Research Comparison
Pinealon (EDR) vs SS-31
A side-by-side research comparison of Pinealon (EDR) and SS-31 drawn from DRPSHP' peptide database records.
Pinealon (EDR)
Pinealon sits on a contested premise. It is the synthetic tripeptide Glu-Asp-Arg, one of a set of very short bioregulator peptides described by a Russian research group whose proposal is that peptides this small act on gene expression directly, with no conventional receptor involved. That proposal has had little testing by anyone outside the group that made it. The literature is correspondingly narrow: cultured neurons and other cell types, rodent studies on the nervous system and oxidative stress, and computational modelling of how three residues might bind DNA, nearly all of it from that group and its collaborators. Human data are very limited.
SS-31
SS-31, known clinically as elamipretide, is a four-residue peptide built to home in on mitochondria. Its sequence is D-Arg-Dmt-Lys-Phe-NH2, where Dmt stands for 2',6'-dimethyltyrosine. A D-amino acid at the front resists enzymatic breakdown, and at neutral pH the molecule has a net charge of +3. The SS label honours Szeto and Schiller, whose group derived a family of such peptides from opioid chemistry, although SS-31 itself is described as lacking opioid activity. Mechanistic work mostly uses isolated mitochondria, cell lines and rodent models of ischaemia. Human trials exist, particularly in inherited mitochondrial disease, but they are smaller and less uniform than the preclinical data.
Reading a comparison
A comparison places two records side by side; it does not merge them. Each description above is drawn from that compound's own record, and the two were not necessarily characterised by the same methods, at the same time, or to the same level of detail. Before comparing any attribute, it is worth establishing that both records describe the substance you think they describe — names are not identifiers, and two entries sharing a name can differ in salt form, stereochemistry or the convention used to state a mass. Where a figure carries no method beside it, the comparison is between two reported numbers rather than between two measurements.