Semax is a synthetic ACTH-fragment-derived peptide investigated for neurotrophin signaling and responses to experimental brain injury, with strongly time- and tissue-dependent findings in rodent studies.
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ACTH-fragment-derived heptapeptide
Semax has the sequence Met-Glu-His-Phe-Pro-Gly-Pro and is described in the literature as an ACTH(4–10) analog. This seven-residue construct differs from the full adrenocorticotropic hormone. Its origin does not imply equivalence to ACTH endocrine activity, and the experimental literature should be interpreted according to the actual peptide and model examined.
This reference describes the published literature. Exact supplied form and chemical specifications require product-specific documentation. The studies are linked in Selected literature.
Research has focused on neurotrophin pathways, including BDNF and its receptor TrkB, rather than establishing one universally predictive molecular target. In rats, investigators observed changes in BDNF protein, receptor activation, and relevant transcripts. Other studies found increases or decreases depending on the brain region and observation time, making a simple claim that Semax always raises BDNF inaccurate.
A rat study associated Semax exposure with altered hippocampal BDNF and TrkB measures and changes in an avoidance-learning task. These findings link molecular and behavioral observations within an animal experiment; they do not demonstrate improved human memory. [1]
Following permanent cerebral-artery occlusion in rats, Semax and its Pro-Gly-Pro component changed neurotrophin and receptor-gene expression. Their partially overlapping patterns offer a way to investigate peptide-fragment contributions in an injured brain. [2]
Another rat experiment compared hippocampus, frontal cortex, and retina. NGF and BDNF transcript responses differed across tissues and time points, including opposing directions. Sampling choices therefore materially affect the interpretation of a neurotrophin result. [3]
Study topics describe the cited models, not established benefits of this catalog material.
These selected primary papers establish experimental effects on rodent signaling and transcription. They do not provide controlled human evidence for stroke recovery, general cognitive enhancement, or treatment of mood and attention disorders, even when such applications motivate the research.
Gene expression is distinct from protein function, functional recovery, and a durable clinical outcome. Species, injury state, peptide processing, and assay timing limit translation. Research-material identity alone also does not establish equivalence to a formulation used in a clinical setting.
Primary studies and clearly identified supporting sources. Each link opens the original record.
Rat hippocampal signaling and behavior; not a human cognition trial.
Rat cerebral-ischemia transcription experiment; final publication 2010, online 2009.
Time- and tissue-dependent rat transcription responses; final publication 2010, online 2009.
Literature reviewed October 2026. This is a selected research overview, not an exhaustive systematic review. Published findings do not establish the identity, purity, sterility or suitability of any WYZ batch. For laboratory research only; not for human or veterinary use.
Final product specifications and product-specific storage instructions have not been supplied. Review the original documentation and your laboratory’s procedures before obtaining or using the material.
For qualified laboratory researchers. Not for human or veterinary use. Product information is not medical advice or a recommendation for personal use.
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