CRF-family neuropeptide
Urocortin-1
Urocortin-1 is a neuropeptide in the corticotropin-releasing factor family. Initial publications call it urocortin; that historical name should not be extended to other numbered family members.
This is a research reference, not a product offered in the Asciende catalog. Published studies do not establish the identity, purity or availability of a commercial preparation.
Local signaling and experimental context
Record where and how the measurement was made. Presence of a peptide in a system does not establish that a commercial preparation reproduces that system.
- Does the work study an isolated molecule, endogenous secretion or a preparation containing several components?
- Are tissue, species and response measurement specified?
- Does the interpretation distinguish signal detection from demonstration of its function in that model?
Mechanism described in the literature
In vitro studies with experimentally expressed receptors found urocortin activity at CRF type 1 and type 2 receptors. The foundational investigation also examined hormone secretion and neuronal activity markers in preclinical models.
Other names in the literature
- Urocortin
- Urocortin 1
- UCN1
A family does not imply one receptor profile
The 1995 work combined localization in rat brain, cloning and pharmacological comparison. Urocortin and CRF did not show the same relative profile at the type 2 receptor. Comparative affinity and cellular responses provided complementary evidence for proposing a ligand-receptor relationship (PMID 7477349).
Local expression in cardiac cells
A 1998 publication sought urocortin RNA in a cell line and primary rat cardiac myocyte cultures. Molecular analysis verified the amplified product's identity. Transcript detection supported local expression but did not replace the separately performed functional experiment (PMID 9639256).
What a hypoxia response in culture means
In vitro, the peptide was associated with less cell death during hypoxia in those myocytes. This outcome concerns cultured cells; it does not measure cardiac pumping or whole-organ performance. Separating expression, viability and organ function prevents a cellular result from becoming a general cardiovascular conclusion.
Questions and answers
Does RNA detection alone demonstrate a functional response?
No. The cardiac study investigated expression and hypoxia response through different measurements.
Are urocortin-1 and CRF the same compound?
No. The foundational article compared related ligands with distinct experimental profiles.
Sources
- Urocortin, a mammalian neuropeptide related to fish urotensin I and to corticotropin-releasing factor. — Nature, 1995
- Urocortin, a mammalian neuropeptide related to fish urotensin I and to corticotropin-releasing factor.
- Expression and protective effects of urocortin in cardiac myocytes. — Neuropeptides, 1998
- Expression and protective effects of urocortin in cardiac myocytes.