Ala-Glu-Asp-Pro · Cortagen · Nervous System Bioregulator
A tetrapeptide bioregulator (Ala-Glu-Asp-Pro) developed by the St. Petersburg Institute of Bioregulation and Gerontology targeting the cerebral cortex and central nervous system. DISP provides neuroprotection, supports nerve regeneration, enhances cognitive function and demonstrates significant anti-aging effects on neural tissue — with 30+ years of Russian clinical research.
DISP (also known as Cortagen) is a short tetrapeptide bioregulator — Ala-Glu-Asp-Pro — developed by Professor Vladimir Khavinson and the St. Petersburg Institute of Bioregulation and Gerontology. Where other peptide bioregulators target specific organs (Pinealon for the pineal gland, Epithalon for the epiphysis), DISP specifically targets the cerebral cortex and central nervous system. It was developed as part of a comprehensive bioregulator system designed to restore optimal gene expression in tissues that degrade with age, stress or injury.
DISP operates through the same epigenetic mechanism common to all Khavinson bioregulators — the short peptide sequence penetrates cell nuclei and binds to specific DNA promoter regions, reactivating genes responsible for normal neural function that become silenced with aging. In the context of CNS tissue this means restoration of protein synthesis, synaptic maintenance, neurotransmitter regulation and neuroprotective gene expression. The result is improved baseline neural function rather than acute pharmacological stimulation — the distinction being that DISP restores capacity rather than forcing output.
DISP demonstrates significant neuroprotective activity in published research. It reduces oxidative stress in neural tissue, modulates inflammatory cytokine expression in the CNS and provides protection against ischemic damage. In animal studies it significantly reduced neuronal death following cerebral ischemia and improved functional recovery. These properties make it relevant not only for anti-aging and cognitive enhancement but for recovery from neurological insult including stroke, traumatic brain injury and hypoxic events.
In aged animal models DISP consistently improved performance in learning and memory tasks — Morris water maze, passive avoidance and other established cognitive benchmarks. The mechanism is distinct from acute nootropics like Semax (BDNF upregulation) or Dihexa (synaptogenesis) — DISP works at the level of restoring the underlying gene expression machinery that supports cognition rather than acutely amplifying existing pathways. This makes it particularly powerful when combined with more acute cognitive peptides, providing a restored foundation for them to act on.
DISP has demonstrated peripheral nerve regeneration properties in published research — accelerating functional recovery in peripheral neuropathy models. This extends its application beyond pure cognitive enhancement to nerve damage repair, making it relevant for diabetic neuropathy, post-surgical nerve recovery and other conditions involving peripheral neural damage.
DISP follows the standard Russian bioregulator protocol — 10 days on, 1–2 times per year. Standard dose is 1mg per day SubQ or oral. Best combined with Pinealon for a comprehensive CNS + pineal bioregulator course. Administer SubQ for most reliable absorption. Can be stacked with Semax and Selank without conflict — the mechanisms are complementary rather than overlapping.