Since we offer high-purity peptides solely for use in laboratories and research, our emphasis is on the biochemical mechanisms which underlie modern scientific discovery. In today’s article we look at the molecular profile of Epitalon, a synthetic tetrapeptide that is frequently used in studies relating to biogerontology and cellular senescence.
Disclaimer: The products offered by Elite Miami Peptides are for use in laboratory and in vitro research only and are not intended for human consumption, for diagnostic use, or for therapeutic applications. The information provided below is to be used for educational and scientific discussion.
The Fundamentals of Cellular Senescence
In the somatic cells of mammals the ends of the chromosomes are guarded by particular repetitive sequences of nucleotides called telomeres; since DNA polymerase is unable to completely copy the ends of the chromosomes with each cycle of cell division telomeres become shorter over time.
When telomeres have shortened to a critical extent, the cell takes on a state of replicative senescence and stops dividing; this is what is referred to as the Hayflick limit. In the vast majority of adult somatic cells the enzyme which is responsible for reconstructing these sequences, telomerase, stays mostly inactive. Making telomerase active again in vitro has now become a main aim of researchers who are studying cellular lifespans and chromosomal stability.
Epitalon’s Mechanism of Action: hTERT and Telomerase Activation
Epitalon (it is also frequently spelled Epithalon) is a synthetic version of epithalamin, a polypeptide complex which was first obtained from the pineal glands of cows. Research models indicate that the main mechanism of action of Epitalon lies in its interaction with the telomerase enzyme complex.
Studies carried out in a test tube show that Epitalon causes the decondensation of the pericentromeric structural heterochromatin. This results in the transcriptional activation of genes which had previously been repressed, particularly the hTERT (human telomerase reverse transcriptase) gene. The peptide promotes the expression of hTERT mRNA and thus enables the formation of active telomerase, after which this enzyme starts the elongation of the telomeric DNA sequences in cultured cells.
Observations in Somatic Cell Models
The effects of Epitalon have been thoroughly recorded in cultures of human fibroblasts and epithelial cells.
- Experiments carried out in vitro showed that human fetal fibroblasts which were given Epitalon were able to go beyond their normal replicative limits. The control groups reached senescence, but the cell lines that were treated showed an increased ability to proliferate as a result of the telomere length being maintained.
- The difference between normal and cancerous cell pathways has been brought out by recent independent replications, which have shown that the mechanism of Epitalon is specific. In normal, healthy mammalian cells, telomere extension takes place directly as a result of dose-dependent upregulation of hTERT and telomerase. On the other hand, in some cancer cell lines, the studies found that elongation took place through an Alternative Lengthening of Telomeres (ALT) mechanism instead of via the usual activation of telomerase. This point is important for researchers when they want to tell the difference between the preservation of healthy cells and uncontrolled oncogenic proliferation.
Chemical Profile and Structural Data
Epitalon has a short and highly specific sequence of amino acids, which was identified by the researchers as the biologically active part of the native pineal extract.
Property | Specification |
Sequence | L-Alanyl-L-Glutamyl-L-Aspartyl-Glycine (Ala-Glu-Asp-Gly) |
Molecular Formula | C14H22N4O9 |
Molecular Weight | 390.35 g/mol |
CAS Number | 307297-39-8 |
Primary Research Application | In vitro telomerase induction and heterochromatin decondensation |
Conclusion for the Research Community
Epitalon offers a focused, synthetic means for researchers who are studying chromosomal degradation, gene expression, and cellular ageing models. It is a valuable tool for investigating whether cellular senescence can be delayed or controlled in controlled laboratory settings because it increases telomerase activity at the transcription level.
Please note that Elite Miami Peptides offers Epitalon solely for use in rigorous scientific research and prohibits its administration to humans or animals.