Semax & BDNF Modulation in CNS Models
Mechanistic review of neurotrophic and dopaminergic signaling.
- 1Semax is an ACTH(4-10) analog with no cortisol-axis activity.
- 2Rapidly upregulates BDNF and NGF in CNS tissue.
- 3Modulates dopamine turnover and improves cerebrovascular perfusion in models.
- 4Primarily studied in stroke-recovery and attention research.
Origin
Semax is a synthetic heptapeptide analog of ACTH(4-10) developed in Russia. Unlike its parent peptide, Semax does not raise cortisol — the active fragment is decoupled from the adrenal axis, leaving the neurotrophic and behavioral activity.
BDNF and NGF Upregulation
In hippocampal cell cultures and rodent brain tissue, Semax rapidly increases BDNF and NGF transcription. This is the most reproducible mechanistic finding across the literature and is the likely substrate for the cognitive-research signal.
Dopaminergic and Cerebrovascular Effects
Secondary effects include modulation of dopamine turnover in frontal cortex and improved cerebrovascular perfusion in ischemia models. These pathways are why Semax is studied in stroke-recovery and attention paradigms.