3AA Preclinical / Limited Human
Pinealon
Synthetic tripeptide brain bioregulator (Glu-Asp-Arg) from the Khavinson school, studied for neuroprotection, antioxidant gene upregulation, and circadian rhythm support.
In Plain English:
Pinealon is a three-amino-acid synthetic peptide — glutamic acid, aspartic acid, arginine (EDR) — developed by Vladimir Khavinson at the St. Petersburg Institute of Bioregulation and Gerontology as the active synthetic equivalent of neuropeptide fractions found in Cortexin (a bovine brain-cortex extract). Unlike most peptides, its low molecular weight (418 Da) allows it to cross cell and nuclear membranes via the PEPT2 transporter and potentially interact directly with DNA promoter regions, upregulating antioxidant enzymes (SOD2, GPX1) and reducing pro-apoptotic proteins (caspase-3, p53). Animal studies show protection against hypoxia, prenatal hyperhomocysteinemia-induced cognitive deficits, and dendritic spine loss in Alzheimer's models. The main published human data comes from a Russian clinical series: 72 traumatic brain injury patients taking oral Pinealon showed improved memory, reduced headache duration and intensity, and enhanced information-processing speed. All published research originates from the Khavinson group; no independent replication or Western-regulated clinical trials exist.
Research Maturity
Preclinical / Limited Human (~20-30 peer-reviewed papers (2008-2024), mostly in vitro/rodent; 1 human series (TBI N=72); no independent replication+ Studies)
Focus
Cellular Stress Response
Healthy Aging
Neuroprotection
Origin
Synthesised as the putative active tripeptide of Cortexin (bovine brain cortex polypeptide extract). Developed by V.K. Khavinson and colleagues at the Saint Petersburg Institute of Bioregulation and Gerontology, Russia. Also referred to as T-33 peptide and EDR peptide. Classified as a Cytogen (synthetic peptide bioregulator), distinct from naturally-derived Cytomax preparations.
Mechanism
Crosses lipid bilayers and nuclear membranes via PEPT2 transporter (MW 418 Da enables passage); binds DNA promoter regions in the major groove, favouring heterochromatin-to-euchromatin transition; upregulates SOD2 (superoxide dismutase 2) and GPX1 (glutathione peroxidase 1) mRNA and enzyme activity; delays ERK1/2 (MAPK) activation, extending neuronal response window to oxidative stress from ~2.5 min to ~20 min; reduces caspase-3 and p53 expression, attenuating apoptosis; activates PPARA and PPARG nuclear receptor transcription; stimulates serotonin synthesis via tryptophan hydroxylase (TPH1) upregulation; modulates FNDC5 expression to increase irisin, which supports telomere maintenance; interacts with calmodulin to regulate synaptic neurotransmitter release.
Outcome
Reactive oxygen species (ROS) level in cerebellar granule cells, neutrophils, PC12 cells; necrotic cell death (propidium iodide test); ERK1/2 activation timing; SOD2/GPX1 enzyme activity in brain tissue; caspase-3 activity in aged rat neurons; dendritic mushroom-spine density in hippocampal AD cultures; memory and headache severity in TBI patients (n=72); learning time in macaque models; sleep quality and circadian rhythm parameters in aged rats.
