Research Overview
The bioregulator concept
Khavinson's group proposed that short peptides extracted from a given organ act as tissue-specific regulators of gene expression, entering cells and interacting with DNA or chromatin-associated proteins to influence transcription of genes characteristic of that tissue. Endoluten belongs to the extract arm of that programme, and its published characterisation is largely in Russian-language journals and conference literature. Peptides in these fractions are typically described as very short — di-, tri- and tetrapeptides — which is what motivated the later synthesis of defined analogues.
Endoluten and Epitalon
Epitalon, the tetrapeptide Ala-Glu-Asp-Gly, was designed as a synthetic stand-in for the activity attributed to pineal extract, and it is the most studied member of the pineal branch of the family. Reported research on Epitalon includes telomerase activity in cultured human fibroblasts, melatonin rhythm normalisation in aged animals, and lifespan endpoints in rodent studies. Endoluten is discussed in the same context but as the extract form, which means the exact molecular species responsible for any reported effect is not defined.
What to weigh when interpreting the evidence
- Extracts vary between preparations; lot-to-lot composition is inherently less controlled than a synthetic peptide
- Much of the primary literature is not indexed in mainstream English-language databases
- Independent replication of key lifespan and telomerase findings outside the originating groups is limited
- Oral peptide absorption is generally poor, which is an open question for capsule formats of any peptide
- Comparisons against a defined synthetic analogue such as Epitalon give a cleaner mechanistic read
