Sermorelin (GRF 1-29) is a synthetic 29-amino acid peptide that acts as an analogue of endogenous growth hormone-releasing hormone (GHRH). In cellular models, it binds to the GHRH receptor on pituitary somatotrophs, initiating a cyclic AMP (cAMP) signalling cascade. This pathway stimulates the transcription and secretion of growth hormone in vitro. To ensure precise laboratory results, researchers must follow strict reconstitution protocols using a Bacteriostatic Reconstitution Solution. During peptide synthesis, the 29-amino acid chain is carefully constructed to mimic the active binding domain of native GHRH. Maintaining optimal molecular stability is critical for consistent receptor binding assays. As a premium research chemical, UK laboratories utilise this peptide to investigate somatotropic signalling pathways and cellular metabolism. For a deeper understanding of these pathways, researchers can explore Advancing The Somatotropic Frontier A Comprehensive Analysis Of Ghrh Analogues Ghrelin Mimetics And Igf1 Signaling. Further molecular data can be reviewed on PubChem.
Public search data clusters around phrases like 'burn belly fat' and 'taking sermorelin' when discussing this peptide. Current literature investigates these concepts strictly through isolated cellular models and biochemical experiments. Published studies focus on receptor affinity rather than physical outcomes. Amino Peptides supplies Sermorelin (GRF 1-29) exclusively as a lyophilised laboratory reagent for controlled lab environments.
- Growth hormone-releasing hormone receptor (GHRHR), a class B G-protein coupled receptor (GPCR) located on anterior pituitary somatotroph membranes.
- Extracellular N-terminal domain of the GHRHR, serving as the primary binding site for the 29-amino-acid sequence.
- Intracellular G-alpha-s (Gαs) subunit, which undergoes conformational changes upon ligand-receptor interaction in cell-free environments.
- Activation of adenylyl cyclase following Gαs dissociation, leading to the rapid intracellular accumulation of cyclic AMP (cAMP) in isolated somatotroph models.
- cAMP-dependent activation of Protein Kinase A (PKA), which subsequently phosphorylates downstream transcription factors including CREB (cAMP response element-binding protein).
- Induction of calcium ion (Ca2+) influx via voltage-gated calcium channels, facilitating the exocytosis of secretory vesicles in cultured cellular systems.
- Upregulation of target gene transcription within the nucleus, observed during prolonged exposure in controlled laboratory experiments.
Technical Specifications
Variant Breakdown
- 2mg Vial: Ideal for preliminary receptor binding assays and short-term cell culture experiments.
- 5mg Vial: Suited for standard laboratory protocols requiring multiple dosing schedules across various cell lines.
- 10mg Vial: Designed for extensive, high-throughput screening and long-term in vitro studies.
Quality Assurance
- HPLC Analysis: Ensures a purity of >99%, verifying the absence of synthesis by-products and truncated sequences.
- Mass Spectrometry: Confirms the precise molecular weight of 3357.9 g/mol, validating the structural identity of the peptide.
- Lyophilisation: Processed into a stable, lyophilised solid to maximise shelf life and preserve molecular integrity before reconstitution.
- Endotoxin Testing: Rigorously screened to maintain endotoxin levels below 0.5 EU/mg, preventing cellular toxicity in delicate assays.
Research Mechanism
- Binds directly to the GHRH receptor on the surface of somatotroph cells in vitro.
- Activates the adenylate cyclase enzyme, leading to a rapid increase in intracellular cyclic AMP (cAMP).
- Triggers protein kinase A (PKA) pathways, which promote the transcription of specific target genes.
- Stimulates the release of stored growth hormone vesicles into the extracellular environment.
- Provides a controlled model for studying somatotropic axis regulation and cellular feedback loops.
Reconstitution & Storage Data
| Vial Strength | Solvent Added | Resulting Concentration |
| 2mg | 1 mL Bacteriostatic Reconstitution Solution | 2.00 mg/mL |
| 2mg | 2 mL Bacteriostatic Reconstitution Solution | 1.00 mg/mL |
| 5mg | 1 mL Bacteriostatic Reconstitution Solution | 5.00 mg/mL |
| 5mg | 2 mL Bacteriostatic Reconstitution Solution | 2.50 mg/mL |
| 10mg | 1 mL Bacteriostatic Reconstitution Solution | 10.00 mg/mL |
| 10mg | 2 mL Bacteriostatic Reconstitution Solution | 5.00 mg/mL |
- Lyophilised (Powder): Store in a standard refrigerator (2-8°C) for up to 3 months. For long-term preservation, freeze at -20°C.
- Reconstituted (Liquid): Store at 2-8°C (Refrigerated).
Scientific References
Journal of Endocrinology: "In vitro effects of GHRH analogues on somatotroph function and cAMP signalling" View Study
Peptides: "Receptor binding affinity of Sermorelin (GRF 1-29) in pituitary cell cultures" View Study
Molecular and Cellular Endocrinology: "cAMP signalling pathways activated by GHRH 1-29 in isolated somatotrophs" View Study
Biochemical Pharmacology: "Stability and degradation kinetics of synthetic GHRH peptides in aqueous solutions" View Study
Endocrine Research: "Transcriptional regulation of GH by GRF 1-29 in vitro: A mechanistic overview" View Study
