What are the different forms of apelin?

Apelin exists in multiple forms derived from the 77-AA preproapelin precursor: apelin-36 (C-terminal 36 AA), apelin-17, and apelin-13. [Pyr1]apelin-13 (with N-terminal pyroglutamate) is the most abundant and potent endogenous form. All forms bind the same APJ receptor but with varying affinities and pharmacokinetics.

Why is apelin of interest in heart failure?

Apelin is a positive inotrope that does not increase myocardial oxygen demand, unlike catecholamines. Plasma apelin levels are reduced in heart failure, suggesting a relative deficiency. Restoring apelin signaling could theoretically improve cardiac output without the adverse effects of catecholamine-based inotropes. However, this remains unproven in clinical trials.

Is there a connection between apelin and diabetes?

Apelin is expressed in adipose tissue and may play a role in insulin sensitivity and glucose metabolism. Some studies show altered apelin levels in type 2 diabetes and obesity, but the clinical significance is not established.

What is the recommended dose range for Apelin?

The research dose range is 30–300 pmol/kg/min ([Pyr1]apelin-13 in human research), administered via Intravenous infusion (research only), Continuous.

peptide dosing

Apelin Dosing & Reconstitution Guide

Complete dosing reference for Apelin (Cardiovascular / Vasoactive). Covers reconstitution, dose range, titration schedule, pharmacokinetics, and storage protocols for research use.

Dosing Protocol

Route: Intravenous infusion (research only) Frequency: Continuous Dose Range: 30–300 pmol/kg/min ([Pyr1]apelin-13 in human research)

Safety & Contraindications

Safety: No human safety data from controlled clinical trials Hypotension is the expected pharmacological effect and primary theoretical risk Potential effects on fluid balance due to vasopressin antagonism

Contraindications: Not approved for human use; no formal contraindication labeling exists; Theoretical risk of hypotension in hemodynamically unstable patients; Potential concern in conditions where vasopressin activity is beneficial (e.g., diabetes insipidus)

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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.