What Is Cortagen?
Cortagen is a synthetic tetrapeptide bioregulator (Ala-Glu-Asp-Arg) developed by Professor Vladimir Khavinson and the St. Petersburg Institute of Bioregulation and Gerontology as part of the systematic Khavinson bioregulator series. Cortagen is designed to selectively interact with gene regulatory elements in neurons and glial cells of the cerebral cortex, with the aim of modulating transcription pathways associated with neuronal survival, synaptic plasticity, and age-related neurodegeneration. It was developed by Prof. Vladimir Khavinson at the St. Petersburg Institute of Bioregulation and Gerontology.
Within the Khavinson framework, each tetrapeptide carries a unique amino acid sequence that confers DNA-binding specificity for a particular tissue type. Cortagen’s sequence Ala-Glu-Asp-Arg corresponds to the regulatory peptide fraction derived from cortical brain tissue extracts. It is distinct from Pinealon (which targets the pineal gland) and from nootropic peptides like Semax and Selank — functioning instead as a slow-acting geroprotective and neuroprotective bioregulator intended for multi-course use.
Cortagen is available for research use only and is not approved as a therapeutic drug in the United States or European Union.
Mechanism of Action
Cortagen’s proposed mechanism involves sequence-specific interaction between the tetrapeptide (Ala-Glu-Asp-Arg) and complementary DNA promoter regions in cortical neurons and glia. Khavinson’s group demonstrated that short peptide bioregulators of this class bind to di- and trinucleotide sequences in a manner consistent with minor groove DNA binding, altering chromatin accessibility and transcription factor recruitment at target gene loci.
In cortical tissue, Cortagen has been proposed to modulate expression of genes governing: (1) anti-apoptotic pathways (Bcl-2 family upregulation); (2) BDNF and NGF signaling, supporting dendritic arborization and synaptic maintenance; (3) antioxidant enzymes including SOD and catalase; and (4) mitochondrial biogenesis regulators that support neuronal energy homeostasis.
Unlike fast-acting neuroactive peptides that cross the blood-brain barrier acutely, Cortagen is injected peripherally (SubQ) and is thought to act through peripheral regulatory cascades rather than direct CNS penetration. Its effects are described as cumulative across multiple treatment courses.
Quick Reference
Member reference tables summarize the compound's research parameters.
Research Indications
Research Protocols
As reported in cited literature and research-community logs (see Research Citations below), not a personal dosing recommendation.
This member section describes parameters reported in the research literature.
Peptide Interactions
This member section summarizes reported compound interactions and evidence limitations.
Reported Research Time Points
This member section summarizes reported research time points.
Safety Notes
Included for harm-reduction awareness only, in the event this compound is encountered outside its labeled research use. Inclusion here does not imply RUO Codes endorses, recommends, or instructs human use.
This member section discusses research safety considerations and uncertainties.
Quality Indicators
Research Citations
- Gerontological Aspects of Genome Peptide Regulation
Khavinson VKh, Malinin VV. Karger: Basel, 2005. - Peptide regulation of gene expression in the human cerebral cortex neurons
Khavinson VKh, Linkova NS, Kvetnoy IM, et al. Bulletin of Experimental Biology and Medicine. 2012;154(1):88–91. - Effect of bioregulatory peptides on biological age in elderly subjects
Khavinson VKh, Anisimov SV, Zavarzina NY, et al. Neuroendocrinology Letters. 2001. - Peptide AEDR alters expression of genes regulating cortical neuron differentiation
Ashapkin VV, Kutueva LI, Vanyushin BF, Khavinson VKh. Biochemistry (Moscow). 2020;85(12). - Khavinson development attribution. Stored encyclopedia origin text.
Cortagen is a synthetic tetrapeptide bioregulator (Ala-Glu-Asp-Arg) developed by Professor Vladimir Khavinson and the St. Petersburg Institute of Bioregulation and Gerontology as part of the systematic Khavinson bioregulator series. Cortagen is designed to selectively interact with gene regulatory elements in neurons and glial cells of the cerebral cortex, with the aim of modulating transcription pathways associated with neuronal survival, synaptic plasticity, and age-related neurodegeneration.