Description
N-Acetyl Semax The peptide consists of a 4 amino acid fragment (Met-Glu-His-Phe) from the chain of melanocortin hormones. These include the adrenocorticotropic hormone (ACTH) and a Pro-Gly-Pro fragment. The integration of Pro-Gly-Pro (PGP) into N-Acetyl Semax may potentially enhance the permeability of the peptide through the blood-brain barrier (BBB). This enhancement might occur by increasing the peptide’s lipophilicity, thereby potentially improving passive diffusion or uptake via lipid raft-mediated endocytosis.
This process may hypothetically allow the peptide to bypass the BBB’s tight junctions, which researchers claim are usually highly restrictive. Adding PGP at the C-terminus might also modify the peptide’s interactions with specific BBB transporters or receptors, possibly facilitating receptor-mediated transcytosis. Receptor-mediated transcytosis is a process where substances are transported across cells via specific receptors, and alterations at the C-terminus might influence this pathway.
Researchers have noted that the acetylation of the peptide into N-Acetyl Semax appears to reduce the affinity of other ions, such as Cu++, to its N-terminus.[1] Acetylation may contribute to an increase in the peptide’s resistance to enzymatic degradation, potentially leading to an extended half-life observed in experimental models. Increased resistance to degradation might mean that the peptide potentially remains active for a longer period, which may enhance its stability./p>
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