What Is Selank?
Selank is a synthetic heptapeptide analogue of tuftsin — an endogenous immunomodulatory tetrapeptide (Thr-Lys-Pro-Arg) produced by enzymatic cleavage of IgG — developed by the Institute of Molecular Genetics of the Russian Academy of Sciences. By extending the tuftsin sequence with a Pro-Gly-Pro tripeptide tail, researchers created a compound with markedly improved metabolic stability and a broader biological activity profile encompassing both immune modulation and central nervous system effects.
N-Acetyl Selank Amidate represents a further-optimized variant, with N-terminal acetylation and C-terminal amidation that confer resistance to aminopeptidase and carboxypeptidase degradation respectively. This enhanced stability translates to greater potency and duration in biological models, and it is the form most commonly used in contemporary research protocols.
Selank Mechanism of Action
- GABAergic modulation: Research demonstrates Selank increases expression of GABA-A receptor subunits in rodent brain tissue, contributing to anxiolytic effects without the receptor downregulation and tolerance associated with benzodiazepine binding
- BDNF and NGF upregulation: Multiple studies document Selank-induced increases in BDNF and NGF expression in hippocampal and cortical tissue, supporting neuroprotective and cognitive research applications
- Serotonergic and dopaminergic modulation: Animal studies show Selank normalizes serotonin metabolism and modulates dopaminergic tone in limbic regions, relevant to anxiety and mood regulation research models
- Enkephalin system interaction: Selank inhibits enkephalin-degrading enzymes, raising endogenous opioid peptide levels — a proposed contributor to its anxiolytic profile distinct from classical receptor binding mechanisms
- Immune modulation (tuftsin pathway): Via its tuftsin sequence origin, Selank activates tuftsin receptors on monocytes and macrophages, modulating innate immune activity and cytokine profiles in inflammatory research models
Selank Research Data
- Anxiolytic effects (rodent models): Multiple published studies demonstrate Selank reduces anxiety-related behavior in elevated plus maze, open field, and conditioned avoidance tests at doses where no sedation or motor impairment is observed — a key differentiator from benzodiazepines in research model design
- Russian clinical research: Published Russian clinical studies have examined Selank in patients with generalized anxiety disorder and neurasthenia, reporting significant reductions in anxiety and irritability scores on standardized scales compared to baseline, with a favorable tolerability profile
- Cognitive effects: Rodent studies demonstrate Selank improves performance in memory consolidation and spatial learning tasks, associated with hippocampal BDNF upregulation — consistent with its shared mechanistic features with Semax
- Immune research: Cell culture and animal studies confirm Selank modulates IL-6, TNF-α, and IFN-γ production in activated immune cells, supporting research into its immunoregulatory effects
Selank Dosage Reference
| Research Context | Dose from Published Studies | Route |
|---|---|---|
| Anxiolytic (rodent, acute) | 100–300 mcg/kg | IP or intranasal |
| Cognitive/memory (rodent) | 100–500 mcg/kg/day | IP or intranasal |
| Russian clinical studies (anxiety) | 200–400 mcg/day | Intranasal |
| N-Acetyl Selank Amidate (enhanced form) | Approx. 5–10x lower than unmodified | Intranasal |
Published literature data provided for research reference only. Not dosing guidance for human use.
Side Effects from Research Data
- Generally well-tolerated in published Russian clinical studies
- No significant sedation at anxiolytic doses — a key distinction from benzodiazepines in research models
- No withdrawal or tolerance phenomena reported in published studies
- Mild nasal irritation with intranasal administration in some subjects
- No significant autonomic, cardiovascular, or hepatic adverse signals in published literature
Selank vs. Semax — Neuropeptide Research Comparison
| Parameter | N-Acetyl Selank Amidate | Semax Amidate |
|---|---|---|
| Peptide origin | Tuftsin analogue | ACTH 4-10 fragment |
| Primary CNS effect | Anxiolytic, calming | Activating, neuroprotective |
| BDNF upregulation | Moderate | Strong (primary mechanism) |
| GABAergic involvement | Yes | Minimal |
| Immune modulation | Yes (tuftsin pathway) | Minimal |
| Research application | Anxiety, immunology, cognition | Neuroprotection, stroke, cognition |
Where to Buy N-Acetyl Selank Amidate for Research
The enhanced modifications (N-acetyl, amidate) that make this variant more potent also require MS/MS verification to confirm correct synthesis. Key supplier criteria:
- HPLC purity ≥99% with batch certificate
- MS/MS confirmation of N-acetylation and C-terminal amidation
- Correct formulation for nasal delivery if spray format is required
- Third-party independent COA
- Cold storage and delivery protocols
Core Power Peptides supplies N-Acetyl Selank Amidate Spray at ≥99% purity, HPLC and MS/MS verified per batch, with third-party COA available on request.
Research Disclaimer: All information on this page is for educational and scientific reference purposes only. Selank and its analogues are not approved therapeutic agents in most jurisdictions. This product is sold strictly for in vitro research and laboratory use only. Not for human consumption. Not medical advice.