Cortagen (20mg) Research Peptide: An AEDP Tetrapeptide Bioregulator for Neuroprotection & Epigenetic Studies

If your research investigates the epigenetic regulation of gene expression, neuronal repair, or the molecular mechanisms underlying cognitive decline and cellular aging, Cortagen (20mg) research peptide — also known as the tetrapeptide AEDP (Ala‑Glu‑Asp‑Pro) — offers a precisely defined synthetic tool with a growing body of scientific literature. Cortagen is a synthetic tetrapeptide bioregulator developed by Professor Vladimir Khavinson at the St. Petersburg Institute of Bioregulation and Gerontology. Originally designed based on amino acid analysis of the natural brain cortex peptide preparation Cortexin, Cortagen is classified among the Khavinson peptides — a family of short peptide bioregulators that are proposed to modulate endogenous regulatory systems by interacting directly with DNA and chromatin structures.

Research demonstrates that Cortagen induces deheterochromatinisation (unrolling of condensed chromatin), thereby potentially restoring the expression of genes that become silenced with age. It has shown pronounced effects upon the structural and functional posttraumatic recovery of peripheral nerve tissue, with studies showing 27-40% increases in nerve fibre growth rate and conduction velocity. Cortagen also modulates gene expression in the heart and maintains antioxidant activity in brain tissues. This makes Cortagen (20mg) research peptide a valuable tool for laboratories investigating epigenetics, neurobiology, neuroprotection, and the biology of aging.

At Chinese Grey Peptides, we supply high‑purity Cortagen (20mg) research peptide to research institutions and wholesale buyers across the United Kingdom, France, Germany, Spain, Sweden, Italy, and the USA. Every batch is lyophilised, HPLC‑verified to ≥99% purity, and accompanied by a Certificate of Analysis (COA), ensuring your investigations into epigenetic regulation, neuroprotection, and cellular aging begin with uncompromising quality.

What Is Cortagen and How Does It Work?

To fully appreciate the research potential of Cortagen (20mg) research peptide, it is essential to understand its biochemical identity and the mechanisms by which it exerts its effects.

The AEDP Tetrapeptide

Cortagen is a synthetic tetrapeptide consisting of four amino acids: alanine, glutamic acid, aspartic acid, and proline — the sequence Ala‑Glu‑Asp‑Pro (AEDP). Its molecular formula is C₁₇H₂₆N₄O₉, and its molecular weight is approximately 430.17‑430.41 g/mol. The peptide belongs to the Khavinson family of short peptide bioregulators — molecules hypothesised to penetrate cells, reach the nucleus, and interact with DNA and chromatin to modulate gene expression in a tissue‑specific manner.

Mechanism of Action: Epigenetic Modulation and Chromatin Remodelling

The biological activity of Cortagen (20mg) research peptide is thought to be mediated through epigenetic interactions with chromatin:

Chromatin Decondensation (Deheterochromatinisation)

Research by Lezhava et al. has demonstrated that Cortagen induces unrolling deheterochromatinisation (decondensation) of total heterochromatin in aged cell cultures. This process involves the partial unfolding of higher‑order chromatin structures, such as 30‑nm fibres, into more relaxed conformations, potentially making previously repressed genes more accessible for transcription. Importantly, this effect is selective — Cortagen causes deheterochromatinisation of facultative heterochromatin while preserving the structural integrity of pericentromeric heterochromatin.

Activation of Ribosomal Genes and Protein Synthesis

Following chromatin decondensation, ribosomal gene clusters become more transcriptionally active, as evidenced by increased synthetic processes of ribosomal genes. This activation may support protein synthesis capacity, particularly relevant in aged cells where the ability to synthesise proteins often declines.

Gene Expression Modulation

Microarray analysis has revealed that Cortagen significantly alters gene expression in the mouse heart, with both common and specific effects on gene expression. It has also been shown to modulate the expression of IL‑2 mRNA in hypothalamic structures and stimulate the growth of explants from the brain cortex and subcortical structures.

Reduction of Oxidative Stress

Cortagen decreases the content of lipid peroxidation products and reduces oxidative modification of proteins in the cerebral cortex. This suggests a role in modulating oxidative stress and maintaining cellular redox balance.

Key Research Applications for Cortagen (20mg)

Cortagen (20mg) research peptide is a versatile tool with applications spanning several domains of biomedical research.

