Peptable

Comparison

Hexarelin vs Selank

Function

While Hexarelin is investigated for effects on GH secretion, cardiac protection, and muscle metabolism, with higher GH secretory potency than earlier GHRPs1929, Selank is a peptide developed in Russia as an anxiolytic and nootropic; in animal models it reduces anxiety-like behavior and modulates immune parameters under stress39.

Mechanism

While Hexarelin works as a potent synthetic hexapeptide (examorelin) that agonizes GHSR-1a to stimulate GH release and also binds CD36, influencing cardiovascular and metabolic pathways19212996, Selank is a synthetic heptapeptide, Thr-Lys-Pro-Arg-Pro-Gly-Pro, that combines a tuftsin fragment with a Pro-Gly-Pro motif and is reported to modulate GABAergic neurotransmission and cytokine balance while being resistant to proteolytic degradation39.

Receptor

Hexarelin

Primary: GHSR-1a (ghrelin receptor); also binds the scavenger receptor CD36 in vascular and macrophage tissues192129

Selank

Not clearly established in the current dataset.

Organism or Origin

Hexarelin

Fully synthetic growth hormone secretagogue29

Selank

Synthetic analog of the IgG-derived tetrapeptide tuftsin39

Gene

Hexarelin

GHSR

Selank

Not assigned in the current dataset.

Summary

Hexarelin and Selank are noticeably different, with limited direct overlap in their usual biological context. Their typical research and application settings separate fairly clearly: Hexarelin is more often discussed in the realm of Metabolic and endocrine and Cardiovascular health, whereas Selank is more often associated with the realm of Neurology and brain health and Immunology and inflammation. They also influence different molecular systems, with Hexarelin tracking more closely to Ghrelin receptor while Selank centers more on GPCR receptor. Hexarelin has a more synthetic design origin, while Selank is closer to synthetic analog background with Hexarelin in Preclinical development and Selank approved for Research use only. Hexarelin incorporates d-amino acid substitution and amidation features that are not part of Selank, while their sequence patterns also diverge, with Hexarelin showing protein-mimetic sequence features and Selank showing proline-rich features.

Related articles

No related articles are linked to these peptides yet.

Sources

19Identification of the growth hormone-releasing peptide binding site ..., https://pmc.ncbi.nlm.nih.gov/articles/PMC1133797/
21Hexarelin Peptide | Strength & Recovery - Paragon Sports Medicine, https://www.paragonsportsmedicine.com/peptides/hexarelin
29Examorelin - Wikipedia, https://en.wikipedia.org/wiki/Examorelin
96Growth Hormone Secretagogue Receptor - ScienceDirect.com, https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/growth-hormone-secretagogue-receptor
39Application of thr-lys-pro-arg-pro-gly-pro peptide (selank) for ..., https://patents.google.com/patent/RU2629832C1/en