2026 · 02 · 9 min read

Synthetic ACTH(4–10) analogues — Semax and related heptapeptides

CognitiveSemax

Literature on Semax (Met-Glu-His-Phe-Pro-Gly-Pro), its derivation from the natural ACTH(4–10) sequence, structural modifications described in published synthesis methodology, and preclinical investigations of melanocortin-receptor binding and BDNF expression reported across the research record.

Synthetic ACTH(4–10) analogues — Semax and related heptapeptides

Semax is a synthetic heptapeptide (Met-Glu-His-Phe-Pro-Gly-Pro) derived from the natural ACTH(4–10) fragment of adrenocorticotropic hormone, modified at the C-terminus to extend plasma stability. Reported mechanisms in published animal and cell-culture work include competitive antagonism at melanocortin MC4 and MC5 receptors and modulation of enkephalin-degrading enzyme activity.

A recurring theme in the Semax literature is its observed effect on BDNF (brain-derived neurotrophic factor) and trkB expression in rodent hippocampus and basal forebrain. Transcriptome-level studies after experimentally induced cerebral ischaemia describe gene-expression patterns related to inflammation, apoptosis, and neurotransmission. The references below are entry points into that body of work.

Bibliography

Source literature. PubMed-indexed unless noted.

  1. 01
    Semax, an ACTH(4-10) analogue with nootropic properties, activates dopaminergic and serotoninergic brain systems in rodents
    Eremin KO et al. · Neurochemical Research · 2005
    PMID 16362768
  2. 02
    Semax, an analogue of adrenocorticotropin (4-10), binds specifically and increases levels of brain-derived neurotrophic factor protein in rat basal forebrain
    Dolotov OV et al. · Journal of Neurochemistry · 2006
    PMID 16635254
  3. 03
    Semax, an analog of ACTH(4-10) with cognitive effects, regulates BDNF and trkB expression in the rat hippocampus
    Shadrina MI et al. · Brain Research · 2010
    PMID 16996037
  4. 04
    Novel Insights into the Protective Properties of ACTH(4-7)PGP (Semax) Peptide at the Transcriptome Level Following Cerebral Ischaemia-Reperfusion in Rats
    2020
    PMID 32580520
  5. 05
    Antidepressant-like and antistress effects of the ACTH(4-10) synthetic analogs Semax and Melanotan II on male rats in a model of chronic unpredictable stress
    2024
    PMID 39442746

Disclaimer · Citations are provided as reference material from the published research literature. Strata sells research compounds for laboratory use only and does not interpret, recommend, or extrapolate findings to human application.