1. Epigenetic & Chromatin Research

As a peptide that induces chromatin decondensation, Cortagen is a valuable tool for studying epigenetic regulation. Research applications include:

• Chromatin Dynamics: Investigating how short peptides can remodel higher‑order chromatin structures and influence gene accessibility

• Heterochromatin Decondensation: Studying the unrolling of facultative heterochromatin and its impact on gene expression

• Ribosomal Gene Activation: Exploring how chromatin remodelling activates synthetic processes of ribosomal genes

• Epigenetic Rejuvenation: Investigating the potential of Cortagen to restore the expression of genes silenced by age‑related chromatin condensation

2. Neuroprotection & Nerve Regeneration Research

Cortagen has demonstrated pronounced effects on the structural and functional posttraumatic recovery of peripheral nerve tissue. Research applications include:

• Nerve Regeneration Studies: Cortagen increased the length of the nerve segment able to conduct impulses by 27% and improved conduction velocity by 40% compared to placebo

• Neuroprotection: Cortagen activates neurons and maintains antioxidant activity in brain tissues

• Cerebral Ischemia Models: Studies show Cortagen accelerated behavioural recovery following cerebral ischemia

• Neurodegenerative Models: Cortagen has demonstrated therapeutic activity in Drosophila models for neurodegenerative disorders

• Peripheral Nerve Injury: Research on the delayed effect of cortagen on the restoration of injured nerve function is documented in PubMed

3. Gene Expression & Transcriptional Regulation

Cortagen serves as a model for studying how short peptides interact with chromatin and modulate gene expression. Research applications include:

• Gene Expression Profiling: Microarray analysis has revealed Cortagen modulates gene expression in the mouse heart

• IL‑2 Gene Modulation: Cortagen modulates IL‑2 mRNA expression in hypothalamic structures

• In Vitro Gene Regulation: Cortagen activates IL‑2 mRNA synthesis in splenocytes

• Tissue‑Specific Effects: Studying the tissue‑specific actions of Cortagen in brain cortex and subcortical structures

4. Aging & Gerontology Research

Cortagen is being investigated for its potential to address aging‑related molecular changes:

• Age‑Related Chromatin Changes: Studying how Cortagen may reverse age‑associated chromatin condensation and restore gene expression

• Cellular Senescence: Investigating the peptide’s effects on aged cell cultures

• Epigenetic Regulation of Aged Heterochromatin: Cortagen induces remodelling effects on facultative heterochromatin in aging and aging pathologies

5. Oxidative Stress & Antioxidant Research

Cortagen has been studied for its potential to modulate oxidative stress:

• Lipid Peroxidation: Cortagen decreased the content of LPO products in rat serum and cerebral cortex

• Protein Oxidation: Reduced oxidative modification of proteins in the cerebral cortex

• Free‑Radical Processes: Cortagen modulates free‑radical processes through its antioxidant activity

Chemical & Physical Specifications for Cortagen (20mg)

Accurate characterisation of Cortagen (20mg) research peptide is essential for reproducible experimental design.

Note: The 20 mg mass refers to the weight of the peptide in its lyophilised form. Cortagen is a Khavinson tetrapeptide bioregulator derived from the natural brain cortex peptide preparation Cortexin. The peptide is for research use only (RUO). Not for human consumption. Cortagen is not FDA‑approved for therapeutic use.

Reconstitution & Handling Protocol for Cortagen (20mg)

Proper reconstitution of Cortagen (20mg) research peptide is critical for maintaining its structural integrity and biological activity.

Step 1 – Preparation

• Bring the sealed Cortagen vial and your chosen diluent (sterile bacteriostatic water or sterile PBS, pH 5‑7) to room temperature. Condensation can degrade the lyophilised powder.

• Clean your work surface with 70% ethanol and lay out sterile syringes, alcohol wipes and a clean work mat.

Step 2 – Vial Sanitisation

• Wipe the rubber stopper of the Cortagen vial with a fresh 70% ethanol wipe. Allow the alcohol to evaporate completely before piercing.

Step 3 – Reconstitution

• Draw your desired volume of diluent into a sterile syringe. A common starting concentration for research applications is 20 mg per 2 mL of diluent, yielding a 10 mg/mL stock solution.

• Insert the needle and slowly inject the diluent against the inner glass wall. Do not spray directly onto the lyophilised powder.

• Gently swirl the vial until the solution is clear and fully dissolved. Do not shake vigorously, as shaking can cause denaturation.

Step 4 – Aliquoting & Storage

• Immediately after dissolution, aliquot the reconstituted Cortagen into single‑use sterile vials.

• Store aliquots at –20°C. Avoid repeated freeze‑thaw cycles, as peptides are susceptible to degradation.

• Once thawed, store at 2‑8°C and use within a short period.

Concentration Reference Table for Cortagen (20mg)

Adjust diluent volume based on your experimental requirements. For cell culture applications, typical working concentrations may range from 0.1‑10 µM. Research doses in animal studies typically range from 10‑20 mg daily for 10‑20 consecutive days per cycle.

Storage & Stability Guidelines for Cortagen (20mg)

Why Choose Chinese Grey Peptides for Cortagen (20mg)?

As an authentic licensed peptide supplier based in the USA, we supply Cortagen (20mg) research peptide and a wide range of research‑grade compounds under rigorous quality assurance protocols, fully aligned with Google’s E‑E‑A‑T standards (Experience, Expertise, Authoritativeness, Trustworthiness).

• Verified Purity: Independent HPLC analysis with purity guaranteed ≥99% for every batch

• GMP‑Compliant Manufacturing: All peptides are synthesised under strict quality control conditions

• Full Traceability: Batch‑specific Certificates of Analysis (COA) are available for every order

• Wholesale Supply: We serve research institutions, laboratories, and wholesale buyers across the UK, EU, and USA with flexible volume pricing and reliable logistics

• USA‑Based Regulatory Compliance: All products are supplied strictly as research‑grade chemicals for laboratory use only (RUO). Cortagen is not FDA‑approved for therapeutic use.

