopsis, microdialysis fluid, cell culture media, dried blood spots, synovial fluid, saliva, plaque extract and microvesicles. Please note that protein expression levels are expected to vary in different sample types. Certain assays are differentially affected by interfering substances such as hemolysate. Download any of our Data Validation documents or contact support@olink.com for more information.

NOTE: The calibrator curve below shows the performance of the assay with the estimated sensitivity and dynamic range parameters indicated. These curves are generated during the assay validation process using recombinant antigens. Please note that when analyzing biological samples the data generated will be given in the form of relative quantification (NPX values) and cannot be converted to absolute protein concentrations. For more info about NPX measurements, please visit our FAQ page.

Analytical Measuring Range

Please note: the technical data reported below refers to the measured value in the in vitro validation assays. Since the CVD III panel uses human samples diluted 100-fold, a multiplication factor of 100 should be applied when comparing the addressable biological concentration to this validation data.

    • LOD (pg/mL)
    • 3.8
    • LLOQ (pg/mL)
    • 7.6
    • ULOQ (pg/mL)
    • 15625
    • Hook (pg/mL)
    • 31250
    • Range (logs)
    • 3.3

Calibrator curve for validation data (generated in multiplex)

N-terminal prohormone brain natriuretic peptide (NT-proBNP)

Precision

    • Within run precision Coefficient of Variation (CV)
    • 11%
    • Between run precision Coefficient of Variation (CV)
    • 13%

Precision (repeatability) is calculated from linearized NPX values over LOD.

Biomarker Validation Data

Additional validation data, as well as a more detailed description of how the Olink panels are quality controlled can be found in our Data Validation documents. To download or to learn more go to the Data Validation page.

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