Peptide Regulation of Gene Expression: A Systematic Review

This systematic review, led by Prof. Vladimir Khavinson of the Institute of Bioregulation and Gerontology in Saint Petersburg, compiled and analyzed the accumulated evidence on the ability of short peptides (2-7 amino acids) to regulate gene expression. The article reviewed decades of research by the Russian group on peptide bioregulators, including the tripeptide EDL (Glu-Asp-Leu), known as ovagen.

The review demonstrated that short peptides possess a remarkable molecular mechanism of action:

• Penetrate the cell nucleus without the need for traditional membrane receptors
• Interact directly with nucleosomes and DNA through specific binding to DNA grooves
• Regulate DNA methylation, a fundamental epigenetic mechanism
• Influence chromatin conformation, promoting or repressing the transcription of specific genes

In the specific case of ovagen (EDL), the reviewed studies indicated that this tripeptide preferentially interacts with DNA sequences in genes related to liver function and metabolism, consistent with its origin as a bioregulator derived from liver tissue. Epigenetic regulation by ovagen included modulation of gene promoter methylation and alteration of chromatin accessibility.

The authors proposed that these short peptides represent an ancestral gene regulation system that complements classical mechanisms based on transcription factors. This perspective positions peptide bioregulators as natural epigenetic modulators with potential for geroprotective interventions, although most of the evidence still derives from in vitro studies and animal models.