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Use case

Peptides for neuroprotection research

The peptides studied in ischaemic, oxidative, and excitotoxic injury models form a mechanistically diverse cluster, with the strongest clinical evidence base in the cognitive-peptide field. This hub collects them, distinguishes acute neuroprotection from cognitive enhancement, and orients researchers to the mechanism that fits the particular injury model being studied.

The injury cascade

What neuroprotection is protecting against

The standard ischaemic injury model involves a cascade of damaging events. Within minutes of vascular occlusion, affected neurons depolarise and release glutamate. Persistent NMDA receptor activation drives calcium influx beyond cellular buffering capacity — the excitotoxic event. Mitochondria fail; reactive oxygen species accumulate; microglia activate and release pro-inflammatory cytokines. Hours later, the apoptotic machinery engages and neurons in the penumbra die.

A neuroprotective intervention can in principle act at any point in this cascade. Compounds that attenuate excitotoxicity protect the early window; antioxidants address the oxidative phase; anti-inflammatory agents address microglial activation; anti-apoptotic agents address the late cell-death phase. The peptides in this hub act on different combinations of these points, which is why head-to-head comparisons between them tend not to identify a clean winner.

The candidates

Peptides relevant to neuroprotection research

Neuroprotection

Cerebrolysin

A complex mixture of low-molecular-weight peptides and free amino acids derived from porcine brain tissue, studied extensively in cognitive decline and post-stroke recovery research.

Neuroprotection

Pinealon

A short tripeptide bioregulator studied in Russian gerontology research for neuroprotective and anti-ageing effects on the central nervous system.

Neurogenesis

FGL Peptide

A 15-amino-acid peptide mimetic of the FGL loop of the neural cell adhesion molecule (NCAM), studied for neurogenic, synaptogenic, and memory-enhancing effects in cellular and animal research.

Cognitive Enhancement

Semax

A synthetic heptapeptide analogue of ACTH(4-10) developed in Russia for cognitive enhancement, neuroprotection, and stroke recovery research.

Neurogenesis

Dihexa

An orally active hexapeptide derivative of angiotensin IV, characterised in academic research as among the most potent known pro-cognitive compounds in animal models.

Mechanism mapping

Which peptide acts where in the cascade

Cerebrolysin — multi-component, all phases

Cerebrolysin contains bioactive fragments mimicking multiple neurotrophic factors (BDNF, NGF, GDNF) and acts across the injury cascade — anti-excitotoxic, antioxidant, anti-apoptotic, neurotrophic. The clinical-trial record in acute ischaemic stroke is the strongest in the cluster.

Semax — BDNF induction and antioxidant

Semax raises hippocampal and cortical BDNF/NGF expression and reduces lipid peroxidation markers in ischaemia models. Russian clinical research on post-stroke rehabilitation has reported faster recovery of neurological function with Semax adjunct therapy.

Pinealon — oxidative-stress attenuation

Pinealon's mechanism centres on upregulation of endogenous antioxidant enzyme expression — superoxide dismutase, catalase — and direct attenuation of glutamate excitotoxicity in cell-culture work. Khavinson-school bioregulator pharmacology.

FGL — pro-survival and synaptogenic

FGL activates FGFR1 downstream signalling (PI3K-Akt, MAPK), which is both anti-apoptotic in the acute phase and pro-synaptogenic in the recovery phase. Studied principally in animal models of CNS injury.

FAQ

Common questions

Cerebrolysin has the largest body of randomised clinical trials in stroke recovery and vascular dementia. Semax has the strongest single-peptide clinical-research record in post-stroke rehabilitation, primarily from Russian work. The two are mechanistically distinct — Cerebrolysin is a multi-component preparation; Semax is a defined heptapeptide — and the evidence bases are largely complementary rather than overlapping.
Cerebrolysin profileDihexa vs CerebrolysinSynaptogenic hub