Pinealon

Pinealon is a tripeptide with the sequence Glu-Asp-Arg, often shortened to EDR in the literature. It belongs to the family of short peptides that Vladimir Khavinson and his team at the Institute of Bioregulation and Gerontology in St. Petersburg have described over several decades. In preclinical work these peptides show tissue-specific effects; for Pinealon the focus is on nerve cells, and it is also linked to the pineal gland axis.

The central hypothesis of the Khavinson group runs like this: peptides of this length reach the cell nucleus, attach to particular DNA stretches or histones and thereby alter gene expression. Internationally this epigenetic model is disputed; in Russian and Eastern European laboratories it has been examined in a series of preclinical studies.

Findings from cell and animal models:

• In cerebellar granule cells, in neutrophils and in PC12 cells, Pinealon dose-dependently limited the build-up of reactive oxygen species under oxidative stress and lowered necrotic cell death.
• Effects on antioxidant enzymes and on the survival of dendritic spines have been described in cell and animal models.
• In neurons generated from fibroblasts of elderly donors, EDR promoted branching of the dendritic tree and reduced oxidative DNA damage; mitochondrial activity and the ageing marker p16 stayed unchanged.
• In ageing models the peptide is linked to less age-related loss of nerve cells, alongside effects on the behaviour of test animals.

Anyone placing the substance should keep the origin of the data in mind: the evidence is preclinical and comes largely from a single research tradition.

Short Khavinson peptides are rated remarkably well tolerated in the available literature, and Pinealon is no exception. What you should still keep in mind:

• Injection site: mild redness or a feeling of pressure is the most common observation with peptides given under the skin.
• Mild profile: in animal models, even high doses have been described without notable toxic effects.
• Disputed mechanism: that a tripeptide binds DNA and steers genes is not accepted internationally, so how the observed effects arise remains open.
• Data base: the studies come almost exclusively from Russian and Eastern European laboratories, and robust long-term human data are missing.

This summary is no substitute for medical advice.

• Pinealon increases cell viability by suppression of free radical levels and activating proliferative processes - cell study on reactive oxygen species and cell death under oxidative stress in three cell types.
• EDR Peptide: Possible Mechanism of Gene Expression and Protein Synthesis Regulation Involved in the Pathogenesis of Alzheimer's Disease - review by the Khavinson group with histone binding as the proposed mechanism.
• Short Peptides Protect Fibroblast-Derived Induced Neurons from Age-Related Changes - work on induced neurons from elderly donors: more dendritic branching, less oxidative DNA damage.