Semax (10mg)
Semax
Met-Glu-His-Phe-Pro-Gly-Pro
Overview
Semax is a synthetic heptapeptide based on ACTH(4-7) (the fragment Met-Glu-His-Phe from adrenocorticotropic hormone) with an added Pro-Gly-Pro C-terminal extension for metabolic stability. Developed at the Institute of Molecular Genetics of the Russian Academy of Sciences alongside selank, semax is approved in Russia as a nootropic and neuroprotective medication. Semax does not activate the melanocortin receptors associated with full-length ACTH and does not affect cortisol or adrenal function. Instead, it influences brain function through modulation of neurotrophic factor expression. Research has shown semax significantly upregulates BDNF (brain-derived neurotrophic factor) and its receptor TrkB, as well as NGF (nerve growth factor) in the hippocampus and cortex. These neurotrophins are critical for neuronal survival, synaptic plasticity, and learning. Semax also modulates monoaminergic neurotransmission. It influences dopaminergic and serotonergic systems in the brain, which may contribute to its cognitive-enhancing and antidepressant-like effects observed in behavioral studies. In stroke research, semax has shown neuroprotective effects when administered during the acute phase of cerebral ischemia, reducing infarct volume and improving functional outcomes in animal models.
Mechanism of Action
Semax is a synthetic heptapeptide based on ACTH(4-7) (the fragment Met-Glu-His-Phe from adrenocorticotropic hormone) with an added Pro-Gly-Pro C-terminal extension for metabolic stability. Developed at the Institute of Molecular Genetics of the Russian Academy of Sciences alongside selank, semax is approved in Russia as a nootropic and neuroprotective medication. Semax does not activate the melanocortin receptors associated with full-length ACTH and does not affect cortisol or adrenal function. Instead, it influences brain function through modulation of neurotrophic factor expression. Research has shown semax significantly upregulates BDNF (brain-derived neurotrophic factor) and its receptor TrkB, as well as NGF (nerve growth factor) in the hippocampus and cortex. These neurotrophins are critical for neuronal survival, synaptic plasticity, and learning. Semax also modulates monoaminergic neurotransmission. It influences dopaminergic and serotonergic systems in the brain, which may contribute to its cognitive-enhancing and antidepressant-like effects observed in behavioral studies. In stroke research, semax has shown neuroprotective effects when administered during the acute phase of cerebral ischemia, reducing infarct volume and improving functional outcomes in animal models.
Key Research Findings
- Levitskaya et al. (2004) demonstrated semax enhances BDNF and TrkB expression in the rat hippocampus and basal forebrain.
- Dolotov et al. (2006) showed semax increases NGF and BDNF mRNA levels in the rat brain cortex and hippocampus.
- Gusev et al. (2005) reported semax improved neurological outcomes when administered during acute ischemic stroke in a Russian clinical study.
- Ashmarin et al. (2005) reviewed the nootropic and neuroprotective activity of ACTH(4-10) analogues including semax.
Citations & References
Semax, an analogue of ACTH(4-10) with cognitive effects, regulates BDNF and trkB expression in the rat hippocampus
Dolotov OV, Karpenko EA, Inozemtseva LS, et al. — Brain Res (2006)
Semax in prevention of disease progress and development of exacerbations in patients with cerebrovascular insufficiency
Gusev EI, Skvortsova VI, Chukanova EI. — Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova (2005)
Design and investigation of an ACTH(4-10) analogue lacking D-amino acids and displaying nootropic and neuroprotective properties
Ashmarin IP, Nezavibatko VN, Levitskaya NG, et al. — Brain Res Bull (1995)
Dosage in Research
Russian clinical protocols use intranasal doses of 250-500 mcg per day (typically 3 drops of 0.1% solution per nostril). Animal neuroprotection studies use 50-150 mcg/kg. Stroke studies used 12-18 mcg/kg/day intranasally.
Dosage information is derived from published research literature and is presented for educational purposes only. This is not medical advice. All products are for laboratory research use only.
Storage & Handling
Store lyophilized (freeze-dried) powder at -20°C to 4°C in a dry environment protected from light. Unreconstituted peptide is stable for extended periods when stored properly.
Once reconstituted with bacteriostatic water or an appropriate solvent, store at 2-8°C and use within the timeframe specified on the Certificate of Analysis. Avoid repeated freeze-thaw cycles.
A Certificate of Analysis documenting purity, identity, and recommended storage conditions is included with every order.
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Research Use Only
All products are intended for laboratory research and educational purposes only. Products have not been evaluated by the FDA and are not intended for human consumption, diagnosis, treatment, or prevention of any disease. Purchasers must be 21+ and confirm research use intent.