Epigenetic aspects of peptide regulation of aging.
Mechanism / theoretical grounding — not clinical validation.
Khavinson VKh, Solov'ev AIu, Zhilinskii DV, Shataeva LK, Vaniushin BF. Adv Gerontol. 2012.
Organ: general-aging · Type: theoretical · Peptides: oligopeptides
PMID: 22708439
A 2012 hypothesis that endogenous short peptides bind complementary DNA sequences, ease strand separation, and protect demethylated sites from endonucleases as the genome loses methylation with age — a model, not a trial.
Editorial summary of a 2012 Advances in Gerontology article (Russian text with English abstract). Complementary-peptide and methylation hypothesis. Public pages cite PubMed only. Read the paper: PMID 22708439.
Methods
Narrative theoretical paper. The authors describe endogenous short peptides in cyto- and nucleoplasm as proteasomal products of nuclear proteins, then reason from complementary binding of charged peptide blocks to short nucleotide sequences. They connect that picture to age-related decrease in genome methylation and to peptide protection of demethylated DNA from endonuclease hydrolysis. No new wet-lab cohort is described in the abstract.
Findings
They argue that complementary peptide–DNA binding can weaken proton bonds in the double helix and stimulate strand separation needed for transcription and replication, that falling methylation with age increases site-specific peptide binding, and that bound peptide can inhibit hydrolysis of demethylated regions. They present experimental peptide–methylated-DNA data, as cited, as pointing to oligopeptide participation in epigenetic regulation of ageing.
That is a complementary-peptide / methyltransferase-era hypothesis. It is not clinical validation of any named product. Follow the PMID.