What is the difference between BNP and NT-proBNP?

BNP (32 AA, half-life ~20 min) is the biologically active hormone that binds NPR-A. NT-proBNP (76 AA, half-life ~120 min) is the inactive N-terminal fragment released in equimolar amounts during proBNP processing. Both are used as biomarkers, but they have different cutoff values and kinetics. NT-proBNP is preferred when monitoring patients on sacubitril-valsartan because neprilysin inhibition raises BNP but not NT-proBNP.

What BNP level indicates heart failure?

BNP 400 pg/mL strongly suggests heart failure. For NT-proBNP, age-stratified cutoffs apply: 450 (age 900 (age 50-75), or >1800 pg/mL (age >75) suggest HF (ESC guidelines).

Why was BNP originally called "brain natriuretic peptide"?

BNP was first identified in porcine brain tissue by Sudoh et al. in 1988. It was subsequently found to be produced primarily by cardiac ventricles, not the brain. The name "brain natriuretic peptide" persists historically, though "B-type natriuretic peptide" is now preferred.

What is the recommended dose range for B-type Natriuretic Peptide?

The research dose range is N/A, administered via N/A (diagnostic biomarker), N/A.

peptide dosing

B-type Natriuretic Peptide Dosing & Reconstitution Guide

Complete dosing reference for B-type Natriuretic Peptide (Cardiovascular / Natriuretic). Covers reconstitution, dose range, titration schedule, pharmacokinetics, and storage protocols for research use.

Dosing Protocol

Route: N/A (diagnostic biomarker) Frequency: N/A Dose Range: N/A

Safety & Contraindications

Safety: Endogenous BNP is a normal physiological hormone with no inherent toxicity As a biomarker test, BNP/NT-proBNP assays carry no direct safety risks Exogenous recombinant BNP (nesiritide) safety profile includes hypotension and potential renal effects (see nesiritide entry)

Contraindications: No contraindications for BNP as a biomarker assay; For recombinant BNP (nesiritide) therapeutic use, see nesiritide entry; BNP interpretation requires clinical context: elevated in renal failure, sepsis, pulmonary embolism, and other non-HF conditions

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Research Use Only. The information on this page is compiled from published research literature and is provided for educational purposes only. It does not constitute medical advice. All compounds referenced are intended for in vitro research use by qualified laboratories and institutions.