Cortagen (Ala-Glu-Asp-Pro) is sold exclusively for laboratory research, analytical testing, and chemical reference purposes. It is NOT intended for human or veterinary consumption, diagnosis, treatment, or therapeutic application. All biological effects mentioned refer strictly to in vitro or animal model data.
Cortagen (Ala-Glu-Asp-Pro) – Epigenetic Modulation & Regenerative Gene Research
Cortagen (Ala-Glu-Asp-Pro) is a synthetic tetrapeptide (AGDP) belonging to the Khavinson bioregulatory peptide class. It was developed as a highly purified research analog of Cortexin, designed to investigate epigenetic regulation, chromatin structure, and gene expression in experimental systems.
Manufactured using solid-phase peptide synthesis (SPPS), Cortagen offers precise molecular definition, high reproducibility, and ≥98% purity (HPLC), making it suitable for advanced laboratory research and molecular biology studies, as commonly featured on peptide science platforms such as peptidesskin.com.
Technical Specifications
- Peptide Sequence: Ala-Glu-Asp-Pro (AGDP)
- CAS Number: 207923-38-0
- Molecular Formula: C17H26N4O9
- Molecular Weight: 430.41 g/mol
- Solubility: Water-soluble; saline compatible
- Purity: ≥98% (HPLC)
Mechanism of Action: Epigenetic Chromatin Modulation
Evidence level: preclinical (cellular and animal models)
Unlike receptor-mediated peptides, Cortagen is hypothesized to exert its activity through direct genomic interaction. Due to its low molecular weight, experimental data suggest nuclear accessibility, where the peptide may influence transcriptional regulation.
The Molecular Switch Hypothesis
Biophysical and molecular modeling studies indicate selective affinity for AACC nucleotide motifs within promoter regions. This interaction is proposed to facilitate chromatin deheterochromatinization, shifting DNA from condensed heterochromatin to transcriptionally active euchromatin.
This structural transition has been associated with reactivation of genes involved in ribosomal biogenesis, protein synthesis, and oxidative stress defense in senescent cellular models.
Neuroprotection and Oxidative Stress Regulation
Evidence level: animal models of ischemia and oxidative stress
In experimental brain injury models, Cortagen has been associated with reduced lipid peroxidation markers, including malondialdehyde (MDA), alongside normalization of endogenous antioxidant enzymes such as Superoxide Dismutase (SOD) and Glutathione Peroxidase.
Transcriptomic analyses further suggest modulation of genes related to neuronal metabolism, stress-response pathways, and synaptic maintenance. These findings remain confined to laboratory research contexts.
Peripheral Tissue and Nerve Regeneration Research
Evidence level: animal nerve injury models
Beyond CNS-focused studies, Cortagen demonstrates relevance in systemic regeneration research. Peripheral nerve injury models report increased axonal regeneration rates, accelerated remyelination, and shortened inflammatory phases.
Cardiac Transcriptome Modulation
Microarray studies indicate modulation of approximately 1.65% of the cardiac genome, including genes involved in membrane transport, cytoskeletal organization, and DNA replication.
Cortagen vs Cortexin – Research Comparison
| Feature | Cortagen (Synthetic) | Cortexin (Biologic Extract) |
|---|---|---|
| Composition | Single defined peptide (AGDP) | Complex protein mixture |
| Purity | ≥98% (HPLC) | Variable |
| Immunogenic Risk | Negligible | Potential |
| Standardization | Exact molar definition | Protein-weight based |
Conclusion
Cortagen (Ala-Glu-Asp-Pro) is a precision research peptide designed for the investigation of epigenetic regulation, chromatin remodeling, neurogenesis, and tissue regeneration. Its synthetic purity and molecular specificity make it a valuable tool for laboratory-based peptide research.
⚠️ Strictly for research use only. No therapeutic, diagnostic, or clinical conclusions should be inferred.
Frequently Asked Questions (Laboratory Use)
Can Cortagen be used in cell culture?
Yes. Suitable for in vitro research after dissolution in sterile water or PBS and filtration through a 0.22 µm membrane.
How should it be stored?
Lyophilized peptide: −20°C (long term). Reconstituted solutions: 4°C for up to 1–2 weeks.
How is purity verified?
Using HPLC (≥98%) with molecular identity confirmed by ESI-MS.