Related Experiment Videos
Molecular and physiological effects of nesiritide
1University of British Columbia, Vancouver, British Columbia.
The Canadian Journal of Cardiology
|July 17, 2008
Summary
Nesiritide, a recombinant human B-type natriuretic peptide (BNP), offers benefits beyond traditional treatments for acute decompensated heart failure (ADHF). Its unique pharmacological profile provides an additional therapeutic option for patients with ADHF.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Nesiritide is a recombinant human B-type natriuretic peptide (BNP) identical to endogenous BNP-32.
- BNP is secreted by cardiac myocytes in response to volume and pressure overload.
- Assays measure circulating BNP in acute decompensated heart failure (ADHF), but alternate forms may exist.
Purpose of the Study:
- To review the molecular and physiological effects of nesiritide in hospitalized patients with ADHF.
- To provide an overview of BNP structure and isoforms.
- To discuss the effects of recombinant human BNP.
Main Methods:
- Literature review of nesiritide's effects.
- Analysis of molecular structure and circulating isoforms of BNP.
- Discussion of physiological effects including vasodilatory, renal, neurohormonal, pulmonary, anti-inflammatory, and cardiac remodeling.
Main Results:
- Nesiritide demonstrates vasodilatory, renal, and anti-inflammatory effects.
- It antagonizes neurohormonal effects and impacts cardiac remodeling.
- These effects extend beyond traditional ADHF treatment goals.
Conclusions:
- Nesiritide offers benefits in ADHF treatment beyond reducing pulmonary capillary wedge pressure, preload, afterload, and dyspnea.
- Its unique pharmacological profile presents an additional treatment option for Canadian patients with ADHF.
Related Concept Videos
01:26Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
01:27Transducer Mechanism: Enzyme-Linked Receptors
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
01:15Impact of Pharmacokinetic–Pharmacodynamic Models: Regulatory Decisions
PK–PD modeling has significantly influenced FDA regulatory decisions, particularly drug approval, dosage optimization, and labeling. These models integrate pharmacokinetics (PK) and pharmacodynamics (PD) to predict drug behavior and effects, aiding in optimizing dosing regimens and enhancing the probability of clinical trial success.One notable example is Nesiritide (Natrecor®), a recombinant human brain natriuretic peptide for treating acute decompensated congestive heart failure (CHF).
01:18Treatment for Pulmonary Arterial Hypertension: Endothelin Receptor Antagonists
Endothelins (ETs) are potent vasoactive peptides critical in the human body's various physiological and pathological processes. One of the most promising therapeutic strategies for treating pulmonary arterial hypertension (PAH) involves counteracting the effects of these endothelins using a class of drugs known as endothelin receptor antagonists.
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme (ECE). Of...
ETs are synthesized through a complex sequence of enzymatic steps, primarily involving an enzyme referred to as endothelin-converting enzyme (ECE). Of...
01:21Skeletal Muscle Relaxants: Adverse Effects
Skeletal muscle relaxants are widely used for muscle paralysis and relieving pain following any muscle injury or stiffness. However, depending on the drug type, they can have adverse effects that range from mild to severe. Usually, nondepolarizing neuromuscular blockers have minimal side effects. For example, drugs like d-tubocurarine, cisatracurium, and rocuronium cause hypotension, whereas drugs like baclofen, when stopped abruptly, can lead to the recurrence of spastic conditions.
Unlike...
Unlike...
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...