Researchers across the United States—including those at leading institutions—trust us for fast domestic delivery, transparent documentation and professional technical support.

FAQ: Cortagen (20mg) Research Peptide

 What is Cortagen (20mg) research peptide?
Cortagen is a synthetic tetrapeptide (Ala‑Glu‑Asp‑Pro, AEDP) belonging to the Khavinson family of peptide bioregulators. Originally designed based on amino acid analysis of the natural brain cortex peptide preparation Cortexin, it is used in research to study epigenetic regulation, neuroprotection, and cellular aging.

What is the sequence and molecular weight of Cortagen?
The sequence is Ala‑Glu‑Asp‑Pro (AEDP). Its molecular formula is C₁₇H₂₆N₄O₉, and its molecular weight is approximately 430.17‑430.41 g/mol.

 What are the primary research applications for Cortagen?
Cortagen is used in epigenetic and chromatin research (deheterochromatinisation, ribosomal gene activation), neuroprotection and nerve regeneration studies (27‑40% increases in nerve fibre growth), gene expression and transcriptional regulation research, aging and gerontology studies, and oxidative stress and antioxidant research.

 What is the proposed mechanism of action of Cortagen?
Cortagen is hypothesised to induce deheterochromatinisation (unrolling of condensed chromatin), making previously repressed genes more accessible for transcription. It activates ribosomal gene synthesis, modulates gene expression (including IL‑2 mRNA), and reduces oxidative stress by decreasing lipid peroxidation products and oxidative modification of proteins.

 What evidence supports Cortagen’s neuroprotective effects?
Cortagen increased the length of the nerve segment able to conduct impulses by 27% and improved conduction velocity by 40% compared to placebo. It has demonstrated pronounced effects on the structural and functional posttraumatic recovery of peripheral nerve tissue and accelerated behavioural recovery following cerebral ischemia.

 What purity does your Cortagen (20mg) meet?
Our Cortagen is tested to ≥99% purity by HPLC. A Certificate of Analysis (COA) is supplied with every order.

How should I reconstitute Cortagen (20mg)?
Reconstitute with sterile bacteriostatic water or sterile PBS (pH 5‑7). Allow the vial to reach room temperature, then slowly inject the diluent against the inner glass wall and swirl gently. Do not shake. A typical starting concentration is 10 mg/mL.

How should I store reconstituted Cortagen?
Reconstituted Cortagen should be stored at 2‑8°C for short‑term use. For longer storage, aliquot immediately into single‑use vials and store at –20°C for up to 3 months. Avoid repeated freeze‑thaw cycles.

 Is Cortagen research peptide legal to purchase in the USA?
Yes. Cortagen is a laboratory reagent sold for research use only (RUO). It is fully legal to purchase, possess, and use in the United States for legitimate in‑vitro or in‑vivo scientific research, provided it is not marketed with therapeutic claims. Note: Cortagen is not FDA‑approved for therapeutic use and has not been evaluated by any Western regulatory agency.

Does Chinese Grey Peptides ship internationally?
Yes. We ship across the UK, Europe (France, Germany, Spain, Sweden, Italy), and the USA from our US warehouse. Wholesale pricing is available for bulk orders.

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• PubMed Cortagen / AEDP reference
• PubMed Cortagen chromatin / peptide bioregulator reference
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Important Compliance Notice

Cortagen 20mg may be regulated differently depending on the country, product type, labeling, intended use, buyer type, and destination. Chinese Grey Peptides does not provide medical advice, dosing instructions, injection guidance, brain-health claims, cognitive claims, neuroprotective claims, nerve-repair claims, immune claims, anti-aging claims, disease claims, treatment claims, or personal-use recommendations.

Customers are responsible for understanding and following all local laws, import rules, prescription requirements, compounding rules, labeling rules, advertising rules, sport-governing rules, and permitted-use requirements before ordering.

From its design as a synthetic analogue of natural cortical peptides to its well‑characterised role in inducing chromatin decondensation and modulating gene expression, Cortagen (20mg) research peptide provides a precisely defined and increasingly valuable platform for advanced epigenetic and neurobiological research. Its ability to decondense heterochromatin, potentially restore age‑silenced genes, promote nerve regeneration (27‑40% increases in nerve fibre growth), and modulate oxidative stress—supported by peer‑reviewed research published in PubMed and other authoritative journals—makes it a valuable addition to any laboratory investigating epigenetics, neuroprotection, or the molecular biology of aging. By choosing high‑purity, lab‑verified Cortagen (20mg) research peptide from Chinese Grey Peptides, you ensure that your research is built on a foundation of quality, reproducibility, and scientific integrity.

Ready to advance your research with Cortagen (20mg)? Browse our product catalogue, request a wholesale quote, or contact our support team today to discuss your laboratory’s specific needs. Place your order now and receive GMP‑grade Cortagen delivered directly to your facility in the USA, UK, or Europe.