Side-by-Side Comparison · 2026

Apelin-13 vs Urocortin

Apelin-13 vs Urocortin — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Apelin-13
Cardiovascular Peptide

Apelin-13 is the most biologically active isoform of the apelin peptide family, endogenous ligands for the APJ receptor (also called APLNR). Apelin peptides are produced throughout the body, with the heart, lung, brain, and adipose tissue expressing particularly high levels....

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Urocortin
Cardiovascular Peptide

Urocortin 1 (UCN1) is a 40-amino acid peptide belonging to the corticotropin-releasing factor (CRF) family. While sharing structural homology with CRF, UCN1 binds with higher affinity to CRF receptor type 2 (CRFR2), which predominates in the heart, skeletal muscle, and peripheral...

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Key Parameters
Parameter Apelin-13 Urocortin
Category Cardiovascular Peptide Cardiovascular Peptide
Research Clinical Clinical
Half-Life < 5 min (plasma) 1-3 hours
Typical Dose 50-300 nmol/kg 0.5-10 pmol/kg/min (IV infusion)
Frequency Variable Acute infusion or short courses
Route Intravenous (research), Subcutaneous Intravenous, Subcutaneous
FDA Status Not approved Not approved

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Frequently Asked Questions
What is the difference between Apelin-13 and Urocortin?
Apelin-13: Apelin-13 is the most biologically active isoform of the apelin peptide family, endogenous ligands for the APJ receptor (also called APLNR). Apelin peptides are produced throughout the body, with the ... Urocortin: Urocortin 1 (UCN1) is a 40-amino acid peptide belonging to the corticotropin-releasing factor (CRF) family. While sharing structural homology with CRF, UCN1 binds with higher affinity to CRF receptor ...
Which has a longer half-life, Apelin-13 or Urocortin?
Apelin-13 half-life: < 5 min (plasma). Urocortin half-life: 1-3 hours.
Can you stack Apelin-13 and Urocortin?
Apelin-13 and Urocortin are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.